dlls/mf/session.c

   1 /*
   2  * Copyright 2017 Nikolay Sivov
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <math.h>
  21 #include <float.h>
  22
  23 #define COBJMACROS
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "mfidl.h"
  28 #include "evr.h"
  29
  30 #include "wine/debug.h"
  31 #include "wine/list.h"
  32
  33 #include "mf_private.h"
  34
  35 #include "initguid.h"
  36
  37 DEFINE_GUID(_MF_TOPONODE_IMFActivate, 0x33706f4a, 0x309a, 0x49be, 0xa8, 0xdd, 0xe7, 0xc0, 0x87, 0x5e, 0xb6, 0x79);
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(mfplat);
  40
  41 enum session_command
  42 {
  43     SESSION_CMD_CLEAR_TOPOLOGIES,
  44     SESSION_CMD_CLOSE,
  45     SESSION_CMD_SET_TOPOLOGY,
  46     SESSION_CMD_START,
  47     SESSION_CMD_PAUSE,
  48     SESSION_CMD_STOP,
  49     SESSION_CMD_SET_RATE,
  50     SESSION_CMD_SHUTDOWN,
  51 };
  52
  53 struct session_op
  54 {
  55     IUnknown IUnknown_iface;
  56     LONG refcount;
  57     enum session_command command;
  58     union
  59     {
  60         struct
  61         {
  62             DWORD flags;
  63             IMFTopology *topology;
  64         } set_topology;
  65         struct
  66         {
  67             GUID time_format;
  68             PROPVARIANT start_position;
  69         } start;
  70         struct
  71         {
  72             BOOL thin;
  73             float rate;
  74         } set_rate;
  75         struct
  76         {
  77             IMFTopology *topology;
  78         } notify_topology;
  79     };
  80     struct list entry;
  81 };
  82
  83 struct queued_topology
  84 {
  85     struct list entry;
  86     IMFTopology *topology;
  87     MF_TOPOSTATUS status;
  88 };
  89
  90 enum session_state
  91 {
  92     SESSION_STATE_STOPPED = 0,
  93     SESSION_STATE_STARTING_SOURCES,
  94     SESSION_STATE_PREROLLING_SINKS,
  95     SESSION_STATE_STARTING_SINKS,
  96     SESSION_STATE_STARTED,
  97     SESSION_STATE_PAUSING_SINKS,
  98     SESSION_STATE_PAUSING_SOURCES,
  99     SESSION_STATE_PAUSED,
 100     SESSION_STATE_STOPPING_SINKS,
 101     SESSION_STATE_STOPPING_SOURCES,
 102     SESSION_STATE_FINALIZING_SINKS,
 103     SESSION_STATE_CLOSED,
 104     SESSION_STATE_SHUT_DOWN,
 105 };
 106
 107 enum object_state
 108 {
 109     OBJ_STATE_STOPPED = 0,
 110     OBJ_STATE_STARTED,
 111     OBJ_STATE_PAUSED,
 112     OBJ_STATE_PREROLLED,
 113     OBJ_STATE_INVALID,
 114 };
 115
 116 enum media_source_flags
 117 {
 118     SOURCE_FLAG_END_OF_PRESENTATION = 0x1,
 119 };
 120
 121 struct media_source
 122 {
 123     struct list entry;
 124     union
 125     {
 126         IMFMediaSource *source;
 127         IUnknown *object;
 128     };
 129     IMFPresentationDescriptor *pd;
 130     enum object_state state;
 131     unsigned int flags;
 132 };
 133
 134 struct media_sink
 135 {
 136     struct list entry;
 137     union
 138     {
 139         IMFMediaSink *sink;
 140         IUnknown *object;
 141     };
 142     IMFMediaSinkPreroll *preroll;
 143     IMFMediaEventGenerator *event_generator;
 144     BOOL finalized;
 145 };
 146
 147 struct sample
 148 {
 149     struct list entry;
 150     IMFSample *sample;
 151 };
 152
 153 struct transform_stream
 154 {
 155     struct list samples;
 156     unsigned int requests;
 157     unsigned int min_buffer_size;
 158     BOOL draining;
 159 };
 160
 161 enum topo_node_flags
 162 {
 163     TOPO_NODE_END_OF_STREAM = 0x1,
 164     TOPO_NODE_SCRUB_SAMPLE_COMPLETE = 0x2,
 165 };
 166
 167 struct topo_node
 168 {
 169     struct list entry;
 170     struct media_session *session;
 171     MF_TOPOLOGY_TYPE type;
 172     TOPOID node_id;
 173     IMFTopologyNode *node;
 174     enum object_state state;
 175     unsigned int flags;
 176     union
 177     {
 178         IMFMediaStream *source_stream;
 179         IMFStreamSink *sink_stream;
 180         IMFTransform *transform;
 181         IUnknown *object;
 182     } object;
 183
 184     union
 185     {
 186         struct
 187         {
 188             IMFMediaSource *source;
 189             DWORD stream_id;
 190         } source;
 191         struct
 192         {
 193             unsigned int requests;
 194             IMFVideoSampleAllocatorNotify notify_cb;
 195             IMFVideoSampleAllocator *allocator;
 196             IMFVideoSampleAllocatorCallback *allocator_cb;
 197         } sink;
 198         struct
 199         {
 200             struct transform_stream *inputs;
 201             DWORD *input_map;
 202             unsigned int input_count;
 203             unsigned int next_input;
 204
 205             struct transform_stream *outputs;
 206             DWORD *output_map;
 207             unsigned int output_count;
 208         } transform;
 209     } u;
 210 };
 211
 212 enum presentation_flags
 213 {
 214     SESSION_FLAG_SOURCES_SUBSCRIBED = 0x1,
 215     SESSION_FLAG_PRESENTATION_CLOCK_SET = 0x2,
 216     SESSION_FLAG_FINALIZE_SINKS = 0x4,
 217     SESSION_FLAG_NEEDS_PREROLL = 0x8,
 218     SESSION_FLAG_END_OF_PRESENTATION = 0x10,
 219     SESSION_FLAG_PENDING_RATE_CHANGE = 0x20,
 220     SESSION_FLAG_PENDING_COMMAND = 0x40,
 221 };
 222
 223 struct media_session
 224 {
 225     IMFMediaSession IMFMediaSession_iface;
 226     IMFGetService IMFGetService_iface;
 227     IMFRateSupport IMFRateSupport_iface;
 228     IMFRateControl IMFRateControl_iface;
 229     IMFTopologyNodeAttributeEditor IMFTopologyNodeAttributeEditor_iface;
 230     IMFAsyncCallback commands_callback;
 231     IMFAsyncCallback sa_ready_callback;
 232     IMFAsyncCallback events_callback;
 233     IMFAsyncCallback sink_finalizer_callback;
 234     LONG refcount;
 235     IMFMediaEventQueue *event_queue;
 236     IMFPresentationClock *clock;
 237     IMFPresentationTimeSource *system_time_source;
 238     IMFRateControl *clock_rate_control;
 239     IMFTopoLoader *topo_loader;
 240     IMFQualityManager *quality_manager;
 241     struct
 242     {
 243         IMFTopology *current_topology;
 244         MF_TOPOSTATUS topo_status;
 245         MFTIME clock_stop_time;
 246         unsigned int flags;
 247         struct list sources;
 248         struct list sinks;
 249         struct list nodes;
 250
 251         /* Latest Start() arguments. */
 252         GUID time_format;
 253         PROPVARIANT start_position;
 254         /* Latest SetRate() arguments. */
 255         BOOL thin;
 256         float rate;
 257     } presentation;
 258     struct list topologies;
 259     struct list commands;
 260     enum session_state state;
 261     DWORD caps;
 262     CRITICAL_SECTION cs;
 263 };
 264
 265 static inline struct media_session *impl_from_IMFMediaSession(IMFMediaSession *iface)
 266 {
 267     return CONTAINING_RECORD(iface, struct media_session, IMFMediaSession_iface);
 268 }
 269
 270 static struct media_session *impl_from_commands_callback_IMFAsyncCallback(IMFAsyncCallback *iface)
 271 {
 272     return CONTAINING_RECORD(iface, struct media_session, commands_callback);
 273 }
 274
 275 static struct media_session *impl_from_sa_ready_callback_IMFAsyncCallback(IMFAsyncCallback *iface)
 276 {
 277     return CONTAINING_RECORD(iface, struct media_session, sa_ready_callback);
 278 }
 279
 280 static struct media_session *impl_from_events_callback_IMFAsyncCallback(IMFAsyncCallback *iface)
 281 {
 282     return CONTAINING_RECORD(iface, struct media_session, events_callback);
 283 }
 284
 285 static struct media_session *impl_from_sink_finalizer_callback_IMFAsyncCallback(IMFAsyncCallback *iface)
 286 {
 287     return CONTAINING_RECORD(iface, struct media_session, sink_finalizer_callback);
 288 }
 289
 290 static struct media_session *impl_from_IMFGetService(IMFGetService *iface)
 291 {
 292     return CONTAINING_RECORD(iface, struct media_session, IMFGetService_iface);
 293 }
 294
 295 static struct media_session *impl_session_from_IMFRateSupport(IMFRateSupport *iface)
 296 {
 297     return CONTAINING_RECORD(iface, struct media_session, IMFRateSupport_iface);
 298 }
 299
 300 static struct media_session *impl_session_from_IMFRateControl(IMFRateControl *iface)
 301 {
 302     return CONTAINING_RECORD(iface, struct media_session, IMFRateControl_iface);
 303 }
 304
 305 static struct media_session *impl_session_from_IMFTopologyNodeAttributeEditor(IMFTopologyNodeAttributeEditor *iface)
 306 {
 307     return CONTAINING_RECORD(iface, struct media_session, IMFTopologyNodeAttributeEditor_iface);
 308 }
 309
 310 static struct session_op *impl_op_from_IUnknown(IUnknown *iface)
 311 {
 312     return CONTAINING_RECORD(iface, struct session_op, IUnknown_iface);
 313 }
 314
 315 static struct topo_node *impl_node_from_IMFVideoSampleAllocatorNotify(IMFVideoSampleAllocatorNotify *iface)
 316 {
 317     return CONTAINING_RECORD(iface, struct topo_node, u.sink.notify_cb);
 318 }
 319
 320 /* IMFLocalMFTRegistration */
 321 static HRESULT WINAPI local_mft_registration_QueryInterface(IMFLocalMFTRegistration *iface, REFIID riid, void **obj)
 322 {
 323     TRACE("%p, %s, %p.\n", iface, debugstr_guid(riid), obj);
 324
 325     if (IsEqualIID(riid, &IID_IMFLocalMFTRegistration) ||
 326             IsEqualIID(riid, &IID_IUnknown))
 327     {
 328         *obj = iface;
 329         IMFLocalMFTRegistration_AddRef(iface);
 330         return S_OK;
 331     }
 332
 333     WARN("Unexpected %s.\n", debugstr_guid(riid));
 334     *obj = NULL;
 335     return E_NOINTERFACE;
 336 }
 337
 338 static ULONG WINAPI local_mft_registration_AddRef(IMFLocalMFTRegistration *iface)
 339 {
 340     return 2;
 341 }
 342
 343 static ULONG WINAPI local_mft_registration_Release(IMFLocalMFTRegistration *iface)
 344 {
 345     return 1;
 346 }
 347
 348 static HRESULT WINAPI local_mft_registration_RegisterMFTs(IMFLocalMFTRegistration *iface, MFT_REGISTRATION_INFO *info,
 349         DWORD count)
 350 {
 351     HRESULT hr = S_OK;
 352     DWORD i;
 353
 354     TRACE("%p, %p, %lu.\n", iface, info, count);
 355
 356     for (i = 0; i < count; ++i)
 357     {
 358         if (FAILED(hr = MFTRegisterLocalByCLSID(&info[i].clsid, &info[i].guidCategory, info[i].pszName,
 359                 info[i].uiFlags, info[i].cInTypes, info[i].pInTypes, info[i].cOutTypes, info[i].pOutTypes)))
 360         {
 361             break;
 362         }
 363     }
 364
 365     return hr;
 366 }
 367
 368 static const IMFLocalMFTRegistrationVtbl local_mft_registration_vtbl =
 369 {
 370     local_mft_registration_QueryInterface,
 371     local_mft_registration_AddRef,
 372     local_mft_registration_Release,
 373     local_mft_registration_RegisterMFTs,
 374 };
 375
 376 static IMFLocalMFTRegistration local_mft_registration = { &local_mft_registration_vtbl };
 377
 378 static HRESULT WINAPI session_op_QueryInterface(IUnknown *iface, REFIID riid, void **obj)
 379 {
 380     if (IsEqualIID(riid, &IID_IUnknown))
 381     {
 382         *obj = iface;
 383         IUnknown_AddRef(iface);
 384         return S_OK;
 385     }
 386
 387     *obj = NULL;
 388     return E_NOINTERFACE;
 389 }
 390
 391 static ULONG WINAPI session_op_AddRef(IUnknown *iface)
 392 {
 393     struct session_op *op = impl_op_from_IUnknown(iface);
 394     ULONG refcount = InterlockedIncrement(&op->refcount);
 395
 396     TRACE("%p, refcount %lu.\n", iface, refcount);
 397
 398     return refcount;
 399 }
 400
 401 static ULONG WINAPI session_op_Release(IUnknown *iface)
 402 {
 403     struct session_op *op = impl_op_from_IUnknown(iface);
 404     ULONG refcount = InterlockedDecrement(&op->refcount);
 405
 406     TRACE("%p, refcount %lu.\n", iface, refcount);
 407
 408     if (!refcount)
 409     {
 410         switch (op->command)
 411         {
 412             case SESSION_CMD_SET_TOPOLOGY:
 413                 if (op->set_topology.topology)
 414                     IMFTopology_Release(op->set_topology.topology);
 415                 break;
 416             case SESSION_CMD_START:
 417                 PropVariantClear(&op->start.start_position);
 418                 break;
 419             default:
 420                 ;
 421         }
 422         free(op);
 423     }
 424
 425     return refcount;
 426 }
 427
 428 static const IUnknownVtbl session_op_vtbl =
 429 {
 430     session_op_QueryInterface,
 431     session_op_AddRef,
 432     session_op_Release,
 433 };
 434
 435 static HRESULT create_session_op(enum session_command command, struct session_op **ret)
 436 {
 437     struct session_op *op;
 438
 439     if (!(op = calloc(1, sizeof(*op))))
 440         return E_OUTOFMEMORY;
 441
 442     op->IUnknown_iface.lpVtbl = &session_op_vtbl;
 443     op->refcount = 1;
 444     op->command = command;
 445
 446     *ret = op;
 447
 448     return S_OK;
 449 }
 450
 451 static HRESULT session_is_shut_down(struct media_session *session)
 452 {
 453     return session->state == SESSION_STATE_SHUT_DOWN ? MF_E_SHUTDOWN : S_OK;
 454 }
 455
 456 static HRESULT session_submit_command(struct media_session *session, struct session_op *op)
 457 {
 458     HRESULT hr;
 459
 460     TRACE("session %p, op %p, command %u.\n", session, op, op->command);
 461
 462     EnterCriticalSection(&session->cs);
 463     if (SUCCEEDED(hr = session_is_shut_down(session)))
 464     {
 465         if (list_empty(&session->commands) && !(session->presentation.flags & SESSION_FLAG_PENDING_COMMAND))
 466             hr = MFPutWorkItem(MFASYNC_CALLBACK_QUEUE_STANDARD, &session->commands_callback, &op->IUnknown_iface);
 467         if (op->command == SESSION_CMD_SHUTDOWN)
 468             list_add_head(&session->commands, &op->entry);
 469         else
 470             list_add_tail(&session->commands, &op->entry);
 471         IUnknown_AddRef(&op->IUnknown_iface);
 472     }
 473     LeaveCriticalSection(&session->cs);
 474
 475     return hr;
 476 }
 477
 478 static HRESULT session_submit_simple_command(struct media_session *session, enum session_command command)
 479 {
 480     struct session_op *op;
 481     HRESULT hr;
 482
 483     if (FAILED(hr = create_session_op(command, &op)))
 484         return hr;
 485
 486     hr = session_submit_command(session, op);
 487     IUnknown_Release(&op->IUnknown_iface);
 488     return hr;
 489 }
 490
 491 static void session_clear_queued_topologies(struct media_session *session)
 492 {
 493     struct queued_topology *ptr, *next;
 494
 495     LIST_FOR_EACH_ENTRY_SAFE(ptr, next, &session->topologies, struct queued_topology, entry)
 496     {
 497         list_remove(&ptr->entry);
 498         IMFTopology_Release(ptr->topology);
 499         free(ptr);
 500     }
 501 }
 502
 503 static void session_set_topo_status(struct media_session *session, HRESULT status,
 504         MF_TOPOSTATUS topo_status)
 505 {
 506     IMFMediaEvent *event;
 507     PROPVARIANT param;
 508
 509     if (topo_status == MF_TOPOSTATUS_INVALID)
 510         return;
 511
 512     if (list_empty(&session->topologies))
 513     {
 514         FIXME("Unexpectedly empty topology queue.\n");
 515         return;
 516     }
 517
 518     if (topo_status > session->presentation.topo_status)
 519     {
 520         struct queued_topology *topology = LIST_ENTRY(list_head(&session->topologies), struct queued_topology, entry);
 521
 522         param.vt = VT_UNKNOWN;
 523         param.punkVal = (IUnknown *)topology->topology;
 524
 525         if (FAILED(MFCreateMediaEvent(MESessionTopologyStatus, &GUID_NULL, status, &param, &event)))
 526             return;
 527
 528         session->presentation.topo_status = topo_status;
 529
 530         IMFMediaEvent_SetUINT32(event, &MF_EVENT_TOPOLOGY_STATUS, topo_status);
 531         IMFMediaEventQueue_QueueEvent(session->event_queue, event);
 532         IMFMediaEvent_Release(event);
 533     }
 534 }
 535
 536 static HRESULT session_bind_output_nodes(IMFTopology *topology)
 537 {
 538     MF_TOPOLOGY_TYPE node_type;
 539     IMFStreamSink *stream_sink;
 540     IMFMediaSink *media_sink;
 541     WORD node_count = 0, i;
 542     IMFTopologyNode *node;
 543     IMFActivate *activate;
 544     UINT32 stream_id;
 545     IUnknown *object;
 546     HRESULT hr;
 547
 548     hr = IMFTopology_GetNodeCount(topology, &node_count);
 549
 550     for (i = 0; i < node_count; ++i)
 551     {
 552         if (FAILED(hr = IMFTopology_GetNode(topology, i, &node)))
 553             break;
 554
 555         if (FAILED(hr = IMFTopologyNode_GetNodeType(node, &node_type)) || node_type != MF_TOPOLOGY_OUTPUT_NODE)
 556         {
 557             IMFTopologyNode_Release(node);
 558             continue;
 559         }
 560
 561         if (SUCCEEDED(hr = IMFTopologyNode_GetObject(node, &object)))
 562         {
 563             stream_sink = NULL;
 564             if (FAILED(IUnknown_QueryInterface(object, &IID_IMFStreamSink, (void **)&stream_sink)))
 565             {
 566                 if (SUCCEEDED(hr = IUnknown_QueryInterface(object, &IID_IMFActivate, (void **)&activate)))
 567                 {
 568                     if (SUCCEEDED(hr = IMFActivate_ActivateObject(activate, &IID_IMFMediaSink, (void **)&media_sink)))
 569                     {
 570                         if (FAILED(IMFTopologyNode_GetUINT32(node, &MF_TOPONODE_STREAMID, &stream_id)))
 571                             stream_id = 0;
 572
 573                         stream_sink = NULL;
 574                         if (FAILED(IMFMediaSink_GetStreamSinkById(media_sink, stream_id, &stream_sink)))
 575                             hr = IMFMediaSink_AddStreamSink(media_sink, stream_id, NULL, &stream_sink);
 576
 577                         if (stream_sink)
 578                             hr = IMFTopologyNode_SetObject(node, (IUnknown *)stream_sink);
 579
 580                         IMFMediaSink_Release(media_sink);
 581                     }
 582
 583                     if (SUCCEEDED(hr))
 584                         IMFTopologyNode_SetUnknown(node, &_MF_TOPONODE_IMFActivate, (IUnknown *)activate);
 585
 586                     IMFActivate_Release(activate);
 587                 }
 588             }
 589
 590             if (stream_sink)
 591                 IMFStreamSink_Release(stream_sink);
 592             IUnknown_Release(object);
 593         }
 594
 595         IMFTopologyNode_Release(node);
 596     }
 597
 598     return hr;
 599 }
 600
 601 static HRESULT session_init_media_types(IMFTopology *topology)
 602 {
 603     MF_TOPOLOGY_TYPE node_type;
 604     WORD node_count, i, j;
 605     IMFTopologyNode *node;
 606     IMFMediaType *type;
 607     DWORD input_count;
 608     HRESULT hr;
 609
 610     if (FAILED(hr = IMFTopology_GetNodeCount(topology, &node_count)))
 611         return hr;
 612
 613     for (i = 0; i < node_count; ++i)
 614     {
 615         if (FAILED(hr = IMFTopology_GetNode(topology, i, &node)))
 616             break;
 617
