1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5� Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and the date of any change. For modified versions of the FDK AAC Codec, the term 50"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@iis.fraunhofer.de 82----------------------------------------------------------------------------------------------------------- */ 83 84/***************************** MPEG-4 AAC Decoder ************************** 85 86 Author(s): Josef Hoepfl 87 Description: 88 89******************************************************************************/ 90 91#ifndef CHANNEL_H 92#define CHANNEL_H 93 94#include "common_fix.h" 95 96#include "FDK_bitstream.h" 97#include "channelinfo.h" 98#include "tpdec_lib.h" 99 100/** 101 * \brief Init codeBook SFB indices (section data) with HCB_ESC. Useful for bitstreams 102 * which do not have any section data, but still SFB's (scale factor bands). This has 103 * the effect that upto the amount of transmitted SFB are treated as non-zero. 104 * \param pAacDecoderChannelInfo channel info structure containing a valid icsInfo struct. 105 */ 106void CChannel_CodebookTableInit(CAacDecoderChannelInfo *pAacDecoderChannelInfo); 107 108/** 109 * \brief decode a channel element. To be called after CChannelElement_Read() 110 * \param pAacDecoderChannelInfo pointer to channel data struct. Depending on el_channels either one or two. 111 * \param pSamplingRateInfo pointer to sample rate information structure 112 * \param el_channels amount of channels of the element to be decoded. 113 * \param output pointer to time domain output buffer (ACELP) 114 * \param stride factor for accessing output 115 */ 116void CChannelElement_Decode ( CAacDecoderChannelInfo *pAacDecoderChannelInfo[2], 117 CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2], 118 SamplingRateInfo *pSamplingRateInfo, 119 UINT flags, 120 int el_channels ); 121 122 123/** 124 * \brief Read channel element of given type from bitstream. 125 * \param hBs bitstream handle to access bitstream data. 126 * \param pAacDecoderChannelInfo pointer array to store channel information. 127 * \param aot Audio Object Type 128 * \param pSamplingRateInfo sampling rate info table. 129 * \param flags parser guidance flags 130 * \param numberOfChannels amoun of channels contained in the object to be parsed. 131 * \param epConfig the current epConfig value obtained from the Audio Specific Config. 132 * \param pTp transport decoder handle required for ADTS CRC checking. 133 * ... 134 * \return an AAC_DECODER_ERROR error code. 135 */ 136AAC_DECODER_ERROR CChannelElement_Read(HANDLE_FDK_BITSTREAM hBs, 137 CAacDecoderChannelInfo *pAacDecoderChannelInfo[], 138 CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], 139 const AUDIO_OBJECT_TYPE aot, 140 const SamplingRateInfo *pSamplingRateInfo, 141 const UINT flags, 142 const UINT frame_length, 143 const UCHAR numberOfChannels, 144 const SCHAR epConfig, 145 HANDLE_TRANSPORTDEC pTpDec 146 ); 147 148#endif /* #ifndef CHANNEL_H */ 149