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Code Issues Releases Activity

motion vector limit for mpeg2

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Originally committed as revision 4482 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-07-27 13:16:35 +00:00
parent 966265bc88
commit 2f300f8965
1 changed files with 10 additions and 5 deletions
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15
libavcodec/motion_est.c
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@ -1896,6 +1896,11 @@ int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type)
int best_fcode=-1; int best_fcode=-1;
int best_score=-10000000; int best_score=-10000000;
if(s->msmpeg4_version)
range= FFMIN(range, 16);
else if(s->codec_id == CODEC_ID_MPEG2VIDEO && s->avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL)
range= FFMIN(range, 256);
for(i=0; i<8; i++) score[i]= s->mb_num*(8-i); for(i=0; i<8; i++) score[i]= s->mb_num*(8-i);
for(y=0; y<s->mb_height; y++){ for(y=0; y<s->mb_height; y++){
@ -1950,9 +1955,10 @@ void ff_fix_long_p_mvs(MpegEncContext * s)
int y, range; int y, range;
assert(s->pict_type==P_TYPE); assert(s->pict_type==P_TYPE);
range = (((s->out_format == FMT_MPEG1) ? 8 : 16) << f_code); range = (((s->out_format == FMT_MPEG1 || s->msmpeg4_version) ? 8 : 16) << f_code);
if(s->msmpeg4_version) range= 16; assert(range <= 16 || !s->msmpeg4_version);
assert(range <=256 || !(s->codec_id == CODEC_ID_MPEG2VIDEO && s->avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL));
if(c->avctx->me_range && range > c->avctx->me_range) range= c->avctx->me_range; if(c->avctx->me_range && range > c->avctx->me_range) range= c->avctx->me_range;
@ -2000,9 +2006,8 @@ void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_
int y, h_range, v_range; int y, h_range, v_range;
// RAL: 8 in MPEG-1, 16 in MPEG-4 // RAL: 8 in MPEG-1, 16 in MPEG-4
int range = (((s->out_format == FMT_MPEG1) ? 8 : 16) << f_code); int range = (((s->out_format == FMT_MPEG1 || s->msmpeg4_version) ? 8 : 16) << f_code);
if(s->msmpeg4_version) range= 16;
if(c->avctx->me_range && range > c->avctx->me_range) range= c->avctx->me_range; if(c->avctx->me_range && range > c->avctx->me_range) range= c->avctx->me_range;
h_range= range; h_range= range;