高效的把摄像头data数据转换为bitmap

最新推荐文章于 2025-05-16 16:17:24 发布

ChloeDimen

最新推荐文章于 2025-05-16 16:17:24 发布

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分类专栏：音视频开发

本文链接：https://blog.youkuaiyun.com/jim19890923/article/details/95634241

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博客给出了FastYUVtoRGB类的代码，该类可实现YUV到RGB的转换。包含创建RenderScript、ScriptIntrinsicYuvToRGB等操作，还提供了convertYUVtoRGB方法进行转换。此外，给出了nv21ToBitmap方法，同时指出存在native级内存泄漏及修改系统源码的参考链接。

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public class FastYUVtoRGB {
    private RenderScript rs;
    private ScriptIntrinsicYuvToRGB yuvToRgbIntrinsic;
    private Type.Builder yuvType, rgbaType;
    private Allocation in, out;

    public FastYUVtoRGB(Context context) {
        rs = RenderScript.create(context);
        yuvToRgbIntrinsic = ScriptIntrinsicYuvToRGB.create(rs, Element.U8_4(rs));
    }


    public Bitmap convertYUVtoRGB(byte[] yuvData, int width, int height) {
        if (yuvType == null) {
            yuvType = new Type.Builder(rs, Element.U8(rs)).setX(yuvData.length);
            in = Allocation.createTyped(rs, yuvType.create(), Allocation.USAGE_SCRIPT);

            rgbaType = new Type.Builder(rs, Element.RGBA_8888(rs)).setX(width).setY(height);
            out = Allocation.createTyped(rs, rgbaType.create(), Allocation.USAGE_SCRIPT);
        }
        in.copyFrom(yuvData);
        yuvToRgbIntrinsic.setInput(in);
        yuvToRgbIntrinsic.forEach(out);
        Bitmap bmpout = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        out.copyTo(bmpout);
        return bmpout;
    }
    //存在native级别的内存泄漏，修改系统源码。参照下面的链接修改
//https://blog.youkuaiyun.com/q979713444/article/details/80446404
    private static Bitmap nv21ToBitmap(byte[] nv21, int width, int height) {
        Bitmap bitmap = null;
        try {
            YuvImage image = new YuvImage(nv21, ImageFormat.NV21, width, height, null);
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            image.compressToJpeg(new Rect(0, 0, width, height), 80, stream);
            bitmap = BitmapFactory.decodeByteArray(stream.toByteArray(), 0, stream.size());
            stream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return bitmap;
    }

}