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Fix messed up audio on some distros (those using pulseaudio?)

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dec05eba
2024-04-11 18:46:34 +02:00
parent a6b1d13beb
commit ddac6acaf2
3 changed files with 57 additions and 31 deletions
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3
include/sound.hpp
View File

@@ -24,7 +24,6 @@
typedef struct {
void *handle;
unsigned int frames;
double latency_seconds;
} SoundDevice;
struct AudioInput {
@@ -54,7 +53,7 @@ void sound_device_close(SoundDevice *device);
/*
Returns the next chunk of audio into @buffer.
Returns the number of bytes read, or a negative value on failure.
Returns the number of frames read, or a negative value on failure.
*/
int sound_device_read_next_chunk(SoundDevice *device, void **buffer, double timeout_sec);

3
src/main.cpp
View File

@@ -2435,7 +2435,6 @@ int main(int argc, char **argv) {
if(new_pts == audio_device.frame->pts)
continue;
audio_device.frame->pts = new_pts;
//audio_device.frame->linesize[0] = sound_buffer_size / 2;
if(audio_track.graph) {
std::lock_guard<std::mutex> lock(audio_filter_mutex);
@@ -2468,7 +2467,6 @@ int main(int argc, char **argv) {
if(new_pts == audio_device.frame->pts)
continue;
audio_device.frame->pts = new_pts;
//audio_device.frame->linesize[0] = sound_buffer_size / 2;
if(audio_track.graph) {
std::lock_guard<std::mutex> lock(audio_filter_mutex);
@@ -2526,7 +2524,6 @@ int main(int argc, char **argv) {
if(new_pts == aframe->pts)
continue;
aframe->pts = new_pts;
//aframe->linesize[0] = sound_buffer_size / 2;
err = avcodec_send_frame(audio_track.codec_context, aframe);
if(err >= 0){
// TODO: Move to separate thread because this could write to network (for example when livestreaming)

82
src/sound.cpp
View File

@@ -41,7 +41,6 @@ struct pa_handle {
size_t output_index, output_length;
int operation_success;
double latency_seconds;
};
static void pa_sound_device_free(pa_handle *s) {
@@ -80,7 +79,6 @@ static pa_handle* pa_sound_device_new(const char *server,
p->read_data = NULL;
p->read_length = 0;
p->read_index = 0;
p->latency_seconds = 0;
const int buffer_size = attr->maxlength;
void *buffer = malloc(buffer_size);
@@ -160,36 +158,71 @@ static int pa_sound_device_read(pa_handle *p, double timeout_seconds) {
const double start_time = clock_get_monotonic_seconds();
bool success = false;
int r = 0;
//pa_usec_t latency = 0;
//int negative = 0;
int *rerror = &r;
CHECK_DEAD_GOTO(p, rerror, fail);
while(clock_get_monotonic_seconds() - start_time < timeout_seconds) {
pa_mainloop_prepare(p->mainloop, 1 * 1000);
pa_mainloop_poll(p->mainloop);
pa_mainloop_dispatch(p->mainloop);
while (p->output_index < p->output_length) {
if(clock_get_monotonic_seconds() - start_time >= timeout_seconds)
return -1;
if(pa_stream_peek(p->stream, &p->read_data, &p->read_length) < 0)
goto fail;
if(!p->read_data) {
pa_mainloop_prepare(p->mainloop, 1 * 1000); // 1 ms
pa_mainloop_poll(p->mainloop);
pa_mainloop_dispatch(p->mainloop);
if(!p->read_data && p->read_length == 0)
continue;
if(pa_stream_peek(p->stream, &p->read_data, &p->read_length) < 0)
goto fail;
// pa_operation_unref(pa_stream_update_timing_info(p->stream, NULL, NULL));
// if (pa_stream_get_latency(p->stream, &latency, &negative) >= 0) {
// fprintf(stderr, "latency: %lu ms, negative: %d, extra delay: %f ms\n", latency / 1000, negative, (clock_get_monotonic_seconds() - start_time) * 1000.0);
// }
if(!p->read_data && p->read_length == 0)
continue;
memcpy(p->output_data, p->read_data, p->read_length);
pa_stream_drop(p->stream);
p->latency_seconds = clock_get_monotonic_seconds() - start_time;
return p->read_length;
if(!p->read_data && p->read_length > 0) {
// There is a hole in the stream :( drop it. Maybe we should generate silence instead? TODO
if(pa_stream_drop(p->stream) != 0)
goto fail;
continue;
}
if(p->read_length <= 0) {
p->read_data = NULL;
if(pa_stream_drop(p->stream) != 0)
goto fail;
CHECK_DEAD_GOTO(p, rerror, fail);
continue;
}
}
const size_t space_free_in_output_buffer = p->output_length - p->output_index;
if(space_free_in_output_buffer < p->read_length) {
memcpy(p->output_data + p->output_index, (const uint8_t*)p->read_data + p->read_index, space_free_in_output_buffer);
p->output_index = 0;
p->read_index += space_free_in_output_buffer;
p->read_length -= space_free_in_output_buffer;
break;
} else {
memcpy(p->output_data + p->output_index, (const uint8_t*)p->read_data + p->read_index, p->read_length);
p->output_index += p->read_length;
p->read_data = NULL;
p->read_length = 0;
p->read_index = 0;
if(pa_stream_drop(p->stream) != 0)
goto fail;
if(p->output_index == p->output_length) {
p->output_index = 0;
break;
}
}
}
success = true;
fail:
return -1;
return success ? 0 : -1;
}
static pa_sample_format_t audio_format_to_pulse_audio_format(AudioFormat audio_format) {
@@ -234,7 +267,6 @@ int sound_device_get_by_name(SoundDevice *device, const char *device_name, const
device->handle = handle;
device->frames = period_frame_size;
device->latency_seconds = 0.0;
return 0;
}
@@ -246,14 +278,12 @@ void sound_device_close(SoundDevice *device) {
int sound_device_read_next_chunk(SoundDevice *device, void **buffer, double timeout_sec) {
pa_handle *pa = (pa_handle*)device->handle;
int size = pa_sound_device_read(pa, timeout_sec);
if(size < 0) {
if(pa_sound_device_read(pa, timeout_sec) < 0) {
//fprintf(stderr, "pa_simple_read() failed: %s\n", pa_strerror(error));
return -1;
}
*buffer = pa->output_data;
device->latency_seconds = pa->latency_seconds;
return size;
return device->frames;
}
static void pa_state_cb(pa_context *c, void *userdata) {