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path: root/libavdevice/pulse_audio_enc.c (plain)
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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/internal.h"
27#include "libavutil/opt.h"
28#include "libavutil/time.h"
29#include "libavutil/log.h"
30#include "libavutil/attributes.h"
31#include "pulse_audio_common.h"
32
33typedef struct PulseData {
34 AVClass *class;
35 const char *server;
36 const char *name;
37 const char *stream_name;
38 const char *device;
39 int64_t timestamp;
40 int buffer_size; /**< Buffer size in bytes */
41 int buffer_duration; /**< Buffer size in ms, recalculated to buffer_size */
42 int prebuf;
43 int minreq;
44 int last_result;
45 pa_threaded_mainloop *mainloop;
46 pa_context *ctx;
47 pa_stream *stream;
48 int nonblocking;
49 int mute;
50 pa_volume_t base_volume;
51 pa_volume_t last_volume;
52} PulseData;
53
54static void pulse_audio_sink_device_cb(pa_context *ctx, const pa_sink_info *dev,
55 int eol, void *userdata)
56{
57 PulseData *s = userdata;
58
59 if (s->ctx != ctx)
60 return;
61
62 if (eol) {
63 pa_threaded_mainloop_signal(s->mainloop, 0);
64 } else {
65 if (dev->flags & PA_SINK_FLAT_VOLUME)
66 s->base_volume = dev->base_volume;
67 else
68 s->base_volume = PA_VOLUME_NORM;
69 av_log(s, AV_LOG_DEBUG, "base volume: %u\n", s->base_volume);
70 }
71}
72
73/* Mainloop must be locked before calling this function as it uses pa_threaded_mainloop_wait. */
74static int pulse_update_sink_info(AVFormatContext *h)
75{
76 PulseData *s = h->priv_data;
77 pa_operation *op;
78 if (!(op = pa_context_get_sink_info_by_name(s->ctx, s->device,
79 pulse_audio_sink_device_cb, s))) {
80 av_log(s, AV_LOG_ERROR, "pa_context_get_sink_info_by_name failed.\n");
81 return AVERROR_EXTERNAL;
82 }
83 while (pa_operation_get_state(op) == PA_OPERATION_RUNNING)
84 pa_threaded_mainloop_wait(s->mainloop);
85 pa_operation_unref(op);
86 return 0;
87}
88
89static void pulse_audio_sink_input_cb(pa_context *ctx, const pa_sink_input_info *i,
90 int eol, void *userdata)
91{
92 AVFormatContext *h = userdata;
93 PulseData *s = h->priv_data;
94
95 if (s->ctx != ctx)
96 return;
97
98 if (!eol) {
99 double val;
100 pa_volume_t vol = pa_cvolume_avg(&i->volume);
101 if (s->mute < 0 || (s->mute && !i->mute) || (!s->mute && i->mute)) {
102 s->mute = i->mute;
103 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_MUTE_STATE_CHANGED, &s->mute, sizeof(s->mute));
104 }
105
106 vol = pa_sw_volume_divide(vol, s->base_volume);
107 if (s->last_volume != vol) {
108 val = (double)vol / PA_VOLUME_NORM;
109 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED, &val, sizeof(val));
110 s->last_volume = vol;
111 }
112 }
113}
114
115/* This function creates new loop so may be called from PA callbacks.
