PortMIDIDevice.cxx

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/*
 * Copyright (c) 2001-2004 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
 *
 */
#ifndef __PortMIDIDevice__
#define __PortMIDIDevice__

#include "MIDIManager.hxx"
#include <portmidi.h>
#include <porttime.h>
#include <iostream>

namespace CLAM {

        std::ostream& operator<<( std::ostream& out_str, const PmDeviceInfo* dev_info )
        {
        
                out_str << "Device Name: " << dev_info->name << std::endl;
                out_str << "Interface Name: " << dev_info->interf << std::endl;
                if ( dev_info->output == 1 ) out_str << "Output device" << std::endl ;
                else                                             out_str << "Input device" << std::endl ;

                return out_str;
        }

        class PortMIDIDevice: public MIDIDevice
        {
        private:
                std::string mDevice;   
                PmStream *mHandleIn;  
                PmStream *mHandleOut;
        public:
                PortMIDIDevice(const std::string& name,const std::string& device);

                ~PortMIDIDevice();

                void ConcreteStart(void) throw(Err);
                void ConcreteStop(void) throw(Err);
                void Read(void) throw(Err);
                void Write(unsigned char* msg,int size) throw(Err);
                void OpenInput(int dev) throw(Err);
                void OpenOutput(int dev) throw(Err);
        };


        PortMIDIDevice::PortMIDIDevice(const std::string& name,const std::string& device):
                        MIDIDevice(name)
        {
                mDevice = device;
                mHandleIn = NULL;  
                mHandleOut = NULL;
        }

        void PortMIDIDevice::OpenInput(int dev) throw(Err)
        {
                PmError err = Pm_OpenInput( &mHandleIn,  
                                                                        dev,                       
                                                                        NULL,                      
                                                                        100,                       
                                                                        NULL,
                                                                        0 );

                if (err)
                {
                        std::string str("Could not open PortMIDIDevice ");
                        str += mDevice;
                        throw Err(str.c_str());
                }
        }

        void PortMIDIDevice::OpenOutput(int dev) throw(Err)
        {
                PmError err = Pm_OpenOutput(&mHandleOut,
                                                                        dev,
                                                                        NULL,
                                                                        0,
                                                                        NULL,
                                                                        NULL,
                                                                        0);
                if (err)
                {
                        std::string str("Could not open PortMIDIDevice ");
                        str += mDevice;
                        throw Err(str.c_str());
                }
        }

        void PortMIDIDevice::ConcreteStart(void) throw(Err)
        {
                int dev;
                
                if (mDevice == "default")
                {
                        if (mInputs.size())
                        {
                                OpenInput(Pm_GetDefaultInputDeviceID());
                        }
                        if (mOutputs.size())
                        {
                                OpenOutput(Pm_GetDefaultOutputDeviceID());
                        }
                        return;
                }

                std::string type = mDevice.substr(0,mDevice.find(":",0));
    std::string name = mDevice.substr(mDevice.find(":",0)+1,mDevice.size());

                if (mInputs.size())
                {
                        if (type == "input")
                        {
                                for ( dev = 0; dev < Pm_CountDevices(); dev++) 
                                {
                                        const PmDeviceInfo *info = Pm_GetDeviceInfo(dev);
                                        if (info->input && name == info->name)
                                        {
                                                OpenInput(dev);
                                                return;
                                        }
                                }
                        }
                        std::string str("Could not find PortMIDIDevice ");
                        str += mDevice;
                        throw Err(str.c_str());
                }

                if (mOutputs.size())
                {
                        if (type == "output")
                        {
                                for ( dev = 0; dev < Pm_CountDevices(); dev++) 
                                {
                                        const PmDeviceInfo *info = Pm_GetDeviceInfo(dev);
                                        if (info->output && name == info->name)
                                        {
                                                OpenOutput(dev);
                                                return;
                                        }
                                }
                        }
                        std::string str("Could not find PortMIDIDevice ");
                        str += mDevice;
                        throw Err(str.c_str());
                }
        }

        void PortMIDIDevice::ConcreteStop(void) throw(Err)
        {

                if ( mHandleIn )
                {
                        Pm_Close(mHandleIn);
                        mHandleIn = 0 ;
                }

                if ( mHandleOut )
                {
                        Pm_Close(mHandleOut);
                        mHandleOut = 0 ;
                }

        }

        void PortMIDIDevice::Write(unsigned char* msg,int size) throw(Err)
        {
                int m = msg[0]&0xff;

                if(m == 0xf0) // SysEx
                {
#ifdef WIN32
                        Pm_WriteSysEx(mHandleOut,0,(char*) msg);
#else
                        Pm_WriteSysEx(mHandleOut,0,msg);
#endif

                }
                else
                {
                        if(size == 3)
                        {
                                Pm_WriteShort(mHandleOut,0,Pm_Message(msg[0],msg[1],msg[2]));
                        }
                        else
                        {
                                Pm_WriteShort(mHandleOut,0,Pm_Message(msg[0],msg[1],0));
                        }
                }
        }

        void PortMIDIDevice::Read(void) throw(Err)
        {
                PmEvent buffer; 
                unsigned char status, data1, data2;

            while (Pm_Poll(mHandleIn) == TRUE) 
                {
                        if (Pm_Read(mHandleIn, &buffer, 1) == pmBufferOverflow) continue;
                        status = ( unsigned char ) Pm_MessageStatus(buffer.message);

                        if ( GetMessageLength( status ) == 3 )
                        {
                                data1 = ( unsigned char ) Pm_MessageData1(buffer.message);
                                data2 = ( unsigned char ) Pm_MessageData2(buffer.message);
                                
                                HandleRawByte(status);
                                HandleRawByte(data1);
                                HandleRawByte(data2);
                        }
                        else
                        {
                                data1 = ( unsigned char ) Pm_MessageData1(buffer.message);

                                HandleRawByte(status);
                                HandleRawByte(data1);
                        }

                }

        }

        PortMIDIDevice::~PortMIDIDevice()
        {
                Stop();
        }

        class PortMIDIDeviceList: public MIDIDeviceList
        {
                static PortMIDIDeviceList sDevices;

                PortMIDIDeviceList()
                        :MIDIDeviceList(std::string("portmidi"))
                {
                        //char name[64];
                        int dev = 0 ;

                        Pm_Initialize() ;

                        for ( dev = 0; dev < Pm_CountDevices(); dev++) 
                        {
                                const PmDeviceInfo *info = Pm_GetDeviceInfo(dev);

                                std::string name(info->name);

                                if (info->input)
                                        mAvailableDevices.push_back(std::string("input:")+name);

                                if (info->output)
                                        mAvailableDevices.push_back(std::string("output:")+name);
                        }

                        AddMe();
                }

public:
                ~PortMIDIDeviceList()
                {
                        Pm_Terminate() ;
                }

                std::string DefaultDevice(void)
                {
                        return std::string("default");
                }

                MIDIDevice* Create(
                        const std::string& name,const std::string& device)
                {
                        return new PortMIDIDevice(name,device);
                }
        };

        PortMIDIDeviceList PortMIDIDeviceList::sDevices;


}

#endif