213 lines
8.4 KiB
C
213 lines
8.4 KiB
C
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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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 that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on 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 general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications 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, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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You must make available free of 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 from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK 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 limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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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 holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and 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, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, 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 this software, even if
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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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/************************** Fraunhofer IIS FDK SysLib **********************
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Author(s): Eric Allamanche
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******************************************************************************/
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/** \file wav_file.h
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* \brief Rudimentary WAVE file read/write support.
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*
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* The WAVE file reader/writer is intented to be used in the codec's example
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* framework for easily getting started with encoding/decoding. Therefore
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* it serves mainly for helping quickly understand how a codec's API actually
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* works.
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* Being a WAVE file reader/writer with very basic functionality, it may not be
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* able to read WAVE files that come with unusual configurations.
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* Details on how to use the interface functions can be found in every
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* (encoder/decoder) example framework.
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*/
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#ifndef __WAV_FILE_H__
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#define __WAV_FILE_H__
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#include "genericStds.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*!
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* RIFF WAVE file struct.
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* For details see WAVE file format documentation (for example at http://www.wotsit.org).
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*/
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typedef struct WAV_HEADER
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{
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char riffType[4];
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UINT riffSize;
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char waveType[4];
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char formatType[4];
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UINT formatSize;
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USHORT compressionCode;
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USHORT numChannels;
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UINT sampleRate;
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UINT bytesPerSecond;
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USHORT blockAlign;
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USHORT bitsPerSample;
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char dataType[4];
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UINT dataSize;
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} WAV_HEADER;
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struct WAV
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{
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WAV_HEADER header;
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FDKFILE *fp;
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};
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typedef struct WAV *HANDLE_WAV;
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/**
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* \brief Open a WAV file handle for reading.
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*
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* \param pWav Pointer to a memory location, where a WAV handle is returned.
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* \param filename File name to be opened.
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*
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* \return 0 on success and non-zero on failure.
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*/
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INT WAV_InputOpen (HANDLE_WAV *pWav, const char *filename);
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/**
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* \brief Read samples from a WAVE file. The samples are automatically re-ordered to the
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* native host endianess and scaled to full scale of the INT_PCM type, from
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* whatever BPS the WAVE file had specified in its header data.
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*
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* \param wav Handle of WAV file.
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* \param sampleBuffer Pointer to store audio data.
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* \param numSamples Desired number of samples to read.
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* \param nBufBits Size in bit of each audio sample of sampleBuffer.
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*
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* \return Number of samples actually read.
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*/
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INT WAV_InputRead (HANDLE_WAV wav, void *sampleBuffer, UINT numSamples, int nBufBits);
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/**
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* \brief Close a WAV file reading handle.
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* \param pWav Pointer to a WAV file reading handle.
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* \return void
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*/
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void WAV_InputClose(HANDLE_WAV *pWav);
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/**
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* \brief Open WAV output/writer handle.
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*
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* \param pWav Pointer to WAV handle to be returned.
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* \param outputFilename File name of the file to be written to.
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* \param sampleRate Desired samplerate of the resulting WAV file.
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* \param numChannels Desired number of audio channels of the resulting WAV file.
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* \param bitsPerSample Desired number of bits per audio sample of the resulting WAV file.
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*
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* \return 0: ok; -1: error
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*/
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INT WAV_OutputOpen(HANDLE_WAV *pWav, const char *outputFilename, INT sampleRate, INT numChannels, INT bitsPerSample);
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/**
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* \brief Write data to WAV file asociated to WAV handle.
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*
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* \param wav Handle of WAV file
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* \param sampleBuffer Pointer to audio samples, right justified integer values.
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* \param numberOfSamples The number of individual audio sample valuesto be written.
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* \param nBufBits Size in bits of each audio sample in sampleBuffer.
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* \param nSigBits Amount of significant bits of each nBufBits in sampleBuffer.
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*
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* \return 0: ok; -1: error
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*/
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INT WAV_OutputWrite(HANDLE_WAV wav, void *sampleBuffer, UINT numberOfSamples, int nBufBits, int nSigBits);
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/**
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* \brief Close WAV output handle.
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* \param pWav Pointer to WAV handle. *pWav is set to NULL.
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* \return void
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*/
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void WAV_OutputClose(HANDLE_WAV *pWav);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __WAV_FILE_H__ */
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