static void MBAnalyze(VP8EncIterator* const it, int alphas[MAX_ALPHA + 1], int* const alpha, int* const uv_alpha) { const VP8Encoder* const enc = it->enc_; int best_alpha, best_uv_alpha; VP8SetIntra16Mode(it, 0); // default: Intra16, DC_PRED VP8SetSkip(it, 0); // not skipped VP8SetSegment(it, 0); // default segment, spec-wise. best_alpha = MBAnalyzeBestIntra16Mode(it); if (enc->method_ >= 5) { // We go and make a fast decision for intra4/intra16. // It's usually not a good and definitive pick, but helps seeding the stats // about level bit-cost. // TODO(skal): improve criterion. best_alpha = MBAnalyzeBestIntra4Mode(it, best_alpha); } best_uv_alpha = MBAnalyzeBestUVMode(it); // Final susceptibility mix best_alpha = (3 * best_alpha + best_uv_alpha + 2) >> 2; best_alpha = FinalAlphaValue(best_alpha); alphas[best_alpha]++; it->mb_->alpha_ = best_alpha; // for later remapping. // Accumulate for later complexity analysis. *alpha += best_alpha; // mixed susceptibility (not just luma) *uv_alpha += best_uv_alpha; }
static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { const int max_mode = (it->enc_->method_ >= FAST_ANALYSIS_METHOD) ? MAX_INTRA16_MODE : NUM_PRED_MODES; int mode; int best_alpha = DEFAULT_ALPHA; int best_mode = 0; VP8MakeLuma16Preds(it); for (mode = 0; mode < max_mode; ++mode) { VP8Histogram histo = { { 0 } }; int alpha; VP8CollectHistogram(it->yuv_in_ + Y_OFF, it->yuv_p_ + VP8I16ModeOffsets[mode], 0, 16, &histo); alpha = GetAlpha(&histo); if (IS_BETTER_ALPHA(alpha, best_alpha)) { best_alpha = alpha; best_mode = mode; } } VP8SetIntra16Mode(it, best_mode); return best_alpha; }
static void MBAnalyze(VP8EncIterator* const it, int alphas[256], int* const uv_alpha) { const VP8Encoder* const enc = it->enc_; int best_alpha, best_uv_alpha; VP8SetIntra16Mode(it, 0); // default: Intra16, DC_PRED VP8SetSkip(it, 0); // not skipped VP8SetSegment(it, 0); // default segment, spec-wise. best_alpha = MBAnalyzeBestIntra16Mode(it); if (enc->method_ != 3) { // We go and make a fast decision for intra4/intra16. // It's usually not a good and definitive pick, but helps seeding the stats // about level bit-cost. // TODO(skal): improve criterion. best_alpha = MBAnalyzeBestIntra4Mode(it, best_alpha); } best_uv_alpha = MBAnalyzeBestUVMode(it); // Final susceptibility mix best_alpha = (best_alpha + best_uv_alpha + 1) / 2; alphas[best_alpha]++; *uv_alpha += best_uv_alpha; it->mb_->alpha_ = best_alpha; // Informative only. }
static void MBAnalyze(VP8EncIterator* const it, int alphas[MAX_ALPHA + 1], int* const alpha, int* const uv_alpha) { const VP8Encoder* const enc = it->enc_; int best_alpha, best_uv_alpha; VP8SetIntra16Mode(it, 0); VP8SetSkip(it, 0); VP8SetSegment(it, 0); best_alpha = MBAnalyzeBestIntra16Mode(it); if (enc->method_ >= 5) { best_alpha = MBAnalyzeBestIntra4Mode(it, best_alpha); } best_uv_alpha = MBAnalyzeBestUVMode(it); best_alpha = (3 * best_alpha + best_uv_alpha + 2) >> 2; best_alpha = FinalAlphaValue(best_alpha); alphas[best_alpha]++; it->mb_->alpha_ = best_alpha; *alpha += best_alpha; *uv_alpha += best_uv_alpha; }
static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { const int max_mode = (it->enc_->method_ >= 3) ? MAX_INTRA16_MODE : 4; int mode; int best_alpha = -1; int best_mode = 0; VP8MakeLuma16Preds(it); for (mode = 0; mode < max_mode; ++mode) { const int alpha = VP8CollectHistogram(it->yuv_in_ + Y_OFF, it->yuv_p_ + VP8I16ModeOffsets[mode], 0, 16); if (alpha > best_alpha) { best_alpha = alpha; best_mode = mode; } } VP8SetIntra16Mode(it, best_mode); return best_alpha; }
static int MBAnalyzeBestIntra16Mode(VP8EncIterator* const it) { const int max_mode = MAX_INTRA16_MODE; int mode; int best_alpha = DEFAULT_ALPHA; int best_mode = 0; VP8MakeLuma16Preds(it); for (mode = 0; mode < max_mode; ++mode) { VP8Histogram histo; int alpha; InitHistogram(&histo); VP8CollectHistogram(it->yuv_in_ + Y_OFF, it->yuv_p_ + VP8I16ModeOffsets[mode], 0, 16, &histo); alpha = GetAlpha(&histo); if (IS_BETTER_ALPHA(alpha, best_alpha)) { best_alpha = alpha; best_mode = mode; } } VP8SetIntra16Mode(it, best_mode); return best_alpha; }