drivers/midi/MidiInputDeviceAlsa.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2008 Christian Schoenebeck                       *
 *                                                                         *
 *   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                                                   *
 ***************************************************************************/

#include "MidiInputDeviceAlsa.h"
#include "MidiInputDeviceFactory.h"

#define perm_ok(pinfo,bits) ((snd_seq_port_info_get_capability(pinfo) & (bits)) == (bits))

namespace LinuxSampler {

// *************** ParameterName ***************
// *

    MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterName::ParameterName(MidiInputPort* pPort) throw (Exception) : MidiInputPort::ParameterName(pPort, "Port " + ToString(pPort->GetPortNumber())) {
        OnSetValue(ValueAsString()); // initialize port name
    }

    void MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterName::OnSetValue(String s) throw (Exception) {
        if (s.size() > 16) throw Exception("Name too long for ALSA MIDI input port (max. 16 characters)");
        snd_seq_port_info_t* hInfo;
        snd_seq_port_info_malloc(&hInfo);
        snd_seq_get_port_info(((MidiInputDeviceAlsa*)pPort->GetDevice())->hAlsaSeq, pPort->GetPortNumber(), hInfo);
        snd_seq_port_info_set_name(hInfo, s.c_str());
        snd_seq_set_port_info(((MidiInputDeviceAlsa*)pPort->GetDevice())->hAlsaSeq, pPort->GetPortNumber(), hInfo);
        snd_seq_port_info_free(hInfo);
    }


// *************** ParameterAlsaSeqBindings ***************
// *


    MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::ParameterAlsaSeqBindings(MidiInputPortAlsa* pPort) : DeviceRuntimeParameterStrings( std::vector<String>() ) {
        this->pPort = pPort;
    }

    String MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::Description() {
        return "Bindings to other Alsa sequencer clients";
    }
    bool MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::Fix() {
        return false;
    }

    std::vector<String> MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::PossibilitiesAsString() {
        std::vector<String> res;
        snd_seq_client_info_t* cinfo;
        snd_seq_port_info_t* pinfo;

        snd_seq_client_info_alloca(&cinfo);
        snd_seq_port_info_alloca(&pinfo);
        snd_seq_client_info_set_client(cinfo, -1);
        while (snd_seq_query_next_client(pPort->pDevice->hAlsaSeq, cinfo) >= 0) {
            snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
            snd_seq_port_info_set_port(pinfo, -1);
            while (snd_seq_query_next_port(pPort->pDevice->hAlsaSeq, pinfo) >= 0) {
                if (perm_ok(pinfo, SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ)) {
                        String seq_id = ToString(snd_seq_client_info_get_client(cinfo)) + ":" +
                                        ToString(snd_seq_port_info_get_port(pinfo));
                        res.push_back(seq_id);
                }
            }
        }

        return res;
    }

    void MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::OnSetValue(std::vector<String> vS) throw (Exception) {
        std::vector<snd_seq_port_subscribe_t*>::iterator it = pPort->subscriptions.begin();
        for (; it != pPort->subscriptions.end(); it++) {
            if(snd_seq_unsubscribe_port(pPort->pDevice->hAlsaSeq, *it)) {
                dmsg(1,("ParameterAlsaSeqBindings::OnSetValue: Can't unsubscribe port connection!.\n"));
            }
            snd_seq_port_subscribe_free(*it);
        }
        pPort->subscriptions.clear();

        std::vector<String>::iterator iter = vS.begin();
        for (; iter != vS.end(); iter++) pPort->ConnectToAlsaMidiSource((*iter).c_str());
    }


// *************** ParameterAlsaSeqId ***************
// *

    MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::ParameterAlsaSeqId(MidiInputPortAlsa* pPort)
        : DeviceRuntimeParameterString(ToString(pPort->pDevice->hAlsaSeqClient) + ":" + ToString(pPort->portNumber)) {
    }

    String MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::Description() {
        return "ALSA Sequencer ID";
    }

    bool MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::Fix() {
        return true;
    }

    std::vector<String> MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::PossibilitiesAsString() {
        return std::vector<String>(); // nothing
    }

    void MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::OnSetValue(String s) {
        // not possible as parameter is 'fix'
    }


