Alc/backends/pulseaudio.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 2009 by Konstantinos Natsakis <konstantinos.natsakis@gmail.com>
   4  * Copyright (C) 2010 by Chris Robinson <chris.kcat@gmail.com>
   5  * This library is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU Library General Public
   7  *  License as published by the Free Software Foundation; either
   8  *  version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  *  License along with this library; if not, write to the
  17  *  Free Software Foundation, Inc.,
  18  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  * Or go to http://www.gnu.org/copyleft/lgpl.html
  20  */
  21
  22 #include "config.h"
  23
  24 #include <string.h>
  25
  26 #include "alMain.h"
  27 #include "alu.h"
  28 #include "threads.h"
  29 #include "compat.h"
  30
  31 #include "backends/base.h"
  32
  33 #include <pulse/pulseaudio.h>
  34
  35 #if PA_API_VERSION == 12
  36
  37 #ifdef HAVE_DYNLOAD
  38 static void *pa_handle;
  39 #define MAKE_FUNC(x) static __typeof(x) * p##x
  40 MAKE_FUNC(pa_context_unref);
  41 MAKE_FUNC(pa_sample_spec_valid);
  42 MAKE_FUNC(pa_frame_size);
  43 MAKE_FUNC(pa_stream_drop);
  44 MAKE_FUNC(pa_strerror);
  45 MAKE_FUNC(pa_context_get_state);
  46 MAKE_FUNC(pa_stream_get_state);
  47 MAKE_FUNC(pa_threaded_mainloop_signal);
  48 MAKE_FUNC(pa_stream_peek);
  49 MAKE_FUNC(pa_threaded_mainloop_wait);
  50 MAKE_FUNC(pa_threaded_mainloop_unlock);
  51 MAKE_FUNC(pa_threaded_mainloop_in_thread);
  52 MAKE_FUNC(pa_context_new);
  53 MAKE_FUNC(pa_threaded_mainloop_stop);
  54 MAKE_FUNC(pa_context_disconnect);
  55 MAKE_FUNC(pa_threaded_mainloop_start);
  56 MAKE_FUNC(pa_threaded_mainloop_get_api);
  57 MAKE_FUNC(pa_context_set_state_callback);
  58 MAKE_FUNC(pa_stream_write);
  59 MAKE_FUNC(pa_xfree);
  60 MAKE_FUNC(pa_stream_connect_record);
  61 MAKE_FUNC(pa_stream_connect_playback);
  62 MAKE_FUNC(pa_stream_readable_size);
  63 MAKE_FUNC(pa_stream_writable_size);
  64 MAKE_FUNC(pa_stream_is_corked);
  65 MAKE_FUNC(pa_stream_cork);
  66 MAKE_FUNC(pa_stream_is_suspended);
  67 MAKE_FUNC(pa_stream_get_device_name);
  68 MAKE_FUNC(pa_stream_get_latency);
  69 MAKE_FUNC(pa_path_get_filename);
  70 MAKE_FUNC(pa_get_binary_name);
  71 MAKE_FUNC(pa_threaded_mainloop_free);
  72 MAKE_FUNC(pa_context_errno);
  73 MAKE_FUNC(pa_xmalloc);
  74 MAKE_FUNC(pa_stream_unref);
  75 MAKE_FUNC(pa_threaded_mainloop_accept);
  76 MAKE_FUNC(pa_stream_set_write_callback);
  77 MAKE_FUNC(pa_threaded_mainloop_new);
  78 MAKE_FUNC(pa_context_connect);
  79 MAKE_FUNC(pa_stream_set_buffer_attr);
  80 MAKE_FUNC(pa_stream_get_buffer_attr);
  81 MAKE_FUNC(pa_stream_get_sample_spec);
  82 MAKE_FUNC(pa_stream_get_time);
  83 MAKE_FUNC(pa_stream_set_read_callback);
  84 MAKE_FUNC(pa_stream_set_state_callback);
  85 MAKE_FUNC(pa_stream_set_moved_callback);
  86 MAKE_FUNC(pa_stream_set_underflow_callback);
  87 MAKE_FUNC(pa_stream_new_with_proplist);
  88 MAKE_FUNC(pa_stream_disconnect);
  89 MAKE_FUNC(pa_threaded_mainloop_lock);
  90 MAKE_FUNC(pa_channel_map_init_auto);
  91 MAKE_FUNC(pa_channel_map_parse);
  92 MAKE_FUNC(pa_channel_map_snprint);
  93 MAKE_FUNC(pa_channel_map_equal);
  94 MAKE_FUNC(pa_context_get_server_info);
  95 MAKE_FUNC(pa_context_get_sink_info_by_name);
  96 MAKE_FUNC(pa_context_get_sink_info_list);
  97 MAKE_FUNC(pa_context_get_source_info_by_name);
  98 MAKE_FUNC(pa_context_get_source_info_list);
  99 MAKE_FUNC(pa_operation_get_state);
 100 MAKE_FUNC(pa_operation_unref);
 101 MAKE_FUNC(pa_proplist_new);
 102 MAKE_FUNC(pa_proplist_free);
 103 MAKE_FUNC(pa_proplist_set);
 104 MAKE_FUNC(pa_channel_map_superset);
 105 MAKE_FUNC(pa_stream_set_buffer_attr_callback);
 106 MAKE_FUNC(pa_stream_begin_write);
 107 #undef MAKE_FUNC
 108
 109 #define pa_context_unref ppa_context_unref
 110 #define pa_sample_spec_valid ppa_sample_spec_valid
 111 #define pa_frame_size ppa_frame_size
 112 #define pa_stream_drop ppa_stream_drop
 113 #define pa_strerror ppa_strerror
 114 #define pa_context_get_state ppa_context_get_state
 115 #define pa_stream_get_state ppa_stream_get_state
 116 #define pa_threaded_mainloop_signal ppa_threaded_mainloop_signal
 117 #define pa_stream_peek ppa_stream_peek
 118 #define pa_threaded_mainloop_wait ppa_threaded_mainloop_wait
 119 #define pa_threaded_mainloop_unlock ppa_threaded_mainloop_unlock
 120 #define pa_threaded_mainloop_in_thread ppa_threaded_mainloop_in_thread
 121 #define pa_context_new ppa_context_new
 122 #define pa_threaded_mainloop_stop ppa_threaded_mainloop_stop
 123 #define pa_context_disconnect ppa_context_disconnect
 124 #define pa_threaded_mainloop_start ppa_threaded_mainloop_start
 125 #define pa_threaded_mainloop_get_api ppa_threaded_mainloop_get_api
 126 #define pa_context_set_state_callback ppa_context_set_state_callback
 127 #define pa_stream_write ppa_stream_write
 128 #define pa_xfree ppa_xfree
 129 #define pa_stream_connect_record ppa_stream_connect_record
 130 #define pa_stream_connect_playback ppa_stream_connect_playback
 131 #define pa_stream_readable_size ppa_stream_readable_size
 132 #define pa_stream_writable_size ppa_stream_writable_size
 133 #define pa_stream_is_corked ppa_stream_is_corked
 134 #define pa_stream_cork ppa_stream_cork
 135 #define pa_stream_is_suspended ppa_stream_is_suspended
 136 #define pa_stream_get_device_name ppa_stream_get_device_name
 137 #define pa_stream_get_latency ppa_stream_get_latency
 138 #define pa_path_get_filename ppa_path_get_filename
 139 #define pa_get_binary_name ppa_get_binary_name
 140 #define pa_threaded_mainloop_free ppa_threaded_mainloop_free
 141 #define pa_context_errno ppa_context_errno
 142 #define pa_xmalloc ppa_xmalloc
 143 #define pa_stream_unref ppa_stream_unref
 144 #define pa_threaded_mainloop_accept ppa_threaded_mainloop_accept
 145 #define pa_stream_set_write_callback ppa_stream_set_write_callback
 146 #define pa_threaded_mainloop_new ppa_threaded_mainloop_new
 147 #define pa_context_connect ppa_context_connect
 148 #define pa_stream_set_buffer_attr ppa_stream_set_buffer_attr
 149 #define pa_stream_get_buffer_attr ppa_stream_get_buffer_attr
 150 #define pa_stream_get_sample_spec ppa_stream_get_sample_spec
 151 #define pa_stream_get_time ppa_stream_get_time
 152 #define pa_stream_set_read_callback ppa_stream_set_read_callback
 153 #define pa_stream_set_state_callback ppa_stream_set_state_callback
 154 #define pa_stream_set_moved_callback ppa_stream_set_moved_callback
 155 #define pa_stream_set_underflow_callback ppa_stream_set_underflow_callback
 156 #define pa_stream_new_with_proplist ppa_stream_new_with_proplist
 157 #define pa_stream_disconnect ppa_stream_disconnect
 158 #define pa_threaded_mainloop_lock ppa_threaded_mainloop_lock
 159 #define pa_channel_map_init_auto ppa_channel_map_init_auto
 160 #define pa_channel_map_parse ppa_channel_map_parse
 161 #define pa_channel_map_snprint ppa_channel_map_snprint
 162 #define pa_channel_map_equal ppa_channel_map_equal
 163 #define pa_context_get_server_info ppa_context_get_server_info
 164 #define pa_context_get_sink_info_by_name ppa_context_get_sink_info_by_name
 165 #define pa_context_get_sink_info_list ppa_context_get_sink_info_list
 166 #define pa_context_get_source_info_by_name ppa_context_get_source_info_by_name
 167 #define pa_context_get_source_info_list ppa_context_get_source_info_list
 168 #define pa_operation_get_state ppa_operation_get_state
 169 #define pa_operation_unref ppa_operation_unref
 170 #define pa_proplist_new ppa_proplist_new
 171 #define pa_proplist_free ppa_proplist_free
 172 #define pa_proplist_set ppa_proplist_set
 173 #define pa_channel_map_superset ppa_channel_map_superset
 174 #define pa_stream_set_buffer_attr_callback ppa_stream_set_buffer_attr_callback
 175 #define pa_stream_begin_write ppa_stream_begin_write
 176
 177 #endif
 178
 179 static ALCboolean pulse_load(void)
 180 {
 181     ALCboolean ret = ALC_TRUE;
 182 #ifdef HAVE_DYNLOAD
 183     if(!pa_handle)
 184     {
 185         al_string missing_funcs = AL_STRING_INIT_STATIC();
 186
 187 #ifdef _WIN32
 188 #define PALIB "libpulse-0.dll"
 189 #elif defined(__APPLE__) && defined(__MACH__)
 190 #define PALIB "libpulse.0.dylib"
 191 #else
 192 #define PALIB "libpulse.so.0"
 193 #endif
