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 }
 630
 631 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata)
 632 {
 633     ALCpulsePlayback *self = pdata;
 634     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
 635     {
 636         ERR("Received context failure!\n");
 637         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 638     }
 639     pa_threaded_mainloop_signal(self->loop, 0);
 640 }
 641
 642 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata)
 643 {
 644     ALCpulsePlayback *self = pdata;
 645     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
 646     {
 647         ERR("Received stream failure!\n");
 648         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 649     }
 650     pa_threaded_mainloop_signal(self->loop, 0);
 651 }
 652
 653 static void ALCpulsePlayback_streamWriteCallback(pa_stream* UNUSED(p), size_t UNUSED(nbytes), void *pdata)
 654 {
 655     ALCpulsePlayback *self = pdata;
 656     pa_threaded_mainloop_signal(self->loop, 0);
 657 }
 658
 659 static void ALCpulsePlayback_sinkInfoCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 660 {
 661     static const struct {
 662         enum DevFmtChannels chans;
 663         pa_channel_map map;
 664     } chanmaps[] = {
 665         { DevFmtX71, { 8, {
 666             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 667             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 668             PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
 669             PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
 670         } } },
 671         { DevFmtX61, { 7, {
 672             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 673             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 674             PA_CHANNEL_POSITION_REAR_CENTER,
 675             PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
 676         } } },
 677         { DevFmtX51, { 6, {
 678             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 679             PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
 680             PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
 681         } } },
 682         { DevFmtX51Rear, { 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_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT
 686         } } },
 687         { DevFmtQuad, { 4, {
 688             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
 689             PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT
 690         } } },
 691         { DevFmtStereo, { 2, {
 692             PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT
 693         } } },
 694         { DevFmtMono, { 1, {PA_CHANNEL_POSITION_MONO} } }
 695     };
 696     ALCpulsePlayback *self = pdata;
 697     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 698     size_t i;
 699
 700     if(eol)
 701     {
 702         pa_threaded_mainloop_signal(self->loop, 0);
 703         return;
 704     }
 705
 706     for(i = 0;i < COUNTOF(chanmaps);i++)
 707     {
 708         if(pa_channel_map_superset(&info->channel_map, &chanmaps[i].map))
 709         {
 710             if(!(device->Flags&DEVICE_CHANNELS_REQUEST))
 711                 device->FmtChans = chanmaps[i].chans;
 712             break;
 713         }
 714     }
 715     if(i == COUNTOF(chanmaps))
 716     {
 717         char chanmap_str[PA_CHANNEL_MAP_SNPRINT_MAX] = "";
 718         pa_channel_map_snprint(chanmap_str, sizeof(chanmap_str), &info->channel_map);
 719         WARN("Failed to find format for channel map:\n    %s\n", chanmap_str);
 720     }
 721
 722     if(info->active_port)
 723         TRACE("Active port: %s (%s)\n", info->active_port->name, info->active_port->description);
 724     device->IsHeadphones = (info->active_port &&
 725                             strcmp(info->active_port->name, "analog-output-headphones") == 0 &&
 726                             device->FmtChans == DevFmtStereo);
 727 }
 728
 729 static void ALCpulsePlayback_sinkNameCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 730 {
 731     ALCpulsePlayback *self = pdata;
 732     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 733
 734     if(eol)
 735     {
 736         pa_threaded_mainloop_signal(self->loop, 0);
 737         return;
 738     }
 739
 740     alstr_copy_cstr(&device->DeviceName, info->description);
 741 }
 742
 743
 744 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata)
 745 {
 746     ALCpulsePlayback *self = pdata;
 747
 748     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
 749
 750     TRACE("Stream moved to %s\n", alstr_get_cstr(self->device_name));
 751 }
 752
 753
 754 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name,
 755     pa_threaded_mainloop *loop, pa_context *context,
 756     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
 757     pa_channel_map *chanmap)
 758 {
 759     pa_stream_state_t state;
 760     pa_stream *stream;
 761
 762     stream = pa_stream_new_with_proplist(context, "Playback Stream", spec, chanmap, prop_filter);
 763     if(!stream)
 764     {
 765         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
 766         return NULL;
 767     }
 768
 769     pa_stream_set_state_callback(stream, stream_state_callback, loop);
 770
 771     if(pa_stream_connect_playback(stream, device_name, attr, flags, NULL, NULL) < 0)
 772     {
 773         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
 774         pa_stream_unref(stream);
 775         return NULL;
 776     }
 777
 778     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
 779     {
 780         if(!PA_STREAM_IS_GOOD(state))
 781         {
 782             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
 783             pa_stream_unref(stream);
 784             return NULL;
 785         }
 786
