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 #ifdef _WIN32
 186 #define PALIB "libpulse-0.dll"
 187 #elif defined(__APPLE__) && defined(__MACH__)
 188 #define PALIB "libpulse.0.dylib"
 189 #else
 190 #define PALIB "libpulse.so.0"
 191 #endif
 192         pa_handle = LoadLib(PALIB);
 193         if(!pa_handle)
 194             return ALC_FALSE;
 195
 196 #define LOAD_FUNC(x) do {                                                     \
 197     p##x = GetSymbol(pa_handle, #x);                                          \
 198     if(!(p##x)) {                                                             \
 199         ret = ALC_FALSE;                                                      \
 200     }                                                                         \
 201 } while(0)
 202         LOAD_FUNC(pa_context_unref);
 203         LOAD_FUNC(pa_sample_spec_valid);
 204         LOAD_FUNC(pa_stream_drop);
 205         LOAD_FUNC(pa_frame_size);
 206         LOAD_FUNC(pa_strerror);
 207         LOAD_FUNC(pa_context_get_state);
 208         LOAD_FUNC(pa_stream_get_state);
 209         LOAD_FUNC(pa_threaded_mainloop_signal);
 210         LOAD_FUNC(pa_stream_peek);
 211         LOAD_FUNC(pa_threaded_mainloop_wait);
 212         LOAD_FUNC(pa_threaded_mainloop_unlock);
 213         LOAD_FUNC(pa_threaded_mainloop_in_thread);
 214         LOAD_FUNC(pa_context_new);
 215         LOAD_FUNC(pa_threaded_mainloop_stop);
 216         LOAD_FUNC(pa_context_disconnect);
 217         LOAD_FUNC(pa_threaded_mainloop_start);
 218         LOAD_FUNC(pa_threaded_mainloop_get_api);
 219         LOAD_FUNC(pa_context_set_state_callback);
 220         LOAD_FUNC(pa_stream_write);
 221         LOAD_FUNC(pa_xfree);
 222         LOAD_FUNC(pa_stream_connect_record);
 223         LOAD_FUNC(pa_stream_connect_playback);
 224         LOAD_FUNC(pa_stream_readable_size);
 225         LOAD_FUNC(pa_stream_writable_size);
 226         LOAD_FUNC(pa_stream_is_corked);
 227         LOAD_FUNC(pa_stream_cork);
 228         LOAD_FUNC(pa_stream_is_suspended);
 229         LOAD_FUNC(pa_stream_get_device_name);
 230         LOAD_FUNC(pa_stream_get_latency);
 231         LOAD_FUNC(pa_path_get_filename);
 232         LOAD_FUNC(pa_get_binary_name);
 233         LOAD_FUNC(pa_threaded_mainloop_free);
 234         LOAD_FUNC(pa_context_errno);
 235         LOAD_FUNC(pa_xmalloc);
 236         LOAD_FUNC(pa_stream_unref);
 237         LOAD_FUNC(pa_threaded_mainloop_accept);
 238         LOAD_FUNC(pa_stream_set_write_callback);
 239         LOAD_FUNC(pa_threaded_mainloop_new);
 240         LOAD_FUNC(pa_context_connect);
 241         LOAD_FUNC(pa_stream_set_buffer_attr);
 242         LOAD_FUNC(pa_stream_get_buffer_attr);
 243         LOAD_FUNC(pa_stream_get_sample_spec);
 244         LOAD_FUNC(pa_stream_get_time);
 245         LOAD_FUNC(pa_stream_set_read_callback);
 246         LOAD_FUNC(pa_stream_set_state_callback);
 247         LOAD_FUNC(pa_stream_set_moved_callback);
 248         LOAD_FUNC(pa_stream_set_underflow_callback);
 249         LOAD_FUNC(pa_stream_new_with_proplist);
 250         LOAD_FUNC(pa_stream_disconnect);
 251         LOAD_FUNC(pa_threaded_mainloop_lock);
 252         LOAD_FUNC(pa_channel_map_init_auto);
 253         LOAD_FUNC(pa_channel_map_parse);
 254         LOAD_FUNC(pa_channel_map_snprint);
 255         LOAD_FUNC(pa_channel_map_equal);
 256         LOAD_FUNC(pa_context_get_server_info);
 257         LOAD_FUNC(pa_context_get_sink_info_by_name);
 258         LOAD_FUNC(pa_context_get_sink_info_list);
 259         LOAD_FUNC(pa_context_get_source_info_by_name);
 260         LOAD_FUNC(pa_context_get_source_info_list);
 261         LOAD_FUNC(pa_operation_get_state);
 262         LOAD_FUNC(pa_operation_unref);
 263         LOAD_FUNC(pa_proplist_new);
 264         LOAD_FUNC(pa_proplist_free);
 265         LOAD_FUNC(pa_proplist_set);
 266         LOAD_FUNC(pa_channel_map_superset);
 267         LOAD_FUNC(pa_stream_set_buffer_attr_callback);
 268         LOAD_FUNC(pa_stream_begin_write);
 269 #undef LOAD_FUNC
 270
 271         if(ret == ALC_FALSE)
 272         {
 273             CloseLib(pa_handle);
 274             pa_handle = NULL;
 275         }
 276     }
 277 #endif /* HAVE_DYNLOAD */
 278     return ret;
 279 }
 280
 281
 282 /* Global flags and properties */
 283 static pa_context_flags_t pulse_ctx_flags;
 284 static pa_proplist *prop_filter;
 285
 286
 287 /* PulseAudio Event Callbacks */
 288 static void context_state_callback(pa_context *context, void *pdata)
 289 {
 290     pa_threaded_mainloop *loop = pdata;
 291     pa_context_state_t state;
 292
 293     state = pa_context_get_state(context);
 294     if(state == PA_CONTEXT_READY || !PA_CONTEXT_IS_GOOD(state))
 295         pa_threaded_mainloop_signal(loop, 0);
 296 }
 297
 298 static void stream_state_callback(pa_stream *stream, void *pdata)
 299 {
 300     pa_threaded_mainloop *loop = pdata;
 301     pa_stream_state_t state;
 302
 303     state = pa_stream_get_state(stream);
 304     if(state == PA_STREAM_READY || !PA_STREAM_IS_GOOD(state))
 305         pa_threaded_mainloop_signal(loop, 0);
 306 }
 307
 308 static void stream_success_callback(pa_stream *UNUSED(stream), int UNUSED(success), void *pdata)
 309 {
 310     pa_threaded_mainloop *loop = pdata;
 311     pa_threaded_mainloop_signal(loop, 0);
 312 }
 313
 314 static void wait_for_operation(pa_operation *op, pa_threaded_mainloop *loop)
 315 {
 316     if(op)
 317     {
 318         while(pa_operation_get_state(op) == PA_OPERATION_RUNNING)
 319             pa_threaded_mainloop_wait(loop);
 320         pa_operation_unref(op);
 321     }
 322 }
 323
 324
 325 static pa_context *connect_context(pa_threaded_mainloop *loop, ALboolean silent)
 326 {
 327     const char *name = "OpenAL Soft";
 328     char path_name[PATH_MAX];
 329     pa_context_state_t state;
 330     pa_context *context;
 331     int err;
 332
 333     if(pa_get_binary_name(path_name, sizeof(path_name)))
 334         name = pa_path_get_filename(path_name);
 335
 336     context = pa_context_new(pa_threaded_mainloop_get_api(loop), name);
 337     if(!context)
 338     {
 339         ERR("pa_context_new() failed\n");
 340         return NULL;
 341     }
 342
 343     pa_context_set_state_callback(context, context_state_callback, loop);
 344
 345     if((err=pa_context_connect(context, NULL, pulse_ctx_flags, NULL)) >= 0)
 346     {
 347         while((state=pa_context_get_state(context)) != PA_CONTEXT_READY)
 348         {
 349             if(!PA_CONTEXT_IS_GOOD(state))
 350             {
 351                 err = pa_context_errno(context);
 352                 if(err > 0)  err = -err;
 353                 break;
 354             }
 355
 356             pa_threaded_mainloop_wait(loop);
 357         }
 358     }
 359     pa_context_set_state_callback(context, NULL, NULL);
 360
 361     if(err < 0)
 362     {
 363         if(!silent)
 364             ERR("Context did not connect: %s\n", pa_strerror(err));
 365         pa_context_unref(context);
 366         return NULL;
 367     }
 368
 369     return context;
 370 }
 371
 372
 373 static ALCboolean pulse_open(pa_threaded_mainloop **loop, pa_context **context,
