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Use qstride = 0 and allocate only a single line for qscale_table since 

for this codecs all quants are the same for a single frame.

Originally committed as revision 21404 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2010-01-23 18:01:38 +00:00
parent e4833b5d71
commit b9e3f85dbc
1 changed files with 3 additions and 3 deletions
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6
libavcodec/mdec.c
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@ -201,7 +201,7 @@ static int decode_frame(AVCodecContext *avctx,
}
p->quality= a->qscale * FF_QP2LAMBDA;
memset(p->qscale_table, a->qscale, p->qstride*a->mb_height);
memset(p->qscale_table, a->qscale, a->mb_width);
*picture = a->picture;
*data_size = sizeof(AVPicture);
@ -229,8 +229,8 @@ static av_cold int decode_init(AVCodecContext *avctx){
ff_mpeg12_init_vlcs();
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_zigzag_direct);
p->qstride= a->mb_width;
p->qscale_table= av_mallocz( p->qstride * a->mb_height);
p->qstride= 0;
p->qscale_table= av_mallocz(a->mb_width);
avctx->pix_fmt= PIX_FMT_YUV420P;
return 0;