java YV12 转化代码

private void YV12Resize(byte[] pSrc,Point szSrc,byte[] pDst,Point szDst){ int srcPitchY=szSrc.x,srcPitchUV=szSrc.x/2,dstPitchY=szDst.x,dstPitchUV=szDst.x/2; int rateX=(szSrc.x<<16)/szDst.x; int rateY=(szSrc.y<<16)/szDst.y; for (int i=0;i<szDst.y;i++) { int srcY=i*rateY>>16; for (int j=0;j<szDst.x;j++) { int srcX=j*rateX>>16; pDst[dstPitchY * i + j] = pSrc[srcY*srcPitchY + srcX];//*(pSrcYLine+srcX); } } for (int i=0;i<szDst.y/2;i++) { int srcY=i*rateY>>16; for (int j=0;j<szDst.x/2;j++) { int srcX=j*rateX>>16; pDst[dstPitchY*szDst.y+i*dstPitchUV + j] = pSrc[srcPitchY*szSrc.y+srcY*srcPitchUV + srcX];//*(pSrcVLine+srcX); pDst[dstPitchY*szDst.y+i*dstPitchUV + dstPitchUV*szDst.y/2 + j]= pSrc[srcPitchY*szSrc.y+srcY*srcPitchUV + srcPitchUV*szSrc.y/2 + srcX]; } } } // eg. private void test(){ byte[] resizeYV12 = new byte[destWidth * destHeight * 3 / 2]; Point pointSrc = new Point(mSize.width, mSize.height); try { YV12Resize(mData, pointSrc, resizeYV12, new Point(destWidth, destHeight)); } catch (Exception e) { // TODO: handle exception return null; } } // YV12 To NV21 private void YV12toNV21(final byte[] input, final byte[] output, final int width, final int height) { long startMs = System.currentTimeMillis(); final int frameSize = width * height; final int qFrameSize = frameSize / 4; final int tempFrameSize = frameSize * 5 / 4; System.arraycopy(input, 0, output, 0, frameSize); // Y for (int i = 0; i < qFrameSize; i++) { output[frameSize + i * 2] = input[frameSize + i]; // Cb (U) output[frameSize + i * 2 + 1] = input[tempFrameSize + i]; // Cr (V) } } //I420 To NV21 private void I420ToNV21(final byte[] input, final byte[] output, final int width, final int height) { //long startMs = System.currentTimeMillis(); final int frameSize = width * height; final int qFrameSize = frameSize / 4; final int tempFrameSize = frameSize * 5 / 4; System.arraycopy(input, 0, output, 0, frameSize); // Y for (int i = 0; i < qFrameSize; i++) { output[frameSize + i * 2] = input[tempFrameSize + i]; // Cb (U) output[frameSize + i * 2 + 1] = input[frameSize + i]; // Cr (V) } } public static Bitmap NV21ToBitmap(byte[] data, int previewWidth, int previewHeight) { YuvImage yuvimage = new YuvImage( data, ImageFormat.NV21, previewWidth, previewHeight, null); ByteArrayOutputStream baos = new ByteArrayOutputStream(); yuvimage.compressToJpeg(new Rect(0, 0, previewWidth, previewHeight), 100, baos);// 80--JPG图片的质量[0-100],100最高 byte[] rawImage = baos.toByteArray(); //将rawImage转换成bitmap BitmapFactory.Options options = new BitmapFactory.Options(); options.inPreferredConfig = Bitmap.Config.RGB_565; Bitmap bitmap = BitmapFactory.decodeByteArray(rawImage, 0, rawImage.length, options); return bitmap; } public static byte[] flipYUV420(byte[] data, int imageWidth, int imageHeight) { byte[] yuv = new byte[imageWidth * imageHeight * 3 / 2]; int i; int count = 0; for (i = imageWidth * imageHeight - 1; i >= 0; i--) { yuv[count] = data[i]; count++; } for (i = imageWidth * imageHeight * 3 / 2 - 1; i >= imageWidth * imageHeight; i -= 2) { yuv[count++] = data[i - 1]; yuv[count++] = data[i]; } return yuv; }