mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
515 lines
19 KiB
C
515 lines
19 KiB
C
/*
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* Copyright (c) 2013 Lukasz Marek <lukasz.m.luki@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <pulse/pulseaudio.h>
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#include <pulse/error.h>
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#include "libavformat/avformat.h"
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#include "libavformat/internal.h"
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#include "libavutil/opt.h"
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#include "libavutil/time.h"
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#include "libavutil/log.h"
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#include "libavutil/attributes.h"
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#include "pulse_audio_common.h"
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typedef struct PulseData {
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AVClass *class;
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const char *server;
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const char *name;
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const char *stream_name;
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const char *device;
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int64_t timestamp;
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int buffer_size; /**< Buffer size in bytes */
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int buffer_duration; /**< Buffer size in ms, recalculated to buffer_size */
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int last_result;
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pa_threaded_mainloop *mainloop;
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pa_context *ctx;
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pa_stream *stream;
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int nonblocking;
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} PulseData;
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static void pulse_stream_writable(pa_stream *stream, size_t nbytes, void *userdata)
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{
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AVFormatContext *h = userdata;
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PulseData *s = h->priv_data;
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int64_t val = nbytes;
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if (stream != s->stream)
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return;
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avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_WRITABLE, &val, sizeof(val));
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pa_threaded_mainloop_signal(s->mainloop, 0);
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}
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static void pulse_overflow(pa_stream *stream, void *userdata)
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{
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AVFormatContext *h = userdata;
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avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_OVERFLOW, NULL, 0);
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}
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static void pulse_underflow(pa_stream *stream, void *userdata)
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{
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AVFormatContext *h = userdata;
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avdevice_dev_to_app_control_message(h, AV_DEV_TO_APP_BUFFER_UNDERFLOW, NULL, 0);
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}
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static void pulse_stream_state(pa_stream *stream, void *userdata)
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{
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PulseData *s = userdata;
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if (stream != s->stream)
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return;
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switch (pa_stream_get_state(s->stream)) {
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case PA_STREAM_READY:
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case PA_STREAM_FAILED:
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case PA_STREAM_TERMINATED:
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pa_threaded_mainloop_signal(s->mainloop, 0);
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default:
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break;
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}
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}
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static int pulse_stream_wait(PulseData *s)
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{
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pa_stream_state_t state;
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while ((state = pa_stream_get_state(s->stream)) != PA_STREAM_READY) {
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if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
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return AVERROR_EXTERNAL;
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pa_threaded_mainloop_wait(s->mainloop);
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}
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return 0;
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}
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static void pulse_context_state(pa_context *ctx, void *userdata)
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{
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PulseData *s = userdata;
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if (s->ctx != ctx)
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return;
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switch (pa_context_get_state(ctx)) {
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case PA_CONTEXT_READY:
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case PA_CONTEXT_FAILED:
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case PA_CONTEXT_TERMINATED:
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pa_threaded_mainloop_signal(s->mainloop, 0);
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default:
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break;
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}
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}
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static int pulse_context_wait(PulseData *s)
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{
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pa_context_state_t state;
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while ((state = pa_context_get_state(s->ctx)) != PA_CONTEXT_READY) {
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if (state == PA_CONTEXT_FAILED || state == PA_CONTEXT_TERMINATED)
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return AVERROR_EXTERNAL;
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pa_threaded_mainloop_wait(s->mainloop);
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}
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return 0;
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}
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static void pulse_stream_result(pa_stream *stream, int success, void *userdata)
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{
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PulseData *s = userdata;
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if (stream != s->stream)
