f53df7da64
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.
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/*
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* Copyright (c) 2015 John R. Bradley <jrb@turrettech.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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#include "ff-clock.h"
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#include "ff-threading.h"
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#include <libavutil/avutil.h>
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#include <libavutil/time.h>
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// Amount of microseconds between checks to see if a clock has started
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#define CLOCK_START_CHECK_INTERVAL 100
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double ff_get_sync_clock(struct ff_clock *clock)
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{
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return clock->sync_clock(clock->opaque);
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}
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int64_t ff_clock_start_time(struct ff_clock *clock)
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{
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int64_t start_time = AV_NOPTS_VALUE;
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pthread_mutex_lock(&clock->mutex);
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if (clock->started)
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start_time = clock->start_time;
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pthread_mutex_unlock(&clock->mutex);
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return start_time;
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}
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bool ff_clock_start(struct ff_clock *clock, enum ff_av_sync_type sync_type,
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const bool *abort)
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{
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bool release = false;
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bool aborted = false;
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if (clock->sync_type == sync_type && !clock->started) {
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pthread_mutex_lock(&clock->mutex);
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if (!clock->started) {
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clock->start_time = av_gettime();
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clock->started = true;
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}
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pthread_cond_signal(&clock->cond);
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pthread_mutex_unlock(&clock->mutex);
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} else {
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while (!clock->started) {
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pthread_mutex_lock(&clock->mutex);
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int64_t current_time =
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av_gettime() + CLOCK_START_CHECK_INTERVAL;
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struct timespec sleep_time = {
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.tv_sec = current_time / AV_TIME_BASE,
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.tv_nsec =
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(current_time % AV_TIME_BASE) * 1000};
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pthread_cond_timedwait(&clock->cond, &clock->mutex,
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&sleep_time);
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aborted = *abort;
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// There is no way anyone can signal us since we are
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// the only reference
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if (clock->retain == 1)
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release = true;
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pthread_mutex_unlock(&clock->mutex);
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if (aborted || release) {
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av_log(NULL, AV_LOG_ERROR,
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"could not start "
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"slave clock as master clock "
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"was never started before "
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"being released or aborted");
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break;
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}
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}
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}
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if (release)
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ff_clock_release(&clock);
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return !release && !aborted;
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}
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struct ff_clock *ff_clock_init(void)
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{
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struct ff_clock *clock = av_mallocz(sizeof(struct ff_clock));
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if (clock == NULL)
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return NULL;
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if (pthread_mutex_init(&clock->mutex, NULL) != 0)
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goto fail;
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if (pthread_cond_init(&clock->cond, NULL) != 0)
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goto fail1;
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return clock;
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fail1:
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pthread_mutex_destroy(&clock->mutex);
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fail:
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av_free(clock);
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return NULL;
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}
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struct ff_clock *ff_clock_retain(struct ff_clock *clock)
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{
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ff_atomic_inc_long(&clock->retain);
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return clock;
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}
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struct ff_clock *ff_clock_move(struct ff_clock **clock)
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{
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struct ff_clock *retained_clock = ff_clock_retain(*clock);
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ff_clock_release(clock);
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return retained_clock;
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}
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void ff_clock_release(struct ff_clock **clock)
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{
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if (ff_atomic_dec_long(&(*clock)->retain) == 0) {
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pthread_cond_destroy(&(*clock)->cond);
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pthread_mutex_destroy(&(*clock)->mutex);
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av_free(*clock);
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}
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*clock = NULL;
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}
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