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