 787         pa_threaded_mainloop_wait(loop);
 788     }
 789     pa_stream_set_state_callback(stream, NULL, NULL);
 790
 791     return stream;
 792 }
 793
 794
 795 static int ALCpulsePlayback_mixerProc(void *ptr)
 796 {
 797     ALCpulsePlayback *self = ptr;
 798     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 799     ALuint buffer_size;
 800     ALint update_size;
 801     size_t frame_size;
 802     ssize_t len;
 803
 804     SetRTPriority();
 805     althrd_setname(althrd_current(), MIXER_THREAD_NAME);
 806
 807     pa_threaded_mainloop_lock(self->loop);
 808     frame_size = pa_frame_size(&self->spec);
 809     update_size = device->UpdateSize * frame_size;
 810
 811     /* Sanitize buffer metrics, in case we actually have less than what we
 812      * asked for. */
 813     buffer_size = minu(update_size*device->NumUpdates, self->attr.tlength);
 814     update_size = minu(update_size, buffer_size/2);
 815     do {
 816         len = pa_stream_writable_size(self->stream) - self->attr.tlength +
 817               buffer_size;
 818         if(len < update_size)
 819         {
 820             if(pa_stream_is_corked(self->stream) == 1)
 821             {
 822                 pa_operation *o;
 823                 o = pa_stream_cork(self->stream, 0, NULL, NULL);
 824                 if(o) pa_operation_unref(o);
 825             }
 826             pa_threaded_mainloop_wait(self->loop);
 827             continue;
 828         }
 829         len -= len%update_size;
 830
 831         while(len > 0)
 832         {
 833             size_t newlen = len;
 834             void *buf;
 835             pa_free_cb_t free_func = NULL;
 836
 837             if(pa_stream_begin_write(self->stream, &buf, &newlen) < 0)
 838             {
 839                 buf = pa_xmalloc(newlen);
 840                 free_func = pa_xfree;
 841             }
 842
 843             aluMixData(device, buf, newlen/frame_size);
 844
 845             pa_stream_write(self->stream, buf, newlen, free_func, 0, PA_SEEK_RELATIVE);
 846             len -= newlen;
 847         }
 848     } while(!self->killNow && device->Connected);
 849     pa_threaded_mainloop_unlock(self->loop);
 850
 851     return 0;
 852 }
 853
 854
 855 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name)
 856 {
 857     const_al_string dev_name = AL_STRING_INIT_STATIC();
 858     const char *pulse_name = NULL;
 859     pa_stream_flags_t flags;
 860     pa_sample_spec spec;
 861
 862     if(name)
 863     {
 864         const DevMap *iter;
 865
 866         if(VECTOR_SIZE(PlaybackDevices) == 0)
 867             ALCpulsePlayback_probeDevices();
 868
 869 #define MATCH_NAME(iter) (alstr_cmp_cstr((iter)->name, name) == 0)
 870         VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_NAME);
 871 #undef MATCH_NAME
 872         if(iter == VECTOR_END(PlaybackDevices))
 873             return ALC_INVALID_VALUE;
 874         pulse_name = alstr_get_cstr(iter->device_name);
 875         dev_name = iter->name;
 876     }
 877
 878     if(!pulse_open(&self->loop, &self->context, ALCpulsePlayback_contextStateCallback, self))
 879         return ALC_INVALID_VALUE;
 880
 881     pa_threaded_mainloop_lock(self->loop);
 882
 883     flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 884             PA_STREAM_FIX_CHANNELS;
 885     if(!GetConfigValueBool(NULL, "pulse", "allow-moves", 0))
 886         flags |= PA_STREAM_DONT_MOVE;
 887
 888     spec.format = PA_SAMPLE_S16NE;
 889     spec.rate = 44100;
 890     spec.channels = 2;
 891
 892     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
 893     self->stream = ALCpulsePlayback_connectStream(pulse_name, self->loop, self->context,
 894                                                   flags, NULL, &spec, NULL);
 895     if(!self->stream)
 896     {
 897         pa_threaded_mainloop_unlock(self->loop);
 898         pulse_close(self->loop, self->context, self->stream);
 899         self->loop = NULL;
 900         self->context = NULL;
 901         return ALC_INVALID_VALUE;
 902     }
 903     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
 904
 905     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
 906     if(alstr_empty(dev_name))
 907     {
 908         pa_operation *o = pa_context_get_sink_info_by_name(
 909             self->context, alstr_get_cstr(self->device_name),
 910             ALCpulsePlayback_sinkNameCallback, self
 911         );
 912         wait_for_operation(o, self->loop);
 913     }
 914     else
 915     {
 916         ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 917         alstr_copy(&device->DeviceName, dev_name);
 918     }
 919
 920     pa_threaded_mainloop_unlock(self->loop);
 921
 922     return ALC_NO_ERROR;
 923 }
 924
 925 static void ALCpulsePlayback_close(ALCpulsePlayback *self)
 926 {
 927     pulse_close(self->loop, self->context, self->stream);
 928     self->loop = NULL;
 929     self->context = NULL;
 930     self->stream = NULL;
 931
 932     alstr_clear(&self->device_name);
 933 }
 934
 935 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self)
 936 {
 937     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 938     pa_stream_flags_t flags = 0;
 939     const char *mapname = NULL;
 940     pa_channel_map chanmap;
 941     pa_operation *o;
 942     ALuint len;
 943
 944     pa_threaded_mainloop_lock(self->loop);
 945
 946     if(self->stream)
 947     {
 948         pa_stream_set_state_callback(self->stream, NULL, NULL);
 949         pa_stream_set_moved_callback(self->stream, NULL, NULL);
 950         pa_stream_set_write_callback(self->stream, NULL, NULL);
 951         pa_stream_set_buffer_attr_callback(self->stream, NULL, NULL);
 952         pa_stream_disconnect(self->stream);
 953         pa_stream_unref(self->stream);
 954         self->stream = NULL;
 955     }
 956
