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., 59 Temple Place - Suite 330,
  18  *  Boston, MA  02111-1307, 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 #ifndef PA_CHECK_VERSION
  38 #define PA_CHECK_VERSION(major,minor,micro)                             \
  39     ((PA_MAJOR > (major)) ||                                            \
  40      (PA_MAJOR == (major) && PA_MINOR > (minor)) ||                     \
  41      (PA_MAJOR == (major) && PA_MINOR == (minor) && PA_MICRO >= (micro)))
  42 #endif
  43
  44 #ifdef HAVE_DYNLOAD
  45 static void *pa_handle;
  46 #define MAKE_FUNC(x) static __typeof(x) * p##x
  47 MAKE_FUNC(pa_context_unref);
  48 MAKE_FUNC(pa_sample_spec_valid);
  49 MAKE_FUNC(pa_frame_size);
  50 MAKE_FUNC(pa_stream_drop);
  51 MAKE_FUNC(pa_strerror);
  52 MAKE_FUNC(pa_context_get_state);
  53 MAKE_FUNC(pa_stream_get_state);
  54 MAKE_FUNC(pa_threaded_mainloop_signal);
  55 MAKE_FUNC(pa_stream_peek);
  56 MAKE_FUNC(pa_threaded_mainloop_wait);
  57 MAKE_FUNC(pa_threaded_mainloop_unlock);
  58 MAKE_FUNC(pa_threaded_mainloop_in_thread);
  59 MAKE_FUNC(pa_context_new);
  60 MAKE_FUNC(pa_threaded_mainloop_stop);
  61 MAKE_FUNC(pa_context_disconnect);
  62 MAKE_FUNC(pa_threaded_mainloop_start);
  63 MAKE_FUNC(pa_threaded_mainloop_get_api);
  64 MAKE_FUNC(pa_context_set_state_callback);
  65 MAKE_FUNC(pa_stream_write);
  66 MAKE_FUNC(pa_xfree);
  67 MAKE_FUNC(pa_stream_connect_record);
  68 MAKE_FUNC(pa_stream_connect_playback);
  69 MAKE_FUNC(pa_stream_readable_size);
  70 MAKE_FUNC(pa_stream_writable_size);
  71 MAKE_FUNC(pa_stream_is_corked);
  72 MAKE_FUNC(pa_stream_cork);
  73 MAKE_FUNC(pa_stream_is_suspended);
  74 MAKE_FUNC(pa_stream_get_device_name);
  75 MAKE_FUNC(pa_stream_get_latency);
  76 MAKE_FUNC(pa_path_get_filename);
  77 MAKE_FUNC(pa_get_binary_name);
  78 MAKE_FUNC(pa_threaded_mainloop_free);
  79 MAKE_FUNC(pa_context_errno);
  80 MAKE_FUNC(pa_xmalloc);
  81 MAKE_FUNC(pa_stream_unref);
  82 MAKE_FUNC(pa_threaded_mainloop_accept);
  83 MAKE_FUNC(pa_stream_set_write_callback);
  84 MAKE_FUNC(pa_threaded_mainloop_new);
  85 MAKE_FUNC(pa_context_connect);
  86 MAKE_FUNC(pa_stream_set_buffer_attr);
  87 MAKE_FUNC(pa_stream_get_buffer_attr);
  88 MAKE_FUNC(pa_stream_get_sample_spec);
  89 MAKE_FUNC(pa_stream_get_time);
  90 MAKE_FUNC(pa_stream_set_read_callback);
  91 MAKE_FUNC(pa_stream_set_state_callback);
  92 MAKE_FUNC(pa_stream_set_moved_callback);
  93 MAKE_FUNC(pa_stream_set_underflow_callback);
  94 MAKE_FUNC(pa_stream_new_with_proplist);
  95 MAKE_FUNC(pa_stream_disconnect);
  96 MAKE_FUNC(pa_threaded_mainloop_lock);
  97 MAKE_FUNC(pa_channel_map_init_auto);
  98 MAKE_FUNC(pa_channel_map_parse);
  99 MAKE_FUNC(pa_channel_map_snprint);
 100 MAKE_FUNC(pa_channel_map_equal);
 101 MAKE_FUNC(pa_context_get_server_info);
 102 MAKE_FUNC(pa_context_get_sink_info_by_name);
 103 MAKE_FUNC(pa_context_get_sink_info_list);
 104 MAKE_FUNC(pa_context_get_source_info_by_name);
 105 MAKE_FUNC(pa_context_get_source_info_list);
 106 MAKE_FUNC(pa_operation_get_state);
 107 MAKE_FUNC(pa_operation_unref);
 108 MAKE_FUNC(pa_proplist_new);
 109 MAKE_FUNC(pa_proplist_free);
 110 MAKE_FUNC(pa_proplist_set);
 111 #if PA_CHECK_VERSION(0,9,15)
 112 MAKE_FUNC(pa_channel_map_superset);
 113 MAKE_FUNC(pa_stream_set_buffer_attr_callback);
 114 #endif
 115 #if PA_CHECK_VERSION(0,9,16)
 116 MAKE_FUNC(pa_stream_begin_write);
 117 #endif
 118 #undef MAKE_FUNC
 119
 120 #define pa_context_unref ppa_context_unref
 121 #define pa_sample_spec_valid ppa_sample_spec_valid
 122 #define pa_frame_size ppa_frame_size
 123 #define pa_stream_drop ppa_stream_drop
 124 #define pa_strerror ppa_strerror
 125 #define pa_context_get_state ppa_context_get_state
 126 #define pa_stream_get_state ppa_stream_get_state
 127 #define pa_threaded_mainloop_signal ppa_threaded_mainloop_signal
 128 #define pa_stream_peek ppa_stream_peek
 129 #define pa_threaded_mainloop_wait ppa_threaded_mainloop_wait
 130 #define pa_threaded_mainloop_unlock ppa_threaded_mainloop_unlock
 131 #define pa_threaded_mainloop_in_thread ppa_threaded_mainloop_in_thread
 132 #define pa_context_new ppa_context_new
 133 #define pa_threaded_mainloop_stop ppa_threaded_mainloop_stop
 134 #define pa_context_disconnect ppa_context_disconnect
 135 #define pa_threaded_mainloop_start ppa_threaded_mainloop_start
 136 #define pa_threaded_mainloop_get_api ppa_threaded_mainloop_get_api
 137 #define pa_context_set_state_callback ppa_context_set_state_callback
 138 #define pa_stream_write ppa_stream_write
 139 #define pa_xfree ppa_xfree
 140 #define pa_stream_connect_record ppa_stream_connect_record
 141 #define pa_stream_connect_playback ppa_stream_connect_playback
 142 #define pa_stream_readable_size ppa_stream_readable_size
 143 #define pa_stream_writable_size ppa_stream_writable_size
 144 #define pa_stream_is_corked ppa_stream_is_corked
 145 #define pa_stream_cork ppa_stream_cork
 146 #define pa_stream_is_suspended ppa_stream_is_suspended
 147 #define pa_stream_get_device_name ppa_stream_get_device_name
 148 #define pa_stream_get_latency ppa_stream_get_latency
 149 #define pa_path_get_filename ppa_path_get_filename
 150 #define pa_get_binary_name ppa_get_binary_name
 151 #define pa_threaded_mainloop_free ppa_threaded_mainloop_free
 152 #define pa_context_errno ppa_context_errno
 153 #define pa_xmalloc ppa_xmalloc
 154 #define pa_stream_unref ppa_stream_unref
 155 #define pa_threaded_mainloop_accept ppa_threaded_mainloop_accept
 156 #define pa_stream_set_write_callback ppa_stream_set_write_callback
 157 #define pa_threaded_mainloop_new ppa_threaded_mainloop_new
 158 #define pa_context_connect ppa_context_connect
 159 #define pa_stream_set_buffer_attr ppa_stream_set_buffer_attr
 160 #define pa_stream_get_buffer_attr ppa_stream_get_buffer_attr
 161 #define pa_stream_get_sample_spec ppa_stream_get_sample_spec
 162 #define pa_stream_get_time ppa_stream_get_time
 163 #define pa_stream_set_read_callback ppa_stream_set_read_callback
 164 #define pa_stream_set_state_callback ppa_stream_set_state_callback
 165 #define pa_stream_set_moved_callback ppa_stream_set_moved_callback
 166 #define pa_stream_set_underflow_callback ppa_stream_set_underflow_callback
 167 #define pa_stream_new_with_proplist ppa_stream_new_with_proplist
 168 #define pa_stream_disconnect ppa_stream_disconnect
 169 #define pa_threaded_mainloop_lock ppa_threaded_mainloop_lock
 170 #define pa_channel_map_init_auto ppa_channel_map_init_auto
 171 #define pa_channel_map_parse ppa_channel_map_parse
 172 #define pa_channel_map_snprint ppa_channel_map_snprint
 173 #define pa_channel_map_equal ppa_channel_map_equal
 174 #define pa_context_get_server_info ppa_context_get_server_info
 175 #define pa_context_get_sink_info_by_name ppa_context_get_sink_info_by_name
 176 #define pa_context_get_sink_info_list ppa_context_get_sink_info_list
 177 #define pa_context_get_source_info_by_name ppa_context_get_source_info_by_name
 178 #define pa_context_get_source_info_list ppa_context_get_source_info_list
 179 #define pa_operation_get_state ppa_operation_get_state
 180 #define pa_operation_unref ppa_operation_unref
 181 #define pa_proplist_new ppa_proplist_new
 182 #define pa_proplist_free ppa_proplist_free
 183 #define pa_proplist_set ppa_proplist_set
 184 #if PA_CHECK_VERSION(0,9,15)
 185 #define pa_channel_map_superset ppa_channel_map_superset
 186 #define pa_stream_set_buffer_attr_callback ppa_stream_set_buffer_attr_callback
 187 #endif
 188 #if PA_CHECK_VERSION(0,9,16)
 189 #define pa_stream_begin_write ppa_stream_begin_write
 190 #endif
 191
 192 #endif
 193
 194 static ALCboolean pulse_load(void)
 195 {
 196     ALCboolean ret = ALC_TRUE;
 197 #ifdef HAVE_DYNLOAD
 198     if(!pa_handle)
 199     {
 200 #ifdef _WIN32
 201 #define PALIB "libpulse-0.dll"
 202 #elif defined(__APPLE__) && defined(__MACH__)
 203 #define PALIB "libpulse.0.dylib"
 204 #else
 205 #define PALIB "libpulse.so.0"
 206 #endif
 207         pa_handle = LoadLib(PALIB);
