/* * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ //#define DEBUG // Ported by Vlad Stelmahovsky #include "avcodec.h" #define INCL_DOS #define INCL_DOSERRORS #define INCL_DOSDEVIOCTL #include <os2.h> typedef struct ThreadContext{ AVCodecContext *avctx; int thread; HEV work_sem; HEV done_sem; int (*func)(AVCodecContext *c, void *arg); void *arg; int ret; }ThreadContext; void thread_func(void *v){ ThreadContext *c= v; for(;;){ //printf("thread_func %X enter wait\n", (int)v); fflush(stdout); DosWaitEventSem(c->work_sem, SEM_INDEFINITE_WAIT); // WaitForSingleObject(c->work_sem, INFINITE); //printf("thread_func %X after wait (func=%X)\n", (int)v, (int)c->func); fflush(stdout); if(c->func) c->ret= c->func(c->avctx, c->arg); else return; //printf("thread_func %X signal complete\n", (int)v); fflush(stdout); DosPostEventSem(c->done_sem); // ReleaseSemaphore(c->done_sem, 1, 0); } return; } /** * free what has been allocated by avcodec_thread_init(). * must be called after decoding has finished, especially do not call while avcodec_thread_execute() is running */ void avcodec_thread_free(AVCodecContext *s){ ThreadContext *c= s->thread_opaque; int i; for(i=0; i<s->thread_count; i++){ c[i].func= NULL; DosPostEventSem(c[i].work_sem); // ReleaseSemaphore(c[i].work_sem, 1, 0); DosWaitThread((PTID)&c[i].thread,DCWW_WAIT); // WaitForSingleObject(c[i].thread, INFINITE); if(c[i].work_sem) DosCloseEventSem(c[i].work_sem);//CloseHandle(c[i].work_sem); if(c[i].done_sem) DosCloseEventSem(c[i].done_sem);//CloseHandle(c[i].done_sem); } av_freep(&s->thread_opaque); } int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){ ThreadContext *c= s->thread_opaque; int i; assert(s == c->avctx); assert(count <= s->thread_count); /* note, we can be certain that this is not called with the same AVCodecContext by different threads at the same time */ for(i=0; i<count; i++){ c[i].arg= arg[i]; c[i].func= func; c[i].ret= 12345; DosPostEventSem(c[i].work_sem); // ReleaseSemaphore(c[i].work_sem, 1, 0); } for(i=0; i<count; i++){ DosWaitEventSem(c[i].done_sem,SEM_INDEFINITE_WAIT); // WaitForSingleObject(c[i].done_sem, INFINITE); c[i].func= NULL; if(ret) ret[i]= c[i].ret; } return 0; } int avcodec_thread_init(AVCodecContext *s, int thread_count){ int i; ThreadContext *c; uint32_t threadid; s->thread_count= thread_count; assert(!s->thread_opaque); c= av_mallocz(sizeof(ThreadContext)*thread_count); s->thread_opaque= c; for(i=0; i<thread_count; i++){ //printf("init semaphors %d\n", i); fflush(stdout); c[i].avctx= s; if (DosCreateEventSem(NULL,&c[i].work_sem,DC_SEM_SHARED,0)) goto fail; if (DosCreateEventSem(NULL,&c[i].done_sem,DC_SEM_SHARED,0)) goto fail; //printf("create thread %d\n", i); fflush(stdout); // c[i].thread = (HANDLE)_beginthreadex(NULL, 0, thread_func, &c[i], 0, &threadid ); c[i].thread = _beginthread(thread_func, NULL, 0x10000, &c[i]); if( c[i].thread <= 0 ) goto fail; } //printf("init done\n"); fflush(stdout); s->execute= avcodec_thread_execute; return 0; fail: avcodec_thread_free(s); return -1; }