Andreas Rheinhardt:
> The VLC for the macroblock address increment uses nine bits;
> yet there is no code with this length: All codes are either shorter or
> longer. So one can make the table smaller without changing the amount of
> codes that need more than one round of parsing.
>
> Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com>
> ---
> libavcodec/h261dec.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/libavcodec/h261dec.c b/libavcodec/h261dec.c
> index 817453f60c..2b3408d7b3 100644
> --- a/libavcodec/h261dec.c
> +++ b/libavcodec/h261dec.c
> @@ -35,7 +35,7 @@
> #include "h261.h"
> #include "internal.h"
>
> -#define H261_MBA_VLC_BITS 9
> +#define H261_MBA_VLC_BITS 8
> #define H261_MTYPE_VLC_BITS 6
> #define H261_MV_VLC_BITS 7
> #define H261_CBP_VLC_BITS 9
> @@ -52,7 +52,7 @@ static av_cold void h261_decode_init_static(void)
> {
> INIT_VLC_STATIC(&h261_mba_vlc, H261_MBA_VLC_BITS, 35,
> ff_h261_mba_bits, 1, 1,
> - ff_h261_mba_code, 1, 1, 662);
> + ff_h261_mba_code, 1, 1, 540);
> INIT_VLC_STATIC(&h261_mtype_vlc, H261_MTYPE_VLC_BITS, 10,
> ff_h261_mtype_bits, 1, 1,
> ff_h261_mtype_code, 1, 1, 80);
>
Will apply tomorrow unless there are objections.
- Andreas
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
