Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavdevice / pulse_audio_enc.c
1 /*
2 * Copyright (c) 2013 Lukasz Marek <lukasz.m.luki@gmail.com>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <math.h>
22 #include <pulse/pulseaudio.h>
23 #include <pulse/error.h>
24 #include "libavformat/avformat.h"
25 #include "libavformat/internal.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/time.h"
28 #include "libavutil/log.h"
29 #include "libavutil/attributes.h"
30 #include "pulse_audio_common.h"
31
32 typedef struct PulseData {
33 AVClass *class;
34 const char *server;
35 const char *name;
36 const char *stream_name;
37 const char *device;
38 int64_t timestamp;
39 int buffer_size; /**< Buffer size in bytes */
40 int buffer_duration; /**< Buffer size in ms, recalculated to buffer_size */
41 int prebuf;
42 int minreq;
43 int last_result;
44 pa_threaded_mainloop *mainloop;
45 pa_context *ctx;
46 pa_stream *stream;
47 int nonblocking;
48 int mute;
49 pa_volume_t base_volume;
50 pa_volume_t last_volume;
51 } PulseData;
52
53 static void pulse_audio_sink_device_cb(pa_context *ctx, const pa_sink_info *dev,
54 int eol, void *userdata)
55 {
56 PulseData *s = userdata;
57
58 if (s->ctx != ctx)
59 return;
60
61 if (eol) {
62 pa_threaded_mainloop_signal(s->mainloop, 0);
63 } else {
64 if (dev->flags & PA_SINK_FLAT_VOLUME)
65 s->base_volume = dev->base_volume;
66 else
67 s->base_volume = PA_VOLUME_NORM;
68 av_log(s, AV_LOG_DEBUG, "base volume: %u\n", s->base_volume);
69 }
70 }
71
72 /* Mainloop must be locked before calling this function as it uses pa_threaded_mainloop_wait. */
73 static int pulse_update_sink_info(AVFormatContext *h)
74 {
75 PulseData *s = h->priv_data;
76 pa_operation *op;
77 if (!(op = pa_context_get_sink_info_by_name(s->ctx, s->device,
78 pulse_audio_sink_device_cb, s))) {
79 av_log(s, AV_LOG_ERROR, "pa_context_get_sink_info_by_name failed.\n");
80 return AVERROR_EXTERNAL;
81 }
82 while (pa_operation_get_state(op) == PA_OPERATION_RUNNING)
83 pa_threaded_mainloop_wait(s->mainloop);
84 pa_operation_unref(op);
85 return 0;
86 }
87
88 static void pulse_audio_sink_input_cb(pa_context *ctx, const pa_sink_input_info *i,
89 int eol, void *userdata)
90 {
91 AVFormatContext *h = userdata;
92 PulseData *s = h->priv_data;
93
94 if (s->ctx != ctx)
95 return;
96
97 if (!eol) {
98 double val;
99 pa_volume_t vol = pa_cvolume_avg(&i->volume);
100 if (s->mute < 0 || (s->mute && !i->mute) || (!s->mute && i->mute)) {
101 s->mute = i->mute;
102 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_MUTE_STATE_CHANGED, &s->mute, sizeof(s->mute));
103 }
104
105 vol = pa_sw_volume_divide(vol, s->base_volume);
106 if (s->last_volume != vol) {
107 val = (double)vol / PA_VOLUME_NORM;
108 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED, &val, sizeof(val));
109 s->last_volume = vol;
110 }
111 }
112 }
113
114 /* This function creates new loop so may be called from PA callbacks.
