2 * VST instrument support
4 * Derived from code that was marked:
5 * Copyright (C) Kjetil S. Matheussen 2004 (k.s.matheussen@notam02.no)
6 * Alsa-seq midi-code made by looking at the jack-rack source made by Bob Ham.
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.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * $Id: vsti.c,v 1.2 2004/04/07 01:56:23 pauld Exp $
35 #include "ardour/vestige/aeffectx.h"
40 create_sequencer (const char* client_name, bool isinput)
45 if ((err = snd_seq_open (&seq, "default", SND_SEQ_OPEN_DUPLEX, 0)) != 0) {
46 fst_error ("Could not open ALSA sequencer, aborting\n\n%s\n\n"
47 "Make sure you have configure ALSA properly and that\n"
48 "/proc/asound/seq/clients exists and contains relevant\n"
54 snd_seq_set_client_name (seq, client_name);
56 if ((err = snd_seq_create_simple_port (seq, isinput? "Input" : "Output",
57 (isinput? SND_SEQ_PORT_CAP_WRITE: SND_SEQ_PORT_CAP_READ)| SND_SEQ_PORT_CAP_DUPLEX |
58 SND_SEQ_PORT_CAP_SUBS_READ|SND_SEQ_PORT_CAP_SUBS_WRITE,
59 SND_SEQ_PORT_TYPE_APPLICATION|SND_SEQ_PORT_TYPE_SPECIFIC)) != 0) {
60 fst_error ("Could not create ALSA port: %s", snd_strerror (err));
69 queue_midi (JackVST *jvst, int val1, int val2, int val3)
72 jack_ringbuffer_data_t vec[2];
74 jack_ringbuffer_get_write_vector (jvst->event_queue, vec);
76 if (vec[0].len < sizeof (VstMidiEvent)) {
77 fst_error ("event queue has no write space");
81 pevent = (VstMidiEvent *) vec[0].buf;
83 // printf("note: %d\n",note);
85 pevent->type = kVstMidiType;
86 pevent->byteSize = 24;
87 pevent->deltaFrames = 0;
90 pevent->noteLength = 0;
91 pevent->noteOffset = 0;
92 pevent->reserved1 = 0;
93 pevent->reserved2 = 0;
94 pevent->noteOffVelocity = 0;
95 pevent->midiData[0] = val1;
96 pevent->midiData[1] = val2;
97 pevent->midiData[2] = val3;
98 pevent->midiData[3] = 0;
100 //printf("Sending: %x %x %x\n",val1,val2,val3);
102 jack_ringbuffer_write_advance (jvst->event_queue, sizeof (VstMidiEvent));
105 void *midireceiver(void *arg)
107 snd_seq_event_t *event;
108 JackVST *jvst = (JackVST* )arg;
111 struct sched_param scp;
112 scp.sched_priority = 50;
114 // Try to set fifo priority...
115 // this works, if we are root or newe sched-cap manegment is used...
116 pthread_setschedparam( pthread_self(), SCHED_FIFO, &scp );
120 snd_seq_event_input (jvst->seq, &event);
122 if (jvst->midiquit) {
127 case SND_SEQ_EVENT_NOTEON:
128 queue_midi(jvst,0x90+event->data.note.channel,event->data.note.note,event->data.note.velocity);
129 //printf("Noteon, channel: %d note: %d vol: %d\n",event->data.note.channel,event->data.note.note,event->data.note.velocity);
131 case SND_SEQ_EVENT_NOTEOFF:
132 queue_midi(jvst,0x80+event->data.note.channel,event->data.note.note,0);
133 //printf("Noteoff, channel: %d note: %d vol: %d\n",event->data.note.channel,event->data.note.note,event->data.note.velocity);
135 case SND_SEQ_EVENT_KEYPRESS:
136 //printf("Keypress, channel: %d note: %d vol: %d\n",event->data.note.channel,event->data.note.note,event->data.note.velocity);
137 queue_midi(jvst,0xa0+event->data.note.channel,event->data.note.note,event->data.note.velocity);
139 case SND_SEQ_EVENT_CONTROLLER:
140 queue_midi(jvst,0xb0+event->data.control.channel,event->data.control.param,event->data.control.value);
141 //printf("Control: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
143 case SND_SEQ_EVENT_PITCHBEND:
144 val=event->data.control.value + 0x2000;
145 queue_midi(jvst,0xe0+event->data.control.channel,val&127,val>>7);
146 //printf("Pitch: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
148 case SND_SEQ_EVENT_CHANPRESS:
149 //printf("chanpress: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
150 queue_midi(jvst,0xd0+event->data.control.channel,event->data.control.value,0);
152 case SND_SEQ_EVENT_PGMCHANGE:
153 //printf("pgmchange: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
154 queue_midi(jvst,0xc0+event->data.control.channel,event->data.control.value,0);
157 //printf("Unknown type: %d\n",event->type);
165 void stop_midireceiver (JackVST *jvst)
168 snd_seq_event_t event;
169 snd_seq_t *seq2 = create_sequencer ("jfstquit", true);
173 snd_seq_connect_to (seq2, 0, snd_seq_client_id (jvst->seq),0);
174 snd_seq_ev_clear (&event);
175 snd_seq_ev_set_direct (&event);
176 snd_seq_ev_set_subs (&event);
177 snd_seq_ev_set_source (&event, 0);
178 snd_seq_ev_set_controller (&event,1,0x80,50);
180 if ((err = snd_seq_event_output (seq2, &event)) < 0) {
181 fst_error ("cannot send stop event to midi thread: %s\n",
185 snd_seq_drain_output (seq2);
186 snd_seq_close (seq2);
187 pthread_join (jvst->midi_thread,NULL);
188 snd_seq_close (jvst->seq);