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>
Several fields are not used by any generic code and can therefore
be moved to more specialized contexts.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
For all VLCs here, the number of bits of the VLC is write-only,
because it is hardcoded at the call site. Therefore one can replace
these VLC structures with the only thing that is actually used:
The pointer to the VLCElem table. And in some cases one can even
avoid this.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
VC1 shares some VLCs with MSMPEG-4, but vc1_block.c
simply duplicates the defines instead of including
the appropriate headers; furthermore, use a proper
prefix for these defines: DC_VLC_BITS is also used
by other codecs.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The msmpeg4 decoders/encoders share a common set of prerequisites,
ergo it makes sense to use common subsystems for them. This also
allows to remove the CONFIG_MSMPEG4_DECODER/ENCODER ad-hoc defines
(which violated the CONFIG_ namespace).
Reviewed-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