115 Mainloop must be locked before calling this function as it operates on streams. */
116 static int pulse_update_sink_input_info(AVFormatContext *h)
117 {
118 PulseData *s = h->priv_data;
119 pa_operation *op;
120 enum pa_operation_state op_state;
121 pa_mainloop *ml = NULL;
122 pa_context *ctx = NULL;
123 int ret = 0;
124
125 if ((ret = ff_pulse_audio_connect_context(&ml, &ctx, s->server, "Update sink input information")) < 0)
126 return ret;
127
128 if (!(op = pa_context_get_sink_input_info(ctx, pa_stream_get_index(s->stream),
129 pulse_audio_sink_input_cb, h))) {
130 ret = AVERROR_EXTERNAL;
131 goto fail;
132 }
133
134 while ((op_state = pa_operation_get_state(op)) == PA_OPERATION_RUNNING)
135 pa_mainloop_iterate(ml, 1, NULL);
136 pa_operation_unref(op);
137 if (op_state != PA_OPERATION_DONE) {
138 ret = AVERROR_EXTERNAL;
139 goto fail;
140 }
141
142 fail:
143 ff_pulse_audio_disconnect_context(&ml, &ctx);
144 if (ret)
145 av_log(s, AV_LOG_ERROR, "pa_context_get_sink_input_info failed.\n");
146 return ret;
147 }
148
149 static void pulse_event(pa_context *ctx, pa_subscription_event_type_t t,
150 uint32_t idx, void *userdata)
151 {
152 AVFormatContext *h = userdata;
153 PulseData *s = h->priv_data;
154
155 if (s->ctx != ctx)
156 return;
157
158 if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK_INPUT) {
159 if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_CHANGE)
160 // Calling from mainloop callback. No need to lock mainloop.
161 pulse_update_sink_input_info(h);
162 }
163 }
164
165 static void pulse_stream_writable(pa_stream *stream, size_t nbytes, void *userdata)
166 {
167 AVFormatContext *h = userdata;
168 PulseData *s = h->priv_data;
169 int64_t val = nbytes;
170
171 if (stream != s->stream)
172 return;
173
174 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &val, sizeof(val));
175 pa_threaded_mainloop_signal(s->mainloop, 0);
176 }
177
178 static void pulse_overflow(pa_stream *stream, void *userdata)
179 {
180 AVFormatContext *h = userdata;
181 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_OVERFLOW, NULL, 0);
182 }
183
184 static void pulse_underflow(pa_stream *stream, void *userdata)
185 {
186 AVFormatContext *h = userdata;
187 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_UNDERFLOW, NULL, 0);
188 }
189
190 static void pulse_stream_state(pa_stream *stream, void *userdata)
191 {
192 PulseData *s = userdata;
193
194 if (stream != s->stream)
195 return;
196
197 switch (pa_stream_get_state(s->stream)) {
198 case PA_STREAM_READY:
199 case PA_STREAM_FAILED:
200 case PA_STREAM_TERMINATED:
201 pa_threaded_mainloop_signal(s->mainloop, 0);
202 default:
203 break;
204 }
205 }
206
207 static int pulse_stream_wait(PulseData *s)
208 {
209 pa_stream_state_t state;
210
211 while ((state = pa_stream_get_state(s->stream)) != PA_STREAM_READY) {
212 if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
213 return AVERROR_EXTERNAL;
214 pa_threaded_mainloop_wait(s->mainloop);
215 }
216 return 0;
217 }
218
219 static void pulse_context_state(pa_context *ctx, void *userdata)
220 {
221 PulseData *s = userdata;
222
223 if (s->ctx != ctx)
224 return;
225
226 switch (pa_context_get_state(ctx)) {
227 case PA_CONTEXT_READY:
