FFMpeg显示视频图像时候的内存问题

圣诞老人123 2011-01-28 05:31:06

我启动一个线程做图像解码但是内存不断飙升请大牛看看我代码的问题谢谢了

---------------------------------------------------------线程代码--------------------------------------------

int video_Decode( void* ptr )
{
PlayerData* data = ( PlayerData* )ptr;
AVPacket pk1;
AVPacket* packet = &pk1;
AVFrame* frame;
int complete;
int len01;
double pts;

SDL_Overlay *bmp;
SDL_Rect rect;

frame = avcodec_alloc_frame();

if( data == NULL )
return -1;
data->pVCodecCtx->get_buffer = our_get_buffer;
data->pVCodecCtx->release_buffer = our_release_buffer;

for( ;; )
{
if( packet_queue_get( &(data->videoq), packet , 1 ) < 0 )
{
break;
}

global_video_pkt_pts = packet->pts;
len01 = avcodec_decode_video( data->pVCodecCtx, frame, &complete, packet->data, packet->size );

if( frame->opaque && *(uint64_t*)frame->opaque != AV_NOPTS_VALUE)
{
pts = *(uint64_t *)frame->opaque;
}else
{
pts = 0;
}

pts *= av_q2d( data->pVcodecstm->time_base );

if( complete )
{
bmp = SDL_CreateYUVOverlay(data->pVCodecCtx->width,
data->pVCodecCtx->height,
SDL_YV12_OVERLAY,
data->screen);
SDL_LockYUVOverlay(bmp);

AVPicture pict;
pict.data[0] = bmp->pixels[0];
pict.data[1] = bmp->pixels[2];
pict.data[2] = bmp->pixels[1];

pict.linesize[0] = bmp->pitches[0];
pict.linesize[1] = bmp->pitches[2];
pict.linesize[2] = bmp->pitches[1];

// Convert the image into YUV format that SDL uses
SwsContext *ctx = NULL;
ctx = sws_getContext(
data->pVCodecCtx->width,
data->pVCodecCtx->height,
data->pVCodecCtx->pix_fmt,
data->pVCodecCtx->width,
data->pVCodecCtx->height,
PIX_FMT_YUV420P,
SWS_BICUBIC, NULL, NULL, NULL);
sws_scale( ctx,frame->data,frame->linesize,0,data->pVCodecCtx->height,((AVPicture*)&pict)->data,((AVPicture*)&pict)->linesize);

SDL_UnlockYUVOverlay(bmp);
/**/
rect.x = 0;
rect.y = 0;
rect.w = data->pVCodecCtx->width * 2;
rect.h = data->pVCodecCtx->height * 2;
SDL_DisplayYUVOverlay(bmp, &rect);

sws_freeContext( ctx );
SDL_free( bmp );
SDL_free( &pict );

//得到一张frame转为picture
/**/
}

av_free_packet( packet );
}
av_free( frame );
return 0;
}

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