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/*
* 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 St, 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;
}
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