 618         if (FAILED(hr = IMFTopologyNode_GetInputCount(node, &input_count))
 619                 || FAILED(hr = IMFTopologyNode_GetNodeType(node, &node_type))
 620                 || node_type != MF_TOPOLOGY_OUTPUT_NODE)
 621         {
 622             IMFTopologyNode_Release(node);
 623             continue;
 624         }
 625
 626         for (j = 0; j < input_count; ++j)
 627         {
 628             IMFMediaTypeHandler *handler;
 629             IMFTopologyNode *up_node;
 630             DWORD up_output;
 631
 632             if (SUCCEEDED(hr = IMFTopologyNode_GetInput(node, j, &up_node, &up_output)))
 633             {
 634                 hr = topology_node_init_media_type(up_node, up_output, TRUE, &type);
 635                 IMFTopologyNode_Release(up_node);
 636             }
 637             if (FAILED(hr))
 638                 break;
 639
 640             if (SUCCEEDED(hr = topology_node_get_type_handler(node, j, FALSE, &handler)))
 641             {
 642                 hr = IMFMediaTypeHandler_SetCurrentMediaType(handler, type);
 643                 IMFMediaTypeHandler_Release(handler);
 644             }
 645
 646             IMFMediaType_Release(type);
 647         }
 648
 649         IMFTopologyNode_Release(node);
 650     }
 651
 652     return hr;
 653 }
 654
 655 static void session_set_caps(struct media_session *session, DWORD caps)
 656 {
 657     DWORD delta = session->caps ^ caps;
 658     IMFMediaEvent *event;
 659
 660     /* Delta is documented to reflect rate value changes as well, but it's not clear what to compare
 661        them to, since session always queries for current object rates. */
 662     if (!delta)
 663         return;
 664
 665     session->caps = caps;
 666
 667     if (FAILED(MFCreateMediaEvent(MESessionCapabilitiesChanged, &GUID_NULL, S_OK, NULL, &event)))
 668         return;
 669
 670     IMFMediaEvent_SetUINT32(event, &MF_EVENT_SESSIONCAPS, caps);
 671     IMFMediaEvent_SetUINT32(event, &MF_EVENT_SESSIONCAPS_DELTA, delta);
 672
 673     IMFMediaEventQueue_QueueEvent(session->event_queue, event);
 674     IMFMediaEvent_Release(event);
 675 }
 676
 677 static HRESULT transform_stream_push_sample(struct transform_stream *stream, IMFSample *sample)
 678 {
 679     struct sample *entry;
 680
 681     if (!(entry = calloc(1, sizeof(*entry))))
 682         return E_OUTOFMEMORY;
 683
 684     entry->sample = sample;
 685     IMFSample_AddRef(entry->sample);
 686
 687     list_add_tail(&stream->samples, &entry->entry);
 688     return S_OK;
 689 }
 690
 691 static HRESULT transform_stream_pop_sample(struct transform_stream *stream, IMFSample **sample)
 692 {
 693     struct sample *entry;
 694     struct list *ptr;
 695
 696     if (!(ptr = list_head(&stream->samples)))
 697         return MF_E_TRANSFORM_NEED_MORE_INPUT;
 698
 699     entry = LIST_ENTRY(ptr, struct sample, entry);
 700     list_remove(&entry->entry);
 701     *sample = entry->sample;
 702     free(entry);
 703     return S_OK;
 704 }
 705
 706 static void transform_stream_drop_samples(struct transform_stream *stream)
 707 {
 708     IMFSample *sample;
 709
 710     while (SUCCEEDED(transform_stream_pop_sample(stream, &sample)))
 711         IMFSample_Release(sample);
 712 }
 713
 714 static void release_topo_node(struct topo_node *node)
 715 {
 716     unsigned int i;
 717
 718     switch (node->type)
 719     {
 720         case MF_TOPOLOGY_SOURCESTREAM_NODE:
 721             if (node->u.source.source)
 722                 IMFMediaSource_Release(node->u.source.source);
 723             break;
 724         case MF_TOPOLOGY_TRANSFORM_NODE:
 725             for (i = 0; i < node->u.transform.input_count; ++i)
 726                 transform_stream_drop_samples(&node->u.transform.inputs[i]);
 727             for (i = 0; i < node->u.transform.output_count; ++i)
 728                 transform_stream_drop_samples(&node->u.transform.outputs[i]);
 729             free(node->u.transform.inputs);
 730             free(node->u.transform.outputs);
 731             free(node->u.transform.input_map);
 732             free(node->u.transform.output_map);
 733             break;
 734         case MF_TOPOLOGY_OUTPUT_NODE:
 735             if (node->u.sink.allocator)
 736                 IMFVideoSampleAllocator_Release(node->u.sink.allocator);
 737             if (node->u.sink.allocator_cb)
 738             {
 739                 IMFVideoSampleAllocatorCallback_SetCallback(node->u.sink.allocator_cb, NULL);
 740                 IMFVideoSampleAllocatorCallback_Release(node->u.sink.allocator_cb);
 741             }
 742             break;
 743         default:
 744             ;
 745     }
 746
 747     if (node->object.object)
 748         IUnknown_Release(node->object.object);
 749     if (node->node)
 750         IMFTopologyNode_Release(node->node);
 751     free(node);
 752 }
 753
 754 static void session_shutdown_current_topology(struct media_session *session)
 755 {
 756     unsigned int shutdown, force_shutdown;
 757     MF_TOPOLOGY_TYPE node_type;
 758     IMFStreamSink *stream_sink;
 759     IMFTopology *topology;
 760     IMFTopologyNode *node;
 761     IMFActivate *activate;
 762     IMFMediaSink *sink;
 763     WORD idx = 0;
 764     HRESULT hr;
 765
 766     topology = session->presentation.current_topology;
 767     force_shutdown = session->state == SESSION_STATE_SHUT_DOWN;
 768
 769     /* FIXME: should handle async MFTs, but these are not supported by the rest of the pipeline currently. */
 770
 771     while (SUCCEEDED(IMFTopology_GetNode(topology, idx++, &node)))
 772     {
 773         if (SUCCEEDED(IMFTopologyNode_GetNodeType(node, &node_type)) &&
 774                 node_type == MF_TOPOLOGY_OUTPUT_NODE)
 775         {
 776             shutdown = 1;
 777             IMFTopologyNode_GetUINT32(node, &MF_TOPONODE_NOSHUTDOWN_ON_REMOVE, &shutdown);
 778
 779             if (force_shutdown || shutdown)
 780             {
 781                 if (SUCCEEDED(IMFTopologyNode_GetUnknown(node, &_MF_TOPONODE_IMFActivate, &IID_IMFActivate,
 782                         (void **)&activate)))
 783                 {
 784                     if (FAILED(hr = IMFActivate_ShutdownObject(activate)))
 785                         WARN("Failed to shut down activation object for the sink, hr %#lx.\n", hr);
 786                     IMFActivate_Release(activate);
 787                 }
 788                 else if (SUCCEEDED(topology_node_get_object(node, &IID_IMFStreamSink, (void **)&stream_sink)))
 789                 {
 790                     if (SUCCEEDED(IMFStreamSink_GetMediaSink(stream_sink, &sink)))
 791                     {
 792                         IMFMediaSink_Shutdown(sink);
 793                         IMFMediaSink_Release(sink);
 794                     }
 795
 796                     IMFStreamSink_Release(stream_sink);
 797                 }
 798             }
 799         }
 800
 801         IMFTopologyNode_Release(node);
 802     }
 803 }
 804
 805 static void session_clear_command_list(struct media_session *session)
 806 {
 807     struct session_op *op, *op2;
 808
 809     LIST_FOR_EACH_ENTRY_SAFE(op, op2, &session->commands, struct session_op, entry)
 810     {
 811         list_remove(&op->entry);
 812         IUnknown_Release(&op->IUnknown_iface);
 813     }
 814 }
 815
 816 static void session_clear_presentation(struct media_session *session)
 817 {
 818     struct media_source *source, *source2;
 819     struct media_sink *sink, *sink2;
 820     struct topo_node *node, *node2;
 821
 822     session_shutdown_current_topology(session);
 823
 824     IMFTopology_Clear(session->presentation.current_topology);
 825     session->presentation.topo_status = MF_TOPOSTATUS_INVALID;
 826     session->presentation.flags = 0;
 827
 828     LIST_FOR_EACH_ENTRY_SAFE(source, source2, &session->presentation.sources, struct media_source, entry)
 829     {
 830         list_remove(&source->entry);
 831         if (source->source)
 832             IMFMediaSource_Release(source->source);
 833         if (source->pd)
 834             IMFPresentationDescriptor_Release(source->pd);
 835         free(source);
 836     }
 837
 838     LIST_FOR_EACH_ENTRY_SAFE(node, node2, &session->presentation.nodes, struct topo_node, entry)
 839     {
 840         list_remove(&node->entry);
 841         release_topo_node(node);
 842     }
 843
 844     LIST_FOR_EACH_ENTRY_SAFE(sink, sink2, &session->presentation.sinks, struct media_sink, entry)
 845     {
 846         list_remove(&sink->entry);
 847
 848         if (sink->sink)
 849             IMFMediaSink_Release(sink->sink);
 850         if (sink->preroll)
 851             IMFMediaSinkPreroll_Release(sink->preroll);
 852         if (sink->event_generator)
 853             IMFMediaEventGenerator_Release(sink->event_generator);
 854         free(sink);
 855     }
 856 }
 857
 858 static struct topo_node *session_get_node_by_id(const struct media_session *session, TOPOID id)
 859 {
 860     struct topo_node *node;
 861
 862     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
 863     {
 864         if (node->node_id == id)
 865             return node;
 866     }
 867
 868     return NULL;
 869 }
 870
 871 static void session_command_complete(struct media_session *session)
 872 {
 873     struct session_op *op;
 874     struct list *e;
 875
 876     session->presentation.flags &= ~SESSION_FLAG_PENDING_COMMAND;
 877
 878     /* Submit next command. */
 879     if ((e = list_head(&session->commands)))
 880     {
 881         op = LIST_ENTRY(e, struct session_op, entry);
 882         MFPutWorkItem(MFASYNC_CALLBACK_QUEUE_STANDARD, &session->commands_callback, &op->IUnknown_iface);
 883     }
 884 }
 885
 886 static void session_command_complete_with_event(struct media_session *session, MediaEventType event,
 887         HRESULT status, const PROPVARIANT *param)
 888 {
 889     IMFMediaEventQueue_QueueEventParamVar(session->event_queue, event, &GUID_NULL, status, param);
 890     session_command_complete(session);
 891 }
 892
 893 static HRESULT session_subscribe_sources(struct media_session *session)
 894 {
 895     struct media_source *source;
 896     HRESULT hr = S_OK;
 897
 898     if (session->presentation.flags & SESSION_FLAG_SOURCES_SUBSCRIBED)
 899         return hr;
 900
 901     LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
 902     {
 903         if (FAILED(hr = IMFMediaSource_BeginGetEvent(source->source, &session->events_callback,
 904                 source->object)))
 905         {
 906             WARN("Failed to subscribe to source events, hr %#lx.\n", hr);
 907             return hr;
 908         }
 909     }
 910
 911     session->presentation.flags |= SESSION_FLAG_SOURCES_SUBSCRIBED;
 912     return hr;
 913 }
 914
 915 static void session_start(struct media_session *session, const GUID *time_format, const PROPVARIANT *start_position)
 916 {
 917     struct media_source *source;
 918     struct topo_node *topo_node;
 919     HRESULT hr;
 920     UINT i;
 921
 922     switch (session->state)
 923     {
 924         case SESSION_STATE_STOPPED:
 925
 926             /* Start request with no current topology. */
 927             if (session->presentation.topo_status == MF_TOPOSTATUS_INVALID)
 928             {
 929                 session_command_complete_with_event(session, MESessionStarted, MF_E_INVALIDREQUEST, NULL);
 930                 break;
 931             }
 932
 933             /* fallthrough */
 934         case SESSION_STATE_PAUSED:
 935
 936             session->presentation.time_format = *time_format;
 937             session->presentation.start_position.vt = VT_EMPTY;
 938             PropVariantCopy(&session->presentation.start_position, start_position);
 939
 940             if (FAILED(hr = session_subscribe_sources(session)))
 941             {
 942                 session_command_complete_with_event(session, MESessionStarted, hr, NULL);
 943                 return;
 944             }
 945
 946             LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
 947             {
 948                 if (FAILED(hr = IMFMediaSource_Start(source->source, source->pd, &GUID_NULL, start_position)))
 949                 {
 950                     WARN("Failed to start media source %p, hr %#lx.\n", source->source, hr);
 951                     session_command_complete_with_event(session, MESessionStarted, hr, NULL);
 952                     return;
 953                 }
 954             }
 955
 956             LIST_FOR_EACH_ENTRY(topo_node, &session->presentation.nodes, struct topo_node, entry)
 957             {
 958                 if (topo_node->type == MF_TOPOLOGY_TRANSFORM_NODE)
 959                 {
 960                     for (i = 0; i < topo_node->u.transform.input_count; i++)
 961                     {
 962                         struct transform_stream *stream = &topo_node->u.transform.inputs[i];
 963                         stream->draining = FALSE;
 964                     }
 965                 }
 966             }
 967
 968             session->state = SESSION_STATE_STARTING_SOURCES;
 969             break;
 970         case SESSION_STATE_STARTED:
 971             FIXME("Seeking is not implemented.\n");
 972             session_command_complete(session);
 973             break;
 974         default:
 975             session_command_complete_with_event(session, MESessionStarted, MF_E_INVALIDREQUEST, NULL);
 976             break;
 977     }
 978 }
 979
 980 static void session_set_started(struct media_session *session)
 981 {
 982     struct media_source *source;
 983     IMFMediaEvent *event;
 984     unsigned int caps;
 985     DWORD flags;
 986
 987     session->state = SESSION_STATE_STARTED;
 988
 989     caps = session->caps | MFSESSIONCAP_PAUSE;
 990
 991     LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
 992     {
 993         if (SUCCEEDED(IMFMediaSource_GetCharacteristics(source->source, &flags)))
 994         {
 995             if (!(flags & MFMEDIASOURCE_CAN_PAUSE))
 996             {
 997                 caps &= ~MFSESSIONCAP_PAUSE;
 998                 break;
 999             }
1000         }
1001     }
1002
1003     session_set_caps(session, caps);
1004
1005     if (SUCCEEDED(MFCreateMediaEvent(MESessionStarted, &GUID_NULL, S_OK, NULL, &event)))
1006     {
1007         IMFMediaEvent_SetUINT64(event, &MF_EVENT_PRESENTATION_TIME_OFFSET, 0);
1008         IMFMediaEventQueue_QueueEvent(session->event_queue, event);
1009         IMFMediaEvent_Release(event);
1010     }
1011     session_command_complete(session);
1012 }
1013
1014 static void session_set_paused(struct media_session *session, unsigned int state, HRESULT status)
1015 {
1016     /* Failed event status could indicate a failure during normal transition to paused state,
1017        or an attempt to pause from invalid initial state. To finalize failed transition in the former case,
1018        state is still forced to PAUSED, otherwise previous state is retained. */
1019     if (state != ~0u) session->state = state;
1020     if (SUCCEEDED(status))
1021         session_set_caps(session, session->caps & ~MFSESSIONCAP_PAUSE);
1022     session_command_complete_with_event(session, MESessionPaused, status, NULL);
1023 }
1024
1025 static void session_set_closed(struct media_session *session, HRESULT status)
1026 {
1027     session->state = SESSION_STATE_CLOSED;
1028     if (SUCCEEDED(status))
1029         session_set_caps(session, session->caps & ~(MFSESSIONCAP_START | MFSESSIONCAP_SEEK));
1030     session_command_complete_with_event(session, MESessionClosed, status, NULL);
1031 }
1032
1033 static void session_pause(struct media_session *session)
1034 {
1035     unsigned int state = ~0u;
1036     HRESULT hr;
1037
1038     switch (session->state)
1039     {
1040         case SESSION_STATE_STARTED:
1041
1042             /* Transition in two steps - pause the clock, wait for sinks, then pause sources. */
1043             if (SUCCEEDED(hr = IMFPresentationClock_Pause(session->clock)))
1044                 session->state = SESSION_STATE_PAUSING_SINKS;
1045             state = SESSION_STATE_PAUSED;
1046
1047             break;
1048
1049         case SESSION_STATE_STOPPED:
1050             hr = MF_E_SESSION_PAUSEWHILESTOPPED;
1051             break;
1052         default:
1053             hr = MF_E_INVALIDREQUEST;
1054     }
1055
1056     if (FAILED(hr))
1057         session_set_paused(session, state, hr);
1058 }
1059
1060 static void session_clear_end_of_presentation(struct media_session *session)
1061 {
1062     struct media_source *source;
1063     struct topo_node *node;
1064
1065     session->presentation.flags &= ~SESSION_FLAG_END_OF_PRESENTATION;
1066     LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
1067     {
1068         source->flags &= ~SOURCE_FLAG_END_OF_PRESENTATION;
1069     }
1070     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
1071     {
1072         node->flags &= ~TOPO_NODE_END_OF_STREAM;
1073     }
1074     session->presentation.topo_status = MF_TOPOSTATUS_READY;
1075 }
1076
1077 static void session_set_stopped(struct media_session *session, HRESULT status)
1078 {
1079     MediaEventType event_type;
1080     IMFMediaEvent *event;
1081
1082     session->state = SESSION_STATE_STOPPED;
1083     event_type = session->presentation.flags & SESSION_FLAG_END_OF_PRESENTATION ? MESessionEnded : MESessionStopped;
1084
1085     if (SUCCEEDED(MFCreateMediaEvent(event_type, &GUID_NULL, status, NULL, &event)))
1086     {
1087         IMFMediaEvent_SetUINT64(event, &MF_SESSION_APPROX_EVENT_OCCURRENCE_TIME, session->presentation.clock_stop_time);
1088         IMFMediaEventQueue_QueueEvent(session->event_queue, event);
1089         IMFMediaEvent_Release(event);
1090     }
1091     session_clear_end_of_presentation(session);
1092     session_command_complete(session);
1093 }
1094
1095 static void session_stop(struct media_session *session)
1096 {
1097     HRESULT hr = MF_E_INVALIDREQUEST;
1098
1099     switch (session->state)
1100     {
1101         case SESSION_STATE_STARTED:
1102         case SESSION_STATE_PAUSED:
1103
1104             /* Transition in two steps - stop the clock, wait for sinks, then stop sources. */
1105             IMFPresentationClock_GetTime(session->clock, &session->presentation.clock_stop_time);
1106             if (SUCCEEDED(hr = IMFPresentationClock_Stop(session->clock)))
1107                 session->state = SESSION_STATE_STOPPING_SINKS;
1108             else
1109                 session_set_stopped(session, hr);
1110
1111             break;
1112         case SESSION_STATE_STOPPED:
1113             hr = S_OK;
1114             /* fallthrough */
1115         default:
1116             session_command_complete_with_event(session, MESessionStopped, hr, NULL);
