一个基于ffmpeg的音视频播放器.zip

/***************************************************************************** * ijksdl_mutex.c ***************************************************************************** * * Copyright (c) 2013 Bilibili * copyright (c) 2013 Zhang Rui <bbcallen@gmail.com> * * This file is part of ijkPlayer. * * ijkPlayer is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * ijkPlayer is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with ijkPlayer; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "ijksdl_mutex.h" #include <errno.h> #include <assert.h> #include <sys/time.h> #include "ijksdl_inc_internal.h" SDL_mutex *SDL_CreateMutex(void) { SDL_mutex *mutex; mutex = (SDL_mutex *) mallocz(sizeof(SDL_mutex)); if (!mutex) return NULL; if (pthread_mutex_init(&mutex->id, NULL) != 0) { free(mutex); return NULL; } return mutex; } void SDL_DestroyMutex(SDL_mutex *mutex) { if (mutex) { pthread_mutex_destroy(&mutex->id); free(mutex); } } void SDL_DestroyMutexP(SDL_mutex **mutex) { if (mutex) { SDL_DestroyMutex(*mutex); *mutex = NULL; } } int SDL_LockMutex(SDL_mutex *mutex) { assert(mutex); if (!mutex) return -1; return pthread_mutex_lock(&mutex->id); } int SDL_UnlockMutex(SDL_mutex *mutex) { assert(mutex); if (!mutex) return -1; return pthread_mutex_unlock(&mutex->id); } SDL_cond *SDL_CreateCond(void) { SDL_cond *cond; cond = (SDL_cond *) mallocz(sizeof(SDL_cond)); if (!cond) return NULL; if (pthread_cond_init(&cond->id, NULL) != 0) { free(cond); return NULL; } return cond; } void SDL_DestroyCond(SDL_cond *cond) { if (cond) { pthread_cond_destroy(&cond->id); free(cond); } } void SDL_DestroyCondP(SDL_cond **cond) { if (cond) { SDL_DestroyCond(*cond); *cond = NULL; } } int SDL_CondSignal(SDL_cond *cond) { assert(cond); if (!cond) return -1; return pthread_cond_signal(&cond->id); } int SDL_CondBroadcast(SDL_cond *cond) { assert(cond); if (!cond) return -1; return pthread_cond_broadcast(&cond->id); } int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, uint32_t ms) { int retval; struct timeval delta; struct timespec abstime; assert(cond); assert(mutex); if (!cond || !mutex) { return -1; } gettimeofday(&delta, NULL); abstime.tv_sec = delta.tv_sec + (ms / 1000); abstime.tv_nsec = (delta.tv_usec + (ms % 1000) * 1000) * 1000; if (abstime.tv_nsec > 1000000000) { abstime.tv_sec += 1; abstime.tv_nsec -= 1000000000; } while (1) { retval = pthread_cond_timedwait(&cond->id, &mutex->id, &abstime); if (retval == 0) return 0; else if (retval == EINTR) continue; else if (retval == ETIMEDOUT) return SDL_MUTEX_TIMEDOUT; else break; } return -1; } int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) { assert(cond); assert(mutex); if (!cond || !mutex) return -1; return pthread_cond_wait(&cond->id, &mutex->id); }