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Fix high cpu usage when not receiving audio

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dec05eba
2025-12-08 02:22:23 +01:00
parent 80c5566d40
commit 2c53638bb0
4 changed files with 13 additions and 11 deletions
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15
src/main.cpp
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@@ -3552,7 +3552,7 @@ int main(int argc, char **argv) {
while(running) {
void *sound_buffer;
int sound_buffer_size = -1;
//const double time_before_read_seconds = clock_get_monotonic_seconds();
const double time_before_read_seconds = clock_get_monotonic_seconds();
if(audio_device.sound_device.handle) {
// TODO: use this instead of calculating time to read. But this can fluctuate and we dont want to go back in time,
// also it's 0.0 for some users???
@@ -3562,8 +3562,6 @@ int main(int argc, char **argv) {
const bool got_audio_data = sound_buffer_size >= 0;
//fprintf(stderr, "got audio data: %s\n", got_audio_data ? "yes" : "no");
//const double time_after_read_seconds = clock_get_monotonic_seconds();
//const double time_to_read_seconds = time_after_read_seconds - time_before_read_seconds;
//fprintf(stderr, "time to read: %f, %s, %f\n", time_to_read_seconds, got_audio_data ? "yes" : "no", timeout_sec);
const double this_audio_frame_time = clock_get_monotonic_seconds() - paused_time_offset;
@@ -3632,10 +3630,9 @@ int main(int argc, char **argv) {
}
}
if(!audio_device.sound_device.handle)
if(!audio_device.sound_device.handle) {
av_usleep(timeout_ms * 1000);
if(got_audio_data) {
} else if(got_audio_data) {
// TODO: Instead of converting audio, get float audio from alsa. Or does alsa do conversion internally to get this format?
if(needs_audio_conversion)
swr_convert(swr, &audio_device.frame->data[0], audio_track.codec_context->frame_size, (const uint8_t**)&sound_buffer, audio_track.codec_context->frame_size);
@@ -3663,6 +3660,12 @@ int main(int argc, char **argv) {
audio_device.frame->pts += audio_track.codec_context->frame_size;
num_received_frames++;
} else {
const double time_after_read_seconds = clock_get_monotonic_seconds();
const double time_to_read_seconds = time_after_read_seconds - time_before_read_seconds;
const double time_to_sleep_until_next_frame = timeout_sec - time_to_read_seconds;
if(time_to_sleep_until_next_frame > 0.0)
av_usleep(time_to_sleep_until_next_frame * 1000ULL * 1000ULL);
}
}