228 case PA_CONTEXT_FAILED:
229 case PA_CONTEXT_TERMINATED:
230 pa_threaded_mainloop_signal(s->mainloop, 0);
231 default:
232 break;
233 }
234 }
235
236 static int pulse_context_wait(PulseData *s)
237 {
238 pa_context_state_t state;
239
240 while ((state = pa_context_get_state(s->ctx)) != PA_CONTEXT_READY) {
241 if (state == PA_CONTEXT_FAILED || state == PA_CONTEXT_TERMINATED)
242 return AVERROR_EXTERNAL;
243 pa_threaded_mainloop_wait(s->mainloop);
244 }
245 return 0;
246 }
247
248 static void pulse_stream_result(pa_stream *stream, int success, void *userdata)
249 {
250 PulseData *s = userdata;
251
252 if (stream != s->stream)
253 return;
254
255 s->last_result = success ? 0 : AVERROR_EXTERNAL;
256 pa_threaded_mainloop_signal(s->mainloop, 0);
257 }
258
259 static int pulse_finish_stream_operation(PulseData *s, pa_operation *op, const char *name)
260 {
261 if (!op) {
262 pa_threaded_mainloop_unlock(s->mainloop);
263 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
264 return AVERROR_EXTERNAL;
265 }
266 s->last_result = 2;
267 while (s->last_result == 2)
268 pa_threaded_mainloop_wait(s->mainloop);
269 pa_operation_unref(op);
270 pa_threaded_mainloop_unlock(s->mainloop);
271 if (s->last_result != 0)
272 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
273 return s->last_result;
274 }
275
276 static int pulse_set_pause(PulseData *s, int pause)
277 {
278 pa_operation *op;
279 pa_threaded_mainloop_lock(s->mainloop);
280 op = pa_stream_cork(s->stream, pause, pulse_stream_result, s);
281 return pulse_finish_stream_operation(s, op, "pa_stream_cork");
282 }
283
284 static int pulse_flash_stream(PulseData *s)
285 {
286 pa_operation *op;
287 pa_threaded_mainloop_lock(s->mainloop);
288 op = pa_stream_flush(s->stream, pulse_stream_result, s);
289 return pulse_finish_stream_operation(s, op, "pa_stream_flush");
290 }
291
292 static void pulse_context_result(pa_context *ctx, int success, void *userdata)
293 {
294 PulseData *s = userdata;
295
296 if (s->ctx != ctx)
297 return;
298
299 s->last_result = success ? 0 : AVERROR_EXTERNAL;
300 pa_threaded_mainloop_signal(s->mainloop, 0);
301 }
302
303 static int pulse_finish_context_operation(PulseData *s, pa_operation *op, const char *name)
304 {
305 if (!op) {
306 pa_threaded_mainloop_unlock(s->mainloop);
307 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
308 return AVERROR_EXTERNAL;
309 }
310 s->last_result = 2;
311 while (s->last_result == 2)
312 pa_threaded_mainloop_wait(s->mainloop);
313 pa_operation_unref(op);
314 pa_threaded_mainloop_unlock(s->mainloop);
315 if (s->last_result != 0)
316 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
317 return s->last_result;
318 }
319
320 static int pulse_set_mute(PulseData *s)
321 {
322 pa_operation *op;
323 pa_threaded_mainloop_lock(s->mainloop);
324 op = pa_context_set_sink_input_mute(s->ctx, pa_stream_get_index(s->stream),
325 s->mute, pulse_context_result, s);
326 return pulse_finish_context_operation(s, op, "pa_context_set_sink_input_mute");
327 }
328
329 static int pulse_set_volume(PulseData *s, double volume)
330 {
331 pa_operation *op;
332 pa_cvolume cvol;
333 pa_volume_t vol;
334 const pa_sample_spec *ss = pa_stream_get_sample_spec(s->stream);
335
