1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung 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/************************** Fraunhofer IIS FDK SysLib ********************** 85 86 Author(s): Eric Allamanche 87 88******************************************************************************/ 89 90/** \file wav_file.h 91 * \brief Rudimentary WAVE file read/write support. 92 * 93 * The WAVE file reader/writer is intented to be used in the codec's example 94 * framework for easily getting started with encoding/decoding. Therefore 95 * it serves mainly for helping quickly understand how a codec's API actually 96 * works. 97 * Being a WAVE file reader/writer with very basic functionality, it may not be 98 * able to read WAVE files that come with unusual configurations. 99 * Details on how to use the interface functions can be found in every 100 * (encoder/decoder) example framework. 101 */ 102 103#ifndef __WAV_FILE_H__ 104#define __WAV_FILE_H__ 105 106 107 108#include "genericStds.h" 109 110#ifdef __cplusplus 111extern "C" { 112#endif 113 114/*! 115 * RIFF WAVE file struct. 116 * For details see WAVE file format documentation (for example at http://www.wotsit.org). 117 */ 118typedef struct WAV_HEADER 119{ 120 char riffType[4]; 121 UINT riffSize; 122 char waveType[4]; 123 char formatType[4]; 124 UINT formatSize; 125 USHORT compressionCode; 126 USHORT numChannels; 127 UINT sampleRate; 128 UINT bytesPerSecond; 129 USHORT blockAlign; 130 USHORT bitsPerSample; 131 char dataType[4]; 132 UINT dataSize; 133} WAV_HEADER; 134 135struct WAV 136{ 137 WAV_HEADER header; 138 FDKFILE *fp; 139}; 140 141typedef struct WAV *HANDLE_WAV; 142 143/** 144 * \brief Open a WAV file handle for reading. 145 * 146 * \param pWav Pointer to a memory location, where a WAV handle is returned. 147 * \param filename File name to be opened. 148 * 149 * \return 0 on success and non-zero on failure. 150 */ 151INT WAV_InputOpen (HANDLE_WAV *pWav, const char *filename); 152 153/** 154 * \brief Read samples from a WAVE file. The samples are automatically re-ordered to the 155 * native host endianess and scaled to full scale of the INT_PCM type, from 156 * whatever BPS the WAVE file had specified in its header data. 157 * 158 * \param wav Handle of WAV file. 159 * \param sampleBuffer Pointer to store audio data. 160 * \param numSamples Desired number of samples to read. 161 * \param nBufBits Size in bit of each audio sample of sampleBuffer. 162 * 163 * \return Number of samples actually read. 164 */ 165INT WAV_InputRead (HANDLE_WAV wav, void *sampleBuffer, UINT numSamples, int nBufBits); 166 167/** 168 * \brief Close a WAV file reading handle. 169 * \param pWav Pointer to a WAV file reading handle. 170 * \return void 171 */ 172void WAV_InputClose(HANDLE_WAV *pWav); 173 174/** 175 * \brief Open WAV output/writer handle. 176 * 177 * \param pWav Pointer to WAV handle to be returned. 178 * \param outputFilename File name of the file to be written to. 179 * \param sampleRate Desired samplerate of the resulting WAV file. 180 * \param numChannels Desired number of audio channels of the resulting WAV file. 181 * \param bitsPerSample Desired number of bits per audio sample of the resulting WAV file. 182 * 183 * \return 0: ok; -1: error 184 */ 185INT WAV_OutputOpen(HANDLE_WAV *pWav, const char *outputFilename, INT sampleRate, INT numChannels, INT bitsPerSample); 186 187/** 188 * \brief Write data to WAV file asociated to WAV handle. 189 * 190 * \param wav Handle of WAV file 191 * \param sampleBuffer Pointer to audio samples, right justified integer values. 192 * \param numberOfSamples The number of individual audio sample valuesto be written. 193 * \param nBufBits Size in bits of each audio sample in sampleBuffer. 194 * \param nSigBits Amount of significant bits of each nBufBits in sampleBuffer. 195 * 196 * \return 0: ok; -1: error 197 */ 198INT WAV_OutputWrite(HANDLE_WAV wav, void *sampleBuffer, UINT numberOfSamples, int nBufBits, int nSigBits); 199 200/** 201 * \brief Close WAV output handle. 202 * \param pWav Pointer to WAV handle. *pWav is set to NULL. 203 * \return void 204 */ 205void WAV_OutputClose(HANDLE_WAV *pWav); 206 207#ifdef __cplusplus 208} 209#endif 210 211 212#endif /* __WAV_FILE_H__ */ 213