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/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// A WAV audio file source
// NOTE: Samples are returned in little-endian order (the same order in which
// they were stored in the file).
// C++ header
#ifndef _WAV_AUDIO_FILE_SOURCE_HH
#define _WAV_AUDIO_FILE_SOURCE_HH
#ifndef _AUDIO_INPUT_DEVICE_HH
#include "AudioInputDevice.hh"
#endif
class WAVAudioFileSource: public AudioInputDevice {
public:
static WAVAudioFileSource* createNew(UsageEnvironment& env,
char const* fileName);
unsigned numPCMBytes() const;
void setScaleFactor(int scale);
void seekToPCMByte(unsigned byteNumber);
protected:
WAVAudioFileSource(UsageEnvironment& env, FILE* fid);
// called only by createNew()
virtual ~WAVAudioFileSource();
private:
// redefined virtual functions:
virtual void doGetNextFrame();
virtual Boolean setInputPort(int portIndex);
virtual double getAverageLevel() const;
private:
FILE* fFid;
double fPlayTimePerSample; // useconds
unsigned fPreferredFrameSize;
unsigned fLastPlayTime; // useconds
unsigned fWAVHeaderSize;
unsigned fFileSize;
int fScaleFactor;
};
#endif
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