| /* ------------------------------------------------------------------ |
| * 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: calc_sbr_anafilterbank.c |
| |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Who: Date: MM/DD/YYYY |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| |
| ------------------------------------------------------------------------------ |
| 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 2002. |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #ifdef AAC_PLUS |
| |
| |
| #include "calc_sbr_anafilterbank.h" |
| #include "qmf_filterbank_coeff.h" |
| #include "analysis_sub_band.h" |
| |
| #include "aac_mem_funcs.h" |
| #include "fxp_mul32.h" |
| |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. Include conditional |
| ; compile variables also. |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; 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 calc_sbr_anafilterbank_LC(Int32 * Sr, |
| Int16 * X, |
| Int32 scratch_mem[][64], |
| Int32 maxBand) |
| { |
| |
| Int i; |
| Int32 *p_Y_1; |
| Int32 *p_Y_2; |
| |
| Int16 * pt_X_1; |
| Int16 * pt_X_2; |
| Int32 realAccu1; |
| Int32 realAccu2; |
| |
| Int32 tmp1; |
| Int32 tmp2; |
| |
| |
| const Int32 * pt_C; |
| |
| p_Y_1 = scratch_mem[0]; |
| |
| |
| p_Y_2 = p_Y_1 + 63; |
| pt_C = &sbrDecoderFilterbankCoefficients_an_filt_LC[0]; |
| |
| pt_X_1 = X; |
| |
| |
| realAccu1 = fxp_mul32_by_16(Qfmt27(-0.51075594183097F), pt_X_1[-192]); |
| |
| realAccu1 = fxp_mac32_by_16(Qfmt27(-0.51075594183097F), -pt_X_1[-128], realAccu1); |
| realAccu1 = fxp_mac32_by_16(Qfmt27(-0.01876919066980F), pt_X_1[-256], realAccu1); |
| *(p_Y_1++) = fxp_mac32_by_16(Qfmt27(-0.01876919066980F), -pt_X_1[ -64], realAccu1); |
| |
| |
| /* create array Y */ |
| |
| pt_X_1 = &X[-1]; |
| pt_X_2 = &X[-319]; |
| |
| |
| for (i = 15; i != 0; i--) |
| { |
| tmp1 = *(pt_X_1--); |
| tmp2 = *(pt_X_2++); |
| |
| realAccu1 = fxp_mul32_by_16(*(pt_C), tmp1); |
| realAccu2 = fxp_mul32_by_16(*(pt_C++), tmp2); |
| tmp1 = pt_X_1[ -63]; |
| tmp2 = pt_X_2[ +63]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -127]; |
| tmp2 = pt_X_2[ +127]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -191]; |
| tmp2 = pt_X_2[ +191]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -255]; |
| tmp2 = pt_X_2[ +255]; |
| *(p_Y_1++) = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| *(p_Y_2--) = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| |
| tmp1 = *(pt_X_1--); |
| tmp2 = *(pt_X_2++); |
| realAccu1 = fxp_mul32_by_16(*(pt_C), tmp1); |
| realAccu2 = fxp_mul32_by_16(*(pt_C++), tmp2); |
| |
| tmp1 = pt_X_1[ -63]; |
| tmp2 = pt_X_2[ +63]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -127]; |
| tmp2 = pt_X_2[ +127]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -191]; |
| tmp2 = pt_X_2[ +191]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -255]; |
| tmp2 = pt_X_2[ +255]; |
| *(p_Y_1++) = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| *(p_Y_2--) = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| |
| } |
| |
| |
| tmp1 = *(pt_X_1--); |
| tmp2 = *(pt_X_2++); |
| realAccu1 = fxp_mul32_by_16(*(pt_C), tmp1); |
| realAccu2 = fxp_mul32_by_16(*(pt_C++), tmp2); |
