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Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_hybrid_filter_bank_allocation.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_hybrid_filter_bank_allocation.cpp | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_hybrid_filter_bank_allocation.cpp b/media/libstagefright/codecs/aacdec/ps_hybrid_filter_bank_allocation.cpp new file mode 100644 index 0000000..4ff2385 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_hybrid_filter_bank_allocation.cpp @@ -0,0 +1,213 @@ +/* ------------------------------------------------------------------ + * 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_filter_bank_allocation.c + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Who: Date: MM/DD/YYYY + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Does Hybrid filter bank memory allocation + +------------------------------------------------------------------------------ + 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 "aac_mem_funcs.h" +#include "ps_hybrid_filter_bank_allocation.h" +#include "ps_all_pass_filter_coeff.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 +----------------------------------------------------------------------------*/ + +Int32 ps_hybrid_filter_bank_allocation(HYBRID **phHybrid, + Int32 noBands, + const Int32 *pResolution, + Int32 **pPtr) +{ + Int32 i; + Int32 tmp; + Int32 maxNoChannels = 0; + HYBRID *hs; + Int32 *ptr = *pPtr; + + + *phHybrid = (HYBRID *)NULL; + + hs = (HYBRID *)ptr; + + ptr += sizeof(HYBRID) / sizeof(*ptr); + + hs->pResolution = (Int32*)ptr; + + ptr += noBands * sizeof(Int32) / sizeof(*ptr); + + for (i = 0; i < noBands; i++) + { + + hs->pResolution[i] = pResolution[i]; + + if (pResolution[i] != HYBRID_8_CPLX && + pResolution[i] != HYBRID_2_REAL && + pResolution[i] != HYBRID_4_CPLX) + { + return 1; + } + + if (pResolution[i] > maxNoChannels) + { + maxNoChannels = pResolution[i]; + } + } + + hs->nQmfBands = noBands; + hs->qmfBufferMove = HYBRID_FILTER_LENGTH - 1; + + hs->mQmfBufferReal = (Int32 **)ptr; + ptr += noBands * sizeof(ptr) / sizeof(*ptr); + + hs->mQmfBufferImag = (Int32 **)ptr; + ptr += noBands * sizeof(ptr) / sizeof(*ptr); + + tmp = hs->qmfBufferMove; /* HYBRID_FILTER_LENGTH == 13 */ + + for (i = 0; i < noBands; i++) + { + hs->mQmfBufferReal[i] = ptr; + ptr += tmp; + + hs->mQmfBufferImag[i] = ptr; + ptr += tmp; + + } + + hs->mTempReal = ptr; + ptr += maxNoChannels; + + + hs->mTempImag = ptr; + ptr += maxNoChannels; + + + *phHybrid = hs; + *pPtr = ptr; + + return 0; +} + + +#endif + + +#endif + |