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| author | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2024-06-02 07:22:48 +0200 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2024-06-20 18:58:38 +0200 |
| commit | 18f1aca3e8ac550a83a293cb0a210f9df1a8a5d1 (patch) | |
| tree | 650654dc44e8c4722a7e12e783239d47303290b0 /libavcodec/h263dec.c | |
| parent | 091d00663721d28d926a835d554c2f7dfdd064b6 (diff) | |
| download | ffmpeg-18f1aca3e8ac550a83a293cb0a210f9df1a8a5d1.tar.gz | |
avcodec/mpegvideo_dec: Set dct_unquantize ptrs only once when possible
Everything except dct_unquantize_intra for MPEG-4 need only
be set once.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/h263dec.c')
| -rw-r--r-- | libavcodec/h263dec.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index eee7978452..666675fcf1 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -110,6 +110,9 @@ av_cold int ff_h263_decode_init(AVCodecContext *avctx) avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; break; case AV_CODEC_ID_MPEG4: + // dct_unquantize_inter is only used with MPEG-2 quantizers, + // so we can already set dct_unquantize_inter here once and for all. + s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter; break; case AV_CODEC_ID_MSMPEG4V1: s->h263_pred = 1; @@ -523,6 +526,11 @@ retry: goto retry; if (s->studio_profile != (s->idsp.idct == NULL)) ff_mpv_idct_init(s); + if (s->mpeg_quant) { + s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra; + } else { + s->dct_unquantize_intra = s->dct_unquantize_h263_intra; + } } /* After H.263 & MPEG-4 header decode we have the height, width, |