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Correct chroma vector calculation for RealVideo 3.

Browse Source 
Old version divided it wrong, which resulted in chroma drift (visible on FATE
sample too as dirty trails left by clouds).

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
pull/2/head
Kostya Shishkov 14 years ago committed by Ronald S. Bultje
parent 73e8e8dbf9
commit 6f7fe4723b
2 changed files with 30 additions and 30 deletions
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  1. 4
      libavcodec/rv34.c
  2. 56
      tests/ref/fate/rv30

4
libavcodec/rv34.c
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@ -737,8 +737,8 @@ static inline void rv34_mc(RV34DecContext *r, const int block_type,
my = (s->current_picture_ptr->f.motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
lx = (s->current_picture_ptr->f.motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
ly = (s->current_picture_ptr->f.motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
chroma_mx = (s->current_picture_ptr->f.motion_val[dir][mv_pos][0] + 1) >> 1;
chroma_my = (s->current_picture_ptr->f.motion_val[dir][mv_pos][1] + 1) >> 1;
chroma_mx = s->current_picture_ptr->f.motion_val[dir][mv_pos][0] / 2;
chroma_my = s->current_picture_ptr->f.motion_val[dir][mv_pos][1] / 2;
umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24);
umy = (chroma_my + (3 << 24)) / 3 - (1 << 24);
uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3];

56
tests/ref/fate/rv30
Unescape View File

@ -16,31 +16,31 @@
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0, 120000, 126720, 0xbc3cc34f
0, 127500, 126720, 0xcf8cb0e2
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0, 142500, 126720, 0x4338e469
0, 150000, 126720, 0x9d82ea38
0, 157500, 126720, 0x55e0b559
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0, 172500, 126720, 0x4b10b746
0, 180000, 126720, 0x8b07a1db
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0, 195000, 126720, 0x63eb0b9f
0, 202500, 126720, 0x31c80c83
0, 210000, 126720, 0x78495352
0, 217500, 126720, 0x63d609c4
0, 225000, 126720, 0xcd2a62d8
0, 232500, 126720, 0x4aea732d
0, 240000, 126720, 0xe3bb352c
0, 247500, 126720, 0x4b9036ad
0, 255000, 126720, 0x88b66e2d
0, 262500, 126720, 0x4a8a1b16
0, 270000, 126720, 0x2e014eac
0, 277500, 126720, 0x83212c67
0, 285000, 126720, 0x4937e897
0, 292500, 126720, 0x2d38babe
0, 300000, 126720, 0xbcb43c09
0, 307500, 126720, 0x955ffaf4
0, 315000, 126720, 0x3337d4a2
0, 322500, 126720, 0xe8f58c33
0, 330000, 126720, 0x3a7f771f
0, 337500, 126720, 0xb67c39b9
0, 135000, 126720, 0x75ae61b6
0, 142500, 126720, 0x554fe3e4
0, 150000, 126720, 0x72ecea95
0, 157500, 126720, 0x5d00b5fe
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0, 180000, 126720, 0x72f2a47d
0, 187500, 126720, 0x4f639ebe
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0, 210000, 126720, 0x0c735615
0, 217500, 126720, 0x0eaf0c1b
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0, 232500, 126720, 0x14cf7974
0, 240000, 126720, 0xbc513f2a
0, 247500, 126720, 0xbc303fae
0, 255000, 126720, 0xd9f67585
0, 262500, 126720, 0x3378251f
0, 270000, 126720, 0xb3ed5911
0, 277500, 126720, 0xc15a3577
0, 285000, 126720, 0x0a24f256
0, 292500, 126720, 0xfab9c45d
0, 300000, 126720, 0x45464610
0, 307500, 126720, 0xfe2e057d
0, 315000, 126720, 0x23efdc35
0, 322500, 126720, 0x4d888b2e
0, 330000, 126720, 0xdd0d74df
0, 337500, 126720, 0x08382b8e

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