 374                              void(*state_cb)(pa_context*,void*), void *ptr)
 375 {
 376     if(!(*loop = pa_threaded_mainloop_new()))
 377     {
 378         ERR("pa_threaded_mainloop_new() failed!\n");
 379         return ALC_FALSE;
 380     }
 381     if(pa_threaded_mainloop_start(*loop) < 0)
 382     {
 383         ERR("pa_threaded_mainloop_start() failed\n");
 384         goto error;
 385     }
 386
 387     pa_threaded_mainloop_lock(*loop);
 388
 389     *context = connect_context(*loop, AL_FALSE);
 390     if(!*context)
 391     {
 392         pa_threaded_mainloop_unlock(*loop);
 393         pa_threaded_mainloop_stop(*loop);
 394         goto error;
 395     }
 396     pa_context_set_state_callback(*context, state_cb, ptr);
 397
 398     pa_threaded_mainloop_unlock(*loop);
 399     return ALC_TRUE;
 400
 401 error:
 402     pa_threaded_mainloop_free(*loop);
 403     *loop = NULL;
 404
 405     return ALC_FALSE;
 406 }
 407
 408 static void pulse_close(pa_threaded_mainloop *loop, pa_context *context, pa_stream *stream)
 409 {
 410     pa_threaded_mainloop_lock(loop);
 411
 412     if(stream)
 413     {
 414         pa_stream_set_state_callback(stream, NULL, NULL);
 415         pa_stream_set_moved_callback(stream, NULL, NULL);
 416         pa_stream_set_write_callback(stream, NULL, NULL);
 417         pa_stream_set_buffer_attr_callback(stream, NULL, NULL);
 418         pa_stream_disconnect(stream);
 419         pa_stream_unref(stream);
 420     }
 421
 422     pa_context_disconnect(context);
 423     pa_context_unref(context);
 424
 425     pa_threaded_mainloop_unlock(loop);
 426
 427     pa_threaded_mainloop_stop(loop);
 428     pa_threaded_mainloop_free(loop);
 429 }
 430
 431
 432 typedef struct {
 433     al_string name;
 434     al_string device_name;
 435 } DevMap;
 436 TYPEDEF_VECTOR(DevMap, vector_DevMap)
 437
 438 static vector_DevMap PlaybackDevices;
 439 static vector_DevMap CaptureDevices;
 440
 441 static void clear_devlist(vector_DevMap *list)
 442 {
 443 #define DEINIT_STRS(i)  (AL_STRING_DEINIT((i)->name),AL_STRING_DEINIT((i)->device_name))
 444     VECTOR_FOR_EACH(DevMap, *list, DEINIT_STRS);
 445 #undef DEINIT_STRS
 446     VECTOR_RESIZE(*list, 0);
 447 }
 448
 449
 450 typedef struct ALCpulsePlayback {
 451     DERIVE_FROM_TYPE(ALCbackend);
 452
 453     al_string device_name;
 454
 455     pa_buffer_attr attr;
 456     pa_sample_spec spec;
 457
 458     pa_threaded_mainloop *loop;
 459
 460     pa_stream *stream;
 461     pa_context *context;
 462
 463     volatile ALboolean killNow;
 464     althrd_t thread;
 465 } ALCpulsePlayback;
 466
 467 static void ALCpulsePlayback_deviceCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 468 static void ALCpulsePlayback_probeDevices(void);
 469
 470 static void ALCpulsePlayback_bufferAttrCallback(pa_stream *stream, void *pdata);
 471 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata);
 472 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata);
 473 static void ALCpulsePlayback_streamWriteCallback(pa_stream *p, size_t nbytes, void *userdata);
 474 static void ALCpulsePlayback_sinkInfoCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 475 static void ALCpulsePlayback_sinkNameCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
 476 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata);
 477 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name, pa_threaded_mainloop *loop,
 478                                                  pa_context *context, pa_stream_flags_t flags,
 479                                                  pa_buffer_attr *attr, pa_sample_spec *spec,
 480                                                  pa_channel_map *chanmap);
 481 static int ALCpulsePlayback_mixerProc(void *ptr);
 482
 483 static void ALCpulsePlayback_Construct(ALCpulsePlayback *self, ALCdevice *device);
 484 static void ALCpulsePlayback_Destruct(ALCpulsePlayback *self);
 485 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name);
 486 static void ALCpulsePlayback_close(ALCpulsePlayback *self);
 487 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self);
 488 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self);
 489 static void ALCpulsePlayback_stop(ALCpulsePlayback *self);
 490 static DECLARE_FORWARD2(ALCpulsePlayback, ALCbackend, ALCenum, captureSamples, ALCvoid*, ALCuint)
 491 static DECLARE_FORWARD(ALCpulsePlayback, ALCbackend, ALCuint, availableSamples)
 492 static ALint64 ALCpulsePlayback_getLatency(ALCpulsePlayback *self);
 493 static void ALCpulsePlayback_lock(ALCpulsePlayback *self);
 494 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self);
 495 DECLARE_DEFAULT_ALLOCATORS(ALCpulsePlayback)
 496
 497 DEFINE_ALCBACKEND_VTABLE(ALCpulsePlayback);
 498
 499
 500 static void ALCpulsePlayback_Construct(ALCpulsePlayback *self, ALCdevice *device)
 501 {
 502     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 503     SET_VTABLE2(ALCpulsePlayback, ALCbackend, self);
 504
 505     AL_STRING_INIT(self->device_name);
 506 }
 507
 508 static void ALCpulsePlayback_Destruct(ALCpulsePlayback *self)
 509 {
 510     AL_STRING_DEINIT(self->device_name);
 511     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
 512 }
 513
 514
 515 static void ALCpulsePlayback_deviceCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 516 {
 517     pa_threaded_mainloop *loop = pdata;
 518     const DevMap *iter;
 519     DevMap entry;
 520
 521     if(eol)
 522     {
 523         pa_threaded_mainloop_signal(loop, 0);
 524         return;
 525     }
 526
 527 #define MATCH_INFO_NAME(iter) (al_string_cmp_cstr((iter)->device_name, info->name) == 0)
 528     VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_INFO_NAME);
 529 #undef MATCH_INFO_NAME
 530     if(iter != VECTOR_ITER_END(PlaybackDevices))
 531         return;
 532
 533     TRACE("Got device \"%s\", \"%s\"\n", info->description, info->name);
 534
 535     AL_STRING_INIT(entry.name);
 536     AL_STRING_INIT(entry.device_name);
 537
 538     al_string_copy_cstr(&entry.name, info->description);
 539     al_string_copy_cstr(&entry.device_name, info->name);
 540
 541     VECTOR_PUSH_BACK(PlaybackDevices, entry);
 542 }
 543
 544 static void ALCpulsePlayback_probeDevices(void)
 545 {
 546     pa_threaded_mainloop *loop;
 547
 548     clear_devlist(&PlaybackDevices);
 549
 550     if((loop=pa_threaded_mainloop_new()) &&
 551        pa_threaded_mainloop_start(loop) >= 0)
 552     {
 553         pa_context *context;
 554
 555         pa_threaded_mainloop_lock(loop);
 556         context = connect_context(loop, AL_FALSE);
 557         if(context)
 558         {
 559             pa_operation *o;
 560             pa_stream_flags_t flags;
 561             pa_sample_spec spec;
 562             pa_stream *stream;
 563
 564             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 565                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
 566
 567             spec.format = PA_SAMPLE_S16NE;
 568             spec.rate = 44100;
 569             spec.channels = 2;
 570
 571             stream = ALCpulsePlayback_connectStream(NULL, loop, context, flags,
