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remove absolute_delta_ field and syntax code

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we'll always encode using absolute value, not relative ones.
    Both methods use the same number of bits, so we'll go for the
    simpler and most robust one.
    + add some extra checks about pic->u/v being NULL.

Change-Id: I98ea01a1a6b133ab3c816c0fbc50e18269bd2098
This commit is contained in:
Pascal Massimino
2011-02-27 10:22:54 -08:00
parent 0744e8420e
commit b65a3e101e
3 changed files with 7 additions and 20 deletions
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19
src/enc/syntax.c
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@ -86,24 +86,13 @@ static void PutSegmentHeader(VP8BitWriter* const bw,
int s;
VP8PutBitUniform(bw, hdr->update_map_);
if (VP8PutBitUniform(bw, update_data)) {
const int base_quant = enc->base_quant_;
const int base_strength = enc->filter_hdr_.level_;
VP8PutBitUniform(bw, hdr->absolute_delta_);
// we always use absolute values, not relative ones
VP8PutBitUniform(bw, 1); // (segment_feature_mode = 1. Paragraph 9.3.)
for (s = 0; s < NUM_MB_SEGMENTS; ++s) {
if (hdr->absolute_delta_) {
VP8PutSignedValue(bw, enc->dqm_[s].quant_, 7);
} else {
const int delta = enc->dqm_[s].quant_ - base_quant;
VP8PutSignedValue(bw, delta, 7);
}
VP8PutSignedValue(bw, enc->dqm_[s].quant_, 7);
}
for (s = 0; s < NUM_MB_SEGMENTS; ++s) {
if (hdr->absolute_delta_) {
VP8PutSignedValue(bw, enc->dqm_[s].fstrength_, 6);
} else {
const int delta = enc->dqm_[s].fstrength_ - base_strength;
VP8PutSignedValue(bw, delta, 6);
}
VP8PutSignedValue(bw, enc->dqm_[s].fstrength_, 6);
}
}
if (hdr->update_map_) {