336 vol = pa_sw_volume_multiply(lround(volume * PA_VOLUME_NORM), s->base_volume);
337 pa_cvolume_set(&cvol, ss->channels, PA_VOLUME_NORM);
338 pa_sw_cvolume_multiply_scalar(&cvol, &cvol, vol);
339 pa_threaded_mainloop_lock(s->mainloop);
340 op = pa_context_set_sink_input_volume(s->ctx, pa_stream_get_index(s->stream),
341 &cvol, pulse_context_result, s);
342 return pulse_finish_context_operation(s, op, "pa_context_set_sink_input_volume");
343 }
344
345 static int pulse_subscribe_events(PulseData *s)
346 {
347 pa_operation *op;
348
349 pa_threaded_mainloop_lock(s->mainloop);
350 op = pa_context_subscribe(s->ctx, PA_SUBSCRIPTION_MASK_SINK_INPUT, pulse_context_result, s);
351 return pulse_finish_context_operation(s, op, "pa_context_subscribe");
352 }
353
354 static void pulse_map_channels_to_pulse(int64_t channel_layout, pa_channel_map *channel_map)
355 {
356 channel_map->channels = 0;
357 if (channel_layout & AV_CH_FRONT_LEFT)
358 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
359 if (channel_layout & AV_CH_FRONT_RIGHT)
360 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
361 if (channel_layout & AV_CH_FRONT_CENTER)
362 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_CENTER;
363 if (channel_layout & AV_CH_LOW_FREQUENCY)
364 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
365 if (channel_layout & AV_CH_BACK_LEFT)
366 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_LEFT;
367 if (channel_layout & AV_CH_BACK_RIGHT)
368 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_RIGHT;
369 if (channel_layout & AV_CH_FRONT_LEFT_OF_CENTER)
370 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
371 if (channel_layout & AV_CH_FRONT_RIGHT_OF_CENTER)
372 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
373 if (channel_layout & AV_CH_BACK_CENTER)
374 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_CENTER;
375 if (channel_layout & AV_CH_SIDE_LEFT)
376 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_LEFT;
377 if (channel_layout & AV_CH_SIDE_RIGHT)
378 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_RIGHT;
379 if (channel_layout & AV_CH_TOP_CENTER)
380 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_CENTER;
381 if (channel_layout & AV_CH_TOP_FRONT_LEFT)
382 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
383 if (channel_layout & AV_CH_TOP_FRONT_CENTER)
384 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
385 if (channel_layout & AV_CH_TOP_FRONT_RIGHT)
386 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
387 if (channel_layout & AV_CH_TOP_BACK_LEFT)
388 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
389 if (channel_layout & AV_CH_TOP_BACK_CENTER)
390 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
391 if (channel_layout & AV_CH_TOP_BACK_RIGHT)
392 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
393 if (channel_layout & AV_CH_STEREO_LEFT)
394 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
395 if (channel_layout & AV_CH_STEREO_RIGHT)
396 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
397 if (channel_layout & AV_CH_WIDE_LEFT)
398 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX0;
399 if (channel_layout & AV_CH_WIDE_RIGHT)
400 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX1;