 572                                                     NULL, &spec, NULL);
 573             if(stream)
 574             {
 575                 o = pa_context_get_sink_info_by_name(context, pa_stream_get_device_name(stream),
 576                                                      ALCpulsePlayback_deviceCallback, loop);
 577                 wait_for_operation(o, loop);
 578
 579                 pa_stream_disconnect(stream);
 580                 pa_stream_unref(stream);
 581                 stream = NULL;
 582             }
 583
 584             o = pa_context_get_sink_info_list(context, ALCpulsePlayback_deviceCallback, loop);
 585             wait_for_operation(o, loop);
 586
 587             pa_context_disconnect(context);
 588             pa_context_unref(context);
 589         }
 590         pa_threaded_mainloop_unlock(loop);
 591         pa_threaded_mainloop_stop(loop);
 592     }
 593     if(loop)
 594         pa_threaded_mainloop_free(loop);
 595 }
 596
 597
 598 static void ALCpulsePlayback_bufferAttrCallback(pa_stream *stream, void *pdata)
 599 {
 600     ALCpulsePlayback *self = pdata;
 601
 602     self->attr = *pa_stream_get_buffer_attr(stream);
 603     TRACE("minreq=%d, tlength=%d, prebuf=%d\n", self->attr.minreq, self->attr.tlength, self->attr.prebuf);
 604 }
 605
 606 static void ALCpulsePlayback_contextStateCallback(pa_context *context, void *pdata)
 607 {
 608     ALCpulsePlayback *self = pdata;
 609     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
 610     {
 611         ERR("Received context failure!\n");
 612         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 613     }
 614     pa_threaded_mainloop_signal(self->loop, 0);
 615 }
 616
 617 static void ALCpulsePlayback_streamStateCallback(pa_stream *stream, void *pdata)
 618 {
 619     ALCpulsePlayback *self = pdata;
 620     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
 621     {
 622         ERR("Received stream failure!\n");
 623         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
 624     }
 625     pa_threaded_mainloop_signal(self->loop, 0);
 626 }
 627
 628 static void ALCpulsePlayback_streamWriteCallback(pa_stream* UNUSED(p), size_t UNUSED(nbytes), void *pdata)
 629 {
 630     ALCpulsePlayback *self = pdata;
 631     pa_threaded_mainloop_signal(self->loop, 0);
 632 }
 633
 634 static void ALCpulsePlayback_sinkInfoCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 635 {
 636     ALCpulsePlayback *self = pdata;
 637     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 638     const struct {
 639         const char *str;
 640         enum DevFmtChannels chans;
 641     } chanmaps[] = {
 642         { "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right",
 643           DevFmtX71 },
 644         { "front-left,front-right,front-center,lfe,rear-center,side-left,side-right",
 645           DevFmtX61 },
 646         { "front-left,front-right,front-center,lfe,side-left,side-right",
 647           DevFmtX51 },
 648         { "front-left,front-right,front-center,lfe,rear-left,rear-right",
 649           DevFmtX51Rear },
 650         { "front-left,front-right,rear-left,rear-right", DevFmtQuad },
 651         { "front-left,front-right", DevFmtStereo },
 652         { "mono", DevFmtMono },
 653         { NULL, 0 }
 654     };
 655     int i;
 656
 657     if(eol)
 658     {
 659         pa_threaded_mainloop_signal(self->loop, 0);
 660         return;
 661     }
 662
 663     for(i = 0;chanmaps[i].str;i++)
 664     {
 665         pa_channel_map map;
 666         if(!pa_channel_map_parse(&map, chanmaps[i].str))
 667             continue;
 668
 669         if(pa_channel_map_superset(&info->channel_map, &map))
 670         {
 671             if(!(device->Flags&DEVICE_CHANNELS_REQUEST))
 672                 device->FmtChans = chanmaps[i].chans;
 673             break;
 674         }
 675     }
 676
 677     if(info->active_port)
 678         TRACE("Active port: %s (%s)\n", info->active_port->name, info->active_port->description);
 679     device->IsHeadphones = (info->active_port &&
 680                             strcmp(info->active_port->name, "analog-output-headphones") == 0 &&
 681                             device->FmtChans == DevFmtStereo);
 682
 683     if(!chanmaps[i].str)
 684     {
 685         char chanmap_str[PA_CHANNEL_MAP_SNPRINT_MAX] = "";
 686         pa_channel_map_snprint(chanmap_str, sizeof(chanmap_str), &info->channel_map);
 687         WARN("Failed to find format for channel map:\n    %s\n", chanmap_str);
 688     }
 689 }
 690
 691 static void ALCpulsePlayback_sinkNameCallback(pa_context *UNUSED(context), const pa_sink_info *info, int eol, void *pdata)
 692 {
 693     ALCpulsePlayback *self = pdata;
 694     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 695
 696     if(eol)
 697     {
 698         pa_threaded_mainloop_signal(self->loop, 0);
 699         return;
 700     }
 701
 702     al_string_copy_cstr(&device->DeviceName, info->description);
 703 }
 704
 705
 706 static void ALCpulsePlayback_streamMovedCallback(pa_stream *stream, void *pdata)
 707 {
 708     ALCpulsePlayback *self = pdata;
 709
 710     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
 711
 712     TRACE("Stream moved to %s\n", al_string_get_cstr(self->device_name));
 713 }
 714
 715
 716 static pa_stream *ALCpulsePlayback_connectStream(const char *device_name,
 717     pa_threaded_mainloop *loop, pa_context *context,
 718     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
 719     pa_channel_map *chanmap)
 720 {
 721     pa_stream_state_t state;
 722     pa_stream *stream;
 723
 724     stream = pa_stream_new_with_proplist(context, "Playback Stream", spec, chanmap, prop_filter);
 725     if(!stream)
 726     {
 727         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
 728         return NULL;
 729     }
 730
 731     pa_stream_set_state_callback(stream, stream_state_callback, loop);
 732
 733     if(pa_stream_connect_playback(stream, device_name, attr, flags, NULL, NULL) < 0)
 734     {
 735         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
 736         pa_stream_unref(stream);
 737         return NULL;
 738     }
 739
 740     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
 741     {
 742         if(!PA_STREAM_IS_GOOD(state))
 743         {
 744             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
 745             pa_stream_unref(stream);
 746             return NULL;
 747         }
 748
 749         pa_threaded_mainloop_wait(loop);
 750     }
 751     pa_stream_set_state_callback(stream, NULL, NULL);
 752
 753     return stream;
 754 }
 755
 756
 757 static int ALCpulsePlayback_mixerProc(void *ptr)
 758 {
 759     ALCpulsePlayback *self = ptr;
 760     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 761     ALuint buffer_size;
 762     ALint update_size;
 763     size_t frame_size;
 764     ssize_t len;
 765
 766     SetRTPriority();
 767     althrd_setname(althrd_current(), MIXER_THREAD_NAME);
 768
 769     pa_threaded_mainloop_lock(self->loop);
 770     frame_size = pa_frame_size(&self->spec);
 771     update_size = device->UpdateSize * frame_size;
 772