116 Mainloop must be locked before calling this function as it operates on streams. */
117static int pulse_update_sink_input_info(AVFormatContext *h)
118{
119 PulseData *s = h->priv_data;
120 pa_operation *op;
121 enum pa_operation_state op_state;
122 pa_mainloop *ml = NULL;
123 pa_context *ctx = NULL;
124 int ret = 0;
125
126 if ((ret = ff_pulse_audio_connect_context(&ml, &ctx, s->server, "Update sink input information")) < 0)
127 return ret;
128
129 if (!(op = pa_context_get_sink_input_info(ctx, pa_stream_get_index(s->stream),
130 pulse_audio_sink_input_cb, h))) {
131 ret = AVERROR_EXTERNAL;
132 goto fail;
133 }
134
135 while ((op_state = pa_operation_get_state(op)) == PA_OPERATION_RUNNING)
136 pa_mainloop_iterate(ml, 1, NULL);
137 pa_operation_unref(op);
138 if (op_state != PA_OPERATION_DONE) {
139 ret = AVERROR_EXTERNAL;
140 goto fail;
141 }
142
143 fail:
144 ff_pulse_audio_disconnect_context(&ml, &ctx);
145 if (ret)
146 av_log(s, AV_LOG_ERROR, "pa_context_get_sink_input_info failed.\n");
147 return ret;
148}
149
150static void pulse_event(pa_context *ctx, pa_subscription_event_type_t t,
151 uint32_t idx, void *userdata)
152{
153 AVFormatContext *h = userdata;
154 PulseData *s = h->priv_data;
155
156 if (s->ctx != ctx)
157 return;
158
159 if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK_INPUT) {
160 if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_CHANGE)
161 // Calling from mainloop callback. No need to lock mainloop.
162 pulse_update_sink_input_info(h);
163 }
164}
165
166static void pulse_stream_writable(pa_stream *stream, size_t nbytes, void *userdata)
167{
168 AVFormatContext *h = userdata;
169 PulseData *s = h->priv_data;
170 int64_t val = nbytes;
171
172 if (stream != s->stream)
173 return;
174
175 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &val, sizeof(val));
176 pa_threaded_mainloop_signal(s->mainloop, 0);
177}
178
179static void pulse_overflow(pa_stream *stream, void *userdata)
180{
181 AVFormatContext *h = userdata;
182 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_OVERFLOW, NULL, 0);
183}
184
185static void pulse_underflow(pa_stream *stream, void *userdata)
186{
187 AVFormatContext *h = userdata;
188 avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_UNDERFLOW, NULL, 0);
189}
190
191static void pulse_stream_state(pa_stream *stream, void *userdata)
192{
193 PulseData *s = userdata;
194
195 if (stream != s->stream)
196 return;
197
198 switch (pa_stream_get_state(s->stream)) {
199 case PA_STREAM_READY:
200 case PA_STREAM_FAILED:
201 case PA_STREAM_TERMINATED:
202 pa_threaded_mainloop_signal(s->mainloop, 0);
203 default:
204 break;
205 }
206}
207
208static int pulse_stream_wait(PulseData *s)
209{
210 pa_stream_state_t state;
211
212 while ((state = pa_stream_get_state(s->stream)) != PA_STREAM_READY) {
213 if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
214 return AVERROR_EXTERNAL;
215 pa_threaded_mainloop_wait(s->mainloop);
216 }
217 return 0;
218}
219
220static void pulse_context_state(pa_context *ctx, void *userdata)
221{
222 PulseData *s = userdata;
223
224 if (s->ctx != ctx)
225 return;
226
227 switch (pa_context_get_state(ctx)) {
228 case PA_CONTEXT_READY:
229 case PA_CONTEXT_FAILED:
230 case PA_CONTEXT_TERMINATED:
231 pa_threaded_mainloop_signal(s->mainloop, 0);
232 default:
233 break;
234 }
235}
236
237static int pulse_context_wait(PulseData *s)
238{
239 pa_context_state_t state;
240
241 while ((state = pa_context_get_state(s->ctx)) != PA_CONTEXT_READY) {
242 if (state == PA_CONTEXT_FAILED || state == PA_CONTEXT_TERMINATED)
243 return AVERROR_EXTERNAL;
244 pa_threaded_mainloop_wait(s->mainloop);
245 }
246 return 0;
247}
248
