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FFmpeg/libavdevice/pulse_audio_enc.c
Andreas Rheinhardt 0c6e5f321b avformat/avformat: Avoid including codec.h, frame.h 
AVCodec is only ever used as an incomplete type (i.e. via a pointer
to an AVCodec) in avformat.h and it is not really part of the core
of avformat.h or libavformat; almost none of our internal users
make use of it (and none make use of hwcontext.h, which is implicitly
included). So switch to use struct AVCodec, but continue to include
codec.h for external users for compatibility.

Also, do the same for AVFrame and frame.h, which is implicitly included
by codec.h (via lavu/hwcontext.h).

Also, remove an unnecessary inclusion of <time.h>.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-09-07 00:30:08 +02:00

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/*
* Copyright (c) 2013 Lukasz Marek <lukasz.m.luki@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <math.h>
#include <pulse/pulseaudio.h>
#include <pulse/error.h>
#include "libavformat/avformat.h"
#include "libavformat/internal.h"
#include "libavformat/mux.h"
#include "libavformat/version.h"
#include "libavutil/channel_layout.h"
#include "libavutil/frame.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "libavutil/log.h"
#include "libavutil/attributes.h"
#include "pulse_audio_common.h"
typedef struct PulseData {
AVClass *class;
const char *server;
const char *name;
const char *stream_name;
const char *device;
int64_t timestamp;
int buffer_size; /**< Buffer size in bytes */
int buffer_duration; /**< Buffer size in ms, recalculated to buffer_size */
int prebuf;
int minreq;
int last_result;
pa_threaded_mainloop *mainloop;
pa_context *ctx;
pa_stream *stream;
int nonblocking;
int mute;
pa_volume_t base_volume;
pa_volume_t last_volume;
} PulseData;
static void pulse_audio_sink_device_cb(pa_context *ctx, const pa_sink_info *dev,
int eol, void *userdata)
{
PulseData *s = userdata;
if (s->ctx != ctx)
return;
if (eol) {
pa_threaded_mainloop_signal(s->mainloop, 0);
} else {
if (dev->flags & PA_SINK_FLAT_VOLUME)
s->base_volume = dev->base_volume;
else
s->base_volume = PA_VOLUME_NORM;
av_log(s, AV_LOG_DEBUG, "base volume: %u\n", s->base_volume);
}
}
/* Mainloop must be locked before calling this function as it uses pa_threaded_mainloop_wait. */
static int pulse_update_sink_info(AVFormatContext *h)
{
PulseData *s = h->priv_data;
pa_operation *op;
if (!(op = pa_context_get_sink_info_by_name(s->ctx, s->device,
pulse_audio_sink_device_cb, s))) {
av_log(s, AV_LOG_ERROR, "pa_context_get_sink_info_by_name failed.\n");
return AVERROR_EXTERNAL;
}
while (pa_operation_get_state(op) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(s->mainloop);
pa_operation_unref(op);
return 0;
}
static void pulse_audio_sink_input_cb(pa_context *ctx, const pa_sink_input_info *i,
int eol, void *userdata)
{
AVFormatContext *h = userdata;
PulseData *s = h->priv_data;
if (s->ctx != ctx)
return;
if (!eol) {
double val;
pa_volume_t vol = pa_cvolume_avg(&i->volume);
if (s->mute < 0 || (s->mute && !i->mute) || (!s->mute && i->mute)) {
s->mute = i->mute;
avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_MUTE_STATE_CHANGED, &s->mute, sizeof(s->mute));
}
vol = pa_sw_volume_divide(vol, s->base_volume);
if (s->last_volume != vol) {
val = (double)vol / PA_VOLUME_NORM;
avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED, &val, sizeof(val));
s->last_volume = vol;
}
}
}
/* This function creates new loop so may be called from PA callbacks.