401 if (channel_layout & AV_CH_SURROUND_DIRECT_LEFT)
402 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX2;
403 if (channel_layout & AV_CH_SURROUND_DIRECT_RIGHT)
404 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX3;
405 if (channel_layout & AV_CH_LOW_FREQUENCY_2)
406 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
407 }
408
409 static av_cold int pulse_write_trailer(AVFormatContext *h)
410 {
411 PulseData *s = h->priv_data;
412
413 if (s->mainloop) {
414 pa_threaded_mainloop_lock(s->mainloop);
415 if (s->stream) {
416 pa_stream_disconnect(s->stream);
417 pa_stream_set_state_callback(s->stream, NULL, NULL);
418 pa_stream_set_write_callback(s->stream, NULL, NULL);
419 pa_stream_set_overflow_callback(s->stream, NULL, NULL);
420 pa_stream_set_underflow_callback(s->stream, NULL, NULL);
421 pa_stream_unref(s->stream);
422 s->stream = NULL;
423 }
424 if (s->ctx) {
425 pa_context_disconnect(s->ctx);
426 pa_context_set_state_callback(s->ctx, NULL, NULL);
427 pa_context_set_subscribe_callback(s->ctx, NULL, NULL);
428 pa_context_unref(s->ctx);
429 s->ctx = NULL;
430 }
431 pa_threaded_mainloop_unlock(s->mainloop);
432 pa_threaded_mainloop_stop(s->mainloop);
433 pa_threaded_mainloop_free(s->mainloop);
434 s->mainloop = NULL;
435 }
436
437 return 0;
438 }
439
440 static av_cold int pulse_write_header(AVFormatContext *h)
441 {
442 PulseData *s = h->priv_data;
443 AVStream *st = NULL;
444 int ret;
445 pa_sample_spec sample_spec;
446 pa_buffer_attr buffer_attributes = { -1, -1, -1, -1, -1 };
447 pa_channel_map channel_map;
448 pa_mainloop_api *mainloop_api;
449 const char *stream_name = s->stream_name;
450 static const pa_stream_flags_t stream_flags = PA_STREAM_INTERPOLATE_TIMING |
451 PA_STREAM_AUTO_TIMING_UPDATE |
452 PA_STREAM_NOT_MONOTONIC;
453
454 if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
455 av_log(s, AV_LOG_ERROR, "Only a single audio stream is supported.\n");
456 return AVERROR(EINVAL);
457 }
458 st = h->streams[0];
459
460 if (!stream_name) {
461 if (h->filename[0])
462 stream_name = h->filename;
463 else
464 stream_name = "Playback";
465 }
466 s->nonblocking = (h->flags & AVFMT_FLAG_NONBLOCK);
467
468 if (s->buffer_duration) {
469 int64_t bytes = s->buffer_duration;
470 bytes *= st->codec->channels * st->codec->sample_rate *
471 av_get_bytes_per_sample(st->codec->sample_fmt);
472 bytes /= 1000;
473 buffer_attributes.tlength = FFMAX(s->buffer_size, av_clip64(bytes, 0, UINT32_MAX - 1));
474 av_log(s, AV_LOG_DEBUG,
475 "Buffer duration: %ums recalculated into %"PRId64" bytes buffer.\n",
476 s->buffer_duration, bytes);
477 av_log(s, AV_LOG_DEBUG, "Real buffer length is %u bytes\n", buffer_attributes.tlength);
478 } else if (s->buffer_size)
479 buffer_attributes.tlength = s->buffer_size;
480 if (s->prebuf)
481 buffer_attributes.prebuf = s->prebuf;
482 if (s->minreq)
483 buffer_attributes.minreq = s->minreq;
484
485 sample_spec.format = ff_codec_id_to_pulse_format(st->codec->codec_id);
486 sample_spec.rate = st->codec->sample_rate;
487 sample_spec.channels = st->codec->channels;
488 if (!pa_sample_spec_valid(&sample_spec)) {
489 av_log(s, AV_LOG_ERROR, "Invalid sample spec.\n");
490 return AVERROR(EINVAL);
