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thread mess check for avcodec_open/close()

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Originally committed as revision 4472 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-07-25 14:35:01 +00:00
parent 91d44ffc9a
commit ddebfb15dc
1 changed files with 25 additions and 6 deletions
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31
libavcodec/utils.c
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@ -68,6 +68,8 @@ const uint8_t ff_reverse[256]={
0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
};
static int volatile entangled_thread_counter=0;
void avcodec_default_free_buffers(AVCodecContext *s);
void *av_mallocz(unsigned int size)
@ -522,10 +524,16 @@ AVFrame *avcodec_alloc_frame(void){
int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
{
int ret;
int ret= -1;
entangled_thread_counter++;
if(entangled_thread_counter != 1){
av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
goto end;
}
if(avctx->codec)
return -1;
goto end;
avctx->codec = codec;
avctx->codec_id = codec->id;
@ -533,7 +541,7 @@ int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
if (codec->priv_data_size > 0) {
avctx->priv_data = av_mallocz(codec->priv_data_size);
if (!avctx->priv_data)
return -ENOMEM;
goto end;
} else {
avctx->priv_data = NULL;
}
@ -545,15 +553,18 @@ int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
av_freep(&avctx->priv_data);
return -1;
goto end;
}
ret = avctx->codec->init(avctx);
if (ret < 0) {
av_freep(&avctx->priv_data);
return ret;
goto end;
}
return 0;
ret=0;
end:
entangled_thread_counter--;
return ret;
}
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
@ -670,11 +681,19 @@ int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
int avcodec_close(AVCodecContext *avctx)
{
entangled_thread_counter++;
if(entangled_thread_counter != 1){
av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
entangled_thread_counter--;
return -1;
}
if (avctx->codec->close)
avctx->codec->close(avctx);
avcodec_default_free_buffers(avctx);
av_freep(&avctx->priv_data);
avctx->codec = NULL;
entangled_thread_counter--;
return 0;
}