 208         if(!pa_handle)
 209             return ALC_FALSE;
 210
 211 #define LOAD_FUNC(x) do {                                                     \
 212     p##x = GetSymbol(pa_handle, #x);                                          \
 213     if(!(p##x)) {                                                             \
 214         ret = ALC_FALSE;                                                      \
 215     }                                                                         \
 216 } while(0)
 217         LOAD_FUNC(pa_context_unref);
 218         LOAD_FUNC(pa_sample_spec_valid);
 219         LOAD_FUNC(pa_stream_drop);
 220         LOAD_FUNC(pa_frame_size);
 221         LOAD_FUNC(pa_strerror);
 222         LOAD_FUNC(pa_context_get_state);
 223         LOAD_FUNC(pa_stream_get_state);
 224         LOAD_FUNC(pa_threaded_mainloop_signal);
 225         LOAD_FUNC(pa_stream_peek);
 226         LOAD_FUNC(pa_threaded_mainloop_wait);
 227         LOAD_FUNC(pa_threaded_mainloop_unlock);
 228         LOAD_FUNC(pa_threaded_mainloop_in_thread);
 229         LOAD_FUNC(pa_context_new);
 230         LOAD_FUNC(pa_threaded_mainloop_stop);
 231         LOAD_FUNC(pa_context_disconnect);
 232         LOAD_FUNC(pa_threaded_mainloop_start);
 233         LOAD_FUNC(pa_threaded_mainloop_get_api);
 234         LOAD_FUNC(pa_context_set_state_callback);
 235         LOAD_FUNC(pa_stream_write);
 236         LOAD_FUNC(pa_xfree);
 237         LOAD_FUNC(pa_stream_connect_record);
 238         LOAD_FUNC(pa_stream_connect_playback);
 239         LOAD_FUNC(pa_stream_readable_size);
 240         LOAD_FUNC(pa_stream_writable_size);
 241         LOAD_FUNC(pa_stream_is_corked);
 242         LOAD_FUNC(pa_stream_cork);
 243         LOAD_FUNC(pa_stream_is_suspended);
 244         LOAD_FUNC(pa_stream_get_device_name);
 245         LOAD_FUNC(pa_stream_get_latency);
 246         LOAD_FUNC(pa_path_get_filename);
 247         LOAD_FUNC(pa_get_binary_name);
 248         LOAD_FUNC(pa_threaded_mainloop_free);
 249         LOAD_FUNC(pa_context_errno);
 250         LOAD_FUNC(pa_xmalloc);
 251         LOAD_FUNC(pa_stream_unref);
 252         LOAD_FUNC(pa_threaded_mainloop_accept);
 253         LOAD_FUNC(pa_stream_set_write_callback);
 254         LOAD_FUNC(pa_threaded_mainloop_new);
 255         LOAD_FUNC(pa_context_connect);
 256         LOAD_FUNC(pa_stream_set_buffer_attr);
 257         LOAD_FUNC(pa_stream_get_buffer_attr);
 258         LOAD_FUNC(pa_stream_get_sample_spec);
 259         LOAD_FUNC(pa_stream_get_time);
 260         LOAD_FUNC(pa_stream_set_read_callback);
 261         LOAD_FUNC(pa_stream_set_state_callback);
 262         LOAD_FUNC(pa_stream_set_moved_callback);
 263         LOAD_FUNC(pa_stream_set_underflow_callback);
 264         LOAD_FUNC(pa_stream_new_with_proplist);
 265         LOAD_FUNC(pa_stream_disconnect);
 266         LOAD_FUNC(pa_threaded_mainloop_lock);
 267         LOAD_FUNC(pa_channel_map_init_auto);
 268         LOAD_FUNC(pa_channel_map_parse);
 269         LOAD_FUNC(pa_channel_map_snprint);
 270         LOAD_FUNC(pa_channel_map_equal);
 271         LOAD_FUNC(pa_context_get_server_info);
 272         LOAD_FUNC(pa_context_get_sink_info_by_name);
 273         LOAD_FUNC(pa_context_get_sink_info_list);
 274         LOAD_FUNC(pa_context_get_source_info_by_name);
 275         LOAD_FUNC(pa_context_get_source_info_list);
 276         LOAD_FUNC(pa_operation_get_state);
 277         LOAD_FUNC(pa_operation_unref);
 278         LOAD_FUNC(pa_proplist_new);
 279         LOAD_FUNC(pa_proplist_free);
 280         LOAD_FUNC(pa_proplist_set);
 281 #undef LOAD_FUNC
 282 #define LOAD_OPTIONAL_FUNC(x) do {                                            \
 283     p##x = GetSymbol(pa_handle, #x);                                          \
 284 } while(0)
 285 #if PA_CHECK_VERSION(0,9,15)
 286         LOAD_OPTIONAL_FUNC(pa_channel_map_superset);
 287         LOAD_OPTIONAL_FUNC(pa_stream_set_buffer_attr_callback);
 288 #endif
 289 #if PA_CHECK_VERSION(0,9,16)
 290         LOAD_OPTIONAL_FUNC(pa_stream_begin_write);
 291 #endif
 292 #undef LOAD_OPTIONAL_FUNC
 293
 294         if(ret == ALC_FALSE)
 295         {
 296             CloseLib(pa_handle);
 297             pa_handle = NULL;
 298         }
 299     }
 300 #endif /* HAVE_DYNLOAD */
 301     return ret;
 302 }
 303
 304
 305 /* Global flags and properties */
 306 static pa_context_flags_t pulse_ctx_flags;
 307 static pa_proplist *prop_filter;
 308
 309
 310 /* PulseAudio Event Callbacks */
 311 static void context_state_callback(pa_context *context, void *pdata)
 312 {
 313     pa_threaded_mainloop *loop = pdata;
 314     pa_context_state_t state;
 315
 316     state = pa_context_get_state(context);
 317     if(state == PA_CONTEXT_READY || !PA_CONTEXT_IS_GOOD(state))
 318         pa_threaded_mainloop_signal(loop, 0);
 319 }
 320
 321 static void stream_state_callback(pa_stream *stream, void *pdata)
 322 {
 323     pa_threaded_mainloop *loop = pdata;
 324     pa_stream_state_t state;
 325
 326     state = pa_stream_get_state(stream);
 327     if(state == PA_STREAM_READY || !PA_STREAM_IS_GOOD(state))
 328         pa_threaded_mainloop_signal(loop, 0);
 329 }
 330
 331 static void stream_success_callback(pa_stream *UNUSED(stream), int UNUSED(success), void *pdata)
 332 {
 333     pa_threaded_mainloop *loop = pdata;
 334     pa_threaded_mainloop_signal(loop, 0);
 335 }
 336
 337 static void wait_for_operation(pa_operation *op, pa_threaded_mainloop *loop)
 338 {
 339     if(op)
 340     {
 341         while(pa_operation_get_state(op) == PA_OPERATION_RUNNING)
 342             pa_threaded_mainloop_wait(loop);
 343         pa_operation_unref(op);
 344     }
 345 }
 346
 347
 348 static pa_context *connect_context(pa_threaded_mainloop *loop, ALboolean silent)
 349 {
 350     const char *name = "OpenAL Soft";
 351     char path_name[PATH_MAX];
 352     pa_context_state_t state;
 353     pa_context *context;
 354     int err;
 355
 356     if(pa_get_binary_name(path_name, sizeof(path_name)))
 357         name = pa_path_get_filename(path_name);
 358
 359     context = pa_context_new(pa_threaded_mainloop_get_api(loop), name);
 360     if(!context)
 361     {
 362         ERR("pa_context_new() failed\n");
 363         return NULL;
 364     }
 365
 366     pa_context_set_state_callback(context, context_state_callback, loop);
 367
 368     if((err=pa_context_connect(context, NULL, pulse_ctx_flags, NULL)) >= 0)
 369     {
 370         while((state=pa_context_get_state(context)) != PA_CONTEXT_READY)
 371         {
 372             if(!PA_CONTEXT_IS_GOOD(state))
 373             {
 374                 err = pa_context_errno(context);
 375                 if(err > 0)  err = -err;
 376                 break;
 377             }
 378
 379             pa_threaded_mainloop_wait(loop);
 380         }
 381     }
 382     pa_context_set_state_callback(context, NULL, NULL);
 383
 384     if(err < 0)
 385     {
 386         if(!silent)
 387             ERR("Context did not connect: %s\n", pa_strerror(err));
 388         pa_context_unref(context);
 389         return NULL;
 390     }
 391
 392     return context;
 393 }
 394
 395
 396 static ALCboolean pulse_open(pa_threaded_mainloop **loop, pa_context **context,
 397                              void(*state_cb)(pa_context*,void*), void *ptr)
 398 {
 399     if(!(*loop = pa_threaded_mainloop_new()))
 400     {
 401         ERR("pa_threaded_mainloop_new() failed!\n");
 402         return ALC_FALSE;
 403     }
 404     if(pa_threaded_mainloop_start(*loop) < 0)
 405     {
 406         ERR("pa_threaded_mainloop_start() failed\n");
 407         goto error;
 408     }
 409
 410     pa_threaded_mainloop_lock(*loop);
 411
 412     *context = connect_context(*loop, AL_FALSE);
 413     if(!*context)
 414     {
 415         pa_threaded_mainloop_unlock(*loop);
 416         pa_threaded_mainloop_stop(*loop);
 417         goto error;
 418     }
 419     pa_context_set_state_callback(*context, state_cb, ptr);
 420
 421     pa_threaded_mainloop_unlock(*loop);
