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livetrax/libs/midi++2/midichannel.cc
Taybin Rutkin d09f6b3016 Initial revision
git-svn-id: svn://localhost/trunk/ardour2@4 d708f5d6-7413-0410-9779-e7cbd77b26cf
2005-05-13 20:47:18 +00:00

305 lines
6.9 KiB
C++

/*
Copyright (C) 1998-99 Paul Barton-Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
*/
#include <midi++/types.h>
#include <midi++/port.h>
#include <midi++/channel.h>
using namespace sigc;
using namespace MIDI;
Channel::Channel (byte channelnum, Port &p) : port (p)
{
channel_number = channelnum;
reset (false);
}
void
Channel::connect_input_signals ()
{
port.input()->channel_pressure[channel_number].connect
(mem_fun (*this, &Channel::process_chanpress));
port.input()->channel_note_on[channel_number].connect
(mem_fun (*this, &Channel::process_note_on));
port.input()->channel_note_off[channel_number].connect
(mem_fun (*this, &Channel::process_note_off));
port.input()->channel_poly_pressure[channel_number].connect
(mem_fun (*this, &Channel::process_polypress));
port.input()->channel_program_change[channel_number].connect
(mem_fun (*this, &Channel::process_program_change));
port.input()->channel_controller[channel_number].connect
(mem_fun (*this, &Channel::process_controller));
port.input()->channel_pitchbend[channel_number].connect
(mem_fun (*this, &Channel::process_pitchbend));
port.input()->reset.connect (mem_fun (*this, &Channel::process_reset));
}
void
Channel::connect_output_signals ()
{
port.output()->channel_pressure[channel_number].connect
(mem_fun (*this, &Channel::process_chanpress));
port.output()->channel_note_on[channel_number].connect
(mem_fun (*this, &Channel::process_note_on));
port.output()->channel_note_off[channel_number].connect
(mem_fun (*this, &Channel::process_note_off));
port.output()->channel_poly_pressure[channel_number].connect
(mem_fun (*this, &Channel::process_polypress));
port.output()->channel_program_change[channel_number].connect
(mem_fun (*this, &Channel::process_program_change));
port.output()->channel_controller[channel_number].connect
(mem_fun (*this, &Channel::process_controller));
port.output()->channel_pitchbend[channel_number].connect
(mem_fun (*this, &Channel::process_pitchbend));
port.output()->reset.connect (mem_fun (*this, &Channel::process_reset));
}
void
Channel::reset (bool notes_off)
{
program_number = channel_number;
bank_number = 0;
pitch_bend = 0;
_last_note_on = 0;
_last_note_off = 0;
_last_on_velocity = 0;
_last_off_velocity = 0;
if (notes_off) {
all_notes_off ();
}
memset (polypress, 0, sizeof (polypress));
memset (controller_msb, 0, sizeof (controller_msb));
memset (controller_lsb, 0, sizeof (controller_lsb));
/* zero all controllers XXX not necessarily the right thing */
memset (controller_val, 0, sizeof (controller_val));
for (int n = 0; n < 128; n++) {
controller_14bit[n] = false;
}
rpn_msb = 0;
rpn_lsb = 0;
nrpn_msb = 0;
nrpn_lsb = 0;
_omni = true;
_poly = false;
_mono = true;
_notes_on = 0;
}
void
Channel::process_note_off (Parser &parser, EventTwoBytes *tb)
{
_last_note_off = tb->note_number;
_last_off_velocity = tb->velocity;
if (_notes_on) {
_notes_on--;
}
}
void
Channel::process_note_on (Parser &parser, EventTwoBytes *tb)
{
_last_note_on = tb->note_number;
_last_on_velocity = tb->velocity;
_notes_on++;
}
void
Channel::process_controller (Parser &parser, EventTwoBytes *tb)
{
unsigned short cv;
/* XXX arguably need a lock here to protect non-atomic changes
to controller_val[...]. or rather, need to make sure that
all changes *are* atomic.
*/
if (tb->controller_number <= 31) { /* unsigned: no test for >= 0 */
/* if this controller is already known to use 14 bits,
then treat this value as the MSB, and combine it
with the existing LSB.
otherwise, just treat it as a 7 bit value, and set
it directly.
*/
cv = (unsigned short) controller_val[tb->controller_number];
if (controller_14bit[tb->controller_number]) {
cv = ((tb->value << 7) | (cv & 0x7f));
} else {
cv = tb->value;
}
controller_val[tb->controller_number] = (controller_value_t)cv;
} else if ((tb->controller_number >= 32 &&
tb->controller_number <= 63)) {
cv = (unsigned short) controller_val[tb->controller_number];
/* LSB for CC 0-31 arrived.
If this is the first time (i.e. its currently
flagged as a 7 bit controller), mark the
controller as 14 bit, adjust the existing value
to be the MSB, and OR-in the new LSB value.
otherwise, OR-in the new low 7bits with the old
high 7.
*/
int cn = tb->controller_number - 32;
if (controller_14bit[cn] == false) {
controller_14bit[cn] = true;
cv = (cv << 7) | (tb->value & 0x7f);
} else {
cv = (cv & 0x3f80) | (tb->value & 0x7f);
}
controller_val[tb->controller_number] =
(controller_value_t) cv;
} else {
/* controller can only take 7 bit values */
controller_val[tb->controller_number] =
(controller_value_t) tb->value;
}
/* bank numbers are special, in that they have their own signal
*/
if (tb->controller_number == 0) {
bank_number = (unsigned short) controller_val[0];
if (port.input()) {
port.input()->bank_change (*port.input(), bank_number);
port.input()->channel_bank_change[channel_number]
(*port.input(), bank_number);
}
}
}
void
Channel::process_program_change (Parser &parser, byte val)
{
program_number = val;
}
void
Channel::process_chanpress (Parser &parser, byte val)
{
chanpress = val;
}
void
Channel::process_polypress (Parser &parser, EventTwoBytes *tb)
{
polypress[tb->note_number] = tb->value;
}
void
Channel::process_pitchbend (Parser &parser, pitchbend_t val)
{
pitch_bend = val;
}
void
Channel::process_reset (Parser &parser)
{
reset ();
}
int
Channel::channel_msg (byte id, byte val1, byte val2)
{
unsigned char msg[3];
int len = 0;
msg[0] = id | (channel_number & 0xf);
switch (id) {
case off:
msg[1] = val1 & 0x7F;
msg[2] = val2 & 0x7F;
len = 3;
break;
case on:
msg[1] = val1 & 0x7F;
msg[2] = val2 & 0x7F;
len = 3;
break;
case MIDI::polypress:
msg[1] = val1 & 0x7F;
msg[2] = val2 & 0x7F;
len = 3;
break;
case controller:
msg[1] = val1 & 0x7F;
msg[2] = val2 & 0x7F;
len = 3;
break;
case MIDI::program:
msg[1] = val1 & 0x7F;
len = 2;
break;
case MIDI::chanpress:
msg[1] = val1 & 0x7F;
len = 2;
break;
case MIDI::pitchbend:
msg[1] = val1 & 0x7F;
msg[2] = val2 & 0x7F;
len = 3;
break;
}
return port.midimsg (msg, len);
}