1117             break;
1118     }
1119 }
1120
1121 static HRESULT session_finalize_sinks(struct media_session *session)
1122 {
1123     IMFFinalizableMediaSink *fin_sink;
1124     BOOL sinks_finalized = TRUE;
1125     struct media_sink *sink;
1126     HRESULT hr = S_OK;
1127
1128     session->presentation.flags &= ~SESSION_FLAG_FINALIZE_SINKS;
1129     session->state = SESSION_STATE_FINALIZING_SINKS;
1130
1131     LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
1132     {
1133         if (SUCCEEDED(IMFMediaSink_QueryInterface(sink->sink, &IID_IMFFinalizableMediaSink, (void **)&fin_sink)))
1134         {
1135             hr = IMFFinalizableMediaSink_BeginFinalize(fin_sink, &session->sink_finalizer_callback,
1136                     (IUnknown *)fin_sink);
1137             IMFFinalizableMediaSink_Release(fin_sink);
1138             if (FAILED(hr))
1139                 break;
1140             sinks_finalized = FALSE;
1141         }
1142         else
1143             sink->finalized = TRUE;
1144     }
1145
1146     if (sinks_finalized)
1147         session_set_closed(session, hr);
1148
1149     return hr;
1150 }
1151
1152 static void session_close(struct media_session *session)
1153 {
1154     HRESULT hr = S_OK;
1155
1156     switch (session->state)
1157     {
1158         case SESSION_STATE_STOPPED:
1159             hr = session_finalize_sinks(session);
1160             break;
1161         case SESSION_STATE_STARTED:
1162         case SESSION_STATE_PAUSED:
1163             session->presentation.flags |= SESSION_FLAG_FINALIZE_SINKS;
1164             if (SUCCEEDED(hr = IMFPresentationClock_Stop(session->clock)))
1165                 session->state = SESSION_STATE_STOPPING_SINKS;
1166             break;
1167         default:
1168             hr = MF_E_INVALIDREQUEST;
1169             break;
1170     }
1171
1172     session_clear_queued_topologies(session);
1173     if (FAILED(hr))
1174         session_set_closed(session, hr);
1175 }
1176
1177 static void session_clear_topologies(struct media_session *session)
1178 {
1179     HRESULT hr = S_OK;
1180
1181     if (session->state == SESSION_STATE_CLOSED)
1182         hr = MF_E_INVALIDREQUEST;
1183     else
1184         session_clear_queued_topologies(session);
1185     session_command_complete_with_event(session, MESessionTopologiesCleared, hr, NULL);
1186 }
1187
1188 static HRESULT session_is_presentation_rate_supported(struct media_session *session, BOOL thin, float rate,
1189         float *nearest_rate)
1190 {
1191     IMFRateSupport *rate_support;
1192     struct media_source *source;
1193     struct media_sink *sink;
1194     float value = 0.0f, tmp;
1195     HRESULT hr = S_OK;
1196     DWORD flags;
1197
1198     if (!nearest_rate) nearest_rate = &tmp;
1199
1200     if (rate == 0.0f)
1201     {
1202         *nearest_rate = 1.0f;
1203         return S_OK;
1204     }
1205
1206     if (session->presentation.topo_status != MF_TOPOSTATUS_INVALID)
1207     {
1208         LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
1209         {
1210             if (FAILED(hr = MFGetService(source->object, &MF_RATE_CONTROL_SERVICE, &IID_IMFRateSupport,
1211                     (void **)&rate_support)))
1212             {
1213                 value = 1.0f;
1214                 break;
1215             }
1216
1217             value = rate;
1218             if (FAILED(hr = IMFRateSupport_IsRateSupported(rate_support, thin, rate, &value)))
1219                 WARN("Source does not support rate %f, hr %#lx.\n", rate, hr);
1220             IMFRateSupport_Release(rate_support);
1221
1222             /* Only "first" source is considered. */
1223             break;
1224         }
1225
1226         if (SUCCEEDED(hr))
1227         {
1228             /* For sinks only check if rate is supported, ignoring nearest values. */
1229             LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
1230             {
1231                 flags = 0;
1232                 if (FAILED(hr = IMFMediaSink_GetCharacteristics(sink->sink, &flags)))
1233                     break;
1234
1235                 if (flags & MEDIASINK_RATELESS)
1236                     continue;
1237
1238                 if (FAILED(MFGetService(sink->object, &MF_RATE_CONTROL_SERVICE, &IID_IMFRateSupport,
1239                         (void **)&rate_support)))
1240                     continue;
1241
1242                 hr = IMFRateSupport_IsRateSupported(rate_support, thin, rate, NULL);
1243                 IMFRateSupport_Release(rate_support);
1244                 if (FAILED(hr))
1245                 {
1246                     WARN("Sink %p does not support rate %f, hr %#lx.\n", sink->sink, rate, hr);
1247                     break;
1248                 }
1249             }
1250         }
1251     }
1252
1253     *nearest_rate = value;
1254
1255     return hr;
1256 }
1257
1258 static void session_set_consumed_clock(IUnknown *object, IMFPresentationClock *clock)
1259 {
1260     IMFClockConsumer *consumer;
1261
1262     if (SUCCEEDED(IUnknown_QueryInterface(object, &IID_IMFClockConsumer, (void **)&consumer)))
1263     {
1264         IMFClockConsumer_SetPresentationClock(consumer, clock);
1265         IMFClockConsumer_Release(consumer);
1266     }
1267 }
1268
1269 static void session_set_presentation_clock(struct media_session *session)
1270 {
1271     IMFPresentationTimeSource *time_source = NULL;
1272     struct media_source *source;
1273     struct media_sink *sink;
1274     struct topo_node *node;
1275     HRESULT hr;
1276
1277     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
1278     {
1279         if (node->type == MF_TOPOLOGY_TRANSFORM_NODE)
1280             IMFTransform_ProcessMessage(node->object.transform, MFT_MESSAGE_NOTIFY_START_OF_STREAM, 0);
1281     }
1282
1283     if (!(session->presentation.flags & SESSION_FLAG_PRESENTATION_CLOCK_SET))
1284     {
1285         /* Attempt to get time source from the sinks. */
1286         LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
1287         {
1288             if (SUCCEEDED(IMFMediaSink_QueryInterface(sink->sink, &IID_IMFPresentationTimeSource,
1289                     (void **)&time_source)))
1290                  break;
1291         }
1292
1293         if (time_source)
1294         {
1295             hr = IMFPresentationClock_SetTimeSource(session->clock, time_source);
1296             IMFPresentationTimeSource_Release(time_source);
1297         }
1298         else
1299             hr = IMFPresentationClock_SetTimeSource(session->clock, session->system_time_source);
1300
1301         if (FAILED(hr))
1302             WARN("Failed to set time source, hr %#lx.\n", hr);
1303
1304         LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
1305         {
1306             if (node->type != MF_TOPOLOGY_OUTPUT_NODE)
1307                 continue;
1308
1309             if (FAILED(hr = IMFStreamSink_BeginGetEvent(node->object.sink_stream, &session->events_callback,
1310                     node->object.object)))
1311             {
1312                 WARN("Failed to subscribe to stream sink events, hr %#lx.\n", hr);
1313             }
1314         }
1315
1316         /* Set clock for all topology nodes. */
1317         LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
1318         {
1319             session_set_consumed_clock(source->object, session->clock);
1320         }
1321
1322         LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
1323         {
1324             if (sink->event_generator && FAILED(hr = IMFMediaEventGenerator_BeginGetEvent(sink->event_generator,
1325                     &session->events_callback, (IUnknown *)sink->event_generator)))
1326             {
1327                 WARN("Failed to subscribe to sink events, hr %#lx.\n", hr);
1328             }
1329
1330             if (FAILED(hr = IMFMediaSink_SetPresentationClock(sink->sink, session->clock)))
1331                 WARN("Failed to set presentation clock for the sink, hr %#lx.\n", hr);
1332         }
1333
1334         LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
1335         {
1336             if (node->type != MF_TOPOLOGY_TRANSFORM_NODE)
1337                 continue;
1338
1339             session_set_consumed_clock(node->object.object, session->clock);
1340         }
1341
1342         session->presentation.flags |= SESSION_FLAG_PRESENTATION_CLOCK_SET;
1343     }
1344 }
1345
1346 static void session_set_rate(struct media_session *session, BOOL thin, float rate)
1347 {
1348     IMFRateControl *rate_control;
1349     struct media_source *source;
1350     float clock_rate = 0.0f;
1351     PROPVARIANT param;
1352     HRESULT hr;
1353
1354     hr = session_is_presentation_rate_supported(session, thin, rate, NULL);
1355
1356     if (SUCCEEDED(hr))
1357         hr = IMFRateControl_GetRate(session->clock_rate_control, NULL, &clock_rate);
1358
1359     if (SUCCEEDED(hr) && (rate != clock_rate) && SUCCEEDED(hr = session_subscribe_sources(session)))
1360     {
1361         LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
1362         {
1363             if (SUCCEEDED(hr = MFGetService(source->object, &MF_RATE_CONTROL_SERVICE, &IID_IMFRateControl,
1364                     (void **)&rate_control)))
1365             {
1366                 hr = IMFRateControl_SetRate(rate_control, thin, rate);
1367                 IMFRateControl_Release(rate_control);
1368                 if (SUCCEEDED(hr))
1369                 {
1370                     session->presentation.flags |= SESSION_FLAG_PENDING_RATE_CHANGE;
1371                     session->presentation.rate = rate;
1372                     return;
1373                 }
1374             }
1375
1376             break;
1377         }
1378     }
1379
1380     param.vt = VT_R4;
1381     param.fltVal = rate;
1382     session_command_complete_with_event(session, MESessionRateChanged, hr, SUCCEEDED(hr) ? &param : NULL);
1383 }
1384
1385 static void session_complete_rate_change(struct media_session *session)
1386 {
1387     PROPVARIANT param;
1388     HRESULT hr;
1389
1390     if (!(session->presentation.flags & SESSION_FLAG_PENDING_RATE_CHANGE))
1391         return;
1392
1393     session->presentation.flags &= ~SESSION_FLAG_PENDING_RATE_CHANGE;
1394     session_set_presentation_clock(session);
1395
1396     hr = IMFRateControl_SetRate(session->clock_rate_control, session->presentation.thin,
1397             session->presentation.rate);
1398
1399     param.vt = VT_R4;
1400     param.fltVal = session->presentation.rate;
1401
1402     IMFMediaEventQueue_QueueEventParamVar(session->event_queue, MESessionRateChanged, &GUID_NULL, hr,
1403             SUCCEEDED(hr) ? &param : NULL);
1404     session_command_complete(session);
1405 }
1406
1407 static struct media_source *session_get_media_source(struct media_session *session, IMFMediaSource *source)
1408 {
1409     struct media_source *cur;
1410
1411     LIST_FOR_EACH_ENTRY(cur, &session->presentation.sources, struct media_source, entry)
1412     {
1413         if (source == cur->source)
1414             return cur;
1415     }
1416
1417     return NULL;
1418 }
1419
1420 static void session_release_media_source(struct media_source *source)
1421 {
1422     IMFMediaSource_Release(source->source);
1423     if (source->pd)
1424         IMFPresentationDescriptor_Release(source->pd);
1425     free(source);
1426 }
1427
1428 static HRESULT session_add_media_source(struct media_session *session, IMFTopologyNode *node, IMFMediaSource *source)
1429 {
1430     struct media_source *media_source;
1431     HRESULT hr;
1432
1433     if (session_get_media_source(session, source))
1434         return S_FALSE;
1435
1436     if (!(media_source = calloc(1, sizeof(*media_source))))
1437         return E_OUTOFMEMORY;
1438
1439     media_source->source = source;
1440     IMFMediaSource_AddRef(media_source->source);
1441
1442     hr = IMFTopologyNode_GetUnknown(node, &MF_TOPONODE_PRESENTATION_DESCRIPTOR, &IID_IMFPresentationDescriptor,
1443             (void **)&media_source->pd);
1444
1445     if (SUCCEEDED(hr))
1446         list_add_tail(&session->presentation.sources, &media_source->entry);
1447     else
1448         session_release_media_source(media_source);
1449
1450     return hr;
1451 }
1452
1453 static void session_raise_topology_set(struct media_session *session, IMFTopology *topology, HRESULT status)
1454 {
1455     PROPVARIANT param;
1456
1457     param.vt = topology ? VT_UNKNOWN : VT_EMPTY;
1458     param.punkVal = (IUnknown *)topology;
1459
1460     IMFMediaEventQueue_QueueEventParamVar(session->event_queue, MESessionTopologySet, &GUID_NULL, status, &param);
1461 }
1462
1463 static DWORD session_get_object_rate_caps(IUnknown *object)
1464 {
1465     IMFRateSupport *rate_support;
1466     DWORD caps = 0;
1467     float rate;
1468
1469     if (SUCCEEDED(MFGetService(object, &MF_RATE_CONTROL_SERVICE, &IID_IMFRateSupport, (void **)&rate_support)))
1470     {
1471         rate = 0.0f;
1472         if (SUCCEEDED(IMFRateSupport_GetFastestRate(rate_support, MFRATE_FORWARD, TRUE, &rate)) && rate != 0.0f)
1473             caps |= MFSESSIONCAP_RATE_FORWARD;
1474
1475         rate = 0.0f;
1476         if (SUCCEEDED(IMFRateSupport_GetFastestRate(rate_support, MFRATE_REVERSE, TRUE, &rate)) && rate != 0.0f)
1477             caps |= MFSESSIONCAP_RATE_REVERSE;
1478
1479         IMFRateSupport_Release(rate_support);
1480     }
1481
1482     return caps;
1483 }
1484
1485 static HRESULT session_add_media_sink(struct media_session *session, IMFTopologyNode *node, IMFMediaSink *sink)
1486 {
1487     struct media_sink *media_sink;
1488     unsigned int disable_preroll = 0;
1489     DWORD flags;
1490
1491     LIST_FOR_EACH_ENTRY(media_sink, &session->presentation.sinks, struct media_sink, entry)
1492     {
1493         if (sink == media_sink->sink)
1494             return S_FALSE;
1495     }
1496
1497     if (!(media_sink = calloc(1, sizeof(*media_sink))))
1498         return E_OUTOFMEMORY;
1499
1500     media_sink->sink = sink;
1501     IMFMediaSink_AddRef(media_sink->sink);
1502
1503     IMFMediaSink_QueryInterface(media_sink->sink, &IID_IMFMediaEventGenerator, (void **)&media_sink->event_generator);
1504
1505     IMFTopologyNode_GetUINT32(node, &MF_TOPONODE_DISABLE_PREROLL, &disable_preroll);
1506     if (SUCCEEDED(IMFMediaSink_GetCharacteristics(sink, &flags)) && flags & MEDIASINK_CAN_PREROLL && !disable_preroll)
1507     {
1508         if (SUCCEEDED(IMFMediaSink_QueryInterface(media_sink->sink, &IID_IMFMediaSinkPreroll, (void **)&media_sink->preroll)))
1509             session->presentation.flags |= SESSION_FLAG_NEEDS_PREROLL;
1510     }
1511
1512     list_add_tail(&session->presentation.sinks, &media_sink->entry);
1513
1514     return S_OK;
1515 }
1516
1517 static DWORD transform_node_get_stream_id(struct topo_node *node, BOOL output, unsigned int index)
1518 {
1519     DWORD *map = output ? node->u.transform.output_map : node->u.transform.input_map;
1520     return map ? map[index] : index;
1521 }
1522
1523 static HRESULT session_set_transform_stream_info(struct topo_node *node)
1524 {
1525     DWORD *input_map = NULL, *output_map = NULL;
1526     DWORD i, input_count, output_count;
1527     struct transform_stream *streams;
1528     unsigned int block_alignment;
1529     IMFMediaType *media_type;
1530     UINT32 bytes_per_second;
1531     GUID major = { 0 };
1532     HRESULT hr;
1533
1534     hr = IMFTransform_GetStreamCount(node->object.transform, &input_count, &output_count);
1535     if (SUCCEEDED(hr) && (input_count > 1 || output_count > 1))
1536     {
1537         input_map = calloc(input_count, sizeof(*input_map));
1538         output_map = calloc(output_count, sizeof(*output_map));
1539         if (FAILED(IMFTransform_GetStreamIDs(node->object.transform, input_count, input_map,
1540                 output_count, output_map)))
1541         {
1542             /* Assume sequential identifiers. */
1543             free(input_map);
1544             free(output_map);
1545             input_map = output_map = NULL;
1546         }
1547     }
1548
1549     if (SUCCEEDED(hr))
1550     {
1551         node->u.transform.input_map = input_map;
1552         node->u.transform.output_map = output_map;
1553
1554         streams = calloc(input_count, sizeof(*streams));
1555         for (i = 0; i < input_count; ++i)
1556             list_init(&streams[i].samples);
1557         node->u.transform.inputs = streams;
1558         node->u.transform.input_count = input_count;
1559
1560         streams = calloc(output_count, sizeof(*streams));
1561         for (i = 0; i < output_count; ++i)
1562         {
1563             list_init(&streams[i].samples);
1564
1565             if (SUCCEEDED(IMFTransform_GetOutputCurrentType(node->object.transform,
1566                     transform_node_get_stream_id(node, TRUE, i), &media_type)))
1567             {
1568                 if (SUCCEEDED(IMFMediaType_GetMajorType(media_type, &major)) && IsEqualGUID(&major, &MFMediaType_Audio)
1569                         && SUCCEEDED(IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_BLOCK_ALIGNMENT, &block_alignment)))
1570                 {
1571                     streams[i].min_buffer_size = block_alignment;
1572                     if (SUCCEEDED(IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_AVG_BYTES_PER_SECOND, &bytes_per_second)))
1573                         streams[i].min_buffer_size = max(streams[i].min_buffer_size, bytes_per_second);
1574                 }
1575                 IMFMediaType_Release(media_type);
1576             }
1577         }
1578         node->u.transform.outputs = streams;
1579         node->u.transform.output_count = output_count;
1580     }
1581
1582     return hr;
1583 }
1584
1585 static HRESULT session_get_stream_sink_type(IMFStreamSink *sink, IMFMediaType **media_type)
1586 {
1587     IMFMediaTypeHandler *handler;
1588     HRESULT hr;
1589
1590     if (SUCCEEDED(hr = IMFStreamSink_GetMediaTypeHandler(sink, &handler)))
1591     {
1592         hr = IMFMediaTypeHandler_GetCurrentMediaType(handler, media_type);
1593         IMFMediaTypeHandler_Release(handler);
1594     }
1595
1596     return hr;
1597 }
1598
1599 static HRESULT WINAPI node_sample_allocator_cb_QueryInterface(IMFVideoSampleAllocatorNotify *iface,
1600         REFIID riid, void **obj)
1601 {
1602     if (IsEqualIID(riid, &IID_IMFVideoSampleAllocatorNotify) ||
1603             IsEqualIID(riid, &IID_IUnknown))
1604     {
1605         *obj = iface;
1606         IMFVideoSampleAllocatorNotify_AddRef(iface);
1607         return S_OK;
1608     }
1609
1610     *obj = NULL;
1611     return E_NOINTERFACE;
1612 }
1613
1614 static ULONG WINAPI node_sample_allocator_cb_AddRef(IMFVideoSampleAllocatorNotify *iface)
1615 {
1616     return 2;
1617 }
1618