249static void pulse_stream_result(pa_stream *stream, int success, void *userdata)
250{
251 PulseData *s = userdata;
252
253 if (stream != s->stream)
254 return;
255
256 s->last_result = success ? 0 : AVERROR_EXTERNAL;
257 pa_threaded_mainloop_signal(s->mainloop, 0);
258}
259
260static int pulse_finish_stream_operation(PulseData *s, pa_operation *op, const char *name)
261{
262 if (!op) {
263 pa_threaded_mainloop_unlock(s->mainloop);
264 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
265 return AVERROR_EXTERNAL;
266 }
267 s->last_result = 2;
268 while (s->last_result == 2)
269 pa_threaded_mainloop_wait(s->mainloop);
270 pa_operation_unref(op);
271 pa_threaded_mainloop_unlock(s->mainloop);
272 if (s->last_result != 0)
273 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
274 return s->last_result;
275}
276
277static int pulse_set_pause(PulseData *s, int pause)
278{
279 pa_operation *op;
280 pa_threaded_mainloop_lock(s->mainloop);
281 op = pa_stream_cork(s->stream, pause, pulse_stream_result, s);
282 return pulse_finish_stream_operation(s, op, "pa_stream_cork");
283}
284
285static int pulse_flash_stream(PulseData *s)
286{
287 pa_operation *op;
288 pa_threaded_mainloop_lock(s->mainloop);
289 op = pa_stream_flush(s->stream, pulse_stream_result, s);
290 return pulse_finish_stream_operation(s, op, "pa_stream_flush");
291}
292
293static void pulse_context_result(pa_context *ctx, int success, void *userdata)
294{
295 PulseData *s = userdata;
296
297 if (s->ctx != ctx)
298 return;
299
300 s->last_result = success ? 0 : AVERROR_EXTERNAL;
301 pa_threaded_mainloop_signal(s->mainloop, 0);
302}
303
304static int pulse_finish_context_operation(PulseData *s, pa_operation *op, const char *name)
305{
306 if (!op) {
307 pa_threaded_mainloop_unlock(s->mainloop);
308 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
309 return AVERROR_EXTERNAL;
310 }
311 s->last_result = 2;
312 while (s->last_result == 2)
313 pa_threaded_mainloop_wait(s->mainloop);
314 pa_operation_unref(op);
315 pa_threaded_mainloop_unlock(s->mainloop);
316 if (s->last_result != 0)
317 av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
318 return s->last_result;
319}
320
321static int pulse_set_mute(PulseData *s)
322{
323 pa_operation *op;
324 pa_threaded_mainloop_lock(s->mainloop);
325 op = pa_context_set_sink_input_mute(s->ctx, pa_stream_get_index(s->stream),
326 s->mute, pulse_context_result, s);
327 return pulse_finish_context_operation(s, op, "pa_context_set_sink_input_mute");
328}
329
330static int pulse_set_volume(PulseData *s, double volume)
331{
332 pa_operation *op;
333 pa_cvolume cvol;
334 pa_volume_t vol;
335 const pa_sample_spec *ss = pa_stream_get_sample_spec(s->stream);
336
337 vol = pa_sw_volume_multiply(lrint(volume * PA_VOLUME_NORM), s->base_volume);
338 pa_cvolume_set(&cvol, ss->channels, PA_VOLUME_NORM);
339 pa_sw_cvolume_multiply_scalar(&cvol, &cvol, vol);
340 pa_threaded_mainloop_lock(s->mainloop);
341 op = pa_context_set_sink_input_volume(s->ctx, pa_stream_get_index(s->stream),
342 &cvol, pulse_context_result, s);
343 return pulse_finish_context_operation(s, op, "pa_context_set_sink_input_volume");
344}
345
346static int pulse_subscribe_events(PulseData *s)
347{
348 pa_operation *op;
349
350 pa_threaded_mainloop_lock(s->mainloop);
351 op = pa_context_subscribe(s->ctx, PA_SUBSCRIPTION_MASK_SINK_INPUT, pulse_context_result, s);
352 return pulse_finish_context_operation(s, op, "pa_context_subscribe");
353}
354
355static void pulse_map_channels_to_pulse(int64_t channel_layout, pa_channel_map *channel_map)
356{
357 channel_map->channels = 0;
358 if (channel_layout & AV_CH_FRONT_LEFT)
359 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
360 if (channel_layout & AV_CH_FRONT_RIGHT)
