YV12toNV21, YV12toNV12, NV12toYV12, NV21toYV12, NV12toNV21, NV21toNV12

영상처리 하는님들 코드좀 공유 하세요.

 

구글링해서 하나도 안나오는거 졸라 얄밉네

 

 

출저 및 참고 : https://stackoverflow.com/questions/42000543/convert-yv12-to-nv21-yuv-ycrcb-420

 

public static byte[] YV12toNV21(final byte[] input, final byte[] output, final int width, final int height) {

    final int size = width * height;
    final int quarter = size / 4;
    final int vPosition = size; // This is where V starts
    final int uPosition = size + quarter; // This is where U starts

    System.arraycopy(input, 0, output, 0, size); // Y is same

    for (int i = 0; i < quarter; i++) {
        output[size + i*2 ] = input[vPosition + i]; // For NV21, V first
        output[size + i*2 + 1] = input[uPosition + i]; // For Nv21, U second
    }
    return output;
}


public static byte[] YV12toNV12(final byte[] input, final byte[] output, final int width, final int height) {

    final int size = width * height;
    final int quarter = size / 4;
    final int vPosition = size; // This is where V starts
    final int uPosition = size + quarter; // This is where U starts

    System.arraycopy(input, 0, output, 0, size); // Y is same

    for (int i = 0; i < quarter; i++) {
        output[size + i*2 + 1] = input[vPosition + i]; // For NV21, V first
        output[size + i*2 ] = input[uPosition + i]; // For Nv21, U second
    }
    return output;
}

 

public static byte[] NV21toYV12(final byte[] input, final byte[] output, final int width, final int height) {
    final int size = width * height;
    final int quarter = size / 4;
    final int vPosition = size; // This is where V starts
    final int uPosition = size + quarter; // This is where U starts
    System.arraycopy(input, 0, output, 0, size); // Y is same
    for (int i = 0; i < quarter; i++) {
        output[vPosition + i] = input[size + i*2 ];
        output[uPosition + i] = input[size + i*2 + 1];
    }
    return output;
}

public static byte[] NV12toYV12(final byte[] input, final byte[] output, final int width, final int height) {
    final int size = width * height;
    final int quarter = size / 4;
    final int vPosition = size; // This is where V starts
    final int uPosition = size + quarter; // This is where U starts
    System.arraycopy(input, 0, output, 0, size); // Y is same
    for (int i = 0; i < quarter; i++) {
        output[vPosition + i] = input[size + i*2 + 1];
        output[uPosition + i] = input[size + i*2 ];
    }
    return output;
}

 

 

 

 

NV21 to NV12 와 NV12 to NV21은 동일한 함수내용을 같는다.

public static byte[] NV21toNV12(final byte[] input, final byte[] output, final int width, final int height) {

    final int size = width * height;
    final int quarter = size / 4;
    System.arraycopy(input, 0, output, 0, size); // Y is same
    for (int i = 0; i < quarter; i++) {
        output[size + i*2 ] = input[size + i*2 +1];
        output[size + i*2 + 1] = input[size + i*2];
    }
    return output;
}


public static byte[] NV12toNV21(final byte[] input, final byte[] output, final int width, final int height) {

    final int size = width * height;
    final int quarter = size / 4;
    System.arraycopy(input, 0, output, 0, size); // Y is same
    for (int i = 0; i < quarter; i++) {
        output[size + i*2 ] = input[size + i*2 +1];
        output[size + i*2 + 1] = input[size + i*2];
    }
    return output;
}