){kind=link}
int VP8EncAnalyze(VP8Encoder* const enc) {
int ok = 1;
const int do_segments =
(enc->segment_hdr_.num_segments_ > 1) ||
(enc->method_ <= 2); // for methods 0,1,2, we need preds_[] to be filled.
if (do_segments) {
int alphas[MAX_ALPHA + 1] = { 0 };
VP8EncIterator it;
VP8IteratorInit(enc, &it);
enc->uv_alpha_ = 0;
do {
VP8IteratorImport(&it);
MBAnalyze(&it, alphas, &enc->uv_alpha_);
ok = VP8IteratorProgress(&it, 20);
// Let's pretend we have perfect lossless reconstruction.
} while (ok && VP8IteratorNext(&it, it.yuv_in_));
enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_;
if (ok) AssignSegments(enc, alphas);
} else { // Use only one default segment.
int n;
for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) {
DefaultMBInfo(&enc->mb_info_[n]);
}
// Default susceptibilities.
enc->dqm_[0].alpha_ = 0;
enc->dqm_[0].beta_ = 0;
enc->uv_alpha_ = 0; // we can't compute this one.
WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_);
}
return ok;
}
static void ResetAllMBInfo(VP8Encoder* const enc) {
int n;
for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) {
DefaultMBInfo(&enc->mb_info_[n]);
}
// Default susceptibilities.
enc->dqm_[0].alpha_ = 0;
enc->dqm_[0].beta_ = 0;
// Note: we can't compute this alpha_ / uv_alpha_.
WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_);
}
static void ResetAllMBInfo(VP8Encoder* const enc) {
int n;
for (n = 0; n < enc->mb_w_ * enc->mb_h_; ++n) {
DefaultMBInfo(&enc->mb_info_[n]);
}
enc->dqm_[0].alpha_ = 0;
enc->dqm_[0].beta_ = 0;
WebPReportProgress(enc->pic_, enc->percent_ + 20, &enc->percent_);
}