// *************** MidiInputPortAlsa ***************
// *

    MidiInputDeviceAlsa::MidiInputPortAlsa::MidiInputPortAlsa(MidiInputDeviceAlsa* pDevice) throw (MidiInputException) : MidiInputPort(pDevice, -1) {
        this->pDevice = pDevice;

        // create Alsa sequencer port
        int alsaPort = snd_seq_create_simple_port(pDevice->hAlsaSeq, "unnamed port",
                                                  SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE,
                                                  SND_SEQ_PORT_TYPE_APPLICATION);
        if (alsaPort < 0) throw MidiInputException("Error creating sequencer port");
        this->portNumber = alsaPort;

        delete Parameters["NAME"];
        Parameters["NAME"]              = new ParameterName(this);
        Parameters["ALSA_SEQ_BINDINGS"] = new ParameterAlsaSeqBindings(this);
        Parameters["ALSA_SEQ_ID"]       = new ParameterAlsaSeqId(this);
    }

    MidiInputDeviceAlsa::MidiInputPortAlsa::~MidiInputPortAlsa() {
            snd_seq_delete_simple_port(pDevice->hAlsaSeq, portNumber);
    }

    /**
     * Connects this Alsa midi input device with an Alsa MIDI source.
     *
     * @param Client - Alsa sequencer client and port ID of a MIDI source
     *                (e.g. "64:0")
     * @throws MidiInputException  if connection cannot be established
     */
    void MidiInputDeviceAlsa::MidiInputPortAlsa::ConnectToAlsaMidiSource(const char* MidiSource) {
        snd_seq_addr_t sender, dest;
        snd_seq_port_subscribe_t* subs;
        int hExtClient, hExtPort;

        sscanf(MidiSource, "%d:%d", &hExtClient, &hExtPort);
        sender.client = (char) hExtClient;
        sender.port   = (char) hExtPort;
        dest.client   = (char) pDevice->hAlsaSeqClient;
        dest.port     = (char) portNumber;
        snd_seq_port_subscribe_malloc(&subs);
        snd_seq_port_subscribe_set_sender(subs, &sender);
        snd_seq_port_subscribe_set_dest(subs, &dest);
        snd_seq_port_subscribe_set_queue(subs, 1);
        snd_seq_port_subscribe_set_time_update(subs, 1);
        snd_seq_port_subscribe_set_time_real(subs, 1);
        if (snd_seq_subscribe_port(pDevice->hAlsaSeq, subs) < 0) {
            snd_seq_port_subscribe_free(subs);
            throw MidiInputException(String("Unable to connect to Alsa seq client \'") + MidiSource + "\' (" + snd_strerror(errno) + ")");
        }

        subscriptions.push_back(subs);
    }


// *************** MidiInputDeviceAlsa ***************
// *

    MidiInputDeviceAlsa::MidiInputDeviceAlsa(std::map<String,DeviceCreationParameter*> Parameters, void* pSampler) : MidiInputDevice(Parameters, pSampler), Thread(true, true, 1, -1) {
        if (snd_seq_open(&hAlsaSeq, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
            throw MidiInputException("Error opening ALSA sequencer");
        }
        this->hAlsaSeqClient = snd_seq_client_id(hAlsaSeq);
        snd_seq_set_client_name(hAlsaSeq, "LinuxSampler");
        AcquirePorts(((DeviceCreationParameterInt*)Parameters["PORTS"])->ValueAsInt());
        if (((DeviceCreationParameterBool*)Parameters["ACTIVE"])->ValueAsBool()) {
                Listen();
        }
    }

    MidiInputDeviceAlsa::~MidiInputDeviceAlsa() {
        // free the midi ports (we can't let the base class do this,
        // as the MidiInputPortAlsa destructors need access to
        // hAlsaSeq)
        for (std::map<int,MidiInputPort*>::iterator iter = Ports.begin(); iter != Ports.end() ; iter++) {
            delete static_cast<MidiInputPortAlsa*>(iter->second);
        }
        Ports.clear();

        snd_seq_close(hAlsaSeq);
    }

    MidiInputDeviceAlsa::MidiInputPortAlsa* MidiInputDeviceAlsa::CreateMidiPort() {
        return new MidiInputPortAlsa(this);
    }