 957     o = pa_context_get_sink_info_by_name(self->context, alstr_get_cstr(self->device_name),
 958                                          ALCpulsePlayback_sinkInfoCallback, self);
 959     wait_for_operation(o, self->loop);
 960
 961     if(GetConfigValueBool(alstr_get_cstr(device->DeviceName), "pulse", "fix-rate", 0) ||
 962        !(device->Flags&DEVICE_FREQUENCY_REQUEST))
 963         flags |= PA_STREAM_FIX_RATE;
 964     flags |= PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
 965     flags |= PA_STREAM_ADJUST_LATENCY;
 966     flags |= PA_STREAM_START_CORKED;
 967     if(!GetConfigValueBool(NULL, "pulse", "allow-moves", 0))
 968         flags |= PA_STREAM_DONT_MOVE;
 969
 970     switch(device->FmtType)
 971     {
 972         case DevFmtByte:
 973             device->FmtType = DevFmtUByte;
 974             /* fall-through */
 975         case DevFmtUByte:
 976             self->spec.format = PA_SAMPLE_U8;
 977             break;
 978         case DevFmtUShort:
 979             device->FmtType = DevFmtShort;
 980             /* fall-through */
 981         case DevFmtShort:
 982             self->spec.format = PA_SAMPLE_S16NE;
 983             break;
 984         case DevFmtUInt:
 985             device->FmtType = DevFmtInt;
 986             /* fall-through */
 987         case DevFmtInt:
 988             self->spec.format = PA_SAMPLE_S32NE;
 989             break;
 990         case DevFmtFloat:
 991             self->spec.format = PA_SAMPLE_FLOAT32NE;
 992             break;
 993     }
 994     self->spec.rate = device->Frequency;
 995     self->spec.channels = ChannelsFromDevFmt(device->FmtChans);
 996
 997     if(pa_sample_spec_valid(&self->spec) == 0)
 998     {
 999         ERR("Invalid sample format\n");
1000         pa_threaded_mainloop_unlock(self->loop);
1001         return ALC_FALSE;
1002     }
1003
1004     switch(device->FmtChans)
1005     {
1006         case DevFmtMono:
1007             mapname = "mono";
1008             break;
1009         case DevFmtAmbi1:
1010         case DevFmtAmbi2:
1011         case DevFmtAmbi3:
1012             device->FmtChans = DevFmtStereo;
1013             /*fall-through*/
1014         case DevFmtStereo:
1015             mapname = "front-left,front-right";
1016             break;
1017         case DevFmtQuad:
1018             mapname = "front-left,front-right,rear-left,rear-right";
1019             break;
1020         case DevFmtX51:
1021             mapname = "front-left,front-right,front-center,lfe,side-left,side-right";
1022             break;
1023         case DevFmtX51Rear:
1024             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right";
1025             break;
1026         case DevFmtX61:
1027             mapname = "front-left,front-right,front-center,lfe,rear-center,side-left,side-right";
1028             break;
1029         case DevFmtX71:
1030             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right";
1031             break;
1032     }
1033     if(!pa_channel_map_parse(&chanmap, mapname))
1034     {
1035         ERR("Failed to build channel map for %s\n", DevFmtChannelsString(device->FmtChans));
1036         pa_threaded_mainloop_unlock(self->loop);
1037         return ALC_FALSE;
1038     }
1039     SetDefaultWFXChannelOrder(device);
1040
1041     self->attr.fragsize = -1;
1042     self->attr.prebuf = 0;
1043     self->attr.minreq = device->UpdateSize * pa_frame_size(&self->spec);
1044     self->attr.tlength = self->attr.minreq * maxu(device->NumUpdates, 2);
1045     self->attr.maxlength = -1;
1046
1047     self->stream = ALCpulsePlayback_connectStream(alstr_get_cstr(self->device_name),
1048                                                   self->loop, self->context, flags,
1049                                                   &self->attr, &self->spec, &chanmap);
1050     if(!self->stream)
1051     {
1052         pa_threaded_mainloop_unlock(self->loop);
1053         return ALC_FALSE;
1054     }
1055     pa_stream_set_state_callback(self->stream, ALCpulsePlayback_streamStateCallback, self);
1056     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
1057     pa_stream_set_write_callback(self->stream, ALCpulsePlayback_streamWriteCallback, self);
1058
1059     self->spec = *(pa_stream_get_sample_spec(self->stream));
1060     if(device->Frequency != self->spec.rate)
1061     {
1062         /* Server updated our playback rate, so modify the buffer attribs
1063          * accordingly. */
1064         device->NumUpdates = (ALuint)clampd(
1065             (ALdouble)device->NumUpdates/device->Frequency*self->spec.rate + 0.5, 2.0, 16.0
1066         );
1067
1068         self->attr.minreq  = device->UpdateSize * pa_frame_size(&self->spec);
1069         self->attr.tlength = self->attr.minreq * device->NumUpdates;
1070         self->attr.maxlength = -1;
1071         self->attr.prebuf  = 0;
1072
1073         o = pa_stream_set_buffer_attr(self->stream, &self->attr,
1074                                       stream_success_callback, self->loop);
1075         wait_for_operation(o, self->loop);
1076
1077         device->Frequency = self->spec.rate;
1078     }
1079
1080     pa_stream_set_buffer_attr_callback(self->stream, ALCpulsePlayback_bufferAttrCallback, self);
1081     ALCpulsePlayback_bufferAttrCallback(self->stream, self);
1082
1083     len = self->attr.minreq / pa_frame_size(&self->spec);
1084     device->NumUpdates = (ALuint)clampd(
1085         (ALdouble)device->NumUpdates/len*device->UpdateSize + 0.5, 2.0, 16.0
1086     );
1087     device->UpdateSize = len;
1088
1089     /* HACK: prebuf should be 0 as that's what we set it to. However on some
1090      * systems it comes back as non-0, so we have to make sure the device will
1091      * write enough audio to start playback. The lack of manual start control
1092      * may have unintended consequences, but it's better than not starting at
1093      * all.
