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Here is the patch suggested by: unkaggregate, users sf net

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Main reason is: deltas in interframes need scaling by 3/4 before applying.
Detailed description is at:
http://sourceforge.net/tracker/index.php?func=detail&aid=1222099&group_id=16082&atid=116082
He also mentioned some samples at:
http://www.nerdgrounds.com/indeo21_test/
patch posted to ffmpeg-devel by (Kostya: kostya shishkov, gmail com)

Originally committed as revision 4425 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-07-09 21:39:29 +00:00
parent 002c01a6f3
commit 32fe3ac0f9
1 changed files with 2 additions and 2 deletions
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4
libavcodec/indeo2.c
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@ -118,11 +118,11 @@ static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_
c -= 0x7F;
out += c * 2;
} else { /* add two deltas from table */
t = dst[out] + (table[c * 2] - 128);
t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
t= clip_uint8(t);
dst[out] = t;
out++;
t = dst[out] + (table[(c * 2) + 1] - 128);
t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
t= clip_uint8(t);
dst[out] = t;
out++;