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theoradec: small 4MV code reorganization to ease future improvements 

no functional changes

Originally committed as revision 15165 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2008-09-03 00:10:30 +00:00
parent 1599503043
commit e32e2d56d4
1 changed files with 6 additions and 7 deletions
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13
libavcodec/vp3.c
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@ -1039,6 +1039,10 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
break;
case MODE_INTER_FOURMV:
/* vector maintenance */
prior_last_motion_x = last_motion_x;
prior_last_motion_y = last_motion_y;
/* fetch 4 vectors from the bitstream, one for each
* Y fragment, then average for the C fragment vectors */
motion_x[4] = motion_y[4] = 0;
@ -1050,6 +1054,8 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
}
last_motion_x = motion_x[k];
last_motion_y = motion_y[k];
motion_x[4] += motion_x[k];
motion_y[4] += motion_y[k];
}
@ -1058,13 +1064,6 @@ static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
motion_x[4]= RSHIFT(motion_x[4], 2);
motion_y[5]=
motion_y[4]= RSHIFT(motion_y[4], 2);
/* vector maintenance; vector[3] is treated as the
* last vector in this case */
prior_last_motion_x = last_motion_x;
prior_last_motion_y = last_motion_y;
last_motion_x = motion_x[3];
last_motion_y = motion_y[3];
break;
case MODE_INTER_LAST_MV: