| /********** |
| 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 3 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., |
| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| **********/ |
| // "liveMedia" |
| // Copyright (c) 1996-2020 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 |
| |
| typedef enum { |
| WA_PCM = 0x01, |
| WA_PCMA = 0x06, |
| WA_PCMU = 0x07, |
| WA_IMA_ADPCM = 0x11, |
| WA_UNKNOWN |
| } WAV_AUDIO_FORMAT; |
| |
| |
| class WAVAudioFileSource: public AudioInputDevice { |
| public: |
| |
| static WAVAudioFileSource* createNew(UsageEnvironment& env, |
| char const* fileName); |
| |
| unsigned numPCMBytes() const; |
| void setScaleFactor(int scale); |
| void seekToPCMByte(unsigned byteNumber); |
| void limitNumBytesToStream(unsigned numBytesToStream); |
| // if "numBytesToStream" is >0, then we limit the stream to that number of bytes, before treating it as EOF |
| |
| unsigned char getAudioFormat(); |
| |
| protected: |
| WAVAudioFileSource(UsageEnvironment& env, FILE* fid); |
| // called only by createNew() |
| |
| virtual ~WAVAudioFileSource(); |
| |
| static void fileReadableHandler(WAVAudioFileSource* source, int mask); |
| void doReadFromFile(); |
| |
| private: |
| // redefined virtual functions: |
| virtual void doGetNextFrame(); |
| virtual void doStopGettingFrames(); |
| virtual Boolean setInputPort(int portIndex); |
| virtual double getAverageLevel() const; |
| |
| protected: |
| unsigned fPreferredFrameSize; |
| |
| private: |
| FILE* fFid; |
| double fPlayTimePerSample; // useconds |
| Boolean fFidIsSeekable; |
| unsigned fLastPlayTime; // useconds |
| Boolean fHaveStartedReading; |
| unsigned fWAVHeaderSize; |
| unsigned fFileSize; |
| int fScaleFactor; |
| Boolean fLimitNumBytesToStream; |
| unsigned fNumBytesToStream; // used iff "fLimitNumBytesToStream" is True |
| unsigned char fAudioFormat; |
| }; |
| |
| #endif |