 422     return ALC_TRUE;
 423
 424 error:
 425     pa_threaded_mainloop_free(*loop);
 426     *loop = NULL;
 427
 428     return ALC_FALSE;
 429 }
 430
 431 static void pulse_close(pa_threaded_mainloop *loop, pa_context *context,
 432                         pa_stream *stream)
 433 {
 434     pa_threaded_mainloop_lock(loop);
 435
 436     if(stream)
 437     {
 438         pa_stream_set_moved_callback(stream, NULL, NULL);
 439 #if PA_CHECK_VERSION(0,9,15)
 440         if(pa_stream_set_buffer_attr_callback)
 441             pa_stream_set_buffer_attr_callback(stream, NULL, NULL);
 442 #endif
 443         pa_stream_disconnect(stream);
 444         pa_stream_unref(stream);
 445     }
 446
 447     pa_context_disconnect(context);
 448     pa_context_unref(context);
 449
 450     pa_threaded_mainloop_unlock(loop);
 451
 452     pa_threaded_mainloop_stop(loop);
 453     pa_threaded_mainloop_free(loop);
 454 }
 455
 456
 457 typedef struct {
 458     al_string name;
 459     al_string device_name;
 460 } DevMap;
 461 DECL_VECTOR(DevMap)
 462
 463 static vector_DevMap PlaybackDevices;
 464 static vector_DevMap CaptureDevices;
 465
 466 static void clear_devlist(vector_DevMap *list)
 467 {
 468     DevMap *iter, *end;
 469
 470     iter = VECTOR_ITER_BEGIN(*list);
 471     end = VECTOR_ITER_END(*list);
 472     for(;iter != end;iter++)
 473     {
 474         AL_STRING_DEINIT(iter->name);
 475         AL_STRING_DEINIT(iter->device_name);
 476     }
 477     VECTOR_RESIZE(*list, 0);
 478 }
 479
 480
 481 typedef struct ALCpulsePlayback {
 482     DERIVE_FROM_TYPE(ALCbackend);
 483
 484     al_string device_name;
 485
 486     pa_buffer_attr attr;
 487     pa_sample_spec spec;
 488
 489     pa_threaded_mainloop *loop;
 490
 491     pa_stream *stream;
 492     pa_context *context;
 493
 494     volatile ALboolean killNow;
 495     althrd_t thread;
 496 } ALCpulsePlayback;
 497
 498 static void ALCpulsePlayback_deviceCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 499 static void ALCpulsePlayback_probeDevices(void);
 500
 501 static void ALCpulsePlayback_bufferAttrCallback(pa_stream *stream, void *pdata);
 502 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata);
 503 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata);
 504 static void ALCpulsePlayback_sinkInfoCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 505 static void ALCpulsePlayback_sinkNameCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 506 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata);
 507 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name, pa_threaded_mainloop *loop,
 508                                                  pa_context *context, pa_stream_flags_t flags,
 509                                                  pa_buffer_attr *attr, pa_sample_spec *spec,
 510                                                  pa_channel_map *chanmap);
 511 static int ALCpulsePlayback_mixerProc(void *ptr);
 512
 513 static void ALCpulsePlayback_Construct(ALCpulsePlayback *self, ALCdevice *device);
 514 static void ALCpulsePlayback_Destruct(ALCpulsePlayback *self);
 515 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name);
 516 static void ALCpulsePlayback_close(ALCpulsePlayback *self);
 517 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self);
 518 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self);
 519 static void ALCpulsePlayback_stop(ALCpulsePlayback *self);
 520 static DECLARE_FORWARD2(ALCpulsePlayback, ALCbackend, ALCenum, captureSamples, ALCvoid*, ALCuint)
 521 static DECLARE_FORWARD(ALCpulsePlayback, ALCbackend, ALCuint, availableSamples)
 522 static ALint64 ALCpulsePlayback_getLatency(ALCpulsePlayback *self);
 523 static void ALCpulsePlayback_lock(ALCpulsePlayback *self);
 524 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self);
 525 DECLARE_DEFAULT_ALLOCATORS(ALCpulsePlayback)
 526
 527 DEFINE_ALCBACKEND_VTABLE(ALCpulsePlayback);
 528
 529
 530 static void ALCpulsePlayback_Construct(ALCpulsePlayback *self, ALCdevice *device)
 531 {
 532     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 533     SET_VTABLE2(ALCpulsePlayback, ALCbackend, self);
 534
 535     AL_STRING_INIT(self->device_name);
 536 }
 537
 538 static void ALCpulsePlayback_Destruct(ALCpulsePlayback *self)
 539 {
 540     AL_STRING_DEINIT(self->device_name);
 541     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
 542 }
 543
 544
 545 static void ALCpulsePlayback_deviceCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 546 {
 547     pa_threaded_mainloop *loop = pdata;
 548     const DevMap *iter, *end;
 549     DevMap entry;
 550
 551     if(eol)
 552     {
 553         pa_threaded_mainloop_signal(loop, 0);
 554         return;
 555     }
 556
 557     iter = VECTOR_ITER_BEGIN(PlaybackDevices);
 558     end = VECTOR_ITER_END(PlaybackDevices);
 559     for(;iter != end;iter++)
 560     {
 561         if(al_string_cmp_cstr(iter->device_name, info->name) == 0)
 562             return;
 563     }
 564
 565     TRACE("Got device \"%s\", \"%s\"\n", info->description, info->name);
 566
 567     AL_STRING_INIT(entry.name);
 568     AL_STRING_INIT(entry.device_name);
 569
 570     al_string_copy_cstr(&entry.name, info->description);
 571     al_string_copy_cstr(&entry.device_name, info->name);
 572
 573     VECTOR_PUSH_BACK(PlaybackDevices, entry);
 574 }
 575
 576 static void ALCpulsePlayback_probeDevices(void)
 577 {
 578     pa_threaded_mainloop *loop;
 579
 580     clear_devlist(&PlaybackDevices);
 581
 582     if((loop=pa_threaded_mainloop_new()) &&
 583        pa_threaded_mainloop_start(loop) >= 0)
 584     {
 585         pa_context *context;
 586
 587         pa_threaded_mainloop_lock(loop);
 588         context = connect_context(loop, AL_FALSE);
 589         if(context)
 590         {
 591             pa_operation *o;
 592             pa_stream_flags_t flags;
 593             pa_sample_spec spec;
 594             pa_stream *stream;
 595
 596             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 597                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
 598
 599             spec.format = PA_SAMPLE_S16NE;
 600             spec.rate = 44100;
 601             spec.channels = 2;
 602
 603             stream = ALCpulsePlayback_connectStream(NULL, loop, context, flags,
 604                                                     NULL, &spec, NULL);
 605             if(stream)
 606             {
 607                 o = pa_context_get_sink_info_by_name(context, pa_stream_get_device_name(stream),
 608                                                      ALCpulsePlayback_deviceCallback, loop);
 609                 wait_for_operation(o, loop);
 610
 611                 pa_stream_disconnect(stream);
 612                 pa_stream_unref(stream);
 613                 stream = NULL;
 614             }
 615
 616             o = pa_context_get_sink_info_list(context, ALCpulsePlayback_deviceCallback, loop);
 617             wait_for_operation(o, loop);
 618
 619             pa_context_disconnect(context);
 620             pa_context_unref(context);
 621         }
 622         pa_threaded_mainloop_unlock(loop);
 623         pa_threaded_mainloop_stop(loop);
 624     }
 625     if(loop)
 626         pa_threaded_mainloop_free(loop);
 627 }
 628
 629
 630 static void ALCpulsePlayback_bufferAttrCallback(pa_stream *stream, void *pdata)
 631 {
 632     ALCpulsePlayback *self = pdata;
 633
 634     self->attr = *pa_stream_get_buffer_attr(stream);
 635     TRACE("minreq=%d, tlength=%d, prebuf=%d\n", self->attr.minreq, self->attr.tlength, self->attr.prebuf);
 636 }
 637
 638 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata)
 639 {
 640     ALCpulsePlayback *self = pdata;
 641     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
 642     {
 643         ERR("Received context failure!\n");
 644         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 645     }
 646     pa_threaded_mainloop_signal(self->loop, 0);