| |
| tmp1 = pt_X_1[ -63]; |
| tmp2 = pt_X_2[ +63]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -127]; |
| tmp2 = pt_X_2[ +127]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -191]; |
| tmp2 = pt_X_2[ +191]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -255]; |
| tmp2 = pt_X_2[ +255]; |
| *(p_Y_1++) = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| *(p_Y_2--) = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| |
| |
| pt_X_1 = X; |
| |
| realAccu2 = fxp_mul32_by_16(Qfmt27(0.00370548843500F), X[ -32]); |
| |
| realAccu2 = fxp_mac32_by_16(Qfmt27(0.00370548843500F), pt_X_1[-288], realAccu2); |
| realAccu2 = fxp_mac32_by_16(Qfmt27(0.09949460091720F), pt_X_1[ -96], realAccu2); |
| realAccu2 = fxp_mac32_by_16(Qfmt27(0.09949460091720F), pt_X_1[-224], realAccu2); |
| *(p_Y_1++) = fxp_mac32_by_16(Qfmt27(1.20736865027288F), pt_X_1[-160], realAccu2); |
| |
| |
| analysis_sub_band_LC(scratch_mem[0], |
| Sr, |
| maxBand, |
| (Int32(*)[64])scratch_mem[1]); |
| |
| } |
| |
| |
| |
| #ifdef HQ_SBR |
| |
| void calc_sbr_anafilterbank(Int32 * Sr, |
| Int32 * Si, |
| Int16 * X, |
| Int32 scratch_mem[][64], |
| Int32 maxBand) |
| { |
| Int i; |
| Int32 *p_Y_1; |
| Int32 *p_Y_2; |
| |
| |
| |
| |
| const Int32 * pt_C; |
| Int16 * pt_X_1; |
| Int16 * pt_X_2; |
| Int32 realAccu1; |
| Int32 realAccu2; |
| |
| Int32 tmp1; |
| Int32 tmp2; |
| |
| |
| p_Y_1 = scratch_mem[0]; |
| |
| |
| p_Y_2 = p_Y_1 + 63; |
| pt_C = &sbrDecoderFilterbankCoefficients_an_filt[0]; |
| |
| realAccu1 = fxp_mul32_by_16(Qfmt27(-0.36115899F), X[-192]); |
| |
| |
| realAccu1 = fxp_mac32_by_16(Qfmt27(-0.36115899F), -X[-128], realAccu1); |
| realAccu1 = fxp_mac32_by_16(Qfmt27(-0.013271822F), X[-256], realAccu1); |
| *(p_Y_1++) = fxp_mac32_by_16(Qfmt27(-0.013271822F), -X[ -64], realAccu1); |
| |
| /* create array Y */ |
| |
| pt_X_1 = &X[-1]; |
| pt_X_2 = &X[-319]; |
| |
| |
| for (i = 31; i != 0; i--) |
| { |
| tmp1 = *(pt_X_1--); |
| tmp2 = *(pt_X_2++); |
| realAccu1 = fxp_mul32_by_16(*(pt_C), tmp1); |
| realAccu2 = fxp_mul32_by_16(*(pt_C++), tmp2); |
| tmp1 = pt_X_1[ -63]; |
| tmp2 = pt_X_2[ 63]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -127]; |
| tmp2 = pt_X_2[ 127]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -191]; |
| tmp2 = pt_X_2[ 191]; |
| realAccu1 = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| realAccu2 = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| tmp1 = pt_X_1[ -255]; |
| tmp2 = pt_X_2[ 255]; |
| *(p_Y_1++) = fxp_mac32_by_16(*(pt_C), tmp1, realAccu1); |
| *(p_Y_2--) = fxp_mac32_by_16(*(pt_C++), tmp2, realAccu2); |
| } |
| |
| |
| realAccu2 = fxp_mul32_by_16(Qfmt27(0.002620176F), X[ -32]); |
| realAccu2 = fxp_mac32_by_16(Qfmt27(0.002620176F), X[-288], realAccu2); |
| realAccu2 = fxp_mac32_by_16(Qfmt27(0.070353307F), X[ -96], realAccu2); |
| realAccu2 = fxp_mac32_by_16(Qfmt27(0.070353307F), X[-224], realAccu2); |
| |
| |
| *(p_Y_1++) = fxp_mac32_by_16(Qfmt27(0.85373856F), (X[-160]), realAccu2); |
| |
| |
| analysis_sub_band(scratch_mem[0], |
| Sr, |
| Si, |
| maxBand, |
| (Int32(*)[64])scratch_mem[1]); |
| |
| } |
| |
| |
| #endif |
| |
| |
| |
| #endif /* AAC_PLUS */ |
| |