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Time based audio latency, test, might fix some shits

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dec05eba
2024-04-11 14:40:27 +02:00
parent f8322c3c28
commit 52688dad72
3 changed files with 85 additions and 163 deletions
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88
src/sound.cpp
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@@ -41,6 +41,7 @@ struct pa_handle {
size_t output_index, output_length;
int operation_success;
double latency_seconds;
};
static void pa_sound_device_free(pa_handle *s) {
@@ -79,6 +80,7 @@ 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);
@@ -153,78 +155,41 @@ fail:
return NULL;
}
// Returns a negative value on failure or if |p->output_length| data is not available within the time frame specified by the sample rate
static int pa_sound_device_read(pa_handle *p) {
static int pa_sound_device_read(pa_handle *p, double timeout_seconds) {
assert(p);
const int64_t timeout_ms = std::round((1000.0 / (double)pa_stream_get_sample_spec(p->stream)->rate) * 1000.0);
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 (p->output_index < p->output_length) {
if((clock_get_monotonic_seconds() - start_time) * 1000 >= timeout_ms)
return -1;
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);
if(!p->read_data) {
pa_mainloop_prepare(p->mainloop, 1 * 1000); // 1 ms
pa_mainloop_poll(p->mainloop);
pa_mainloop_dispatch(p->mainloop);
if(pa_stream_peek(p->stream, &p->read_data, &p->read_length) < 0)
goto fail;
if(pa_stream_peek(p->stream, &p->read_data, &p->read_length) < 0)
goto fail;
if(!p->read_data && p->read_length == 0)
continue;
if(!p->read_data && p->read_length == 0)
continue;
// 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) {
// 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;
}
}
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;
}
success = true;
fail:
return success ? 0 : -1;
return -1;
}
static pa_sample_format_t audio_format_to_pulse_audio_format(AudioFormat audio_format) {
@@ -269,6 +234,7 @@ 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;
}
@@ -278,14 +244,16 @@ void sound_device_close(SoundDevice *device) {
device->handle = NULL;
}
int sound_device_read_next_chunk(SoundDevice *device, void **buffer) {
int sound_device_read_next_chunk(SoundDevice *device, void **buffer, double timeout_sec) {
pa_handle *pa = (pa_handle*)device->handle;
if(pa_sound_device_read(pa) < 0) {
int size = pa_sound_device_read(pa, timeout_sec);
if(size < 0) {
//fprintf(stderr, "pa_simple_read() failed: %s\n", pa_strerror(error));
return -1;
}
*buffer = pa->output_data;
return device->frames;
device->latency_seconds = pa->latency_seconds;
return size;
}
static void pa_state_cb(pa_context *c, void *userdata) {