1094      */
1095     if(self->attr.prebuf != 0)
1096     {
1097         len = self->attr.prebuf / pa_frame_size(&self->spec);
1098         if(len <= device->UpdateSize*device->NumUpdates)
1099             ERR("Non-0 prebuf, %u samples (%u bytes), device has %u samples\n",
1100                 len, self->attr.prebuf, device->UpdateSize*device->NumUpdates);
1101         else
1102         {
1103             ERR("Large prebuf, %u samples (%u bytes), increasing device from %u samples",
1104                 len, self->attr.prebuf, device->UpdateSize*device->NumUpdates);
1105             device->NumUpdates = (len+device->UpdateSize-1) / device->UpdateSize;
1106         }
1107     }
1108
1109     pa_threaded_mainloop_unlock(self->loop);
1110     return ALC_TRUE;
1111 }
1112
1113 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self)
1114 {
1115     self->killNow = AL_FALSE;
1116     if(althrd_create(&self->thread, ALCpulsePlayback_mixerProc, self) != althrd_success)
1117         return ALC_FALSE;
1118     return ALC_TRUE;
1119 }
1120
1121 static void ALCpulsePlayback_stop(ALCpulsePlayback *self)
1122 {
1123     pa_operation *o;
1124     int res;
1125
1126     if(!self->stream || self->killNow)
1127         return;
1128
1129     self->killNow = AL_TRUE;
1130     /* Signal the main loop in case PulseAudio isn't sending us audio requests
1131      * (e.g. if the device is suspended). We need to lock the mainloop in case
1132      * the mixer is between checking the killNow flag but before waiting for
1133      * the signal.
1134      */
1135     pa_threaded_mainloop_lock(self->loop);
1136     pa_threaded_mainloop_unlock(self->loop);
1137     pa_threaded_mainloop_signal(self->loop, 0);
1138     althrd_join(self->thread, &res);
1139
1140     pa_threaded_mainloop_lock(self->loop);
1141
1142     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1143     wait_for_operation(o, self->loop);
1144
1145     pa_threaded_mainloop_unlock(self->loop);
1146 }
1147
1148
1149 static ClockLatency ALCpulsePlayback_getClockLatency(ALCpulsePlayback *self)
1150 {
1151     pa_usec_t latency = 0;
1152     ClockLatency ret;
1153     int neg, err;
1154
1155     pa_threaded_mainloop_lock(self->loop);
1156     ret.ClockTime = GetDeviceClockTime(STATIC_CAST(ALCbackend,self)->mDevice);
1157     if((err=pa_stream_get_latency(self->stream, &latency, &neg)) != 0)
1158     {
1159         /* FIXME: if err = -PA_ERR_NODATA, it means we were called too soon
1160          * after starting the stream and no timing info has been received from
1161          * the server yet. Should we wait, possibly stalling the app, or give a
1162          * dummy value? Either way, it shouldn't be 0. */
1163         if(err != -PA_ERR_NODATA)
1164             ERR("Failed to get stream latency: 0x%x\n", err);
1165         latency = 0;
1166         neg = 0;
1167     }
1168     if(neg) latency = 0;
1169     ret.Latency = minu64(latency, U64(0xffffffffffffffff)/1000) * 1000;
1170     pa_threaded_mainloop_unlock(self->loop);
1171
1172     return ret;
1173 }
1174
1175
1176 static void ALCpulsePlayback_lock(ALCpulsePlayback *self)
1177 {
1178     pa_threaded_mainloop_lock(self->loop);
1179 }
1180
1181 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self)
1182 {
1183     pa_threaded_mainloop_unlock(self->loop);
1184 }
1185
1186
1187 typedef struct ALCpulseCapture {
1188     DERIVE_FROM_TYPE(ALCbackend);
1189
1190     al_string device_name;
1191
1192     const void *cap_store;
1193     size_t cap_len;
1194     size_t cap_remain;
1195
1196     ALCuint last_readable;
1197
1198     pa_buffer_attr attr;
1199     pa_sample_spec spec;
1200
1201     pa_threaded_mainloop *loop;
1202
1203     pa_stream *stream;
1204     pa_context *context;
1205 } ALCpulseCapture;
1206
1207 static void ALCpulseCapture_deviceCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1208 static void ALCpulseCapture_probeDevices(void);
1209
1210 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata);
1211 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata);
1212 static void ALCpulseCapture_sourceNameCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1213 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata);
1214 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1215                                                 pa_threaded_mainloop *loop, pa_context *context,
1216                                                 pa_stream_flags_t flags, pa_buffer_attr *attr,
1217                                                 pa_sample_spec *spec, pa_channel_map *chanmap);
1218
1219 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device);
1220 static void ALCpulseCapture_Destruct(ALCpulseCapture *self);
1221 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name);
1222 static void ALCpulseCapture_close(ALCpulseCapture *self);
1223 static DECLARE_FORWARD(ALCpulseCapture, ALCbackend, ALCboolean, reset)
1224 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self);
1225 static void ALCpulseCapture_stop(ALCpulseCapture *self);
1226 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples);
1227 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self);
1228 static ClockLatency ALCpulseCapture_getClockLatency(ALCpulseCapture *self);
1229 static void ALCpulseCapture_lock(ALCpulseCapture *self);
1230 static void ALCpulseCapture_unlock(ALCpulseCapture *self);