491 }
492
493 if (sample_spec.channels == 1) {
494 channel_map.channels = 1;
495 channel_map.map[0] = PA_CHANNEL_POSITION_MONO;
496 } else if (st->codec->channel_layout) {
497 if (av_get_channel_layout_nb_channels(st->codec->channel_layout) != st->codec->channels)
498 return AVERROR(EINVAL);
499 pulse_map_channels_to_pulse(st->codec->channel_layout, &channel_map);
500 /* Unknown channel is present in channel_layout, let PulseAudio use its default. */
501 if (channel_map.channels != sample_spec.channels) {
502 av_log(s, AV_LOG_WARNING, "Unknown channel. Using defaul channel map.\n");
503 channel_map.channels = 0;
504 }
505 } else
506 channel_map.channels = 0;
507
508 if (!channel_map.channels)
509 av_log(s, AV_LOG_WARNING, "Using PulseAudio's default channel map.\n");
510 else if (!pa_channel_map_valid(&channel_map)) {
511 av_log(s, AV_LOG_ERROR, "Invalid channel map.\n");
512 return AVERROR(EINVAL);
513 }
514
515 /* start main loop */
516 s->mainloop = pa_threaded_mainloop_new();
517 if (!s->mainloop) {
518 av_log(s, AV_LOG_ERROR, "Cannot create threaded mainloop.\n");
519 return AVERROR(ENOMEM);
520 }
521 if ((ret = pa_threaded_mainloop_start(s->mainloop)) < 0) {
522 av_log(s, AV_LOG_ERROR, "Cannot start threaded mainloop: %s.\n", pa_strerror(ret));
523 pa_threaded_mainloop_free(s->mainloop);
524 s->mainloop = NULL;
525 return AVERROR_EXTERNAL;
526 }
527
528 pa_threaded_mainloop_lock(s->mainloop);
529
530 mainloop_api = pa_threaded_mainloop_get_api(s->mainloop);
531 if (!mainloop_api) {
532 av_log(s, AV_LOG_ERROR, "Cannot get mainloop API.\n");
533 ret = AVERROR_EXTERNAL;
534 goto fail;
535 }
536
537 s->ctx = pa_context_new(mainloop_api, s->name);
538 if (!s->ctx) {
539 av_log(s, AV_LOG_ERROR, "Cannot create context.\n");
540 ret = AVERROR(ENOMEM);
541 goto fail;
542 }
543 pa_context_set_state_callback(s->ctx, pulse_context_state, s);
544 pa_context_set_subscribe_callback(s->ctx, pulse_event, h);
545
546 if ((ret = pa_context_connect(s->ctx, s->server, 0, NULL)) < 0) {
547 av_log(s, AV_LOG_ERROR, "Cannot connect context: %s.\n", pa_strerror(ret));
548 ret = AVERROR_EXTERNAL;
549 goto fail;
550 }
551
552 if ((ret = pulse_context_wait(s)) < 0) {
553 av_log(s, AV_LOG_ERROR, "Context failed.\n");
554 goto fail;
555 }
556
557 s->stream = pa_stream_new(s->ctx, stream_name, &sample_spec,
558 channel_map.channels ? &channel_map : NULL);
559
560 if ((ret = pulse_update_sink_info(h)) < 0) {
561 av_log(s, AV_LOG_ERROR, "Updating sink info failed.\n");
562 goto fail;
563 }
564
565 if (!s->stream) {
566 av_log(s, AV_LOG_ERROR, "Cannot create stream.\n");
567 ret = AVERROR(ENOMEM);
568 goto fail;
569 }
570 pa_stream_set_state_callback(s->stream, pulse_stream_state, s);
571 pa_stream_set_write_callback(s->stream, pulse_stream_writable, h);
572 pa_stream_set_overflow_callback(s->stream, pulse_overflow, h);
573 pa_stream_set_underflow_callback(s->stream, pulse_underflow, h);
574
575 if ((ret = pa_stream_connect_playback(s->stream, s->device, &buffer_attributes,
576 stream_flags, NULL, NULL)) < 0) {
577 av_log(s, AV_LOG_ERROR, "pa_stream_connect_playback failed: %s.\n", pa_strerror(ret));
578 ret = AVERROR_EXTERNAL;
579 goto fail;
580 }
581
