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/*
* Diverse Bristol midi routines.
* Copyright (c) by Nick Copeland <nickycopeland@hotmail.com> 1996,2012
*
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "bristolmessages.h"
#include "bristol.h"
#include "bristolmidi.h"
#ifdef _BRISTOL_JACK_MIDI
#include <jack/jack.h>
#include <jack/midiport.h>
extern bristolMidiMain bmidi;
/* We only have one of these for a single registration per engine. */
static jack_client_t *client = NULL;
static int deviceIndex = -1;
static jack_port_t *input_port = NULL;
extern void checkcallbacks(bristolMidiMsg *);
void
jackMidiRegisterPort(jack_port_t *midi_input_port)
{
input_port = midi_input_port;
}
int
jackMidiRoutine(jack_nframes_t nframes, void *arg)
{
int i;
void* port_buf;
jack_midi_event_t in_event;
jack_nframes_t event_count;
bristolMidiMsg msg;
if (input_port == NULL)
return(0);
port_buf = jack_port_get_buffer(input_port, nframes);
event_count = jack_midi_get_event_count(port_buf);
bmidi.dev[deviceIndex].flags = BRISTOL_CONN_JACK|0x40000000;
if (event_count <= 0)
return(0);
/*
else
printf("received %i events\n", event_count);
` */
for (i = 0; i < event_count; i++)
{
memset(&in_event, 0, sizeof(jack_midi_event_t));
memset(&msg, 0, sizeof(bristolMidiMsg));
if (jack_midi_event_get(&in_event, port_buf, i) != 0)
continue;
/*
printf(" event %d time is %d. %x/%i/%i (%i)\n", i, in_event.time,
*(in_event.buffer), *(in_event.buffer+1), *(in_event.buffer+2),
in_event.size);
*/
/*
* Convert these events into our internal format and then have then
* dispatched. We could probably call a quite early routine since we
* appear to have reasonably raw midi.
*
* Jack always gives me a status byte. We need to parse this then parse
* the actual midi message.
*/
bristolMidiRawToMsg(in_event.buffer, in_event.size, 0, deviceIndex,
&msg);
if (bristolMidiRawToMsg(in_event.buffer + 1, in_event.size - 1, 0,
deviceIndex, &msg) > 0)
{
msg.params.bristol.msgLen = in_event.size;
msg.params.bristol.from = deviceIndex;
msg.offset = in_event.time;
checkcallbacks(&msg);
} else if (bmidi.flags & BRISTOL_BMIDI_DEBUG)
printf("unknown jack midi event\n");
}
/*
jack_midi_event_get(&in_event, port_buf, 0);
for (i=0; i<nframes; i++)
{
if ((in_event.time == i) && (event_index < event_count))
{
if( ((*(in_event.buffer) & 0xf0)) == 0x90 )
{
note = *(in_event.buffer + 1);
note_on = 1.0;
}
else if( ((*(in_event.buffer)) & 0xf0) == 0x80 )
{
note = *(in_event.buffer + 1);
note_on = 0.0;
}
event_index++;
if(event_index < event_count)
jack_midi_event_get(&in_event, port_buf, event_index);
}
}
*/
return 0;
}
void jack_midi_shutdown(void *arg)
{
exit(1);
}
int
bristolMidiJackOpen(char *devname, int flags, int chan, int messages,
int (*callback)(), void *param, int dev, int handle)
{
printf("bristolMidiJackOpen(%s, %i, %x)\n", devname, dev, flags);
deviceIndex = dev;
// bmidi.flags &= ~BRISTOL_MIDI_FORWARD;
// bmidi.dev[dev].flags = BRISTOL_CONN_JACK|0x40000000;
if (client == 0)
{
if ((client = jack_client_open(devname, 0, NULL)) == 0)
{
fprintf(stderr, "jack server not running?\n");
return 1;
}
printf("registered jack midi name %s\n", devname);
jack_set_process_callback(client, jackMidiRoutine, (void *) dev);
jack_on_shutdown(client, jack_midi_shutdown, 0);
input_port = jack_port_register(client, "midi_in",
JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
if (jack_activate(client))
{
fprintf(stderr, "cannot activate client");
return 1;
}
} else {
input_port = jack_port_register(client, "midi_in",
JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
printf("reused jack registration\n");
}
return(handle);
}
void
bristolJackSetMidiHandle(jack_client_t *jackHandle)
{
client = jackHandle;
}
int
bristolMidiJackClose(int handle)
{
jack_client_close(client);
return(handle);
}
#else /* _BRISTOL_JACK */
/*
* No jack so if we got here we need a couple of error messages to say so.
*/
int
bristolMidiJackOpen(char *devname, int flags, int chan, int messages,
int (*callback)(), void *param, int dev, int handle)
{
printf("Jack MIDI requested but not linked into the library\n");
return(BRISTOL_MIDI_DRIVER);
}
int
bristolMidiJackClose(int handle)
{
printf("Jack MIDI close not linked into the library\n");
return(BRISTOL_MIDI_DRIVER);
}
#endif
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