YUV图像转换java

// 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)

}

}

//YV12Resize

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>16;for (int j=0;j>16;pDst[dstPitchY * i + j] = pSrc[srcY*srcPitchY + srcX];//*(pSrcYLine+srcX);}}for (int i=0;i>16;for (int j=0;j>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;

}

}