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Code Issues Releases Activity

avcodec/mpeg12dec: Remove write-only assignments

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This decoder unquantizes while parsing blocks
and does not use dct_unquantize_mpeg1_intra
(which uses *_dc_scale) at all.

repeat_field was unused since
e0a3d744a0.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2024-07-08 14:55:45 +02:00
parent 3474475e58
commit db8546dff7
1 changed files with 0 additions and 4 deletions
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4
libavcodec/mpeg12dec.c
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@@ -72,7 +72,6 @@ enum Mpeg2ClosedCaptionsFormat {
typedef struct Mpeg1Context { typedef struct Mpeg1Context {
MpegEncContext mpeg_enc_ctx; MpegEncContext mpeg_enc_ctx;
int repeat_field; /* true if we must repeat the field */
AVPanScan pan_scan; /* some temporary storage for the panscan */ AVPanScan pan_scan; /* some temporary storage for the panscan */
enum AVStereo3DType stereo3d_type; enum AVStereo3DType stereo3d_type;
int has_stereo3d; int has_stereo3d;
@@ -781,7 +780,6 @@ static av_cold int mpeg_decode_init(AVCodecContext *avctx)
ff_mpeg12_init_vlcs(); ff_mpeg12_init_vlcs();
s2->chroma_format = 1; s2->chroma_format = 1;
s->repeat_field = 0;
avctx->color_range = AVCOL_RANGE_MPEG; avctx->color_range = AVCOL_RANGE_MPEG;
return 0; return 0;
} }
@@ -1050,8 +1048,6 @@ static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
av_log(avctx, AV_LOG_DEBUG, av_log(avctx, AV_LOG_DEBUG,
"vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type); "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
s->y_dc_scale = 8;
s->c_dc_scale = 8;
return 0; return 0;
} }