trunk/src/midiin.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003 by Benno Senoner and 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 "midiin.h"

MidiIn::MidiIn(AudioThread* pAudioThread) : Thread(true, 1, -1) {
    this->pAudioThread = pAudioThread;
    memset(MIDIControllerTable, 0x00, 128); // set all controller values to zero
}

MidiIn::~MidiIn() {
    close_alsa_midi_seq();
}

int MidiIn::open_alsa_midi_seq(void) {

    int portid;

    if (snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
        fprintf(stderr, "Error opening ALSA sequencer.\n");
        exit(1);
    }
    snd_seq_set_client_name(seq_handle, "LinuxSampler");
    if ((portid = snd_seq_create_simple_port(seq_handle, "LinuxSampler",
                                             SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE,
                                             SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
        fprintf(stderr, "Error creating sequencer port.\n");
        exit(1);
    }
    return 0;
}

void MidiIn::close_alsa_midi_seq(void) {
}

int MidiIn::Main() {

    int res = open_alsa_midi_seq();
    if (res < 0) {
        fprintf(stderr,"opening of MIDI in device failed, exiting.\n");
        exit(1);
    }

    int npfd;
    struct pollfd *pfd;
    snd_seq_event_t *ev;

    npfd = snd_seq_poll_descriptors_count(seq_handle, POLLIN);
    pfd = (struct pollfd *)alloca(npfd * sizeof(struct pollfd));
    snd_seq_poll_descriptors(seq_handle, pfd, npfd, POLLIN);
    while (true) {
        if (poll(pfd, npfd, 100000) > 0) {

            do {
                snd_seq_event_input(seq_handle, &ev);

                switch (ev->type) {
                    case SND_SEQ_EVENT_CONTROLLER:
                     //   fprintf(stderr, "Control event on Channel %2d: num=%5d val=%5d       \n",
                     //           ev->data.control.channel, ev->data.control.param, ev->data.control.value);

                          pAudioThread->ProcessContinuousController(ev->data.control.channel, ev->data.control.param, ev->data.control.value);

                        break;

                    case SND_SEQ_EVENT_PITCHBEND:
                      //  fprintf(stderr, "Pitchbender event on Channel %2d: %5d   \n",
                      //          ev->data.control.channel, ev->data.control.value);
                        break;

                    case SND_SEQ_EVENT_NOTEON:
                        //fprintf(stderr, "Note On event on Channel %2d: note=%5d velocity=%d      \n",
                        //        ev->data.control.channel, ev->data.note.note, ev->data.note.velocity);
                        if (ev->data.note.velocity != 0) {
                            pAudioThread->ProcessNoteOn(ev->data.note.note, ev->data.note.velocity);
                        }
                        else {
                            pAudioThread->ProcessNoteOff(ev->data.note.note, 0);
                        }
                        break;

                    case SND_SEQ_EVENT_NOTEOFF:
                        //fprintf(stderr, "Note Off event on Channel %2d: note=%5d velocity=%d      \n",
                        //        ev->data.control.channel, ev->data.note.note, ev->data.note.velocity);
                        pAudioThread->ProcessNoteOff(ev->data.note.note, ev->data.note.velocity);
                        break;
                }
                snd_seq_free_event(ev);
            } while (snd_seq_event_input_pending(seq_handle, 0) > 0);
        } // end of if(poll...)
    }  // end of while
}

1	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck *
6	* *
7	* This program is free software; you can redistribute it and/or modify *
8	* it under the terms of the GNU General Public License as published by *
9	* the Free Software Foundation; either version 2 of the License, or *
10	* (at your option) any later version. *
11	* *
12	* This program is distributed in the hope that it will be useful, *
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15	* GNU General Public License for more details. *
16	* *
17	* You should have received a copy of the GNU General Public License *
18	* along with this program; if not, write to the Free Software *
19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20	* MA 02111-1307 USA *
21	***************************************************************************/
22
23	#include "midiin.h"
24
25	MidiIn::MidiIn(AudioThread* pAudioThread) : Thread(true, 1, -1) {
26	this->pAudioThread = pAudioThread;
27	memset(MIDIControllerTable, 0x00, 128); // set all controller values to zero
28	}
29
30	MidiIn::~MidiIn() {
31	close_alsa_midi_seq();
32	}
33
34	int MidiIn::open_alsa_midi_seq(void) {
35
36	int portid;
37
38	if (snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
39	fprintf(stderr, "Error opening ALSA sequencer.\n");
40	exit(1);
41	}
42	snd_seq_set_client_name(seq_handle, "LinuxSampler");
43	if ((portid = snd_seq_create_simple_port(seq_handle, "LinuxSampler",
44	SND_SEQ_PORT_CAP_WRITE\|SND_SEQ_PORT_CAP_SUBS_WRITE,
45	SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
46	fprintf(stderr, "Error creating sequencer port.\n");
47	exit(1);
48	}
49	return 0;
50	}
51
52	void MidiIn::close_alsa_midi_seq(void) {
53	}
54
55	int MidiIn::Main() {
56
57	int res = open_alsa_midi_seq();
58	if (res < 0) {
59	fprintf(stderr,"opening of MIDI in device failed, exiting.\n");
60	exit(1);
61	}
62
63	int npfd;
64	struct pollfd *pfd;
65	snd_seq_event_t *ev;
66
67	npfd = snd_seq_poll_descriptors_count(seq_handle, POLLIN);
68	pfd = (struct pollfd )alloca(npfd sizeof(struct pollfd));
69	snd_seq_poll_descriptors(seq_handle, pfd, npfd, POLLIN);
70	while (true) {
71	if (poll(pfd, npfd, 100000) > 0) {
72
73	do {
74	snd_seq_event_input(seq_handle, &ev);
75
76	switch (ev->type) {
77	case SND_SEQ_EVENT_CONTROLLER:
78	// fprintf(stderr, "Control event on Channel %2d: num=%5d val=%5d \n",
79	// ev->data.control.channel, ev->data.control.param, ev->data.control.value);
80
81	pAudioThread->ProcessContinuousController(ev->data.control.channel, ev->data.control.param, ev->data.control.value);
82
83	break;
84
85	case SND_SEQ_EVENT_PITCHBEND:
86	// fprintf(stderr, "Pitchbender event on Channel %2d: %5d \n",
87	// ev->data.control.channel, ev->data.control.value);
88	break;
89
90	case SND_SEQ_EVENT_NOTEON:
91	//fprintf(stderr, "Note On event on Channel %2d: note=%5d velocity=%d \n",
92	// ev->data.control.channel, ev->data.note.note, ev->data.note.velocity);
93	if (ev->data.note.velocity != 0) {
94	pAudioThread->ProcessNoteOn(ev->data.note.note, ev->data.note.velocity);
95	}
96	else {
97	pAudioThread->ProcessNoteOff(ev->data.note.note, 0);
98	}
99	break;
100
101	case SND_SEQ_EVENT_NOTEOFF:
102	//fprintf(stderr, "Note Off event on Channel %2d: note=%5d velocity=%d \n",
103	// ev->data.control.channel, ev->data.note.note, ev->data.note.velocity);
104	pAudioThread->ProcessNoteOff(ev->data.note.note, ev->data.note.velocity);
105	break;
106	}
107	snd_seq_free_event(ev);
108	} while (snd_seq_event_input_pending(seq_handle, 0) > 0);
109	} // end of if(poll...)
110	} // end of while
111	}
112