361 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
362 if (channel_layout & AV_CH_FRONT_CENTER)
363 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_CENTER;
364 if (channel_layout & AV_CH_LOW_FREQUENCY)
365 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
366 if (channel_layout & AV_CH_BACK_LEFT)
367 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_LEFT;
368 if (channel_layout & AV_CH_BACK_RIGHT)
369 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_RIGHT;
370 if (channel_layout & AV_CH_FRONT_LEFT_OF_CENTER)
371 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
372 if (channel_layout & AV_CH_FRONT_RIGHT_OF_CENTER)
373 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
374 if (channel_layout & AV_CH_BACK_CENTER)
375 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_CENTER;
376 if (channel_layout & AV_CH_SIDE_LEFT)
377 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_LEFT;
378 if (channel_layout & AV_CH_SIDE_RIGHT)
379 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_RIGHT;
380 if (channel_layout & AV_CH_TOP_CENTER)
381 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_CENTER;
382 if (channel_layout & AV_CH_TOP_FRONT_LEFT)
383 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
384 if (channel_layout & AV_CH_TOP_FRONT_CENTER)
385 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
386 if (channel_layout & AV_CH_TOP_FRONT_RIGHT)
387 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
388 if (channel_layout & AV_CH_TOP_BACK_LEFT)
389 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
390 if (channel_layout & AV_CH_TOP_BACK_CENTER)
391 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
392 if (channel_layout & AV_CH_TOP_BACK_RIGHT)
393 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
394 if (channel_layout & AV_CH_STEREO_LEFT)
395 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
396 if (channel_layout & AV_CH_STEREO_RIGHT)
397 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
398 if (channel_layout & AV_CH_WIDE_LEFT)
399 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX0;
400 if (channel_layout & AV_CH_WIDE_RIGHT)
401 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX1;
402 if (channel_layout & AV_CH_SURROUND_DIRECT_LEFT)
403 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX2;
404 if (channel_layout & AV_CH_SURROUND_DIRECT_RIGHT)
405 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX3;
406 if (channel_layout & AV_CH_LOW_FREQUENCY_2)
407 channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
408}
409
410static av_cold int pulse_write_trailer(AVFormatContext *h)
411{
412 PulseData *s = h->priv_data;
413
414 if (s->mainloop) {
415 pa_threaded_mainloop_lock(s->mainloop);
416 if (s->stream) {
417 pa_stream_disconnect(s->stream);
418 pa_stream_set_state_callback(s->stream, NULL, NULL);
419 pa_stream_set_write_callback(s->stream, NULL, NULL);
420 pa_stream_set_overflow_callback(s->stream, NULL, NULL);
421 pa_stream_set_underflow_callback(s->stream, NULL, NULL);
422 pa_stream_unref(s->stream);
423 s->stream = NULL;
424 }
425 if (s->ctx) {
426 pa_context_disconnect(s->ctx);
427 pa_context_set_state_callback(s->ctx, NULL, NULL);
428 pa_context_set_subscribe_callback(s->ctx, NULL, NULL);
429 pa_context_unref(s->ctx);
430 s->ctx = NULL;
431 }
432 pa_threaded_mainloop_unlock(s->mainloop);
433 pa_threaded_mainloop_stop(s->mainloop);
434 pa_threaded_mainloop_free(s->mainloop);
435 s->mainloop = NULL;
436 }
437
438 return 0;
439}
440
441static av_cold int pulse_write_header(AVFormatContext *h)
442{
443 PulseData *s = h->priv_data;
444 AVStream *st = NULL;
445 int ret;
446 pa_sample_spec sample_spec;
447 pa_buffer_attr buffer_attributes = { -1, -1, -1, -1, -1 };
