@param ic media file handle
@param last the last found program, the search will start after this
program, or from the beginning if it is NULL
@param s stream index
@return the next program which belongs to s, NULL if no program is found or
the last program is not among the programs of ic.
Find the programs which belong to a given stream.
@param ic media file handle @param last the last found program, the search will start after this program, or from the beginning if it is NULL @param s stream index @return the next program which belongs to s, NULL if no program is found or the last program is not among the programs of ic.