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:
                        pAudioThread->SendControlChange(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:
                        if (ev->data.note.velocity != 0) {
                            pAudioThread->SendNoteOn(ev->data.note.note, ev->data.note.velocity);
                        }
                        else {
                            pAudioThread->SendNoteOff(ev->data.note.note, 0);
                        }
                        break;

                    case SND_SEQ_EVENT_NOTEOFF:
                        pAudioThread->SendNoteOff(ev->data.note.note, ev->data.note.velocity);
                        break;
                }
                snd_seq_free_event(ev);
            } while (snd_seq_event_input_pending(seq_handle, 0) > 0);
        }
    }
}

1	schoenebeck	9	/***************************************************************************
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			int portid;
36			if (snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0) < 0) {
37			fprintf(stderr, "Error opening ALSA sequencer.\n");
38			exit(1);
39			}
40			snd_seq_set_client_name(seq_handle, "LinuxSampler");
41			if ((portid = snd_seq_create_simple_port(seq_handle, "LinuxSampler",
42			SND_SEQ_PORT_CAP_WRITE\|SND_SEQ_PORT_CAP_SUBS_WRITE,
43			SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
44			fprintf(stderr, "Error creating sequencer port.\n");
45			exit(1);
46			}
47			return 0;
48			}
49
50			void MidiIn::close_alsa_midi_seq(void) {
51			}
52
53			int MidiIn::Main() {
54			int res = open_alsa_midi_seq();
55			if (res < 0) {
56			fprintf(stderr,"opening of MIDI in device failed, exiting.\n");
57			exit(1);
58			}
59
60			int npfd;
61			struct pollfd *pfd;
62			snd_seq_event_t *ev;
63
64			npfd = snd_seq_poll_descriptors_count(seq_handle, POLLIN);
65			pfd = (struct pollfd )alloca(npfd sizeof(struct pollfd));
66			snd_seq_poll_descriptors(seq_handle, pfd, npfd, POLLIN);
67			while (true) {
68			if (poll(pfd, npfd, 100000) > 0) {
69			do {
70			snd_seq_event_input(seq_handle, &ev);
71			switch (ev->type) {
72			case SND_SEQ_EVENT_CONTROLLER:
73	schoenebeck	18	pAudioThread->SendControlChange(ev->data.control.channel, ev->data.control.param, ev->data.control.value);
74	schoenebeck	9	break;
75
76			case SND_SEQ_EVENT_PITCHBEND:
77	senoner	10	// fprintf(stderr, "Pitchbender event on Channel %2d: %5d \n",
78			// ev->data.control.channel, ev->data.control.value);
79	schoenebeck	9	break;
80
81			case SND_SEQ_EVENT_NOTEON:
82			if (ev->data.note.velocity != 0) {
83	schoenebeck	18	pAudioThread->SendNoteOn(ev->data.note.note, ev->data.note.velocity);
84	schoenebeck	9	}
85			else {
86	schoenebeck	18	pAudioThread->SendNoteOff(ev->data.note.note, 0);
87	schoenebeck	9	}
88			break;
89
90			case SND_SEQ_EVENT_NOTEOFF:
91	schoenebeck	18	pAudioThread->SendNoteOff(ev->data.note.note, ev->data.note.velocity);
92	schoenebeck	9	break;
93			}
94			snd_seq_free_event(ev);
95			} while (snd_seq_event_input_pending(seq_handle, 0) > 0);
96	schoenebeck	18	}
97			}
98	schoenebeck	9	}
99	senoner	10