mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-24 20:19:55 +00:00
5e4c7ca224
Necessary for systems that don't align by default to 16 bytes, required by some SSE instructions. Requires GCC >= 4.2. Based on patch by Gaël Chardon. Originally committed as revision 10106 to svn://svn.ffmpeg.org/ffmpeg/trunk
135 lines
3.8 KiB
C
135 lines
3.8 KiB
C
/*
|
|
* 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
|
|
|
|
#include "avcodec.h"
|
|
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
#include <process.h>
|
|
|
|
typedef struct ThreadContext{
|
|
AVCodecContext *avctx;
|
|
HANDLE thread;
|
|
HANDLE work_sem;
|
|
HANDLE done_sem;
|
|
int (*func)(AVCodecContext *c, void *arg);
|
|
void *arg;
|
|
int ret;
|
|
}ThreadContext;
|
|
|
|
|
|
static unsigned __stdcall attribute_align_arg thread_func(void *v){
|
|
ThreadContext *c= v;
|
|
|
|
for(;;){
|
|
//printf("thread_func %X enter wait\n", (int)v); fflush(stdout);
|
|
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 0;
|
|
//printf("thread_func %X signal complete\n", (int)v); fflush(stdout);
|
|
ReleaseSemaphore(c->done_sem, 1, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
ReleaseSemaphore(c[i].work_sem, 1, 0);
|
|
WaitForSingleObject(c[i].thread, INFINITE);
|
|
if(c[i].work_sem) CloseHandle(c[i].work_sem);
|
|
if(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;
|
|
|
|
ReleaseSemaphore(c[i].work_sem, 1, 0);
|
|
}
|
|
for(i=0; i<count; i++){
|
|
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(!(c[i].work_sem = CreateSemaphore(NULL, 0, s->thread_count, NULL)))
|
|
goto fail;
|
|
if(!(c[i].done_sem = CreateSemaphore(NULL, 0, s->thread_count, NULL)))
|
|
goto fail;
|
|
|
|
//printf("create thread %d\n", i); fflush(stdout);
|
|
c[i].thread = (HANDLE)_beginthreadex(NULL, 0, thread_func, &c[i], 0, &threadid );
|
|
if( !c[i].thread ) goto fail;
|
|
}
|
|
//printf("init done\n"); fflush(stdout);
|
|
|
|
s->execute= avcodec_thread_execute;
|
|
|
|
return 0;
|
|
fail:
|
|
avcodec_thread_free(s);
|
|
return -1;
|
|
}
|