448 pa_channel_map channel_map;
449 pa_mainloop_api *mainloop_api;
450 const char *stream_name = s->stream_name;
451 static const pa_stream_flags_t stream_flags = PA_STREAM_INTERPOLATE_TIMING |
452 PA_STREAM_AUTO_TIMING_UPDATE |
453 PA_STREAM_NOT_MONOTONIC;
454
455 if (h->nb_streams != 1 || h->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
456 av_log(s, AV_LOG_ERROR, "Only a single audio stream is supported.\n");
457 return AVERROR(EINVAL);
458 }
459 st = h->streams[0];
460
461 if (!stream_name) {
462 if (h->filename[0])
463 stream_name = h->filename;
464 else
465 stream_name = "Playback";
466 }
467 s->nonblocking = (h->flags & AVFMT_FLAG_NONBLOCK);
468
469 if (s->buffer_duration) {
470 int64_t bytes = s->buffer_duration;
471 bytes *= st->codecpar->channels * st->codecpar->sample_rate *
472 av_get_bytes_per_sample(st->codecpar->format);
473 bytes /= 1000;
474 buffer_attributes.tlength = FFMAX(s->buffer_size, av_clip64(bytes, 0, UINT32_MAX - 1));
475 av_log(s, AV_LOG_DEBUG,
476 "Buffer duration: %ums recalculated into %"PRId64" bytes buffer.\n",
477 s->buffer_duration, bytes);
478 av_log(s, AV_LOG_DEBUG, "Real buffer length is %u bytes\n", buffer_attributes.tlength);
479 } else if (s->buffer_size)
480 buffer_attributes.tlength = s->buffer_size;
481 if (s->prebuf)
482 buffer_attributes.prebuf = s->prebuf;
483 if (s->minreq)
484 buffer_attributes.minreq = s->minreq;
485
486 sample_spec.format = ff_codec_id_to_pulse_format(st->codecpar->codec_id);
487 sample_spec.rate = st->codecpar->sample_rate;
488 sample_spec.channels = st->codecpar->channels;
489 if (!pa_sample_spec_valid(&sample_spec)) {
490 av_log(s, AV_LOG_ERROR, "Invalid sample spec.\n");
491 return AVERROR(EINVAL);
492 }
493
494 if (sample_spec.channels == 1) {
495 channel_map.channels = 1;
496 channel_map.map[0] = PA_CHANNEL_POSITION_MONO;
497 } else if (st->codecpar->channel_layout) {
498 if (av_get_channel_layout_nb_channels(st->codecpar->channel_layout) != st->codecpar->channels)
499 return AVERROR(EINVAL);
500 pulse_map_channels_to_pulse(st->codecpar->channel_layout, &channel_map);
501 /* Unknown channel is present in channel_layout, let PulseAudio use its default. */
502 if (channel_map.channels != sample_spec.channels) {
503 av_log(s, AV_LOG_WARNING, "Unknown channel. Using defaul channel map.\n");
504 channel_map.channels = 0;
505 }
506 } else
507 channel_map.channels = 0;
508
509 if (!channel_map.channels)
510 av_log(s, AV_LOG_WARNING, "Using PulseAudio's default channel map.\n");
511 else if (!pa_channel_map_valid(&channel_map)) {
512 av_log(s, AV_LOG_ERROR, "Invalid channel map.\n");
513 return AVERROR(EINVAL);
514 }
515
516 /* start main loop */
517 s->mainloop = pa_threaded_mainloop_new();
518 if (!s->mainloop) {
519 av_log(s, AV_LOG_ERROR, "Cannot create threaded mainloop.\n");
520 return AVERROR(ENOMEM);
521 }
522 if ((ret = pa_threaded_mainloop_start(s->mainloop)) < 0) {
523 av_log(s, AV_LOG_ERROR, "Cannot start threaded mainloop: %s.\n", pa_strerror(ret));
524 pa_threaded_mainloop_free(s->mainloop);
525 s->mainloop = NULL;
526 return AVERROR_EXTERNAL;
527 }
528
529 pa_threaded_mainloop_lock(s->mainloop);
530
531 mainloop_api = pa_threaded_mainloop_get_api(s->mainloop);
532 if (!mainloop_api) {
533 av_log(s, AV_LOG_ERROR, "Cannot get mainloop API.\n");
534 ret = AVERROR_EXTERNAL;
535 goto fail;
536 }
537
538 s->ctx = pa_context_new(mainloop_api, s->name);
539 if (!s->ctx) {
540 av_log(s, AV_LOG_ERROR, "Cannot create context.\n");
541 ret = AVERROR(ENOMEM);
542 goto fail;
543 }
544 pa_context_set_state_callback(s->ctx, pulse_context_state, s);
545 pa_context_set_subscribe_callback(s->ctx, pulse_event, h);
546
