ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinha...@outlook.com> | Mon Feb 24 20:43:46 2025 +0100| [79d6657e138ac4a0f52ec4eaa4f4a2fcea0a7abb] | committer: Andreas Rheinhardt
avcodec/mpeg12dec: Don't initialize unused parts of ScanTable The MPEG-1/2 decoders don't need ScanTable.raster_end (as the coefficients are unquantized as they are parsed). Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=79d6657e138ac4a0f52ec4eaa4f4a2fcea0a7abb --- libavcodec/mpeg12dec.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c index 48b35ed794..abef0a6155 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -1228,10 +1228,10 @@ static int mpeg_decode_picture_coding_extension(Mpeg1Context *s1) s->chroma_420_type = get_bits1(&s->gb); s->progressive_frame = get_bits1(&s->gb); - // We only initialize intra_scantable, as both scantables always coincide - // and all code therefore only uses the intra one. - ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, - s->alternate_scan ? ff_alternate_vertical_scan : ff_zigzag_direct); + // We only initialize intra_scantable.permutated, as this is all we use. + ff_permute_scantable(s->intra_scantable.permutated, + s->alternate_scan ? ff_alternate_vertical_scan : ff_zigzag_direct, + s->idsp.idct_permutation); /* composite display not parsed */ ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); @@ -2803,8 +2803,9 @@ static int ipu_decode_frame(AVCodecContext *avctx, AVFrame *frame, m->intra_vlc_format = !!(s->flags & 0x20); m->alternate_scan = !!(s->flags & 0x10); - ff_init_scantable(m->idsp.idct_permutation, &m->intra_scantable, - s->flags & 0x10 ? ff_alternate_vertical_scan : ff_zigzag_direct); + ff_permute_scantable(m->intra_scantable.permutated, + s->flags & 0x10 ? ff_alternate_vertical_scan : ff_zigzag_direct, + m->idsp.idct_permutation); m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3)); m->qscale = 1; _______________________________________________ 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".
