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Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_channel_filtering.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_channel_filtering.cpp | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_channel_filtering.cpp b/media/libstagefright/codecs/aacdec/ps_channel_filtering.cpp new file mode 100644 index 0000000..03a53df --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_channel_filtering.cpp @@ -0,0 +1,281 @@ +/* ------------------------------------------------------------------ + * 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<<R_SHIFT) + (x>=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 + |