 194         pa_handle = LoadLib(PALIB);
 195         if(!pa_handle)
 196         {
 197             WARN("Failed to load %s\n", PALIB);
 198             return ALC_FALSE;
 199         }
 200
 201 #define LOAD_FUNC(x) do {                                                     \
 202     p##x = GetSymbol(pa_handle, #x);                                          \
 203     if(!(p##x)) {                                                             \
 204         ret = ALC_FALSE;                                                      \
 205         alstr_append_cstr(&missing_funcs, "\n" #x);                           \
 206     }                                                                         \
 207 } while(0)
 208         LOAD_FUNC(pa_context_unref);
 209         LOAD_FUNC(pa_sample_spec_valid);
 210         LOAD_FUNC(pa_stream_drop);
 211         LOAD_FUNC(pa_frame_size);
 212         LOAD_FUNC(pa_strerror);
 213         LOAD_FUNC(pa_context_get_state);
 214         LOAD_FUNC(pa_stream_get_state);
 215         LOAD_FUNC(pa_threaded_mainloop_signal);
 216         LOAD_FUNC(pa_stream_peek);
 217         LOAD_FUNC(pa_threaded_mainloop_wait);
 218         LOAD_FUNC(pa_threaded_mainloop_unlock);
 219         LOAD_FUNC(pa_threaded_mainloop_in_thread);
 220         LOAD_FUNC(pa_context_new);
 221         LOAD_FUNC(pa_threaded_mainloop_stop);
 222         LOAD_FUNC(pa_context_disconnect);
 223         LOAD_FUNC(pa_threaded_mainloop_start);
 224         LOAD_FUNC(pa_threaded_mainloop_get_api);
 225         LOAD_FUNC(pa_context_set_state_callback);
 226         LOAD_FUNC(pa_stream_write);
 227         LOAD_FUNC(pa_xfree);
 228         LOAD_FUNC(pa_stream_connect_record);
 229         LOAD_FUNC(pa_stream_connect_playback);
 230         LOAD_FUNC(pa_stream_readable_size);
 231         LOAD_FUNC(pa_stream_writable_size);
 232         LOAD_FUNC(pa_stream_is_corked);
 233         LOAD_FUNC(pa_stream_cork);
 234         LOAD_FUNC(pa_stream_is_suspended);
 235         LOAD_FUNC(pa_stream_get_device_name);
 236         LOAD_FUNC(pa_stream_get_latency);
 237         LOAD_FUNC(pa_path_get_filename);
 238         LOAD_FUNC(pa_get_binary_name);
 239         LOAD_FUNC(pa_threaded_mainloop_free);
 240         LOAD_FUNC(pa_context_errno);
 241         LOAD_FUNC(pa_xmalloc);
 242         LOAD_FUNC(pa_stream_unref);
 243         LOAD_FUNC(pa_threaded_mainloop_accept);
 244         LOAD_FUNC(pa_stream_set_write_callback);
 245         LOAD_FUNC(pa_threaded_mainloop_new);
 246         LOAD_FUNC(pa_context_connect);
 247         LOAD_FUNC(pa_stream_set_buffer_attr);
 248         LOAD_FUNC(pa_stream_get_buffer_attr);
 249         LOAD_FUNC(pa_stream_get_sample_spec);
 250         LOAD_FUNC(pa_stream_get_time);
 251         LOAD_FUNC(pa_stream_set_read_callback);
 252         LOAD_FUNC(pa_stream_set_state_callback);
 253         LOAD_FUNC(pa_stream_set_moved_callback);
 254         LOAD_FUNC(pa_stream_set_underflow_callback);
 255         LOAD_FUNC(pa_stream_new_with_proplist);
 256         LOAD_FUNC(pa_stream_disconnect);
 257         LOAD_FUNC(pa_threaded_mainloop_lock);
 258         LOAD_FUNC(pa_channel_map_init_auto);
 259         LOAD_FUNC(pa_channel_map_parse);
 260         LOAD_FUNC(pa_channel_map_snprint);
 261         LOAD_FUNC(pa_channel_map_equal);
 262         LOAD_FUNC(pa_context_get_server_info);
 263         LOAD_FUNC(pa_context_get_sink_info_by_name);
 264         LOAD_FUNC(pa_context_get_sink_info_list);
 265         LOAD_FUNC(pa_context_get_source_info_by_name);
 266         LOAD_FUNC(pa_context_get_source_info_list);
 267         LOAD_FUNC(pa_operation_get_state);
 268         LOAD_FUNC(pa_operation_unref);
 269         LOAD_FUNC(pa_proplist_new);
 270         LOAD_FUNC(pa_proplist_free);
 271         LOAD_FUNC(pa_proplist_set);
 272         LOAD_FUNC(pa_channel_map_superset);
 273         LOAD_FUNC(pa_stream_set_buffer_attr_callback);
 274         LOAD_FUNC(pa_stream_begin_write);
 275 #undef LOAD_FUNC
 276
 277         if(ret == ALC_FALSE)
 278         {
 279             WARN("Missing expected functions:%s\n", alstr_get_cstr(missing_funcs));
 280             CloseLib(pa_handle);
 281             pa_handle = NULL;
 282         }
 283         alstr_reset(&missing_funcs);
 284     }
 285 #endif /* HAVE_DYNLOAD */
 286     return ret;
 287 }
 288
 289
 290 /* Global flags and properties */
 291 static pa_context_flags_t pulse_ctx_flags;
 292 static pa_proplist *prop_filter;
 293
 294
 295 /* PulseAudio Event Callbacks */
 296 static void context_state_callback(pa_context *context, void *pdata)
 297 {
 298     pa_threaded_mainloop *loop = pdata;
 299     pa_context_state_t state;
 300
 301     state = pa_context_get_state(context);
 302     if(state == PA_CONTEXT_READY || !PA_CONTEXT_IS_GOOD(state))
 303         pa_threaded_mainloop_signal(loop, 0);
 304 }
 305
 306 static void stream_state_callback(pa_stream *stream, void *pdata)
 307 {
 308     pa_threaded_mainloop *loop = pdata;
 309     pa_stream_state_t state;
 310
 311     state = pa_stream_get_state(stream);
 312     if(state == PA_STREAM_READY || !PA_STREAM_IS_GOOD(state))
 313         pa_threaded_mainloop_signal(loop, 0);
 314 }
 315
 316 static void stream_success_callback(pa_stream *UNUSED(stream), int UNUSED(success), void *pdata)
 317 {
 318     pa_threaded_mainloop *loop = pdata;
 319     pa_threaded_mainloop_signal(loop, 0);
 320 }
 321
 322 static void wait_for_operation(pa_operation *op, pa_threaded_mainloop *loop)
 323 {
 324     if(op)
 325     {
 326         while(pa_operation_get_state(op) == PA_OPERATION_RUNNING)
 327             pa_threaded_mainloop_wait(loop);
 328         pa_operation_unref(op);
 329     }
 330 }
 331
 332
 333 static pa_context *connect_context(pa_threaded_mainloop *loop, ALboolean silent)
 334 {
 335     const char *name = "OpenAL Soft";
 336     char path_name[PATH_MAX];
 337     pa_context_state_t state;
 338     pa_context *context;
 339     int err;
 340
 341     if(pa_get_binary_name(path_name, sizeof(path_name)))
 342         name = pa_path_get_filename(path_name);
 343
 344     context = pa_context_new(pa_threaded_mainloop_get_api(loop), name);
 345     if(!context)
 346     {
 347         ERR("pa_context_new() failed\n");
 348         return NULL;
 349     }
 350
 351     pa_context_set_state_callback(context, context_state_callback, loop);
 352
 353     if((err=pa_context_connect(context, NULL, pulse_ctx_flags, NULL)) >= 0)
 354     {
 355         while((state=pa_context_get_state(context)) != PA_CONTEXT_READY)
 356         {
 357             if(!PA_CONTEXT_IS_GOOD(state))
 358             {
 359                 err = pa_context_errno(context);
 360                 if(err > 0)  err = -err;
 361                 break;
 362             }
 363
 364             pa_threaded_mainloop_wait(loop);
 365         }
 366     }
 367     pa_context_set_state_callback(context, NULL, NULL);
 368
 369     if(err < 0)
 370     {
 371         if(!silent)
 372             ERR("Context did not connect: %s\n", pa_strerror(err));
 373         pa_context_unref(context);
 374         return NULL;
 375     }
 376
 377     return context;
 378 }
 379
 380
 381 static ALCboolean pulse_open(pa_threaded_mainloop **loop, pa_context **context,
 382                              void(*state_cb)(pa_context*,void*), void *ptr)
 383 {
 384     if(!(*loop = pa_threaded_mainloop_new()))
 385     {
 386         ERR("pa_threaded_mainloop_new() failed!\n");
 387         return ALC_FALSE;
 388     }
 389     if(pa_threaded_mainloop_start(*loop) < 0)
 390     {
 391         ERR("pa_threaded_mainloop_start() failed\n");
 392         goto error;
 393     }
 394
 395     pa_threaded_mainloop_lock(*loop);
 396
 397     *context = connect_context(*loop, AL_FALSE);
 398     if(!*context)
 399     {
 400         pa_threaded_mainloop_unlock(*loop);
 401         pa_threaded_mainloop_stop(*loop);
 402         goto error;
 403     }
 404     pa_context_set_state_callback(*context, state_cb, ptr);
 405
 406     pa_threaded_mainloop_unlock(*loop);
 407     return ALC_TRUE;
 408
 409 error:
 410     pa_threaded_mainloop_free(*loop);
 411     *loop = NULL;
 412
 413     return ALC_FALSE;
 414 }
 415
 416 static void pulse_close(pa_threaded_mainloop *loop, pa_context *context, pa_stream *stream)