 773     /* Sanitize buffer metrics, in case we actually have less than what we
 774      * asked for. */
 775     buffer_size = minu(update_size*device->NumUpdates, self->attr.tlength);
 776     update_size = minu(update_size, buffer_size/2);
 777     do {
 778         len = pa_stream_writable_size(self->stream) - self->attr.tlength +
 779               buffer_size;
 780         if(len < update_size)
 781         {
 782             if(pa_stream_is_corked(self->stream) == 1)
 783             {
 784                 pa_operation *o;
 785                 o = pa_stream_cork(self->stream, 0, NULL, NULL);
 786                 if(o) pa_operation_unref(o);
 787             }
 788             pa_threaded_mainloop_wait(self->loop);
 789             continue;
 790         }
 791         len -= len%update_size;
 792
 793         while(len > 0)
 794         {
 795             size_t newlen = len;
 796             void *buf;
 797             pa_free_cb_t free_func = NULL;
 798
 799             if(pa_stream_begin_write(self->stream, &buf, &newlen) < 0)
 800             {
 801                 buf = pa_xmalloc(newlen);
 802                 free_func = pa_xfree;
 803             }
 804
 805             aluMixData(device, buf, newlen/frame_size);
 806
 807             pa_stream_write(self->stream, buf, newlen, free_func, 0, PA_SEEK_RELATIVE);
 808             len -= newlen;
 809         }
 810     } while(!self->killNow && device->Connected);
 811     pa_threaded_mainloop_unlock(self->loop);
 812
 813     return 0;
 814 }
 815
 816
 817 static ALCenum ALCpulsePlayback_open(ALCpulsePlayback *self, const ALCchar *name)
 818 {
 819     const char *pulse_name = NULL;
 820     pa_stream_flags_t flags;
 821     pa_sample_spec spec;
 822     pa_operation *o;
 823
 824     if(name)
 825     {
 826         const DevMap *iter;
 827
 828         if(VECTOR_SIZE(PlaybackDevices) == 0)
 829             ALCpulsePlayback_probeDevices();
 830
 831 #define MATCH_NAME(iter) (al_string_cmp_cstr((iter)->name, name) == 0)
 832         VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_NAME);
 833 #undef MATCH_NAME
 834         if(iter == VECTOR_ITER_END(PlaybackDevices))
 835             return ALC_INVALID_VALUE;
 836         pulse_name = al_string_get_cstr(iter->device_name);
 837     }
 838
 839     if(!pulse_open(&self->loop, &self->context, ALCpulsePlayback_contextStateCallback, self))
 840         return ALC_INVALID_VALUE;
 841
 842     pa_threaded_mainloop_lock(self->loop);
 843
 844     flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
 845             PA_STREAM_FIX_CHANNELS;
 846     if(!GetConfigValueBool("pulse", "allow-moves", 0))
 847         flags |= PA_STREAM_DONT_MOVE;
 848
 849     spec.format = PA_SAMPLE_S16NE;
 850     spec.rate = 44100;
 851     spec.channels = 2;
 852
 853     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
 854     self->stream = ALCpulsePlayback_connectStream(pulse_name, self->loop, self->context,
 855                                                   flags, NULL, &spec, NULL);
 856     if(!self->stream)
 857     {
 858         pa_threaded_mainloop_unlock(self->loop);
 859         pulse_close(self->loop, self->context, self->stream);
 860         self->loop = NULL;
 861         self->context = NULL;
 862         return ALC_INVALID_VALUE;
 863     }
 864     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
 865
 866     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
 867     o = pa_context_get_sink_info_by_name(self->context,
 868                                          al_string_get_cstr(self->device_name),
 869                                          ALCpulsePlayback_sinkNameCallback, self);
 870     wait_for_operation(o, self->loop);
 871
 872     pa_threaded_mainloop_unlock(self->loop);
 873
 874     return ALC_NO_ERROR;
 875 }
 876
 877 static void ALCpulsePlayback_close(ALCpulsePlayback *self)
 878 {
 879     pulse_close(self->loop, self->context, self->stream);
 880     self->loop = NULL;
 881     self->context = NULL;
 882     self->stream = NULL;
 883
 884     al_string_clear(&self->device_name);
 885 }
 886
 887 static ALCboolean ALCpulsePlayback_reset(ALCpulsePlayback *self)
 888 {
 889     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
 890     pa_stream_flags_t flags = 0;
 891     const char *mapname = NULL;
 892     pa_channel_map chanmap;
 893     pa_operation *o;
 894     ALuint len;
 895
 896     pa_threaded_mainloop_lock(self->loop);
 897
 898     if(self->stream)
 899     {
 900         pa_stream_set_state_callback(self->stream, NULL, NULL);
 901         pa_stream_set_moved_callback(self->stream, NULL, NULL);
 902         pa_stream_set_write_callback(self->stream, NULL, NULL);
 903         pa_stream_set_buffer_attr_callback(self->stream, NULL, NULL);
 904         pa_stream_disconnect(self->stream);
 905         pa_stream_unref(self->stream);
 906         self->stream = NULL;
 907     }
 908
 909     o = pa_context_get_sink_info_by_name(self->context, al_string_get_cstr(self->device_name),
 910                                          ALCpulsePlayback_sinkInfoCallback, self);
 911     wait_for_operation(o, self->loop);
 912
 913     if(!(device->Flags&DEVICE_FREQUENCY_REQUEST))
 914         flags |= PA_STREAM_FIX_RATE;
 915     flags |= PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
 916     flags |= PA_STREAM_ADJUST_LATENCY;
 917     flags |= PA_STREAM_START_CORKED;
 918     if(!GetConfigValueBool("pulse", "allow-moves", 0))
 919         flags |= PA_STREAM_DONT_MOVE;
 920
 921     switch(device->FmtType)
 922     {
 923         case DevFmtByte:
 924             device->FmtType = DevFmtUByte;
 925             /* fall-through */
 926         case DevFmtUByte:
 927             self->spec.format = PA_SAMPLE_U8;
 928             break;
 929         case DevFmtUShort:
 930             device->FmtType = DevFmtShort;
 931             /* fall-through */
 932         case DevFmtShort:
 933             self->spec.format = PA_SAMPLE_S16NE;
 934             break;
 935         case DevFmtUInt:
 936             device->FmtType = DevFmtInt;
 937             /* fall-through */
 938         case DevFmtInt:
 939             self->spec.format = PA_SAMPLE_S32NE;
 940             break;
 941         case DevFmtFloat:
 942             self->spec.format = PA_SAMPLE_FLOAT32NE;
 943             break;
 944     }
 945     self->spec.rate = device->Frequency;
 946     self->spec.channels = ChannelsFromDevFmt(device->FmtChans);
 947
 948     if(pa_sample_spec_valid(&self->spec) == 0)
 949     {
 950         ERR("Invalid sample format\n");
 951         pa_threaded_mainloop_unlock(self->loop);
 952         return ALC_FALSE;
 953     }
 954
 955     switch(device->FmtChans)
 956     {
 957         case DevFmtMono:
 958             mapname = "mono";
 959             break;
 960         case DevFmtBFormat3D:
 961             device->FmtChans = DevFmtStereo;
 962             /*fall-through*/
 963         case DevFmtStereo:
 964             mapname = "front-left,front-right";
 965             break;
 966         case DevFmtQuad:
 967             mapname = "front-left,front-right,rear-left,rear-right";
 968             break;
