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Commit 1790bb5d authored by Ram Mohan's avatar Ram Mohan Committed by Dichen Zhang
Browse files

ultrahdr: do not select less accurate integer method during dct 

At high quality setting, less accurate integer method can have
larger psnr drops. Switch to default setting

Bug: 286617381
Test: ./libultrahdr_app -p inp_p010.yuv -y inp_420p.yuv -w 1920 -h 1080 -o 0

Change-Id: Ide126b87262e1c9a20edca7873b6ca27fc52b2cb
parent 69d1bc22

libs/ultrahdr/jpegdecoderhelper.cpp

+1 −1
Original line number Diff line number Diff line
@@ -242,7 +242,7 @@ bool JpegDecoderHelper::decode(const void* image, int length, bool decodeToRGBA) 
        cinfo.raw_data_out = TRUE;

    }



    cinfo.dct_method = JDCT_IFAST;

    cinfo.dct_method = JDCT_ISLOW;



    jpeg_start_decompress(&cinfo);

libs/ultrahdr/jpegencoderhelper.cpp

+1 −1
Original line number Diff line number Diff line
@@ -139,7 +139,7 @@ void JpegEncoderHelper::setJpegCompressStruct(int width, int height, int quality 
    jpeg_set_quality(cinfo, quality, TRUE);

    jpeg_set_colorspace(cinfo, isSingleChannel ? JCS_GRAYSCALE : JCS_YCbCr);

    cinfo->raw_data_in = TRUE;

    cinfo->dct_method = JDCT_IFAST;

    cinfo->dct_method = JDCT_ISLOW;



    if (!isSingleChannel) {

        // Configure sampling factors. The sampling factor is JPEG subsampling 420 because the