1/* 2 * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20//#define DEBUG 21 22// Ported by Vlad Stelmahovsky 23 24#include "avcodec.h" 25 26#define INCL_DOS 27#define INCL_DOSERRORS 28#define INCL_DOSDEVIOCTL 29#include <os2.h> 30 31typedef struct ThreadContext{ 32 AVCodecContext *avctx; 33 int thread; 34 HEV work_sem; 35 HEV done_sem; 36 int (*func)(AVCodecContext *c, void *arg); 37 void *arg; 38 int ret; 39}ThreadContext; 40 41 42static void attribute_align_arg thread_func(void *v){ 43 ThreadContext *c= v; 44 45 for(;;){ 46 //printf("thread_func %X enter wait\n", (int)v); fflush(stdout); 47 DosWaitEventSem(c->work_sem, SEM_INDEFINITE_WAIT); 48// WaitForSingleObject(c->work_sem, INFINITE); 49//printf("thread_func %X after wait (func=%X)\n", (int)v, (int)c->func); fflush(stdout); 50 if(c->func) 51 c->ret= c->func(c->avctx, c->arg); 52 else 53 return; 54 //printf("thread_func %X signal complete\n", (int)v); fflush(stdout); 55 DosPostEventSem(c->done_sem); 56// ReleaseSemaphore(c->done_sem, 1, 0); 57 } 58 59 return; 60} 61 62/** 63 * free what has been allocated by avcodec_thread_init(). 64 * must be called after decoding has finished, especially do not call while avcodec_thread_execute() is running 65 */ 66void avcodec_thread_free(AVCodecContext *s){ 67 ThreadContext *c= s->thread_opaque; 68 int i; 69 70 for(i=0; i<s->thread_count; i++){ 71 72 c[i].func= NULL; 73 DosPostEventSem(c[i].work_sem); 74 // ReleaseSemaphore(c[i].work_sem, 1, 0); 75 DosWaitThread((PTID)&c[i].thread,DCWW_WAIT); 76// WaitForSingleObject(c[i].thread, INFINITE); 77 if(c[i].work_sem) DosCloseEventSem(c[i].work_sem);//CloseHandle(c[i].work_sem); 78 if(c[i].done_sem) DosCloseEventSem(c[i].done_sem);//CloseHandle(c[i].done_sem); 79 } 80 81 av_freep(&s->thread_opaque); 82} 83 84static int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){ 85 ThreadContext *c= s->thread_opaque; 86 int i; 87 88 assert(s == c->avctx); 89 assert(count <= s->thread_count); 90 91 /* note, we can be certain that this is not called with the same AVCodecContext by different threads at the same time */ 92 93 for(i=0; i<count; i++){ 94 95 c[i].arg= (char*)arg + i*size; 96 c[i].func= func; 97 c[i].ret= 12345; 98 99 DosPostEventSem(c[i].work_sem); 100// ReleaseSemaphore(c[i].work_sem, 1, 0); 101 } 102 for(i=0; i<count; i++){ 103 DosWaitEventSem(c[i].done_sem,SEM_INDEFINITE_WAIT); 104// WaitForSingleObject(c[i].done_sem, INFINITE); 105 106 c[i].func= NULL; 107 if(ret) ret[i]= c[i].ret; 108 } 109 return 0; 110} 111 112int avcodec_thread_init(AVCodecContext *s, int thread_count){ 113 int i; 114 ThreadContext *c; 115 uint32_t threadid; 116 117 s->thread_count= thread_count; 118 119 if (thread_count <= 1) 120 return 0; 121 122 assert(!s->thread_opaque); 123 c= av_mallocz(sizeof(ThreadContext)*thread_count); 124 s->thread_opaque= c; 125 126 for(i=0; i<thread_count; i++){ 127//printf("init semaphors %d\n", i); fflush(stdout); 128 c[i].avctx= s; 129 130 if (DosCreateEventSem(NULL,&c[i].work_sem,DC_SEM_SHARED,0)) 131 goto fail; 132 if (DosCreateEventSem(NULL,&c[i].done_sem,DC_SEM_SHARED,0)) 133 goto fail; 134 135//printf("create thread %d\n", i); fflush(stdout); 136// c[i].thread = (HANDLE)_beginthreadex(NULL, 0, thread_func, &c[i], 0, &threadid ); 137 c[i].thread = _beginthread(thread_func, NULL, 0x10000, &c[i]); 138 if( c[i].thread <= 0 ) goto fail; 139 } 140//printf("init done\n"); fflush(stdout); 141 142 s->execute= avcodec_thread_execute; 143 144 return 0; 145fail: 146 avcodec_thread_free(s); 147 return -1; 148} 149