/*
    JackEngine.h

    Copyright 2009, Alan Calvert

    This file is part of yoshimi, which 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 3 of the License, or (at your option) any later version.

    yoshimi 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 yoshimi.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef JACK_ENGINE_H
#define JACK_ENGINE_H

#include <string>
#include <pthread.h>
#include <semaphore.h>
#include <jack/jack.h>
#include <pthread.h>

#include "MidiIn.h"
#include "AudioOut.h"

typedef jack_default_audio_sample_t jsample_t;

class JackEngine:public AudioOut, MidiIn
{
    public:
        JackEngine();
        ~JackEngine() { }

        bool Start();
        void Stop();

        void setMidiEn(bool nval);
        bool getMidiEn() const;

        void setAudioEn(bool nval);
        bool getAudioEn() const;

        int getBuffersize() { return audio.jackNframes; }

        std::string clientName();
        int clientId();

    protected:

        int processCallback(jack_nframes_t nframes);
        static int _processCallback(jack_nframes_t nframes, void *arg);
        int bufferSizeCallback(jack_nframes_t nframes);
        static int _bufferSizeCallback(jack_nframes_t nframes, void *arg);
        static void _errorCallback(const char *msg);
        static void _infoCallback(const char *msg);
        static int _xrunCallback(void *arg);

    private:
        bool connectServer(std::string server);
        bool connectJack();
        void disconnectJack();
        bool openAudio();
        void stopAudio();
        bool processAudio(jack_nframes_t nframes);
        bool openMidi();
        void stopMidi();

        jack_client_t *jackClient;
        struct audio {
            unsigned int jackSamplerate;
            unsigned int jackNframes;
            jack_port_t *ports[2];
            jsample_t   *portBuffs[2];
        } audio;
        struct midi {
            jack_port_t *inport;
        } midi;

        void handleMidi(unsigned long frames);
};

#endif