    String MidiInputDeviceAlsa::Name() {
            return "ALSA";
    }

    String MidiInputDeviceAlsa::Driver() {
            return Name();
    }

    void MidiInputDeviceAlsa::Listen() {
        StartThread();
    }

    void MidiInputDeviceAlsa::StopListen() {
        StopThread();
    }

    String MidiInputDeviceAlsa::Description() {
            return "Advanced Linux Sound Architecture";
    }

    String MidiInputDeviceAlsa::Version() {
            String s = "$Revision: 1.22 $";
            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
    }

    int MidiInputDeviceAlsa::Main() {
        int npfd;
        struct pollfd* pfd;
        snd_seq_event_t* ev;

        npfd = snd_seq_poll_descriptors_count(hAlsaSeq, POLLIN);
        pfd = (struct pollfd*) alloca(npfd * sizeof(struct pollfd));
        snd_seq_poll_descriptors(hAlsaSeq, pfd, npfd, POLLIN);
        while (true) {
            if (poll(pfd, npfd, 100000) > 0) {
                do {
                    snd_seq_event_input(hAlsaSeq, &ev);
                    int port = (int) ev->dest.port;
                    MidiInputPort* pMidiInputPort = Ports[port];

                    switch (ev->type) {
                        case SND_SEQ_EVENT_CONTROLLER:
                            if (ev->data.control.param == 0)
                                pMidiInputPort->DispatchBankSelectMsb(ev->data.control.value, ev->data.control.channel);
                            else if (ev->data.control.param == 32)
                                pMidiInputPort->DispatchBankSelectLsb(ev->data.control.value, ev->data.control.channel);
                            pMidiInputPort->DispatchControlChange(ev->data.control.param, ev->data.control.value, ev->data.control.channel);
                            break;

                        case SND_SEQ_EVENT_CHANPRESS:
                            pMidiInputPort->DispatchControlChange(128, ev->data.control.value, ev->data.control.channel);
                            break;

                        case SND_SEQ_EVENT_PITCHBEND:
                            pMidiInputPort->DispatchPitchbend(ev->data.control.value, ev->data.control.channel);
                            break;

                        case SND_SEQ_EVENT_NOTEON:
                            if (ev->data.note.velocity != 0) {
                                pMidiInputPort->DispatchNoteOn(ev->data.note.note, ev->data.note.velocity, ev->data.control.channel);
                            }
                            else {
                                pMidiInputPort->DispatchNoteOff(ev->data.note.note, 0, ev->data.control.channel);
                            }
                            break;

                        case SND_SEQ_EVENT_NOTEOFF:
                            pMidiInputPort->DispatchNoteOff(ev->data.note.note, ev->data.note.velocity, ev->data.control.channel);
                            break;

                        case SND_SEQ_EVENT_SYSEX:
                            pMidiInputPort->DispatchSysex(ev->data.ext.ptr, ev->data.ext.len);
                            break;

                        case SND_SEQ_EVENT_PGMCHANGE:
                            pMidiInputPort->DispatchProgramChange(ev->data.control.value, ev->data.control.channel);
                            break;
                    }
                    snd_seq_free_event(ev);
                } while (snd_seq_event_input_pending(hAlsaSeq, 0) > 0);
            }
        }
        // just to avoid a compiler warning
        return EXIT_FAILURE;
    }