1619 static ULONG WINAPI node_sample_allocator_cb_Release(IMFVideoSampleAllocatorNotify *iface)
1620 {
1621     return 1;
1622 }
1623
1624 static HRESULT session_request_sample_from_node(struct media_session *session, IMFTopologyNode *node, DWORD output);
1625
1626 static HRESULT WINAPI node_sample_allocator_cb_NotifyRelease(IMFVideoSampleAllocatorNotify *iface)
1627 {
1628     struct topo_node *topo_node = impl_node_from_IMFVideoSampleAllocatorNotify(iface);
1629     MFPutWorkItem(MFASYNC_CALLBACK_QUEUE_STANDARD, &topo_node->session->sa_ready_callback, (IUnknown *)iface);
1630     return S_OK;
1631 }
1632
1633 static const IMFVideoSampleAllocatorNotifyVtbl node_sample_allocator_cb_vtbl =
1634 {
1635     node_sample_allocator_cb_QueryInterface,
1636     node_sample_allocator_cb_AddRef,
1637     node_sample_allocator_cb_Release,
1638     node_sample_allocator_cb_NotifyRelease,
1639 };
1640
1641 static HRESULT session_append_node(struct media_session *session, IMFTopologyNode *node)
1642 {
1643     struct topo_node *topo_node;
1644     IMFMediaSink *media_sink;
1645     IMFMediaType *media_type;
1646     IMFStreamDescriptor *sd;
1647     HRESULT hr = S_OK;
1648
1649     if (!(topo_node = calloc(1, sizeof(*topo_node))))
1650         return E_OUTOFMEMORY;
1651
1652     IMFTopologyNode_GetNodeType(node, &topo_node->type);
1653     IMFTopologyNode_GetTopoNodeID(node, &topo_node->node_id);
1654     topo_node->node = node;
1655     IMFTopologyNode_AddRef(topo_node->node);
1656     topo_node->session = session;
1657
1658     switch (topo_node->type)
1659     {
1660         case MF_TOPOLOGY_OUTPUT_NODE:
1661             topo_node->u.sink.notify_cb.lpVtbl = &node_sample_allocator_cb_vtbl;
1662
1663             if (FAILED(hr = topology_node_get_object(node, &IID_IMFStreamSink, (void **)&topo_node->object.object)))
1664             {
1665                 WARN("Failed to get stream sink interface, hr %#lx.\n", hr);
1666                 break;
1667             }
1668
1669             if (FAILED(hr = IMFStreamSink_GetMediaSink(topo_node->object.sink_stream, &media_sink)))
1670                 break;
1671
1672             if (SUCCEEDED(hr = session_add_media_sink(session, node, media_sink)))
1673             {
1674                 if (SUCCEEDED(session_get_stream_sink_type(topo_node->object.sink_stream, &media_type)))
1675                 {
1676                     if (SUCCEEDED(MFGetService(topo_node->object.object, &MR_VIDEO_ACCELERATION_SERVICE,
1677                         &IID_IMFVideoSampleAllocator, (void **)&topo_node->u.sink.allocator)))
1678                     {
1679                         if (FAILED(hr = IMFVideoSampleAllocator_InitializeSampleAllocator(topo_node->u.sink.allocator,
1680                                 2, media_type)))
1681                         {
1682                             WARN("Failed to initialize sample allocator for the stream, hr %#lx.\n", hr);
1683                         }
1684                         IMFVideoSampleAllocator_QueryInterface(topo_node->u.sink.allocator,
1685                                 &IID_IMFVideoSampleAllocatorCallback, (void **)&topo_node->u.sink.allocator_cb);
1686                         IMFVideoSampleAllocatorCallback_SetCallback(topo_node->u.sink.allocator_cb,
1687                                 &topo_node->u.sink.notify_cb);
1688                     }
1689                     IMFMediaType_Release(media_type);
1690                 }
1691             }
1692             IMFMediaSink_Release(media_sink);
1693
1694             break;
1695         case MF_TOPOLOGY_SOURCESTREAM_NODE:
1696             if (FAILED(IMFTopologyNode_GetUnknown(node, &MF_TOPONODE_SOURCE, &IID_IMFMediaSource,
1697                     (void **)&topo_node->u.source.source)))
1698             {
1699                 WARN("Missing MF_TOPONODE_SOURCE, hr %#lx.\n", hr);
1700                 break;
1701             }
1702
1703             if (FAILED(hr = session_add_media_source(session, node, topo_node->u.source.source)))
1704                 break;
1705
1706             if (FAILED(hr = IMFTopologyNode_GetUnknown(node, &MF_TOPONODE_STREAM_DESCRIPTOR,
1707                     &IID_IMFStreamDescriptor, (void **)&sd)))
1708             {
1709                 WARN("Missing MF_TOPONODE_STREAM_DESCRIPTOR, hr %#lx.\n", hr);
1710                 break;
1711             }
1712
1713             hr = IMFStreamDescriptor_GetStreamIdentifier(sd, &topo_node->u.source.stream_id);
1714             IMFStreamDescriptor_Release(sd);
1715
1716             break;
1717         case MF_TOPOLOGY_TRANSFORM_NODE:
1718
1719             if (SUCCEEDED(hr = topology_node_get_object(node, &IID_IMFTransform, (void **)&topo_node->object.transform)))
1720             {
1721                 hr = session_set_transform_stream_info(topo_node);
1722             }
1723             else
1724                 WARN("Failed to get IMFTransform for MFT node, hr %#lx.\n", hr);
1725
1726             break;
1727         case MF_TOPOLOGY_TEE_NODE:
1728             FIXME("Unsupported node type %d.\n", topo_node->type);
1729
1730             break;
1731         default:
1732             ;
1733     }
1734
1735     if (SUCCEEDED(hr))
1736         list_add_tail(&session->presentation.nodes, &topo_node->entry);
1737     else
1738         release_topo_node(topo_node);
1739
1740     return hr;
1741 }
1742
1743 static HRESULT session_collect_nodes(struct media_session *session)
1744 {
1745     IMFTopology *topology = session->presentation.current_topology;
1746     IMFTopologyNode *node;
1747     WORD i, count = 0;
1748     HRESULT hr;
1749
1750     if (!list_empty(&session->presentation.nodes))
1751         return S_OK;
1752
1753     if (FAILED(hr = IMFTopology_GetNodeCount(topology, &count)))
1754         return hr;
1755
1756     for (i = 0; i < count; ++i)
1757     {
1758         if (FAILED(hr = IMFTopology_GetNode(topology, i, &node)))
1759         {
1760             WARN("Failed to get node %u.\n", i);
1761             break;
1762         }
1763
1764         hr = session_append_node(session, node);
1765         IMFTopologyNode_Release(node);
1766         if (FAILED(hr))
1767         {
1768             WARN("Failed to add node %u.\n", i);
1769             break;
1770         }
1771     }
1772
1773     return hr;
1774 }
1775
1776 static HRESULT session_set_current_topology(struct media_session *session, IMFTopology *topology)
1777 {
1778     struct media_source *source;
1779     DWORD caps, object_flags;
1780     struct media_sink *sink;
1781     struct topo_node *node;
1782     IMFMediaEvent *event;
1783     HRESULT hr;
1784
1785     if (FAILED(hr = IMFTopology_CloneFrom(session->presentation.current_topology, topology)))
1786     {
1787         WARN("Failed to clone topology, hr %#lx.\n", hr);
1788         return hr;
1789     }
1790
1791     session_collect_nodes(session);
1792
1793     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
1794     {
1795         if (node->type == MF_TOPOLOGY_TRANSFORM_NODE)
1796         {
1797             if (FAILED(hr = IMFTransform_ProcessMessage(node->object.transform,
1798                     MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, 0)))
1799                 return hr;
1800         }
1801     }
1802
1803     /* FIXME: attributes are all zero for now */
1804     if (SUCCEEDED(MFCreateMediaEvent(MESessionNotifyPresentationTime, &GUID_NULL, S_OK, NULL, &event)))
1805     {
1806         IMFMediaEvent_SetUINT64(event, &MF_EVENT_START_PRESENTATION_TIME, 0);
1807         IMFMediaEvent_SetUINT64(event, &MF_EVENT_PRESENTATION_TIME_OFFSET, 0);
1808         IMFMediaEvent_SetUINT64(event, &MF_EVENT_START_PRESENTATION_TIME_AT_OUTPUT, 0);
1809
1810         IMFMediaEventQueue_QueueEvent(session->event_queue, event);
1811         IMFMediaEvent_Release(event);
1812     }
1813
1814     /* Update session caps. */
1815     caps = MFSESSIONCAP_START | MFSESSIONCAP_SEEK | MFSESSIONCAP_RATE_FORWARD | MFSESSIONCAP_RATE_REVERSE |
1816             MFSESSIONCAP_DOES_NOT_USE_NETWORK;
1817
1818     LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
1819     {
1820         if (!caps)
1821             break;
1822
1823         object_flags = 0;
1824         if (SUCCEEDED(IMFMediaSource_GetCharacteristics(source->source, &object_flags)))
1825         {
1826             if (!(object_flags & MFMEDIASOURCE_DOES_NOT_USE_NETWORK))
1827                 caps &= ~MFSESSIONCAP_DOES_NOT_USE_NETWORK;
1828             if (!(object_flags & MFMEDIASOURCE_CAN_SEEK))
1829                 caps &= ~MFSESSIONCAP_SEEK;
1830         }
1831
1832         /* Mask unsupported rate caps. */
1833
1834         caps &= session_get_object_rate_caps(source->object)
1835                 | ~(MFSESSIONCAP_RATE_FORWARD | MFSESSIONCAP_RATE_REVERSE);
1836     }
1837
1838     LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
1839     {
1840         if (!caps)
1841             break;
1842
1843         object_flags = 0;
1844         if (SUCCEEDED(IMFMediaSink_GetCharacteristics(sink->sink, &object_flags)))
1845         {
1846             if (!(object_flags & MEDIASINK_RATELESS))
1847                 caps &= session_get_object_rate_caps(sink->object)
1848                         | ~(MFSESSIONCAP_RATE_FORWARD | MFSESSIONCAP_RATE_REVERSE);
1849         }
1850     }
1851
1852     session_set_caps(session, caps);
1853
1854     return S_OK;
1855 }
1856
1857 static void session_set_topology(struct media_session *session, DWORD flags, IMFTopology *topology)
1858 {
1859     IMFTopology *resolved_topology = NULL;
1860     HRESULT hr = S_OK;
1861
1862     /* Resolve unless claimed to be full. */
1863     if (!(flags & MFSESSION_SETTOPOLOGY_CLEAR_CURRENT) && topology)
1864     {
1865         if (!(flags & MFSESSION_SETTOPOLOGY_NORESOLUTION))
1866         {
1867             hr = session_bind_output_nodes(topology);
1868
1869             if (SUCCEEDED(hr))
1870                 hr = IMFTopoLoader_Load(session->topo_loader, topology, &resolved_topology, NULL /* FIXME? */);
1871             if (SUCCEEDED(hr))
1872                 hr = session_init_media_types(resolved_topology);
1873
1874             if (SUCCEEDED(hr))
1875             {
1876                 topology = resolved_topology;
1877             }
1878         }
1879     }
1880
1881     if (flags & MFSESSION_SETTOPOLOGY_CLEAR_CURRENT)
1882     {
1883         if ((topology && topology == session->presentation.current_topology) || !topology)
1884         {
1885             /* FIXME: stop current topology, queue next one. */
1886             session_clear_presentation(session);
1887         }
1888         else
1889             hr = S_FALSE;
1890
1891         topology = NULL;
1892     }
1893     else if (topology && flags & MFSESSION_SETTOPOLOGY_IMMEDIATE)
1894     {
1895         session_clear_queued_topologies(session);
1896         session_clear_presentation(session);
1897     }
1898
1899     session_raise_topology_set(session, topology, hr);
1900
1901     /* With no current topology set it right away, otherwise queue. */
1902     if (topology)
1903     {
1904         struct queued_topology *queued_topology;
1905
1906         if ((queued_topology = calloc(1, sizeof(*queued_topology))))
1907         {
1908             queued_topology->topology = topology;
1909             IMFTopology_AddRef(queued_topology->topology);
1910
1911             list_add_tail(&session->topologies, &queued_topology->entry);
1912         }
1913
1914         if (session->presentation.topo_status == MF_TOPOSTATUS_INVALID)
1915         {
1916             hr = session_set_current_topology(session, topology);
1917             session_set_topo_status(session, hr, MF_TOPOSTATUS_READY);
1918             if (session->quality_manager)
1919                 IMFQualityManager_NotifyTopology(session->quality_manager, topology);
1920         }
1921     }
1922
1923     if (resolved_topology)
1924         IMFTopology_Release(resolved_topology);
1925 }
1926
1927 static HRESULT WINAPI mfsession_QueryInterface(IMFMediaSession *iface, REFIID riid, void **out)
1928 {
1929     struct media_session *session = impl_from_IMFMediaSession(iface);
1930
1931     TRACE("%p, %s, %p.\n", iface, debugstr_guid(riid), out);
1932
1933     *out = NULL;
1934
1935     if (IsEqualIID(riid, &IID_IMFMediaSession) ||
1936             IsEqualIID(riid, &IID_IMFMediaEventGenerator) ||
1937             IsEqualIID(riid, &IID_IUnknown))
1938     {
1939         *out = &session->IMFMediaSession_iface;
1940     }
1941     else if (IsEqualIID(riid, &IID_IMFGetService))
1942     {
1943         *out = &session->IMFGetService_iface;
1944     }
1945     else if (IsEqualIID(riid, &IID_IMFRateSupport))
1946     {
1947         *out = &session->IMFRateSupport_iface;
1948     }
1949     else if (IsEqualIID(riid, &IID_IMFRateControl))
1950     {
1951         *out = &session->IMFRateControl_iface;
1952     }
1953
1954     if (*out)
1955     {
1956         IMFMediaSession_AddRef(iface);
1957         return S_OK;
1958     }
1959
1960     WARN("Unsupported interface %s.\n", debugstr_guid(riid));
1961     return E_NOINTERFACE;
1962 }
1963
1964 static ULONG WINAPI mfsession_AddRef(IMFMediaSession *iface)
1965 {
1966     struct media_session *session = impl_from_IMFMediaSession(iface);
1967     ULONG refcount = InterlockedIncrement(&session->refcount);
1968
1969     TRACE("%p, refcount %lu.\n", iface, refcount);
1970
1971     return refcount;
1972 }
1973
1974 static ULONG WINAPI mfsession_Release(IMFMediaSession *iface)
1975 {
1976     struct media_session *session = impl_from_IMFMediaSession(iface);
1977     ULONG refcount = InterlockedDecrement(&session->refcount);
1978
1979     TRACE("%p, refcount %lu.\n", iface, refcount);
1980
1981     if (!refcount)
1982     {
1983         session_clear_queued_topologies(session);
1984         session_clear_presentation(session);
1985         session_clear_command_list(session);
1986         if (session->presentation.current_topology)
1987             IMFTopology_Release(session->presentation.current_topology);
1988         if (session->event_queue)
1989             IMFMediaEventQueue_Release(session->event_queue);
1990         if (session->clock)
1991             IMFPresentationClock_Release(session->clock);
1992         if (session->system_time_source)
1993             IMFPresentationTimeSource_Release(session->system_time_source);
1994         if (session->clock_rate_control)
1995             IMFRateControl_Release(session->clock_rate_control);
1996         if (session->topo_loader)
1997             IMFTopoLoader_Release(session->topo_loader);
1998         if (session->quality_manager)
1999             IMFQualityManager_Release(session->quality_manager);
2000         DeleteCriticalSection(&session->cs);
2001         free(session);
2002     }
2003
2004     return refcount;
2005 }
2006
2007 static HRESULT WINAPI mfsession_GetEvent(IMFMediaSession *iface, DWORD flags, IMFMediaEvent **event)
2008 {
2009     struct media_session *session = impl_from_IMFMediaSession(iface);
2010
2011     TRACE("%p, %#lx, %p.\n", iface, flags, event);
2012
2013     return IMFMediaEventQueue_GetEvent(session->event_queue, flags, event);
2014 }
2015
2016 static HRESULT WINAPI mfsession_BeginGetEvent(IMFMediaSession *iface, IMFAsyncCallback *callback, IUnknown *state)
2017 {
2018     struct media_session *session = impl_from_IMFMediaSession(iface);
2019
2020     TRACE("%p, %p, %p.\n", iface, callback, state);
2021
2022     return IMFMediaEventQueue_BeginGetEvent(session->event_queue, callback, state);
2023 }
2024
2025 static HRESULT WINAPI mfsession_EndGetEvent(IMFMediaSession *iface, IMFAsyncResult *result, IMFMediaEvent **event)
2026 {
2027     struct media_session *session = impl_from_IMFMediaSession(iface);
2028
2029     TRACE("%p, %p, %p.\n", iface, result, event);
2030
2031     return IMFMediaEventQueue_EndGetEvent(session->event_queue, result, event);
2032 }
2033
2034 static HRESULT WINAPI mfsession_QueueEvent(IMFMediaSession *iface, MediaEventType event_type, REFGUID ext_type,
2035         HRESULT hr, const PROPVARIANT *value)
2036 {
2037     struct media_session *session = impl_from_IMFMediaSession(iface);
2038
2039     TRACE("%p, %ld, %s, %#lx, %p.\n", iface, event_type, debugstr_guid(ext_type), hr, value);
2040
2041     return IMFMediaEventQueue_QueueEventParamVar(session->event_queue, event_type, ext_type, hr, value);
2042 }
2043
2044 static HRESULT session_check_stream_descriptor(IMFPresentationDescriptor *pd, IMFStreamDescriptor *sd)
2045 {
2046     IMFStreamDescriptor *selected_sd;
2047     DWORD i, count;
2048     BOOL selected;
2049     HRESULT hr;
2050
2051     if (FAILED(hr = IMFPresentationDescriptor_GetStreamDescriptorCount(pd, &count)))
2052     {
2053         WARN("Failed to get stream descriptor count, hr %#lx.\n", hr);
2054         return MF_E_TOPO_STREAM_DESCRIPTOR_NOT_SELECTED;
2055     }
2056
2057     for (i = 0; i < count; ++i)
2058     {
2059         if (FAILED(hr = IMFPresentationDescriptor_GetStreamDescriptorByIndex(pd, i,
2060                     &selected, &selected_sd)))
2061         {
2062             WARN("Failed to get stream descriptor %lu, hr %#lx.\n", i, hr);
2063             return MF_E_TOPO_STREAM_DESCRIPTOR_NOT_SELECTED;
2064         }
2065         IMFStreamDescriptor_Release(selected_sd);
2066
2067         if (selected_sd == sd)
2068         {
2069             if (selected)
2070                 return S_OK;
2071
2072             WARN("Presentation descriptor %p stream %p is not selected.\n", pd, sd);
2073             return MF_E_TOPO_STREAM_DESCRIPTOR_NOT_SELECTED;
2074         }
2075     }
2076
2077     WARN("Failed to find stream descriptor %lu, hr %#lx.\n", i, hr);
2078     return MF_E_TOPO_STREAM_DESCRIPTOR_NOT_SELECTED;
2079 }
2080
2081 static HRESULT session_check_topology(IMFTopology *topology)
2082 {
2083     MF_TOPOLOGY_TYPE node_type;
2084     IMFTopologyNode *node;
2085     WORD node_count, i;
2086     HRESULT hr;
2087
2088     if (!topology)
2089         return S_OK;
2090
2091     if (FAILED(IMFTopology_GetNodeCount(topology, &node_count))
2092             || node_count == 0)
2093         return E_INVALIDARG;
2094
2095     for (i = 0; i < node_count; ++i)
2096     {
2097         if (FAILED(hr = IMFTopology_GetNode(topology, i, &node)))
2098             break;
2099
2100         if (FAILED(hr = IMFTopologyNode_GetNodeType(node, &node_type)))
2101         {
2102             IMFTopologyNode_Release(node);
2103             break;
2104         }
2105
2106         switch (node_type)
2107         {
2108             case MF_TOPOLOGY_SOURCESTREAM_NODE:
2109             {
2110                 IMFPresentationDescriptor *pd;
2111                 IMFStreamDescriptor *sd;
2112                 IMFMediaSource *source;
2113
2114                 if (FAILED(hr = IMFTopologyNode_GetUnknown(node, &MF_TOPONODE_SOURCE, &IID_IMFMediaSource,
