It more directly shows that ff_flac_decode_frame_header() does not
modify the AVCodecContext given to it at all; and it would not be
allowed to do so, given that it is used by the parser when it is
still unknown whether said frame header is even valid.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
(The FLAC parser currently ignores the streaminfo block;
therefore some of this is decoder-only. Given that the FLAC
parser should probably use the streaminfo block, this stuff
is moved to flac_parse.h.)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>