 647 }
 648
 649 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata)
 650 {
 651     ALCpulsePlayback *self = pdata;
 652     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
 653     {
 654         ERR("Received stream failure!\n");
 655         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 656     }
 657     pa_threaded_mainloop_signal(self->loop, 0);
 658 }
 659
 660 static void ALCpulsePlayback_sinkInfoCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 661 {
 662     ALCpulsePlayback *self = pdata;
 663     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 664     char chanmap_str[256] = "";
 665     const struct {
 666         const char *str;
 667         enum DevFmtChannels chans;
 668     } chanmaps[] = {
 669         { "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right",
 670           DevFmtX71 },
 671         { "front-left,front-right,front-center,lfe,rear-center,side-left,side-right",
 672           DevFmtX61 },
 673         { "front-left,front-right,front-center,lfe,rear-left,rear-right",
 674           DevFmtX51 },
 675         { "front-left,front-right,front-center,lfe,side-left,side-right",
 676           DevFmtX51Side },
 677         { "front-left,front-right,rear-left,rear-right", DevFmtQuad },
 678         { "front-left,front-right", DevFmtStereo },
 679         { "mono", DevFmtMono },
 680         { NULL, 0 }
 681     };
 682     int i;
 683
 684     if(eol)
 685     {
 686         pa_threaded_mainloop_signal(self->loop, 0);
 687         return;
 688     }
 689
 690     for(i = 0;chanmaps[i].str;i++)
 691     {
 692         pa_channel_map map;
 693         if(!pa_channel_map_parse(&map, chanmaps[i].str))
 694             continue;
 695
 696         if(pa_channel_map_equal(&info->channel_map, &map)
 697 #if PA_CHECK_VERSION(0,9,15)
 698            || (pa_channel_map_superset &&
 699                pa_channel_map_superset(&info->channel_map, &map))
 700 #endif
 701             )
 702         {
 703             device->FmtChans = chanmaps[i].chans;
 704             return;
 705         }
 706     }
 707
 708     pa_channel_map_snprint(chanmap_str, sizeof(chanmap_str), &info->channel_map);
 709     ERR("Failed to find format for channel map:\n    %s\n", chanmap_str);
 710 }
 711
 712 static void ALCpulsePlayback_sinkNameCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 713 {
 714     ALCpulsePlayback *self = pdata;
 715     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 716
 717     if(eol)
 718     {
 719         pa_threaded_mainloop_signal(self->loop, 0);
 720         return;
 721     }
 722
 723     al_string_copy_cstr(&device->DeviceName, info->description);
 724 }
 725
 726
 727 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata)
 728 {
 729     ALCpulsePlayback *self = pdata;
 730
 731     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
 732
 733     TRACE("Stream moved to %s\n", al_string_get_cstr(self->device_name));
 734 }
 735
 736
 737 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name,
 738     pa_threaded_mainloop *loop, pa_context *context,
 739     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
 740     pa_channel_map *chanmap)
 741 {
 742     pa_stream_state_t state;
 743     pa_stream *stream;
 744
 745     stream = pa_stream_new_with_proplist(context, "Playback Stream", spec, chanmap, prop_filter);
 746     if(!stream)
 747     {
 748         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
 749         return NULL;
 750     }
 751
 752     pa_stream_set_state_callback(stream, stream_state_callback, loop);
 753
 754     if(pa_stream_connect_playback(stream, device_name, attr, flags, NULL, NULL) < 0)
 755     {
 756         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
 757         pa_stream_unref(stream);
 758         return NULL;
 759     }
 760
 761     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
 762     {
 763         if(!PA_STREAM_IS_GOOD(state))
 764         {
 765             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
 766             pa_stream_unref(stream);
 767             return NULL;
 768         }
 769
 770         pa_threaded_mainloop_wait(loop);
 771     }
 772     pa_stream_set_state_callback(stream, NULL, NULL);
 773
 774     return stream;
 775 }
 776
 777
 778 static int ALCpulsePlayback_mixerProc(void *ptr)
 779 {
 780     ALCpulsePlayback *self = ptr;
 781     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 782     ALuint buffer_size;
 783     ALint update_size;
 784     size_t frame_size;
 785     ssize_t len;
 786
 787     SetRTPriority();
 788     althrd_setname(althrd_current(), MIXER_THREAD_NAME);
 789
 790     pa_threaded_mainloop_lock(self->loop);
 791     frame_size = pa_frame_size(&self->spec);
 792     update_size = device->UpdateSize * frame_size;
 793
 794     /* Sanitize buffer metrics, in case we actually have less than what we
 795      * asked for. */
 796     buffer_size = minu(update_size*device->NumUpdates, self->attr.tlength);
 797     update_size = minu(update_size, buffer_size/2);
 798     do {
 799         len = pa_stream_writable_size(self->stream) - self->attr.tlength +
 800               buffer_size;
 801         if(len < update_size)
 802         {
 803             if(pa_stream_is_corked(self->stream) == 1)
 804             {
 805                 pa_operation *o;
 806                 o = pa_stream_cork(self->stream, 0, NULL, NULL);
 807                 if(o) pa_operation_unref(o);
 808             }
 809             pa_threaded_mainloop_unlock(self->loop);
 810             al_nssleep(0, 1000000);
 811             pa_threaded_mainloop_lock(self->loop);
 812             continue;
 813         }
 814         len -= len%update_size;
 815
 816         while(len > 0)
 817         {
 818             size_t newlen = len;
 819             void *buf;
 820             pa_free_cb_t free_func = NULL;
 821
 822 #if PA_CHECK_VERSION(0,9,16)
 823             if(!pa_stream_begin_write ||
 824                pa_stream_begin_write(self->stream, &buf, &newlen) < 0)
 825 #endif
 826             {
 827                 buf = pa_xmalloc(newlen);
 828                 free_func = pa_xfree;
 829             }
 830
 831             aluMixData(device, buf, newlen/frame_size);
 832
 833             pa_stream_write(self->stream, buf, newlen, free_func, 0, PA_SEEK_RELATIVE);
 834             len -= newlen;
 835         }
 836     } while(!self->killNow && device->Connected);
 837     pa_threaded_mainloop_unlock(self->loop);
 838
 839     return 0;
 840 }
 841
 842
 843 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name)
 844 {
 845     const char *pulse_name = NULL;
 846     pa_stream_flags_t flags;
 847     pa_sample_spec spec;
 848     pa_operation *o;
 849
 850     if(name)
 851     {
 852         const DevMap *iter, *end;
 853
 854         if(VECTOR_SIZE(PlaybackDevices) == 0)
 855             ALCpulsePlayback_probeDevices();
 856
 857         iter = VECTOR_ITER_BEGIN(PlaybackDevices);
 858         end = VECTOR_ITER_END(PlaybackDevices);
 859         for(;iter != end;iter++)
 860         {
 861             if(al_string_cmp_cstr(iter->name, name) == 0)
 862             {
 863                 pulse_name = al_string_get_cstr(iter->device_name);
 864                 break;
 865             }
 866         }
 867         if(iter == end)
 868             return ALC_INVALID_VALUE;
 869     }
 870
 871     if(!pulse_open(&self->loop, &self->context, ALCpulsePlayback_contextStateCallback, self))
 872         return ALC_INVALID_VALUE;
 873
 874     pa_threaded_mainloop_lock(self->loop);
 875
 876     flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 877             PA_STREAM_FIX_CHANNELS;
 878     if(!GetConfigValueBool("pulse", "allow-moves", 0))
 879         flags |= PA_STREAM_DONT_MOVE;
 880
 881     spec.format = PA_SAMPLE_S16NE;
 882     spec.rate = 44100;
 883     spec.channels = 2;
 884
 885     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
