Cadence/c++/carla-bridge/carla_bridge_client.h

/*
 * Carla bridge code
 * Copyright (C) 2011-2012 Filipe Coelho <falktx@gmail.com>
 *
 * 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
 * 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.
 *
 * For a full copy of the GNU General Public License see the COPYING file
 */

#ifndef CARLA_BRIDGE_CLIENT_H
#define CARLA_BRIDGE_CLIENT_H

#include "carla_bridge.h"
#include "carla_bridge_osc.h"
#include "carla_bridge_toolkit.h"

#ifdef BUILD_BRIDGE_UI
#include "carla_lib_includes.h"
#endif

#include <cstdio>
#include <cstdint>
#include <cstdlib>
#include <QtCore/QMutex>

//CARLA_BRIDGE_START_NAMESPACE;
namespace CarlaBridge {

class CarlaBridgeClient
{
public:
    CarlaBridgeClient(CarlaBridgeToolkit* const toolkit) :
        m_toolkit(toolkit),
    #ifdef BUILD_BRIDGE_PLUGIN
        m_osc(this, "lv2-plugin-bridge")
  #else
        m_osc(this, "lv2-ui-bridge")
  #endif
    {
#ifdef BUILD_BRIDGE_UI
        m_filename = nullptr;
        m_lib = nullptr;
#endif
    }

    virtual ~CarlaBridgeClient()
    {
#ifdef BUILD_BRIDGE_UI
        if (m_filename)
            free(m_filename);
#endif
    }

    // ---------------------------------------------------------------------

    void oscInit(const char* const url)
    {
        m_osc.init(url);
    }

    void oscClose()
    {
        m_osc.close();
    }

    void oscSendUpdate()
    {
        m_osc.sendOscUpdate();
    }

    const CarlaOscData* getOscServerData()
    {
        return m_osc.getServerData();
    }

    // ---------------------------------------------------------------------

    void quequeMessage(MessageType type, int value1, int value2, double value3)
    {
        const QMutexLocker locker(&m_messages.lock);

        for (unsigned int i=0; i < MAX_BRIDGE_MESSAGES; i++)
        {
            Message* const m = &m_messages.data[i];

            if (m->type == MESSAGE_NULL)
            {
                m->type   = type;
                m->value1 = value1;
                m->value2 = value2;
                m->value3 = value3;
                break;
            }
        }
    }

    bool runMessages()
    {
        const QMutexLocker locker(&m_messages.lock);

        for (unsigned int i=0; i < MAX_BRIDGE_MESSAGES; i++)
        {
            Message* const m = &m_messages.data[i];

            switch (m->type)
            {
            case MESSAGE_NULL:
                return true;

            case MESSAGE_PARAMETER:
                setParameter(m->value1, m->value3);
                break;

            case MESSAGE_PROGRAM:
                setProgram(m->value1);
                break;

            case MESSAGE_MIDI_PROGRAM:
                setMidiProgram(m->value1, m->value2);
                break;

            case MESSAGE_NOTE_ON:
                noteOn(m->value1, m->value2);
                break;

            case MESSAGE_NOTE_OFF:
                noteOff(m->value1);
                break;

            case MESSAGE_SHOW_GUI:
                if (m->value1)
                    m_toolkit->show();
                else
                    m_toolkit->hide();
                break;

            case MESSAGE_RESIZE_GUI:
                m_toolkit->resize(m->value1, m->value2);
                break;

            case MESSAGE_SAVE_NOW:
#ifdef BUILD_BRIDGE_PLUGIN
                saveNow();
#endif
                break;

            case MESSAGE_QUIT:
                m_toolkit->quit();
                return false;
            }

            m->type = MESSAGE_NULL;
        }

        return true;
    }

    // ---------------------------------------------------------------------

#ifdef BUILD_BRIDGE_UI
    // ui initialization
    virtual bool init(const char* const, const char* const) = 0;
    virtual void close() = 0;
#endif

    // processing
    virtual void setParameter(const int32_t rindex, const double value) = 0;
    virtual void setProgram(const uint32_t index) = 0;
    virtual void setMidiProgram(const uint32_t bank, const uint32_t program) = 0;
    virtual void noteOn(const uint8_t note, const uint8_t velocity) = 0;
    virtual void noteOff(const uint8_t note) = 0;

#ifdef BUILD_BRIDGE_PLUGIN
    // plugin
    virtual void saveNow() = 0;
    virtual void setCustomData(const char* const type, const char* const key, const char* const value) = 0;
    virtual void setChunkData(const char* const filePath) = 0;
#else
    // gui
    virtual void* getWidget() const = 0;
    virtual bool isResizable() const = 0;
    virtual bool needsReparent() const = 0;
#endif

    // ---------------------------------------------------------------------

#ifdef BUILD_BRIDGE_UI
protected:
    bool libOpen(const char* const filename)
    {
        m_lib = ::lib_open(filename);
        m_filename = strdup(filename);
        return bool(m_lib);
    }

    bool libClose()
    {
        if (m_lib)
            return ::lib_close(m_lib);
        return false;
    }

    void* libSymbol(const char* const symbol)
    {
        if (m_lib)
            return ::lib_symbol(m_lib, symbol);
        return nullptr;
    }

    const char* libError()
    {
        return ::lib_error(m_filename ? m_filename : "");
    }
#endif

    // ---------------------------------------------------------------------

private:
    CarlaBridgeToolkit* const m_toolkit;
    CarlaBridgeOsc m_osc;

    struct {
        Message data[MAX_BRIDGE_MESSAGES];
        QMutex lock;
    } m_messages;

#ifdef BUILD_BRIDGE_UI
    char* m_filename;
    void* m_lib;
#endif
};

CARLA_BRIDGE_END_NAMESPACE

#endif // CARLA_BRIDGE_CLIENT_H