YUV420P to YV12 format conversion

I converted the YUV420P to YV12 format using the following :


The YV12 format is essentially the same as YUV420p, but it has the U and V data reversed: the Y values are followed by the V values, with the U values last.Our output is YUV420P.

Our MPEG4 Decoder's output is YUV420P. So we need to convert it as
YV12. I used the following code to convert from YUV420P to YV12.

long ulNumberOfPixels = m_iWidth * m_iHeight;
long ulUVBufferSize = (m_iWidth * m_iHeight) /4;
unsigned char ch; for(long i = 0; i < ulUVBufferSize; i++)
{
ch = pbYUVData[ulNumberOfPixels + i] ;
pbYUVData[ulNumberOfPixels + i] = pbYUVData[ ulNumberOfPixels + ulUVBufferSize + i];
pbYUVData[ ulNumberOfPixels + ulUVBufferSize + i] = ch;
}