OggVorbisAudioStream.hxx

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/*
 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#if USE_OGGVORBIS != 1
#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
#endif

#ifndef __OGGVORBISAUDIOSTREAM__
#define __OGGVORBISAUDIOSTREAM__

#include <string>
#include <vorbis/vorbisfile.h>
#include <vorbis/vorbisenc.h>
#include <deque>
#include <vector>
#include "AudioCodecs_Stream.hxx"
#include "DataTypes.hxx"

namespace CLAM
{

namespace AudioCodecs
{
        class OggVorbisAudioStream : public Stream
        {

        public:
                OggVorbisAudioStream( const AudioFile& file );
                ~OggVorbisAudioStream();

                void PrepareReading();
                void PrepareWriting();
                void Dispose();
                void SeekTo(unsigned long framePosition);

        protected:
                void DiskToMemoryTransfer();
                void MemoryToDiskTransfer();

        private:
                void VorbisI_EncoderSetup();
                void WriteBitstreamHeader();

                void DoVorbisAnalysis();
                void PushAnalysisBlocksOntoOggStream();
                void ConsumeDecodedSamples();
                
        protected:
                std::string      mName;
                FILE*            mFileHandle;
                OggVorbis_File   mNativeFileParams;
                int              mCurrentSection;
                bool             mValidFileParams;

                // Structs needed for Vorbis encoding
                vorbis_info        mStreamInfo;
                vorbis_comment     mFileComments;

                ogg_stream_state   mOggStreamState; // os
                ogg_page           mOggPage;        // og
                ogg_packet         mOggPacket;      // op
                vorbis_dsp_state   mDSPState;       // vd
                vorbis_block       mVorbisBlock;    // vb
                
                int                mEncodedSampleRate;
                bool               mEncoding;

                static const unsigned     mMaxBlockSize;
                static const unsigned     mAnalysisWindowSize;
                std::vector<TInt16>       mBlockBuffer;
                std::vector<std::deque<TData> >       mEncodeBuffer;
                std::deque<TInt16>      mDecodeBuffer;
                
                TSize                   mLastBytesRead;
        };
}

}

#endif // OggVorbisAudioStream.hxx