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Diffstat (limited to 'libAACdec/src/channel.h')
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diff --git a/libAACdec/src/channel.h b/libAACdec/src/channel.h new file mode 100644 index 0000000..4c428c8 --- /dev/null +++ b/libAACdec/src/channel.h @@ -0,0 +1,148 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. + All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements +the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. +This FDK AAC Codec software is intended to be used on a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual +audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by +independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part +of the MPEG specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) +may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners +individually for the purpose of encoding or decoding bit streams in products that are compliant with +the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license +these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec +software may already be covered under those patent licenses when it is used for those licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, +are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional +applications information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, are permitted without +payment of copyright license fees provided that you satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of the FDK AAC Codec or +your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation and/or other materials +provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. +You must make available free of charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived from this library without +prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec +software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software +and the date of any change. For modified versions of the FDK AAC Codec, the term +"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term +"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, +ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with +respect to this software. + +You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized +by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors +"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties +of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, +including but not limited to procurement of substitute goods or services; loss of use, data, or profits, +or business interruption, however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of this software, even if +advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------------------------------------- */ + +/***************************** MPEG-4 AAC Decoder ************************** + + Author(s): Josef Hoepfl + Description: + +******************************************************************************/ + +#ifndef CHANNEL_H +#define CHANNEL_H + +#include "common_fix.h" + +#include "FDK_bitstream.h" +#include "channelinfo.h" +#include "tpdec_lib.h" + +/** + * \brief Init codeBook SFB indices (section data) with HCB_ESC. Useful for bitstreams + * which do not have any section data, but still SFB's (scale factor bands). This has + * the effect that upto the amount of transmitted SFB are treated as non-zero. + * \param pAacDecoderChannelInfo channel info structure containing a valid icsInfo struct. + */ +void CChannel_CodebookTableInit(CAacDecoderChannelInfo *pAacDecoderChannelInfo); + +/** + * \brief decode a channel element. To be called after CChannelElement_Read() + * \param pAacDecoderChannelInfo pointer to channel data struct. Depending on el_channels either one or two. + * \param pSamplingRateInfo pointer to sample rate information structure + * \param el_channels amount of channels of the element to be decoded. + * \param output pointer to time domain output buffer (ACELP) + * \param stride factor for accessing output + */ +void CChannelElement_Decode ( CAacDecoderChannelInfo *pAacDecoderChannelInfo[2], + CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2], + SamplingRateInfo *pSamplingRateInfo, + UINT flags, + int el_channels ); + + +/** + * \brief Read channel element of given type from bitstream. + * \param hBs bitstream handle to access bitstream data. + * \param pAacDecoderChannelInfo pointer array to store channel information. + * \param aot Audio Object Type + * \param pSamplingRateInfo sampling rate info table. + * \param flags parser guidance flags + * \param numberOfChannels amoun of channels contained in the object to be parsed. + * \param epConfig the current epConfig value obtained from the Audio Specific Config. + * \param pTp transport decoder handle required for ADTS CRC checking. + * ... + * \return an AAC_DECODER_ERROR error code. + */ +AAC_DECODER_ERROR CChannelElement_Read(HANDLE_FDK_BITSTREAM hBs, + CAacDecoderChannelInfo *pAacDecoderChannelInfo[], + CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], + const AUDIO_OBJECT_TYPE aot, + const SamplingRateInfo *pSamplingRateInfo, + const UINT flags, + const UINT frame_length, + const UCHAR numberOfChannels, + const SCHAR epConfig, + HANDLE_TRANSPORTDEC pTpDec + ); + +#endif /* #ifndef CHANNEL_H */ |