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[FFmpeg-devel,2/5] avcodec/mpeg12dec: Don't call ff_mpeg12_common_init()

Message ID GV1P250MB0737A993474234A1F31C0D4E8F569@GV1P250MB0737.EURP250.PROD.OUTLOOK.COM
State Accepted
Commit b0c1473f6ea992e1c533f9a005c654228d9a0bda
Headers show
Series [FFmpeg-devel,1/5] avcodec/mpeg12vlc: Move MPEG-1/2 RL VLCs to it | expand

Commit Message

Andreas Rheinhardt Sept. 30, 2022, 2:18 a.m. UTC
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>
 libavcodec/mpeg12dec.c | 2 --
 1 file changed, 2 deletions(-)
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diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 7133696f3c..dad1970f6c 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -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_mpeg12_common_init(&s->mpeg_enc_ctx);
     s2->chroma_format              = 1;
@@ -3075,7 +3074,6 @@  static av_cold int ipu_decode_init(AVCodecContext *avctx)
     ff_mpv_decode_init(m, avctx);
-    ff_mpeg12_common_init(m);
     for (int i = 0; i < 64; i++) {