Mainloop must be locked before calling this function as it operates on streams. */
static int pulse_update_sink_input_info(AVFormatContext *h)
{
PulseData *s = h->priv_data;
pa_operation *op;
enum pa_operation_state op_state;
pa_mainloop *ml = NULL;
pa_context *ctx = NULL;
int ret = 0;
if ((ret = ff_pulse_audio_connect_context(&ml, &ctx, s->server, "Update sink input information")) < 0)
return ret;
if (!(op = pa_context_get_sink_input_info(ctx, pa_stream_get_index(s->stream),
pulse_audio_sink_input_cb, h))) {
ret = AVERROR_EXTERNAL;
goto fail;
}
while ((op_state = pa_operation_get_state(op)) == PA_OPERATION_RUNNING)
pa_mainloop_iterate(ml, 1, NULL);
pa_operation_unref(op);
if (op_state != PA_OPERATION_DONE) {
ret = AVERROR_EXTERNAL;
goto fail;
}
fail:
ff_pulse_audio_disconnect_context(&ml, &ctx);
if (ret)
av_log(s, AV_LOG_ERROR, "pa_context_get_sink_input_info failed.\n");
return ret;
}
static void pulse_event(pa_context *ctx, pa_subscription_event_type_t t,
uint32_t idx, void *userdata)
{
AVFormatContext *h = userdata;
PulseData *s = h->priv_data;
if (s->ctx != ctx)
return;
if ((t & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) == PA_SUBSCRIPTION_EVENT_SINK_INPUT) {
if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) == PA_SUBSCRIPTION_EVENT_CHANGE)
// Calling from mainloop callback. No need to lock mainloop.
pulse_update_sink_input_info(h);
}
}
static void pulse_stream_writable(pa_stream *stream, size_t nbytes, void *userdata)
{
AVFormatContext *h = userdata;
PulseData *s = h->priv_data;
int64_t val = nbytes;
if (stream != s->stream)
return;
avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &val, sizeof(val));
pa_threaded_mainloop_signal(s->mainloop, 0);
}
static void pulse_overflow(pa_stream *stream, void *userdata)
{
AVFormatContext *h = userdata;
avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_OVERFLOW, NULL, 0);
}
static void pulse_underflow(pa_stream *stream, void *userdata)
{
AVFormatContext *h = userdata;
avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_UNDERFLOW, NULL, 0);
}
static void pulse_stream_state(pa_stream *stream, void *userdata)
{
PulseData *s = userdata;
if (stream != s->stream)
return;
switch (pa_stream_get_state(s->stream)) {
case PA_STREAM_READY:
case PA_STREAM_FAILED:
case PA_STREAM_TERMINATED:
pa_threaded_mainloop_signal(s->mainloop, 0);
default:
break;
}
}
static int pulse_stream_wait(PulseData *s)
{
pa_stream_state_t state;
while ((state = pa_stream_get_state(s->stream)) != PA_STREAM_READY) {
if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
return AVERROR_EXTERNAL;
pa_threaded_mainloop_wait(s->mainloop);
}
return 0;
}
static void pulse_context_state(pa_context *ctx, void *userdata)
{
PulseData *s = userdata;
if (s->ctx != ctx)
return;
switch (pa_context_get_state(ctx)) {
case PA_CONTEXT_READY:
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
pa_threaded_mainloop_signal(s->mainloop, 0);
default:
break;
}
}
static int pulse_context_wait(PulseData *s)
{
pa_context_state_t state;
while ((state = pa_context_get_state(s->ctx)) != PA_CONTEXT_READY) {
if (state == PA_CONTEXT_FAILED || state == PA_CONTEXT_TERMINATED)
return AVERROR_EXTERNAL;
pa_threaded_mainloop_wait(s->mainloop);
}
return 0;
}
static void pulse_stream_result(pa_stream *stream, int success, void *userdata)
{
PulseData *s = userdata;
if (stream != s->stream)