2115                         (void **)&source)))
2116                 {
2117                     WARN("Missing MF_TOPONODE_SOURCE, hr %#lx.\n", hr);
2118                     IMFTopologyNode_Release(node);
2119                     return MF_E_TOPO_MISSING_SOURCE;
2120                 }
2121                 IMFMediaSource_Release(source);
2122
2123                 if (FAILED(hr = IMFTopologyNode_GetUnknown(node, &MF_TOPONODE_PRESENTATION_DESCRIPTOR,
2124                         &IID_IMFPresentationDescriptor, (void **)&pd)))
2125                 {
2126                     WARN("Missing MF_TOPONODE_PRESENTATION_DESCRIPTOR, hr %#lx.\n", hr);
2127                     IMFTopologyNode_Release(node);
2128                     return MF_E_TOPO_MISSING_PRESENTATION_DESCRIPTOR;
2129                 }
2130
2131                 if (FAILED(hr = IMFTopologyNode_GetUnknown(node, &MF_TOPONODE_STREAM_DESCRIPTOR,
2132                         &IID_IMFStreamDescriptor, (void **)&sd)))
2133                 {
2134                     WARN("Missing MF_TOPONODE_STREAM_DESCRIPTOR, hr %#lx.\n", hr);
2135                     IMFPresentationDescriptor_Release(pd);
2136                     IMFTopologyNode_Release(node);
2137                     return MF_E_TOPO_MISSING_STREAM_DESCRIPTOR;
2138                 }
2139
2140                 hr = session_check_stream_descriptor(pd, sd);
2141                 IMFPresentationDescriptor_Release(pd);
2142                 IMFStreamDescriptor_Release(sd);
2143                 if (FAILED(hr))
2144                 {
2145                     IMFTopologyNode_Release(node);
2146                     return hr;
2147                 }
2148
2149                 break;
2150             }
2151
2152             default:
2153                 break;
2154         }
2155
2156         IMFTopologyNode_Release(node);
2157     }
2158
2159     return hr;
2160 }
2161
2162 static HRESULT WINAPI mfsession_SetTopology(IMFMediaSession *iface, DWORD flags, IMFTopology *topology)
2163 {
2164     struct media_session *session = impl_from_IMFMediaSession(iface);
2165     struct session_op *op;
2166     HRESULT hr;
2167
2168     TRACE("%p, %#lx, %p.\n", iface, flags, topology);
2169
2170     if (FAILED(hr = session_check_topology(topology)))
2171         return hr;
2172
2173     if (FAILED(hr = create_session_op(SESSION_CMD_SET_TOPOLOGY, &op)))
2174         return hr;
2175
2176     op->set_topology.flags = flags;
2177     op->set_topology.topology = topology;
2178     if (op->set_topology.topology)
2179         IMFTopology_AddRef(op->set_topology.topology);
2180
2181     hr = session_submit_command(session, op);
2182     IUnknown_Release(&op->IUnknown_iface);
2183
2184     return hr;
2185 }
2186
2187 static HRESULT WINAPI mfsession_ClearTopologies(IMFMediaSession *iface)
2188 {
2189     struct media_session *session = impl_from_IMFMediaSession(iface);
2190
2191     TRACE("%p.\n", iface);
2192
2193     return session_submit_simple_command(session, SESSION_CMD_CLEAR_TOPOLOGIES);
2194 }
2195
2196 static HRESULT WINAPI mfsession_Start(IMFMediaSession *iface, const GUID *format, const PROPVARIANT *start_position)
2197 {
2198     struct media_session *session = impl_from_IMFMediaSession(iface);
2199     struct session_op *op;
2200     HRESULT hr;
2201
2202     TRACE("%p, %s, %s.\n", iface, debugstr_guid(format), debugstr_propvar(start_position));
2203
2204     if (!start_position)
2205         return E_POINTER;
2206
2207     if (FAILED(hr = create_session_op(SESSION_CMD_START, &op)))
2208         return hr;
2209
2210     op->start.time_format = format ? *format : GUID_NULL;
2211     hr = PropVariantCopy(&op->start.start_position, start_position);
2212
2213     if (SUCCEEDED(hr))
2214         hr = session_submit_command(session, op);
2215
2216     IUnknown_Release(&op->IUnknown_iface);
2217     return hr;
2218 }
2219
2220 static HRESULT WINAPI mfsession_Pause(IMFMediaSession *iface)
2221 {
2222     struct media_session *session = impl_from_IMFMediaSession(iface);
2223
2224     TRACE("%p.\n", iface);
2225
2226     return session_submit_simple_command(session, SESSION_CMD_PAUSE);
2227 }
2228
2229 static HRESULT WINAPI mfsession_Stop(IMFMediaSession *iface)
2230 {
2231     struct media_session *session = impl_from_IMFMediaSession(iface);
2232
2233     TRACE("%p.\n", iface);
2234
2235     return session_submit_simple_command(session, SESSION_CMD_STOP);
2236 }
2237
2238 static HRESULT WINAPI mfsession_Close(IMFMediaSession *iface)
2239 {
2240     struct media_session *session = impl_from_IMFMediaSession(iface);
2241
2242     TRACE("%p.\n", iface);
2243
2244     return session_submit_simple_command(session, SESSION_CMD_CLOSE);
2245 }
2246
2247 static HRESULT WINAPI mfsession_Shutdown(IMFMediaSession *iface)
2248 {
2249     struct media_session *session = impl_from_IMFMediaSession(iface);
2250     HRESULT hr = S_OK;
2251
2252     TRACE("%p.\n", iface);
2253
2254     EnterCriticalSection(&session->cs);
2255     if (SUCCEEDED(hr = session_is_shut_down(session)))
2256     {
2257         session->state = SESSION_STATE_SHUT_DOWN;
2258         IMFMediaEventQueue_Shutdown(session->event_queue);
2259         if (session->quality_manager)
2260             IMFQualityManager_Shutdown(session->quality_manager);
2261         MFShutdownObject((IUnknown *)session->clock);
2262         IMFPresentationClock_Release(session->clock);
2263         session->clock = NULL;
2264         session_clear_presentation(session);
2265         session_clear_queued_topologies(session);
2266         session_submit_simple_command(session, SESSION_CMD_SHUTDOWN);
2267     }
2268     LeaveCriticalSection(&session->cs);
2269
2270     return hr;
2271 }
2272
2273 static HRESULT WINAPI mfsession_GetClock(IMFMediaSession *iface, IMFClock **clock)
2274 {
2275     struct media_session *session = impl_from_IMFMediaSession(iface);
2276     HRESULT hr;
2277
2278     TRACE("%p, %p.\n", iface, clock);
2279
2280     EnterCriticalSection(&session->cs);
2281     if (SUCCEEDED(hr = session_is_shut_down(session)))
2282     {
2283         *clock = (IMFClock *)session->clock;
2284         IMFClock_AddRef(*clock);
2285     }
2286     LeaveCriticalSection(&session->cs);
2287
2288     return hr;
2289 }
2290
2291 static HRESULT WINAPI mfsession_GetSessionCapabilities(IMFMediaSession *iface, DWORD *caps)
2292 {
2293     struct media_session *session = impl_from_IMFMediaSession(iface);
2294     HRESULT hr = S_OK;
2295
2296     TRACE("%p, %p.\n", iface, caps);
2297
2298     if (!caps)
2299         return E_POINTER;
2300
2301     EnterCriticalSection(&session->cs);
2302     if (SUCCEEDED(hr = session_is_shut_down(session)))
2303         *caps = session->caps;
2304     LeaveCriticalSection(&session->cs);
2305
2306     return hr;
2307 }
2308
2309 static HRESULT WINAPI mfsession_GetFullTopology(IMFMediaSession *iface, DWORD flags, TOPOID id, IMFTopology **topology)
2310 {
2311     struct media_session *session = impl_from_IMFMediaSession(iface);
2312     struct queued_topology *queued;
2313     TOPOID topo_id;
2314     HRESULT hr;
2315
2316     TRACE("%p, %#lx, %s, %p.\n", iface, flags, wine_dbgstr_longlong(id), topology);
2317
2318     *topology = NULL;
2319
2320     EnterCriticalSection(&session->cs);
2321
2322     if (SUCCEEDED(hr = session_is_shut_down(session)))
2323     {
2324         if (flags & MFSESSION_GETFULLTOPOLOGY_CURRENT)
2325         {
2326             if (session->presentation.topo_status != MF_TOPOSTATUS_INVALID)
2327                 *topology = session->presentation.current_topology;
2328             else
2329                 hr = MF_E_INVALIDREQUEST;
2330         }
2331         else
2332         {
2333             LIST_FOR_EACH_ENTRY(queued, &session->topologies, struct queued_topology, entry)
2334             {
2335                 if (SUCCEEDED(IMFTopology_GetTopologyID(queued->topology, &topo_id)) && topo_id == id)
2336                 {
2337                     *topology = queued->topology;
2338                     break;
2339                 }
2340             }
2341         }
2342
2343         if (*topology)
2344             IMFTopology_AddRef(*topology);
2345     }
2346
2347     LeaveCriticalSection(&session->cs);
2348
2349     return hr;
2350 }
2351
2352 static const IMFMediaSessionVtbl mfmediasessionvtbl =
2353 {
2354     mfsession_QueryInterface,
2355     mfsession_AddRef,
2356     mfsession_Release,
2357     mfsession_GetEvent,
2358     mfsession_BeginGetEvent,
2359     mfsession_EndGetEvent,
2360     mfsession_QueueEvent,
2361     mfsession_SetTopology,
2362     mfsession_ClearTopologies,
2363     mfsession_Start,
2364     mfsession_Pause,
2365     mfsession_Stop,
2366     mfsession_Close,
2367     mfsession_Shutdown,
2368     mfsession_GetClock,
2369     mfsession_GetSessionCapabilities,
2370     mfsession_GetFullTopology,
2371 };
2372
2373 static HRESULT WINAPI session_get_service_QueryInterface(IMFGetService *iface, REFIID riid, void **obj)
2374 {
2375     struct media_session *session = impl_from_IMFGetService(iface);
2376     return IMFMediaSession_QueryInterface(&session->IMFMediaSession_iface, riid, obj);
2377 }
2378
2379 static ULONG WINAPI session_get_service_AddRef(IMFGetService *iface)
2380 {
2381     struct media_session *session = impl_from_IMFGetService(iface);
2382     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
2383 }
2384
2385 static ULONG WINAPI session_get_service_Release(IMFGetService *iface)
2386 {
2387     struct media_session *session = impl_from_IMFGetService(iface);
2388     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
2389 }
2390
2391 typedef BOOL (*p_renderer_node_test_func)(IMFMediaSink *sink);
2392
2393 static BOOL session_video_renderer_test_func(IMFMediaSink *sink)
2394 {
2395     IUnknown *obj;
2396     HRESULT hr;
2397
2398     /* Use first sink to support IMFVideoRenderer. */
2399     hr = IMFMediaSink_QueryInterface(sink, &IID_IMFVideoRenderer, (void **)&obj);
2400     if (obj)
2401         IUnknown_Release(obj);
2402
2403     return hr == S_OK;
2404 }
2405
2406 static BOOL session_audio_renderer_test_func(IMFMediaSink *sink)
2407 {
2408     return mf_is_sar_sink(sink);
2409 }
2410
2411 static HRESULT session_get_renderer_node_service(struct media_session *session,
2412         p_renderer_node_test_func node_test_func, REFGUID service, REFIID riid, void **obj)
2413 {
2414     HRESULT hr = E_NOINTERFACE;
2415     IMFStreamSink *stream_sink;
2416     IMFTopologyNode *node;
2417     IMFCollection *nodes;
2418     IMFMediaSink *sink;
2419     unsigned int i = 0;
2420
2421     if (session->presentation.current_topology)
2422     {
2423         if (SUCCEEDED(IMFTopology_GetOutputNodeCollection(session->presentation.current_topology,
2424                 &nodes)))
2425         {
2426             while (IMFCollection_GetElement(nodes, i++, (IUnknown **)&node) == S_OK)
2427             {
2428                 if (SUCCEEDED(topology_node_get_object(node, &IID_IMFStreamSink, (void **)&stream_sink)))
2429                 {
2430                     if (SUCCEEDED(IMFStreamSink_GetMediaSink(stream_sink, &sink)))
2431                     {
2432                         if (node_test_func(sink))
2433                         {
2434                             if (FAILED(hr = MFGetService((IUnknown *)sink, service, riid, obj)))
2435                                 WARN("Failed to get service from renderer node, %#lx.\n", hr);
2436                         }
2437                         IMFMediaSink_Release(sink);
2438                     }
2439                     IMFStreamSink_Release(stream_sink);
2440                 }
2441
2442                 IMFTopologyNode_Release(node);
2443
2444                 if (*obj)
2445                     break;
2446             }
2447
2448             IMFCollection_Release(nodes);
2449         }
2450     }
2451
2452     return hr;
2453 }
2454
2455 static HRESULT session_get_audio_render_service(struct media_session *session, REFGUID service,
2456         REFIID riid, void **obj)
2457 {
2458     return session_get_renderer_node_service(session, session_audio_renderer_test_func,
2459             service, riid, obj);
2460 }
2461
2462 static HRESULT session_get_video_render_service(struct media_session *session, REFGUID service,
2463         REFIID riid, void **obj)
2464 {
2465     return session_get_renderer_node_service(session, session_video_renderer_test_func,
2466             service, riid, obj);
2467 }
2468
2469 static HRESULT WINAPI session_get_service_GetService(IMFGetService *iface, REFGUID service, REFIID riid, void **obj)
2470 {
2471     struct media_session *session = impl_from_IMFGetService(iface);
2472     HRESULT hr = S_OK;
2473
2474     TRACE("%p, %s, %s, %p.\n", iface, debugstr_guid(service), debugstr_guid(riid), obj);
2475
2476     *obj = NULL;
2477
2478     EnterCriticalSection(&session->cs);
2479     if (FAILED(hr = session_is_shut_down(session)))
2480     {
2481     }
2482     else if (IsEqualGUID(service, &MF_RATE_CONTROL_SERVICE))
2483     {
2484         if (IsEqualIID(riid, &IID_IMFRateSupport))
2485         {
2486             *obj = &session->IMFRateSupport_iface;
2487         }
2488         else if (IsEqualIID(riid, &IID_IMFRateControl))
2489         {
2490             *obj = &session->IMFRateControl_iface;
2491         }
2492         else
2493             hr = E_NOINTERFACE;
2494
2495         if (*obj)
2496             IUnknown_AddRef((IUnknown *)*obj);
2497     }
2498     else if (IsEqualGUID(service, &MF_LOCAL_MFT_REGISTRATION_SERVICE))
2499     {
2500         hr = IMFLocalMFTRegistration_QueryInterface(&local_mft_registration, riid, obj);
2501     }
2502     else if (IsEqualGUID(service, &MF_TOPONODE_ATTRIBUTE_EDITOR_SERVICE))
2503     {
2504         *obj = &session->IMFTopologyNodeAttributeEditor_iface;
2505         IUnknown_AddRef((IUnknown *)*obj);
2506     }
2507     else if (IsEqualGUID(service, &MR_VIDEO_RENDER_SERVICE))
2508     {
2509         hr = session_get_video_render_service(session, service, riid, obj);
2510     }
2511     else if (IsEqualGUID(service, &MR_POLICY_VOLUME_SERVICE) ||
2512             IsEqualGUID(service, &MR_STREAM_VOLUME_SERVICE))
2513     {
2514         hr = session_get_audio_render_service(session, service, riid, obj);
2515     }
2516     else
2517         FIXME("Unsupported service %s.\n", debugstr_guid(service));
2518
2519     LeaveCriticalSection(&session->cs);
2520
2521     return hr;
2522 }
2523
2524 static const IMFGetServiceVtbl session_get_service_vtbl =
2525 {
2526     session_get_service_QueryInterface,
2527     session_get_service_AddRef,
2528     session_get_service_Release,
2529     session_get_service_GetService,
2530 };
2531
2532 static HRESULT WINAPI session_commands_callback_QueryInterface(IMFAsyncCallback *iface, REFIID riid, void **obj)
2533 {
2534     if (IsEqualIID(riid, &IID_IMFAsyncCallback) ||
2535             IsEqualIID(riid, &IID_IUnknown))
2536     {
2537         *obj = iface;
2538         IMFAsyncCallback_AddRef(iface);
2539         return S_OK;
2540     }
2541
2542     WARN("Unsupported %s.\n", debugstr_guid(riid));
2543     *obj = NULL;
2544     return E_NOINTERFACE;
2545 }
2546
2547 static ULONG WINAPI session_commands_callback_AddRef(IMFAsyncCallback *iface)
2548 {
2549     struct media_session *session = impl_from_commands_callback_IMFAsyncCallback(iface);
2550     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
2551 }
2552
2553 static ULONG WINAPI session_commands_callback_Release(IMFAsyncCallback *iface)
2554 {
2555     struct media_session *session = impl_from_commands_callback_IMFAsyncCallback(iface);
2556     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
2557 }
2558
2559 static HRESULT WINAPI session_commands_callback_GetParameters(IMFAsyncCallback *iface, DWORD *flags, DWORD *queue)
2560 {
2561     return E_NOTIMPL;
2562 }
2563
2564 static void session_deliver_pending_samples(struct media_session *session, IMFTopologyNode *node);
2565
2566 static HRESULT WINAPI session_commands_callback_Invoke(IMFAsyncCallback *iface, IMFAsyncResult *result)
2567 {
2568     struct session_op *op = impl_op_from_IUnknown(IMFAsyncResult_GetStateNoAddRef(result));
2569     struct media_session *session = impl_from_commands_callback_IMFAsyncCallback(iface);
2570
2571     TRACE("session %p, op %p, command %u.\n", session, op, op->command);
2572
2573     EnterCriticalSection(&session->cs);
2574
2575     if (session->presentation.flags & SESSION_FLAG_PENDING_COMMAND)
2576     {
2577         WARN("session %p command is in progress, waiting for it to complete.\n", session);
2578         LeaveCriticalSection(&session->cs);
2579         return S_OK;
2580     }
2581
2582     list_remove(&op->entry);
2583     session->presentation.flags |= SESSION_FLAG_PENDING_COMMAND;
2584
2585     switch (op->command)
2586     {
2587         case SESSION_CMD_CLEAR_TOPOLOGIES:
2588             session_clear_topologies(session);
2589             break;
2590         case SESSION_CMD_SET_TOPOLOGY:
2591             session_set_topology(session, op->set_topology.flags, op->set_topology.topology);
2592             session_command_complete(session);
2593             break;
2594         case SESSION_CMD_START:
2595             session_start(session, &op->start.time_format, &op->start.start_position);
2596             break;
2597         case SESSION_CMD_PAUSE:
2598             session_pause(session);
2599             break;
2600         case SESSION_CMD_STOP:
2601             session_stop(session);
2602             break;
2603         case SESSION_CMD_CLOSE:
2604             session_close(session);
2605             break;
2606         case SESSION_CMD_SET_RATE:
2607             session_set_rate(session, op->set_rate.thin, op->set_rate.rate);
2608             break;
2609         case SESSION_CMD_SHUTDOWN:
2610             session_clear_command_list(session);
2611             session_command_complete(session);
2612             break;
2613         default:
2614             ;
2615     }
2616
2617     LeaveCriticalSection(&session->cs);
2618
2619     IUnknown_Release(&op->IUnknown_iface);
2620
2621     return S_OK;
2622 }
2623
2624 static const IMFAsyncCallbackVtbl session_commands_callback_vtbl =
2625 {
2626     session_commands_callback_QueryInterface,
2627     session_commands_callback_AddRef,
2628     session_commands_callback_Release,
2629     session_commands_callback_GetParameters,
2630     session_commands_callback_Invoke,
2631 };
2632
2633 static HRESULT WINAPI session_sa_ready_callback_QueryInterface(IMFAsyncCallback *iface, REFIID riid, void **obj)
2634 {
2635     if (IsEqualIID(riid, &IID_IMFAsyncCallback)
2636             || IsEqualIID(riid, &IID_IUnknown))
2637     {
2638         *obj = iface;
2639         IMFAsyncCallback_AddRef(iface);
