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ffv1: set the range coder state in decode_slice_header

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This commit is contained in:
Luca Barbato 2012-10-25 15:42:08 +02:00
parent dcdfb8ede3
commit 22f7942fe7
1 changed files with 6 additions and 1 deletions
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7
libavcodec/ffv1dec.c
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@ -273,7 +273,12 @@ static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
unsigned ps, i, context_count;
memset(state, 128, sizeof(state));
av_assert0(f->version > 2);
if (fs->ac > 1) {
for (i = 1; i < 256; i++) {
fs->c.one_state[i] = f->state_transition[i];
fs->c.zero_state[256 - i] = 256 - fs->c.one_state[i];
}
}
fs->slice_x = get_symbol(c, state, 0) * f->width;
fs->slice_y = get_symbol(c, state, 0) * f->height;