return;
s->last_result = success ? 0 : AVERROR_EXTERNAL;
pa_threaded_mainloop_signal(s->mainloop, 0);
}
static int pulse_finish_stream_operation(PulseData *s, pa_operation *op, const char *name)
{
if (!op) {
pa_threaded_mainloop_unlock(s->mainloop);
av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
return AVERROR_EXTERNAL;
}
s->last_result = 2;
while (s->last_result == 2)
pa_threaded_mainloop_wait(s->mainloop);
pa_operation_unref(op);
pa_threaded_mainloop_unlock(s->mainloop);
if (s->last_result != 0)
av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
return s->last_result;
}
static int pulse_set_pause(PulseData *s, int pause)
{
pa_operation *op;
pa_threaded_mainloop_lock(s->mainloop);
op = pa_stream_cork(s->stream, pause, pulse_stream_result, s);
return pulse_finish_stream_operation(s, op, "pa_stream_cork");
}
static int pulse_flash_stream(PulseData *s)
{
pa_operation *op;
pa_threaded_mainloop_lock(s->mainloop);
op = pa_stream_flush(s->stream, pulse_stream_result, s);
return pulse_finish_stream_operation(s, op, "pa_stream_flush");
}
static void pulse_context_result(pa_context *ctx, int success, void *userdata)
{
PulseData *s = userdata;
if (s->ctx != ctx)
return;
s->last_result = success ? 0 : AVERROR_EXTERNAL;
pa_threaded_mainloop_signal(s->mainloop, 0);
}
static int pulse_finish_context_operation(PulseData *s, pa_operation *op, const char *name)
{
if (!op) {
pa_threaded_mainloop_unlock(s->mainloop);
av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
return AVERROR_EXTERNAL;
}
s->last_result = 2;
while (s->last_result == 2)
pa_threaded_mainloop_wait(s->mainloop);
pa_operation_unref(op);
pa_threaded_mainloop_unlock(s->mainloop);
if (s->last_result != 0)
av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
return s->last_result;
}
static int pulse_set_mute(PulseData *s)
{
pa_operation *op;
pa_threaded_mainloop_lock(s->mainloop);
op = pa_context_set_sink_input_mute(s->ctx, pa_stream_get_index(s->stream),
s->mute, pulse_context_result, s);
return pulse_finish_context_operation(s, op, "pa_context_set_sink_input_mute");
}
static int pulse_set_volume(PulseData *s, double volume)
{
pa_operation *op;
pa_cvolume cvol;
pa_volume_t vol;
const pa_sample_spec *ss = pa_stream_get_sample_spec(s->stream);
vol = pa_sw_volume_multiply(lrint(volume * PA_VOLUME_NORM), s->base_volume);
pa_cvolume_set(&cvol, ss->channels, PA_VOLUME_NORM);
pa_sw_cvolume_multiply_scalar(&cvol, &cvol, vol);
pa_threaded_mainloop_lock(s->mainloop);
op = pa_context_set_sink_input_volume(s->ctx, pa_stream_get_index(s->stream),
&cvol, pulse_context_result, s);
return pulse_finish_context_operation(s, op, "pa_context_set_sink_input_volume");
}
static int pulse_subscribe_events(PulseData *s)
{
pa_operation *op;
pa_threaded_mainloop_lock(s->mainloop);
op = pa_context_subscribe(s->ctx, PA_SUBSCRIPTION_MASK_SINK_INPUT, pulse_context_result, s);
return pulse_finish_context_operation(s, op, "pa_context_subscribe");
}
static void pulse_map_channels_to_pulse(const AVChannelLayout *channel_layout, pa_channel_map *channel_map)
{