1231 DECLARE_DEFAULT_ALLOCATORS(ALCpulseCapture)
1232
1233 DEFINE_ALCBACKEND_VTABLE(ALCpulseCapture);
1234
1235
1236 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device)
1237 {
1238     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
1239     SET_VTABLE2(ALCpulseCapture, ALCbackend, self);
1240
1241     AL_STRING_INIT(self->device_name);
1242 }
1243
1244 static void ALCpulseCapture_Destruct(ALCpulseCapture *self)
1245 {
1246     AL_STRING_DEINIT(self->device_name);
1247     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
1248 }
1249
1250
1251 static void ALCpulseCapture_deviceCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1252 {
1253     pa_threaded_mainloop *loop = pdata;
1254     const DevMap *iter;
1255     DevMap entry;
1256     int count;
1257
1258     if(eol)
1259     {
1260         pa_threaded_mainloop_signal(loop, 0);
1261         return;
1262     }
1263
1264 #define MATCH_INFO_NAME(iter) (alstr_cmp_cstr((iter)->device_name, info->name) == 0)
1265     VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_INFO_NAME);
1266     if(iter != VECTOR_END(CaptureDevices)) return;
1267 #undef MATCH_INFO_NAME
1268
1269     AL_STRING_INIT(entry.name);
1270     AL_STRING_INIT(entry.device_name);
1271
1272     alstr_copy_cstr(&entry.device_name, info->name);
1273
1274     count = 0;
1275     while(1)
1276     {
1277         alstr_copy_cstr(&entry.name, info->description);
1278         if(count != 0)
1279         {
1280             char str[64];
1281             snprintf(str, sizeof(str), " #%d", count+1);
1282             alstr_append_cstr(&entry.name, str);
1283         }
1284
1285 #define MATCH_ENTRY(i) (alstr_cmp(entry.name, (i)->name) == 0)
1286         VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_ENTRY);
1287         if(iter == VECTOR_END(CaptureDevices)) break;
1288 #undef MATCH_ENTRY
1289         count++;
1290     }
1291
1292     TRACE("Got device \"%s\", \"%s\"\n", alstr_get_cstr(entry.name), alstr_get_cstr(entry.device_name));
1293
1294     VECTOR_PUSH_BACK(CaptureDevices, entry);
1295 }
1296
1297 static void ALCpulseCapture_probeDevices(void)
1298 {
1299     pa_threaded_mainloop *loop;
1300
1301     clear_devlist(&CaptureDevices);
1302
1303     if((loop=pa_threaded_mainloop_new()) &&
1304        pa_threaded_mainloop_start(loop) >= 0)
1305     {
1306         pa_context *context;
1307
1308         pa_threaded_mainloop_lock(loop);
1309         context = connect_context(loop, AL_FALSE);
1310         if(context)
1311         {
1312             pa_operation *o;
1313             pa_stream_flags_t flags;
1314             pa_sample_spec spec;
1315             pa_stream *stream;
1316
1317             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
1318                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
1319
1320             spec.format = PA_SAMPLE_S16NE;
1321             spec.rate = 44100;
1322             spec.channels = 1;
1323
1324             stream = ALCpulseCapture_connectStream(NULL, loop, context, flags,
1325                                                    NULL, &spec, NULL);
1326             if(stream)
1327             {
1328                 o = pa_context_get_source_info_by_name(context, pa_stream_get_device_name(stream),
1329                                                        ALCpulseCapture_deviceCallback, loop);
1330                 wait_for_operation(o, loop);
1331
1332                 pa_stream_disconnect(stream);
1333                 pa_stream_unref(stream);
1334                 stream = NULL;
1335             }
1336
1337             o = pa_context_get_source_info_list(context, ALCpulseCapture_deviceCallback, loop);
1338             wait_for_operation(o, loop);
1339
1340             pa_context_disconnect(context);
1341             pa_context_unref(context);
1342         }
1343         pa_threaded_mainloop_unlock(loop);
1344         pa_threaded_mainloop_stop(loop);
1345     }
1346     if(loop)
1347         pa_threaded_mainloop_free(loop);
1348 }
1349
1350
1351 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata)
1352 {
1353     ALCpulseCapture *self = pdata;
1354     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
1355     {
1356         ERR("Received context failure!\n");
1357         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1358     }
1359     pa_threaded_mainloop_signal(self->loop, 0);
1360 }
1361
1362 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata)
1363 {
1364     ALCpulseCapture *self = pdata;
1365     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
1366     {
1367         ERR("Received stream failure!\n");
1368         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1369     }
1370     pa_threaded_mainloop_signal(self->loop, 0);
1371 }
1372
1373
1374 static void ALCpulseCapture_sourceNameCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1375 {
1376     ALCpulseCapture *self = pdata;
1377     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1378
1379     if(eol)
1380     {
1381         pa_threaded_mainloop_signal(self->loop, 0);
1382         return;
1383     }
1384
1385     alstr_copy_cstr(&device->DeviceName, info->description);
1386 }
1387
1388
1389 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata)
1390 {
1391     ALCpulseCapture *self = pdata;
1392
1393     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