 417 {
 418     pa_threaded_mainloop_lock(loop);
 419
 420     if(stream)
 421     {
 422         pa_stream_set_state_callback(stream, NULL, NULL);
 423         pa_stream_set_moved_callback(stream, NULL, NULL);
 424         pa_stream_set_write_callback(stream, NULL, NULL);
 425         pa_stream_set_buffer_attr_callback(stream, NULL, NULL);
 426         pa_stream_disconnect(stream);
 427         pa_stream_unref(stream);
 428     }
 429
 430     pa_context_disconnect(context);
 431     pa_context_unref(context);
 432
 433     pa_threaded_mainloop_unlock(loop);
 434
 435     pa_threaded_mainloop_stop(loop);
 436     pa_threaded_mainloop_free(loop);
 437 }
 438
 439
 440 typedef struct {
 441     al_string name;
 442     al_string device_name;
 443 } DevMap;
 444 TYPEDEF_VECTOR(DevMap, vector_DevMap)
 445
 446 static vector_DevMap PlaybackDevices;
 447 static vector_DevMap CaptureDevices;
 448
 449 static void clear_devlist(vector_DevMap *list)
 450 {
 451 #define DEINIT_STRS(i)  (AL_STRING_DEINIT((i)->name),AL_STRING_DEINIT((i)->device_name))
 452     VECTOR_FOR_EACH(DevMap, *list, DEINIT_STRS);
 453 #undef DEINIT_STRS
 454     VECTOR_RESIZE(*list, 0, 0);
 455 }
 456
 457
 458 typedef struct ALCpulsePlayback {
 459     DERIVE_FROM_TYPE(ALCbackend);
 460
 461     al_string device_name;
 462
 463     pa_buffer_attr attr;
 464     pa_sample_spec spec;
 465
 466     pa_threaded_mainloop *loop;
 467
 468     pa_stream *stream;
 469     pa_context *context;
 470
 471     volatile ALboolean killNow;
 472     althrd_t thread;
 473 } ALCpulsePlayback;
 474
 475 static void ALCpulsePlayback_deviceCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 476 static void ALCpulsePlayback_probeDevices(void);
 477
 478 static void ALCpulsePlayback_bufferAttrCallback(pa_stream *stream, void *pdata);
 479 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata);
 480 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata);
 481 static void ALCpulsePlayback_streamWriteCallback(pa_stream *p, size_t nbytes, void *userdata);
 482 static void ALCpulsePlayback_sinkInfoCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 483 static void ALCpulsePlayback_sinkNameCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 484 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata);
 485 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name, pa_threaded_mainloop *loop,
 486                                                  pa_context *context, pa_stream_flags_t flags,
 487                                                  pa_buffer_attr *attr, pa_sample_spec *spec,
 488                                                  pa_channel_map *chanmap);
 489 static int ALCpulsePlayback_mixerProc(void *ptr);
 490
 491 static void ALCpulsePlayback_Construct(ALCpulsePlayback *self, ALCdevice *device);
 492 static void ALCpulsePlayback_Destruct(ALCpulsePlayback *self);
 493 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name);
 494 static void ALCpulsePlayback_close(ALCpulsePlayback *self);
 495 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self);
 496 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self);
 497 static void ALCpulsePlayback_stop(ALCpulsePlayback *self);
 498 static DECLARE_FORWARD2(ALCpulsePlayback, ALCbackend, ALCenum, captureSamples, ALCvoid*, ALCuint)
 499 static DECLARE_FORWARD(ALCpulsePlayback, ALCbackend, ALCuint, availableSamples)
 500 static ClockLatency ALCpulsePlayback_getClockLatency(ALCpulsePlayback *self);
 501 static void ALCpulsePlayback_lock(ALCpulsePlayback *self);
 502 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self);
 503 DECLARE_DEFAULT_ALLOCATORS(ALCpulsePlayback)
 504
 505 DEFINE_ALCBACKEND_VTABLE(ALCpulsePlayback);
 506
 507
 508 static void ALCpulsePlayback_Construct(ALCpulsePlayback *self, ALCdevice *device)
 509 {
 510     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 511     SET_VTABLE2(ALCpulsePlayback, ALCbackend, self);
 512
 513     AL_STRING_INIT(self->device_name);
 514 }
 515
 516 static void ALCpulsePlayback_Destruct(ALCpulsePlayback *self)
 517 {
 518     AL_STRING_DEINIT(self->device_name);
 519     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
 520 }
 521
 522
 523 static void ALCpulsePlayback_deviceCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 524 {
 525     pa_threaded_mainloop *loop = pdata;
 526     const DevMap *iter;
 527     DevMap entry;
 528     int count;
 529
 530     if(eol)
 531     {
 532         pa_threaded_mainloop_signal(loop, 0);
 533         return;
 534     }
 535
 536 #define MATCH_INFO_NAME(iter) (alstr_cmp_cstr((iter)->device_name, info->name) == 0)
 537     VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_INFO_NAME);
 538     if(iter != VECTOR_END(PlaybackDevices)) return;
 539 #undef MATCH_INFO_NAME
 540
 541     AL_STRING_INIT(entry.name);
 542     AL_STRING_INIT(entry.device_name);
 543
 544     alstr_copy_cstr(&entry.device_name, info->name);
 545
 546     count = 0;
 547     while(1)
 548     {
 549         alstr_copy_cstr(&entry.name, info->description);
 550         if(count != 0)
 551         {
 552             char str[64];
 553             snprintf(str, sizeof(str), " #%d", count+1);
 554             alstr_append_cstr(&entry.name, str);
 555         }
 556
 557 #define MATCH_ENTRY(i) (alstr_cmp(entry.name, (i)->name) == 0)
 558         VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_ENTRY);
 559         if(iter == VECTOR_END(PlaybackDevices)) break;
 560 #undef MATCH_ENTRY
 561         count++;
 562     }
 563
 564     TRACE("Got device \"%s\", \"%s\"\n", alstr_get_cstr(entry.name), alstr_get_cstr(entry.device_name));
 565
 566     VECTOR_PUSH_BACK(PlaybackDevices, entry);
 567 }
 568
 569 static void ALCpulsePlayback_probeDevices(void)
 570 {
 571     pa_threaded_mainloop *loop;
 572
 573     clear_devlist(&PlaybackDevices);
 574
 575     if((loop=pa_threaded_mainloop_new()) &&
 576        pa_threaded_mainloop_start(loop) >= 0)
 577     {
 578         pa_context *context;
 579
 580         pa_threaded_mainloop_lock(loop);
 581         context = connect_context(loop, AL_FALSE);
 582         if(context)
 583         {
 584             pa_operation *o;
 585             pa_stream_flags_t flags;
 586             pa_sample_spec spec;
 587             pa_stream *stream;
 588
 589             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 590                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
 591
 592             spec.format = PA_SAMPLE_S16NE;
 593             spec.rate = 44100;
 594             spec.channels = 2;
 595
 596             stream = ALCpulsePlayback_connectStream(NULL, loop, context, flags,
 597                                                     NULL, &spec, NULL);
 598             if(stream)
 599             {
 600                 o = pa_context_get_sink_info_by_name(context, pa_stream_get_device_name(stream),
 601                                                      ALCpulsePlayback_deviceCallback, loop);
 602                 wait_for_operation(o, loop);
 603
 604                 pa_stream_disconnect(stream);
 605                 pa_stream_unref(stream);
 606                 stream = NULL;
 607             }
 608
 609             o = pa_context_get_sink_info_list(context, ALCpulsePlayback_deviceCallback, loop);
 610             wait_for_operation(o, loop);
 611
 612             pa_context_disconnect(context);
 613             pa_context_unref(context);
 614         }
 615         pa_threaded_mainloop_unlock(loop);
 616         pa_threaded_mainloop_stop(loop);
 617     }
 618     if(loop)
 619         pa_threaded_mainloop_free(loop);
 620 }
 621
 622
 623 static void ALCpulsePlayback_bufferAttrCallback(pa_stream *stream, void *pdata)
 624 {
 625     ALCpulsePlayback *self = pdata;
 626
 627     self->attr = *pa_stream_get_buffer_attr(stream);
 628     TRACE("minreq=%d, tlength=%d, prebuf=%d\n", self->attr.minreq, self->attr.tlength, self->attr.prebuf);
 629     /* FIXME: Update the device's UpdateSize (and/or NumUpdates) using the new
 630      * buffer attributes? Changing UpdateSize will change the ALC_REFRESH
 631      * property, which probably shouldn't change between device resets. But
 632      * leaving it alone means ALC_REFRESH will be off.