582 if ((ret = pulse_stream_wait(s)) < 0) {
583 av_log(s, AV_LOG_ERROR, "Stream failed.\n");
584 goto fail;
585 }
586
587 /* read back buffer attributes for future use */
588 buffer_attributes = *pa_stream_get_buffer_attr(s->stream);
589 s->buffer_size = buffer_attributes.tlength;
590 s->prebuf = buffer_attributes.prebuf;
591 s->minreq = buffer_attributes.minreq;
592 av_log(s, AV_LOG_DEBUG, "Real buffer attributes: size: %d, prebuf: %d, minreq: %d\n",
593 s->buffer_size, s->prebuf, s->minreq);
594
595 pa_threaded_mainloop_unlock(s->mainloop);
596
597 if ((ret = pulse_subscribe_events(s)) < 0) {
598 av_log(s, AV_LOG_ERROR, "Event subscription failed.\n");
599 /* a bit ugly but the simplest to lock here*/
600 pa_threaded_mainloop_lock(s->mainloop);
601 goto fail;
602 }
603
604 /* force control messages */
605 s->mute = -1;
606 s->last_volume = PA_VOLUME_INVALID;
607 pa_threaded_mainloop_lock(s->mainloop);
608 if ((ret = pulse_update_sink_input_info(h)) < 0) {
609 av_log(s, AV_LOG_ERROR, "Updating sink input info failed.\n");
610 goto fail;
611 }
612 pa_threaded_mainloop_unlock(s->mainloop);
613
614 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
615
616 return 0;
617 fail:
618 pa_threaded_mainloop_unlock(s->mainloop);
619 pulse_write_trailer(h);
620 return ret;
621 }
622
623 static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
624 {
625 PulseData *s = h->priv_data;
626 int ret;
627 int64_t writable_size;
628
629 if (!pkt)
630 return pulse_flash_stream(s);
631
632 if (pkt->dts != AV_NOPTS_VALUE)
633 s->timestamp = pkt->dts;
634
635 if (pkt->duration) {
636 s->timestamp += pkt->duration;
637 } else {
638 AVStream *st = h->streams[0];
639 AVCodecContext *codec_ctx = st->codec;
640 AVRational r = { 1, codec_ctx->sample_rate };
641 int64_t samples = pkt->size / (av_get_bytes_per_sample(codec_ctx->sample_fmt) * codec_ctx->channels);
642 s->timestamp += av_rescale_q(samples, r, st->time_base);
643 }
644
645 pa_threaded_mainloop_lock(s->mainloop);
646 if (!PA_STREAM_IS_GOOD(pa_stream_get_state(s->stream))) {
647 av_log(s, AV_LOG_ERROR, "PulseAudio stream is in invalid state.\n");
648 goto fail;
649 }
650 while (pa_stream_writable_size(s->stream) < s->minreq) {
651 if (s->nonblocking) {
652 pa_threaded_mainloop_unlock(s->mainloop);
653 return AVERROR(EAGAIN);
654 } else
655 pa_threaded_mainloop_wait(s->mainloop);
656 }
657
658 if ((ret = pa_stream_write(s->stream, pkt->data, pkt->size, NULL, 0, PA_SEEK_RELATIVE)) < 0) {
659 av_log(s, AV_LOG_ERROR, "pa_stream_write failed: %s\n", pa_strerror(ret));
660 goto fail;
661 }
662 if ((writable_size = pa_stream_writable_size(s->stream)) >= s->minreq)
663 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &writable_size, sizeof(writable_size));
664
665 pa_threaded_mainloop_unlock(s->mainloop);
666
667 return 0;
668 fail:
669 pa_threaded_mainloop_unlock(s->mainloop);
670 return AVERROR_EXTERNAL;
671 }
672
673 static int pulse_write_frame(AVFormatContext *h, int stream_index,
674 AVFrame **frame, unsigned flags)
675 {
676 AVPacket pkt;
677
678 /* Planar formats are not supported yet. */
679 if (flags & AV_WRITE_UNCODED_FRAME_QUERY)
680 return av_sample_fmt_is_planar(h->streams[stream_index]->codec->sample_fmt) ?