2640         return S_OK;
2641     }
2642
2643     WARN("Unsupported %s.\n", debugstr_guid(riid));
2644     *obj = NULL;
2645     return E_NOINTERFACE;
2646 }
2647
2648 static ULONG WINAPI session_sa_ready_callback_AddRef(IMFAsyncCallback *iface)
2649 {
2650     struct media_session *session = impl_from_sa_ready_callback_IMFAsyncCallback(iface);
2651     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
2652 }
2653
2654 static ULONG WINAPI session_sa_ready_callback_Release(IMFAsyncCallback *iface)
2655 {
2656     struct media_session *session = impl_from_sa_ready_callback_IMFAsyncCallback(iface);
2657     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
2658 }
2659
2660 static HRESULT WINAPI session_sa_ready_callback_GetParameters(IMFAsyncCallback *iface, DWORD *flags, DWORD *queue)
2661 {
2662     return E_NOTIMPL;
2663 }
2664
2665 static HRESULT WINAPI session_sa_ready_callback_Invoke(IMFAsyncCallback *iface, IMFAsyncResult *result)
2666 {
2667     IMFVideoSampleAllocatorNotify *notify = (IMFVideoSampleAllocatorNotify *)IMFAsyncResult_GetStateNoAddRef(result);
2668     struct topo_node *topo_node = impl_node_from_IMFVideoSampleAllocatorNotify(notify);
2669     struct media_session *session = impl_from_sa_ready_callback_IMFAsyncCallback(iface);
2670     IMFTopologyNode *upstream_node;
2671     DWORD upstream_output;
2672
2673     EnterCriticalSection(&session->cs);
2674
2675     if (topo_node->u.sink.requests)
2676     {
2677         if (SUCCEEDED(IMFTopologyNode_GetInput(topo_node->node, 0, &upstream_node, &upstream_output)))
2678         {
2679             session_deliver_pending_samples(session, upstream_node);
2680             IMFTopologyNode_Release(upstream_node);
2681         }
2682     }
2683
2684     LeaveCriticalSection(&session->cs);
2685
2686     return S_OK;
2687 }
2688
2689 static const IMFAsyncCallbackVtbl session_sa_ready_callback_vtbl =
2690 {
2691     session_sa_ready_callback_QueryInterface,
2692     session_sa_ready_callback_AddRef,
2693     session_sa_ready_callback_Release,
2694     session_sa_ready_callback_GetParameters,
2695     session_sa_ready_callback_Invoke,
2696 };
2697
2698 static HRESULT WINAPI session_events_callback_QueryInterface(IMFAsyncCallback *iface, REFIID riid, void **obj)
2699 {
2700     if (IsEqualIID(riid, &IID_IMFAsyncCallback) ||
2701             IsEqualIID(riid, &IID_IUnknown))
2702     {
2703         *obj = iface;
2704         IMFAsyncCallback_AddRef(iface);
2705         return S_OK;
2706     }
2707
2708     WARN("Unsupported %s.\n", debugstr_guid(riid));
2709     *obj = NULL;
2710     return E_NOINTERFACE;
2711 }
2712
2713 static ULONG WINAPI session_events_callback_AddRef(IMFAsyncCallback *iface)
2714 {
2715     struct media_session *session = impl_from_events_callback_IMFAsyncCallback(iface);
2716     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
2717 }
2718
2719 static ULONG WINAPI session_events_callback_Release(IMFAsyncCallback *iface)
2720 {
2721     struct media_session *session = impl_from_events_callback_IMFAsyncCallback(iface);
2722     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
2723 }
2724
2725 static HRESULT WINAPI session_events_callback_GetParameters(IMFAsyncCallback *iface, DWORD *flags, DWORD *queue)
2726 {
2727     return E_NOTIMPL;
2728 }
2729
2730 static HRESULT session_add_media_stream(struct media_session *session, IMFMediaSource *source, IMFMediaStream *stream)
2731 {
2732     struct topo_node *node;
2733     IMFStreamDescriptor *sd;
2734     DWORD stream_id = 0;
2735     HRESULT hr;
2736
2737     if (FAILED(hr = IMFMediaStream_GetStreamDescriptor(stream, &sd)))
2738         return hr;
2739
2740     hr = IMFStreamDescriptor_GetStreamIdentifier(sd, &stream_id);
2741     IMFStreamDescriptor_Release(sd);
2742     if (FAILED(hr))
2743         return hr;
2744
2745     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
2746     {
2747         if (node->type == MF_TOPOLOGY_SOURCESTREAM_NODE && node->u.source.source == source
2748                 && node->u.source.stream_id == stream_id)
2749         {
2750             if (node->object.source_stream)
2751             {
2752                 WARN("Node already has stream set.\n");
2753                 return S_FALSE;
2754             }
2755
2756             node->object.source_stream = stream;
2757             IMFMediaStream_AddRef(node->object.source_stream);
2758             break;
2759         }
2760     }
2761
2762     return S_OK;
2763 }
2764
2765 static BOOL session_is_source_nodes_state(struct media_session *session, enum object_state state)
2766 {
2767     struct media_source *source;
2768     struct topo_node *node;
2769
2770     LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
2771     {
2772         if (source->state != state)
2773             return FALSE;
2774     }
2775
2776     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
2777     {
2778         if (node->type == MF_TOPOLOGY_SOURCESTREAM_NODE && node->state != state)
2779             return FALSE;
2780     }
2781
2782     return TRUE;
2783 }
2784
2785 static BOOL session_is_output_nodes_state(struct media_session *session, enum object_state state)
2786 {
2787     struct topo_node *node;
2788
2789     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
2790     {
2791         if (node->type == MF_TOPOLOGY_OUTPUT_NODE && node->state != state)
2792             return FALSE;
2793     }
2794
2795     return TRUE;
2796 }
2797
2798 static enum object_state session_get_object_state_for_event(MediaEventType event)
2799 {
2800     switch (event)
2801     {
2802         case MESourceSeeked:
2803         case MEStreamSeeked:
2804         case MESourceStarted:
2805         case MEStreamStarted:
2806         case MEStreamSinkStarted:
2807             return OBJ_STATE_STARTED;
2808         case MESourcePaused:
2809         case MEStreamPaused:
2810         case MEStreamSinkPaused:
2811             return OBJ_STATE_PAUSED;
2812         case MESourceStopped:
2813         case MEStreamStopped:
2814         case MEStreamSinkStopped:
2815             return OBJ_STATE_STOPPED;
2816         case MEStreamSinkPrerolled:
2817             return OBJ_STATE_PREROLLED;
2818         default:
2819             return OBJ_STATE_INVALID;
2820     }
2821 }
2822
2823 static HRESULT session_start_clock(struct media_session *session)
2824 {
2825     LONGLONG start_offset = 0;
2826     HRESULT hr;
2827
2828     if (IsEqualGUID(&session->presentation.time_format, &GUID_NULL))
2829     {
2830         if (session->presentation.start_position.vt == VT_EMPTY)
2831             start_offset = PRESENTATION_CURRENT_POSITION;
2832         else if (session->presentation.start_position.vt == VT_I8)
2833             start_offset = session->presentation.start_position.hVal.QuadPart;
2834         else
2835             FIXME("Unhandled position type %d.\n", session->presentation.start_position.vt);
2836     }
2837     else
2838         FIXME("Unhandled time format %s.\n", debugstr_guid(&session->presentation.time_format));
2839
2840     if (FAILED(hr = IMFPresentationClock_Start(session->clock, start_offset)))
2841         WARN("Failed to start session clock, hr %#lx.\n", hr);
2842
2843     return hr;
2844 }
2845
2846 static struct topo_node *session_get_node_object(struct media_session *session, IUnknown *object,
2847         MF_TOPOLOGY_TYPE node_type)
2848 {
2849     struct topo_node *node = NULL;
2850
2851     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
2852     {
2853         if (node->type == node_type && object == node->object.object)
2854             break;
2855     }
2856
2857     return node;
2858 }
2859
2860 static BOOL session_set_node_object_state(struct media_session *session, IUnknown *object,
2861         MF_TOPOLOGY_TYPE node_type, enum object_state state)
2862 {
2863     struct topo_node *node;
2864     BOOL changed = FALSE;
2865
2866     if ((node = session_get_node_object(session, object, node_type)))
2867     {
2868         changed = node->state != state;
2869         node->state = state;
2870     }
2871
2872     return changed;
2873 }
2874
2875 static void session_set_source_object_state(struct media_session *session, IUnknown *object,
2876         MediaEventType event_type)
2877 {
2878     IMFStreamSink *stream_sink;
2879     struct media_source *src;
2880     struct media_sink *sink;
2881     enum object_state state;
2882     struct topo_node *node;
2883     BOOL changed = FALSE;
2884     DWORD i, count;
2885     HRESULT hr;
2886
2887     if ((state = session_get_object_state_for_event(event_type)) == OBJ_STATE_INVALID)
2888         return;
2889
2890     switch (event_type)
2891     {
2892         case MESourceSeeked:
2893         case MESourceStarted:
2894         case MESourcePaused:
2895         case MESourceStopped:
2896
2897             LIST_FOR_EACH_ENTRY(src, &session->presentation.sources, struct media_source, entry)
2898             {
2899                 if (object == src->object)
2900                 {
2901                     changed = src->state != state;
2902                     src->state = state;
2903                     break;
2904                 }
2905             }
2906             break;
2907         case MEStreamSeeked:
2908         case MEStreamStarted:
2909         case MEStreamPaused:
2910         case MEStreamStopped:
2911
2912             changed = session_set_node_object_state(session, object, MF_TOPOLOGY_SOURCESTREAM_NODE, state);
2913         default:
2914             ;
2915     }
2916
2917     if (!changed)
2918         return;
2919
2920     switch (session->state)
2921     {
2922         case SESSION_STATE_STARTING_SOURCES:
2923             if (!session_is_source_nodes_state(session, OBJ_STATE_STARTED))
2924                 break;
2925
2926             session_set_topo_status(session, S_OK, MF_TOPOSTATUS_STARTED_SOURCE);
2927
2928             session_set_presentation_clock(session);
2929
2930             if (session->presentation.flags & SESSION_FLAG_NEEDS_PREROLL)
2931             {
2932                 MFTIME preroll_time = 0;
2933
2934                 if (session->presentation.start_position.vt == VT_I8)
2935                     preroll_time = session->presentation.start_position.hVal.QuadPart;
2936
2937                 /* Mark stream sinks without prerolling support as PREROLLED to keep state test logic generic. */
2938                 LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
2939                 {
2940                     if (sink->preroll)
2941                     {
2942                         /* FIXME: abort and enter error state on failure. */
2943                         if (FAILED(hr = IMFMediaSinkPreroll_NotifyPreroll(sink->preroll, preroll_time)))
2944                             WARN("Preroll notification failed, hr %#lx.\n", hr);
2945                     }
2946                     else
2947                     {
2948                         if (SUCCEEDED(IMFMediaSink_GetStreamSinkCount(sink->sink, &count)))
2949                         {
2950                             for (i = 0; i < count; ++i)
2951                             {
2952                                 if (SUCCEEDED(IMFMediaSink_GetStreamSinkByIndex(sink->sink, i, &stream_sink)))
2953                                 {
2954                                     session_set_node_object_state(session, (IUnknown *)stream_sink, MF_TOPOLOGY_OUTPUT_NODE,
2955                                             OBJ_STATE_PREROLLED);
2956                                     IMFStreamSink_Release(stream_sink);
2957                                 }
2958                             }
2959                         }
2960                     }
2961                 }
2962                 session->state = SESSION_STATE_PREROLLING_SINKS;
2963             }
2964             else if (SUCCEEDED(session_start_clock(session)))
2965                 session->state = SESSION_STATE_STARTING_SINKS;
2966
2967             break;
2968         case SESSION_STATE_PAUSING_SOURCES:
2969             if (!session_is_source_nodes_state(session, OBJ_STATE_PAUSED))
2970                 break;
2971
2972             session_set_paused(session, SESSION_STATE_PAUSED, S_OK);
2973             break;
2974         case SESSION_STATE_STOPPING_SOURCES:
2975             if (!session_is_source_nodes_state(session, OBJ_STATE_STOPPED))
2976                 break;
2977
2978             LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
2979             {
2980                 switch (node->type)
2981                 {
2982                     case MF_TOPOLOGY_OUTPUT_NODE:
2983                         IMFStreamSink_Flush(node->object.sink_stream);
2984                         break;
2985                     case MF_TOPOLOGY_TRANSFORM_NODE:
2986                         IMFTransform_ProcessMessage(node->object.transform, MFT_MESSAGE_COMMAND_FLUSH, 0);
2987                         break;
2988                     default:
2989                         ;
2990                 }
2991             }
2992
2993             session_set_caps(session, session->caps & ~MFSESSIONCAP_PAUSE);
2994
2995             if (session->presentation.flags & SESSION_FLAG_FINALIZE_SINKS)
2996                 session_finalize_sinks(session);
2997             else
2998                 session_set_stopped(session, S_OK);
2999
3000             break;
3001         default:
3002             ;
3003     }
3004 }
3005
3006 static void session_set_sink_stream_state(struct media_session *session, IMFStreamSink *stream,
3007         MediaEventType event_type)
3008 {
3009     struct media_source *source;
3010     enum object_state state;
3011     HRESULT hr = S_OK;
3012     BOOL changed;
3013
3014     if ((state = session_get_object_state_for_event(event_type)) == OBJ_STATE_INVALID)
3015         return;
3016
3017     if (!(changed = session_set_node_object_state(session, (IUnknown *)stream, MF_TOPOLOGY_OUTPUT_NODE, state)))
3018         return;
3019
3020     switch (session->state)
3021     {
3022         case SESSION_STATE_PREROLLING_SINKS:
3023             if (!session_is_output_nodes_state(session, OBJ_STATE_PREROLLED))
3024                 break;
3025
3026             if (SUCCEEDED(session_start_clock(session)))
3027                 session->state = SESSION_STATE_STARTING_SINKS;
3028             break;
3029         case SESSION_STATE_STARTING_SINKS:
3030             if (!session_is_output_nodes_state(session, OBJ_STATE_STARTED))
3031                 break;
3032
3033             session_set_started(session);
3034             break;
3035         case SESSION_STATE_PAUSING_SINKS:
3036             if (!session_is_output_nodes_state(session, OBJ_STATE_PAUSED))
3037                 break;
3038
3039             session->state = SESSION_STATE_PAUSING_SOURCES;
3040
3041             LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
3042             {
3043                 if (FAILED(hr = IMFMediaSource_Pause(source->source)))
3044                     break;
3045             }
3046
3047             if (FAILED(hr))
3048                 session_set_paused(session, SESSION_STATE_PAUSED, hr);
3049
3050             break;
3051         case SESSION_STATE_STOPPING_SINKS:
3052             if (!session_is_output_nodes_state(session, OBJ_STATE_STOPPED))
3053                 break;
3054
3055             session->state = SESSION_STATE_STOPPING_SOURCES;
3056
3057             LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
3058             {
3059                 if (session->presentation.flags & SESSION_FLAG_END_OF_PRESENTATION)
3060                     IMFMediaSource_Stop(source->source);
3061                 else if (FAILED(hr = IMFMediaSource_Stop(source->source)))
3062                     break;
3063             }
3064
3065             if (session->presentation.flags & SESSION_FLAG_END_OF_PRESENTATION || FAILED(hr))
3066                 session_set_stopped(session, hr);
3067
3068             break;
3069         default:
3070             ;
3071     }
3072 }
3073
3074 static HRESULT transform_get_external_output_sample(const struct media_session *session, struct topo_node *transform,
3075         unsigned int output_index, const MFT_OUTPUT_STREAM_INFO *stream_info, IMFSample **sample)
3076 {
3077     IMFTopologyNode *downstream_node;
3078     IMFMediaBuffer *buffer = NULL;
3079     struct topo_node *topo_node;
3080     unsigned int buffer_size;
3081     DWORD downstream_input;
3082     TOPOID node_id;
3083     HRESULT hr;
3084
3085     if (FAILED(IMFTopologyNode_GetOutput(transform->node, output_index, &downstream_node, &downstream_input)))
3086     {
3087         WARN("Failed to get connected node for output %u.\n", output_index);
3088         return MF_E_UNEXPECTED;
3089     }
3090
3091     IMFTopologyNode_GetTopoNodeID(downstream_node, &node_id);
3092     IMFTopologyNode_Release(downstream_node);
3093
3094     topo_node = session_get_node_by_id(session, node_id);
3095
3096     if (topo_node->type == MF_TOPOLOGY_OUTPUT_NODE && topo_node->u.sink.allocator)
3097     {
3098         hr = IMFVideoSampleAllocator_AllocateSample(topo_node->u.sink.allocator, sample);
3099     }
3100     else
3101     {
3102         buffer_size = max(stream_info->cbSize, transform->u.transform.outputs[output_index].min_buffer_size);
3103
3104         hr = MFCreateAlignedMemoryBuffer(buffer_size, stream_info->cbAlignment, &buffer);
3105         if (SUCCEEDED(hr))
3106             hr = MFCreateSample(sample);
3107
3108         if (SUCCEEDED(hr))
3109             hr = IMFSample_AddBuffer(*sample, buffer);
3110
3111         if (buffer)
3112             IMFMediaBuffer_Release(buffer);
3113     }
3114
3115     return hr;
3116 }
3117
3118 static HRESULT transform_node_pull_samples(const struct media_session *session, struct topo_node *node)
3119 {
3120     MFT_OUTPUT_STREAM_INFO stream_info;
3121     MFT_OUTPUT_DATA_BUFFER *buffers;
3122     HRESULT hr = E_UNEXPECTED;
3123     DWORD status = 0;
3124     unsigned int i;
3125
3126     if (!(buffers = calloc(node->u.transform.output_count, sizeof(*buffers))))
3127         return E_OUTOFMEMORY;
3128
3129     for (i = 0; i < node->u.transform.output_count; ++i)
3130     {
3131         buffers[i].dwStreamID = transform_node_get_stream_id(node, TRUE, i);
3132         buffers[i].pSample = NULL;
3133         buffers[i].dwStatus = 0;
3134         buffers[i].pEvents = NULL;
3135
3136         memset(&stream_info, 0, sizeof(stream_info));
3137         if (FAILED(hr = IMFTransform_GetOutputStreamInfo(node->object.transform, buffers[i].dwStreamID, &stream_info)))
3138             break;
3139
3140         if (!(stream_info.dwFlags & (MFT_OUTPUT_STREAM_PROVIDES_SAMPLES | MFT_OUTPUT_STREAM_CAN_PROVIDE_SAMPLES)))
3141         {
3142             if (FAILED(hr = transform_get_external_output_sample(session, node, i, &stream_info, &buffers[i].pSample)))