 633      */
 634 }
 635
 636 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata)
 637 {
 638     ALCpulsePlayback *self = pdata;
 639     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
 640     {
 641         ERR("Received context failure!\n");
 642         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 643     }
 644     pa_threaded_mainloop_signal(self->loop, 0);
 645 }
 646
 647 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata)
 648 {
 649     ALCpulsePlayback *self = pdata;
 650     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
 651     {
 652         ERR("Received stream failure!\n");
 653         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 654     }
 655     pa_threaded_mainloop_signal(self->loop, 0);
 656 }
 657
 658 static void ALCpulsePlayback_streamWriteCallback(pa_stream* UNUSED(p), size_t UNUSED(nbytes), void *pdata)
 659 {
 660     ALCpulsePlayback *self = pdata;
 661     pa_threaded_mainloop_signal(self->loop, 0);
 662 }
 663
 664 static void ALCpulsePlayback_sinkInfoCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 665 {
 666     static const struct {
 667         enum DevFmtChannels chans;
 668         pa_channel_map map;
 669     } chanmaps[] = {
 670         { DevFmtX71, { 8, {
 671             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 672             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 673             PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
 674             PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
 675         } } },
 676         { DevFmtX61, { 7, {
 677             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 678             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 679             PA_CHANNEL_POSITION_REAR_CENTER,
 680             PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
 681         } } },
 682         { DevFmtX51, { 6, {
 683             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 684             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 685             PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
 686         } } },
 687         { DevFmtX51Rear, { 6, {
 688             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 689             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 690             PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT
 691         } } },
 692         { DevFmtQuad, { 4, {
 693             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 694             PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT
 695         } } },
 696         { DevFmtStereo, { 2, {
 697             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT
 698         } } },
 699         { DevFmtMono, { 1, {PA_CHANNEL_POSITION_MONO} } }
 700     };
 701     ALCpulsePlayback *self = pdata;
 702     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 703     size_t i;
 704
 705     if(eol)
 706     {
 707         pa_threaded_mainloop_signal(self->loop, 0);
 708         return;
 709     }
 710
 711     for(i = 0;i < COUNTOF(chanmaps);i++)
 712     {
 713         if(pa_channel_map_superset(&info->channel_map, &chanmaps[i].map))
 714         {
 715             if(!(device->Flags&DEVICE_CHANNELS_REQUEST))
 716                 device->FmtChans = chanmaps[i].chans;
 717             break;
 718         }
 719     }
 720     if(i == COUNTOF(chanmaps))
 721     {
 722         char chanmap_str[PA_CHANNEL_MAP_SNPRINT_MAX] = "";
 723         pa_channel_map_snprint(chanmap_str, sizeof(chanmap_str), &info->channel_map);
 724         WARN("Failed to find format for channel map:\n    %s\n", chanmap_str);
 725     }
 726
 727     if(info->active_port)
 728         TRACE("Active port: %s (%s)\n", info->active_port->name, info->active_port->description);
 729     device->IsHeadphones = (info->active_port &&
 730                             strcmp(info->active_port->name, "analog-output-headphones") == 0 &&
 731                             device->FmtChans == DevFmtStereo);
 732 }
 733
 734 static void ALCpulsePlayback_sinkNameCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 735 {
 736     ALCpulsePlayback *self = pdata;
 737     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 738
 739     if(eol)
 740     {
 741         pa_threaded_mainloop_signal(self->loop, 0);
 742         return;
 743     }
 744
 745     alstr_copy_cstr(&device->DeviceName, info->description);
 746 }
 747
 748
 749 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata)
 750 {
 751     ALCpulsePlayback *self = pdata;
 752
 753     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
 754
 755     TRACE("Stream moved to %s\n", alstr_get_cstr(self->device_name));
 756 }
 757
 758
 759 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name,
 760     pa_threaded_mainloop *loop, pa_context *context,
 761     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
 762     pa_channel_map *chanmap)
 763 {
 764     pa_stream_state_t state;
 765     pa_stream *stream;
 766
 767     if(!device_name)
 768     {
 769         device_name = getenv("ALSOFT_PULSE_DEFAULT");
 770         if(device_name && !device_name[0])
 771             device_name = NULL;
 772     }
 773
 774     stream = pa_stream_new_with_proplist(context, "Playback Stream", spec, chanmap, prop_filter);
 775     if(!stream)
 776     {
 777         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
 778         return NULL;
 779     }
 780
 781     pa_stream_set_state_callback(stream, stream_state_callback, loop);
 782
 783     if(pa_stream_connect_playback(stream, device_name, attr, flags, NULL, NULL) < 0)
 784     {
 785         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
 786         pa_stream_unref(stream);
 787         return NULL;
 788     }
 789
 790     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
 791     {
 792         if(!PA_STREAM_IS_GOOD(state))
 793         {
 794             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
 795             pa_stream_unref(stream);
 796             return NULL;
 797         }
 798
 799         pa_threaded_mainloop_wait(loop);
 800     }
 801     pa_stream_set_state_callback(stream, NULL, NULL);
 802
 803     return stream;
 804 }
 805
 806
 807 static int ALCpulsePlayback_mixerProc(void *ptr)
 808 {
 809     ALCpulsePlayback *self = ptr;
 810     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 811     ALuint buffer_size;
 812     size_t frame_size;
 813     ssize_t len;
 814
 815     SetRTPriority();
 816     althrd_setname(althrd_current(), MIXER_THREAD_NAME);
 817
 818     pa_threaded_mainloop_lock(self->loop);
 819     frame_size = pa_frame_size(&self->spec);
 820
 821     while(!self->killNow && device->Connected)
 822     {
 823         len = pa_stream_writable_size(self->stream);
 824         if(len < 0)
 825         {
 826             ERR("Failed to get writable size: %ld", (long)len);
 827             aluHandleDisconnect(device);
 828             break;
 829         }
 830
 831         /* Make sure we're going to write at least 2 'periods' (minreqs), in
 832          * case the server increased it since starting playback. Also round up
 833          * the number of writable periods if it's not an integer count.
 834          */
 835         buffer_size = maxu((self->attr.tlength + self->attr.minreq/2) / self->attr.minreq, 2) *
 836                       self->attr.minreq;
 837
 838         /* NOTE: This assumes pa_stream_writable_size returns between 0 and
 839          * tlength, else there will be more latency than intended.
