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Diffstat (limited to 'libSBRdec/src/sbr_ram.cpp')
| -rw-r--r-- | libSBRdec/src/sbr_ram.cpp | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/libSBRdec/src/sbr_ram.cpp b/libSBRdec/src/sbr_ram.cpp new file mode 100644 index 0000000..6fa34a5 --- /dev/null +++ b/libSBRdec/src/sbr_ram.cpp @@ -0,0 +1,136 @@ +/**************************************************************************** + + (C) Copyright Fraunhofer IIS (2005) + All Rights Reserved + + Please be advised that this software and/or program delivery is + Confidential Information of Fraunhofer and subject to and covered by the + + Fraunhofer IIS Software Evaluation Agreement + between Google Inc. and Fraunhofer + effective and in full force since March 1, 2012. + + You may use this software and/or program only under the terms and + conditions described in the above mentioned Fraunhofer IIS Software + Evaluation Agreement. Any other and/or further use requires a separate agreement. + + + This software and/or program is protected by copyright law and international + treaties. Any reproduction or distribution of this software and/or program, + or any portion of it, may result in severe civil and criminal penalties, and + will be prosecuted to the maximum extent possible under law. + + $Id$ + +*******************************************************************************/ +/*! + \file + \brief Memory layout + $Revision: 36841 $ + + This module declares all static and dynamic memory spaces +*/ + +#include "sbr_ram.h" + + + + +#define WORKBUFFER1_TAG 0 +#define WORKBUFFER2_TAG 1 + +/*! + \name StaticSbrData + + Static memory areas, must not be overwritten in other sections of the decoder +*/ +/* @{ */ + +/*! SBR Decoder main structure */ +C_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE, 1) +/*! SBR Decoder element data <br> + Dimension: (4) */ +C_ALLOC_MEM2(Ram_SbrDecElement, SBR_DECODER_ELEMENT, 1, (4)) +/*! SBR Decoder individual channel data <br> + Dimension: (6) */ +C_ALLOC_MEM2(Ram_SbrDecChannel, SBR_CHANNEL, 1, (6)+1) + +/*! Filter states for QMF-synthesis. <br> + Dimension: #(6) * (#QMF_FILTER_STATE_SYN_SIZE-#(64)) */ +C_AALLOC_MEM2_L(Ram_sbr_QmfStatesSynthesis, FIXP_QSS, (640)-(64), (6)+1, SECT_DATA_L1) + +/*! Delayed spectral data needed for the dynamic framing of SBR. + For mp3PRO, 1/3 of a frame is buffered (#(6) 6) */ +C_AALLOC_MEM2(Ram_sbr_OverlapBuffer, FIXP_DBL, 2 * (6) * (64), (6)+1) + +/*! Static Data of PS */ + +C_ALLOC_MEM(Ram_ps_dec, PS_DEC, 1) + + +/* @} */ + + +/*! + \name DynamicSbrData + + Dynamic memory areas, might be reused in other algorithm sections, + e.g. the core decoder + <br> + Depending on the mode set by DONT_USE_CORE_WORKBUFFER, workbuffers are + defined additionally to the CoreWorkbuffer. + <br> + The size of WorkBuffers is ((1024)/(32))*(64) = 2048. + <br> + WorkBuffer2 is a pointer to the CoreWorkBuffer wich is reused here in the SBR part. In case of + DONT_USE_CORE_WORKBUFFER, the CoreWorkbuffer is not used and the according + Workbuffer2 is defined locally in this file. + <br> + WorkBuffer1 is reused in the AAC core (-> aacdecoder.cpp, aac_ram.cpp) + <br> + + Use of WorkBuffers: + <pre> + + ------------------------------------------------------------- + AAC core: + + CoreWorkbuffer: spectral coefficients + WorkBuffer1: CAacDecoderChannelInfo, CAacDecoderDynamicData + + ------------------------------------------------------------- + SBR part: + ---------------------------------------------- + Low Power Mode (useLP=1 or LOW_POWER_SBR_ONLY), see assignLcTimeSlots() + + SLOT_BASED_PROTOTYPE_SYN_FILTER + + WorkBuffer1 WorkBuffer2(=CoreWorkbuffer) + ________________ ________________ + | RealLeft | | RealRight | + |________________| |________________| + + ---------------------------------------------- + High Quality Mode (!LOW_POWER_SBR_ONLY and useLP=0), see assignHqTimeSlots() + + SLOTBASED_PS + + WorkBuffer1 WorkBuffer2(=CoreWorkbuffer) + ________________ ________________ + | Real/Imag | interleaved | Real/Imag | interleaved + |________________| first half actual ch |________________| second half actual ch + + ------------------------------------------------------------- + + </pre> + +*/ +/* @{ */ +C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer1, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L1, WORKBUFFER1_TAG) +C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer2, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L2, WORKBUFFER2_TAG) + +/* @} */ + + + + |