channel_map->channels = 0;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_FRONT_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_FRONT_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_FRONT_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_LOW_FREQUENCY) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_BACK_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_LEFT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_BACK_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_RIGHT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_FRONT_LEFT_OF_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_FRONT_RIGHT_OF_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_BACK_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_SIDE_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_LEFT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_SIDE_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_RIGHT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_FRONT_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_FRONT_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_FRONT_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_BACK_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_BACK_CENTER) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_TOP_BACK_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_STEREO_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_STEREO_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_WIDE_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX0;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_WIDE_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX1;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_SURROUND_DIRECT_LEFT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX2;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_SURROUND_DIRECT_RIGHT) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX3;
if (av_channel_layout_index_from_channel(channel_layout, AV_CHAN_LOW_FREQUENCY_2) >= 0)
channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
}
static av_cold int pulse_write_trailer(AVFormatContext *h)
{
PulseData *s = h->priv_data;
if (s->mainloop) {
pa_threaded_mainloop_lock(s->mainloop);
if (s->stream) {
pa_stream_disconnect(s->stream);
pa_stream_set_state_callback(s->stream, NULL, NULL);
pa_stream_set_write_callback(s->stream, NULL, NULL);
pa_stream_set_overflow_callback(s->stream, NULL, NULL);
pa_stream_set_underflow_callback(s->stream, NULL, NULL);
pa_stream_unref(s->stream);
s->stream = NULL;
}
if (s->ctx) {
pa_context_disconnect(s->ctx);
pa_context_set_state_callback(s->ctx, NULL, NULL);
pa_context_set_subscribe_callback(s->ctx, NULL, NULL);
pa_context_unref(s->ctx);
s->ctx = NULL;
}
pa_threaded_mainloop_unlock(s->mainloop);
pa_threaded_mainloop_stop(s->mainloop);
pa_threaded_mainloop_free(s->mainloop);
s->mainloop = NULL;
}
return 0;
}
static av_cold int pulse_write_header(AVFormatContext *h)
{
PulseData *s = h->priv_data;
AVStream *st = NULL;
int ret;
pa_sample_spec sample_spec;
pa_buffer_attr buffer_attributes = { -1, -1, -1, -1, -1 };
pa_channel_map channel_map;
pa_mainloop_api *mainloop_api;
const char *stream_name = s->stream_name;
static const pa_stream_flags_t stream_flags = PA_STREAM_INTERPOLATE_TIMING |
PA_STREAM_AUTO_TIMING_UPDATE |
PA_STREAM_NOT_MONOTONIC;
if (h->nb_streams != 1 || h->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
av_log(s, AV_LOG_ERROR, "Only a single audio stream is supported.\n");
return AVERROR(EINVAL);
}
st = h->streams[0];
if (!stream_name) {
if (h->url[0])
stream_name = h->url;
else
stream_name = "Playback";
}