3143                 break;
3144         }
3145     }
3146
3147     if (SUCCEEDED(hr))
3148         hr = IMFTransform_ProcessOutput(node->object.transform, 0, node->u.transform.output_count, buffers, &status);
3149
3150     /* Collect returned samples for all streams. */
3151     for (i = 0; i < node->u.transform.output_count; ++i)
3152     {
3153         struct transform_stream *stream = &node->u.transform.outputs[i];
3154
3155         if (buffers[i].pEvents)
3156             IMFCollection_Release(buffers[i].pEvents);
3157
3158         if (SUCCEEDED(hr) && !(buffers[i].dwStatus & MFT_OUTPUT_DATA_BUFFER_NO_SAMPLE))
3159         {
3160             if (session->quality_manager)
3161                 IMFQualityManager_NotifyProcessOutput(session->quality_manager, node->node, i, buffers[i].pSample);
3162             if (FAILED(hr = transform_stream_push_sample(stream, buffers[i].pSample)))
3163                 WARN("Failed to queue output sample, hr %#lx\n", hr);
3164         }
3165
3166         if (buffers[i].pSample)
3167             IMFSample_Release(buffers[i].pSample);
3168     }
3169
3170     free(buffers);
3171
3172     return hr;
3173 }
3174
3175 static BOOL transform_node_is_drained(struct topo_node *topo_node)
3176 {
3177     UINT i;
3178
3179     for (i = 0; i < topo_node->u.transform.input_count; i++)
3180     {
3181         struct transform_stream *stream = &topo_node->u.transform.inputs[i];
3182         if (!stream->draining)
3183             return FALSE;
3184     }
3185
3186     return TRUE;
3187 }
3188
3189 static BOOL transform_node_has_requests(struct topo_node *topo_node)
3190 {
3191     UINT i;
3192
3193     for (i = 0; i < topo_node->u.transform.output_count; i++)
3194         if (topo_node->u.transform.outputs[i].requests)
3195             return TRUE;
3196
3197     return FALSE;
3198 }
3199
3200 static HRESULT transform_node_push_sample(const struct media_session *session, struct topo_node *topo_node,
3201         UINT input, IMFSample *sample)
3202 {
3203     struct transform_stream *stream = &topo_node->u.transform.inputs[input];
3204     UINT id = transform_node_get_stream_id(topo_node, FALSE, input);
3205     IMFTransform *transform = topo_node->object.transform;
3206     HRESULT hr;
3207
3208     if (sample)
3209     {
3210         hr = IMFTransform_ProcessInput(transform, id, sample, 0);
3211         if (hr == MF_E_NOTACCEPTING)
3212             hr = transform_stream_push_sample(stream, sample);
3213     }
3214     else
3215     {
3216         if (FAILED(hr = IMFTransform_ProcessMessage(transform, MFT_MESSAGE_COMMAND_DRAIN, id)))
3217             WARN("Drain command failed for transform, hr %#lx.\n", hr);
3218         else
3219             stream->draining = TRUE;
3220     }
3221
3222     return hr;
3223 }
3224
3225 static void session_deliver_sample_to_node(struct media_session *session, IMFTopologyNode *node, unsigned int input,
3226         IMFSample *sample);
3227
3228 static void transform_node_deliver_samples(struct media_session *session, struct topo_node *topo_node)
3229 {
3230     IMFTopologyNode *up_node = topo_node->node, *down_node;
3231     BOOL drained = transform_node_is_drained(topo_node);
3232     DWORD output, input;
3233     IMFSample *sample;
3234     HRESULT hr = S_OK;
3235
3236     /* Push down all available output. */
3237     for (output = 0; SUCCEEDED(hr) && output < topo_node->u.transform.output_count; ++output)
3238     {
3239         struct transform_stream *stream = &topo_node->u.transform.outputs[output];
3240
3241         if (FAILED(hr = IMFTopologyNode_GetOutput(up_node, output, &down_node, &input)))
3242         {
3243             WARN("Failed to node %p/%lu output, hr %#lx.\n", up_node, output, hr);
3244             continue;
3245         }
3246
3247         while (stream->requests)
3248         {
3249             if (FAILED(hr = transform_stream_pop_sample(stream, &sample)))
3250             {
3251                 /* try getting more samples by calling IMFTransform_ProcessOutput */
3252                 if (FAILED(hr = transform_node_pull_samples(session, topo_node)))
3253                     break;
3254                 if (FAILED(hr = transform_stream_pop_sample(stream, &sample)))
3255                     break;
3256             }
3257
3258             session_deliver_sample_to_node(session, down_node, input, sample);
3259             stream->requests--;
3260             IMFSample_Release(sample);
3261         }
3262
3263         while (stream->requests && drained)
3264         {
3265             session_deliver_sample_to_node(session, down_node, input, NULL);
3266             stream->requests--;
3267         }
3268
3269         IMFTopologyNode_Release(down_node);
3270     }
3271
3272     if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT && transform_node_has_requests(topo_node))
3273     {
3274         struct transform_stream *stream;
3275
3276         input = topo_node->u.transform.next_input++ % topo_node->u.transform.input_count;
3277         stream = &topo_node->u.transform.inputs[input];
3278
3279         if (SUCCEEDED(transform_stream_pop_sample(stream, &sample)))
3280             session_deliver_sample_to_node(session, topo_node->node, input, sample);
3281         else if (FAILED(hr = IMFTopologyNode_GetInput(topo_node->node, input, &up_node, &output)))
3282             WARN("Failed to get node %p/%lu input, hr %#lx\n", topo_node->node, input, hr);
3283         else
3284         {
3285             if (FAILED(hr = session_request_sample_from_node(session, up_node, output)))
3286                 WARN("Failed to request sample from upstream node %p/%lu, hr %#lx\n", up_node, output, hr);
3287             IMFTopologyNode_Release(up_node);
3288         }
3289     }
3290 }
3291
3292 static void session_deliver_sample_to_node(struct media_session *session, IMFTopologyNode *node, unsigned int input,
3293         IMFSample *sample)
3294 {
3295     struct topo_node *topo_node;
3296     MF_TOPOLOGY_TYPE node_type;
3297     TOPOID node_id;
3298     HRESULT hr;
3299
3300     if (session->quality_manager)
3301         IMFQualityManager_NotifyProcessInput(session->quality_manager, node, input, sample);
3302
3303     IMFTopologyNode_GetNodeType(node, &node_type);
3304     IMFTopologyNode_GetTopoNodeID(node, &node_id);
3305
3306     topo_node = session_get_node_by_id(session, node_id);
3307
3308     switch (node_type)
3309     {
3310         case MF_TOPOLOGY_OUTPUT_NODE:
3311             if (topo_node->u.sink.requests)
3312             {
3313                 if (sample)
3314                 {
3315                     if (FAILED(hr = IMFStreamSink_ProcessSample(topo_node->object.sink_stream, sample)))
3316                         WARN("Stream sink failed to process sample, hr %#lx.\n", hr);
3317                 }
3318                 else if (FAILED(hr = IMFStreamSink_PlaceMarker(topo_node->object.sink_stream, MFSTREAMSINK_MARKER_ENDOFSEGMENT,
3319                         NULL, NULL)))
3320                 {
3321                     WARN("Failed to place sink marker, hr %#lx.\n", hr);
3322                 }
3323                 topo_node->u.sink.requests--;
3324             }
3325             break;
3326         case MF_TOPOLOGY_TRANSFORM_NODE:
3327             if (FAILED(hr = transform_node_push_sample(session, topo_node, input, sample)))
3328                 WARN("Failed to push or queue sample to transform, hr %#lx\n", hr);
3329             transform_node_pull_samples(session, topo_node);
3330             transform_node_deliver_samples(session, topo_node);
3331             break;
3332         case MF_TOPOLOGY_TEE_NODE:
3333             FIXME("Unhandled downstream node type %d.\n", node_type);
3334             break;
3335         default:
3336             ;
3337     }
3338 }
3339
3340 static void session_deliver_pending_samples(struct media_session *session, IMFTopologyNode *node)
3341 {
3342     struct topo_node *topo_node;
3343     MF_TOPOLOGY_TYPE node_type;
3344     TOPOID node_id;
3345
3346     IMFTopologyNode_GetNodeType(node, &node_type);
3347     IMFTopologyNode_GetTopoNodeID(node, &node_id);
3348
3349     topo_node = session_get_node_by_id(session, node_id);
3350
3351     switch (node_type)
3352     {
3353         case MF_TOPOLOGY_TRANSFORM_NODE:
3354             transform_node_pull_samples(session, topo_node);
3355             transform_node_deliver_samples(session, topo_node);
3356             break;
3357         default:
3358             FIXME("Unexpected node type %u.\n", node_type);
3359     }
3360 }
3361
3362
3363 static HRESULT session_request_sample_from_node(struct media_session *session, IMFTopologyNode *node, DWORD output)
3364 {
3365     IMFTopologyNode *down_node;
3366     struct topo_node *topo_node;
3367     MF_TOPOLOGY_TYPE node_type;
3368     HRESULT hr = S_OK;
3369     IMFSample *sample;
3370     TOPOID node_id;
3371     DWORD input;
3372
3373     IMFTopologyNode_GetNodeType(node, &node_type);
3374     IMFTopologyNode_GetTopoNodeID(node, &node_id);
3375
3376     topo_node = session_get_node_by_id(session, node_id);
3377
3378     switch (node_type)
3379     {
3380         case MF_TOPOLOGY_SOURCESTREAM_NODE:
3381             if (FAILED(hr = IMFMediaStream_RequestSample(topo_node->object.source_stream, NULL)))
3382                 WARN("Sample request failed, hr %#lx.\n", hr);
3383             break;
3384         case MF_TOPOLOGY_TRANSFORM_NODE:
3385         {
3386             struct transform_stream *stream = &topo_node->u.transform.outputs[output];
3387
3388             if (FAILED(hr = IMFTopologyNode_GetOutput(node, output, &down_node, &input)))
3389             {
3390                 WARN("Failed to node %p/%lu output, hr %#lx.\n", node, output, hr);
3391                 break;
3392             }
3393
3394             if (SUCCEEDED(transform_stream_pop_sample(stream, &sample)))
3395             {
3396                 session_deliver_sample_to_node(session, down_node, input, sample);
3397                 IMFSample_Release(sample);
3398             }
3399             else if (transform_node_has_requests(topo_node))
3400             {
3401                 /* there's already requests pending, just increase the counter */
3402                 stream->requests++;
3403             }
3404             else
3405             {
3406                 stream->requests++;
3407                 transform_node_deliver_samples(session, topo_node);
3408             }
3409
3410             IMFTopologyNode_Release(down_node);
3411             break;
3412         }
3413         case MF_TOPOLOGY_TEE_NODE:
3414             FIXME("Unhandled upstream node type %d.\n", node_type);
3415         default:
3416             hr = E_UNEXPECTED;
3417     }
3418
3419     return hr;
3420 }
3421
3422 static void session_request_sample(struct media_session *session, IMFStreamSink *sink_stream)
3423 {
3424     struct topo_node *sink_node = NULL, *node;
3425     IMFTopologyNode *upstream_node;
3426     DWORD upstream_output;
3427     HRESULT hr;
3428
3429     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
3430     {
3431         if (node->type == MF_TOPOLOGY_OUTPUT_NODE && node->object.sink_stream == sink_stream)
3432         {
3433             sink_node = node;
3434             break;
3435         }
3436     }
3437
3438     if (!sink_node)
3439         return;
3440
3441     if (FAILED(hr = IMFTopologyNode_GetInput(sink_node->node, 0, &upstream_node, &upstream_output)))
3442     {
3443         WARN("Failed to get upstream node connection, hr %#lx.\n", hr);
3444         return;
3445     }
3446
3447     sink_node->u.sink.requests++;
3448     if (FAILED(session_request_sample_from_node(session, upstream_node, upstream_output)))
3449         sink_node->u.sink.requests--;
3450     IMFTopologyNode_Release(upstream_node);
3451 }
3452
3453 static void session_deliver_sample(struct media_session *session, IMFMediaStream *stream, const PROPVARIANT *value)
3454 {
3455     struct topo_node *source_node = NULL, *node;
3456     IMFTopologyNode *downstream_node;
3457     DWORD downstream_input;
3458     HRESULT hr;
3459
3460     if (value && (value->vt != VT_UNKNOWN || !value->punkVal))
3461     {
3462         WARN("Unexpected value type %d.\n", value->vt);
3463         return;
3464     }
3465
3466     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
3467     {
3468         if (node->type == MF_TOPOLOGY_SOURCESTREAM_NODE && node->object.source_stream == stream)
3469         {
3470             source_node = node;
3471             break;
3472         }
3473     }
3474
3475     if (!source_node)
3476         return;
3477
3478     if (!value)
3479         source_node->flags |= TOPO_NODE_END_OF_STREAM;
3480
3481     if (FAILED(hr = IMFTopologyNode_GetOutput(source_node->node, 0, &downstream_node, &downstream_input)))
3482     {
3483         WARN("Failed to get downstream node connection, hr %#lx.\n", hr);
3484         return;
3485     }
3486
3487     session_deliver_sample_to_node(session, downstream_node, downstream_input, value ? (IMFSample *)value->punkVal : NULL);
3488     IMFTopologyNode_Release(downstream_node);
3489 }
3490
3491 static void session_sink_invalidated(struct media_session *session, IMFMediaEvent *event, IMFStreamSink *sink)
3492 {
3493     struct topo_node *node, *sink_node = NULL;
3494     HRESULT hr;
3495
3496     LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
3497     {
3498         if (node->type == MF_TOPOLOGY_OUTPUT_NODE && node->object.sink_stream == sink)
3499         {
3500             sink_node = node;
3501             break;
3502         }
3503     }
3504
3505     if (!sink_node)
3506         return;
3507
3508     if (!event)
3509     {
3510         if (FAILED(hr = MFCreateMediaEvent(MESinkInvalidated, &GUID_NULL, S_OK, NULL, &event)))
3511             WARN("Failed to create event, hr %#lx.\n", hr);
3512     }
3513
3514     if (!event)
3515         return;
3516
3517     IMFMediaEvent_SetUINT64(event, &MF_EVENT_OUTPUT_NODE, sink_node->node_id);
3518     IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3519
3520     session_set_topo_status(session, S_OK, MF_TOPOSTATUS_ENDED);
3521 }
3522
3523 static BOOL session_nodes_is_mask_set(struct media_session *session, MF_TOPOLOGY_TYPE node_type, unsigned int flags)
3524 {
3525     struct media_source *source;
3526     struct topo_node *node;
3527
3528     if (node_type == MF_TOPOLOGY_MAX)
3529     {
3530         LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
3531         {
3532             if ((source->flags & flags) != flags)
3533                 return FALSE;
3534         }
3535     }
3536     else
3537     {
3538         LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
3539         {
3540             if (node->type == node_type && (node->flags & flags) != flags)
3541                 return FALSE;
3542         }
3543     }
3544
3545     return TRUE;
3546 }
3547
3548 static void session_nodes_unset_mask(struct media_session *session, MF_TOPOLOGY_TYPE node_type, unsigned int flags)
3549 {
3550     struct media_source *source;
3551     struct topo_node *node;
3552
3553     if (node_type == MF_TOPOLOGY_MAX)
3554     {
3555         LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
3556         {
3557             source->flags &= ~flags;
3558         }
3559     }
3560     else
3561     {
3562         LIST_FOR_EACH_ENTRY(node, &session->presentation.nodes, struct topo_node, entry)
3563         {
3564             if (node->type == node_type)
3565             {
3566                 node->flags &= ~flags;
3567             }
3568         }
3569     }
3570 }
3571
3572 static void session_raise_end_of_presentation(struct media_session *session)
3573 {
3574     if (!(session_nodes_is_mask_set(session, MF_TOPOLOGY_SOURCESTREAM_NODE, TOPO_NODE_END_OF_STREAM)))
3575         return;
3576
3577     if (!(session->presentation.flags & SESSION_FLAG_END_OF_PRESENTATION))
3578     {
3579         if (session_nodes_is_mask_set(session, MF_TOPOLOGY_MAX, SOURCE_FLAG_END_OF_PRESENTATION))
3580         {
3581             session->presentation.flags |= SESSION_FLAG_END_OF_PRESENTATION | SESSION_FLAG_PENDING_COMMAND;
3582             IMFMediaEventQueue_QueueEventParamVar(session->event_queue, MEEndOfPresentation, &GUID_NULL, S_OK, NULL);
3583         }
3584     }
3585 }
3586
3587 static void session_handle_end_of_stream(struct media_session *session, IMFMediaStream *stream)
3588 {
3589     struct topo_node *node;
3590
3591     if (!(node = session_get_node_object(session, (IUnknown *)stream, MF_TOPOLOGY_SOURCESTREAM_NODE))
3592             || node->flags & TOPO_NODE_END_OF_STREAM)
3593     {
3594         return;
3595     }
3596
3597     session_deliver_sample(session, stream, NULL);
3598
3599     session_raise_end_of_presentation(session);
3600 }
3601
3602 static void session_handle_end_of_presentation(struct media_session *session, IMFMediaSource *object)
3603 {
3604     struct media_source *source;
3605
3606     LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
3607     {
3608         if (source->source == object)
3609         {
3610             if (!(source->flags & SOURCE_FLAG_END_OF_PRESENTATION))
3611             {
3612                 source->flags |= SOURCE_FLAG_END_OF_PRESENTATION;
3613                 session_raise_end_of_presentation(session);
3614             }
3615
3616             break;
3617         }
3618     }
3619 }
3620
3621 static void session_sink_stream_marker(struct media_session *session, IMFStreamSink *stream_sink)
3622 {
3623     struct topo_node *node;
3624
3625     if (!(node = session_get_node_object(session, (IUnknown *)stream_sink, MF_TOPOLOGY_OUTPUT_NODE))
3626             || node->flags & TOPO_NODE_END_OF_STREAM)
3627     {
3628         return;
3629     }
3630
3631     node->flags |= TOPO_NODE_END_OF_STREAM;
3632
3633     if (session->presentation.flags & SESSION_FLAG_END_OF_PRESENTATION &&
3634             session_nodes_is_mask_set(session, MF_TOPOLOGY_OUTPUT_NODE, TOPO_NODE_END_OF_STREAM))
3635     {
3636         session_set_topo_status(session, S_OK, MF_TOPOSTATUS_ENDED);
3637         session_set_caps(session, session->caps & ~MFSESSIONCAP_PAUSE);
3638         session_stop(session);
3639     }
3640 }
3641
3642 static void session_sink_stream_scrub_complete(struct media_session *session, IMFStreamSink *stream_sink)
3643 {
3644     struct topo_node *node;
3645
3646     if (!(node = session_get_node_object(session, (IUnknown *)stream_sink, MF_TOPOLOGY_OUTPUT_NODE))
3647             || node->flags & TOPO_NODE_SCRUB_SAMPLE_COMPLETE)
3648     {
3649         return;
3650     }
3651
3652     node->flags |= TOPO_NODE_SCRUB_SAMPLE_COMPLETE;
3653
3654     /* Scrubbing event is not limited to the started state transition, or even the started state.