 840          */
 841         len = mini(len - (ssize_t)self->attr.tlength, 0) + buffer_size;
 842         if(len < (int32_t)self->attr.minreq)
 843         {
 844             if(pa_stream_is_corked(self->stream))
 845             {
 846                 pa_operation *o;
 847                 o = pa_stream_cork(self->stream, 0, NULL, NULL);
 848                 if(o) pa_operation_unref(o);
 849             }
 850             pa_threaded_mainloop_wait(self->loop);
 851             continue;
 852         }
 853         len -= len%self->attr.minreq;
 854
 855         while(len > 0)
 856         {
 857             size_t newlen = len;
 858             int ret;
 859             void *buf;
 860             pa_free_cb_t free_func = NULL;
 861
 862             if(pa_stream_begin_write(self->stream, &buf, &newlen) < 0)
 863             {
 864                 buf = pa_xmalloc(newlen);
 865                 free_func = pa_xfree;
 866             }
 867
 868             aluMixData(device, buf, newlen/frame_size);
 869
 870             ret = pa_stream_write(self->stream, buf, newlen, free_func, 0, PA_SEEK_RELATIVE);
 871             if(ret != PA_OK)
 872             {
 873                 ERR("Failed to write to stream: %d, %s\n", ret, pa_strerror(ret));
 874                 break;
 875             }
 876             len -= newlen;
 877         }
 878     }
 879     pa_threaded_mainloop_unlock(self->loop);
 880
 881     return 0;
 882 }
 883
 884
 885 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name)
 886 {
 887     const_al_string dev_name = AL_STRING_INIT_STATIC();
 888     const char *pulse_name = NULL;
 889     pa_stream_flags_t flags;
 890     pa_sample_spec spec;
 891
 892     if(name)
 893     {
 894         const DevMap *iter;
 895
 896         if(VECTOR_SIZE(PlaybackDevices) == 0)
 897             ALCpulsePlayback_probeDevices();
 898
 899 #define MATCH_NAME(iter) (alstr_cmp_cstr((iter)->name, name) == 0)
 900         VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_NAME);
 901 #undef MATCH_NAME
 902         if(iter == VECTOR_END(PlaybackDevices))
 903             return ALC_INVALID_VALUE;
 904         pulse_name = alstr_get_cstr(iter->device_name);
 905         dev_name = iter->name;
 906     }
 907
 908     if(!pulse_open(&self->loop, &self->context, ALCpulsePlayback_contextStateCallback, self))
 909         return ALC_INVALID_VALUE;
 910
 911     pa_threaded_mainloop_lock(self->loop);
 912
 913     flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 914             PA_STREAM_FIX_CHANNELS;
 915     if(!GetConfigValueBool(NULL, "pulse", "allow-moves", 0))
 916         flags |= PA_STREAM_DONT_MOVE;
 917
 918     spec.format = PA_SAMPLE_S16NE;
 919     spec.rate = 44100;
 920     spec.channels = 2;
 921
 922     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
 923     self->stream = ALCpulsePlayback_connectStream(pulse_name, self->loop, self->context,
 924                                                   flags, NULL, &spec, NULL);
 925     if(!self->stream)
 926     {
 927         pa_threaded_mainloop_unlock(self->loop);
 928         pulse_close(self->loop, self->context, self->stream);
 929         self->loop = NULL;
 930         self->context = NULL;
 931         return ALC_INVALID_VALUE;
 932     }
 933     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
 934
 935     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
 936     if(alstr_empty(dev_name))
 937     {
 938         pa_operation *o = pa_context_get_sink_info_by_name(
 939             self->context, alstr_get_cstr(self->device_name),
 940             ALCpulsePlayback_sinkNameCallback, self
 941         );
 942         wait_for_operation(o, self->loop);
 943     }
 944     else
 945     {
 946         ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 947         alstr_copy(&device->DeviceName, dev_name);
 948     }
 949
 950     pa_threaded_mainloop_unlock(self->loop);
 951
 952     return ALC_NO_ERROR;
 953 }
 954
 955 static void ALCpulsePlayback_close(ALCpulsePlayback *self)
 956 {
 957     pulse_close(self->loop, self->context, self->stream);
 958     self->loop = NULL;
 959     self->context = NULL;
 960     self->stream = NULL;
 961
 962     alstr_clear(&self->device_name);
 963 }
 964
 965 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self)
 966 {
 967     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 968     pa_stream_flags_t flags = 0;
 969     const char *mapname = NULL;
 970     pa_channel_map chanmap;
 971     pa_operation *o;
 972
 973     pa_threaded_mainloop_lock(self->loop);
 974
 975     if(self->stream)
 976     {
 977         pa_stream_set_state_callback(self->stream, NULL, NULL);
 978         pa_stream_set_moved_callback(self->stream, NULL, NULL);
 979         pa_stream_set_write_callback(self->stream, NULL, NULL);
 980         pa_stream_set_buffer_attr_callback(self->stream, NULL, NULL);
 981         pa_stream_disconnect(self->stream);
 982         pa_stream_unref(self->stream);
 983         self->stream = NULL;
 984     }
 985
 986     o = pa_context_get_sink_info_by_name(self->context, alstr_get_cstr(self->device_name),
 987                                          ALCpulsePlayback_sinkInfoCallback, self);
 988     wait_for_operation(o, self->loop);
 989
 990     if(GetConfigValueBool(alstr_get_cstr(device->DeviceName), "pulse", "fix-rate", 0) ||
 991        !(device->Flags&DEVICE_FREQUENCY_REQUEST))
 992         flags |= PA_STREAM_FIX_RATE;
 993     flags |= PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
 994     flags |= PA_STREAM_ADJUST_LATENCY;
 995     flags |= PA_STREAM_START_CORKED;
 996     if(!GetConfigValueBool(NULL, "pulse", "allow-moves", 0))
 997         flags |= PA_STREAM_DONT_MOVE;
 998
 999     switch(device->FmtType)
1000     {
1001         case DevFmtByte:
1002             device->FmtType = DevFmtUByte;
1003             /* fall-through */
1004         case DevFmtUByte:
1005             self->spec.format = PA_SAMPLE_U8;
1006             break;
1007         case DevFmtUShort:
1008             device->FmtType = DevFmtShort;
1009             /* fall-through */
1010         case DevFmtShort:
1011             self->spec.format = PA_SAMPLE_S16NE;
1012             break;
1013         case DevFmtUInt:
1014             device->FmtType = DevFmtInt;
1015             /* fall-through */
1016         case DevFmtInt:
1017             self->spec.format = PA_SAMPLE_S32NE;
1018             break;
1019         case DevFmtFloat:
1020             self->spec.format = PA_SAMPLE_FLOAT32NE;
1021             break;
1022     }
1023     self->spec.rate = device->Frequency;
1024     self->spec.channels = ChannelsFromDevFmt(device->FmtChans, device->AmbiOrder);
1025
1026     if(pa_sample_spec_valid(&self->spec) == 0)
1027     {
1028         ERR("Invalid sample format\n");
1029         pa_threaded_mainloop_unlock(self->loop);
1030         return ALC_FALSE;
1031     }
1032
1033     switch(device->FmtChans)
1034     {
1035         case DevFmtMono:
1036             mapname = "mono";
1037             break;
1038         case DevFmtAmbi3D:
1039             device->FmtChans = DevFmtStereo;
1040             /*fall-through*/
1041         case DevFmtStereo:
1042             mapname = "front-left,front-right";
1043             break;
1044         case DevFmtQuad:
1045             mapname = "front-left,front-right,rear-left,rear-right";
1046             break;
1047         case DevFmtX51:
1048             mapname = "front-left,front-right,front-center,lfe,side-left,side-right";
1049             break;
1050         case DevFmtX51Rear:
1051             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right";
1052             break;
1053         case DevFmtX61:
1054             mapname = "front-left,front-right,front-center,lfe,rear-center,side-left,side-right";
1055             break;
1056         case DevFmtX71:
1057             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right";
1058             break;
1059     }
1060     if(!pa_channel_map_parse(&chanmap, mapname))
1061     {
1062         ERR("Failed to build channel map for %s\n", DevFmtChannelsString(device->FmtChans));
1063         pa_threaded_mainloop_unlock(self->loop);
1064         return ALC_FALSE;
1065     }
1066     SetDefaultWFXChannelOrder(device);
1067
1068     self->attr.fragsize = -1;
1069     self->attr.prebuf = 0;
1070     self->attr.minreq = device->UpdateSize * pa_frame_size(&self->spec);
1071     self->attr.tlength = self->attr.minreq * maxu(device->NumUpdates, 2);
1072     self->attr.maxlength = -1;
1073
1074     self->stream = ALCpulsePlayback_connectStream(alstr_get_cstr(self->device_name),
1075         self->loop, self->context, flags, &self->attr, &self->spec, &chanmap
1076     );
1077     if(!self->stream)
1078     {
1079         pa_threaded_mainloop_unlock(self->loop);
1080         return ALC_FALSE;
1081     }
1082     pa_stream_set_state_callback(self->stream, ALCpulsePlayback_streamStateCallback, self);
1083     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
1084     pa_stream_set_write_callback(self->stream, ALCpulsePlayback_streamWriteCallback, self);
1085
1086     self->spec = *(pa_stream_get_sample_spec(self->stream));
1087     if(device->Frequency != self->spec.rate)
1088     {
1089         /* Server updated our playback rate, so modify the buffer attribs
1090          * accordingly. */
1091         device->NumUpdates = (ALuint)clampd(
1092             (ALdouble)device->NumUpdates/device->Frequency*self->spec.rate + 0.5, 2.0, 16.0
1093         );
1094
1095         self->attr.minreq  = device->UpdateSize * pa_frame_size(&self->spec);
1096         self->attr.tlength = self->attr.minreq * device->NumUpdates;
1097         self->attr.maxlength = -1;
1098         self->attr.prebuf  = 0;
1099
1100         o = pa_stream_set_buffer_attr(self->stream, &self->attr,
1101                                       stream_success_callback, self->loop);
1102         wait_for_operation(o, self->loop);
1103
1104         device->Frequency = self->spec.rate;
1105     }
1106
1107     pa_stream_set_buffer_attr_callback(self->stream, ALCpulsePlayback_bufferAttrCallback, self);
1108     ALCpulsePlayback_bufferAttrCallback(self->stream, self);
1109
1110     device->NumUpdates = (ALuint)clampu64(
1111         (self->attr.tlength + self->attr.minreq/2) / self->attr.minreq, 2, 16
1112     );
1113     device->UpdateSize = self->attr.minreq / pa_frame_size(&self->spec);
1114
1115     /* HACK: prebuf should be 0 as that's what we set it to. However on some
1116      * systems it comes back as non-0, so we have to make sure the device will
1117      * write enough audio to start playback. The lack of manual start control
1118      * may have unintended consequences, but it's better than not starting at
1119      * all.
