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Support lowres 3 when decoding MPEG video. 

Patch by Anatoliy Nenashev, nenashev_as mail ru

Originally committed as revision 21239 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Anatoly Nenashev 2010-01-16 10:41:52 +00:00 committed by Carl Eugen Hoyos
parent b5eab66e9f
commit e1bb0364f8
1 changed files with 16 additions and 13 deletions
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29
libavcodec/mpegvideo.c
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@ -1416,6 +1416,7 @@ static inline int hpel_motion_lowres(MpegEncContext *s,
int motion_x, int motion_y)
{
const int lowres= s->avctx->lowres;
const int op_index= FFMIN(lowres, 2);
const int s_mask= (2<<lowres)-1;
int emu=0;
int sx, sy;
@ -1440,11 +1441,11 @@ static inline int hpel_motion_lowres(MpegEncContext *s,
emu=1;
}
sx <<= 2 - lowres;
sy <<= 2 - lowres;
sx= (sx << 2) >> lowres;
sy= (sy << 2) >> lowres;
if(field_select)
src += s->linesize;
pix_op[lowres](dest, src, stride, h, sx, sy);
pix_op[op_index](dest, src, stride, h, sx, sy);
return emu;
}
@ -1458,6 +1459,7 @@ static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
uint8_t *ptr_y, *ptr_cb, *ptr_cr;
int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, uvlinesize, linesize, sx, sy, uvsx, uvsy;
const int lowres= s->avctx->lowres;
const int op_index= FFMIN(lowres, 2);
const int block_s= 8>>lowres;
const int s_mask= (2<<lowres)-1;
const int h_edge_pos = s->h_edge_pos >> lowres;
@ -1532,15 +1534,15 @@ static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
ptr_cr+= s->uvlinesize;
}
sx <<= 2 - lowres;
sy <<= 2 - lowres;
sx= (sx << 2) >> lowres;
sy= (sy << 2) >> lowres;
pix_op[lowres-1](dest_y, ptr_y, linesize, h, sx, sy);
if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
uvsx <<= 2 - lowres;
uvsy <<= 2 - lowres;
pix_op[lowres](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
pix_op[lowres](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
uvsx= (uvsx << 2) >> lowres;
uvsy= (uvsy << 2) >> lowres;
pix_op[op_index](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
pix_op[op_index](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift, uvsx, uvsy);
}
//FIXME h261 lowres loop filter
}
@ -1551,6 +1553,7 @@ static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
h264_chroma_mc_func *pix_op,
int mx, int my){
const int lowres= s->avctx->lowres;
const int op_index= FFMIN(lowres, 2);
const int block_s= 8>>lowres;
const int s_mask= (2<<lowres)-1;
const int h_edge_pos = s->h_edge_pos >> (lowres+1);
@ -1583,16 +1586,16 @@ static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
emu=1;
}
}
sx <<= 2 - lowres;
sy <<= 2 - lowres;
pix_op[lowres](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
sx= (sx << 2) >> lowres;
sy= (sy << 2) >> lowres;
pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
ptr = ref_picture[2] + offset;
if(emu){
ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos);
ptr= s->edge_emu_buffer;
}
pix_op[lowres](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
}
/**