681 AVERROR(EINVAL) : 0;
682
683 pkt.data = (*frame)->data[0];
684 pkt.size = (*frame)->nb_samples * av_get_bytes_per_sample((*frame)->format) * av_frame_get_channels(*frame);
685 pkt.dts = (*frame)->pkt_dts;
686 pkt.duration = av_frame_get_pkt_duration(*frame);
687 return pulse_write_packet(h, &pkt);
688 }
689
690
691 static void pulse_get_output_timestamp(AVFormatContext *h, int stream, int64_t *dts, int64_t *wall)
692 {
693 PulseData *s = h->priv_data;
694 pa_usec_t latency;
695 int neg;
696 pa_threaded_mainloop_lock(s->mainloop);
697 pa_stream_get_latency(s->stream, &latency, &neg);
698 pa_threaded_mainloop_unlock(s->mainloop);
699 if (wall)
700 *wall = av_gettime();
701 if (dts)
702 *dts = s->timestamp - (neg ? -latency : latency);
703 }
704
705 static int pulse_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
706 {
707 PulseData *s = h->priv_data;
708 return ff_pulse_audio_get_devices(device_list, s->server, 1);
709 }
710
711 static int pulse_control_message(AVFormatContext *h, int type,
712 void *data, size_t data_size)
713 {
714 PulseData *s = h->priv_data;
715 int ret;
716
717 switch(type) {
718 case AV_APP_TO_DEV_PAUSE:
719 return pulse_set_pause(s, 1);
720 case AV_APP_TO_DEV_PLAY:
721 return pulse_set_pause(s, 0);
722 case AV_APP_TO_DEV_TOGGLE_PAUSE:
723 return pulse_set_pause(s, !pa_stream_is_corked(s->stream));
724 case AV_APP_TO_DEV_MUTE:
725 if (!s->mute) {
726 s->mute = 1;
727 return pulse_set_mute(s);
728 }
729 return 0;
730 case AV_APP_TO_DEV_UNMUTE:
731 if (s->mute) {
732 s->mute = 0;
733 return pulse_set_mute(s);
734 }
735 return 0;
736 case AV_APP_TO_DEV_TOGGLE_MUTE:
737 s->mute = !s->mute;
738 return pulse_set_mute(s);
739 case AV_APP_TO_DEV_SET_VOLUME:
740 return pulse_set_volume(s, *(double *)data);
741 case AV_APP_TO_DEV_GET_VOLUME:
742 s->last_volume = PA_VOLUME_INVALID;
743 pa_threaded_mainloop_lock(s->mainloop);
744 ret = pulse_update_sink_input_info(h);
745 pa_threaded_mainloop_unlock(s->mainloop);
746 return ret;
747 case AV_APP_TO_DEV_GET_MUTE:
748 s->mute = -1;
749 pa_threaded_mainloop_lock(s->mainloop);
750 ret = pulse_update_sink_input_info(h);
751 pa_threaded_mainloop_unlock(s->mainloop);
752 return ret;
753 default:
754 break;
755 }
756 return AVERROR(ENOSYS);
757 }
758
759 #define OFFSET(a) offsetof(PulseData, a)
760 #define E AV_OPT_FLAG_ENCODING_PARAM
761 static const AVOption options[] = {
762 { "server", "set PulseAudio server", OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
763 { "name", "set application name", OFFSET(name), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, E },
764 { "stream_name", "set stream description", OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
765 { "device", "set device name", OFFSET(device), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
766 { "buffer_size", "set buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
767 { "buffer_duration", "set buffer duration in millisecs", OFFSET(buffer_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
768 { "prebuf", "set pre-buffering size", OFFSET(prebuf), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
769 { "minreq", "set minimum request size", OFFSET(minreq), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
770 { NULL }
771 };
772
773 static const AVClass pulse_muxer_class = {
774 .class_name = "PulseAudio muxer",
775 .item_name = av_default_item_name,
776 .option = options,
777 .version = LIBAVUTIL_VERSION_INT,
778 .category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
779 };
780
781 AVOutputFormat ff_pulse_muxer = {
782 .name = "pulse",
783 .long_name = NULL_IF_CONFIG_SMALL("Pulse audio output"),
784 .priv_data_size = sizeof(PulseData),
785 .audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
786 .video_codec = AV_CODEC_ID_NONE,
787 .write_header = pulse_write_header,
788 .write_packet = pulse_write_packet,
789 .write_uncoded_frame = pulse_write_frame,
790 .write_trailer = pulse_write_trailer,
791 .get_output_timestamp = pulse_get_output_timestamp,
792 .get_device_list = pulse_get_device_list,
793 .control_message = pulse_control_message,
794 .flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
795 .priv_class = &pulse_muxer_class,
796 };