1120      */
1121     if(self->attr.prebuf != 0)
1122     {
1123         ALuint len = self->attr.prebuf / pa_frame_size(&self->spec);
1124         if(len <= device->UpdateSize*device->NumUpdates)
1125             ERR("Non-0 prebuf, %u samples (%u bytes), device has %u samples\n",
1126                 len, self->attr.prebuf, device->UpdateSize*device->NumUpdates);
1127         else
1128         {
1129             ERR("Large prebuf, %u samples (%u bytes), increasing device from %u samples",
1130                 len, self->attr.prebuf, device->UpdateSize*device->NumUpdates);
1131             device->NumUpdates = (len+device->UpdateSize-1) / device->UpdateSize;
1132         }
1133     }
1134
1135     pa_threaded_mainloop_unlock(self->loop);
1136     return ALC_TRUE;
1137 }
1138
1139 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self)
1140 {
1141     self->killNow = AL_FALSE;
1142     if(althrd_create(&self->thread, ALCpulsePlayback_mixerProc, self) != althrd_success)
1143         return ALC_FALSE;
1144     return ALC_TRUE;
1145 }
1146
1147 static void ALCpulsePlayback_stop(ALCpulsePlayback *self)
1148 {
1149     pa_operation *o;
1150     int res;
1151
1152     if(!self->stream || self->killNow)
1153         return;
1154
1155     self->killNow = AL_TRUE;
1156     /* Signal the main loop in case PulseAudio isn't sending us audio requests
1157      * (e.g. if the device is suspended). We need to lock the mainloop in case
1158      * the mixer is between checking the killNow flag but before waiting for
1159      * the signal.
1160      */
1161     pa_threaded_mainloop_lock(self->loop);
1162     pa_threaded_mainloop_unlock(self->loop);
1163     pa_threaded_mainloop_signal(self->loop, 0);
1164     althrd_join(self->thread, &res);
1165
1166     pa_threaded_mainloop_lock(self->loop);
1167
1168     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1169     wait_for_operation(o, self->loop);
1170
1171     pa_threaded_mainloop_unlock(self->loop);
1172 }
1173
1174
1175 static ClockLatency ALCpulsePlayback_getClockLatency(ALCpulsePlayback *self)
1176 {
1177     pa_usec_t latency = 0;
1178     ClockLatency ret;
1179     int neg, err;
1180
1181     pa_threaded_mainloop_lock(self->loop);
1182     ret.ClockTime = GetDeviceClockTime(STATIC_CAST(ALCbackend,self)->mDevice);
1183     if((err=pa_stream_get_latency(self->stream, &latency, &neg)) != 0)
1184     {
1185         /* FIXME: if err = -PA_ERR_NODATA, it means we were called too soon
1186          * after starting the stream and no timing info has been received from
1187          * the server yet. Should we wait, possibly stalling the app, or give a
1188          * dummy value? Either way, it shouldn't be 0. */
1189         if(err != -PA_ERR_NODATA)
1190             ERR("Failed to get stream latency: 0x%x\n", err);
1191         latency = 0;
1192         neg = 0;
1193     }
1194     if(neg) latency = 0;
1195     ret.Latency = minu64(latency, U64(0xffffffffffffffff)/1000) * 1000;
1196     pa_threaded_mainloop_unlock(self->loop);
1197
1198     return ret;
1199 }
1200
1201
1202 static void ALCpulsePlayback_lock(ALCpulsePlayback *self)
1203 {
1204     pa_threaded_mainloop_lock(self->loop);
1205 }
1206
1207 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self)
1208 {
1209     pa_threaded_mainloop_unlock(self->loop);
1210 }
1211
1212
1213 typedef struct ALCpulseCapture {
1214     DERIVE_FROM_TYPE(ALCbackend);
1215
1216     al_string device_name;
1217
1218     const void *cap_store;
1219     size_t cap_len;
1220     size_t cap_remain;
1221
1222     ALCuint last_readable;
1223
1224     pa_buffer_attr attr;
1225     pa_sample_spec spec;
1226
1227     pa_threaded_mainloop *loop;
1228
1229     pa_stream *stream;
1230     pa_context *context;
1231 } ALCpulseCapture;
1232
1233 static void ALCpulseCapture_deviceCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1234 static void ALCpulseCapture_probeDevices(void);
1235
1236 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata);
1237 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata);
1238 static void ALCpulseCapture_sourceNameCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1239 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata);
1240 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1241                                                 pa_threaded_mainloop *loop, pa_context *context,
1242                                                 pa_stream_flags_t flags, pa_buffer_attr *attr,
1243                                                 pa_sample_spec *spec, pa_channel_map *chanmap);
1244
1245 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device);
1246 static void ALCpulseCapture_Destruct(ALCpulseCapture *self);
1247 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name);
1248 static void ALCpulseCapture_close(ALCpulseCapture *self);
1249 static DECLARE_FORWARD(ALCpulseCapture, ALCbackend, ALCboolean, reset)
1250 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self);
1251 static void ALCpulseCapture_stop(ALCpulseCapture *self);
1252 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples);
1253 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self);
1254 static ClockLatency ALCpulseCapture_getClockLatency(ALCpulseCapture *self);
1255 static void ALCpulseCapture_lock(ALCpulseCapture *self);
1256 static void ALCpulseCapture_unlock(ALCpulseCapture *self);
1257 DECLARE_DEFAULT_ALLOCATORS(ALCpulseCapture)
1258
1259 DEFINE_ALCBACKEND_VTABLE(ALCpulseCapture);
1260
1261
1262 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device)
1263 {
1264     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
1265     SET_VTABLE2(ALCpulseCapture, ALCbackend, self);
1266
1267     AL_STRING_INIT(self->device_name);
1268 }
1269
1270 static void ALCpulseCapture_Destruct(ALCpulseCapture *self)
1271 {
1272     AL_STRING_DEINIT(self->device_name);
1273     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
1274 }
1275
1276
1277 static void ALCpulseCapture_deviceCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1278 {
1279     pa_threaded_mainloop *loop = pdata;
1280     const DevMap *iter;
1281     DevMap entry;
1282     int count;
1283
1284     if(eol)
1285     {
1286         pa_threaded_mainloop_signal(loop, 0);
1287         return;
1288     }
1289
1290 #define MATCH_INFO_NAME(iter) (alstr_cmp_cstr((iter)->device_name, info->name) == 0)
1291     VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_INFO_NAME);
1292     if(iter != VECTOR_END(CaptureDevices)) return;
1293 #undef MATCH_INFO_NAME
1294
1295     AL_STRING_INIT(entry.name);
1296     AL_STRING_INIT(entry.device_name);
1297
1298     alstr_copy_cstr(&entry.device_name, info->name);
1299
1300     count = 0;
1301     while(1)
1302     {
1303         alstr_copy_cstr(&entry.name, info->description);
1304         if(count != 0)
1305         {
1306             char str[64];
1307             snprintf(str, sizeof(str), " #%d", count+1);
1308             alstr_append_cstr(&entry.name, str);
1309         }
1310
1311 #define MATCH_ENTRY(i) (alstr_cmp(entry.name, (i)->name) == 0)
1312         VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_ENTRY);
1313         if(iter == VECTOR_END(CaptureDevices)) break;
1314 #undef MATCH_ENTRY
1315         count++;
1316     }
1317
1318     TRACE("Got device \"%s\", \"%s\"\n", alstr_get_cstr(entry.name), alstr_get_cstr(entry.device_name));
1319
1320     VECTOR_PUSH_BACK(CaptureDevices, entry);
1321 }
1322
1323 static void ALCpulseCapture_probeDevices(void)
1324 {
1325     pa_threaded_mainloop *loop;
1326
1327     clear_devlist(&CaptureDevices);
1328
1329     if((loop=pa_threaded_mainloop_new()) &&
1330        pa_threaded_mainloop_start(loop) >= 0)
1331     {
1332         pa_context *context;
1333
1334         pa_threaded_mainloop_lock(loop);
1335         context = connect_context(loop, AL_FALSE);
1336         if(context)
1337         {
1338             pa_operation *o;
1339             pa_stream_flags_t flags;
1340             pa_sample_spec spec;
1341             pa_stream *stream;
1342
1343             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
1344                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
1345
1346             spec.format = PA_SAMPLE_S16NE;
1347             spec.rate = 44100;
1348             spec.channels = 1;
1349
1350             stream = ALCpulseCapture_connectStream(NULL, loop, context, flags,
1351                                                    NULL, &spec, NULL);
1352             if(stream)
1353             {
1354                 o = pa_context_get_source_info_by_name(context, pa_stream_get_device_name(stream),
1355                                                        ALCpulseCapture_deviceCallback, loop);
1356                 wait_for_operation(o, loop);
1357
1358                 pa_stream_disconnect(stream);
1359                 pa_stream_unref(stream);
1360                 stream = NULL;
1361             }
1362
1363             o = pa_context_get_source_info_list(context, ALCpulseCapture_deviceCallback, loop);
1364             wait_for_operation(o, loop);
1365
1366             pa_context_disconnect(context);
1367             pa_context_unref(context);
1368         }
1369         pa_threaded_mainloop_unlock(loop);
1370         pa_threaded_mainloop_stop(loop);
1371     }
1372     if(loop)
1373         pa_threaded_mainloop_free(loop);
1374 }
1375
1376
