mirror of https://github.com/mstorsjo/fdk-aac.git
209 lines
8.7 KiB
C++
209 lines
8.7 KiB
C++
/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/**************************** AAC encoder library ******************************
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Author(s): M. Lohwasser, M. Gayer
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Description:
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*******************************************************************************/
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/*!
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\file
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\brief Memory layout
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\author Markus Lohwasser
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*/
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#include "aacEnc_ram.h"
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C_AALLOC_MEM(AACdynamic_RAM, FIXP_DBL, AAC_ENC_DYN_RAM_SIZE / sizeof(FIXP_DBL))
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/*
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Static memory areas, must not be overwritten in other sections of the decoder
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!
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*/
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/*
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The structure AacEncoder contains all Encoder structures.
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*/
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C_ALLOC_MEM(Ram_aacEnc_AacEncoder, struct AAC_ENC, 1)
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/*
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The structure PSY_INTERNAl contains all psych configuration and data pointer.
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* PsyStatic holds last and current Psych data.
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* PsyInputBuffer contains time input. Signal is needed at the beginning of
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Psych. Memory can be reused after signal is in time domain.
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* PsyData contains spectral, nrg and threshold information. Necessary data
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are copied into PsyOut, so memory is available after leaving psych.
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* TnsData, ChaosMeasure, PnsData are temporarily necessary, e.g. use memory
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from PsyInputBuffer.
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*/
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C_ALLOC_MEM2(Ram_aacEnc_PsyElement, PSY_ELEMENT, 1, ((8)))
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C_ALLOC_MEM(Ram_aacEnc_PsyInternal, PSY_INTERNAL, 1)
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C_ALLOC_MEM2(Ram_aacEnc_PsyStatic, PSY_STATIC, 1, (8))
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C_ALLOC_MEM2(Ram_aacEnc_PsyInputBuffer, INT_PCM, MAX_INPUT_BUFFER_SIZE, (8))
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PSY_DYNAMIC *GetRam_aacEnc_PsyDynamic(int n, UCHAR *dynamic_RAM) {
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FDK_ASSERT(dynamic_RAM != 0);
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/* The reinterpret_cast is used to suppress a compiler warning. We know that
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* (dynamic_RAM + P_BUF_1 + n*sizeof(PSY_DYNAMIC)) is sufficiently aligned, so
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* the cast is safe */
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return reinterpret_cast<PSY_DYNAMIC *>(reinterpret_cast<void *>(
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dynamic_RAM + P_BUF_1 + n * sizeof(PSY_DYNAMIC)));
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}
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/*
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The structure PSY_OUT holds all psychoaccoustic data needed
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in quantization module
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*/
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C_ALLOC_MEM2(Ram_aacEnc_PsyOut, PSY_OUT, 1, (1))
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C_ALLOC_MEM2(Ram_aacEnc_PsyOutElements, PSY_OUT_ELEMENT, 1, (1) * ((8)))
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C_ALLOC_MEM2(Ram_aacEnc_PsyOutChannel, PSY_OUT_CHANNEL, 1, (1) * (8))
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/*
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The structure QC_STATE contains preinitialized settings and quantizer
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structures.
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* AdjustThreshold structure contains element-wise settings.
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* ElementBits contains elemnt-wise bit consumption settings.
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* When CRC is active, lookup table is necessary for fast crc calculation.
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* Bitcounter contains buffer to find optimal codebooks and minimal bit
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consumption. Values are temporarily, so dynamic memory can be used.
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*/
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C_ALLOC_MEM(Ram_aacEnc_QCstate, QC_STATE, 1)
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C_ALLOC_MEM(Ram_aacEnc_AdjustThreshold, ADJ_THR_STATE, 1)
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C_ALLOC_MEM2(Ram_aacEnc_AdjThrStateElement, ATS_ELEMENT, 1, ((8)))
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C_ALLOC_MEM2(Ram_aacEnc_ElementBits, ELEMENT_BITS, 1, ((8)))
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C_ALLOC_MEM(Ram_aacEnc_BitCntrState, struct BITCNTR_STATE, 1)
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INT *GetRam_aacEnc_BitLookUp(int n, UCHAR *dynamic_RAM) {
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FDK_ASSERT(dynamic_RAM != 0);
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/* The reinterpret_cast is used to suppress a compiler warning. We know that
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* (dynamic_RAM + P_BUF_1) is sufficiently aligned, so the cast is safe */
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return reinterpret_cast<INT *>(
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reinterpret_cast<void *>(dynamic_RAM + P_BUF_1));
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}
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INT *GetRam_aacEnc_MergeGainLookUp(int n, UCHAR *dynamic_RAM) {
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FDK_ASSERT(dynamic_RAM != 0);
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/* The reinterpret_cast is used to suppress a compiler warning. We know that
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* (dynamic_RAM + P_BUF_1 + sizeof(INT)*(MAX_SFB_LONG*(CODE_BOOK_ESC_NDX+1)))
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* is sufficiently aligned, so the cast is safe */
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return reinterpret_cast<INT *>(reinterpret_cast<void *>(
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dynamic_RAM + P_BUF_1 +
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sizeof(INT) * (MAX_SFB_LONG * (CODE_BOOK_ESC_NDX + 1))));
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}
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/*
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The structure QC_OUT contains settings and structures holding all necessary
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information needed in bitstreamwriter.
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*/
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C_ALLOC_MEM2(Ram_aacEnc_QCout, QC_OUT, 1, (1))
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C_ALLOC_MEM2(Ram_aacEnc_QCelement, QC_OUT_ELEMENT, 1, (1) * ((8)))
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QC_OUT_CHANNEL *GetRam_aacEnc_QCchannel(int n, UCHAR *dynamic_RAM) {
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FDK_ASSERT(dynamic_RAM != 0);
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/* The reinterpret_cast is used to suppress a compiler warning. We know that
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* (dynamic_RAM + P_BUF_0 + n*sizeof(QC_OUT_CHANNEL)) is sufficiently aligned,
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* so the cast is safe */
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return reinterpret_cast<QC_OUT_CHANNEL *>(reinterpret_cast<void *>(
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dynamic_RAM + P_BUF_0 + n * sizeof(QC_OUT_CHANNEL)));
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}
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