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return;
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s->last_result = success ? 0 : AVERROR_EXTERNAL;
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pa_threaded_mainloop_signal(s->mainloop, 0);
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}
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static int pulse_finish_stream_operation(PulseData *s, pa_operation *op, const char *name)
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{
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if (!op) {
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pa_threaded_mainloop_unlock(s->mainloop);
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av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
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return AVERROR_EXTERNAL;
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}
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s->last_result = 2;
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while (s->last_result == 2)
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pa_threaded_mainloop_wait(s->mainloop);
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pa_operation_unref(op);
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pa_threaded_mainloop_unlock(s->mainloop);
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if (s->last_result != 0)
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av_log(s, AV_LOG_ERROR, "%s failed.\n", name);
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return s->last_result;
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}
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static int pulse_flash_stream(PulseData *s)
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{
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pa_operation *op;
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pa_threaded_mainloop_lock(s->mainloop);
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op = pa_stream_flush(s->stream, pulse_stream_result, s);
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return pulse_finish_stream_operation(s, op, "pa_stream_flush");
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}
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static void pulse_map_channels_to_pulse(int64_t channel_layout, pa_channel_map *channel_map)
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{
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channel_map->channels = 0;
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if (channel_layout & AV_CH_FRONT_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
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if (channel_layout & AV_CH_FRONT_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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if (channel_layout & AV_CH_FRONT_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_CENTER;
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if (channel_layout & AV_CH_LOW_FREQUENCY)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
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if (channel_layout & AV_CH_BACK_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_LEFT;
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if (channel_layout & AV_CH_BACK_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_RIGHT;
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if (channel_layout & AV_CH_FRONT_LEFT_OF_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
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if (channel_layout & AV_CH_FRONT_RIGHT_OF_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
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if (channel_layout & AV_CH_BACK_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_REAR_CENTER;
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if (channel_layout & AV_CH_SIDE_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_LEFT;
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if (channel_layout & AV_CH_SIDE_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_SIDE_RIGHT;
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if (channel_layout & AV_CH_TOP_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_CENTER;
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if (channel_layout & AV_CH_TOP_FRONT_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
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if (channel_layout & AV_CH_TOP_FRONT_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
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if (channel_layout & AV_CH_TOP_FRONT_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
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if (channel_layout & AV_CH_TOP_BACK_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
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if (channel_layout & AV_CH_TOP_BACK_CENTER)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
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if (channel_layout & AV_CH_TOP_BACK_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
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if (channel_layout & AV_CH_STEREO_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
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if (channel_layout & AV_CH_STEREO_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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if (channel_layout & AV_CH_WIDE_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX0;
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if (channel_layout & AV_CH_WIDE_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX1;
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if (channel_layout & AV_CH_SURROUND_DIRECT_LEFT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX2;
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if (channel_layout & AV_CH_SURROUND_DIRECT_RIGHT)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_AUX3;
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if (channel_layout & AV_CH_LOW_FREQUENCY_2)
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channel_map->map[channel_map->channels++] = PA_CHANNEL_POSITION_LFE;
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}
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static av_cold int pulse_write_trailer(AVFormatContext *h)
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{
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PulseData *s = h->priv_data;
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if (s->mainloop) {
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pa_threaded_mainloop_lock(s->mainloop);
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if (s->stream) {
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pa_stream_disconnect(s->stream);
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pa_stream_set_state_callback(s->stream, NULL, NULL);
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pa_stream_set_write_callback(s->stream, NULL, NULL);
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pa_stream_set_overflow_callback(s->stream, NULL, NULL);
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pa_stream_set_underflow_callback(s->stream, NULL, NULL);
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pa_stream_unref(s->stream);
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s->stream = NULL;
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}
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if (s->ctx) {
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pa_context_disconnect(s->ctx);
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pa_context_set_state_callback(s->ctx, NULL, NULL);
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pa_context_unref(s->ctx);