1394
1395     TRACE("Stream moved to %s\n", alstr_get_cstr(self->device_name));
1396 }
1397
1398
1399 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1400     pa_threaded_mainloop *loop, pa_context *context,
1401     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
1402     pa_channel_map *chanmap)
1403 {
1404     pa_stream_state_t state;
1405     pa_stream *stream;
1406
1407     stream = pa_stream_new_with_proplist(context, "Capture Stream", spec, chanmap, prop_filter);
1408     if(!stream)
1409     {
1410         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
1411         return NULL;
1412     }
1413
1414     pa_stream_set_state_callback(stream, stream_state_callback, loop);
1415
1416     if(pa_stream_connect_record(stream, device_name, attr, flags) < 0)
1417     {
1418         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
1419         pa_stream_unref(stream);
1420         return NULL;
1421     }
1422
1423     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
1424     {
1425         if(!PA_STREAM_IS_GOOD(state))
1426         {
1427             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
1428             pa_stream_unref(stream);
1429             return NULL;
1430         }
1431
1432         pa_threaded_mainloop_wait(loop);
1433     }
1434     pa_stream_set_state_callback(stream, NULL, NULL);
1435
1436     return stream;
1437 }
1438
1439
1440 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name)
1441 {
1442     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1443     const char *pulse_name = NULL;
1444     pa_stream_flags_t flags = 0;
1445     pa_channel_map chanmap;
1446     ALuint samples;
1447
1448     if(name)
1449     {
1450         const DevMap *iter;
1451
1452         if(VECTOR_SIZE(CaptureDevices) == 0)
1453             ALCpulseCapture_probeDevices();
1454
1455 #define MATCH_NAME(iter) (alstr_cmp_cstr((iter)->name, name) == 0)
1456         VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_NAME);
1457 #undef MATCH_NAME
1458         if(iter == VECTOR_END(CaptureDevices))
1459             return ALC_INVALID_VALUE;
1460         pulse_name = alstr_get_cstr(iter->device_name);
1461         alstr_copy(&device->DeviceName, iter->name);
1462     }
1463
1464     if(!pulse_open(&self->loop, &self->context, ALCpulseCapture_contextStateCallback, self))
1465         return ALC_INVALID_VALUE;
1466
1467     pa_threaded_mainloop_lock(self->loop);
1468
1469     self->spec.rate = device->Frequency;
1470     self->spec.channels = ChannelsFromDevFmt(device->FmtChans);
1471
1472     switch(device->FmtType)
1473     {
1474         case DevFmtUByte:
1475             self->spec.format = PA_SAMPLE_U8;
1476             break;
1477         case DevFmtShort:
1478             self->spec.format = PA_SAMPLE_S16NE;
1479             break;
1480         case DevFmtInt:
1481             self->spec.format = PA_SAMPLE_S32NE;
1482             break;
1483         case DevFmtFloat:
1484             self->spec.format = PA_SAMPLE_FLOAT32NE;
1485             break;
1486         case DevFmtByte:
1487         case DevFmtUShort:
1488         case DevFmtUInt:
1489             ERR("%s capture samples not supported\n", DevFmtTypeString(device->FmtType));
1490             pa_threaded_mainloop_unlock(self->loop);
1491             goto fail;
1492     }
1493
1494     if(pa_sample_spec_valid(&self->spec) == 0)
1495     {
1496         ERR("Invalid sample format\n");
1497         pa_threaded_mainloop_unlock(self->loop);
1498         goto fail;
1499     }
1500
1501     if(!pa_channel_map_init_auto(&chanmap, self->spec.channels, PA_CHANNEL_MAP_WAVEEX))
1502     {
1503         ERR("Couldn't build map for channel count (%d)!\n", self->spec.channels);
1504         pa_threaded_mainloop_unlock(self->loop);
1505         goto fail;
1506     }
1507
1508     samples = device->UpdateSize * device->NumUpdates;
1509     samples = maxu(samples, 100 * device->Frequency / 1000);
1510
1511     self->attr.minreq = -1;
1512     self->attr.prebuf = -1;
1513     self->attr.maxlength = samples * pa_frame_size(&self->spec);
1514     self->attr.tlength = -1;
1515     self->attr.fragsize = minu(samples, 50*device->Frequency/1000) *
1516                           pa_frame_size(&self->spec);
1517
1518     flags |= PA_STREAM_START_CORKED|PA_STREAM_ADJUST_LATENCY;
1519     if(!GetConfigValueBool(NULL, "pulse", "allow-moves", 0))
1520         flags |= PA_STREAM_DONT_MOVE;
1521
1522     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
1523     self->stream = ALCpulseCapture_connectStream(pulse_name, self->loop, self->context,
1524                                                  flags, &self->attr, &self->spec,
1525                                                  &chanmap);
1526     if(!self->stream)
1527     {
1528         pa_threaded_mainloop_unlock(self->loop);
1529         goto fail;
1530     }
1531     pa_stream_set_moved_callback(self->stream, ALCpulseCapture_streamMovedCallback, self);
1532     pa_stream_set_state_callback(self->stream, ALCpulseCapture_streamStateCallback, self);
1533
1534     alstr_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
1535     if(alstr_empty(device->DeviceName))
1536     {
1537         pa_operation *o = pa_context_get_source_info_by_name(
1538             self->context, alstr_get_cstr(self->device_name),