s->nonblocking = (h->flags & AVFMT_FLAG_NONBLOCK);
if (s->buffer_duration) {
int64_t bytes = s->buffer_duration;
bytes *= st->codecpar->ch_layout.nb_channels * st->codecpar->sample_rate *
av_get_bytes_per_sample(st->codecpar->format);
bytes /= 1000;
buffer_attributes.tlength = FFMAX(s->buffer_size, av_clip64(bytes, 0, UINT32_MAX - 1));
av_log(s, AV_LOG_DEBUG,
"Buffer duration: %ums recalculated into %"PRId64" bytes buffer.\n",
s->buffer_duration, bytes);
av_log(s, AV_LOG_DEBUG, "Real buffer length is %u bytes\n", buffer_attributes.tlength);
} else if (s->buffer_size)
buffer_attributes.tlength = s->buffer_size;
if (s->prebuf)
buffer_attributes.prebuf = s->prebuf;
if (s->minreq)
buffer_attributes.minreq = s->minreq;
sample_spec.format = ff_codec_id_to_pulse_format(st->codecpar->codec_id);
sample_spec.rate = st->codecpar->sample_rate;
sample_spec.channels = st->codecpar->ch_layout.nb_channels;
if (!pa_sample_spec_valid(&sample_spec)) {
av_log(s, AV_LOG_ERROR, "Invalid sample spec.\n");
return AVERROR(EINVAL);
}
if (sample_spec.channels == 1) {
channel_map.channels = 1;
channel_map.map[0] = PA_CHANNEL_POSITION_MONO;
} else if (st->codecpar->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC) {
if (!av_channel_layout_check(&st->codecpar->ch_layout))
return AVERROR(EINVAL);
pulse_map_channels_to_pulse(&st->codecpar->ch_layout, &channel_map);
/* Unknown channel is present in channel_layout, let PulseAudio use its default. */
if (channel_map.channels != sample_spec.channels) {
av_log(s, AV_LOG_WARNING, "Unknown channel. Using defaul channel map.\n");
channel_map.channels = 0;
}
} else
channel_map.channels = 0;
if (!channel_map.channels)
av_log(s, AV_LOG_WARNING, "Using PulseAudio's default channel map.\n");
else if (!pa_channel_map_valid(&channel_map)) {
av_log(s, AV_LOG_ERROR, "Invalid channel map.\n");
return AVERROR(EINVAL);
}
/* start main loop */
s->mainloop = pa_threaded_mainloop_new();
if (!s->mainloop) {
av_log(s, AV_LOG_ERROR, "Cannot create threaded mainloop.\n");
return AVERROR(ENOMEM);
}
if ((ret = pa_threaded_mainloop_start(s->mainloop)) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot start threaded mainloop: %s.\n", pa_strerror(ret));
pa_threaded_mainloop_free(s->mainloop);
s->mainloop = NULL;
return AVERROR_EXTERNAL;
}
pa_threaded_mainloop_lock(s->mainloop);
mainloop_api = pa_threaded_mainloop_get_api(s->mainloop);
if (!mainloop_api) {
av_log(s, AV_LOG_ERROR, "Cannot get mainloop API.\n");
ret = AVERROR_EXTERNAL;
goto fail;
}
s->ctx = pa_context_new(mainloop_api, s->name);
if (!s->ctx) {
av_log(s, AV_LOG_ERROR, "Cannot create context.\n");
ret = AVERROR(ENOMEM);
goto fail;
}
pa_context_set_state_callback(s->ctx, pulse_context_state, s);
pa_context_set_subscribe_callback(s->ctx, pulse_event, h);
if ((ret = pa_context_connect(s->ctx, s->server, 0, NULL)) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot connect context: %s.\n", pa_strerror(ret));
ret = AVERROR_EXTERNAL;
goto fail;
}
if ((ret = pulse_context_wait(s)) < 0) {
av_log(s, AV_LOG_ERROR, "Context failed.\n");
goto fail;
}
s->stream = pa_stream_new(s->ctx, stream_name, &sample_spec,
channel_map.channels ? &channel_map : NULL);
if ((ret = pulse_update_sink_info(h)) < 0) {
av_log(s, AV_LOG_ERROR, "Updating sink info failed.\n");
goto fail;
}
if (!s->stream) {
av_log(s, AV_LOG_ERROR, "Cannot create stream.\n");
