int VP8EncAnalyze(VP8Encoder* const enc) {
int ok = 1;
const int do_segments =
enc->config_->emulate_jpeg_size || // We need the complexity evaluation.
(enc->segment_hdr_.num_segments_ > 1) ||
(enc->method_ == 0); // for method 0, we need preds_[] to be filled.
enc->alpha_ = 0;
enc->uv_alpha_ = 0;
if (do_segments) {
int alphas[MAX_ALPHA + 1] = { 0 };
VP8EncIterator it;
VP8IteratorInit(enc, &it);
do {
VP8IteratorImport(&it);
MBAnalyze(&it, alphas, &enc->alpha_, &enc->uv_alpha_);
ok = VP8IteratorProgress(&it, 20);
// Let's pretend we have perfect lossless reconstruction.
} while (ok && VP8IteratorNext(&it, it.yuv_in_));
enc->alpha_ /= enc->mb_w_ * enc->mb_h_;
enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_;
if (ok) AssignSegments(enc, alphas);
} else { // Use only one default segment.
ResetAllMBInfo(enc);
}
return ok;
}
int VP8EncAnalyze(VP8Encoder* const enc) {
int ok = 1;
const int do_segments =
enc->config_->emulate_jpeg_size ||
(enc->segment_hdr_.num_segments_ > 1) ||
(enc->method_ == 0);
enc->alpha_ = 0;
enc->uv_alpha_ = 0;
if (do_segments) {
int alphas[MAX_ALPHA + 1] = { 0 };
VP8EncIterator it;
VP8IteratorInit(enc, &it);
do {
VP8IteratorImport(&it);
MBAnalyze(&it, alphas, &enc->alpha_, &enc->uv_alpha_);
ok = VP8IteratorProgress(&it, 20);
} while (ok && VP8IteratorNext(&it, it.yuv_in_));
enc->alpha_ /= enc->mb_w_ * enc->mb_h_;
enc->uv_alpha_ /= enc->mb_w_ * enc->mb_h_;
if (ok) AssignSegments(enc, alphas);
} else {
ResetAllMBInfo(enc);
}
return ok;
}