ffmpeg | branch: master | Lynne <d...@lynne.ee> | Tue Feb 18 23:47:13 2025 +0100| [5cf4f145addeca84968cb2d687e5b20494fa7db8] | committer: Lynne
ffv1dec: set f->state_transition for default range coder table The table is only set when f->ac is set to CUSTOM. Setting it for default range coder tables simplifies hardware accelerator code. > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5cf4f145addeca84968cb2d687e5b20494fa7db8 --- libavcodec/ffv1_parse.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/libavcodec/ffv1_parse.c b/libavcodec/ffv1_parse.c index 81224df214..636e2c62ab 100644 --- a/libavcodec/ffv1_parse.c +++ b/libavcodec/ffv1_parse.c @@ -104,6 +104,11 @@ int ff_ffv1_read_extra_header(FFV1Context *f) if (f->ac == AC_RANGE_CUSTOM_TAB) { for (int i = 1; i < 256; i++) f->state_transition[i] = ff_ffv1_get_symbol(&c, state, 1) + c.one_state[i]; + } else { + RangeCoder rc; + ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8); + for (int i = 1; i < 256; i++) + f->state_transition[i] = rc.one_state[i]; } f->colorspace = ff_ffv1_get_symbol(&c, state, 0); //YUV cs type @@ -219,6 +224,11 @@ int ff_ffv1_parse_header(FFV1Context *f, RangeCoder *c, uint8_t *state) } f->state_transition[i] = st; } + } else { + RangeCoder rc; + ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8); + for (int i = 1; i < 256; i++) + f->state_transition[i] = rc.one_state[i]; } colorspace = ff_ffv1_get_symbol(c, state, 0); //YUV cs type _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