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s->ctx = NULL;
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}
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pa_threaded_mainloop_unlock(s->mainloop);
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pa_threaded_mainloop_stop(s->mainloop);
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pa_threaded_mainloop_free(s->mainloop);
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s->mainloop = NULL;
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}
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return 0;
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}
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static av_cold int pulse_write_header(AVFormatContext *h)
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{
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PulseData *s = h->priv_data;
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AVStream *st = NULL;
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int ret;
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pa_sample_spec sample_spec;
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pa_buffer_attr buffer_attributes = { -1, -1, -1, -1, -1 };
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pa_channel_map channel_map;
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pa_mainloop_api *mainloop_api;
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const char *stream_name = s->stream_name;
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static const pa_stream_flags_t stream_flags = PA_STREAM_INTERPOLATE_TIMING |
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PA_STREAM_AUTO_TIMING_UPDATE |
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PA_STREAM_NOT_MONOTONIC;
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if (h->nb_streams != 1 || h->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
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av_log(s, AV_LOG_ERROR, "Only a single audio stream is supported.\n");
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return AVERROR(EINVAL);
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}
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st = h->streams[0];
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if (!stream_name) {
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if (h->filename[0])
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stream_name = h->filename;
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else
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stream_name = "Playback";
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}
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s->nonblocking = (h->flags & AVFMT_FLAG_NONBLOCK);
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if (s->buffer_duration) {
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int64_t bytes = s->buffer_duration;
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bytes *= st->codec->channels * st->codec->sample_rate *
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av_get_bytes_per_sample(st->codec->sample_fmt);
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bytes /= 1000;
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buffer_attributes.tlength = FFMAX(s->buffer_size, av_clip64(bytes, 0, UINT32_MAX - 1));
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av_log(s, AV_LOG_DEBUG,
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"Buffer duration: %ums recalculated into %"PRId64" bytes buffer.\n",
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s->buffer_duration, bytes);
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av_log(s, AV_LOG_DEBUG, "Real buffer length is %u bytes\n", buffer_attributes.tlength);
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} else if (s->buffer_size)
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buffer_attributes.tlength = s->buffer_size;
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sample_spec.format = ff_codec_id_to_pulse_format(st->codec->codec_id);
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sample_spec.rate = st->codec->sample_rate;
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sample_spec.channels = st->codec->channels;
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if (!pa_sample_spec_valid(&sample_spec)) {
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av_log(s, AV_LOG_ERROR, "Invalid sample spec.\n");
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return AVERROR(EINVAL);
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}
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if (sample_spec.channels == 1) {
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channel_map.channels = 1;
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channel_map.map[0] = PA_CHANNEL_POSITION_MONO;
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} else if (st->codec->channel_layout) {
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if (av_get_channel_layout_nb_channels(st->codec->channel_layout) != st->codec->channels)
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return AVERROR(EINVAL);
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pulse_map_channels_to_pulse(st->codec->channel_layout, &channel_map);
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/* Unknown channel is present in channel_layout, let PulseAudio use its default. */
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if (channel_map.channels != sample_spec.channels) {
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av_log(s, AV_LOG_WARNING, "Unknown channel. Using defaul channel map.\n");
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channel_map.channels = 0;
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}
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} else
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channel_map.channels = 0;
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if (!channel_map.channels)
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av_log(s, AV_LOG_WARNING, "Using PulseAudio's default channel map.\n");
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else if (!pa_channel_map_valid(&channel_map)) {
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av_log(s, AV_LOG_ERROR, "Invalid channel map.\n");
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return AVERROR(EINVAL);
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}
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/* start main loop */
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s->mainloop = pa_threaded_mainloop_new();
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if (!s->mainloop) {
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av_log(s, AV_LOG_ERROR, "Cannot create threaded mainloop.\n");
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return AVERROR(ENOMEM);
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}
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if ((ret = pa_threaded_mainloop_start(s->mainloop)) < 0) {
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av_log(s, AV_LOG_ERROR, "Cannot start threaded mainloop: %s.\n", pa_strerror(ret));
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pa_threaded_mainloop_free(s->mainloop);
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s->mainloop = NULL;
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return AVERROR_EXTERNAL;
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}
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pa_threaded_mainloop_lock(s->mainloop);
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mainloop_api = pa_threaded_mainloop_get_api(s->mainloop);
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if (!mainloop_api) {
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av_log(s, AV_LOG_ERROR, "Cannot get mainloop API.\n");