} // namespace LinuxSampler
1	schoenebeck	201	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	1715	* Copyright (C) 2005 - 2008 Christian Schoenebeck *
7	schoenebeck	201	* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24			#include "MidiInputDeviceAlsa.h"
25			#include "MidiInputDeviceFactory.h"
26
27	schoenebeck	226	#define perm_ok(pinfo,bits) ((snd_seq_port_info_get_capability(pinfo) & (bits)) == (bits))
28
29	schoenebeck	201	namespace LinuxSampler {
30
31	schoenebeck	221	// ************* ParameterName *************
32			// *
33
34	schoenebeck	880	MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterName::ParameterName(MidiInputPort* pPort) throw (Exception) : MidiInputPort::ParameterName(pPort, "Port " + ToString(pPort->GetPortNumber())) {
35	schoenebeck	221	OnSetValue(ValueAsString()); // initialize port name
36	schoenebeck	201	}
37
38	schoenebeck	880	void MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterName::OnSetValue(String s) throw (Exception) {
39			if (s.size() > 16) throw Exception("Name too long for ALSA MIDI input port (max. 16 characters)");
40	schoenebeck	221	snd_seq_port_info_t* hInfo;
41			snd_seq_port_info_malloc(&hInfo);
42			snd_seq_get_port_info(((MidiInputDeviceAlsa*)pPort->GetDevice())->hAlsaSeq, pPort->GetPortNumber(), hInfo);
43			snd_seq_port_info_set_name(hInfo, s.c_str());
44			snd_seq_set_port_info(((MidiInputDeviceAlsa*)pPort->GetDevice())->hAlsaSeq, pPort->GetPortNumber(), hInfo);
45			snd_seq_port_info_free(hInfo);
46	schoenebeck	201	}
47
48	schoenebeck	221
49
50			// ************* ParameterAlsaSeqBindings *************
51			// *
52
53
54			MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::ParameterAlsaSeqBindings(MidiInputPortAlsa* pPort) : DeviceRuntimeParameterStrings( std::vector<String>() ) {
55			this->pPort = pPort;
56	schoenebeck	201	}
57
58	schoenebeck	221	String MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::Description() {
59			return "Bindings to other Alsa sequencer clients";
60	schoenebeck	201	}
61	schoenebeck	221	bool MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::Fix() {
62			return false;
63			}
64	schoenebeck	201
65	schoenebeck	221	std::vector<String> MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::PossibilitiesAsString() {
66	schoenebeck	226	std::vector<String> res;
67			snd_seq_client_info_t* cinfo;
68			snd_seq_port_info_t* pinfo;
69
70			snd_seq_client_info_alloca(&cinfo);
71			snd_seq_port_info_alloca(&pinfo);
72			snd_seq_client_info_set_client(cinfo, -1);
73			while (snd_seq_query_next_client(pPort->pDevice->hAlsaSeq, cinfo) >= 0) {
74			snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
75			snd_seq_port_info_set_port(pinfo, -1);
76			while (snd_seq_query_next_port(pPort->pDevice->hAlsaSeq, pinfo) >= 0) {
77			if (perm_ok(pinfo, SND_SEQ_PORT_CAP_READ\|SND_SEQ_PORT_CAP_SUBS_READ)) {
78			String seq_id = ToString(snd_seq_client_info_get_client(cinfo)) + ":" +
79			ToString(snd_seq_port_info_get_port(pinfo));
80			res.push_back(seq_id);
81			}
82			}
83			}
84
85			return res;
86	schoenebeck	201	}
87
88	schoenebeck	880	void MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqBindings::OnSetValue(std::vector<String> vS) throw (Exception) {
89	iliev	1296	std::vector<snd_seq_port_subscribe_t*>::iterator it = pPort->subscriptions.begin();
90			for (; it != pPort->subscriptions.end(); it++) {
91			if(snd_seq_unsubscribe_port(pPort->pDevice->hAlsaSeq, *it)) {
92			dmsg(1,("ParameterAlsaSeqBindings::OnSetValue: Can't unsubscribe port connection!.\n"));
93			}
94			snd_seq_port_subscribe_free(*it);
95			}
96			pPort->subscriptions.clear();
97	schoenebeck	1344
98	schoenebeck	221	std::vector<String>::iterator iter = vS.begin();
99			for (; iter != vS.end(); iter++) pPort->ConnectToAlsaMidiSource((*iter).c_str());
100	schoenebeck	201	}
101
102	schoenebeck	221
103
104	schoenebeck	476	// ************* ParameterAlsaSeqId *************
