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https://github.com/obsproject/obs-studio.git
synced 2026-06-11 01:08:29 -04:00
33dc028c7e
- Add CoreAudio device input capture for mac audio capturing. The code should cover just about everything for capturing mac input device audio. Because of the way mac audio is designed, users may have no choice but to obtain the open source soundflower software to capture their mac's desktop audio. It may be necessary for us to distribute it with the program as well. - Hide event backend - Use win32 events for windows - Allow timed waits for events - Fix a few warnings
112 lines
2.3 KiB
C
112 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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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 (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(const char *locale)
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{
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UNUSED_PARAMETER(locale);
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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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event_signal(swd->event);
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pthread_join(swd->thread, &ret);
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}
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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 (event_init(&swd->event, 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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