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  • Does this code contain a potential memory leak ?

    26 juillet 2017, par Johnnylin

    Here is the code :

    cv::Mat YV12ToBRG24_FFmpeg(unsigned char* pYUV, int width,int height)
    
{
    
    if (width < 1 || height < 1 || pYUV == nullptr){
    
        return cv::Mat();
    
    }
    

    
    cv::Mat result(height,width,CV_8UC3, cv::Scalar::all(0));
    
    uchar* pBGR24 = result.data;
    

    
    AVFrame* pFrameYUV = av_frame_alloc();
    
    pFrameYUV->width = width;
    
    pFrameYUV->height = height;
    
    pFrameYUV->format = AV_PIX_FMT_YUV420P;
    
    av_image_fill_arrays(pFrameYUV->data, pFrameYUV->linesize, pYUV, AV_PIX_FMT_YUV420P, width, height, 1);
    

    
    //U,V exchange
    
    uint8_t * ptmp=pFrameYUV->data[1];
    
    pFrameYUV->data[1]=pFrameYUV->data[2];
    
    pFrameYUV->data[2]=ptmp;
    

    
    AVFrame* pFrameBGR = av_frame_alloc();
    
    pFrameBGR->width = width;
    
    pFrameBGR->height = height;
    
    pFrameBGR->format = AV_PIX_FMT_BGR24;
    
    av_image_fill_arrays(pFrameBGR->data, pFrameBGR->linesize, pBGR24, AV_PIX_FMT_BGR24, width, height, 1);
    

    
    struct SwsContext* imgCtx = nullptr;
    
    imgCtx = sws_getContext(width,height,AV_PIX_FMT_YUV420P,width,height,AV_PIX_FMT_BGR24,SWS_BILINEAR,0,0,0);
    
    if (imgCtx != nullptr){
    
        sws_scale(imgCtx,pFrameYUV->data,pFrameYUV->linesize,0,height,pFrameBGR->data,pFrameBGR->linesize);
    
        sws_freeContext(imgCtx);
    
        imgCtx = nullptr;
    
        ptmp = nullptr;
    
        pBGR24 = nullptr;
    
        av_frame_free(&pFrameYUV);
    
        av_frame_free(&pFrameBGR);
    
        return result;
    
    }
    
    else{
    
        sws_freeContext(imgCtx);
    
        imgCtx = nullptr;
    
        ptmp = nullptr;
    
        pBGR24 = nullptr;
    
        av_frame_free(&pFrameYUV);
    
        av_frame_free(&pFrameBGR);
    
        return cv::Mat();
    
    }
    
}

    This function is called every 40 ms (25 fps) and I saw a significant memory increase after several days(like 12GB). But if I ran this code for hours, the memory leak problem would not be obvious enough to be observed.

    Can anyone help ?
    Thanks.

  • avformat/hevc : Fix potential leak in case of ff_hevc_annexb2mp4_buf failure

    23 janvier 2020, par Andreas Rheinhardt
    avformat/hevc : Fix potential leak in case of ff_hevc_annexb2mp4_buf failure

    ff_hevc_annexb2mp4_buf() could indicate an error, yet leave cleaning
    
after itself to the caller, so that a caller could not simply return the
    
error, but had to free the buffer first.
    

    (Given that all current callers have set filter_ps = 0, this error can
    
currently not be triggered.)
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    
Signed-off-by : James Almer <jamrial@gmail.com>
    • [DH] libavformat/hevc.c
    • [DH] libavformat/hevc.h

  • lavc/vaapi_{decode, av1} : Fix memory leak in fail codepath

    1er juillet 2024, par Fei Wang
    lavc/vaapi_decode, av1 : Fix memory leak in fail codepath

    Signed-off-by : Fei Wang <fei.w.wang@intel.com>
    • [DH] libavcodec/vaapi_av1.c
    • [DH] libavcodec/vaapi_decode.c

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