openharmony/third_party_ffmpeg
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Replace code for clipping MV vectors (which is wrong to use here) with clipping source coords.

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Originally committed as revision 5811 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-07-22 03:57:53 +00:00
parent 4b94465927
commit 230e9d4ca7
1 changed files with 8 additions and 13 deletions
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21
libavcodec/vc1.c
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@ -894,11 +894,6 @@ static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);
}
/* clip motion vector as specified in 8.3.6.5 */
#define CLIP_RANGE(mv, src, lim, bs) \
if(mv < -bs) mv = -bs - src * bs; \
if(mv > lim) mv = lim - src * bs;
/** Do motion compensation over 1 macroblock
* Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
*/
@ -924,10 +919,10 @@ static void vc1_mc_1mv(VC1Context *v)
uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
CLIP_RANGE( src_x, s->mb_x, s->mb_width * 16, 16);
CLIP_RANGE( src_y, s->mb_y, s->mb_height * 16, 16);
CLIP_RANGE(uvsrc_x, s->mb_x, s->mb_width * 8, 8);
CLIP_RANGE(uvsrc_y, s->mb_y, s->mb_height * 8, 8);
src_x = clip( src_x, -16, s->mb_width * 16);
src_y = clip( src_y, -16, s->mb_height * 16);
uvsrc_x = clip(uvsrc_x, -8, s->mb_width * 8);
uvsrc_y = clip(uvsrc_y, -8, s->mb_height * 8);
srcY += src_y * s->linesize + src_x;
srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
@ -1022,8 +1017,8 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n)
src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);
CLIP_RANGE(src_x, s->mb_x, s->mb_width * 16, 16);
CLIP_RANGE(src_y, s->mb_y, s->mb_height * 16, 16);
src_x = clip( src_x, -16, s->mb_width * 16);
src_y = clip( src_y, -16, s->mb_height * 16);
srcY += src_y * s->linesize + src_x;
@ -1124,8 +1119,8 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
CLIP_RANGE(uvsrc_x, s->mb_x, s->mb_width * 8, 8);
CLIP_RANGE(uvsrc_y, s->mb_y, s->mb_height * 8, 8);
uvsrc_x = clip(uvsrc_x, -8, s->mb_width * 8);
uvsrc_y = clip(uvsrc_y, -8, s->mb_height * 8);
srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
if((unsigned)uvsrc_x > (s->h_edge_pos >> 1) - ((uvmx >> 1)&1) - 8