547 if ((ret = pa_context_connect(s->ctx, s->server, 0, NULL)) < 0) {
548 av_log(s, AV_LOG_ERROR, "Cannot connect context: %s.\n", pa_strerror(ret));
549 ret = AVERROR_EXTERNAL;
550 goto fail;
551 }
552
553 if ((ret = pulse_context_wait(s)) < 0) {
554 av_log(s, AV_LOG_ERROR, "Context failed.\n");
555 goto fail;
556 }
557
558 s->stream = pa_stream_new(s->ctx, stream_name, &sample_spec,
559 channel_map.channels ? &channel_map : NULL);
560
561 if ((ret = pulse_update_sink_info(h)) < 0) {
562 av_log(s, AV_LOG_ERROR, "Updating sink info failed.\n");
563 goto fail;
564 }
565
566 if (!s->stream) {
567 av_log(s, AV_LOG_ERROR, "Cannot create stream.\n");
568 ret = AVERROR(ENOMEM);
569 goto fail;
570 }
571 pa_stream_set_state_callback(s->stream, pulse_stream_state, s);
572 pa_stream_set_write_callback(s->stream, pulse_stream_writable, h);
573 pa_stream_set_overflow_callback(s->stream, pulse_overflow, h);
574 pa_stream_set_underflow_callback(s->stream, pulse_underflow, h);
575
576 if ((ret = pa_stream_connect_playback(s->stream, s->device, &buffer_attributes,
577 stream_flags, NULL, NULL)) < 0) {
578 av_log(s, AV_LOG_ERROR, "pa_stream_connect_playback failed: %s.\n", pa_strerror(ret));
579 ret = AVERROR_EXTERNAL;
580 goto fail;
581 }
582
583 if ((ret = pulse_stream_wait(s)) < 0) {
584 av_log(s, AV_LOG_ERROR, "Stream failed.\n");
585 goto fail;
586 }
587
588 /* read back buffer attributes for future use */
589 buffer_attributes = *pa_stream_get_buffer_attr(s->stream);
590 s->buffer_size = buffer_attributes.tlength;
591 s->prebuf = buffer_attributes.prebuf;
592 s->minreq = buffer_attributes.minreq;
593 av_log(s, AV_LOG_DEBUG, "Real buffer attributes: size: %d, prebuf: %d, minreq: %d\n",
594 s->buffer_size, s->prebuf, s->minreq);
595
596 pa_threaded_mainloop_unlock(s->mainloop);
597
598 if ((ret = pulse_subscribe_events(s)) < 0) {
599 av_log(s, AV_LOG_ERROR, "Event subscription failed.\n");
600 /* a bit ugly but the simplest to lock here*/
601 pa_threaded_mainloop_lock(s->mainloop);
602 goto fail;
603 }
604
605 /* force control messages */
606 s->mute = -1;
607 s->last_volume = PA_VOLUME_INVALID;
608 pa_threaded_mainloop_lock(s->mainloop);
609 if ((ret = pulse_update_sink_input_info(h)) < 0) {
610 av_log(s, AV_LOG_ERROR, "Updating sink input info failed.\n");
611 goto fail;
612 }
613 pa_threaded_mainloop_unlock(s->mainloop);
614
615 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
616
617 return 0;
618 fail:
619 pa_threaded_mainloop_unlock(s->mainloop);
620 pulse_write_trailer(h);
621 return ret;
622}
623
624static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
625{
626 PulseData *s = h->priv_data;
627 int ret;
628 int64_t writable_size;
629
630 if (!pkt)
631 return pulse_flash_stream(s);
632
633 if (pkt->dts != AV_NOPTS_VALUE)
634 s->timestamp = pkt->dts;
635
636 if (pkt->duration) {
637 s->timestamp += pkt->duration;
638 } else {
639 AVStream *st = h->streams[0];
640 AVRational r = { 1, st->codecpar->sample_rate };
641 int64_t samples = pkt->size / (av_get_bytes_per_sample(st->codecpar->format) * st->codecpar->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
673static 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]->codecpar->format) ?
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
691static 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
705static 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
711static 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
761static 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
773static 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
781AVOutputFormat 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};
797
generated by cgit at 2024-05-18 04:42:37 (GMT)