ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinha...@outlook.com> | Thu Apr 17 19:48:05 2025 +0200| [e946ba64bf716c0f36909459516e7972d2fd600a] | committer: Andreas Rheinhardt
avcodec/vp6: Don't reload unnecessarily often in get_vlc2() The VLC trees used here have very few different codes and are therefore guaranteed to not be very deep: The AC/DC VLCs have 12 elements and therefore a depth <= 11 whereas the run VLCs have only nine elements and therefore a depth <= 8. This allows to reduce the worst-case number of reloads for reading a VLC code. Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e946ba64bf716c0f36909459516e7972d2fd600a --- libavcodec/vp6.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c index 926694ae11..de60ae93bb 100644 --- a/libavcodec/vp6.c +++ b/libavcodec/vp6.c @@ -415,7 +415,7 @@ static int vp6_parse_coeff_huffman(VP56Context *s) VP56Model *model = s->modelp; uint8_t *permute = s->idct_scantable; VLC *vlc_coeff; - int coeff, sign, coeff_idx; + int sign, coeff_idx; int b, cg, idx; int pt = 0; /* plane type (0 for Y, 1 for U or V) */ @@ -433,11 +433,11 @@ static int vp6_parse_coeff_huffman(VP56Context *s) } else { if (get_bits_left(&s->gb) <= 0) return AVERROR_INVALIDDATA; - coeff = get_vlc2(&s->gb, vlc_coeff->table, FF_HUFFMAN_BITS, 3); + int coeff = get_vlc2(&s->gb, vlc_coeff->table, FF_HUFFMAN_BITS, 2); if (coeff == 0) { if (coeff_idx) { int pt = (coeff_idx >= 6); - run += get_vlc2(&s->gb, s->runv_vlc[pt].table, FF_HUFFMAN_BITS, 3); + run += get_vlc2(&s->gb, s->runv_vlc[pt].table, FF_HUFFMAN_BITS, 1); if (run >= 9) run += get_bits(&s->gb, 6); } else _______________________________________________ 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".