3655        Events are processed and forwarded at any point after transition from initial idle state. */
3656     if (session->presentation.flags & SESSION_FLAG_SOURCES_SUBSCRIBED &&
3657             session_nodes_is_mask_set(session, MF_TOPOLOGY_OUTPUT_NODE, TOPO_NODE_SCRUB_SAMPLE_COMPLETE))
3658     {
3659         IMFMediaEventQueue_QueueEventParamVar(session->event_queue, MESessionScrubSampleComplete, &GUID_NULL, S_OK, NULL);
3660         session_nodes_unset_mask(session, MF_TOPOLOGY_OUTPUT_NODE, TOPO_NODE_SCRUB_SAMPLE_COMPLETE);
3661     }
3662 }
3663
3664 static HRESULT WINAPI session_events_callback_Invoke(IMFAsyncCallback *iface, IMFAsyncResult *result)
3665 {
3666     struct media_session *session = impl_from_events_callback_IMFAsyncCallback(iface);
3667     IMFMediaEventGenerator *event_source;
3668     IMFMediaEvent *event = NULL;
3669     MediaEventType event_type;
3670     IUnknown *object = NULL;
3671     IMFMediaSource *source;
3672     IMFMediaStream *stream;
3673     PROPVARIANT value;
3674     HRESULT hr;
3675
3676     if (FAILED(hr = IMFAsyncResult_GetState(result, (IUnknown **)&event_source)))
3677         return hr;
3678
3679     if (FAILED(hr = IMFMediaEventGenerator_EndGetEvent(event_source, result, &event)))
3680     {
3681         WARN("Failed to get event from %p, hr %#lx.\n", event_source, hr);
3682         IMFMediaEventQueue_QueueEventParamVar(session->event_queue, MEError, &GUID_NULL, hr, NULL);
3683         IMFMediaEventGenerator_Release(event_source);
3684         return hr;
3685     }
3686
3687     if (FAILED(hr = IMFMediaEvent_GetType(event, &event_type)))
3688     {
3689         WARN("Failed to get event type, hr %#lx.\n", hr);
3690         goto failed;
3691     }
3692
3693     value.vt = VT_EMPTY;
3694     if (FAILED(hr = IMFMediaEvent_GetValue(event, &value)))
3695     {
3696         WARN("Failed to get event value, hr %#lx.\n", hr);
3697         goto failed;
3698     }
3699
3700     switch (event_type)
3701     {
3702         case MESourceSeeked:
3703         case MEStreamSeeked:
3704             FIXME("Source/stream seeking, semi-stub!\n");
3705             /* fallthrough */
3706         case MESourceStarted:
3707         case MESourcePaused:
3708         case MESourceStopped:
3709         case MEStreamStarted:
3710         case MEStreamPaused:
3711         case MEStreamStopped:
3712
3713             EnterCriticalSection(&session->cs);
3714             session_set_source_object_state(session, (IUnknown *)event_source, event_type);
3715             LeaveCriticalSection(&session->cs);
3716
3717             break;
3718
3719         case MESourceRateChanged:
3720
3721             EnterCriticalSection(&session->cs);
3722             session_complete_rate_change(session);
3723             LeaveCriticalSection(&session->cs);
3724
3725             break;
3726
3727         case MEBufferingStarted:
3728         case MEBufferingStopped:
3729
3730             EnterCriticalSection(&session->cs);
3731             if (session_get_media_source(session, (IMFMediaSource *)event_source))
3732             {
3733                 if (event_type == MEBufferingStarted)
3734                     IMFPresentationClock_Pause(session->clock);
3735                 else
3736                     IMFPresentationClock_Start(session->clock, PRESENTATION_CURRENT_POSITION);
3737
3738                 IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3739             }
3740             LeaveCriticalSection(&session->cs);
3741             break;
3742
3743         case MEReconnectStart:
3744         case MEReconnectEnd:
3745
3746             EnterCriticalSection(&session->cs);
3747             if (session_get_media_source(session, (IMFMediaSource *)event_source))
3748                 IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3749             LeaveCriticalSection(&session->cs);
3750             break;
3751
3752         case MEExtendedType:
3753         case MERendererEvent:
3754         case MEStreamSinkFormatChanged:
3755
3756             IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3757             break;
3758
3759         case MENewStream:
3760             stream = (IMFMediaStream *)value.punkVal;
3761
3762             if (value.vt != VT_UNKNOWN || !stream)
3763             {
3764                 WARN("Unexpected event value.\n");
3765                 break;
3766             }
3767
3768             if (FAILED(hr = IMFMediaStream_GetMediaSource(stream, &source)))
3769                 break;
3770
3771             EnterCriticalSection(&session->cs);
3772             if (SUCCEEDED(hr = session_add_media_stream(session, source, stream)))
3773                 hr = IMFMediaStream_BeginGetEvent(stream, &session->events_callback, (IUnknown *)stream);
3774             LeaveCriticalSection(&session->cs);
3775
3776             IMFMediaSource_Release(source);
3777
3778             break;
3779         case MEStreamSinkStarted:
3780         case MEStreamSinkPaused:
3781         case MEStreamSinkStopped:
3782         case MEStreamSinkPrerolled:
3783
3784             EnterCriticalSection(&session->cs);
3785             session_set_sink_stream_state(session, (IMFStreamSink *)event_source, event_type);
3786             LeaveCriticalSection(&session->cs);
3787
3788             break;
3789         case MEStreamSinkMarker:
3790
3791             EnterCriticalSection(&session->cs);
3792             session_sink_stream_marker(session, (IMFStreamSink *)event_source);
3793             LeaveCriticalSection(&session->cs);
3794
3795             break;
3796         case MEStreamSinkRequestSample:
3797
3798             EnterCriticalSection(&session->cs);
3799             session_request_sample(session, (IMFStreamSink *)event_source);
3800             LeaveCriticalSection(&session->cs);
3801
3802             break;
3803         case MEStreamSinkScrubSampleComplete:
3804
3805             EnterCriticalSection(&session->cs);
3806             session_sink_stream_scrub_complete(session, (IMFStreamSink *)event_source);
3807             LeaveCriticalSection(&session->cs);
3808             break;
3809         case MEMediaSample:
3810
3811             EnterCriticalSection(&session->cs);
3812             session_deliver_sample(session, (IMFMediaStream *)event_source, &value);
3813             LeaveCriticalSection(&session->cs);
3814
3815             break;
3816         case MEEndOfStream:
3817
3818             EnterCriticalSection(&session->cs);
3819             session_handle_end_of_stream(session, (IMFMediaStream *)event_source);
3820             LeaveCriticalSection(&session->cs);
3821
3822             break;
3823
3824         case MEEndOfPresentation:
3825
3826             EnterCriticalSection(&session->cs);
3827             session_handle_end_of_presentation(session, (IMFMediaSource *)event_source);
3828             LeaveCriticalSection(&session->cs);
3829
3830             break;
3831         case MEAudioSessionGroupingParamChanged:
3832         case MEAudioSessionIconChanged:
3833         case MEAudioSessionNameChanged:
3834         case MEAudioSessionVolumeChanged:
3835
3836             IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3837
3838             break;
3839         case MEAudioSessionDeviceRemoved:
3840         case MEAudioSessionDisconnected:
3841         case MEAudioSessionExclusiveModeOverride:
3842         case MEAudioSessionFormatChanged:
3843         case MEAudioSessionServerShutdown:
3844
3845             IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3846             /* fallthrough */
3847         case MESinkInvalidated:
3848
3849             EnterCriticalSection(&session->cs);
3850             session_sink_invalidated(session, event_type == MESinkInvalidated ? event : NULL,
3851                     (IMFStreamSink *)event_source);
3852             LeaveCriticalSection(&session->cs);
3853
3854             break;
3855         case MEQualityNotify:
3856
3857             if (session->quality_manager)
3858             {
3859                 if (FAILED(IMFMediaEventGenerator_QueryInterface(event_source, &IID_IMFStreamSink, (void **)&object)))
3860                     IMFMediaEventGenerator_QueryInterface(event_source, &IID_IMFTransform, (void **)&object);
3861
3862                 if (object)
3863                 {
3864                     IMFQualityManager_NotifyQualityEvent(session->quality_manager, object, event);
3865                     IUnknown_Release(object);
3866                 }
3867             }
3868
3869             break;
3870         default:
3871             ;
3872     }
3873
3874     PropVariantClear(&value);
3875
3876 failed:
3877
3878     if (FAILED(hr = IMFMediaEventGenerator_BeginGetEvent(event_source, iface, (IUnknown *)event_source)))
3879     {
3880         WARN("Failed to re-subscribe, hr %#lx.\n", hr);
3881         IMFMediaEventQueue_QueueEvent(session->event_queue, event);
3882     }
3883
3884     if (event)
3885         IMFMediaEvent_Release(event);
3886
3887     IMFMediaEventGenerator_Release(event_source);
3888
3889     return hr;
3890 }
3891
3892 static const IMFAsyncCallbackVtbl session_events_callback_vtbl =
3893 {
3894     session_events_callback_QueryInterface,
3895     session_events_callback_AddRef,
3896     session_events_callback_Release,
3897     session_events_callback_GetParameters,
3898     session_events_callback_Invoke,
3899 };
3900
3901 static HRESULT WINAPI session_sink_finalizer_callback_QueryInterface(IMFAsyncCallback *iface, REFIID riid, void **obj)
3902 {
3903     if (IsEqualIID(riid, &IID_IMFAsyncCallback) ||
3904             IsEqualIID(riid, &IID_IUnknown))
3905     {
3906         *obj = iface;
3907         IMFAsyncCallback_AddRef(iface);
3908         return S_OK;
3909     }
3910
3911     WARN("Unsupported %s.\n", debugstr_guid(riid));
3912     *obj = NULL;
3913     return E_NOINTERFACE;
3914 }
3915
3916 static ULONG WINAPI session_sink_finalizer_callback_AddRef(IMFAsyncCallback *iface)
3917 {
3918     struct media_session *session = impl_from_sink_finalizer_callback_IMFAsyncCallback(iface);
3919     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
3920 }
3921
3922 static ULONG WINAPI session_sink_finalizer_callback_Release(IMFAsyncCallback *iface)
3923 {
3924     struct media_session *session = impl_from_sink_finalizer_callback_IMFAsyncCallback(iface);
3925     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
3926 }
3927
3928 static HRESULT WINAPI session_sink_finalizer_callback_GetParameters(IMFAsyncCallback *iface, DWORD *flags, DWORD *queue)
3929 {
3930     return E_NOTIMPL;
3931 }
3932
3933 static HRESULT WINAPI session_sink_finalizer_callback_Invoke(IMFAsyncCallback *iface, IMFAsyncResult *result)
3934 {
3935     struct media_session *session = impl_from_sink_finalizer_callback_IMFAsyncCallback(iface);
3936     IMFFinalizableMediaSink *fin_sink = NULL;
3937     BOOL sinks_finalized = TRUE;
3938     struct media_sink *sink;
3939     IUnknown *state;
3940     HRESULT hr;
3941
3942     if (FAILED(hr = IMFAsyncResult_GetState(result, &state)))
3943         return hr;
3944
3945     EnterCriticalSection(&session->cs);
3946
3947     LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
3948     {
3949         if (state == sink->object)
3950         {
3951             if (FAILED(hr = IMFMediaSink_QueryInterface(sink->sink, &IID_IMFFinalizableMediaSink, (void **)&fin_sink)))
3952                 WARN("Unexpected, missing IMFFinalizableMediaSink, hr %#lx.\n", hr);
3953         }
3954         else
3955         {
3956             sinks_finalized &= sink->finalized;
3957             if (!sinks_finalized)
3958                 break;
3959         }
3960     }
3961
3962     IUnknown_Release(state);
3963
3964     if (fin_sink)
3965     {
3966         /* Complete session transition, or close prematurely on error. */
3967         if (SUCCEEDED(hr = IMFFinalizableMediaSink_EndFinalize(fin_sink, result)))
3968         {
3969             sink->finalized = TRUE;
3970             if (sinks_finalized)
3971                 session_set_closed(session, hr);
3972         }
3973         IMFFinalizableMediaSink_Release(fin_sink);
3974     }
3975
3976     LeaveCriticalSection(&session->cs);
3977
3978     return S_OK;
3979 }
3980
3981 static const IMFAsyncCallbackVtbl session_sink_finalizer_callback_vtbl =
3982 {
3983     session_sink_finalizer_callback_QueryInterface,
3984     session_sink_finalizer_callback_AddRef,
3985     session_sink_finalizer_callback_Release,
3986     session_sink_finalizer_callback_GetParameters,
3987     session_sink_finalizer_callback_Invoke,
3988 };
3989
3990 static HRESULT WINAPI session_rate_support_QueryInterface(IMFRateSupport *iface, REFIID riid, void **obj)
3991 {
3992     struct media_session *session = impl_session_from_IMFRateSupport(iface);
3993     return IMFMediaSession_QueryInterface(&session->IMFMediaSession_iface, riid, obj);
3994 }
3995
3996 static ULONG WINAPI session_rate_support_AddRef(IMFRateSupport *iface)
3997 {
3998     struct media_session *session = impl_session_from_IMFRateSupport(iface);
3999     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
4000 }
4001
4002 static ULONG WINAPI session_rate_support_Release(IMFRateSupport *iface)
4003 {
4004     struct media_session *session = impl_session_from_IMFRateSupport(iface);
4005     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
4006 }
4007
4008 static HRESULT session_presentation_object_get_rate(IUnknown *object, MFRATE_DIRECTION direction,
4009         BOOL thin, BOOL fastest, float *result)
4010 {
4011     IMFRateSupport *rate_support;
4012     float rate;
4013     HRESULT hr;
4014
4015     /* For objects that don't support rate control, it's assumed that only forward direction is allowed, at 1.0f. */
4016
4017     if (FAILED(hr = MFGetService(object, &MF_RATE_CONTROL_SERVICE, &IID_IMFRateSupport, (void **)&rate_support)))
4018     {
4019         if (direction == MFRATE_FORWARD)
4020         {
4021             *result = 1.0f;
4022             return S_OK;
4023         }
4024         else
4025             return MF_E_REVERSE_UNSUPPORTED;
4026     }
4027
4028     rate = 0.0f;
4029     if (fastest)
4030     {
4031         if (SUCCEEDED(hr = IMFRateSupport_GetFastestRate(rate_support, direction, thin, &rate)))
4032             *result = min(fabsf(rate), *result);
4033     }
4034     else
4035     {
4036         if (SUCCEEDED(hr = IMFRateSupport_GetSlowestRate(rate_support, direction, thin, &rate)))
4037             *result = max(fabsf(rate), *result);
4038     }
4039
4040     IMFRateSupport_Release(rate_support);
4041
4042     return hr;
4043 }
4044
4045 static HRESULT session_get_presentation_rate(struct media_session *session, MFRATE_DIRECTION direction,
4046         BOOL thin, BOOL fastest, float *result)
4047 {
4048     struct media_source *source;
4049     struct media_sink *sink;
4050     HRESULT hr = E_POINTER;
4051     float rate;
4052
4053     rate = fastest ? FLT_MAX : 0.0f;
4054
4055     EnterCriticalSection(&session->cs);
4056
4057     if (session->presentation.topo_status != MF_TOPOSTATUS_INVALID)
4058     {
4059         LIST_FOR_EACH_ENTRY(source, &session->presentation.sources, struct media_source, entry)
4060         {
4061             if (FAILED(hr = session_presentation_object_get_rate(source->object, direction, thin, fastest, &rate)))
4062                 break;
4063         }
4064
4065         if (SUCCEEDED(hr))
4066         {
4067             LIST_FOR_EACH_ENTRY(sink, &session->presentation.sinks, struct media_sink, entry)
4068             {
4069                 if (FAILED(hr = session_presentation_object_get_rate(sink->object, direction, thin, fastest, &rate)))
4070                     break;
4071             }
4072         }
4073     }
4074
4075     LeaveCriticalSection(&session->cs);
4076
4077     if (SUCCEEDED(hr))
4078         *result = direction == MFRATE_FORWARD ? rate : -rate;
4079
4080     return hr;
4081 }
4082
4083 static HRESULT WINAPI session_rate_support_GetSlowestRate(IMFRateSupport *iface, MFRATE_DIRECTION direction,
4084         BOOL thin, float *rate)
4085 {
4086     struct media_session *session = impl_session_from_IMFRateSupport(iface);
4087
4088     TRACE("%p, %d, %d, %p.\n", iface, direction, thin, rate);
4089
4090     return session_get_presentation_rate(session, direction, thin, FALSE, rate);
4091 }
4092
4093 static HRESULT WINAPI session_rate_support_GetFastestRate(IMFRateSupport *iface, MFRATE_DIRECTION direction,
4094         BOOL thin, float *rate)
4095 {
4096     struct media_session *session = impl_session_from_IMFRateSupport(iface);
4097
4098     TRACE("%p, %d, %d, %p.\n", iface, direction, thin, rate);
4099
4100     return session_get_presentation_rate(session, direction, thin, TRUE, rate);
4101 }
4102
4103 static HRESULT WINAPI session_rate_support_IsRateSupported(IMFRateSupport *iface, BOOL thin, float rate,
4104         float *nearest_supported_rate)
4105 {
4106     struct media_session *session = impl_session_from_IMFRateSupport(iface);
4107     HRESULT hr;
4108
4109     TRACE("%p, %d, %f, %p.\n", iface, thin, rate, nearest_supported_rate);
4110
4111     EnterCriticalSection(&session->cs);
4112     hr = session_is_presentation_rate_supported(session, thin, rate, nearest_supported_rate);
4113     LeaveCriticalSection(&session->cs);
4114
4115     return hr;
4116 }
4117
4118 static const IMFRateSupportVtbl session_rate_support_vtbl =
4119 {
4120     session_rate_support_QueryInterface,
4121     session_rate_support_AddRef,
4122     session_rate_support_Release,
4123     session_rate_support_GetSlowestRate,
4124     session_rate_support_GetFastestRate,
4125     session_rate_support_IsRateSupported,
4126 };
4127
4128 static HRESULT WINAPI session_rate_control_QueryInterface(IMFRateControl *iface, REFIID riid, void **obj)
4129 {
4130     struct media_session *session = impl_session_from_IMFRateControl(iface);
4131     return IMFMediaSession_QueryInterface(&session->IMFMediaSession_iface, riid, obj);
4132 }
4133
4134 static ULONG WINAPI session_rate_control_AddRef(IMFRateControl *iface)
4135 {
4136     struct media_session *session = impl_session_from_IMFRateControl(iface);
4137     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
4138 }
4139
4140 static ULONG WINAPI session_rate_control_Release(IMFRateControl *iface)
4141 {
4142     struct media_session *session = impl_session_from_IMFRateControl(iface);
4143     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
4144 }
4145
4146 static HRESULT WINAPI session_rate_control_SetRate(IMFRateControl *iface, BOOL thin, float rate)
4147 {
4148     struct media_session *session = impl_session_from_IMFRateControl(iface);
4149     struct session_op *op;
4150     HRESULT hr;
4151
4152     TRACE("%p, %d, %f.\n", iface, thin, rate);
4153
4154     if (FAILED(hr = create_session_op(SESSION_CMD_SET_RATE, &op)))
4155         return hr;
4156
4157     op->set_rate.thin = thin;
4158     op->set_rate.rate = rate;
4159     hr = session_submit_command(session, op);
4160     IUnknown_Release(&op->IUnknown_iface);
4161     return hr;
4162 }
4163
4164 static HRESULT WINAPI session_rate_control_GetRate(IMFRateControl *iface, BOOL *thin, float *rate)
4165 {
4166     struct media_session *session = impl_session_from_IMFRateControl(iface);
4167
4168     TRACE("%p, %p, %p.\n", iface, thin, rate);
4169
4170     return IMFRateControl_GetRate(session->clock_rate_control, thin, rate);
4171 }
4172
4173 static const IMFRateControlVtbl session_rate_control_vtbl =
4174 {
4175     session_rate_control_QueryInterface,
4176     session_rate_control_AddRef,
4177     session_rate_control_Release,
4178     session_rate_control_SetRate,
4179     session_rate_control_GetRate,
4180 };
4181
4182 static HRESULT WINAPI node_attribute_editor_QueryInterface(IMFTopologyNodeAttributeEditor *iface,
4183         REFIID riid, void **obj)
4184 {
4185     TRACE("%p, %s, %p.\n", iface, debugstr_guid(riid), obj);
4186
4187     if (IsEqualIID(riid, &IID_IMFTopologyNodeAttributeEditor) ||
4188             IsEqualIID(riid, &IID_IUnknown))
4189     {
4190         *obj = iface;
4191         IMFTopologyNodeAttributeEditor_AddRef(iface);
4192         return S_OK;
4193     }
4194
4195     WARN("Unsupported interface %s.\n", debugstr_guid(riid));
4196     *obj = NULL;
4197     return E_NOINTERFACE;
4198 }
4199
4200 static ULONG WINAPI node_attribute_editor_AddRef(IMFTopologyNodeAttributeEditor *iface)
4201 {
4202     struct media_session *session = impl_session_from_IMFTopologyNodeAttributeEditor(iface);
4203     return IMFMediaSession_AddRef(&session->IMFMediaSession_iface);
4204 }
4205
4206 static ULONG WINAPI node_attribute_editor_Release(IMFTopologyNodeAttributeEditor *iface)
4207 {
4208     struct media_session *session = impl_session_from_IMFTopologyNodeAttributeEditor(iface);
4209     return IMFMediaSession_Release(&session->IMFMediaSession_iface);
4210 }
4211
4212 static HRESULT WINAPI node_attribute_editor_UpdateNodeAttributes(IMFTopologyNodeAttributeEditor *iface,
4213         TOPOID id, DWORD count, MFTOPONODE_ATTRIBUTE_UPDATE *updates)
4214 {
4215     FIXME("%p, %s, %lu, %p.\n", iface, wine_dbgstr_longlong(id), count, updates);
4216
4217     return E_NOTIMPL;
4218 }
4219
4220 static const IMFTopologyNodeAttributeEditorVtbl node_attribute_editor_vtbl =
4221 {
4222     node_attribute_editor_QueryInterface,
4223     node_attribute_editor_AddRef,
4224     node_attribute_editor_Release,
4225     node_attribute_editor_UpdateNodeAttributes,
4226 };
4227
4228 /***********************************************************************
4229  *      MFCreateMediaSession (mf.@)
4230  */
4231 HRESULT WINAPI MFCreateMediaSession(IMFAttributes *config, IMFMediaSession **session)
4232 {
4233     BOOL without_quality_manager = FALSE;
4234     struct media_session *object;
4235     HRESULT hr;
4236
4237     TRACE("%p, %p.\n", config, session);
4238
4239     if (!(object = calloc(1, sizeof(*object))))
4240         return E_OUTOFMEMORY;
4241
4242     object->IMFMediaSession_iface.lpVtbl = &mfmediasessionvtbl;
4243     object->IMFGetService_iface.lpVtbl = &session_get_service_vtbl;
4244     object->IMFRateSupport_iface.lpVtbl = &session_rate_support_vtbl;
4245     object->IMFRateControl_iface.lpVtbl = &session_rate_control_vtbl;
4246     object->IMFTopologyNodeAttributeEditor_iface.lpVtbl = &node_attribute_editor_vtbl;
4247     object->commands_callback.lpVtbl = &session_commands_callback_vtbl;
4248     object->sa_ready_callback.lpVtbl = &session_sa_ready_callback_vtbl;
4249     object->events_callback.lpVtbl = &session_events_callback_vtbl;
4250     object->sink_finalizer_callback.lpVtbl = &session_sink_finalizer_callback_vtbl;
4251     object->refcount = 1;
4252     list_init(&object->topologies);
4253     list_init(&object->commands);
4254     list_init(&object->presentation.sources);
4255     list_init(&object->presentation.sinks);
4256     list_init(&object->presentation.nodes);
4257     InitializeCriticalSection(&object->cs);
4258
4259     if (FAILED(hr = MFCreateTopology(&object->presentation.current_topology)))
4260         goto failed;
4261
4262     if (FAILED(hr = MFCreateEventQueue(&object->event_queue)))
4263         goto failed;
4264
4265     if (FAILED(hr = MFCreatePresentationClock(&object->clock)))
4266         goto failed;
4267
4268     if (FAILED(hr = MFCreateSystemTimeSource(&object->system_time_source)))
4269         goto failed;
4270
4271     if (FAILED(hr = IMFPresentationClock_QueryInterface(object->clock, &IID_IMFRateControl,
4272             (void **)&object->clock_rate_control)))
4273     {
4274         goto failed;
4275     }
4276
4277     if (config)
4278     {
4279         GUID clsid;
4280
4281         if (SUCCEEDED(IMFAttributes_GetGUID(config, &MF_SESSION_TOPOLOADER, &clsid)))
4282         {
4283             if (FAILED(hr = CoCreateInstance(&clsid, NULL, CLSCTX_INPROC_SERVER, &IID_IMFTopoLoader,
4284                     (void **)&object->topo_loader)))
4285             {
4286                 WARN("Failed to create custom topology loader, hr %#lx.\n", hr);
4287             }
4288         }
4289
4290         if (SUCCEEDED(IMFAttributes_GetGUID(config, &MF_SESSION_QUALITY_MANAGER, &clsid)))
4291         {
4292             if (!(without_quality_manager = IsEqualGUID(&clsid, &GUID_NULL)))
4293             {
4294                 if (FAILED(hr = CoCreateInstance(&clsid, NULL, CLSCTX_INPROC_SERVER, &IID_IMFQualityManager,
4295                         (void **)&object->quality_manager)))
4296                 {
4297                     WARN("Failed to create custom quality manager, hr %#lx.\n", hr);
4298                 }
4299             }
4300         }
4301     }
4302
4303     if (!object->topo_loader && FAILED(hr = MFCreateTopoLoader(&object->topo_loader)))
4304         goto failed;
4305
4306     if (!object->quality_manager && !without_quality_manager &&
4307             FAILED(hr = MFCreateStandardQualityManager(&object->quality_manager)))
4308     {
4309         goto failed;
4310     }
4311
4312     if (object->quality_manager && FAILED(hr = IMFQualityManager_NotifyPresentationClock(object->quality_manager,
4313             object->clock)))
4314     {
4315         goto failed;
4316     }
4317
4318     *session = &object->IMFMediaSession_iface;
4319
4320     return S_OK;
4321
4322 failed:
4323     IMFMediaSession_Release(&object->IMFMediaSession_iface);
4324     return hr;
4325 }