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Use a single condvar in recorder

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The sc_cond_wait() in sc_recorder_process_header() needs to be notified
of changes to video_init/audio_init (protected by stream_cond) and
video_queue/audio_queue (protected by queue_cond).

Use only one condition variable to simplify.
This commit is contained in:
Romain Vimont 2023-06-03 15:05:23 +02:00
parent 2aec7b4c9d
commit 379caf8551
2 changed files with 13 additions and 23 deletions
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33
app/src/recorder.c
View file

@ -181,7 +181,7 @@ sc_recorder_process_header(struct sc_recorder *recorder) {
while (!recorder->stopped && (!recorder->video_init
|| !recorder->audio_init
|| sc_recorder_has_empty_queues(recorder))) {
sc_cond_wait(&recorder->stream_cond, &recorder->mutex);
sc_cond_wait(&recorder->cond, &recorder->mutex);
}
if (recorder->video && sc_vecdeque_is_empty(&recorder->video_queue)) {
@ -289,7 +289,7 @@ sc_recorder_process_packets(struct sc_recorder *recorder) {
// A new packet may be assigned to audio_pkt and be processed
break;
}
sc_cond_wait(&recorder->queue_cond, &recorder->mutex);
sc_cond_wait(&recorder->cond, &recorder->mutex);
}
// If stopped is set, continue to process the remaining events (to
@ -507,7 +507,7 @@ sc_recorder_video_packet_sink_open(struct sc_packet_sink *sink,
recorder->video_stream_index = stream->index;
recorder->video_init = true;
sc_cond_signal(&recorder->stream_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
return true;
@ -522,7 +522,7 @@ sc_recorder_video_packet_sink_close(struct sc_packet_sink *sink) {
sc_mutex_lock(&recorder->mutex);
// EOS also stops the recorder
recorder->stopped = true;
sc_cond_signal(&recorder->queue_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
}
@ -557,7 +557,7 @@ sc_recorder_video_packet_sink_push(struct sc_packet_sink *sink,
return false;
}
sc_cond_signal(&recorder->queue_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
return true;
@ -588,7 +588,7 @@ sc_recorder_audio_packet_sink_open(struct sc_packet_sink *sink,
recorder->audio_stream_index = stream->index;
recorder->audio_init = true;
sc_cond_signal(&recorder->stream_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
return true;
@ -604,7 +604,7 @@ sc_recorder_audio_packet_sink_close(struct sc_packet_sink *sink) {
sc_mutex_lock(&recorder->mutex);
// EOS also stops the recorder
recorder->stopped = true;
sc_cond_signal(&recorder->queue_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
}
@ -640,7 +640,7 @@ sc_recorder_audio_packet_sink_push(struct sc_packet_sink *sink,
return false;
}
sc_cond_signal(&recorder->queue_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
return true;
@ -658,7 +658,7 @@ sc_recorder_audio_packet_sink_disable(struct sc_packet_sink *sink) {
sc_mutex_lock(&recorder->mutex);
recorder->audio = false;
recorder->audio_init = true;
sc_cond_signal(&recorder->stream_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
}
@ -677,16 +677,11 @@ sc_recorder_init(struct sc_recorder *recorder, const char *filename,
goto error_free_filename;
}
ok = sc_cond_init(&recorder->queue_cond);
ok = sc_cond_init(&recorder->cond);
if (!ok) {
goto error_mutex_destroy;
}
ok = sc_cond_init(&recorder->stream_cond);
if (!ok) {
goto error_queue_cond_destroy;
}
assert(video || audio);
recorder->video = video;
recorder->audio = audio;
@ -730,8 +725,6 @@ sc_recorder_init(struct sc_recorder *recorder, const char *filename,
return true;
error_queue_cond_destroy:
sc_cond_destroy(&recorder->queue_cond);
error_mutex_destroy:
sc_mutex_destroy(&recorder->mutex);
error_free_filename:
@ -756,8 +749,7 @@ void
sc_recorder_stop(struct sc_recorder *recorder) {
sc_mutex_lock(&recorder->mutex);
recorder->stopped = true;
sc_cond_signal(&recorder->queue_cond);
sc_cond_signal(&recorder->stream_cond);
sc_cond_signal(&recorder->cond);
sc_mutex_unlock(&recorder->mutex);
}
@ -768,8 +760,7 @@ sc_recorder_join(struct sc_recorder *recorder) {
void
sc_recorder_destroy(struct sc_recorder *recorder) {
sc_cond_destroy(&recorder->stream_cond);
sc_cond_destroy(&recorder->queue_cond);
sc_cond_destroy(&recorder->cond);
sc_mutex_destroy(&recorder->mutex);
free(recorder->filename);
}

3
app/src/recorder.h
View file

@ -35,14 +35,13 @@ struct sc_recorder {
sc_thread thread;
sc_mutex mutex;
sc_cond queue_cond;
sc_cond cond;
// set on sc_recorder_stop(), packet_sink close or recording failure
bool stopped;
struct sc_recorder_queue video_queue;
struct sc_recorder_queue audio_queue;
// wake up the recorder thread once the video or audio codec is known
sc_cond stream_cond;
bool video_init;
bool audio_init;