ret = AVERROR(ENOMEM);
goto fail;
}
pa_stream_set_state_callback(s->stream, pulse_stream_state, s);
pa_stream_set_write_callback(s->stream, pulse_stream_writable, h);
pa_stream_set_overflow_callback(s->stream, pulse_overflow, h);
pa_stream_set_underflow_callback(s->stream, pulse_underflow, h);
if ((ret = pa_stream_connect_playback(s->stream, s->device, &buffer_attributes,
stream_flags, NULL, NULL)) < 0) {
av_log(s, AV_LOG_ERROR, "pa_stream_connect_playback failed: %s.\n", pa_strerror(ret));
ret = AVERROR_EXTERNAL;
goto fail;
}
if ((ret = pulse_stream_wait(s)) < 0) {
av_log(s, AV_LOG_ERROR, "Stream failed.\n");
goto fail;
}
/* read back buffer attributes for future use */
buffer_attributes = *pa_stream_get_buffer_attr(s->stream);
s->buffer_size = buffer_attributes.tlength;
s->prebuf = buffer_attributes.prebuf;
s->minreq = buffer_attributes.minreq;
av_log(s, AV_LOG_DEBUG, "Real buffer attributes: size: %d, prebuf: %d, minreq: %d\n",
s->buffer_size, s->prebuf, s->minreq);
pa_threaded_mainloop_unlock(s->mainloop);
if ((ret = pulse_subscribe_events(s)) < 0) {
av_log(s, AV_LOG_ERROR, "Event subscription failed.\n");
/* a bit ugly but the simplest to lock here*/
pa_threaded_mainloop_lock(s->mainloop);
goto fail;
}
/* force control messages */
s->mute = -1;
s->last_volume = PA_VOLUME_INVALID;
pa_threaded_mainloop_lock(s->mainloop);
if ((ret = pulse_update_sink_input_info(h)) < 0) {
av_log(s, AV_LOG_ERROR, "Updating sink input info failed.\n");
goto fail;
}
pa_threaded_mainloop_unlock(s->mainloop);
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
return 0;
fail:
pa_threaded_mainloop_unlock(s->mainloop);
pulse_write_trailer(h);
return ret;
}
static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
{
PulseData *s = h->priv_data;
int ret;
int64_t writable_size;
if (!pkt)
return pulse_flash_stream(s);
if (pkt->dts != AV_NOPTS_VALUE)
s->timestamp = pkt->dts;
if (pkt->duration) {
s->timestamp += pkt->duration;
} else {
AVStream *st = h->streams[0];
AVRational r = { 1, st->codecpar->sample_rate };
int64_t samples = pkt->size / (av_get_bytes_per_sample(st->codecpar->format) * st->codecpar->ch_layout.nb_channels);
s->timestamp += av_rescale_q(samples, r, st->time_base);
}
pa_threaded_mainloop_lock(s->mainloop);
if (!PA_STREAM_IS_GOOD(pa_stream_get_state(s->stream))) {
av_log(s, AV_LOG_ERROR, "PulseAudio stream is in invalid state.\n");
goto fail;
}
while (pa_stream_writable_size(s->stream) < s->minreq) {
if (s->nonblocking) {
pa_threaded_mainloop_unlock(s->mainloop);
return AVERROR(EAGAIN);
} else
pa_threaded_mainloop_wait(s->mainloop);
}
if ((ret = pa_stream_write(s->stream, pkt->data, pkt->size, NULL, 0, PA_SEEK_RELATIVE)) < 0) {
av_log(s, AV_LOG_ERROR, "pa_stream_write failed: %s\n", pa_strerror(ret));
goto fail;
}
if ((writable_size = pa_stream_writable_size(s->stream)) >= s->minreq)
avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &writable_size, sizeof(writable_size));
pa_threaded_mainloop_unlock(s->mainloop);
return 0;
fail:
pa_threaded_mainloop_unlock(s->mainloop);
return AVERROR_EXTERNAL;
}
static int pulse_write_frame(AVFormatContext *h, int stream_index,
AVFrame **frame, unsigned flags)
{
AVPacket pkt;
/* Planar formats are not supported yet. */
if (flags & AV_WRITE_UNCODED_FRAME_QUERY)
return av_sample_fmt_is_planar(h->streams[stream_index]->codecpar->format) ?