 886     self->stream = ALCpulsePlayback_connectStream(pulse_name, self->loop, self->context,
 887                                                   flags, NULL, &spec, NULL);
 888     if(!self->stream)
 889     {
 890         pa_threaded_mainloop_unlock(self->loop);
 891         pulse_close(self->loop, self->context, self->stream);
 892         self->loop = NULL;
 893         self->context = NULL;
 894         return ALC_INVALID_VALUE;
 895     }
 896     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
 897
 898     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
 899     o = pa_context_get_sink_info_by_name(self->context,
 900                                          al_string_get_cstr(self->device_name),
 901                                          ALCpulsePlayback_sinkNameCallback, self);
 902     wait_for_operation(o, self->loop);
 903
 904     pa_threaded_mainloop_unlock(self->loop);
 905
 906     return ALC_NO_ERROR;
 907 }
 908
 909 static void ALCpulsePlayback_close(ALCpulsePlayback *self)
 910 {
 911     pulse_close(self->loop, self->context, self->stream);
 912     self->loop = NULL;
 913     self->context = NULL;
 914     self->stream = NULL;
 915
 916     al_string_clear(&self->device_name);
 917 }
 918
 919 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self)
 920 {
 921     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 922     pa_stream_flags_t flags = 0;
 923     const char *mapname = NULL;
 924     pa_channel_map chanmap;
 925     ALuint len;
 926
 927     pa_threaded_mainloop_lock(self->loop);
 928
 929     if(self->stream)
 930     {
 931         pa_stream_set_moved_callback(self->stream, NULL, NULL);
 932 #if PA_CHECK_VERSION(0,9,15)
 933         if(pa_stream_set_buffer_attr_callback)
 934             pa_stream_set_buffer_attr_callback(self->stream, NULL, NULL);
 935 #endif
 936         pa_stream_disconnect(self->stream);
 937         pa_stream_unref(self->stream);
 938         self->stream = NULL;
 939     }
 940
 941     if(!(device->Flags&DEVICE_CHANNELS_REQUEST))
 942     {
 943         pa_operation *o;
 944         o = pa_context_get_sink_info_by_name(self->context,
 945                                              al_string_get_cstr(self->device_name),
 946                                              ALCpulsePlayback_sinkInfoCallback, self);
 947         wait_for_operation(o, self->loop);
 948     }
 949     if(!(device->Flags&DEVICE_FREQUENCY_REQUEST))
 950         flags |= PA_STREAM_FIX_RATE;
 951
 952     flags |= PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
 953     flags |= PA_STREAM_ADJUST_LATENCY;
 954     flags |= PA_STREAM_START_CORKED;
 955     if(!GetConfigValueBool("pulse", "allow-moves", 0))
 956         flags |= PA_STREAM_DONT_MOVE;
 957
 958     switch(device->FmtType)
 959     {
 960         case DevFmtByte:
 961             device->FmtType = DevFmtUByte;
 962             /* fall-through */
 963         case DevFmtUByte:
 964             self->spec.format = PA_SAMPLE_U8;
 965             break;
 966         case DevFmtUShort:
 967             device->FmtType = DevFmtShort;
 968             /* fall-through */
 969         case DevFmtShort:
 970             self->spec.format = PA_SAMPLE_S16NE;
 971             break;
 972         case DevFmtUInt:
 973             device->FmtType = DevFmtInt;
 974             /* fall-through */
 975         case DevFmtInt:
 976             self->spec.format = PA_SAMPLE_S32NE;
 977             break;
 978         case DevFmtFloat:
 979             self->spec.format = PA_SAMPLE_FLOAT32NE;
 980             break;
 981     }
 982     self->spec.rate = device->Frequency;
 983     self->spec.channels = ChannelsFromDevFmt(device->FmtChans);
 984
 985     if(pa_sample_spec_valid(&self->spec) == 0)
 986     {
 987         ERR("Invalid sample format\n");
 988         pa_threaded_mainloop_unlock(self->loop);
 989         return ALC_FALSE;
 990     }
 991
 992     switch(device->FmtChans)
 993     {
 994         case DevFmtMono:
 995             mapname = "mono";
 996             break;
 997         case DevFmtStereo:
 998             mapname = "front-left,front-right";
 999             break;
1000         case DevFmtQuad:
1001             mapname = "front-left,front-right,rear-left,rear-right";
1002             break;
1003         case DevFmtX51:
1004             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right";
1005             break;
1006         case DevFmtX51Side:
1007             mapname = "front-left,front-right,front-center,lfe,side-left,side-right";
1008             break;
1009         case DevFmtX61:
1010             mapname = "front-left,front-right,front-center,lfe,rear-center,side-left,side-right";
1011             break;
1012         case DevFmtX71:
1013             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right";
1014             break;
1015     }
1016     if(!pa_channel_map_parse(&chanmap, mapname))
1017     {
1018         ERR("Failed to build channel map for %s\n", DevFmtChannelsString(device->FmtChans));
1019         pa_threaded_mainloop_unlock(self->loop);
1020         return ALC_FALSE;
1021     }
1022     SetDefaultWFXChannelOrder(device);
1023
1024     self->attr.fragsize = -1;
1025     self->attr.prebuf = 0;
1026     self->attr.minreq = device->UpdateSize * pa_frame_size(&self->spec);
1027     self->attr.tlength = self->attr.minreq * maxu(device->NumUpdates, 2);
1028     self->attr.maxlength = -1;
1029
1030     self->stream = ALCpulsePlayback_connectStream(al_string_get_cstr(self->device_name),
1031                                                   self->loop, self->context, flags,
1032                                                   &self->attr, &self->spec, &chanmap);
1033     if(!self->stream)
1034     {
1035         pa_threaded_mainloop_unlock(self->loop);
1036         return ALC_FALSE;
1037     }
1038     pa_stream_set_state_callback(self->stream, ALCpulsePlayback_streamStateCallback, self);
1039     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
1040
1041     self->spec = *(pa_stream_get_sample_spec(self->stream));
1042     if(device->Frequency != self->spec.rate)
1043     {
1044         pa_operation *o;
1045
1046         /* Server updated our playback rate, so modify the buffer attribs
1047          * accordingly. */
1048         device->NumUpdates = (ALuint)((ALdouble)device->NumUpdates / device->Frequency *
1049                                       self->spec.rate + 0.5);
1050         self->attr.minreq  = device->UpdateSize * pa_frame_size(&self->spec);
1051         self->attr.tlength = self->attr.minreq * clampu(device->NumUpdates, 2, 16);
1052         self->attr.maxlength = -1;
1053         self->attr.prebuf  = 0;
1054
1055         o = pa_stream_set_buffer_attr(self->stream, &self->attr,
1056                                       stream_success_callback, self->loop);
1057         wait_for_operation(o, self->loop);
1058
1059         device->Frequency = self->spec.rate;
1060     }
1061
1062 #if PA_CHECK_VERSION(0,9,15)
1063     if(pa_stream_set_buffer_attr_callback)
1064         pa_stream_set_buffer_attr_callback(self->stream, ALCpulsePlayback_bufferAttrCallback, self);
1065 #endif
1066     ALCpulsePlayback_bufferAttrCallback(self->stream, self);
1067
1068     len = self->attr.minreq / pa_frame_size(&self->spec);
1069     if((CPUCapFlags&CPU_CAP_SSE))
1070         len = (len+3)&~3;
1071     device->NumUpdates = (ALuint)((ALdouble)device->NumUpdates/len*device->UpdateSize + 0.5);
1072     device->NumUpdates = clampu(device->NumUpdates, 2, 16);
1073     device->UpdateSize = len;
1074
1075     pa_threaded_mainloop_unlock(self->loop);
1076     return ALC_TRUE;
1077 }
1078
1079 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self)
1080 {
1081     self->killNow = AL_FALSE;
1082     if(althrd_create(&self->thread, ALCpulsePlayback_mixerProc, self) != althrd_success)
1083         return ALC_FALSE;
1084     return ALC_TRUE;
1085 }
1086
1087 static void ALCpulsePlayback_stop(ALCpulsePlayback *self)