1377 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata)
1378 {
1379     ALCpulseCapture *self = pdata;
1380     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
1381     {
1382         ERR("Received context failure!\n");
1383         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1384     }
1385     pa_threaded_mainloop_signal(self->loop, 0);
1386 }
1387
1388 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata)
1389 {
1390     ALCpulseCapture *self = pdata;
1391     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
1392     {
1393         ERR("Received stream failure!\n");
1394         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1395     }
1396     pa_threaded_mainloop_signal(self->loop, 0);
1397 }
1398
1399
1400 static void ALCpulseCapture_sourceNameCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1401 {
1402     ALCpulseCapture *self = pdata;
1403     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1404
1405     if(eol)
1406     {
1407         pa_threaded_mainloop_signal(self->loop, 0);
1408         return;
1409     }
1410
1411     alstr_copy_cstr(&device->DeviceName, info->description);
1412 }
1413
1414
1415 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata)
1416 {
1417     ALCpulseCapture *self = pdata;
1418
1419     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
1420
1421     TRACE("Stream moved to %s\n", alstr_get_cstr(self->device_name));
1422 }
1423
1424
1425 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1426     pa_threaded_mainloop *loop, pa_context *context,
1427     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
1428     pa_channel_map *chanmap)
1429 {
1430     pa_stream_state_t state;
1431     pa_stream *stream;
1432
1433     stream = pa_stream_new_with_proplist(context, "Capture Stream", spec, chanmap, prop_filter);
1434     if(!stream)
1435     {
1436         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
1437         return NULL;
1438     }
1439
1440     pa_stream_set_state_callback(stream, stream_state_callback, loop);
1441
1442     if(pa_stream_connect_record(stream, device_name, attr, flags) < 0)
1443     {
1444         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
1445         pa_stream_unref(stream);
1446         return NULL;
1447     }
1448
1449     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
1450     {
1451         if(!PA_STREAM_IS_GOOD(state))
1452         {
1453             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
1454             pa_stream_unref(stream);
1455             return NULL;
1456         }
1457
1458         pa_threaded_mainloop_wait(loop);
1459     }
1460     pa_stream_set_state_callback(stream, NULL, NULL);
1461
1462     return stream;
1463 }
1464
1465
1466 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name)
1467 {
1468     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1469     const char *pulse_name = NULL;
1470     pa_stream_flags_t flags = 0;
1471     const char *mapname = NULL;
1472     pa_channel_map chanmap;
1473     ALuint samples;
1474
1475     if(name)
1476     {
1477         const DevMap *iter;
1478
1479         if(VECTOR_SIZE(CaptureDevices) == 0)
1480             ALCpulseCapture_probeDevices();
1481
1482 #define MATCH_NAME(iter) (alstr_cmp_cstr((iter)->name, name) == 0)
1483         VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_NAME);
1484 #undef MATCH_NAME
1485         if(iter == VECTOR_END(CaptureDevices))
1486             return ALC_INVALID_VALUE;
1487         pulse_name = alstr_get_cstr(iter->device_name);
1488         alstr_copy(&device->DeviceName, iter->name);
1489     }
1490
1491     if(!pulse_open(&self->loop, &self->context, ALCpulseCapture_contextStateCallback, self))
1492         return ALC_INVALID_VALUE;
1493
1494     pa_threaded_mainloop_lock(self->loop);
1495
1496     switch(device->FmtType)
1497     {
1498         case DevFmtUByte:
1499             self->spec.format = PA_SAMPLE_U8;
1500             break;
1501         case DevFmtShort:
1502             self->spec.format = PA_SAMPLE_S16NE;
1503             break;
1504         case DevFmtInt:
1505             self->spec.format = PA_SAMPLE_S32NE;
1506             break;
1507         case DevFmtFloat:
1508             self->spec.format = PA_SAMPLE_FLOAT32NE;
1509             break;
1510         case DevFmtByte:
1511         case DevFmtUShort:
1512         case DevFmtUInt:
1513             ERR("%s capture samples not supported\n", DevFmtTypeString(device->FmtType));
1514             pa_threaded_mainloop_unlock(self->loop);
1515             goto fail;
1516     }
1517
1518     switch(device->FmtChans)
1519     {
1520         case DevFmtMono:
1521             mapname = "mono";
1522             break;
1523         case DevFmtStereo:
1524             mapname = "front-left,front-right";
1525             break;
1526         case DevFmtQuad:
1527             mapname = "front-left,front-right,rear-left,rear-right";
1528             break;
1529         case DevFmtX51:
1530             mapname = "front-left,front-right,front-center,lfe,side-left,side-right";
1531             break;
1532         case DevFmtX51Rear:
1533             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right";
1534             break;
1535         case DevFmtX61:
1536             mapname = "front-left,front-right,front-center,lfe,rear-center,side-left,side-right";
1537             break;
1538         case DevFmtX71:
1539             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right";
1540             break;
1541         case DevFmtAmbi3D:
1542             ERR("%s capture samples not supported\n", DevFmtChannelsString(device->FmtChans));
1543             pa_threaded_mainloop_unlock(self->loop);
1544             goto fail;
1545     }
1546     if(!pa_channel_map_parse(&chanmap, mapname))
1547     {
1548         ERR("Failed to build channel map for %s\n", DevFmtChannelsString(device->FmtChans));
1549         pa_threaded_mainloop_unlock(self->loop);
1550         return ALC_FALSE;
1551     }
1552
1553     self->spec.rate = device->Frequency;
1554     self->spec.channels = ChannelsFromDevFmt(device->FmtChans, device->AmbiOrder);
1555
1556     if(pa_sample_spec_valid(&self->spec) == 0)
1557     {
1558         ERR("Invalid sample format\n");
1559         pa_threaded_mainloop_unlock(self->loop);
1560         goto fail;
1561     }
1562
1563     if(!pa_channel_map_init_auto(&chanmap, self->spec.channels, PA_CHANNEL_MAP_WAVEEX))
1564     {
1565         ERR("Couldn't build map for channel count (%d)!\n", self->spec.channels);
1566         pa_threaded_mainloop_unlock(self->loop);
1567         goto fail;
1568     }
1569
1570     samples = device->UpdateSize * device->NumUpdates;
1571     samples = maxu(samples, 100 * device->Frequency / 1000);
1572
1573     self->attr.minreq = -1;
1574     self->attr.prebuf = -1;
1575     self->attr.maxlength = samples * pa_frame_size(&self->spec);
1576     self->attr.tlength = -1;
1577     self->attr.fragsize = minu(samples, 50*device->Frequency/1000) *
1578                           pa_frame_size(&self->spec);
1579
1580     flags |= PA_STREAM_START_CORKED|PA_STREAM_ADJUST_LATENCY;
1581     if(!GetConfigValueBool(NULL, "pulse", "allow-moves", 0))
1582         flags |= PA_STREAM_DONT_MOVE;
1583
1584     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
1585     self->stream = ALCpulseCapture_connectStream(pulse_name,
1586         self->loop, self->context, flags, &self->attr, &self->spec, &chanmap
1587     );
1588     if(!self->stream)
1589     {
1590         pa_threaded_mainloop_unlock(self->loop);
1591         goto fail;
1592     }
1593     pa_stream_set_moved_callback(self->stream, ALCpulseCapture_streamMovedCallback, self);
1594     pa_stream_set_state_callback(self->stream, ALCpulseCapture_streamStateCallback, self);
1595
1596     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
1597     if(alstr_empty(device->DeviceName))
1598     {
1599         pa_operation *o = pa_context_get_source_info_by_name(
1600             self->context, alstr_get_cstr(self->device_name),
1601             ALCpulseCapture_sourceNameCallback, self
1602         );
1603         wait_for_operation(o, self->loop);
1604     }
1605
1606     pa_threaded_mainloop_unlock(self->loop);
1607     return ALC_NO_ERROR;
1608
1609 fail:
1610     pulse_close(self->loop, self->context, self->stream);
1611     self->loop = NULL;
1612     self->context = NULL;
1613     self->stream = NULL;
1614
1615     return ALC_INVALID_VALUE;
1616 }
1617
1618 static void ALCpulseCapture_close(ALCpulseCapture *self)
1619 {
1620     pulse_close(self->loop, self->context, self->stream);
1621     self->loop = NULL;
1622     self->context = NULL;
1623     self->stream = NULL;
1624
1625     alstr_clear(&self->device_name);
1626 }
1627
1628 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self)
1629 {
1630     pa_operation *o;
1631     pa_threaded_mainloop_lock(self->loop);
1632     o = pa_stream_cork(self->stream, 0, stream_success_callback, self->loop);
1633     wait_for_operation(o, self->loop);
1634     pa_threaded_mainloop_unlock(self->loop);
1635     return ALC_TRUE;
1636 }
1637
1638 static void ALCpulseCapture_stop(ALCpulseCapture *self)
1639 {
1640     pa_operation *o;
1641     pa_threaded_mainloop_lock(self->loop);
1642     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1643     wait_for_operation(o, self->loop);
