private byte[] rotateYUV420Degree90(byte[] data, int imageWidth, int imageHeight)
{final byte [] yuv = new byte[previewWidth*previewHeight*3/2];// Rotate the Y lumaint i = 0;for(int x = 0;x < imageWidth;x++){for(int y = imageHeight-1;y >= 0;y--){yuv[i] = data[y*imageWidth+x];i++;}}// Rotate the U and V color componentsi = imageWidth*imageHeight*3/2-1;for(int x = imageWidth-1;x > 0;x=x-2){for(int y = 0;y < imageHeight/2;y++){yuv[i] = data[(imageWidth*imageHeight)+(y*imageWidth)+x];i--;yuv[i] = data[(imageWidth*imageHeight)+(y*imageWidth)+(x-1)];i--;}}return yuv;
}private byte[] rotateYUV420Degree180(byte[] data, int imageWidth, int imageHeight)
{byte [] yuv = new byte[imageWidth*imageHeight*3/2];int i = 0;int count = 0;for (i = imageWidth * imageHeight - 1; i >= 0; i--) {yuv[count] = data[i];count++;}i = imageWidth * imageHeight * 3 / 2 - 1;for (i = imageWidth * imageHeight * 3 / 2 - 1; i >= imageWidth* imageHeight; i -= 2) {yuv[count++] = data[i - 1];yuv[count++] = data[i];}return yuv;
}private byte[] rotateYUV420Degree270(byte[] data, int imageWidth, int imageHeight)
{final byte [] yuv = new byte[previewWidth*previewHeight*3/2];int wh = 0;int uvHeight = 0;if(imageWidth != 0 || imageHeight != 0){wh = imageWidth * imageHeight;uvHeight = imageHeight >> 1;//uvHeight = height / 2}//旋转Yint k = 0;for(int i = 0; i < imageWidth; i++) {int nPos = 0;for(int j = 0; j < imageHeight; j++) {yuv[k] = data[nPos + i];k++;nPos += imageWidth;}}for(int i = 0; i < imageWidth; i+=2){int nPos = wh;for(int j = 0; j < uvHeight; j++) {yuv[k] = data[nPos + i];yuv[k + 1] = data[nPos + i + 1];k += 2;nPos += imageWidth;}}

}

public byte[] cropYUV420(byte[] data,int imageW,int imageH,int newImageH){int cropH;int i,j,count,tmp;byte[] yuv = new byte[imageW*newImageH*3/2];cropH = (imageH - newImageH)/2;count = 0;for(j=cropH;j<cropH+newImageH;j++){for(i=0;i<imageW;i++){yuv[count++] = data[j*imageW+i];}}//Cr Cbtmp = imageH+cropH/2;for(j=tmp;j<tmp + newImageH/2;j++){for(i=0;i<imageW;i++){yuv[count++] = data[j*imageW+i];}}return yuv;
}