105			// *
106
107			MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::ParameterAlsaSeqId(MidiInputPortAlsa* pPort)
108			: DeviceRuntimeParameterString(ToString(pPort->pDevice->hAlsaSeqClient) + ":" + ToString(pPort->portNumber)) {
109			}
110
111			String MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::Description() {
112			return "ALSA Sequencer ID";
113			}
114
115			bool MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::Fix() {
116			return true;
117			}
118
119			std::vector<String> MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::PossibilitiesAsString() {
120			return std::vector<String>(); // nothing
121			}
122
123			void MidiInputDeviceAlsa::MidiInputPortAlsa::ParameterAlsaSeqId::OnSetValue(String s) {
124			// not possible as parameter is 'fix'
125			}
126
127
128
129	schoenebeck	221	// ************* MidiInputPortAlsa *************
130			// *
131
132			MidiInputDeviceAlsa::MidiInputPortAlsa::MidiInputPortAlsa(MidiInputDeviceAlsa* pDevice) throw (MidiInputException) : MidiInputPort(pDevice, -1) {
133			this->pDevice = pDevice;
134
135			// create Alsa sequencer port
136			int alsaPort = snd_seq_create_simple_port(pDevice->hAlsaSeq, "unnamed port",
137			SND_SEQ_PORT_CAP_WRITE\|SND_SEQ_PORT_CAP_SUBS_WRITE,
138			SND_SEQ_PORT_TYPE_APPLICATION);
139			if (alsaPort < 0) throw MidiInputException("Error creating sequencer port");
140			this->portNumber = alsaPort;
141
142	persson	1248	delete Parameters["NAME"];
143	schoenebeck	221	Parameters["NAME"] = new ParameterName(this);
144			Parameters["ALSA_SEQ_BINDINGS"] = new ParameterAlsaSeqBindings(this);
145	schoenebeck	476	Parameters["ALSA_SEQ_ID"] = new ParameterAlsaSeqId(this);
146	schoenebeck	201	}
147
148	schoenebeck	221	MidiInputDeviceAlsa::MidiInputPortAlsa::~MidiInputPortAlsa() {
149			snd_seq_delete_simple_port(pDevice->hAlsaSeq, portNumber);
150	schoenebeck	201	}
151
152			/**
153	schoenebeck	221	* Connects this Alsa midi input device with an Alsa MIDI source.
154			*
155			* @param Client - Alsa sequencer client and port ID of a MIDI source
156			* (e.g. "64:0")
157			* @throws MidiInputException if connection cannot be established
158			*/
159	schoenebeck	201	void MidiInputDeviceAlsa::MidiInputPortAlsa::ConnectToAlsaMidiSource(const char* MidiSource) {
160			snd_seq_addr_t sender, dest;
161			snd_seq_port_subscribe_t* subs;
162			int hExtClient, hExtPort;
163
164			sscanf(MidiSource, "%d:%d", &hExtClient, &hExtPort);
165			sender.client = (char) hExtClient;
166			sender.port = (char) hExtPort;
167			dest.client = (char) pDevice->hAlsaSeqClient;
168			dest.port = (char) portNumber;
169	iliev	1296	snd_seq_port_subscribe_malloc(&subs);
170	schoenebeck	201	snd_seq_port_subscribe_set_sender(subs, &sender);
171			snd_seq_port_subscribe_set_dest(subs, &dest);
172			snd_seq_port_subscribe_set_queue(subs, 1);
173			snd_seq_port_subscribe_set_time_update(subs, 1);
174			snd_seq_port_subscribe_set_time_real(subs, 1);
175	iliev	1296	if (snd_seq_subscribe_port(pDevice->hAlsaSeq, subs) < 0) {
176			snd_seq_port_subscribe_free(subs);
177	schoenebeck	201	throw MidiInputException(String("Unable to connect to Alsa seq client \'") + MidiSource + "\' (" + snd_strerror(errno) + ")");
178	iliev	1296	}
179
180			subscriptions.push_back(subs);
181	schoenebeck	201	}
182
183	schoenebeck	221
184
185			// ************* MidiInputDeviceAlsa *************
186			// *
187
188	schoenebeck	551	MidiInputDeviceAlsa::MidiInputDeviceAlsa(std::map<String,DeviceCreationParameter> Parameters, void pSampler) : MidiInputDevice(Parameters, pSampler), Thread(true, true, 1, -1) {
189	schoenebeck	221	if (snd_seq_open(&hAlsaSeq, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
190			throw MidiInputException("Error opening ALSA sequencer");
191			}
192			this->hAlsaSeqClient = snd_seq_client_id(hAlsaSeq);
193			snd_seq_set_client_name(hAlsaSeq, "LinuxSampler");
