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avcodec/mpv_reconstruct_mb_template: Optimize always-true branch away

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There are only two mpegvideo decoders that use another
(software) pixel format than YUV420: MPEG-1/2 and
the MPEG-4 studio profile. Neither of these use this part
of the code, so one can optimize the 422 code away when
this code is compiled for the decoder.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-06-11 13:36:40 +02:00
parent c1097556c7
commit 2e5287e519
1 changed files with 2 additions and 1 deletions
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libavcodec/mpv_reconstruct_mb_template.c
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@ -172,7 +172,8 @@ void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64],
add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
if (s->chroma_y_shift) {
av_assert2(IS_ENCODER || s->chroma_y_shift);
if (!IS_ENCODER || s->chroma_y_shift) {
add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
} else {