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.
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
/*
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* Copyright (c) 2013 Hugh Bailey <obs.jim@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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/*
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* Allows posix thread usage on windows as well as other operating systems.
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* Use this header if you want to make your code more platform independent.
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*
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* Also provides a custom platform-independent "event" handler via
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* pthread conditional waits.
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*/
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#include "c99defs.h"
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#ifdef _MSC_VER
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#include "../../deps/w32-pthreads/pthread.h"
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#include "../../deps/w32-pthreads/semaphore.h"
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#else
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#include <errno.h>
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#include <pthread.h>
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#include <semaphore.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* this may seem strange, but you can't use it unless it's an initializer */
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static inline void pthread_mutex_init_value(pthread_mutex_t *mutex)
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{
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pthread_mutex_t init_val = PTHREAD_MUTEX_INITIALIZER;
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*mutex = init_val;
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}
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struct event_data {
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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bool signalled;
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bool manual;
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};
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enum event_type {
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EVENT_TYPE_AUTO,
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EVENT_TYPE_MANUAL
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};
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typedef struct event_data event_t;
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static inline int event_init(event_t *event, enum event_type type)
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{
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int code = 0;
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if ((code = pthread_mutex_init(&event->mutex, NULL)) < 0)
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return code;
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if ((code = pthread_cond_init(&event->cond, NULL)) < 0)
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pthread_mutex_destroy(&event->mutex);
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event->manual = (type == EVENT_TYPE_MANUAL);
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event->signalled = false;
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return code;
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}
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static inline void event_destroy(event_t *event)
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{
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if (event) {
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pthread_mutex_destroy(&event->mutex);
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pthread_cond_destroy(&event->cond);
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}
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}
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static inline int event_wait(event_t *event)
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{
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int code = 0;
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pthread_mutex_lock(&event->mutex);
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if (event->signalled ||
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(code = pthread_cond_wait(&event->cond, &event->mutex)) == 0) {
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if (!event->manual)
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event->signalled = false;
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pthread_mutex_unlock(&event->mutex);
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}
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return code;
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}
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static inline int event_try(event_t *event)
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{
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pthread_mutex_lock(&event->mutex);
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if (event->signalled) {
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if (!event->manual)
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event->signalled = false;
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pthread_mutex_unlock(&event->mutex);
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return 0;
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}
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pthread_mutex_unlock(&event->mutex);
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return EAGAIN;
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}
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static inline int event_signal(event_t *event)
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{
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int code = 0;
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pthread_mutex_lock(&event->mutex);
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code = pthread_cond_signal(&event->cond);
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event->signalled = true;
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pthread_mutex_unlock(&event->mutex);
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return code;
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}
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static inline void event_reset(event_t *event)
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{
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pthread_mutex_lock(&event->mutex);
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event->signalled = false;
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pthread_mutex_unlock(&event->mutex);
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}
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#ifdef __cplusplus
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}
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#endif
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