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Diffstat (limited to 'libSYS/include/wav_file.h')
| -rw-r--r-- | libSYS/include/wav_file.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/libSYS/include/wav_file.h b/libSYS/include/wav_file.h new file mode 100644 index 0000000..bebf112 --- /dev/null +++ b/libSYS/include/wav_file.h @@ -0,0 +1,150 @@ +/************************** Fraunhofer IIS FDK SysLib ********************** + + (C) Copyright Fraunhofer IIS (2000) + All Rights Reserved + + Please be advised that this software and/or program delivery is + Confidential Information of Fraunhofer and subject to and covered by the + + Fraunhofer IIS Software Evaluation Agreement + between Google Inc. and Fraunhofer + effective and in full force since March 1, 2012. + + You may use this software and/or program only under the terms and + conditions described in the above mentioned Fraunhofer IIS Software + Evaluation Agreement. Any other and/or further use requires a separate agreement. + + + $Id$ + Author(s): Eric Allamanche + + This software and/or program is protected by copyright law and international + treaties. Any reproduction or distribution of this software and/or program, + or any portion of it, may result in severe civil and criminal penalties, and + will be prosecuted to the maximum extent possible under law. + +******************************************************************************/ + +/** \file wav_file.h + * \brief Rudimentary WAVE file read/write support. + * + * The WAVE file reader/writer is intented to be used in the codec's example + * framework for easily getting started with encoding/decoding. Therefore + * it serves mainly for helping quickly understand how a codec's API actually + * works. + * Being a WAVE file reader/writer with very basic functionality, it may not be + * able to read WAVE files that come with unusual configurations. + * Details on how to use the interface functions can be found in every + * (encoder/decoder) example framework. + */ + +#ifndef __WAV_FILE_H__ +#define __WAV_FILE_H__ + + + +#include "genericStds.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/*! + * RIFF WAVE file struct. + * For details see WAVE file format documentation (for example at http://www.wotsit.org). + */ +typedef struct WAV_HEADER +{ + char riffType[4]; + UINT riffSize; + char waveType[4]; + char formatType[4]; + UINT formatSize; + USHORT compressionCode; + USHORT numChannels; + UINT sampleRate; + UINT bytesPerSecond; + USHORT blockAlign; + USHORT bitsPerSample; + char dataType[4]; + UINT dataSize; +} WAV_HEADER; + +struct WAV +{ + WAV_HEADER header; + FDKFILE *fp; +}; + +typedef struct WAV *HANDLE_WAV; + +/** + * \brief Open a WAV file handle for reading. + * + * \param pWav Pointer to a memory location, where a WAV handle is returned. + * \param filename File name to be opened. + * + * \return 0 on success and non-zero on failure. + */ +INT WAV_InputOpen (HANDLE_WAV *pWav, const char *filename); + +/** + * \brief Read samples from a WAVE file. The samples are automatically re-ordered to the + * native host endianess and scaled to full scale of the INT_PCM type, from + * whatever BPS the WAVE file had specified in its header data. + * + * \param wav Handle of WAV file. + * \param sampleBuffer Pointer to store audio data. + * \param numSamples Desired number of samples to read. + * \param nBufBits Size in bit of each audio sample of sampleBuffer. + * + * \return Number of samples actually read. + */ +INT WAV_InputRead (HANDLE_WAV wav, void *sampleBuffer, UINT numSamples, int nBufBits); + +/** + * \brief Close a WAV file reading handle. + * \param pWav Pointer to a WAV file reading handle. + * \return void + */ +void WAV_InputClose(HANDLE_WAV *pWav); + +/** + * \brief Open WAV output/writer handle. + * + * \param pWav Pointer to WAV handle to be returned. + * \param outputFilename File name of the file to be written to. + * \param sampleRate Desired samplerate of the resulting WAV file. + * \param numChannels Desired number of audio channels of the resulting WAV file. + * \param bitsPerSample Desired number of bits per audio sample of the resulting WAV file. + * + * \return 0: ok; -1: error + */ +INT WAV_OutputOpen(HANDLE_WAV *pWav, const char *outputFilename, INT sampleRate, INT numChannels, INT bitsPerSample); + +/** + * \brief Write data to WAV file asociated to WAV handle. + * + * \param wav Handle of WAV file + * \param sampleBuffer Pointer to audio samples, right justified integer values. + * \param numberOfSamples The number of individual audio sample valuesto be written. + * \param nBufBits Size in bits of each audio sample in sampleBuffer. + * \param nSigBits Amount of significant bits of each nBufBits in sampleBuffer. + * + * \return 0: ok; -1: error + */ +INT WAV_OutputWrite(HANDLE_WAV wav, void *sampleBuffer, UINT numberOfSamples, int nBufBits, int nSigBits); + +/** + * \brief Close WAV output handle. + * \param pWav Pointer to WAV handle. *pWav is set to NULL. + * \return void + */ +void WAV_OutputClose(HANDLE_WAV *pWav); + +#ifdef __cplusplus +} +#endif + + +#endif /* __WAV_FILE_H__ */ |