1088 {
1089     pa_operation *o;
1090     int res;
1091
1092     if(!self->stream)
1093         return;
1094
1095     self->killNow = AL_TRUE;
1096     althrd_join(self->thread, &res);
1097
1098     pa_threaded_mainloop_lock(self->loop);
1099
1100     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1101     wait_for_operation(o, self->loop);
1102
1103     pa_threaded_mainloop_unlock(self->loop);
1104 }
1105
1106
1107 static ALint64 ALCpulsePlayback_getLatency(ALCpulsePlayback *self)
1108 {
1109     pa_usec_t latency = 0;
1110     int neg, err;
1111
1112     if((err=pa_stream_get_latency(self->stream, &latency, &neg)) != 0)
1113     {
1114         /* FIXME: if err = -PA_ERR_NODATA, it means we were called too soon
1115          * after starting the stream and no timing info has been received from
1116          * the server yet. Should we wait, possibly stalling the app, or give a
1117          * dummy value? Either way, it shouldn't be 0. */
1118         if(err != -PA_ERR_NODATA)
1119             ERR("Failed to get stream latency: 0x%x\n", err);
1120         return 0;
1121     }
1122
1123     if(neg) latency = 0;
1124     return (ALint64)minu64(latency, U64(0x7fffffffffffffff)/1000) * 1000;
1125 }
1126
1127
1128 static void ALCpulsePlayback_lock(ALCpulsePlayback *self)
1129 {
1130     pa_threaded_mainloop_lock(self->loop);
1131 }
1132
1133 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self)
1134 {
1135     pa_threaded_mainloop_unlock(self->loop);
1136 }
1137
1138
1139 typedef struct ALCpulseCapture {
1140     DERIVE_FROM_TYPE(ALCbackend);
1141
1142     al_string device_name;
1143
1144     const void *cap_store;
1145     size_t cap_len;
1146     size_t cap_remain;
1147
1148     ALCuint last_readable;
1149
1150     pa_buffer_attr attr;
1151     pa_sample_spec spec;
1152
1153     pa_threaded_mainloop *loop;
1154
1155     pa_stream *stream;
1156     pa_context *context;
1157 } ALCpulseCapture;
1158
1159 static void ALCpulseCapture_deviceCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1160 static void ALCpulseCapture_probeDevices(void);
1161
1162 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata);
1163 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata);
1164 static void ALCpulseCapture_sourceNameCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1165 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata);
1166 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1167                                                 pa_threaded_mainloop *loop, pa_context *context,
1168                                                 pa_stream_flags_t flags, pa_buffer_attr *attr,
1169                                                 pa_sample_spec *spec, pa_channel_map *chanmap);
1170
1171 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device);
1172 static void ALCpulseCapture_Destruct(ALCpulseCapture *self);
1173 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name);
1174 static void ALCpulseCapture_close(ALCpulseCapture *self);
1175 static DECLARE_FORWARD(ALCpulseCapture, ALCbackend, ALCboolean, reset)
1176 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self);
1177 static void ALCpulseCapture_stop(ALCpulseCapture *self);
1178 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples);
1179 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self);
1180 static ALint64 ALCpulseCapture_getLatency(ALCpulseCapture *self);
1181 static void ALCpulseCapture_lock(ALCpulseCapture *self);
1182 static void ALCpulseCapture_unlock(ALCpulseCapture *self);
1183 DECLARE_DEFAULT_ALLOCATORS(ALCpulseCapture)
1184
1185 DEFINE_ALCBACKEND_VTABLE(ALCpulseCapture);
1186
1187
1188 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device)
1189 {
1190     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
1191     SET_VTABLE2(ALCpulseCapture, ALCbackend, self);
1192
1193     AL_STRING_INIT(self->device_name);
1194 }
1195
1196 static void ALCpulseCapture_Destruct(ALCpulseCapture *self)
1197 {
1198     AL_STRING_DEINIT(self->device_name);
1199     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
1200 }
1201
1202
1203 static void ALCpulseCapture_deviceCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1204 {
1205     pa_threaded_mainloop *loop = pdata;
1206     const DevMap *iter, *end;
1207     DevMap entry;
1208
1209     if(eol)
1210     {
1211         pa_threaded_mainloop_signal(loop, 0);
1212         return;
1213     }
1214
1215     iter = VECTOR_ITER_BEGIN(CaptureDevices);
1216     end = VECTOR_ITER_END(CaptureDevices);
1217     for(;iter != end;iter++)
1218     {
1219         if(al_string_cmp_cstr(iter->device_name, info->name) == 0)
1220             return;
1221     }
1222
1223     TRACE("Got device \"%s\", \"%s\"\n", info->description, info->name);
1224
1225     AL_STRING_INIT(entry.name);
1226     AL_STRING_INIT(entry.device_name);
1227
1228     al_string_copy_cstr(&entry.name, info->description);
1229     al_string_copy_cstr(&entry.device_name, info->name);
1230
1231     VECTOR_PUSH_BACK(CaptureDevices, entry);
1232 }
1233
1234 static void ALCpulseCapture_probeDevices(void)
1235 {
1236     pa_threaded_mainloop *loop;
1237
1238     clear_devlist(&CaptureDevices);
1239
1240     if((loop=pa_threaded_mainloop_new()) &&
1241        pa_threaded_mainloop_start(loop) >= 0)
1242     {
1243         pa_context *context;
1244
1245         pa_threaded_mainloop_lock(loop);
1246         context = connect_context(loop, AL_FALSE);
1247         if(context)
1248         {
1249             pa_operation *o;
1250             pa_stream_flags_t flags;
1251             pa_sample_spec spec;
1252             pa_stream *stream;
1253
1254             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
1255                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
1256
1257             spec.format = PA_SAMPLE_S16NE;
1258             spec.rate = 44100;
1259             spec.channels = 1;
1260
1261             stream = ALCpulseCapture_connectStream(NULL, loop, context, flags,
1262                                                    NULL, &spec, NULL);
1263             if(stream)
1264             {
1265                 o = pa_context_get_source_info_by_name(context, pa_stream_get_device_name(stream),
1266                                                        ALCpulseCapture_deviceCallback, loop);
1267                 wait_for_operation(o, loop);
1268
1269                 pa_stream_disconnect(stream);
1270                 pa_stream_unref(stream);
1271                 stream = NULL;
1272             }
1273
1274             o = pa_context_get_source_info_list(context, ALCpulseCapture_deviceCallback, loop);
1275             wait_for_operation(o, loop);
1276
1277             pa_context_disconnect(context);
1278             pa_context_unref(context);
1279         }
1280         pa_threaded_mainloop_unlock(loop);
1281         pa_threaded_mainloop_stop(loop);
1282     }
1283     if(loop)
1284         pa_threaded_mainloop_free(loop);
1285 }
1286
1287
1288 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata)
1289 {
1290     ALCpulseCapture *self = pdata;
1291     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
1292     {
1293         ERR("Received context failure!\n");
1294         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1295     }
1296     pa_threaded_mainloop_signal(self->loop, 0);
1297 }
1298
1299 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata)
1300 {
1301     ALCpulseCapture *self = pdata;
1302     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
1303     {
1304         ERR("Received stream failure!\n");
1305         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1306     }
1307     pa_threaded_mainloop_signal(self->loop, 0);
1308 }
1309
1310
1311 static void ALCpulseCapture_sourceNameCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1312 {
1313     ALCpulseCapture *self = pdata;
1314     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1315
1316     if(eol)
1317     {
