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Code submissions have continually suffered from formatting inconsistencies that constantly have to be addressed. Using clang-format simplifies this by making code formatting more consistent, and allows automation of the code formatting so that maintainers can focus more on the code itself instead of code formatting.
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 obs_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 *unused)
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{
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UNUSED_PARAMETER(unused);
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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, 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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.get_name = sinewave_getname,
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.create = sinewave_create,
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.destroy = sinewave_destroy,
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};
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