[Theora-dev] question from beginner (YCbCr to RGB)

[Ralph Giles]

On Tue, Mar 15, 2005 at 10:06:42AM +0500, LS PLOTINKA wrote:

> I need help with convert yuv_buffer data (YCbCr) to RGB without SDL.

You need to loop over each row of the video buffer separately, and
advance the Y and U,V pointers by their respective strides between
rows. You're also not taking into account the chroma subsampling:
the CR and CB values may have only 1/2 or 1/4 the number of pixels
of the Y and RGB values.

HTH,
 -r