OggVorbisAudioStream.hxx

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00001 /*
00002  * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
00003  *                         UNIVERSITAT POMPEU FABRA
00004  *
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00019  *
00020  */
00021 
00022 #if USE_OGGVORBIS != 1
00023 #error USE_OGGVORBIS was not set to 1 in your settings.cfg file, but you are including files that require this. Please fix your settings.cfg
00024 #endif
00025 
00026 #ifndef __OGGVORBISAUDIOSTREAM__
00027 #define __OGGVORBISAUDIOSTREAM__
00028 
00029 #include <string>
00030 #include <vorbis/vorbisfile.h>
00031 #include <vorbis/vorbisenc.h>
00032 #include <deque>
00033 #include <vector>
00034 #include "AudioCodecs_Stream.hxx"
00035 #include "DataTypes.hxx"
00036 #include "Array.hxx"
00037 
00038 namespace CLAM
00039 {
00040 
00041 namespace AudioCodecs
00042 {
00043         class OggVorbisAudioStream : public Stream
00044         {
00045 
00046         public:
00047                 OggVorbisAudioStream();
00048                 OggVorbisAudioStream( const AudioFile& file );
00049 
00050                 ~OggVorbisAudioStream();
00051 
00052                 void SetFOI( const AudioFile& file );
00053 
00054                 void PrepareReading();
00055                 void PrepareWriting();
00056                 void PrepareReadWrite();
00057                 void Dispose();
00058 
00059         protected:
00060                 void AudioFileToNative( const AudioFile& file );
00061                 void DiskToMemoryTransfer();
00062                 void MemoryToDiskTransfer();
00063 
00064                 void VorbisI_EncoderSetup();
00065                 void WriteBitstreamHeader();
00066 
00067                 void DoVorbisAnalysis();
00068                 void PushAnalysisBlocksOntoOggStream();
00069                 void ConsumeDecodedSamples();
00070                 
00071         protected:
00072                 std::string      mName;
00073                 FILE*            mFileHandle;
00074                 OggVorbis_File   mNativeFileParams;
00075                 int              mCurrentSection;
00076                 bool             mValidFileParams;
00077 
00078                 // Structs needed for Vorbis encoding
00079                 vorbis_info        mStreamInfo;
00080                 vorbis_comment     mFileComments;
00081 
00082                 ogg_stream_state   mOggStreamState; // os
00083                 ogg_page           mOggPage;        // og
00084                 ogg_packet         mOggPacket;      // op
00085                 vorbis_dsp_state   mDSPState;       // vd
00086                 vorbis_block       mVorbisBlock;    // vb
00087                 
00088                 int                mEncodedSampleRate;
00089                 int                mEncodedChannels;
00090                 bool               mEncoding;
00091                 int                mOffset;
00092 
00093                 static const TSize      mMaxBlockSize;
00094                 static const TSize      mAnalysisWindowSize;
00095                 Array<TInt16>           mBlockBuffer;
00096                 std::vector<std::deque<TData> >       mEncodeBuffer;
00097                 std::deque<TInt16>      mDecodeBuffer;
00098                 
00099                 TSize                   mLastBytesRead;
00100         };
00101 }
00102 
00103 }
00104 
00105 #endif // OggVorbisAudioStream.hxx
00106 

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