已經(jīng)有很多文章介紹Image對象,這里不再多解釋.

寫在這里一是為了做個筆記記錄,二是查了好多資料確實沒有找到Y(jié)UV_420_888轉(zhuǎn)換YUYV的方法,希望幫助更多人吧.

public static byte[] getYUYVFromImage420(Image image) {
    try {
        //獲取源數(shù)據(jù)绣檬，如果是YUV格式的數(shù)據(jù)planes.length = 3
        //plane[i]里面的實際數(shù)據(jù)可能存在byte[].length <= capacity (緩沖區(qū)總大小)
        final Image.Plane[] planes = image.getPlanes();

        //數(shù)據(jù)有效寬度嗽测，一般的痛单，圖片width <= rowStride乏矾，這也是導(dǎo)致byte[].length <= capacity的原因
        //所以我們只取width部分
        int width = image.getWidth();
        int height = image.getHeight();
        //此處用來裝填最終的YUV數(shù)據(jù)，需要2倍的圖片大小孔庭，因為Y U V 比例為 4:2:2
        byte[] yuvBytes = new byte[width * height * ImageFormat.getBitsPerPixel(ImageFormat.YUV_422_888) / 8];

        //臨時存儲y u v數(shù)據(jù)的
        byte[] yBytes = new byte[width * height];

        //--分離Y數(shù)據(jù)
        ByteBuffer buffer = planes[0].getBuffer();
        buffer.get(yBytes);


        int uPixelsStride, vPixelsStride;
        //--分離U數(shù)據(jù)
        uPixelsStride = planes[1].getPixelStride();
        buffer = planes[1].getBuffer();
        byte[] uTempBytes = new byte[buffer.capacity()];
        buffer.get(uTempBytes);

        vPixelsStride = planes[2].getPixelStride();
        //--分離V數(shù)據(jù)
        buffer = planes[2].getBuffer();
        byte[] vTempBytes = new byte[buffer.capacity()];
        buffer.get(vTempBytes);

        int ySrcIndex = 0;
        int uSrcIndex = 0;
        int vSrcIndex = 0;

        int yDstIndex = 0;

        for (int j = 0; j < height / 2; j++) {
            int uvWidth = width;
            for (int k = 0; k < uvWidth / 2; k++) {
                // Y
                yuvBytes[yDstIndex] = yBytes[ySrcIndex];
                yuvBytes[yDstIndex + uvWidth * 2] = yBytes[ySrcIndex + uvWidth];
                yDstIndex++;
                ySrcIndex++;

                // U
                yuvBytes[yDstIndex] = uTempBytes[uSrcIndex];
                yuvBytes[yDstIndex + uvWidth * 2] = uTempBytes[uSrcIndex];
                yDstIndex++;

                // Y
                yuvBytes[yDstIndex] = yBytes[ySrcIndex];
                yuvBytes[yDstIndex + uvWidth * 2] = yBytes[ySrcIndex + uvWidth];
                yDstIndex++;
                ySrcIndex++;

                // V
                yuvBytes[yDstIndex] = vTempBytes[vSrcIndex];
                yuvBytes[yDstIndex + uvWidth * 2] = vTempBytes[vSrcIndex];
                yDstIndex++;

                uSrcIndex += uPixelsStride;
                vSrcIndex += vPixelsStride;
            }
            yDstIndex += uvWidth * 2;
            ySrcIndex += uvWidth;
        }

        image.close();
        return yuvBytes;
    } catch (final Exception e) {
        if (image != null) {
            image.close();
        }
        Log.e("ArMn", android.util.Log.getStackTraceString(e));
    }
    return null;
}