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ret = AVERROR_EXTERNAL;
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goto fail;
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}
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s->ctx = pa_context_new(mainloop_api, s->name);
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if (!s->ctx) {
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av_log(s, AV_LOG_ERROR, "Cannot create context.\n");
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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pa_context_set_state_callback(s->ctx, pulse_context_state, s);
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if ((ret = pa_context_connect(s->ctx, s->server, 0, NULL)) < 0) {
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av_log(s, AV_LOG_ERROR, "Cannot connect context: %s.\n", pa_strerror(ret));
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ret = AVERROR_EXTERNAL;
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goto fail;
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}
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if ((ret = pulse_context_wait(s)) < 0) {
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av_log(s, AV_LOG_ERROR, "Context failed.\n");
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goto fail;
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}
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s->stream = pa_stream_new(s->ctx, stream_name, &sample_spec,
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channel_map.channels ? &channel_map : NULL);
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if (!s->stream) {
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av_log(s, AV_LOG_ERROR, "Cannot create stream.\n");
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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pa_stream_set_state_callback(s->stream, pulse_stream_state, s);
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pa_stream_set_write_callback(s->stream, pulse_stream_writable, h);
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pa_stream_set_overflow_callback(s->stream, pulse_overflow, h);
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pa_stream_set_underflow_callback(s->stream, pulse_underflow, h);
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if ((ret = pa_stream_connect_playback(s->stream, s->device, &buffer_attributes,
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stream_flags, NULL, NULL)) < 0) {
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av_log(s, AV_LOG_ERROR, "pa_stream_connect_playback failed: %s.\n", pa_strerror(ret));
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ret = AVERROR_EXTERNAL;
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goto fail;
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}
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if ((ret = pulse_stream_wait(s)) < 0) {
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av_log(s, AV_LOG_ERROR, "Stream failed.\n");
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goto fail;
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}
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pa_threaded_mainloop_unlock(s->mainloop);
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avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
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return 0;
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fail:
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pa_threaded_mainloop_unlock(s->mainloop);
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pulse_write_trailer(h);
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return ret;
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}
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static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
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{
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PulseData *s = h->priv_data;
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int ret;
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if (!pkt)
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return pulse_flash_stream(s);
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if (pkt->dts != AV_NOPTS_VALUE)
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s->timestamp = pkt->dts;
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if (pkt->duration) {
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s->timestamp += pkt->duration;
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} else {
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AVStream *st = h->streams[0];
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AVCodecContext *codec_ctx = st->codec;
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AVRational r = { 1, codec_ctx->sample_rate };
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int64_t samples = pkt->size / (av_get_bytes_per_sample(codec_ctx->sample_fmt) * codec_ctx->channels);
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s->timestamp += av_rescale_q(samples, r, st->time_base);
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}
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pa_threaded_mainloop_lock(s->mainloop);
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if (!PA_STREAM_IS_GOOD(pa_stream_get_state(s->stream))) {
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av_log(s, AV_LOG_ERROR, "PulseAudio stream is in invalid state.\n");
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goto fail;
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}
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while (!pa_stream_writable_size(s->stream)) {
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if (s->nonblocking) {
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pa_threaded_mainloop_unlock(s->mainloop);
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return AVERROR(EAGAIN);
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} else
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pa_threaded_mainloop_wait(s->mainloop);
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}
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if ((ret = pa_stream_write(s->stream, pkt->data, pkt->size, NULL, 0, PA_SEEK_RELATIVE)) < 0) {
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av_log(s, AV_LOG_ERROR, "pa_stream_write failed: %s\n", pa_strerror(ret));
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goto fail;
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}
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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]->codec->sample_fmt) ?
|
|
AVERROR(EINVAL) : 0;
|
|
|
|
pkt.data = (*frame)->data[0];
|
|
pkt.size = (*frame)->nb_samples * av_get_bytes_per_sample((*frame)->format) * (*frame)->channels;
|
|
pkt.dts = (*frame)->pkt_dts;
|
|
pkt.duration = av_frame_get_pkt_duration(*frame);
|
|
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);
|
|
*wall = av_gettime();
|
|
*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);
|
|
}
|
|
|
|
#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 },
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVClass pulse_muxer_class = {
|
|
.class_name = "PulseAudio muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
.category = AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
|
|
};
|
|
|
|
AVOutputFormat ff_pulse_muxer = {
|
|
.name = "pulse",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Pulse audio output"),
|
|
.priv_data_size = sizeof(PulseData),
|
|
.audio_codec = AV_NE(AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE),
|
|
.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,
|
|
.flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
|
|
.priv_class = &pulse_muxer_class,
|
|
};
|