194			AcquirePorts(((DeviceCreationParameterInt*)Parameters["PORTS"])->ValueAsInt());
195			if (((DeviceCreationParameterBool*)Parameters["ACTIVE"])->ValueAsBool()) {
196			Listen();
197			}
198			}
199
200			MidiInputDeviceAlsa::~MidiInputDeviceAlsa() {
201	persson	1248	// free the midi ports (we can't let the base class do this,
202			// as the MidiInputPortAlsa destructors need access to
203			// hAlsaSeq)
204			for (std::map<int,MidiInputPort*>::iterator iter = Ports.begin(); iter != Ports.end() ; iter++) {
205			delete static_cast<MidiInputPortAlsa*>(iter->second);
206			}
207			Ports.clear();
208
209			snd_seq_close(hAlsaSeq);
210	schoenebeck	221	}
211
212			MidiInputDeviceAlsa::MidiInputPortAlsa* MidiInputDeviceAlsa::CreateMidiPort() {
213			return new MidiInputPortAlsa(this);
214			}
215
216			String MidiInputDeviceAlsa::Name() {
217			return "ALSA";
218			}
219
220			String MidiInputDeviceAlsa::Driver() {
221			return Name();
222			}
223
224			void MidiInputDeviceAlsa::Listen() {
225			StartThread();
226			}
227
228			void MidiInputDeviceAlsa::StopListen() {
229			StopThread();
230			}
231
232	schoenebeck	201	String MidiInputDeviceAlsa::Description() {
233			return "Advanced Linux Sound Architecture";
234			}
235
236			String MidiInputDeviceAlsa::Version() {
237	schoenebeck	1715	String s = "$Revision: 1.22 $";
238	schoenebeck	201	return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
239			}
240
241			int MidiInputDeviceAlsa::Main() {
242			int npfd;
243			struct pollfd* pfd;
244			snd_seq_event_t* ev;
245
246			npfd = snd_seq_poll_descriptors_count(hAlsaSeq, POLLIN);
247			pfd = (struct pollfd) alloca(npfd sizeof(struct pollfd));
248			snd_seq_poll_descriptors(hAlsaSeq, pfd, npfd, POLLIN);
249			while (true) {
250			if (poll(pfd, npfd, 100000) > 0) {
251			do {
252			snd_seq_event_input(hAlsaSeq, &ev);
253	schoenebeck	221	int port = (int) ev->dest.port;
254			MidiInputPort* pMidiInputPort = Ports[port];
255	schoenebeck	201
256			switch (ev->type) {
257			case SND_SEQ_EVENT_CONTROLLER:
258	schoenebeck	947	if (ev->data.control.param == 0)
259			pMidiInputPort->DispatchBankSelectMsb(ev->data.control.value, ev->data.control.channel);
260			else if (ev->data.control.param == 32)
261			pMidiInputPort->DispatchBankSelectLsb(ev->data.control.value, ev->data.control.channel);
262	schoenebeck	1715	pMidiInputPort->DispatchControlChange(ev->data.control.param, ev->data.control.value, ev->data.control.channel);
263	schoenebeck	201	break;
264
265	persson	903	case SND_SEQ_EVENT_CHANPRESS:
266			pMidiInputPort->DispatchControlChange(128, ev->data.control.value, ev->data.control.channel);
267			break;
268
269	schoenebeck	201	case SND_SEQ_EVENT_PITCHBEND:
270			pMidiInputPort->DispatchPitchbend(ev->data.control.value, ev->data.control.channel);
271			break;
272
273			case SND_SEQ_EVENT_NOTEON:
274			if (ev->data.note.velocity != 0) {
275			pMidiInputPort->DispatchNoteOn(ev->data.note.note, ev->data.note.velocity, ev->data.control.channel);
276			}
277			else {
278			pMidiInputPort->DispatchNoteOff(ev->data.note.note, 0, ev->data.control.channel);
279			}
280			break;
281
282			case SND_SEQ_EVENT_NOTEOFF:
283			pMidiInputPort->DispatchNoteOff(ev->data.note.note, ev->data.note.velocity, ev->data.control.channel);
284			break;
285	schoenebeck	244
286			case SND_SEQ_EVENT_SYSEX:
287			pMidiInputPort->DispatchSysex(ev->data.ext.ptr, ev->data.ext.len);
288			break;
289	schoenebeck	551
290			case SND_SEQ_EVENT_PGMCHANGE:
291			pMidiInputPort->DispatchProgramChange(ev->data.control.value, ev->data.control.channel);
292			break;
293	schoenebeck	201	}
294			snd_seq_free_event(ev);
295			} while (snd_seq_event_input_pending(hAlsaSeq, 0) > 0);
296			}
297			}
298	schoenebeck	1344	// just to avoid a compiler warning
299			return EXIT_FAILURE;
300	schoenebeck	201	}
301
302			} // namespace LinuxSampler