Add a GetBitContext to H263DecContext instead. This is in preparation
for removing MpegEncContext.gb.
Also move last_resync_gb to H263DecContext.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Instead add the necessary blocks directly to H263DecContext
(only six are needed, not 12 as ff_mpv_common_init()
currently allocates).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
With the exception of mpeg4_decode_studio_mb(), all decode_mb
functions implicitly presumed that the block provided as
argument coincides with MpegEncContext.block (they zeroed the latter
and then used the former to decode the block); mpeg4_decode_studio_mb()
meanwhile did not use the provided block at all (it uses blocks of
int32_t). So remove said parameter.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This is in preparation for moving the fields only used
by H.263-based decoders from MPVContext to H263DecContext.
For now only the decode_mb function pointer has been moved
(to be able to switch said callback to use an H263DecContext*).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
It is only used to indicate to ff_h263_show_pict_info()
that we are decoding H.263+; pass this information
via a function parameter instead.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Currently identical to the H.261 and H.263 close functions
(which it replaces). It will be extended in future commits.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
They are not intended for decoders (for which there is the get_format
callback in case the user has a choice).
Also note that the list was wrong for MPEG4, because it did not contain
the high bit depth pixel formats used for studio profiles.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Of all these VLCs here, only VLC.table was really used
after init, so use the ff_vlc_init_tables API
to get rid of them.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This increases type-safety by avoiding conversions from/through void*.
It also avoids the boilerplate "AVFrame *frame = data;" line
for non-subtitle decoders.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