 969         case DevFmtX51:
 970             mapname = "front-left,front-right,front-center,lfe,side-left,side-right";
 971             break;
 972         case DevFmtX51Rear:
 973             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right";
 974             break;
 975         case DevFmtX61:
 976             mapname = "front-left,front-right,front-center,lfe,rear-center,side-left,side-right";
 977             break;
 978         case DevFmtX71:
 979             mapname = "front-left,front-right,front-center,lfe,rear-left,rear-right,side-left,side-right";
 980             break;
 981     }
 982     if(!pa_channel_map_parse(&chanmap, mapname))
 983     {
 984         ERR("Failed to build channel map for %s\n", DevFmtChannelsString(device->FmtChans));
 985         pa_threaded_mainloop_unlock(self->loop);
 986         return ALC_FALSE;
 987     }
 988     SetDefaultWFXChannelOrder(device);
 989
 990     self->attr.fragsize = -1;
 991     self->attr.prebuf = 0;
 992     self->attr.minreq = device->UpdateSize * pa_frame_size(&self->spec);
 993     self->attr.tlength = self->attr.minreq * maxu(device->NumUpdates, 2);
 994     self->attr.maxlength = -1;
 995
 996     self->stream = ALCpulsePlayback_connectStream(al_string_get_cstr(self->device_name),
 997                                                   self->loop, self->context, flags,
 998                                                   &self->attr, &self->spec, &chanmap);
 999     if(!self->stream)
1000     {
1001         pa_threaded_mainloop_unlock(self->loop);
1002         return ALC_FALSE;
1003     }
1004     pa_stream_set_state_callback(self->stream, ALCpulsePlayback_streamStateCallback, self);
1005     pa_stream_set_moved_callback(self->stream, ALCpulsePlayback_streamMovedCallback, self);
1006     pa_stream_set_write_callback(self->stream, ALCpulsePlayback_streamWriteCallback, self);
1007
1008     self->spec = *(pa_stream_get_sample_spec(self->stream));
1009     if(device->Frequency != self->spec.rate)
1010     {
1011         /* Server updated our playback rate, so modify the buffer attribs
1012          * accordingly. */
1013         device->NumUpdates = (ALuint)((ALdouble)device->NumUpdates / device->Frequency *
1014                                       self->spec.rate + 0.5);
1015         self->attr.minreq  = device->UpdateSize * pa_frame_size(&self->spec);
1016         self->attr.tlength = self->attr.minreq * clampu(device->NumUpdates, 2, 16);
1017         self->attr.maxlength = -1;
1018         self->attr.prebuf  = 0;
1019
1020         o = pa_stream_set_buffer_attr(self->stream, &self->attr,
1021                                       stream_success_callback, self->loop);
1022         wait_for_operation(o, self->loop);
1023
1024         device->Frequency = self->spec.rate;
1025     }
1026
1027     pa_stream_set_buffer_attr_callback(self->stream, ALCpulsePlayback_bufferAttrCallback, self);
1028     ALCpulsePlayback_bufferAttrCallback(self->stream, self);
1029
1030     len = self->attr.minreq / pa_frame_size(&self->spec);
1031     device->NumUpdates = (ALuint)((ALdouble)device->NumUpdates/len*device->UpdateSize + 0.5);
1032     device->NumUpdates = clampu(device->NumUpdates, 2, 16);
1033     device->UpdateSize = len;
1034
1035     pa_threaded_mainloop_unlock(self->loop);
1036     return ALC_TRUE;
1037 }
1038
1039 static ALCboolean ALCpulsePlayback_start(ALCpulsePlayback *self)
1040 {
1041     self->killNow = AL_FALSE;
1042     if(althrd_create(&self->thread, ALCpulsePlayback_mixerProc, self) != althrd_success)
1043         return ALC_FALSE;
1044     return ALC_TRUE;
1045 }
1046
1047 static void ALCpulsePlayback_stop(ALCpulsePlayback *self)
1048 {
1049     pa_operation *o;
1050     int res;
1051
1052     if(!self->stream || self->killNow)
1053         return;
1054
1055     self->killNow = AL_TRUE;
1056     /* Signal the main loop in case PulseAudio isn't sending us audio requests
1057      * (e.g. if the device is suspended). We need to lock the mainloop in case
1058      * the mixer is between checking the killNow flag but before waiting for
1059      * the signal.
1060      */
1061     pa_threaded_mainloop_lock(self->loop);
1062     pa_threaded_mainloop_unlock(self->loop);
1063     pa_threaded_mainloop_signal(self->loop, 0);
1064     althrd_join(self->thread, &res);
1065
1066     pa_threaded_mainloop_lock(self->loop);
1067
1068     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1069     wait_for_operation(o, self->loop);
1070
1071     pa_threaded_mainloop_unlock(self->loop);
1072 }
1073
1074
1075 static ALint64 ALCpulsePlayback_getLatency(ALCpulsePlayback *self)
1076 {
1077     pa_usec_t latency = 0;
1078     int neg, err;
1079
1080     if((err=pa_stream_get_latency(self->stream, &latency, &neg)) != 0)
1081     {
1082         /* FIXME: if err = -PA_ERR_NODATA, it means we were called too soon
1083          * after starting the stream and no timing info has been received from
1084          * the server yet. Should we wait, possibly stalling the app, or give a
1085          * dummy value? Either way, it shouldn't be 0. */
1086         if(err != -PA_ERR_NODATA)
1087             ERR("Failed to get stream latency: 0x%x\n", err);
1088         return 0;
1089     }
1090
1091     if(neg) latency = 0;
1092     return (ALint64)minu64(latency, U64(0x7fffffffffffffff)/1000) * 1000;
1093 }
1094
1095
1096 static void ALCpulsePlayback_lock(ALCpulsePlayback *self)
1097 {
1098     pa_threaded_mainloop_lock(self->loop);
1099 }
1100
1101 static void ALCpulsePlayback_unlock(ALCpulsePlayback *self)
1102 {
1103     pa_threaded_mainloop_unlock(self->loop);
1104 }
1105
1106
1107 typedef struct ALCpulseCapture {
1108     DERIVE_FROM_TYPE(ALCbackend);
1109
1110     al_string device_name;
1111
1112     const void *cap_store;
1113     size_t cap_len;
1114     size_t cap_remain;
1115
1116     ALCuint last_readable;
1117
1118     pa_buffer_attr attr;
1119     pa_sample_spec spec;
1120
1121     pa_threaded_mainloop *loop;
1122
1123     pa_stream *stream;
1124     pa_context *context;
1125 } ALCpulseCapture;
1126
1127 static void ALCpulseCapture_deviceCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1128 static void ALCpulseCapture_probeDevices(void);
1129
1130 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata);
1131 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata);
1132 static void ALCpulseCapture_sourceNameCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
1133 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata);
1134 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1135                                                 pa_threaded_mainloop *loop, pa_context *context,
1136                                                 pa_stream_flags_t flags, pa_buffer_attr *attr,
1137                                                 pa_sample_spec *spec, pa_channel_map *chanmap);
1138
1139 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device);
1140 static void ALCpulseCapture_Destruct(ALCpulseCapture *self);
1141 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name);
1142 static void ALCpulseCapture_close(ALCpulseCapture *self);