1318         pa_threaded_mainloop_signal(self->loop, 0);
1319         return;
1320     }
1321
1322     al_string_copy_cstr(&device->DeviceName, info->description);
1323 }
1324
1325
1326 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata)
1327 {
1328     ALCpulseCapture *self = pdata;
1329
1330     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
1331
1332     TRACE("Stream moved to %s\n", al_string_get_cstr(self->device_name));
1333 }
1334
1335
1336 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1337     pa_threaded_mainloop *loop, pa_context *context,
1338     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
1339     pa_channel_map *chanmap)
1340 {
1341     pa_stream_state_t state;
1342     pa_stream *stream;
1343
1344     stream = pa_stream_new_with_proplist(context, "Capture Stream", spec, chanmap, prop_filter);
1345     if(!stream)
1346     {
1347         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
1348         return NULL;
1349     }
1350
1351     pa_stream_set_state_callback(stream, stream_state_callback, loop);
1352
1353     if(pa_stream_connect_record(stream, device_name, attr, flags) < 0)
1354     {
1355         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
1356         pa_stream_unref(stream);
1357         return NULL;
1358     }
1359
1360     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
1361     {
1362         if(!PA_STREAM_IS_GOOD(state))
1363         {
1364             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
1365             pa_stream_unref(stream);
1366             return NULL;
1367         }
1368
1369         pa_threaded_mainloop_wait(loop);
1370     }
1371     pa_stream_set_state_callback(stream, NULL, NULL);
1372
1373     return stream;
1374 }
1375
1376
1377 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name)
1378 {
1379     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1380     const char *pulse_name = NULL;
1381     pa_stream_flags_t flags = 0;
1382     pa_channel_map chanmap;
1383     pa_operation *o;
1384     ALuint samples;
1385
1386     if(name)
1387     {
1388         const DevMap *iter, *end;
1389
1390         if(VECTOR_SIZE(CaptureDevices) == 0)
1391             ALCpulseCapture_probeDevices();
1392
1393         iter = VECTOR_ITER_BEGIN(CaptureDevices);
1394         end = VECTOR_ITER_END(CaptureDevices);
1395         for(;iter != end;iter++)
1396         {
1397             if(al_string_cmp_cstr(iter->name, name) == 0)
1398             {
1399                 pulse_name = al_string_get_cstr(iter->device_name);
1400                 break;
1401             }
1402         }
1403         if(iter == end)
1404             return ALC_INVALID_VALUE;
1405     }
1406
1407     if(!pulse_open(&self->loop, &self->context, ALCpulseCapture_contextStateCallback, self))
1408         return ALC_INVALID_VALUE;
1409
1410     pa_threaded_mainloop_lock(self->loop);
1411
1412     self->spec.rate = device->Frequency;
1413     self->spec.channels = ChannelsFromDevFmt(device->FmtChans);
1414
1415     switch(device->FmtType)
1416     {
1417         case DevFmtUByte:
1418             self->spec.format = PA_SAMPLE_U8;
1419             break;
1420         case DevFmtShort:
1421             self->spec.format = PA_SAMPLE_S16NE;
1422             break;
1423         case DevFmtInt:
1424             self->spec.format = PA_SAMPLE_S32NE;
1425             break;
1426         case DevFmtFloat:
1427             self->spec.format = PA_SAMPLE_FLOAT32NE;
1428             break;
1429         case DevFmtByte:
1430         case DevFmtUShort:
1431         case DevFmtUInt:
1432             ERR("%s capture samples not supported\n", DevFmtTypeString(device->FmtType));
1433             pa_threaded_mainloop_unlock(self->loop);
1434             goto fail;
1435     }
1436
1437     if(pa_sample_spec_valid(&self->spec) == 0)
1438     {
1439         ERR("Invalid sample format\n");
1440         pa_threaded_mainloop_unlock(self->loop);
1441         goto fail;
1442     }
1443
1444     if(!pa_channel_map_init_auto(&chanmap, self->spec.channels, PA_CHANNEL_MAP_WAVEEX))
1445     {
1446         ERR("Couldn't build map for channel count (%d)!\n", self->spec.channels);
1447         pa_threaded_mainloop_unlock(self->loop);
1448         goto fail;
1449     }
1450
1451     samples = device->UpdateSize * device->NumUpdates;
1452     samples = maxu(samples, 100 * device->Frequency / 1000);
1453
1454     self->attr.minreq = -1;
1455     self->attr.prebuf = -1;
1456     self->attr.maxlength = samples * pa_frame_size(&self->spec);
1457     self->attr.tlength = -1;
1458     self->attr.fragsize = minu(samples, 50*device->Frequency/1000) *
1459                           pa_frame_size(&self->spec);
1460
1461     flags |= PA_STREAM_START_CORKED|PA_STREAM_ADJUST_LATENCY;
1462     if(!GetConfigValueBool("pulse", "allow-moves", 0))
1463         flags |= PA_STREAM_DONT_MOVE;
1464
1465     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
1466     self->stream = ALCpulseCapture_connectStream(pulse_name, self->loop, self->context,
1467                                                  flags, &self->attr, &self->spec,
1468                                                  &chanmap);
1469     if(!self->stream)
1470     {
1471         pa_threaded_mainloop_unlock(self->loop);
1472         goto fail;
1473     }
1474     pa_stream_set_moved_callback(self->stream, ALCpulseCapture_streamMovedCallback, self);
1475     pa_stream_set_state_callback(self->stream, ALCpulseCapture_streamStateCallback, self);
1476
1477     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
1478     o = pa_context_get_source_info_by_name(self->context,
1479                                            al_string_get_cstr(self->device_name),
1480                                            ALCpulseCapture_sourceNameCallback, self);
1481     wait_for_operation(o, self->loop);
1482
1483     pa_threaded_mainloop_unlock(self->loop);
1484     return ALC_NO_ERROR;
1485
1486 fail:
1487     pulse_close(self->loop, self->context, self->stream);
1488     self->loop = NULL;
1489     self->context = NULL;
1490     self->stream = NULL;
1491
1492     return ALC_INVALID_VALUE;
1493 }
1494
1495 static void ALCpulseCapture_close(ALCpulseCapture *self)
1496 {
1497     pulse_close(self->loop, self->context, self->stream);
1498     self->loop = NULL;
1499     self->context = NULL;
1500     self->stream = NULL;
1501
1502     al_string_clear(&self->device_name);
1503 }
1504
1505 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self)
1506 {
1507     pa_operation *o;
1508     o = pa_stream_cork(self->stream, 0, stream_success_callback, self->loop);
1509     wait_for_operation(o, self->loop);
1510
1511     return ALC_TRUE;
1512 }
1513
1514 static void ALCpulseCapture_stop(ALCpulseCapture *self)
1515 {
1516     pa_operation *o;
1517     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1518     wait_for_operation(o, self->loop);
1519 }
1520
1521 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples)
1522 {
1523     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1524     ALCuint todo = samples * pa_frame_size(&self->spec);
1525
1526     /* Capture is done in fragment-sized chunks, so we loop until we get all
1527      * that's available */
1528     self->last_readable -= todo;
1529     while(todo > 0)
1530     {
1531         size_t rem = todo;
1532
1533         if(self->cap_len == 0)
1534         {
1535             pa_stream_state_t state;
1536
1537             state = pa_stream_get_state(self->stream);
1538             if(!PA_STREAM_IS_GOOD(state))
1539             {
1540                 aluHandleDisconnect(device);
1541                 break;
1542             }
1543             if(pa_stream_peek(self->stream, &self->cap_store, &self->cap_len) < 0)
1544             {
1545                 ERR("pa_stream_peek() failed: %s\n",
1546                     pa_strerror(pa_context_errno(self->context)));
1547                 aluHandleDisconnect(device);
1548                 break;
1549             }
