Christophe Gisquet:
> This would have also helped a bitstream reader with a cache
> of 32 bits.
> ---
> libavcodec/bitstream_template.h | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/libavcodec/bitstream_template.h b/libavcodec/bitstream_template.h
> index 3f90fc6a07..c27e8108b2 100644
> --- a/libavcodec/bitstream_template.h
> +++ b/libavcodec/bitstream_template.h
> @@ -423,8 +423,18 @@ static inline const uint8_t *BS_FUNC(align)(BSCTX *bc)
> */
> static inline int BS_FUNC(read_xbits)(BSCTX *bc, unsigned int n)
> {
> - int32_t cache = BS_FUNC(peek)(bc, 32);
> - int sign = ~cache >> 31;
> + int32_t cache;
> + int sign;
> +
> + if (n > bc->bits_valid)
> + BS_FUNC(priv_refill_32)(bc);
> +
> +#if defined(BITSTREAM_READER_LE)
> + cache = bc->bits & 0xFFFFFFFF;
> +#else
> + cache = bc->bits >> 32;
> +#endif
> + sign = ~cache >> 31;
> BS_FUNC(skip_remaining)(bc, n);
>
> return ((((uint32_t)(sign ^ cache)) >> (32 - n)) ^ sign) - sign;
Great, this function has the same issue at the end of input as read_vlc.
- 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".
