| 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 |
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 |
pAudioThread->SendControlChange(ev->data.control.channel, ev->data.control.param, ev->data.control.value); |
| 74 |
break; |
| 75 |
|
| 76 |
case SND_SEQ_EVENT_PITCHBEND: |
| 77 |
// fprintf(stderr, "Pitchbender event on Channel %2d: %5d \n", |
| 78 |
// ev->data.control.channel, ev->data.control.value); |
| 79 |
break; |
| 80 |
|
| 81 |
case SND_SEQ_EVENT_NOTEON: |
| 82 |
if (ev->data.note.velocity != 0) { |
| 83 |
pAudioThread->SendNoteOn(ev->data.note.note, ev->data.note.velocity); |
| 84 |
} |
| 85 |
else { |
| 86 |
pAudioThread->SendNoteOff(ev->data.note.note, 0); |
| 87 |
} |
| 88 |
break; |
| 89 |
|
| 90 |
case SND_SEQ_EVENT_NOTEOFF: |
| 91 |
pAudioThread->SendNoteOff(ev->data.note.note, ev->data.note.velocity); |
| 92 |
break; |
| 93 |
} |
| 94 |
snd_seq_free_event(ev); |
| 95 |
} while (snd_seq_event_input_pending(seq_handle, 0) > 0); |
| 96 |
} |
| 97 |
} |
| 98 |
} |
| 99 |
|
Parent Directory
| 
Revision Log