1539             ALCpulseCapture_sourceNameCallback, self
1540         );
1541         wait_for_operation(o, self->loop);
1542     }
1543
1544     pa_threaded_mainloop_unlock(self->loop);
1545     return ALC_NO_ERROR;
1546
1547 fail:
1548     pulse_close(self->loop, self->context, self->stream);
1549     self->loop = NULL;
1550     self->context = NULL;
1551     self->stream = NULL;
1552
1553     return ALC_INVALID_VALUE;
1554 }
1555
1556 static void ALCpulseCapture_close(ALCpulseCapture *self)
1557 {
1558     pulse_close(self->loop, self->context, self->stream);
1559     self->loop = NULL;
1560     self->context = NULL;
1561     self->stream = NULL;
1562
1563     alstr_clear(&self->device_name);
1564 }
1565
1566 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self)
1567 {
1568     pa_operation *o;
1569     pa_threaded_mainloop_lock(self->loop);
1570     o = pa_stream_cork(self->stream, 0, stream_success_callback, self->loop);
1571     wait_for_operation(o, self->loop);
1572     pa_threaded_mainloop_unlock(self->loop);
1573     return ALC_TRUE;
1574 }
1575
1576 static void ALCpulseCapture_stop(ALCpulseCapture *self)
1577 {
1578     pa_operation *o;
1579     pa_threaded_mainloop_lock(self->loop);
1580     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1581     wait_for_operation(o, self->loop);
1582     pa_threaded_mainloop_unlock(self->loop);
1583 }
1584
1585 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples)
1586 {
1587     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1588     ALCuint todo = samples * pa_frame_size(&self->spec);
1589
1590     /* Capture is done in fragment-sized chunks, so we loop until we get all
1591      * that's available */
1592     self->last_readable -= todo;
1593     pa_threaded_mainloop_lock(self->loop);
1594     while(todo > 0)
1595     {
1596         size_t rem = todo;
1597
1598         if(self->cap_len == 0)
1599         {
1600             pa_stream_state_t state;
1601
1602             state = pa_stream_get_state(self->stream);
1603             if(!PA_STREAM_IS_GOOD(state))
1604             {
1605                 aluHandleDisconnect(device);
1606                 break;
1607             }
1608             if(pa_stream_peek(self->stream, &self->cap_store, &self->cap_len) < 0)
1609             {
1610                 ERR("pa_stream_peek() failed: %s\n",
1611                     pa_strerror(pa_context_errno(self->context)));
1612                 aluHandleDisconnect(device);
1613                 break;
1614             }
1615             self->cap_remain = self->cap_len;
1616         }
1617         if(rem > self->cap_remain)
1618             rem = self->cap_remain;
1619
1620         memcpy(buffer, self->cap_store, rem);
1621
1622         buffer = (ALbyte*)buffer + rem;
1623         todo -= rem;
1624
1625         self->cap_store = (ALbyte*)self->cap_store + rem;
1626         self->cap_remain -= rem;
1627         if(self->cap_remain == 0)
1628         {
1629             pa_stream_drop(self->stream);
1630             self->cap_len = 0;
1631         }
1632     }
1633     pa_threaded_mainloop_unlock(self->loop);
1634     if(todo > 0)
1635         memset(buffer, ((device->FmtType==DevFmtUByte) ? 0x80 : 0), todo);
1636
1637     return ALC_NO_ERROR;
1638 }
1639
1640 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self)
1641 {
1642     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1643     size_t readable = self->cap_remain;
1644
1645     if(device->Connected)
1646     {
1647         ssize_t got;
1648         pa_threaded_mainloop_lock(self->loop);
1649         got = pa_stream_readable_size(self->stream);
1650         if(got < 0)
1651         {
1652             ERR("pa_stream_readable_size() failed: %s\n", pa_strerror(got));
1653             aluHandleDisconnect(device);
1654         }
1655         else if((size_t)got > self->cap_len)
1656             readable += got - self->cap_len;
1657         pa_threaded_mainloop_unlock(self->loop);
1658     }
1659
1660     if(self->last_readable < readable)
1661         self->last_readable = readable;
1662     return self->last_readable / pa_frame_size(&self->spec);
1663 }
1664
1665
1666 static ClockLatency ALCpulseCapture_getClockLatency(ALCpulseCapture *self)
1667 {
1668     pa_usec_t latency = 0;
1669     ClockLatency ret;
1670     int neg, err;
1671
1672     pa_threaded_mainloop_lock(self->loop);
1673     ret.ClockTime = GetDeviceClockTime(STATIC_CAST(ALCbackend,self)->mDevice);
1674     if((err=pa_stream_get_latency(self->stream, &latency, &neg)) != 0)
1675     {
1676         ERR("Failed to get stream latency: 0x%x\n", err);
1677         latency = 0;
1678         neg = 0;
1679     }
1680     if(neg) latency = 0;
1681     ret.Latency = minu64(latency, U64(0xffffffffffffffff)/1000) * 1000;
1682     pa_threaded_mainloop_unlock(self->loop);
1683
1684     return ret;
1685 }
1686
1687
1688 static void ALCpulseCapture_lock(ALCpulseCapture *self)
1689 {
1690     pa_threaded_mainloop_lock(self->loop);
1691 }
1692
1693 static void ALCpulseCapture_unlock(ALCpulseCapture *self)
1694 {
1695     pa_threaded_mainloop_unlock(self->loop);
1696 }
1697
1698
1699 typedef struct ALCpulseBackendFactory {
1700     DERIVE_FROM_TYPE(ALCbackendFactory);
1701 } ALCpulseBackendFactory;
1702 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1703
