/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 3 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2017 Live Networks, Inc. All rights reserved.
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// A WAV audio file source
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// NOTE: Samples are returned in little-endian order (the same order in which
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// they were stored in the file).
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// C++ header
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#ifndef _WAV_AUDIO_FILE_SOURCE_HH
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#define _WAV_AUDIO_FILE_SOURCE_HH
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#ifndef _AUDIO_INPUT_DEVICE_HH
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#include "AudioInputDevice.hh"
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#endif
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typedef enum {
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WA_PCM = 0x01,
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WA_PCMA = 0x06,
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WA_PCMU = 0x07,
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WA_IMA_ADPCM = 0x11,
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WA_UNKNOWN
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} WAV_AUDIO_FORMAT;
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class WAVAudioFileSource: public AudioInputDevice {
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public:
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static WAVAudioFileSource* createNew(UsageEnvironment& env,
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char const* fileName);
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unsigned numPCMBytes() const;
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void setScaleFactor(int scale);
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void seekToPCMByte(unsigned byteNumber);
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void limitNumBytesToStream(unsigned numBytesToStream);
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// if "numBytesToStream" is >0, then we limit the stream to that number of bytes, before treating it as EOF
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unsigned char getAudioFormat();
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protected:
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WAVAudioFileSource(UsageEnvironment& env, FILE* fid);
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// called only by createNew()
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virtual ~WAVAudioFileSource();
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static void fileReadableHandler(WAVAudioFileSource* source, int mask);
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void doReadFromFile();
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private:
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// redefined virtual functions:
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virtual void doGetNextFrame();
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virtual void doStopGettingFrames();
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virtual Boolean setInputPort(int portIndex);
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virtual double getAverageLevel() const;
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protected:
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unsigned fPreferredFrameSize;
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private:
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FILE* fFid;
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double fPlayTimePerSample; // useconds
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Boolean fFidIsSeekable;
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unsigned fLastPlayTime; // useconds
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Boolean fHaveStartedReading;
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unsigned fWAVHeaderSize;
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unsigned fFileSize;
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int fScaleFactor;
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Boolean fLimitNumBytesToStream;
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unsigned fNumBytesToStream; // used iff "fLimitNumBytesToStream" is True
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unsigned char fAudioFormat;
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};
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#endif
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