diff options
Diffstat (limited to 'media/libstagefright/codecs/aacdec/decode_noise_floorlevels.cpp')
-rw-r--r-- | media/libstagefright/codecs/aacdec/decode_noise_floorlevels.cpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/decode_noise_floorlevels.cpp b/media/libstagefright/codecs/aacdec/decode_noise_floorlevels.cpp new file mode 100644 index 0000000..41cd187 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/decode_noise_floorlevels.cpp @@ -0,0 +1,163 @@ +/* ------------------------------------------------------------------ + * 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: decode_noise_floorlevels.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 + +------------------------------------------------------------------------------ +*/ + +#ifdef AAC_PLUS + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "decode_noise_floorlevels.h" +#include "sbr_constants.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 decode_noise_floorlevels(SBR_FRAME_DATA * hFrameData) + +{ + Int32 env; + Int32 i; + + Int32 * frameInfo = hFrameData->frameInfo; + Int32 nNfb = hFrameData->nNfb; + Int32 * domain_vec = hFrameData->domain_vec2; + + Int32 * sbrNoiseFloorLevel_man = hFrameData->sbrNoiseFloorLevel_man; + Int32 * prevNoiseLevel_man = hFrameData->prevNoiseLevel_man; + + Int32 nEnv = frameInfo[(frameInfo[0] << 1) + 3]; + + for (env = 0; env < nEnv; env++) + { + if (domain_vec[env] == 0) + { + prevNoiseLevel_man[0] = *(sbrNoiseFloorLevel_man++); + + for (i = 1; i < nNfb; i++) + { + *sbrNoiseFloorLevel_man += *(sbrNoiseFloorLevel_man - 1); + prevNoiseLevel_man[i] = *(sbrNoiseFloorLevel_man++); + } + } + else + { + for (i = 0; i < nNfb; i++) + { + *sbrNoiseFloorLevel_man += prevNoiseLevel_man[i]; + prevNoiseLevel_man[i] = *(sbrNoiseFloorLevel_man++); + } + } + + } +} + +#endif |