1550             self->cap_remain = self->cap_len;
1551         }
1552         if(rem > self->cap_remain)
1553             rem = self->cap_remain;
1554
1555         memcpy(buffer, self->cap_store, rem);
1556
1557         buffer = (ALbyte*)buffer + rem;
1558         todo -= rem;
1559
1560         self->cap_store = (ALbyte*)self->cap_store + rem;
1561         self->cap_remain -= rem;
1562         if(self->cap_remain == 0)
1563         {
1564             pa_stream_drop(self->stream);
1565             self->cap_len = 0;
1566         }
1567     }
1568     if(todo > 0)
1569         memset(buffer, ((device->FmtType==DevFmtUByte) ? 0x80 : 0), todo);
1570
1571     return ALC_NO_ERROR;
1572 }
1573
1574 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self)
1575 {
1576     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1577     size_t readable = self->cap_remain;
1578
1579     if(device->Connected)
1580     {
1581         ssize_t got = pa_stream_readable_size(self->stream);
1582         if(got < 0)
1583         {
1584             ERR("pa_stream_readable_size() failed: %s\n", pa_strerror(got));
1585             aluHandleDisconnect(device);
1586         }
1587         else if((size_t)got > self->cap_len)
1588             readable += got - self->cap_len;
1589     }
1590
1591     if(self->last_readable < readable)
1592         self->last_readable = readable;
1593     return self->last_readable / pa_frame_size(&self->spec);
1594 }
1595
1596
1597 static ALint64 ALCpulseCapture_getLatency(ALCpulseCapture *self)
1598 {
1599     pa_usec_t latency = 0;
1600     int neg;
1601
1602     if(pa_stream_get_latency(self->stream, &latency, &neg) != 0)
1603     {
1604         ERR("Failed to get stream latency!\n");
1605         return 0;
1606     }
1607
1608     if(neg) latency = 0;
1609     return (ALint64)minu64(latency, U64(0x7fffffffffffffff)/1000) * 1000;
1610 }
1611
1612
1613 static void ALCpulseCapture_lock(ALCpulseCapture *self)
1614 {
1615     pa_threaded_mainloop_lock(self->loop);
1616 }
1617
1618 static void ALCpulseCapture_unlock(ALCpulseCapture *self)
1619 {
1620     pa_threaded_mainloop_unlock(self->loop);
1621 }
1622
1623
1624 static inline void AppendAllDevicesList2(const DevMap *entry)
1625 { AppendAllDevicesList(al_string_get_cstr(entry->name)); }
1626 static inline void AppendCaptureDeviceList2(const DevMap *entry)
1627 { AppendCaptureDeviceList(al_string_get_cstr(entry->name)); }
1628
1629 typedef struct ALCpulseBackendFactory {
1630     DERIVE_FROM_TYPE(ALCbackendFactory);
1631 } ALCpulseBackendFactory;
1632 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1633
1634 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory *self);
1635 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory *self);
1636 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory *self, ALCbackend_Type type);
1637 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory *self, enum DevProbe type);
1638 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
1639
1640 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1641
1642
1643 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1644 {
1645     ALCboolean ret = ALC_FALSE;
1646
1647     VECTOR_INIT(PlaybackDevices);
1648     VECTOR_INIT(CaptureDevices);
1649
1650     if(pulse_load())
1651     {
1652         pa_threaded_mainloop *loop;
1653
1654         pulse_ctx_flags = 0;
1655         if(!GetConfigValueBool("pulse", "spawn-server", 1))
1656             pulse_ctx_flags |= PA_CONTEXT_NOAUTOSPAWN;
1657
1658         if((loop=pa_threaded_mainloop_new()) &&
1659            pa_threaded_mainloop_start(loop) >= 0)
1660         {
1661             pa_context *context;
1662
1663             pa_threaded_mainloop_lock(loop);
1664             context = connect_context(loop, AL_TRUE);
1665             if(context)
1666             {
1667                 ret = ALC_TRUE;
1668
1669                 /* Some libraries (Phonon, Qt) set some pulseaudio properties
1670                  * through environment variables, which causes all streams in
1671                  * the process to inherit them. This attempts to filter those
1672                  * properties out by setting them to 0-length data. */
1673                 prop_filter = pa_proplist_new();
1674                 pa_proplist_set(prop_filter, PA_PROP_MEDIA_ROLE, NULL, 0);
1675                 pa_proplist_set(prop_filter, "phonon.streamid", NULL, 0);
1676
1677                 pa_context_disconnect(context);
1678                 pa_context_unref(context);
1679             }
1680             pa_threaded_mainloop_unlock(loop);
1681             pa_threaded_mainloop_stop(loop);
1682         }
1683         if(loop)
1684             pa_threaded_mainloop_free(loop);
1685     }
1686
1687     return ret;
1688 }
1689
1690 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1691 {
1692     clear_devlist(&PlaybackDevices);
1693     VECTOR_DEINIT(PlaybackDevices);
1694
1695     clear_devlist(&CaptureDevices);
1696     VECTOR_DEINIT(CaptureDevices);
1697
1698     if(prop_filter)
1699         pa_proplist_free(prop_filter);
1700     prop_filter = NULL;
1701
1702     /* PulseAudio doesn't like being CloseLib'd sometimes */
1703 }
1704
1705 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type type)
1706 {
1707     if(type == ALCbackend_Playback || type == ALCbackend_Capture)
1708         return ALC_TRUE;
1709     return ALC_FALSE;
1710 }
1711
1712 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe type)
1713 {
1714     switch(type)
1715     {
1716         case ALL_DEVICE_PROBE:
1717             ALCpulsePlayback_probeDevices();
1718             VECTOR_FOR_EACH(const DevMap, PlaybackDevices, AppendAllDevicesList2);
1719             break;
1720
1721         case CAPTURE_DEVICE_PROBE:
1722             ALCpulseCapture_probeDevices();
1723             VECTOR_FOR_EACH(const DevMap, CaptureDevices, AppendCaptureDeviceList2);
1724             break;
1725     }
1726 }
1727
1728 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
1729 {
1730     if(type == ALCbackend_Playback)
1731     {
1732         ALCpulsePlayback *backend;
1733
1734         backend = ALCpulsePlayback_New(sizeof(*backend));
1735         if(!backend) return NULL;
1736         memset(backend, 0, sizeof(*backend));
1737
1738         ALCpulsePlayback_Construct(backend, device);
1739
1740         return STATIC_CAST(ALCbackend, backend);
1741     }
1742     if(type == ALCbackend_Capture)
1743     {
1744         ALCpulseCapture *backend;
1745
1746         backend = ALCpulseCapture_New(sizeof(*backend));
1747         if(!backend) return NULL;
1748         memset(backend, 0, sizeof(*backend));
1749
1750         ALCpulseCapture_Construct(backend, device);
1751
1752         return STATIC_CAST(ALCbackend, backend);
1753     }
1754
1755     return NULL;
1756 }
1757
1758
1759 #else /* PA_API_VERSION == 12 */
1760
1761 #warning "Unsupported API version, backend will be unavailable!"
1762
1763 typedef struct ALCpulseBackendFactory {
1764     DERIVE_FROM_TYPE(ALCbackendFactory);
1765 } ALCpulseBackendFactory;
1766 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1767
1768 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1769 {
1770     return ALC_FALSE;
1771 }
1772
1773 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1774 {
1775 }
1776
1777 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type UNUSED(type))
1778 {
1779     return ALC_FALSE;
1780 }
1781
1782 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe UNUSED(type))
1783 {
1784 }
1785
1786 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice* UNUSED(device), ALCbackend_Type UNUSED(type))
1787 {
1788     return NULL;
1789 }
1790
1791 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1792
1793 #endif /* PA_API_VERSION == 12 */
1794
1795 ALCbackendFactory *ALCpulseBackendFactory_getFactory(void)
1796 {
1797     static ALCpulseBackendFactory factory = ALCPULSEBACKENDFACTORY_INITIALIZER;
1798     return STATIC_CAST(ALCbackendFactory, &factory);
1799 }