static void add_audio_buffering(struct obs_core_audio *audio,
size_t sample_rate, struct ts_info *ts, uint64_t min_ts)
{
struct ts_info new_ts;
uint64_t offset;
uint64_t frames;
int ticks;
if (audio->total_buffering_ticks == MAX_BUFFERING_TICKS)
return;
if (!audio->buffering_wait_ticks)
audio->buffered_ts = ts->start;
offset = ts->start - min_ts;
frames = ns_to_audio_frames(sample_rate, offset);
ticks = (int)((frames + AUDIO_OUTPUT_FRAMES - 1) / AUDIO_OUTPUT_FRAMES);
audio->total_buffering_ticks += ticks;
if (audio->total_buffering_ticks >= MAX_BUFFERING_TICKS) {
ticks -= audio->total_buffering_ticks - MAX_BUFFERING_TICKS;
audio->total_buffering_ticks = MAX_BUFFERING_TICKS;
blog(LOG_WARNING, "Max audio buffering reached!");
}
blog(LOG_INFO, "adding %d ticks of buffering, total buffering is "
"now %d", ticks, audio->total_buffering_ticks);
#if DEBUG_AUDIO == 1
blog(LOG_DEBUG, "min_ts (%"PRIu64") < start timestamp "
"(%"PRIu64")", min_ts, ts->start);
blog(LOG_DEBUG, "old buffered ts: %"PRIu64"-%"PRIu64,
ts->start, ts->end);
#endif
new_ts.start = audio->buffered_ts - audio_frames_to_ns(sample_rate,
audio->buffering_wait_ticks * AUDIO_OUTPUT_FRAMES);
while (ticks--) {
int cur_ticks = ++audio->buffering_wait_ticks;
new_ts.end = new_ts.start;
new_ts.start = audio->buffered_ts - audio_frames_to_ns(
sample_rate,
cur_ticks * AUDIO_OUTPUT_FRAMES);
#if DEBUG_AUDIO == 1
blog(LOG_DEBUG, "add buffered ts: %"PRIu64"-%"PRIu64,
new_ts.start, new_ts.end);
#endif
circlebuf_push_front(&audio->buffered_timestamps, &new_ts,
sizeof(new_ts));
}
*ts = new_ts;
}
static void *audio_thread(void *param)
{
struct audio_output *audio = param;
size_t rate = audio->info.samples_per_sec;
uint64_t samples = 0;
uint64_t start_time = os_gettime_ns();
uint64_t prev_time = start_time;
uint64_t audio_time = prev_time;
uint32_t audio_wait_time =
(uint32_t)(audio_frames_to_ns(rate, AUDIO_OUTPUT_FRAMES) /
1000000);
os_set_thread_name("audio-io: audio thread");
const char *audio_thread_name =
profile_store_name(obs_get_profiler_name_store(),
"audio_thread(%s)", audio->info.name);
while (os_event_try(audio->stop_event) == EAGAIN) {
uint64_t cur_time;
os_sleep_ms(audio_wait_time);
profile_start(audio_thread_name);
cur_time = os_gettime_ns();
while (audio_time <= cur_time) {
samples += AUDIO_OUTPUT_FRAMES;
audio_time = start_time +
audio_frames_to_ns(rate, samples);
input_and_output(audio, audio_time, prev_time);
prev_time = audio_time;
}
profile_end(audio_thread_name);
profile_reenable_thread();
}
return NULL;
}
