mirror of
https://github.com/obsproject/obs-studio.git
synced 2024-09-20 13:08:50 +02:00
f827ba38ef
- Added a test audio sinewave test source that should just play a sine wave of the middle C note. Using unsigned 8 bit mono to test ffmpeg's audio resampler, seems to work pretty good. - Fixed a boolean trap in threading.h for the event_init function, it now uses enum event_type, which can be EVENT_TYPE_MANUAL or EVENT_TYPE_AUTO, to specify whether the event is automatically reset or not. - Changed display names of test sources to something a little less vague. - Removed te whole "if timestamp is 0 just use current system time" when outputting source audio, if you want to use system time you should just use system time yourself. Using 0 as some sort of "indicator" like that just makes things confusing, and prevents you from legitimately using 0 as a timestamp for your audio data.
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
#include <math.h>
|
|
#include "test-sinewave.h"
|
|
|
|
const double rate = 261.63/48000.0;
|
|
|
|
#define M_PI 3.1415926535897932384626433832795
|
|
|
|
static void *sinewave_thread(void *pdata)
|
|
{
|
|
struct sinewave_data *swd = pdata;
|
|
uint64_t last_time = os_gettime_ns();
|
|
uint64_t ts = 0;
|
|
double sin_val = 0.0;
|
|
uint8_t bytes[480];
|
|
|
|
while (event_try(&swd->event) == EAGAIN) {
|
|
os_sleepto_ns(last_time += 10000000);
|
|
|
|
for (size_t i = 0; i < 480; i++) {
|
|
sin_val += rate * M_PI;
|
|
if (sin_val > M_PI)
|
|
sin_val -= M_PI;
|
|
|
|
double wave = sin(sin_val);
|
|
bytes[i] = (uint8_t)(wave * 255.0);
|
|
}
|
|
|
|
struct source_audio data;
|
|
data.data = bytes;
|
|
data.frames = 480;
|
|
data.speakers = SPEAKERS_MONO;
|
|
data.samples_per_sec = 48000;
|
|
data.timestamp = ts;
|
|
data.format = AUDIO_FORMAT_U8BIT;
|
|
obs_source_output_audio(swd->source, &data);
|
|
|
|
ts += 10000000;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
const char *sinewave_getname(const char *locale)
|
|
{
|
|
return "Sinewave Sound Source (Test)";
|
|
}
|
|
|
|
struct sinewave_data *sinewave_create(const char *settings, obs_source_t source)
|
|
{
|
|
struct sinewave_data *swd = bmalloc(sizeof(struct sinewave_data));
|
|
memset(swd, 0, sizeof(struct sinewave_data));
|
|
swd->source = source;
|
|
|
|
if (event_init(&swd->event, EVENT_TYPE_MANUAL) != 0)
|
|
goto fail;
|
|
if (pthread_create(&swd->thread, NULL, sinewave_thread, swd) != 0)
|
|
goto fail;
|
|
|
|
swd->initialized_thread = true;
|
|
return swd;
|
|
|
|
fail:
|
|
sinewave_destroy(swd);
|
|
return NULL;
|
|
}
|
|
|
|
void sinewave_destroy(struct sinewave_data *swd)
|
|
{
|
|
if (swd) {
|
|
if (swd->initialized_thread) {
|
|
void *ret;
|
|
event_signal(&swd->event);
|
|
pthread_join(swd->thread, &ret);
|
|
}
|
|
|
|
event_destroy(&swd->event);
|
|
bfree(swd);
|
|
}
|
|
}
|
|
|
|
uint32_t sinewave_get_output_flags(struct sinewave_data *swd)
|
|
{
|
|
return SOURCE_AUDIO;
|
|
}
|