1644     pa_threaded_mainloop_unlock(self->loop);
1645 }
1646
1647 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples)
1648 {
1649     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1650     ALCuint todo = samples * pa_frame_size(&self->spec);
1651
1652     /* Capture is done in fragment-sized chunks, so we loop until we get all
1653      * that's available */
1654     self->last_readable -= todo;
1655     pa_threaded_mainloop_lock(self->loop);
1656     while(todo > 0)
1657     {
1658         size_t rem = todo;
1659
1660         if(self->cap_len == 0)
1661         {
1662             pa_stream_state_t state;
1663
1664             state = pa_stream_get_state(self->stream);
1665             if(!PA_STREAM_IS_GOOD(state))
1666             {
1667                 aluHandleDisconnect(device);
1668                 break;
1669             }
1670             if(pa_stream_peek(self->stream, &self->cap_store, &self->cap_len) < 0)
1671             {
1672                 ERR("pa_stream_peek() failed: %s\n",
1673                     pa_strerror(pa_context_errno(self->context)));
1674                 aluHandleDisconnect(device);
1675                 break;
1676             }
1677             self->cap_remain = self->cap_len;
1678         }
1679         if(rem > self->cap_remain)
1680             rem = self->cap_remain;
1681
1682         memcpy(buffer, self->cap_store, rem);
1683
1684         buffer = (ALbyte*)buffer + rem;
1685         todo -= rem;
1686
1687         self->cap_store = (ALbyte*)self->cap_store + rem;
1688         self->cap_remain -= rem;
1689         if(self->cap_remain == 0)
1690         {
1691             pa_stream_drop(self->stream);
1692             self->cap_len = 0;
1693         }
1694     }
1695     pa_threaded_mainloop_unlock(self->loop);
1696     if(todo > 0)
1697         memset(buffer, ((device->FmtType==DevFmtUByte) ? 0x80 : 0), todo);
1698
1699     return ALC_NO_ERROR;
1700 }
1701
1702 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self)
1703 {
1704     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1705     size_t readable = self->cap_remain;
1706
1707     if(device->Connected)
1708     {
1709         ssize_t got;
1710         pa_threaded_mainloop_lock(self->loop);
1711         got = pa_stream_readable_size(self->stream);
1712         if(got < 0)
1713         {
1714             ERR("pa_stream_readable_size() failed: %s\n", pa_strerror(got));
1715             aluHandleDisconnect(device);
1716         }
1717         else if((size_t)got > self->cap_len)
1718             readable += got - self->cap_len;
1719         pa_threaded_mainloop_unlock(self->loop);
1720     }
1721
1722     if(self->last_readable < readable)
1723         self->last_readable = readable;
1724     return self->last_readable / pa_frame_size(&self->spec);
1725 }
1726
1727
1728 static ClockLatency ALCpulseCapture_getClockLatency(ALCpulseCapture *self)
1729 {
1730     pa_usec_t latency = 0;
1731     ClockLatency ret;
1732     int neg, err;
1733
1734     pa_threaded_mainloop_lock(self->loop);
1735     ret.ClockTime = GetDeviceClockTime(STATIC_CAST(ALCbackend,self)->mDevice);
1736     if((err=pa_stream_get_latency(self->stream, &latency, &neg)) != 0)
1737     {
1738         ERR("Failed to get stream latency: 0x%x\n", err);
1739         latency = 0;
1740         neg = 0;
1741     }
1742     if(neg) latency = 0;
1743     ret.Latency = minu64(latency, U64(0xffffffffffffffff)/1000) * 1000;
1744     pa_threaded_mainloop_unlock(self->loop);
1745
1746     return ret;
1747 }
1748
1749
1750 static void ALCpulseCapture_lock(ALCpulseCapture *self)
1751 {
1752     pa_threaded_mainloop_lock(self->loop);
1753 }
1754
1755 static void ALCpulseCapture_unlock(ALCpulseCapture *self)
1756 {
1757     pa_threaded_mainloop_unlock(self->loop);
1758 }
1759
1760
1761 typedef struct ALCpulseBackendFactory {
1762     DERIVE_FROM_TYPE(ALCbackendFactory);
1763 } ALCpulseBackendFactory;
1764 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1765
1766 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory *self);
1767 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory *self);
1768 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory *self, ALCbackend_Type type);
1769 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory *self, enum DevProbe type);
1770 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
1771
1772 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1773
1774
1775 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1776 {
1777     ALCboolean ret = ALC_FALSE;
1778
1779     VECTOR_INIT(PlaybackDevices);
1780     VECTOR_INIT(CaptureDevices);
1781
1782     if(pulse_load())
1783     {
1784         pa_threaded_mainloop *loop;
1785
1786         pulse_ctx_flags = 0;
1787         if(!GetConfigValueBool(NULL, "pulse", "spawn-server", 1))
1788             pulse_ctx_flags |= PA_CONTEXT_NOAUTOSPAWN;
1789
1790         if((loop=pa_threaded_mainloop_new()) &&
1791            pa_threaded_mainloop_start(loop) >= 0)
1792         {
1793             pa_context *context;
1794
1795             pa_threaded_mainloop_lock(loop);
1796             context = connect_context(loop, AL_TRUE);
1797             if(context)
1798             {
1799                 ret = ALC_TRUE;
1800
1801                 /* Some libraries (Phonon, Qt) set some pulseaudio properties
1802                  * through environment variables, which causes all streams in
1803                  * the process to inherit them. This attempts to filter those
1804                  * properties out by setting them to 0-length data. */
1805                 prop_filter = pa_proplist_new();
1806                 pa_proplist_set(prop_filter, PA_PROP_MEDIA_ROLE, NULL, 0);
1807                 pa_proplist_set(prop_filter, "phonon.streamid", NULL, 0);
1808
1809                 pa_context_disconnect(context);
1810                 pa_context_unref(context);
1811             }
1812             pa_threaded_mainloop_unlock(loop);
1813             pa_threaded_mainloop_stop(loop);
1814         }
1815         if(loop)
1816             pa_threaded_mainloop_free(loop);
1817     }
1818
1819     return ret;
1820 }
1821
1822 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1823 {
1824     clear_devlist(&PlaybackDevices);
1825     VECTOR_DEINIT(PlaybackDevices);
1826
1827     clear_devlist(&CaptureDevices);
1828     VECTOR_DEINIT(CaptureDevices);
1829
1830     if(prop_filter)
1831         pa_proplist_free(prop_filter);
1832     prop_filter = NULL;
1833
1834     /* PulseAudio doesn't like being CloseLib'd sometimes */
1835 }
1836
1837 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type type)
1838 {
1839     if(type == ALCbackend_Playback || type == ALCbackend_Capture)
1840         return ALC_TRUE;
1841     return ALC_FALSE;
1842 }
1843
1844 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe type)
1845 {
1846     switch(type)
1847     {
1848         case ALL_DEVICE_PROBE:
1849             ALCpulsePlayback_probeDevices();
1850 #define APPEND_ALL_DEVICES_LIST(e)  AppendAllDevicesList(alstr_get_cstr((e)->name))
1851             VECTOR_FOR_EACH(const DevMap, PlaybackDevices, APPEND_ALL_DEVICES_LIST);
1852 #undef APPEND_ALL_DEVICES_LIST
1853             break;
1854
1855         case CAPTURE_DEVICE_PROBE:
1856             ALCpulseCapture_probeDevices();
1857 #define APPEND_CAPTURE_DEVICE_LIST(e) AppendCaptureDeviceList(alstr_get_cstr((e)->name))
1858             VECTOR_FOR_EACH(const DevMap, CaptureDevices, APPEND_CAPTURE_DEVICE_LIST);
1859 #undef APPEND_CAPTURE_DEVICE_LIST
1860             break;
1861     }
1862 }
1863
1864 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
1865 {
1866     if(type == ALCbackend_Playback)
1867     {
1868         ALCpulsePlayback *backend;
1869         NEW_OBJ(backend, ALCpulsePlayback)(device);
1870         if(!backend) return NULL;
1871         return STATIC_CAST(ALCbackend, backend);
1872     }
1873     if(type == ALCbackend_Capture)
1874     {
1875         ALCpulseCapture *backend;
1876         NEW_OBJ(backend, ALCpulseCapture)(device);
1877         if(!backend) return NULL;
1878         return STATIC_CAST(ALCbackend, backend);
1879     }
1880
1881     return NULL;
1882 }
1883
1884
1885 #else /* PA_API_VERSION == 12 */
1886
1887 #warning "Unsupported API version, backend will be unavailable!"
1888
1889 typedef struct ALCpulseBackendFactory {
1890     DERIVE_FROM_TYPE(ALCbackendFactory);
1891 } ALCpulseBackendFactory;
1892 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1893
1894 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1895 {
1896     return ALC_FALSE;
1897 }
1898
1899 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1900 {
1901 }
1902
1903 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type UNUSED(type))
1904 {
1905     return ALC_FALSE;
1906 }
1907
1908 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe UNUSED(type))
1909 {
1910 }
1911
1912 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice* UNUSED(device), ALCbackend_Type UNUSED(type))
1913 {
1914     return NULL;
1915 }
1916
1917 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1918
1919 #endif /* PA_API_VERSION == 12 */
1920
1921 ALCbackendFactory *ALCpulseBackendFactory_getFactory(void)
1922 {
1923     static ALCpulseBackendFactory factory = ALCPULSEBACKENDFACTORY_INITIALIZER;
1924     return STATIC_CAST(ALCbackendFactory, &factory);
1925 }