AVERROR(EINVAL) : 0;
pkt.data = (*frame)->data[0];
pkt.size = (*frame)->nb_samples * av_get_bytes_per_sample((*frame)->format) * (*frame)->ch_layout.nb_channels;
pkt.dts = (*frame)->pkt_dts;
#if FF_API_PKT_DURATION
FF_DISABLE_DEPRECATION_WARNINGS
if ((*frame)->pkt_duration)
pkt.duration = (*frame)->pkt_duration;
else
FF_ENABLE_DEPRECATION_WARNINGS
#endif
pkt.duration = (*frame)->duration;
return pulse_write_packet(h, &pkt);
}
static void pulse_get_output_timestamp(AVFormatContext *h, int stream, int64_t *dts, int64_t *wall)
{
PulseData *s = h->priv_data;
pa_usec_t latency;
int neg;
pa_threaded_mainloop_lock(s->mainloop);
pa_stream_get_latency(s->stream, &latency, &neg);
pa_threaded_mainloop_unlock(s->mainloop);
if (wall)
*wall = av_gettime();
if (dts)
*dts = s->timestamp - (neg ? -latency : latency);
}
static int pulse_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
{
PulseData *s = h->priv_data;
return ff_pulse_audio_get_devices(device_list, s->server, 1);
}
static int pulse_control_message(AVFormatContext *h, int type,
void *data, size_t data_size)
{
PulseData *s = h->priv_data;
int ret;
switch(type) {
case AV_APP_TO_DEV_PAUSE:
return pulse_set_pause(s, 1);
case AV_APP_TO_DEV_PLAY:
return pulse_set_pause(s, 0);
case AV_APP_TO_DEV_TOGGLE_PAUSE:
return pulse_set_pause(s, !pa_stream_is_corked(s->stream));
case AV_APP_TO_DEV_MUTE:
if (!s->mute) {
s->mute = 1;
return pulse_set_mute(s);
}
return 0;
case AV_APP_TO_DEV_UNMUTE:
if (s->mute) {
s->mute = 0;
return pulse_set_mute(s);
}
return 0;
case AV_APP_TO_DEV_TOGGLE_MUTE:
s->mute = !s->mute;
return pulse_set_mute(s);
case AV_APP_TO_DEV_SET_VOLUME:
return pulse_set_volume(s, *(double *)data);
case AV_APP_TO_DEV_GET_VOLUME:
s->last_volume = PA_VOLUME_INVALID;
pa_threaded_mainloop_lock(s->mainloop);
ret = pulse_update_sink_input_info(h);
pa_threaded_mainloop_unlock(s->mainloop);
return ret;
case AV_APP_TO_DEV_GET_MUTE:
s->mute = -1;
pa_threaded_mainloop_lock(s->mainloop);
ret = pulse_update_sink_input_info(h);
pa_threaded_mainloop_unlock(s->mainloop);
return ret;
default:
break;
}
return AVERROR(ENOSYS);
}
#define OFFSET(a) offsetof(PulseData, a)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "server", "set PulseAudio server", OFFSET(server), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ "name", "set application name", OFFSET(name), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, E },
{ "stream_name", "set stream description", OFFSET(stream_name), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ "device", "set device name", OFFSET(device), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
{ "buffer_size", "set buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
{ "buffer_duration", "set buffer duration in millisecs", OFFSET(buffer_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
{ "prebuf", "set pre-buffering size", OFFSET(prebuf), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
{ "minreq", "set minimum request size", OFFSET(minreq), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
{ NULL }
};
static const AVClass pulse_muxer_class = {
.class_name = "PulseAudio outdev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
};
const FFOutputFormat ff_pulse_muxer = {
.p.name = "pulse",
.p.long_name = NULL_IF_CONFIG_SMALL("Pulse audio output"),
.priv_data_size = sizeof(PulseData),
.p.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
.p.video_codec = AV_CODEC_ID_NONE,
.write_header = pulse_write_header,
.write_packet = pulse_write_packet,
.write_uncoded_frame = pulse_write_frame,
.write_trailer = pulse_write_trailer,
.get_output_timestamp = pulse_get_output_timestamp,
.get_device_list = pulse_get_device_list,
.control_message = pulse_control_message,
.p.flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
.p.priv_class = &pulse_muxer_class,
};
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