/* ------------------------------------------------------------------ * Copyright (C) 1998-2009 PacketVideo * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. * See the License for the specific language governing permissions * and limitations under the License. * ------------------------------------------------------------------- */ /* Filename: ps_hybrid_analysis.c ------------------------------------------------------------------------------ REVISION HISTORY Who: Date: MM/DD/YYYY Description: ------------------------------------------------------------------------------ INPUT AND OUTPUT DEFINITIONS ------------------------------------------------------------------------------ FUNCTION DESCRIPTION Does Hybrid analysis ------------------------------------------------------------------------------ REQUIREMENTS ------------------------------------------------------------------------------ REFERENCES SC 29 Software Copyright Licencing Disclaimer: This software module was originally developed by Coding Technologies and edited by - in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards for reference purposes and its performance may not have been optimized. This software module is an implementation of one or more tools as specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards. ISO/IEC gives users free license to this software module or modifications thereof for use in products claiming conformance to audiovisual and image-coding related ITU Recommendations and/or ISO/IEC International Standards. ISO/IEC gives users the same free license to this software module or modifications thereof for research purposes and further ISO/IEC standardisation. Those intending to use this software module in products are advised that its use may infringe existing patents. ISO/IEC have no liability for use of this software module or modifications thereof. Copyright is not released for products that do not conform to audiovisual and image-coding related ITU Recommendations and/or ISO/IEC International Standards. The original developer retains full right to modify and use the code for its own purpose, assign or donate the code to a third party and to inhibit third parties from using the code for products that do not conform to audiovisual and image-coding related ITU Recommendations and/or ISO/IEC International Standards. This copyright notice must be included in all copies or derivative works. Copyright (c) ISO/IEC 2003. ------------------------------------------------------------------------------ PSEUDO-CODE ------------------------------------------------------------------------------ */ /*---------------------------------------------------------------------------- ; INCLUDES ----------------------------------------------------------------------------*/ #ifdef AAC_PLUS #ifdef PARAMETRICSTEREO #include "s_hybrid.h" #include "aac_mem_funcs.h" #include "ps_fft_rx8.h" #include "ps_channel_filtering.h" #include "pv_audio_type_defs.h" #include "fxp_mul32.h" /*---------------------------------------------------------------------------- ; MACROS ; Define module specific macros here ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; DEFINES ; Include all pre-processor statements here. Include conditional ; compile variables also. ----------------------------------------------------------------------------*/ #define R_SHIFT 29 #define Q29_fmt(x) (Int32)(x*((Int32)1<=0?0.5F:-0.5F)) #define Qfmt31(a) (Int32)(-a*((Int32)1<<31) + (a>=0?0.5F:-0.5F)) /*---------------------------------------------------------------------------- ; LOCAL FUNCTION DEFINITIONS ; Function Prototype declaration ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; LOCAL STORE/BUFFER/POINTER DEFINITIONS ; Variable declaration - defined here and used outside this module ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; EXTERNAL FUNCTION REFERENCES ; Declare functions defined elsewhere and referenced in this module ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES ; Declare variables used in this module but defined elsewhere ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; FUNCTION CODE ----------------------------------------------------------------------------*/ void two_ch_filtering(const Int32 *pQmf_r, const Int32 *pQmf_i, Int32 *mHybrid_r, Int32 *mHybrid_i) { Int32 cum0; Int32 cum1; Int32 cum2; Int32 tmp1; Int32 tmp2; tmp1 = pQmf_r[ 1] + pQmf_r[11]; tmp2 = pQmf_i[ 1] + pQmf_i[11]; cum1 = fxp_mul32_Q31(Qfmt31(0.03798975052098f), tmp1); cum2 = fxp_mul32_Q31(Qfmt31(0.03798975052098f), tmp2); tmp1 = pQmf_r[ 3] + pQmf_r[ 9]; tmp2 = pQmf_i[ 3] + pQmf_i[ 9]; cum1 = fxp_msu32_Q31(cum1, Qfmt31(0.14586278335076f), tmp1); cum2 = fxp_msu32_Q31(cum2, Qfmt31(0.14586278335076f), tmp2); tmp1 = pQmf_r[ 5] + pQmf_r[ 7]; tmp2 = pQmf_i[ 5] + pQmf_i[ 7]; cum1 = fxp_mac32_Q31(cum1, Qfmt31(0.61193261090336f), tmp1); cum2 = fxp_mac32_Q31(cum2, Qfmt31(0.61193261090336f), tmp2); cum0 = pQmf_r[HYBRID_FILTER_DELAY] >> 1; /* HYBRID_FILTER_DELAY == 6 */ mHybrid_r[0] = (cum0 + cum1); mHybrid_r[1] = (cum0 - cum1); cum0 = pQmf_i[HYBRID_FILTER_DELAY] >> 1; /* HYBRID_FILTER_DELAY == 6 */ mHybrid_i[0] = (cum0 + cum2); mHybrid_i[1] = (cum0 - cum2); } /*---------------------------------------------------------------------------- ; FUNCTION CODE ----------------------------------------------------------------------------*/ void eight_ch_filtering(const Int32 *pQmfReal, const Int32 *pQmfImag, Int32 *mHybridReal, Int32 *mHybridImag, Int32 scratch_mem[]) { Int32 real; Int32 imag; Int32 tmp1; Int32 tmp2; real = fxp_mul32_Q29(Q29_fmt(-0.06989827306334f), pQmfReal[ 4]); real = fxp_mac32_Q31(real, Qfmt31(0.01055120626280f), pQmfReal[12]); imag = fxp_mul32_Q29(Q29_fmt(-0.06989827306334f), pQmfImag[ 4]); imag = fxp_mac32_Q31(imag, Qfmt31(0.01055120626280f), pQmfImag[12]); mHybridReal[2] = (imag - real); mHybridImag[2] = -(imag + real); real = fxp_mul32_Q29(Q29_fmt(-0.07266113929591f), pQmfReal[ 3]); real = fxp_mac32_Q31(real, Qfmt31(0.04540841899650f), pQmfReal[11]); imag = fxp_mul32_Q29(Q29_fmt(-0.07266113929591f), pQmfImag[ 3]); imag = fxp_mac32_Q31(imag, Qfmt31(0.04540841899650f), pQmfImag[11]); tmp1 = fxp_mul32_Q29(Q29_fmt(-0.38268343236509f), real); mHybridReal[3] = fxp_mac32_Q29(Q29_fmt(0.92387953251129f), imag, tmp1); tmp2 = fxp_mul32_Q29(Q29_fmt(-0.92387953251129f), real); mHybridImag[3] = fxp_mac32_Q29(Q29_fmt(-0.38268343236509f), imag, tmp2); mHybridImag[4] = fxp_mul32_Q31(Qfmt31(0.09093731860946f), (pQmfReal[ 2] - pQmfReal[10])); mHybridReal[4] = fxp_mul32_Q31(Qfmt31(0.09093731860946f), (pQmfImag[10] - pQmfImag[ 2])); real = fxp_mul32_Q29(Q29_fmt(-0.02270420949825f), pQmfReal[ 1]); real = fxp_mac32_Q31(real, Qfmt31(0.14532227859182f), pQmfReal[ 9]); imag = fxp_mul32_Q29(Q29_fmt(-0.02270420949825f), pQmfImag[ 1]); imag = fxp_mac32_Q31(imag, Qfmt31(0.14532227859182f), pQmfImag[ 9]); tmp1 = fxp_mul32_Q29(Q29_fmt(0.92387953251129f), imag); mHybridReal[5] = fxp_mac32_Q31(tmp1, Qfmt31(0.76536686473018f), real); tmp2 = fxp_mul32_Q29(Q29_fmt(-0.92387953251129f), real); mHybridImag[5] = fxp_mac32_Q31(tmp2, Qfmt31(0.76536686473018f), imag); real = fxp_mul32_Q29(Q29_fmt(-0.00527560313140f), pQmfReal[ 0]); real = fxp_mac32_Q31(real, Qfmt31(0.13979654612668f), pQmfReal[ 8]); imag = fxp_mul32_Q29(Q29_fmt(-0.00527560313140f), pQmfImag[ 0]); imag = fxp_mac32_Q31(imag, Qfmt31(0.13979654612668f), pQmfImag[ 8]); mHybridReal[6] = (imag + real); mHybridImag[6] = (imag - real); tmp1 = fxp_mul32_Q31(Qfmt31(0.21791935610828f), pQmfReal[ 7]); mHybridReal[7] = fxp_mac32_Q31(tmp1, Qfmt31(0.09026515280366f), pQmfImag[ 7]); tmp2 = fxp_mul32_Q29(Q29_fmt(-0.04513257640183f), pQmfReal[ 7]); mHybridImag[7] = fxp_mac32_Q31(tmp2, Qfmt31(0.21791935610828f), pQmfImag[ 7]); mHybridReal[0] = pQmfReal[HYBRID_FILTER_DELAY] >> 3; mHybridImag[0] = pQmfImag[HYBRID_FILTER_DELAY] >> 3; tmp1 = fxp_mul32_Q29(Q29_fmt(-0.04513257640183f), pQmfImag[ 5]); mHybridReal[1] = fxp_mac32_Q31(tmp1, Qfmt31(0.21791935610828f), pQmfReal[ 5]); tmp2 = fxp_mul32_Q31(Qfmt31(0.21791935610828f), pQmfImag[ 5]); mHybridImag[1] = fxp_mac32_Q31(tmp2, Qfmt31(0.09026515280366f), pQmfReal[ 5]); /* * 8*ifft */ ps_fft_rx8(mHybridReal, mHybridImag, scratch_mem); } #endif #endif