1143 static DECLARE_FORWARD(ALCpulseCapture, ALCbackend, ALCboolean, reset)
1144 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self);
1145 static void ALCpulseCapture_stop(ALCpulseCapture *self);
1146 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples);
1147 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self);
1148 static ALint64 ALCpulseCapture_getLatency(ALCpulseCapture *self);
1149 static void ALCpulseCapture_lock(ALCpulseCapture *self);
1150 static void ALCpulseCapture_unlock(ALCpulseCapture *self);
1151 DECLARE_DEFAULT_ALLOCATORS(ALCpulseCapture)
1152
1153 DEFINE_ALCBACKEND_VTABLE(ALCpulseCapture);
1154
1155
1156 static void ALCpulseCapture_Construct(ALCpulseCapture *self, ALCdevice *device)
1157 {
1158     ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
1159     SET_VTABLE2(ALCpulseCapture, ALCbackend, self);
1160
1161     AL_STRING_INIT(self->device_name);
1162 }
1163
1164 static void ALCpulseCapture_Destruct(ALCpulseCapture *self)
1165 {
1166     AL_STRING_DEINIT(self->device_name);
1167     ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
1168 }
1169
1170
1171 static void ALCpulseCapture_deviceCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1172 {
1173     pa_threaded_mainloop *loop = pdata;
1174     const DevMap *iter;
1175     DevMap entry;
1176
1177     if(eol)
1178     {
1179         pa_threaded_mainloop_signal(loop, 0);
1180         return;
1181     }
1182
1183 #define MATCH_INFO_NAME(iter) (al_string_cmp_cstr((iter)->device_name, info->name) == 0)
1184     VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_INFO_NAME);
1185 #undef MATCH_INFO_NAME
1186     if(iter != VECTOR_ITER_END(CaptureDevices))
1187         return;
1188
1189     TRACE("Got device \"%s\", \"%s\"\n", info->description, info->name);
1190
1191     AL_STRING_INIT(entry.name);
1192     AL_STRING_INIT(entry.device_name);
1193
1194     al_string_copy_cstr(&entry.name, info->description);
1195     al_string_copy_cstr(&entry.device_name, info->name);
1196
1197     VECTOR_PUSH_BACK(CaptureDevices, entry);
1198 }
1199
1200 static void ALCpulseCapture_probeDevices(void)
1201 {
1202     pa_threaded_mainloop *loop;
1203
1204     clear_devlist(&CaptureDevices);
1205
1206     if((loop=pa_threaded_mainloop_new()) &&
1207        pa_threaded_mainloop_start(loop) >= 0)
1208     {
1209         pa_context *context;
1210
1211         pa_threaded_mainloop_lock(loop);
1212         context = connect_context(loop, AL_FALSE);
1213         if(context)
1214         {
1215             pa_operation *o;
1216             pa_stream_flags_t flags;
1217             pa_sample_spec spec;
1218             pa_stream *stream;
1219
1220             flags = PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
1221                     PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE;
1222
1223             spec.format = PA_SAMPLE_S16NE;
1224             spec.rate = 44100;
1225             spec.channels = 1;
1226
1227             stream = ALCpulseCapture_connectStream(NULL, loop, context, flags,
1228                                                    NULL, &spec, NULL);
1229             if(stream)
1230             {
1231                 o = pa_context_get_source_info_by_name(context, pa_stream_get_device_name(stream),
1232                                                        ALCpulseCapture_deviceCallback, loop);
1233                 wait_for_operation(o, loop);
1234
1235                 pa_stream_disconnect(stream);
1236                 pa_stream_unref(stream);
1237                 stream = NULL;
1238             }
1239
1240             o = pa_context_get_source_info_list(context, ALCpulseCapture_deviceCallback, loop);
1241             wait_for_operation(o, loop);
1242
1243             pa_context_disconnect(context);
1244             pa_context_unref(context);
1245         }
1246         pa_threaded_mainloop_unlock(loop);
1247         pa_threaded_mainloop_stop(loop);
1248     }
1249     if(loop)
1250         pa_threaded_mainloop_free(loop);
1251 }
1252
1253
1254 static void ALCpulseCapture_contextStateCallback(pa_context *context, void *pdata)
1255 {
1256     ALCpulseCapture *self = pdata;
1257     if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
1258     {
1259         ERR("Received context failure!\n");
1260         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1261     }
1262     pa_threaded_mainloop_signal(self->loop, 0);
1263 }
1264
1265 static void ALCpulseCapture_streamStateCallback(pa_stream *stream, void *pdata)
1266 {
1267     ALCpulseCapture *self = pdata;
1268     if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
1269     {
1270         ERR("Received stream failure!\n");
1271         aluHandleDisconnect(STATIC_CAST(ALCbackend,self)->mDevice);
1272     }
1273     pa_threaded_mainloop_signal(self->loop, 0);
1274 }
1275
1276
1277 static void ALCpulseCapture_sourceNameCallback(pa_context *UNUSED(context), const pa_source_info *info, int eol, void *pdata)
1278 {
1279     ALCpulseCapture *self = pdata;
1280     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1281
1282     if(eol)
1283     {
1284         pa_threaded_mainloop_signal(self->loop, 0);
1285         return;
1286     }
1287
1288     al_string_copy_cstr(&device->DeviceName, info->description);
1289 }
1290
1291
1292 static void ALCpulseCapture_streamMovedCallback(pa_stream *stream, void *pdata)
1293 {
1294     ALCpulseCapture *self = pdata;
1295
1296     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(stream));
1297
1298     TRACE("Stream moved to %s\n", al_string_get_cstr(self->device_name));
1299 }
1300
1301
1302 static pa_stream *ALCpulseCapture_connectStream(const char *device_name,
1303     pa_threaded_mainloop *loop, pa_context *context,
1304     pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
1305     pa_channel_map *chanmap)
1306 {
1307     pa_stream_state_t state;
1308     pa_stream *stream;
1309
1310     stream = pa_stream_new_with_proplist(context, "Capture Stream", spec, chanmap, prop_filter);
1311     if(!stream)
1312     {
1313         ERR("pa_stream_new_with_proplist() failed: %s\n", pa_strerror(pa_context_errno(context)));
1314         return NULL;
1315     }
1316
1317     pa_stream_set_state_callback(stream, stream_state_callback, loop);
1318
1319     if(pa_stream_connect_record(stream, device_name, attr, flags) < 0)
1320     {
1321         ERR("Stream did not connect: %s\n", pa_strerror(pa_context_errno(context)));
1322         pa_stream_unref(stream);
1323         return NULL;
1324     }
1325
1326     while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
1327     {
1328         if(!PA_STREAM_IS_GOOD(state))
1329         {
1330             ERR("Stream did not get ready: %s\n", pa_strerror(pa_context_errno(context)));
1331             pa_stream_unref(stream);
1332             return NULL;
1333         }
1334
1335         pa_threaded_mainloop_wait(loop);
1336     }
1337     pa_stream_set_state_callback(stream, NULL, NULL);
1338
1339     return stream;
1340 }
1341
1342
1343 static ALCenum ALCpulseCapture_open(ALCpulseCapture *self, const ALCchar *name)
1344 {
1345     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1346     const char *pulse_name = NULL;
