jack2/common/JackAudioAdapterInterface.h

/*
Copyright (C) 2008 Grame

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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __JackAudioAdapterInterface__
#define __JackAudioAdapterInterface__

#include "ringbuffer.h"
#include "jack.h"
#include "JackError.h"
#include "JackResampler.h"
#include "JackFilters.h"
#include <samplerate.h>


namespace Jack
{

#define TABLE_MAX 100000

struct Measure 
{
    int delta;
    int time1;
    int time2;
    float r1;
    float r2;
    int pos1;
    int pos2;
};

struct MeasureTable 
{

    Measure fTable[TABLE_MAX];
    int fCount;

    MeasureTable():fCount(0)
    {}

    void Write(int time1, int time2, float r1, float r2, int pos1, int pos2);
    void Save();

};

/*!
\brief Base class for audio adapters.
*/

class JackAudioAdapterInterface
{

    protected:

    #ifdef DEBUG
        MeasureTable fTable;
    #endif
    
        int fCaptureChannels;
        int fPlaybackChannels;
        
        jack_nframes_t fBufferSize;
        jack_nframes_t fSampleRate;
         
        // DLL
        JackAtomicDelayLockedLoop fProducerDLL;
        JackAtomicDelayLockedLoop fConsumerDLL;
         
        JackResampler** fCaptureRingBuffer;
        JackResampler** fPlaybackRingBuffer;

        bool fRunning;
           
    public:
    
        JackAudioAdapterInterface(jack_nframes_t buffer_size, jack_nframes_t sample_rate)
            :fBufferSize(buffer_size), 
            fSampleRate(sample_rate),
            fProducerDLL(buffer_size, sample_rate),
            fConsumerDLL(buffer_size, sample_rate),
            fRunning(false)
        {}
        virtual ~JackAudioAdapterInterface()
        {}
        
        void SetRingBuffers(JackResampler** input, JackResampler** output)
        {
            fCaptureRingBuffer = input;
            fPlaybackRingBuffer = output;
        }
         
        bool IsRunning() {return fRunning;}
        
        virtual void Reset() {fRunning = false;}
        void ResetRingBuffers();
        
        virtual int Open();
        virtual int Close();
        
        virtual int SetBufferSize(jack_nframes_t buffer_size)
        {
            fBufferSize = buffer_size;
            fConsumerDLL.Init(fBufferSize, fSampleRate);
            fProducerDLL.Init(fBufferSize, fSampleRate);
            return 0;
        }
        
        virtual int SetSampleRate(jack_nframes_t sample_rate)
        {
            fSampleRate = sample_rate;
            fConsumerDLL.Init(fBufferSize, fSampleRate);
            // Producer (Audio) keeps the same SR
            return 0;
        }
        
         virtual int SetAudioSampleRate(jack_nframes_t sample_rate)
        {
            fSampleRate = sample_rate;
            // Consumer keeps the same SR
            fProducerDLL.Init(fBufferSize, fSampleRate);
            return 0;
        }
  
        virtual void SetCallbackTime(jack_time_t callback_usec)
        {
            fConsumerDLL.IncFrame(callback_usec);
        }
        
        void ResampleFactor(jack_nframes_t& frame1, jack_nframes_t& frame2);
        
        int GetInputs()
        {
            return fCaptureChannels;
        }  
        
        int GetOutputs()
        {
            return fPlaybackChannels;
        }   
    
};

}

#endif