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avcodec/mpeg12dec: Don't call ff_mpeg12_common_init()

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It only sets [yc]_dc_scale_table and these tables are only
read in ff_set_qscale(); but the MPEG-1/2 decoders don't call
ff_set_qscale() at all.
(Furthermore, given that intra_dc_precision is always zero
for a decoder at this point, ff_mpeg12_common_init()
actually set these pointers to what ff_mpv_common_defaults()
already set them.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-09-30 02:54:47 +02:00
parent fccb23b7dd
commit b0c1473f6e
1 changed files with 0 additions and 2 deletions
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2
libavcodec/mpeg12dec.c
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@ -1062,7 +1062,6 @@ static av_cold int mpeg_decode_init(AVCodecContext *avctx)
/* we need some permutation to store matrices,
* until the decoder sets the real permutation. */
ff_mpv_idct_init(s2);
ff_mpeg12_common_init(&s->mpeg_enc_ctx);
ff_mpeg12_init_vlcs();
s2->chroma_format = 1;
@ -3075,7 +3074,6 @@ static av_cold int ipu_decode_init(AVCodecContext *avctx)
ff_mpv_decode_init(m, avctx);
ff_mpv_idct_init(m);
ff_mpeg12_common_init(m);
ff_mpeg12_init_vlcs();
for (int i = 0; i < 64; i++) {