1347     pa_stream_flags_t flags = 0;
1348     pa_channel_map chanmap;
1349     pa_operation *o;
1350     ALuint samples;
1351
1352     if(name)
1353     {
1354         const DevMap *iter;
1355
1356         if(VECTOR_SIZE(CaptureDevices) == 0)
1357             ALCpulseCapture_probeDevices();
1358
1359 #define MATCH_NAME(iter) (al_string_cmp_cstr((iter)->name, name) == 0)
1360         VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_NAME);
1361 #undef MATCH_NAME
1362         if(iter == VECTOR_ITER_END(CaptureDevices))
1363             return ALC_INVALID_VALUE;
1364         pulse_name = al_string_get_cstr(iter->device_name);
1365     }
1366
1367     if(!pulse_open(&self->loop, &self->context, ALCpulseCapture_contextStateCallback, self))
1368         return ALC_INVALID_VALUE;
1369
1370     pa_threaded_mainloop_lock(self->loop);
1371
1372     self->spec.rate = device->Frequency;
1373     self->spec.channels = ChannelsFromDevFmt(device->FmtChans);
1374
1375     switch(device->FmtType)
1376     {
1377         case DevFmtUByte:
1378             self->spec.format = PA_SAMPLE_U8;
1379             break;
1380         case DevFmtShort:
1381             self->spec.format = PA_SAMPLE_S16NE;
1382             break;
1383         case DevFmtInt:
1384             self->spec.format = PA_SAMPLE_S32NE;
1385             break;
1386         case DevFmtFloat:
1387             self->spec.format = PA_SAMPLE_FLOAT32NE;
1388             break;
1389         case DevFmtByte:
1390         case DevFmtUShort:
1391         case DevFmtUInt:
1392             ERR("%s capture samples not supported\n", DevFmtTypeString(device->FmtType));
1393             pa_threaded_mainloop_unlock(self->loop);
1394             goto fail;
1395     }
1396
1397     if(pa_sample_spec_valid(&self->spec) == 0)
1398     {
1399         ERR("Invalid sample format\n");
1400         pa_threaded_mainloop_unlock(self->loop);
1401         goto fail;
1402     }
1403
1404     if(!pa_channel_map_init_auto(&chanmap, self->spec.channels, PA_CHANNEL_MAP_WAVEEX))
1405     {
1406         ERR("Couldn't build map for channel count (%d)!\n", self->spec.channels);
1407         pa_threaded_mainloop_unlock(self->loop);
1408         goto fail;
1409     }
1410
1411     samples = device->UpdateSize * device->NumUpdates;
1412     samples = maxu(samples, 100 * device->Frequency / 1000);
1413
1414     self->attr.minreq = -1;
1415     self->attr.prebuf = -1;
1416     self->attr.maxlength = samples * pa_frame_size(&self->spec);
1417     self->attr.tlength = -1;
1418     self->attr.fragsize = minu(samples, 50*device->Frequency/1000) *
1419                           pa_frame_size(&self->spec);
1420
1421     flags |= PA_STREAM_START_CORKED|PA_STREAM_ADJUST_LATENCY;
1422     if(!GetConfigValueBool("pulse", "allow-moves", 0))
1423         flags |= PA_STREAM_DONT_MOVE;
1424
1425     TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
1426     self->stream = ALCpulseCapture_connectStream(pulse_name, self->loop, self->context,
1427                                                  flags, &self->attr, &self->spec,
1428                                                  &chanmap);
1429     if(!self->stream)
1430     {
1431         pa_threaded_mainloop_unlock(self->loop);
1432         goto fail;
1433     }
1434     pa_stream_set_moved_callback(self->stream, ALCpulseCapture_streamMovedCallback, self);
1435     pa_stream_set_state_callback(self->stream, ALCpulseCapture_streamStateCallback, self);
1436
1437     al_string_copy_cstr(&self->device_name, pa_stream_get_device_name(self->stream));
1438     o = pa_context_get_source_info_by_name(self->context,
1439                                            al_string_get_cstr(self->device_name),
1440                                            ALCpulseCapture_sourceNameCallback, self);
1441     wait_for_operation(o, self->loop);
1442
1443     pa_threaded_mainloop_unlock(self->loop);
1444     return ALC_NO_ERROR;
1445
1446 fail:
1447     pulse_close(self->loop, self->context, self->stream);
1448     self->loop = NULL;
1449     self->context = NULL;
1450     self->stream = NULL;
1451
1452     return ALC_INVALID_VALUE;
1453 }
1454
1455 static void ALCpulseCapture_close(ALCpulseCapture *self)
1456 {
1457     pulse_close(self->loop, self->context, self->stream);
1458     self->loop = NULL;
1459     self->context = NULL;
1460     self->stream = NULL;
1461
1462     al_string_clear(&self->device_name);
1463 }
1464
1465 static ALCboolean ALCpulseCapture_start(ALCpulseCapture *self)
1466 {
1467     pa_operation *o;
1468     o = pa_stream_cork(self->stream, 0, stream_success_callback, self->loop);
1469     wait_for_operation(o, self->loop);
1470
1471     return ALC_TRUE;
1472 }
1473
1474 static void ALCpulseCapture_stop(ALCpulseCapture *self)
1475 {
1476     pa_operation *o;
1477     o = pa_stream_cork(self->stream, 1, stream_success_callback, self->loop);
1478     wait_for_operation(o, self->loop);
1479 }
1480
1481 static ALCenum ALCpulseCapture_captureSamples(ALCpulseCapture *self, ALCvoid *buffer, ALCuint samples)
1482 {
1483     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1484     ALCuint todo = samples * pa_frame_size(&self->spec);
1485
1486     /* Capture is done in fragment-sized chunks, so we loop until we get all
1487      * that's available */
1488     self->last_readable -= todo;
1489     while(todo > 0)
1490     {
1491         size_t rem = todo;
1492
1493         if(self->cap_len == 0)
1494         {
1495             pa_stream_state_t state;
1496
1497             state = pa_stream_get_state(self->stream);
1498             if(!PA_STREAM_IS_GOOD(state))
1499             {
1500                 aluHandleDisconnect(device);
1501                 break;
1502             }
1503             if(pa_stream_peek(self->stream, &self->cap_store, &self->cap_len) < 0)
1504             {
1505                 ERR("pa_stream_peek() failed: %s\n",
1506                     pa_strerror(pa_context_errno(self->context)));
1507                 aluHandleDisconnect(device);
1508                 break;
1509             }
1510             self->cap_remain = self->cap_len;
1511         }
1512         if(rem > self->cap_remain)
1513             rem = self->cap_remain;
1514
1515         memcpy(buffer, self->cap_store, rem);
1516
1517         buffer = (ALbyte*)buffer + rem;
1518         todo -= rem;
1519
1520         self->cap_store = (ALbyte*)self->cap_store + rem;
1521         self->cap_remain -= rem;
1522         if(self->cap_remain == 0)
1523         {
1524             pa_stream_drop(self->stream);
1525             self->cap_len = 0;
1526         }
1527     }
1528     if(todo > 0)
1529         memset(buffer, ((device->FmtType==DevFmtUByte) ? 0x80 : 0), todo);
1530
1531     return ALC_NO_ERROR;
1532 }
1533
1534 static ALCuint ALCpulseCapture_availableSamples(ALCpulseCapture *self)
1535 {
1536     ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
1537     size_t readable = self->cap_remain;
1538
1539     if(device->Connected)
1540     {
1541         ssize_t got = pa_stream_readable_size(self->stream);
1542         if(got < 0)
1543         {
1544             ERR("pa_stream_readable_size() failed: %s\n", pa_strerror(got));
