/***************************************************************************** * Copyright (C) 2013 x265 project * * Authors: Steve Borho * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. * * This program is also available under a commercial proprietary license. * For more information, contact us at license @ x265.com. *****************************************************************************/ #ifndef X265_RDCOST_H #define X265_RDCOST_H #include "common.h" #include "slice.h" namespace X265_NS { // private namespace class RDCost { public: /* all weights and factors stored as FIX8 */ uint64_t m_lambda2; uint64_t m_lambda; uint32_t m_chromaDistWeight[2]; uint32_t m_psyRdBase; uint32_t m_psyRd; int m_qp; /* QP used to configure lambda, may be higher than QP_MAX_SPEC but <= QP_MAX_MAX */ void setPsyRdScale(double scale) { m_psyRdBase = (uint32_t)floor(65536.0 * scale * 0.33); } void setQP(const Slice& slice, int qp) { x265_emms(); /* TODO: if the lambda tables were ints, this would not be necessary */ m_qp = qp; setLambda(x265_lambda2_tab[qp], x265_lambda_tab[qp]); /* Scale PSY RD factor by a slice type factor */ static const uint32_t psyScaleFix8[3] = { 300, 256, 96 }; /* B, P, I */ m_psyRd = (m_psyRdBase * psyScaleFix8[slice.m_sliceType]) >> 8; /* Scale PSY RD factor by QP, at high QP psy-rd can cause artifacts */ if (qp >= 40) { int scale = qp >= QP_MAX_SPEC ? 0 : (QP_MAX_SPEC - qp) * 23; m_psyRd = (m_psyRd * scale) >> 8; } int qpCb, qpCr; if (slice.m_sps->chromaFormatIdc == X265_CSP_I420) { qpCb = (int)g_chromaScale[x265_clip3(QP_MIN, QP_MAX_MAX, qp + slice.m_pps->chromaQpOffset[0])]; qpCr = (int)g_chromaScale[x265_clip3(QP_MIN, QP_MAX_MAX, qp + slice.m_pps->chromaQpOffset[1])]; } else { qpCb = x265_clip3(QP_MIN, QP_MAX_SPEC, qp + slice.m_pps->chromaQpOffset[0]); qpCr = x265_clip3(QP_MIN, QP_MAX_SPEC, qp + slice.m_pps->chromaQpOffset[1]); } int chroma_offset_idx = X265_MIN(qp - qpCb + 12, MAX_CHROMA_LAMBDA_OFFSET); uint16_t lambdaOffset = m_psyRd ? x265_chroma_lambda2_offset_tab[chroma_offset_idx] : 256; m_chromaDistWeight[0] = lambdaOffset; chroma_offset_idx = X265_MIN(qp - qpCr + 12, MAX_CHROMA_LAMBDA_OFFSET); lambdaOffset = m_psyRd ? x265_chroma_lambda2_offset_tab[chroma_offset_idx] : 256; m_chromaDistWeight[1] = lambdaOffset; } void setLambda(double lambda2, double lambda) { m_lambda2 = (uint64_t)floor(256.0 * lambda2); m_lambda = (uint64_t)floor(256.0 * lambda); } inline uint64_t calcRdCost(sse_ret_t distortion, uint32_t bits) const { X265_CHECK(bits <= (UINT64_MAX - 128) / m_lambda2, #if X265_DEPTH <= 10 "calcRdCost wrap detected dist: %u, bits %u, lambda: " X265_LL "\n", #else "calcRdCost wrap detected dist: " X265_LL ", bits %u, lambda: " X265_LL "\n", #endif distortion, bits, m_lambda2); return distortion + ((bits * m_lambda2 + 128) >> 8); } /* return the difference in energy between the source block and the recon block */ inline int psyCost(int size, const pixel* source, intptr_t sstride, const pixel* recon, intptr_t rstride) const { return primitives.cu[size].psy_cost_pp(source, sstride, recon, rstride); } /* return the difference in energy between the source block and the recon block */ inline int psyCost(int size, const int16_t* source, intptr_t sstride, const int16_t* recon, intptr_t rstride) const { return primitives.cu[size].psy_cost_ss(source, sstride, recon, rstride); } /* return the RD cost of this prediction, including the effect of psy-rd */ inline uint64_t calcPsyRdCost(sse_ret_t distortion, uint32_t bits, uint32_t psycost) const { return distortion + ((m_lambda * m_psyRd * psycost) >> 24) + ((bits * m_lambda2) >> 8); } inline uint64_t calcRdSADCost(uint32_t sadCost, uint32_t bits) const { X265_CHECK(bits <= (UINT64_MAX - 128) / m_lambda, "calcRdSADCost wrap detected dist: %u, bits %u, lambda: " X265_LL "\n", sadCost, bits, m_lambda); return sadCost + ((bits * m_lambda + 128) >> 8); } inline sse_ret_t scaleChromaDist(uint32_t plane, sse_ret_t dist) const { X265_CHECK(dist <= (UINT64_MAX - 128) / m_chromaDistWeight[plane - 1], #if X265_DEPTH <= 10 "scaleChromaDist wrap detected dist: %u, lambda: %u\n", #else "scaleChromaDist wrap detected dist: " X265_LL " lambda: %u\n", #endif dist, m_chromaDistWeight[plane - 1]); return (sse_ret_t)((dist * (uint64_t)m_chromaDistWeight[plane - 1] + 128) >> 8); } inline uint32_t getCost(uint32_t bits) const { return (uint32_t)((bits * m_lambda + 128) >> 8); } }; } #endif // ifndef X265_TCOMRDCOST_H