151 lines
4.8 KiB
C
151 lines
4.8 KiB
C
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/************************** Fraunhofer IIS FDK SysLib **********************
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(C) Copyright Fraunhofer IIS (2000)
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All Rights Reserved
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Please be advised that this software and/or program delivery is
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Confidential Information of Fraunhofer and subject to and covered by the
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Fraunhofer IIS Software Evaluation Agreement
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between Google Inc. and Fraunhofer
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effective and in full force since March 1, 2012.
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You may use this software and/or program only under the terms and
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conditions described in the above mentioned Fraunhofer IIS Software
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Evaluation Agreement. Any other and/or further use requires a separate agreement.
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$Id$
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Author(s): Eric Allamanche
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This software and/or program is protected by copyright law and international
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treaties. Any reproduction or distribution of this software and/or program,
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or any portion of it, may result in severe civil and criminal penalties, and
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will be prosecuted to the maximum extent possible under law.
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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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