1704 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory *self);
1705 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory *self);
1706 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory *self, ALCbackend_Type type);
1707 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory *self, enum DevProbe type);
1708 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
1709
1710 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1711
1712
1713 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1714 {
1715     ALCboolean ret = ALC_FALSE;
1716
1717     VECTOR_INIT(PlaybackDevices);
1718     VECTOR_INIT(CaptureDevices);
1719
1720     if(pulse_load())
1721     {
1722         pa_threaded_mainloop *loop;
1723
1724         pulse_ctx_flags = 0;
1725         if(!GetConfigValueBool(NULL, "pulse", "spawn-server", 1))
1726             pulse_ctx_flags |= PA_CONTEXT_NOAUTOSPAWN;
1727
1728         if((loop=pa_threaded_mainloop_new()) &&
1729            pa_threaded_mainloop_start(loop) >= 0)
1730         {
1731             pa_context *context;
1732
1733             pa_threaded_mainloop_lock(loop);
1734             context = connect_context(loop, AL_TRUE);
1735             if(context)
1736             {
1737                 ret = ALC_TRUE;
1738
1739                 /* Some libraries (Phonon, Qt) set some pulseaudio properties
1740                  * through environment variables, which causes all streams in
1741                  * the process to inherit them. This attempts to filter those
1742                  * properties out by setting them to 0-length data. */
1743                 prop_filter = pa_proplist_new();
1744                 pa_proplist_set(prop_filter, PA_PROP_MEDIA_ROLE, NULL, 0);
1745                 pa_proplist_set(prop_filter, "phonon.streamid", NULL, 0);
1746
1747                 pa_context_disconnect(context);
1748                 pa_context_unref(context);
1749             }
1750             pa_threaded_mainloop_unlock(loop);
1751             pa_threaded_mainloop_stop(loop);
1752         }
1753         if(loop)
1754             pa_threaded_mainloop_free(loop);
1755     }
1756
1757     return ret;
1758 }
1759
1760 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1761 {
1762     clear_devlist(&PlaybackDevices);
1763     VECTOR_DEINIT(PlaybackDevices);
1764
1765     clear_devlist(&CaptureDevices);
1766     VECTOR_DEINIT(CaptureDevices);
1767
1768     if(prop_filter)
1769         pa_proplist_free(prop_filter);
1770     prop_filter = NULL;
1771
1772     /* PulseAudio doesn't like being CloseLib'd sometimes */
1773 }
1774
1775 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type type)
1776 {
1777     if(type == ALCbackend_Playback || type == ALCbackend_Capture)
1778         return ALC_TRUE;
1779     return ALC_FALSE;
1780 }
1781
1782 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe type)
1783 {
1784     switch(type)
1785     {
1786         case ALL_DEVICE_PROBE:
1787             ALCpulsePlayback_probeDevices();
1788 #define APPEND_ALL_DEVICES_LIST(e)  AppendAllDevicesList(alstr_get_cstr((e)->name))
1789             VECTOR_FOR_EACH(const DevMap, PlaybackDevices, APPEND_ALL_DEVICES_LIST);
1790 #undef APPEND_ALL_DEVICES_LIST
1791             break;
1792
1793         case CAPTURE_DEVICE_PROBE:
1794             ALCpulseCapture_probeDevices();
1795 #define APPEND_CAPTURE_DEVICE_LIST(e) AppendCaptureDeviceList(alstr_get_cstr((e)->name))
1796             VECTOR_FOR_EACH(const DevMap, CaptureDevices, APPEND_CAPTURE_DEVICE_LIST);
1797 #undef APPEND_CAPTURE_DEVICE_LIST
1798             break;
1799     }
1800 }
1801
1802 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
1803 {
1804     if(type == ALCbackend_Playback)
1805     {
1806         ALCpulsePlayback *backend;
1807         NEW_OBJ(backend, ALCpulsePlayback)(device);
1808         if(!backend) return NULL;
1809         return STATIC_CAST(ALCbackend, backend);
1810     }
1811     if(type == ALCbackend_Capture)
1812     {
1813         ALCpulseCapture *backend;
1814         NEW_OBJ(backend, ALCpulseCapture)(device);
1815         if(!backend) return NULL;
1816         return STATIC_CAST(ALCbackend, backend);
1817     }
1818
1819     return NULL;
1820 }
1821
1822
1823 #else /* PA_API_VERSION == 12 */
1824
1825 #warning "Unsupported API version, backend will be unavailable!"
1826
1827 typedef struct ALCpulseBackendFactory {
1828     DERIVE_FROM_TYPE(ALCbackendFactory);
1829 } ALCpulseBackendFactory;
1830 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1831
1832 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1833 {
1834     return ALC_FALSE;
1835 }
1836
1837 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1838 {
1839 }
1840
1841 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type UNUSED(type))
1842 {
1843     return ALC_FALSE;
1844 }
1845
1846 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe UNUSED(type))
1847 {
1848 }
1849
1850 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice* UNUSED(device), ALCbackend_Type UNUSED(type))
1851 {
1852     return NULL;
1853 }
1854
1855 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1856
1857 #endif /* PA_API_VERSION == 12 */
1858
1859 ALCbackendFactory *ALCpulseBackendFactory_getFactory(void)
1860 {
1861     static ALCpulseBackendFactory factory = ALCPULSEBACKENDFACTORY_INITIALIZER;
1862     return STATIC_CAST(ALCbackendFactory, &factory);
1863 }