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Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_stereo_processing.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_stereo_processing.cpp | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_stereo_processing.cpp b/media/libstagefright/codecs/aacdec/ps_stereo_processing.cpp new file mode 100644 index 0000000..813b55d --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_stereo_processing.cpp @@ -0,0 +1,372 @@ +/* ------------------------------------------------------------------ + * 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_stereo_processing.c + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Who: Date: MM/DD/YYYY + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Stereo Process or reconstruction + + l_k(n) = H11(k,n)*s_k(n) + H21(k,n)*d_k(n) + + r_k(n) = H12(k,n)*s_k(n) + H22(k,n)*d_k(n) + + _______ ________ + | | _______ | | + ->|Hybrid | LF ---- | |->| Hybrid |--> + | Anal. | | | | | Synth | QMF -> L + ------- o----------------------->| | -------- Synth +QMF | s_k(n) |Stereo |--------------> +Anal. -------------------------->| | + _______ | | | | ________ + | | HF --o | ----------- |Process| | | + ->| Delay | | ->| |-------->| |->| Hybrid |--> + ------- | |decorrelate| d_k(n) | | | Synth | QMF -> R + ---->| |-------->| | -------- Synth + ----------- |_______|--------------> + + +------------------------------------------------------------------------------ + 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 "pv_audio_type_defs.h" +#include "ps_stereo_processing.h" +#include "fxp_mul32.h" +#include "ps_all_pass_filter_coeff.h" + +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + +#ifndef min +#define min(a, b) ((a) < (b) ? (a) : (b)) +#endif + +/*---------------------------------------------------------------------------- +; 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 ps_stereo_processing(STRUCT_PS_DEC *pms, + Int32 *qmfLeftReal, + Int32 *qmfLeftImag, + Int32 *qmfRightReal, + Int32 *qmfRightImag) +{ + Int32 group; + Int32 subband; + Int32 maxSubband; + Int32 usb; + Char index; + + + Int32 *hybrLeftReal; + Int32 *hybrLeftImag; + Int32 *hybrRightReal; + Int32 *hybrRightImag; + Int32 *ptr_hybrLeftReal; + Int32 *ptr_hybrLeftImag; + Int32 *ptr_hybrRightReal; + Int32 *ptr_hybrRightImag; + + + Int16 h11; + Int16 h12; + Int16 h21; + Int16 h22; + + Int32 temp1; + Int32 temp2; + Int32 temp3; + + usb = pms->usb; + + /* + * Complete Linear interpolation + */ + + hybrLeftReal = pms->mHybridRealLeft; + hybrLeftImag = pms->mHybridImagLeft; + hybrRightReal = pms->mHybridRealRight; + hybrRightImag = pms->mHybridImagRight; + + for (group = 0; group < SUBQMF_GROUPS; group++) /* SUBQMF_GROUPS == 10 */ + { + + temp1 = pms->deltaH11[group]; + temp2 = pms->deltaH12[group]; + + pms->H11[group] += temp1; + h11 = (Int16)(pms->H11[group] >> 16); + pms->H12[group] += temp2; + h12 = (Int16)(pms->H12[group] >> 16); + + temp1 = pms->deltaH21[group]; + temp2 = pms->deltaH22[group]; + + pms->H21[group] += temp1; + h21 = (Int16)(pms->H21[group] >> 16); + pms->H22[group] += temp2; + h22 = (Int16)(pms->H22[group] >> 16); + + index = groupBorders[group]; + + /* + * Reconstruction of Stereo sub-band signal + * + * l_k(n) = H11(k,n)*s_k(n) + H21(k,n)*d_k(n) + * + * r_k(n) = H12(k,n)*s_k(n) + H22(k,n)*d_k(n) + */ + ptr_hybrLeftReal = &hybrLeftReal[ index]; + ptr_hybrRightReal = &hybrRightReal[ index]; + + temp1 = *(ptr_hybrLeftReal) << 1; + temp2 = *(ptr_hybrRightReal) << 1; + + temp3 = fxp_mul32_by_16(temp1, h11); + *(ptr_hybrLeftReal) = fxp_mac32_by_16(temp2, h21, temp3) << 1; + + temp3 = fxp_mul32_by_16(temp1, h12); + *(ptr_hybrRightReal) = fxp_mac32_by_16(temp2, h22, temp3) << 1; + + + ptr_hybrLeftImag = &hybrLeftImag[ index]; + ptr_hybrRightImag = &hybrRightImag[ index]; + + temp1 = *(ptr_hybrLeftImag) << 1; + temp2 = *(ptr_hybrRightImag) << 1; + + temp3 = fxp_mul32_by_16(temp1, h11); + *(ptr_hybrLeftImag) = fxp_mac32_by_16(temp2, h21, temp3) << 1; + + temp3 = fxp_mul32_by_16(temp1, h12); + *(ptr_hybrRightImag) = fxp_mac32_by_16(temp2, h22, temp3) << 1; + + + } /* groups loop */ + + temp1 = pms->deltaH11[SUBQMF_GROUPS]; + temp2 = pms->deltaH12[SUBQMF_GROUPS]; + + pms->H11[SUBQMF_GROUPS] += temp1; + h11 = (Int16)(pms->H11[SUBQMF_GROUPS] >> 16); + pms->H12[SUBQMF_GROUPS] += temp2; + h12 = (Int16)(pms->H12[SUBQMF_GROUPS] >> 16); + + temp1 = pms->deltaH21[SUBQMF_GROUPS]; + temp2 = pms->deltaH22[SUBQMF_GROUPS]; + + pms->H21[SUBQMF_GROUPS] += temp1; + h21 = (Int16)(pms->H21[SUBQMF_GROUPS] >> 16); + pms->H22[SUBQMF_GROUPS] += temp2; + h22 = (Int16)(pms->H22[SUBQMF_GROUPS] >> 16); + + + ptr_hybrLeftReal = &qmfLeftReal[ 3]; + ptr_hybrRightReal = &qmfRightReal[ 3]; + + /* + * Reconstruction of Stereo sub-band signal + * + * l_k(n) = H11(k,n)*s_k(n) + H21(k,n)*d_k(n) + * + * r_k(n) = H12(k,n)*s_k(n) + H22(k,n)*d_k(n) + */ + temp1 = *(ptr_hybrLeftReal) << 1; + temp2 = *(ptr_hybrRightReal) << 1; + + + temp3 = fxp_mul32_by_16(temp1, h11); + *(ptr_hybrLeftReal) = fxp_mac32_by_16(temp2, h21, temp3) << 1; + + temp3 = fxp_mul32_by_16(temp1, h12); + *(ptr_hybrRightReal) = fxp_mac32_by_16(temp2, h22, temp3) << 1; + + ptr_hybrLeftImag = &qmfLeftImag[ 3]; + ptr_hybrRightImag = &qmfRightImag[ 3]; + + + temp1 = *(ptr_hybrLeftImag) << 1; + temp2 = *(ptr_hybrRightImag) << 1; + + temp3 = fxp_mul32_by_16(temp1, h11); + *(ptr_hybrLeftImag) = fxp_mac32_by_16(temp2, h21, temp3) << 1; + + temp3 = fxp_mul32_by_16(temp1, h12); + *(ptr_hybrRightImag) = fxp_mac32_by_16(temp2, h22, temp3) << 1; + + + for (group = SUBQMF_GROUPS + 1; group < NO_IID_GROUPS; group++) /* 11 to NO_IID_GROUPS == 22 */ + { + temp1 = pms->deltaH11[group]; + temp2 = pms->deltaH12[group]; + + pms->H11[group] += temp1; + h11 = (Int16)(pms->H11[group] >> 16); + pms->H12[group] += temp2; + h12 = (Int16)(pms->H12[group] >> 16); + + temp1 = pms->deltaH21[group]; + temp2 = pms->deltaH22[group]; + + pms->H21[group] += temp1; + h21 = (Int16)(pms->H21[group] >> 16); + pms->H22[group] += temp2; + h22 = (Int16)(pms->H22[group] >> 16); + + index = groupBorders[group]; + maxSubband = groupBorders[group + 1]; + maxSubband = min(usb, maxSubband); + + /* + * Reconstruction of Stereo sub-band signal + * + * l_k(n) = H11(k,n)*s_k(n) + H21(k,n)*d_k(n) + * + * r_k(n) = H12(k,n)*s_k(n) + H22(k,n)*d_k(n) + */ + + ptr_hybrLeftReal = &qmfLeftReal[ index]; + ptr_hybrRightReal = &qmfRightReal[ index]; + + for (subband = index; subband < maxSubband; subband++) + { + temp1 = *(ptr_hybrLeftReal) << 1; + temp2 = *(ptr_hybrRightReal) << 1; + temp3 = fxp_mul32_by_16(temp1, h11); + *(ptr_hybrLeftReal++) = fxp_mac32_by_16(temp2, h21, temp3) << 1; + + temp3 = fxp_mul32_by_16(temp1, h12); + *(ptr_hybrRightReal++) = fxp_mac32_by_16(temp2, h22, temp3) << 1; + } + + ptr_hybrLeftImag = &qmfLeftImag[ index]; + ptr_hybrRightImag = &qmfRightImag[ index]; + + for (subband = index; subband < maxSubband; subband++) + { + temp1 = *(ptr_hybrLeftImag) << 1; + temp2 = *(ptr_hybrRightImag) << 1; + temp3 = fxp_mul32_by_16(temp1, h11); + *(ptr_hybrLeftImag++) = fxp_mac32_by_16(temp2, h21, temp3) << 1; + + temp3 = fxp_mul32_by_16(temp1, h12); + *(ptr_hybrRightImag++) = fxp_mac32_by_16(temp2, h22, temp3) << 1; + + } /* subband loop */ + + } /* groups loop */ + +} /* END ps_stereo_processing */ + + +#endif + + +#endif + |