package com.basic.security.utils;
|
|
public class RotateUtil {
|
//
|
// public static byte[] rotateNV21(final byte[] yuv,
|
// final int width,
|
// final int height,
|
// final int rotation) {
|
// if (rotation == 0) return yuv;
|
// if (rotation % 90 != 0 || rotation < 0 || rotation > 270) {
|
// throw new IllegalArgumentException("0 <= rotation < 360, rotation % 90 == 0");
|
// }
|
//
|
// final byte[] output = new byte[yuv.length];
|
// final int frameSize = width * height;
|
// final boolean swap = rotation % 180 != 0;
|
// final boolean xflip = rotation % 270 != 0;
|
// final boolean yflip = rotation >= 180;
|
//
|
// for (int j = 0; j < height; j++) {
|
// for (int i = 0; i < width; i++) {
|
// final int yIn = j * width + i;
|
// final int uIn = frameSize + (j >> 1) * width + (i & ~1);
|
// final int vIn = uIn + 1;
|
//
|
// final int wOut = swap ? height : width;
|
// final int hOut = swap ? width : height;
|
// final int iSwapped = swap ? j : i;
|
// final int jSwapped = swap ? i : j;
|
// final int iOut = xflip ? wOut - iSwapped - 1 : iSwapped;
|
// final int jOut = yflip ? hOut - jSwapped - 1 : jSwapped;
|
//
|
// final int yOut = jOut * wOut + iOut;
|
// final int uOut = frameSize + (jOut >> 1) * wOut + (iOut & ~1);
|
// final int vOut = uOut + 1;
|
//
|
// output[yOut] = (byte)(0xff & yuv[yIn]);
|
// output[uOut] = (byte)(0xff & yuv[uIn]);
|
// output[vOut] = (byte)(0xff & yuv[vIn]);
|
// }
|
// }
|
// return output;
|
// }
|
|
byte[] yuv3;
|
public byte[] rotateYUV420Degree90(byte[] data, int imageWidth, int imageHeight) {
|
if (yuv3 == null) {
|
yuv3 = new byte[imageWidth * imageHeight * 3 / 2];
|
}
|
int i = 0;
|
for(int x = 0;x < imageWidth;x++)
|
{
|
for(int y = imageHeight-1;y >= 0;y--)
|
{
|
yuv3[i] = data[y*imageWidth+x];
|
i++;
|
}
|
}
|
i = imageWidth*imageHeight*3/2-1;
|
for(int x = imageWidth-1;x > 0;x=x-2)
|
{
|
for(int y = 0;y < imageHeight/2;y++)
|
{
|
yuv3[i] = data[(imageWidth*imageHeight)+(y*imageWidth)+x];
|
i--;
|
yuv3[i] = data[(imageWidth*imageHeight)+(y*imageWidth)+(x-1)];
|
i--;
|
}
|
}
|
return yuv3;
|
}
|
|
|
byte[] yuv2;
|
public byte[] rotateYUV420Degree180(byte[] data, int imageWidth, int imageHeight) {
|
if (yuv2 == null) {
|
yuv2 = new byte[imageWidth * imageHeight * 3 / 2];
|
}
|
int i = 0;
|
int count = 0;
|
for (i = imageWidth * imageHeight - 1; i >= 0; i--) {
|
yuv2[count] = data[i];
|
count++;
|
}
|
i = imageWidth * imageHeight * 3 / 2 - 1;
|
for (i = imageWidth * imageHeight * 3 / 2 - 1; i >= imageWidth
|
* imageHeight; i -= 2) {
|
yuv2[count++] = data[i - 1];
|
yuv2[count++] = data[i];
|
}
|
return yuv2;
|
}
|
|
byte[] yuv1;
|
public byte[] rotateYUV420Degree270(byte[] data, int imageWidth,
|
int imageHeight) {
|
if (yuv1 == null) {
|
yuv1 = new byte[imageWidth * imageHeight * 3 / 2];
|
}
|
int nWidth = 0, nHeight = 0;
|
int wh = 0;
|
int uvHeight = 0;
|
if (imageWidth != nWidth || imageHeight != nHeight) {
|
nWidth = imageWidth;
|
nHeight = imageHeight;
|
wh = imageWidth * imageHeight;
|
uvHeight = imageHeight >> 1;
|
}
|
int k = 0;
|
for (int i = 0; i < imageWidth; i++) {
|
int nPos = 0;
|
for (int j = 0; j < imageHeight; j++) {
|
yuv1[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++) {
|
yuv1[k] = data[nPos + i];
|
yuv1[k + 1] = data[nPos + i + 1];
|
k += 2;
|
nPos += imageWidth;
|
}
|
}
|
return rotateYUV420Degree180(yuv1, imageWidth, imageHeight);
|
}
|
}
|
