mirror of
https://github.com/obsproject/obs-studio.git
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jp9000
0b4a259e56
The locale parameter was a mistake, because it puts extra needless burden upon the module developer to have to handle this variable for each and every single callback function. The parameter is being removed in favor of a single centralized module callback function that specifically updates locale information for a module only when needed.
111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
#include <math.h>
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#include <util/bmem.h>
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#include <util/threading.h>
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#include <util/platform.h>
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#include <obs.h>
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struct sinewave_data {
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bool initialized_thread;
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pthread_t thread;
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os_event_t event;
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obs_source_t source;
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};
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/* middle C */
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static const double rate = 261.63/48000.0;
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#ifndef M_PI
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#define M_PI 3.1415926535897932384626433832795
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#endif
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#define M_PI_X2 M_PI*2
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static void *sinewave_thread(void *pdata)
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{
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struct sinewave_data *swd = pdata;
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uint64_t last_time = os_gettime_ns();
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uint64_t ts = 0;
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double cos_val = 0.0;
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uint8_t bytes[480];
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while (os_event_try(swd->event) == EAGAIN) {
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if (!os_sleepto_ns(last_time += 10000000))
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last_time = os_gettime_ns();
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for (size_t i = 0; i < 480; i++) {
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cos_val += rate * M_PI_X2;
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if (cos_val > M_PI_X2)
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cos_val -= M_PI_X2;
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double wave = cos(cos_val) * 0.5;
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bytes[i] = (uint8_t)((wave+1.0)*0.5 * 255.0);
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}
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struct source_audio data;
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data.data[0] = bytes;
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data.frames = 480;
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data.speakers = SPEAKERS_MONO;
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data.samples_per_sec = 48000;
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data.timestamp = ts;
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data.format = AUDIO_FORMAT_U8BIT;
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obs_source_output_audio(swd->source, &data);
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ts += 10000000;
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}
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return NULL;
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}
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/* ------------------------------------------------------------------------- */
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static const char *sinewave_getname(void)
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{
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return "Sinewave Sound Source (Test)";
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}
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static void sinewave_destroy(void *data)
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{
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struct sinewave_data *swd = data;
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if (swd) {
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if (swd->initialized_thread) {
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void *ret;
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os_event_signal(swd->event);
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pthread_join(swd->thread, &ret);
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}
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os_event_destroy(swd->event);
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bfree(swd);
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}
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}
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static void *sinewave_create(obs_data_t settings,
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obs_source_t source)
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{
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struct sinewave_data *swd = bzalloc(sizeof(struct sinewave_data));
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swd->source = source;
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if (os_event_init(&swd->event, OS_EVENT_TYPE_MANUAL) != 0)
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goto fail;
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if (pthread_create(&swd->thread, NULL, sinewave_thread, swd) != 0)
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goto fail;
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swd->initialized_thread = true;
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UNUSED_PARAMETER(settings);
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return swd;
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fail:
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sinewave_destroy(swd);
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return NULL;
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}
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struct obs_source_info test_sinewave = {
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.id = "test_sinewave",
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.type = OBS_SOURCE_TYPE_INPUT,
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.output_flags = OBS_SOURCE_AUDIO,
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.getname = sinewave_getname,
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.create = sinewave_create,
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.destroy = sinewave_destroy,
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};
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