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| | | /********** |
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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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| | | |
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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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| | | |
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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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| | | |
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| | | #ifndef _WAV_AUDIO_FILE_SOURCE_HH |
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| | | #define _WAV_AUDIO_FILE_SOURCE_HH |
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| | | |
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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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| | | |
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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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| | | |
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| | | |
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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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| | | |
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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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| | | |
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| | | unsigned char getAudioFormat(); |
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| | | |
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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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| | | |
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| | | virtual ~WAVAudioFileSource(); |
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| | | |
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| | | static void fileReadableHandler(WAVAudioFileSource* source, int mask); |
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| | | void doReadFromFile(); |
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| | | |
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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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| | | |
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| | | protected: |
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| | | unsigned fPreferredFrameSize; |
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| | | |
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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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| | | |
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| | | #endif |
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