RageSoundReader_Resample_Good.h

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#ifndef RAGE_SOUND_READER_RESAMPLE_GOOD
#define RAGE_SOUND_READER_RESAMPLE_GOOD

#include "RageSoundReader.h"
#include "RageSoundReader_Resample.h"

/* This class changes the sampling rate of a sound. */
class RageSoundReader_Resample_Good: public RageSoundReader_Resample
{
public:
        /* We own source. */
        void Open(SoundReader *source);
        int GetLength() const;
        int GetLength_Fast() const;
        int SetPosition_Accurate(int ms);
        int SetPosition_Fast(int ms);
        int Read(char *buf, unsigned len);
        RageSoundReader_Resample_Good();
        virtual ~RageSoundReader_Resample_Good();
        SoundReader *Copy() const;

        /* Change the actual sample rate of a sound. */
        void SetSampleRate( int hz );
        void SetHighQuality( bool hq ) { HighQuality = hq; }

        int GetSampleRate() const { return samplerate; }
        unsigned GetNumChannels() const { return source->GetNumChannels(); }
        bool IsStreamingFromDisk() const { return source->IsStreamingFromDisk(); }

        enum { BUFSIZE = 4096 };

private:
        SoundReader *source;
        bool HighQuality;
        int samplerate;

        void *empty_resamp;
        struct resample_channel
        {
                resample_channel(): resamp(NULL) { }
                void *resamp;
                float inbuf[BUFSIZE];
        };
        vector<resample_channel> resamplers; /* one per channel */
        int BufSamples;
        bool eof;

        void Reset();
        void ReopenResampler();
        float GetFactor() const;
        bool FillBuf();
};

#endif

/*
 * Copyright (c) 2003 Glenn Maynard
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

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