unsigned char
Mpeg2PicHdrGetFCode


Parameters:

Mpeg2PicHdr *fh
Previously allocated and initialized Mpeg2PicHdr structure.
intback_flag
Indicates whether to retrieve forward fcodes or backward fcodes. 0 indicates forward, 1 indicates backward.
intvert_flag
Indicates whether to retrieve horizontal fcodes or vertical fcodes. 0 indicates horizontal, 1 indicates vertical.

Return value:

1 or 4 fcode values governing decoding of motion vectors.

Description:

Returns 1 of 4 fcode values which are used to govern how many bits are used to encode motion vectors. The four fcodes correspond to four different types of motion vectors (forw/bwd crossed with horiz/vert). The back_flag and vert_flag parameters are used to select which one is to be returned.


Author: Ketan Mayer-Patel Date: 4/18/00