1545             aluHandleDisconnect(device);
1546         }
1547         else if((size_t)got > self->cap_len)
1548             readable += got - self->cap_len;
1549     }
1550
1551     if(self->last_readable < readable)
1552         self->last_readable = readable;
1553     return self->last_readable / pa_frame_size(&self->spec);
1554 }
1555
1556
1557 static ALint64 ALCpulseCapture_getLatency(ALCpulseCapture *self)
1558 {
1559     pa_usec_t latency = 0;
1560     int neg;
1561
1562     if(pa_stream_get_latency(self->stream, &latency, &neg) != 0)
1563     {
1564         ERR("Failed to get stream latency!\n");
1565         return 0;
1566     }
1567
1568     if(neg) latency = 0;
1569     return (ALint64)minu64(latency, U64(0x7fffffffffffffff)/1000) * 1000;
1570 }
1571
1572
1573 static void ALCpulseCapture_lock(ALCpulseCapture *self)
1574 {
1575     pa_threaded_mainloop_lock(self->loop);
1576 }
1577
1578 static void ALCpulseCapture_unlock(ALCpulseCapture *self)
1579 {
1580     pa_threaded_mainloop_unlock(self->loop);
1581 }
1582
1583
1584 typedef struct ALCpulseBackendFactory {
1585     DERIVE_FROM_TYPE(ALCbackendFactory);
1586 } ALCpulseBackendFactory;
1587 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1588
1589 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory *self);
1590 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory *self);
1591 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory *self, ALCbackend_Type type);
1592 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory *self, enum DevProbe type);
1593 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
1594
1595 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1596
1597
1598 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1599 {
1600     ALCboolean ret = ALC_FALSE;
1601
1602     VECTOR_INIT(PlaybackDevices);
1603     VECTOR_INIT(CaptureDevices);
1604
1605     if(pulse_load())
1606     {
1607         pa_threaded_mainloop *loop;
1608
1609         pulse_ctx_flags = 0;
1610         if(!GetConfigValueBool("pulse", "spawn-server", 1))
1611             pulse_ctx_flags |= PA_CONTEXT_NOAUTOSPAWN;
1612
1613         if((loop=pa_threaded_mainloop_new()) &&
1614            pa_threaded_mainloop_start(loop) >= 0)
1615         {
1616             pa_context *context;
1617
1618             pa_threaded_mainloop_lock(loop);
1619             context = connect_context(loop, AL_TRUE);
1620             if(context)
1621             {
1622                 ret = ALC_TRUE;
1623
1624                 /* Some libraries (Phonon, Qt) set some pulseaudio properties
1625                  * through environment variables, which causes all streams in
1626                  * the process to inherit them. This attempts to filter those
1627                  * properties out by setting them to 0-length data. */
1628                 prop_filter = pa_proplist_new();
1629                 pa_proplist_set(prop_filter, PA_PROP_MEDIA_ROLE, NULL, 0);
1630                 pa_proplist_set(prop_filter, "phonon.streamid", NULL, 0);
1631
1632                 pa_context_disconnect(context);
1633                 pa_context_unref(context);
1634             }
1635             pa_threaded_mainloop_unlock(loop);
1636             pa_threaded_mainloop_stop(loop);
1637         }
1638         if(loop)
1639             pa_threaded_mainloop_free(loop);
1640     }
1641
1642     return ret;
1643 }
1644
1645 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1646 {
1647     clear_devlist(&PlaybackDevices);
1648     VECTOR_DEINIT(PlaybackDevices);
1649
1650     clear_devlist(&CaptureDevices);
1651     VECTOR_DEINIT(CaptureDevices);
1652
1653     if(prop_filter)
1654         pa_proplist_free(prop_filter);
1655     prop_filter = NULL;
1656
1657     /* PulseAudio doesn't like being CloseLib'd sometimes */
1658 }
1659
1660 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type type)
1661 {
1662     if(type == ALCbackend_Playback || type == ALCbackend_Capture)
1663         return ALC_TRUE;
1664     return ALC_FALSE;
1665 }
1666
1667 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe type)
1668 {
1669     switch(type)
1670     {
1671         case ALL_DEVICE_PROBE:
1672             ALCpulsePlayback_probeDevices();
1673 #define APPEND_ALL_DEVICES_LIST(e)  AppendAllDevicesList(al_string_get_cstr((e)->name))
1674             VECTOR_FOR_EACH(const DevMap, PlaybackDevices, APPEND_ALL_DEVICES_LIST);
1675 #undef APPEND_ALL_DEVICES_LIST
1676             break;
1677
1678         case CAPTURE_DEVICE_PROBE:
1679             ALCpulseCapture_probeDevices();
1680 #define APPEND_CAPTURE_DEVICE_LIST(e) AppendCaptureDeviceList(al_string_get_cstr((e)->name))
1681             VECTOR_FOR_EACH(const DevMap, CaptureDevices, APPEND_CAPTURE_DEVICE_LIST);
1682 #undef APPEND_CAPTURE_DEVICE_LIST
1683             break;
1684     }
1685 }
1686
1687 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
1688 {
1689     if(type == ALCbackend_Playback)
1690     {
1691         ALCpulsePlayback *backend;
1692
1693         backend = ALCpulsePlayback_New(sizeof(*backend));
1694         if(!backend) return NULL;
1695         memset(backend, 0, sizeof(*backend));
1696
1697         ALCpulsePlayback_Construct(backend, device);
1698
1699         return STATIC_CAST(ALCbackend, backend);
1700     }
1701     if(type == ALCbackend_Capture)
1702     {
1703         ALCpulseCapture *backend;
1704
1705         backend = ALCpulseCapture_New(sizeof(*backend));
1706         if(!backend) return NULL;
1707         memset(backend, 0, sizeof(*backend));
1708
1709         ALCpulseCapture_Construct(backend, device);
1710
1711         return STATIC_CAST(ALCbackend, backend);
1712     }
1713
1714     return NULL;
1715 }
1716
1717
1718 #else /* PA_API_VERSION == 12 */
1719
1720 #warning "Unsupported API version, backend will be unavailable!"
1721
1722 typedef struct ALCpulseBackendFactory {
1723     DERIVE_FROM_TYPE(ALCbackendFactory);
1724 } ALCpulseBackendFactory;
1725 #define ALCPULSEBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCpulseBackendFactory, ALCbackendFactory) } }
1726
1727 static ALCboolean ALCpulseBackendFactory_init(ALCpulseBackendFactory* UNUSED(self))
1728 {
1729     return ALC_FALSE;
1730 }
1731
1732 static void ALCpulseBackendFactory_deinit(ALCpulseBackendFactory* UNUSED(self))
1733 {
1734 }
1735
1736 static ALCboolean ALCpulseBackendFactory_querySupport(ALCpulseBackendFactory* UNUSED(self), ALCbackend_Type UNUSED(type))
1737 {
1738     return ALC_FALSE;
1739 }
1740
1741 static void ALCpulseBackendFactory_probe(ALCpulseBackendFactory* UNUSED(self), enum DevProbe UNUSED(type))
1742 {
1743 }
1744
1745 static ALCbackend* ALCpulseBackendFactory_createBackend(ALCpulseBackendFactory* UNUSED(self), ALCdevice* UNUSED(device), ALCbackend_Type UNUSED(type))
1746 {
1747     return NULL;
1748 }
1749
1750 DEFINE_ALCBACKENDFACTORY_VTABLE(ALCpulseBackendFactory);
1751
1752 #endif /* PA_API_VERSION == 12 */
1753
1754 ALCbackendFactory *ALCpulseBackendFactory_getFactory(void)
1755 {
1756     static ALCpulseBackendFactory factory = ALCPULSEBACKENDFACTORY_INITIALIZER;
1757     return STATIC_CAST(ALCbackendFactory, &factory);
1758 }