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DMV support patch by ("Ivan Kalvachev" <ivan at cacad dot com>) 

Originally committed as revision 1985 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ivan Kalvachev 2003-06-23 22:32:15 +00:00 committed by Michael Niedermayer
parent 2a250222e6
commit 1dff7d56ad
2 changed files with 85 additions and 17 deletions
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37
libavcodec/mpeg12.c
View File

@ -1108,34 +1108,37 @@ static int mpeg_decode_mb(MpegEncContext *s,
s->last_mv[i][0][1] >> 1);
dmy = get_dmv(s);
s->mv_type = MV_TYPE_DMV;
/* XXX: totally broken */
s->last_mv[i][0][1] = my<<1;
s->last_mv[i][1][1] = my<<1;
s->mv[i][0][0] = mx;
s->mv[i][0][1] = my;
s->mv[i][1][0] = mx;//not used
s->mv[i][1][1] = my;//not used
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
s->last_mv[i][0][1] = my << 1;
s->last_mv[i][1][1] = my << 1;
//m = 1 + 2 * s->top_field_first;
m = s->top_field_first ? 1 : 3;
/* top -> top pred */
s->mv[i][0][0] = mx;
s->mv[i][0][1] = my << 1;
s->mv[i][1][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][1][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
m = 4 - m;
s->mv[i][2][0] = mx;
s->mv[i][2][1] = my << 1;
s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
} else {
mb_type |= MB_TYPE_16x16;
s->last_mv[i][0][1] = my;
s->last_mv[i][1][1] = my;
s->mv[i][0][0] = mx;
s->mv[i][0][1] = my;
s->mv[i][1][0] = ((mx + (mx > 0)) >> 1) + dmx;
s->mv[i][1][1] = ((my + (my > 0)) >> 1) + dmy - 1
/* + 2 * cur_field */;
s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
if(s->picture_structure == PICT_TOP_FIELD)
s->mv[i][2][1]--;
else
s->mv[i][2][1]++;
}
}
break;

65
libavcodec/mpegvideo.c
View File

@ -2190,6 +2190,71 @@ static inline void MPV_motion(MpegEncContext *s,
s->mv[dir][0][0], s->mv[dir][0][1], 16);
}
break;
case MV_TYPE_DMV:
{
op_pixels_func (*dmv_pix_op)[4];
int offset;
dmv_pix_op = s->dsp.put_pixels_tab;
if(s->picture_structure == PICT_FRAME){
//put top field from top field
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
ref_picture, 0,
1, dmv_pix_op,
s->mv[dir][0][0], s->mv[dir][0][1], 8);
//put bottom field from bottom field
mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize,
ref_picture, s->linesize,
1, dmv_pix_op,
s->mv[dir][0][0], s->mv[dir][0][1], 8);
dmv_pix_op = s->dsp.avg_pixels_tab;
//avg top field from bottom field
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
ref_picture, s->linesize,
1, dmv_pix_op,
s->mv[dir][2][0], s->mv[dir][2][1], 8);
//avg bottom field from top field
mpeg_motion(s, dest_y, dest_cb, dest_cr, s->linesize,
ref_picture, 0,
1, dmv_pix_op,
s->mv[dir][3][0], s->mv[dir][3][1], 8);
}else{
offset=(s->picture_structure == PICT_BOTTOM_FIELD)?
s->linesize : 0;
//put field from the same parity
//same parity is never in the same frame
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
ref_picture,offset,
0,dmv_pix_op,
s->mv[dir][0][0],s->mv[dir][0][1],16);
// after put we make avg of the same block
dmv_pix_op=s->dsp.avg_pixels_tab;
//opposite parity is always in the same frame if this is second field
if(!s->first_field){
ref_picture = s->current_picture.data;
//top field is one linesize from frame beginig
offset=(s->picture_structure == PICT_BOTTOM_FIELD)?
-s->linesize : s->linesize;
}else
offset=(s->picture_structure == PICT_BOTTOM_FIELD)?
0 : s->linesize;
//avg field from the opposite parity
mpeg_motion(s, dest_y, dest_cb, dest_cr,0,
ref_picture, offset,
0,dmv_pix_op,
s->mv[dir][2][0],s->mv[dir][2][1],16);
}
}
break;
}
}