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https://git.ffmpeg.org/ffmpeg.git
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lavd/pulse_audio_enc: replace simple API with async API
Async API allows to use full capabilites of PulseAudio. Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
This commit is contained in:
Lukasz Marek
parent
10627e7e10
commit
eb9dee2d0d
@ -18,13 +18,14 @@
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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/simple.h>
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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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@ -33,12 +34,203 @@ typedef struct PulseData {
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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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pa_simple *pa;
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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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} 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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if (stream != s->stream)
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return;
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pa_threaded_mainloop_signal(s->mainloop, 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_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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@ -46,7 +238,12 @@ static av_cold int pulse_write_header(AVFormatContext *h)
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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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@ -82,47 +279,109 @@ static av_cold int pulse_write_header(AVFormatContext *h)
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return AVERROR(EINVAL);
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}
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s->pa = pa_simple_new(s->server, // Server
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s->name, // Application name
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PA_STREAM_PLAYBACK,
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s->device, // Device
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stream_name, // Description of a stream
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&sample_spec, // Sample format
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NULL, // Use default channel map
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&buffer_attributes, // Buffering attributes
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&ret); // Result
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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 (!s->pa) {
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av_log(s, AV_LOG_ERROR, "pa_simple_new failed: %s\n", pa_strerror(ret));
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return AVERROR(EIO);
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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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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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}
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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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pa_simple_flush(s->pa, NULL);
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pa_simple_free(s->pa);
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s->pa = NULL;
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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 error;
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int ret;
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if (!pkt) {
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if (pa_simple_flush(s->pa, &error) < 0) {
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av_log(s, AV_LOG_ERROR, "pa_simple_flush failed: %s\n", pa_strerror(error));
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return AVERROR(EIO);
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}
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return 1;
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}
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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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@ -137,12 +396,24 @@ static int pulse_write_packet(AVFormatContext *h, AVPacket *pkt)
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s->timestamp += av_rescale_q(samples, r, st->time_base);
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}
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if (pa_simple_write(s->pa, pkt->data, pkt->size, &error) < 0) {
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av_log(s, AV_LOG_ERROR, "pa_simple_write failed: %s\n", pa_strerror(error));
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return AVERROR(EIO);
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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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pa_threaded_mainloop_wait(s->mainloop);
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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);
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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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return AVERROR_EXTERNAL;
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}
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static int pulse_write_frame(AVFormatContext *h, int stream_index,
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@ -166,9 +437,13 @@ static int pulse_write_frame(AVFormatContext *h, int stream_index,
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static void pulse_get_output_timestamp(AVFormatContext *h, int stream, int64_t *dts, int64_t *wall)
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{
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PulseData *s = h->priv_data;
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pa_usec_t latency = pa_simple_get_latency(s->pa, NULL);
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pa_usec_t latency;
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int neg;
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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 - latency;
|
||||
*dts = s->timestamp - (neg ? -latency : latency);
|
||||
}
|
||||
|
||||
static int pulse_get_device_list(AVFormatContext *h, AVDeviceInfoList *device_list)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user