git-svn-id: svn://localhost/ardour2/trunk@630 d708f5d6-7413-0410-9779-e7cbd77b26cf
182 lines
5.7 KiB
C
182 lines
5.7 KiB
C
/*
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* VST instrument support
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*
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* Derived from code that was marked:
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* Copyright (C) Kjetil S. Matheussen 2004 (k.s.matheussen@notam02.no)
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* Alsa-seq midi-code made by looking at the jack-rack source made by Bob Ham.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: vsti.c,v 1.2 2004/04/07 01:56:23 pauld Exp $
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <memory.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <jackvst.h>
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#include <vst/aeffectx.h>
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snd_seq_t *
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create_sequencer (const char* client_name, bool isinput)
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{
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snd_seq_t * seq;
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int err;
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if ((err = snd_seq_open (&seq, "default", SND_SEQ_OPEN_DUPLEX, 0)) != 0) {
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fst_error ("Could not open ALSA sequencer, aborting\n\n%s\n\n"
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"Make sure you have configure ALSA properly and that\n"
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"/proc/asound/seq/clients exists and contains relevant\n"
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"devices (%s).",
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snd_strerror (err));
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return NULL;
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}
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snd_seq_set_client_name (seq, client_name);
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if ((err = snd_seq_create_simple_port (seq, isinput? "Input" : "Output",
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(isinput? SND_SEQ_PORT_CAP_WRITE: SND_SEQ_PORT_CAP_READ)| SND_SEQ_PORT_CAP_DUPLEX |
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SND_SEQ_PORT_CAP_SUBS_READ|SND_SEQ_PORT_CAP_SUBS_WRITE,
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SND_SEQ_PORT_TYPE_APPLICATION|SND_SEQ_PORT_TYPE_SPECIFIC)) != 0) {
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fst_error ("Could not create ALSA port: %s", snd_strerror (err));
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snd_seq_close(seq);
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return NULL;
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}
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return seq;
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}
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static void
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queue_midi (JackVST *jvst, int val1, int val2, int val3)
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{
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struct VstMidiEvent *pevent;
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jack_ringbuffer_data_t vec[2];
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jack_ringbuffer_get_write_vector (jvst->event_queue, vec);
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if (vec[0].len < sizeof (struct VstMidiEvent)) {
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fst_error ("event queue has no write space");
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return;
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}
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pevent = (struct VstMidiEevent *) vec[0].buf;
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// printf("note: %d\n",note);
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pevent->type = kVstMidiType;
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pevent->byteSize = 24;
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pevent->deltaFrames = 0;
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pevent->flags = 0;
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pevent->detune = 0;
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pevent->noteLength = 0;
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pevent->noteOffset = 0;
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pevent->reserved1 = 0;
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pevent->reserved2 = 0;
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pevent->noteOffVelocity = 0;
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pevent->midiData[0] = val1;
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pevent->midiData[1] = val2;
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pevent->midiData[2] = val3;
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pevent->midiData[3] = 0;
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//printf("Sending: %x %x %x\n",val1,val2,val3);
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jack_ringbuffer_write_advance (jvst->event_queue, sizeof (struct VstMidiEvent));
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}
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void *midireceiver(void *arg)
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{
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snd_seq_event_t *event;
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JackVST *jvst = (JackVST* )arg;
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int val;
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while (1) {
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snd_seq_event_input (jvst->seq, &event);
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if (jvst->midiquit) {
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break;
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}
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switch(event->type){
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case SND_SEQ_EVENT_NOTEON:
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queue_midi(jvst,0x90+event->data.note.channel,event->data.note.note,event->data.note.velocity);
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//printf("Noteon, channel: %d note: %d vol: %d\n",event->data.note.channel,event->data.note.note,event->data.note.velocity);
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break;
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case SND_SEQ_EVENT_NOTEOFF:
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queue_midi(jvst,0x80+event->data.note.channel,event->data.note.note,0);
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//printf("Noteoff, channel: %d note: %d vol: %d\n",event->data.note.channel,event->data.note.note,event->data.note.velocity);
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break;
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case SND_SEQ_EVENT_KEYPRESS:
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//printf("Keypress, channel: %d note: %d vol: %d\n",event->data.note.channel,event->data.note.note,event->data.note.velocity);
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queue_midi(jvst,0xa0+event->data.note.channel,event->data.note.note,event->data.note.velocity);
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break;
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case SND_SEQ_EVENT_CONTROLLER:
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queue_midi(jvst,0xb0+event->data.control.channel,event->data.control.param,event->data.control.value);
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//printf("Control: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
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break;
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case SND_SEQ_EVENT_PITCHBEND:
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val=event->data.control.value + 0x2000;
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queue_midi(jvst,0xe0+event->data.control.channel,val&127,val>>7);
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//printf("Pitch: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
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break;
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case SND_SEQ_EVENT_CHANPRESS:
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//printf("chanpress: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
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queue_midi(jvst,0xd0+event->data.control.channel,event->data.control.value,0);
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break;
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case SND_SEQ_EVENT_PGMCHANGE:
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//printf("pgmchange: %d %d %d\n",event->data.control.channel,event->data.control.param,event->data.control.value);
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queue_midi(jvst,0xc0+event->data.control.channel,event->data.control.value,0);
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break;
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default:
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//printf("Unknown type: %d\n",event->type);
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break;
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}
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}
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return NULL;
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}
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void stop_midireceiver (JackVST *jvst)
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{
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int err;
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snd_seq_event_t event;
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snd_seq_t *seq2 = create_sequencer ("jfstquit", true);
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jvst->midiquit = 1;
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snd_seq_connect_to (seq2, 0, snd_seq_client_id (jvst->seq),0);
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snd_seq_ev_clear (&event);
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snd_seq_ev_set_direct (&event);
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snd_seq_ev_set_subs (&event);
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snd_seq_ev_set_source (&event, 0);
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snd_seq_ev_set_controller (&event,1,0x80,50);
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if ((err = snd_seq_event_output (seq2, &event)) < 0) {
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fst_error ("cannot send stop event to midi thread: %s\n",
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snd_strerror (err));
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}
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snd_seq_drain_output (seq2);
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snd_seq_close (seq2);
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pthread_join (jvst->midi_thread,NULL);
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snd_seq_close (jvst->seq);
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}
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