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/* FluidSynth - A Software Synthesizer
*
* Copyright (C) 2003 Peter Hanappe and others.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include "fluid.h"
#include "sfont.h"
#include "gen.h"
namespace FluidS {
//---------------------------------------------------------
// Channel
//---------------------------------------------------------
Channel::Channel(Fluid* s, int num)
{
synth = s;
channum = num;
_preset = 0;
banknum = 0;
prognum = 0;
reset();
}
//---------------------------------------------------------
// reset
//---------------------------------------------------------
void Channel::reset()
{
init();
initCtrl();
}
//---------------------------------------------------------
// init
//---------------------------------------------------------
void Channel::init()
{
sfontnum = 0;
setPreset(synth->find_preset(banknum, prognum));
interp_method = FLUID_INTERP_DEFAULT;
nrpn_select = 0;
}
//---------------------------------------------------------
// initCtrl
//---------------------------------------------------------
void Channel::initCtrl()
{
key_pressure = 0;
channel_pressure = 0;
pitch_bend = 0x2000; // Range is 0x4000, pitch bend wheel starts in centered position
pitch_wheel_sensitivity = 2; /* two semi-tones */
bank_msb = 0;
for (int i = 0; i < GEN_LAST; i++) {
gen[i] = 0.0f;
gen_abs[i] = 0;
}
for (int i = 0; i < 128; i++)
setCC(i, 0);
/* Volume / initial attenuation (MSB & LSB) */
setCC(VOLUME_MSB, 127);
setCC(VOLUME_LSB, 0);
/* Pan (MSB & LSB) */
setCC(PAN_MSB, 64);
setCC(PAN_LSB, 64);
/* Expression (MSB & LSB) */
setCC(EXPRESSION_MSB, 127);
setCC(EXPRESSION_LSB, 127);
}
//---------------------------------------------------------
// setcc
//---------------------------------------------------------
void Channel::setcc(int num, int value)
{
cc[num] = value;
// printf("setcc %d %d\n", num, value);
switch (num) {
case SUSTAIN_SWITCH:
if (value < 64)
synth->damp_voices(channum);
break;
case BANK_SELECT_MSB:
{
bank_msb = value & 0x7f;
setBanknum(bank_msb << 7);
}
break;
case BANK_SELECT_LSB:
/* FIXME: according to the Downloadable Sounds II specification,
bit 31 should be set when we receive the message on channel
10 (drum channel) */
setBanknum((value & 0x7f) + (bank_msb << 7));
break;
case ALL_NOTES_OFF:
synth->allNotesOff(channum);
break;
case ALL_SOUND_OFF:
synth->allSoundsOff(channum);
break;
case ALL_CTRL_OFF:
initCtrl();
synth->modulate_voices_all(channum);
break;
case DATA_ENTRY_MSB:
{
int data = (value << 7) + cc[DATA_ENTRY_LSB];
/* SontFont 2.01 NRPN Message (Sect. 9.6, p. 74) */
if ((cc[NRPN_MSB] == 120) && (cc[NRPN_LSB] < 100)) {
float val = fluid_gen_scale_nrpn(nrpn_select, data);
synth->log("%s: %d: Data = %d, value = %f", __FILE__, __LINE__, data, val);
synth->set_gen(channum, nrpn_select, val);
}
break;
}
case NRPN_MSB:
cc[NRPN_LSB] = 0;
nrpn_select = 0;
break;
case NRPN_LSB:
/* SontFont 2.01 NRPN Message (Sect. 9.6, p. 74) */
if (cc[NRPN_MSB] == 120) {
if (value == 100)
nrpn_select += 100;
else if (value == 101)
nrpn_select += 1000;
else if (value == 102)
nrpn_select += 10000;
else if (value < 100) {
nrpn_select += value;
synth->log("%s: %d: NRPN Select = %d", __FILE__, __LINE__, nrpn_select);
}
}
break;
case RPN_MSB:
break;
case RPN_LSB:
/* erase any previously received NRPN message */
cc[NRPN_MSB] = 0;
cc[NRPN_LSB] = 0;
nrpn_select = 0;
break;
default:
synth->modulate_voices(channum, true, num);
}
}
//---------------------------------------------------------
// getCC
//---------------------------------------------------------
int Channel::getCC(int num)
{
return ((num >= 0) && (num < 128))? cc[num] : 0;
}
//---------------------------------------------------------
// pitchBend
//---------------------------------------------------------
void Channel::pitchBend(int val)
{
pitch_bend = val;
synth->modulate_voices(channum, false, FLUID_MOD_PITCHWHEEL);
}
//---------------------------------------------------------
// pitchWheelSens
//---------------------------------------------------------
void Channel::pitchWheelSens(int val)
{
pitch_wheel_sensitivity = val;
synth->modulate_voices(channum, false, FLUID_MOD_PITCHWHEELSENS);
}
//---------------------------------------------------------
// setPreset
//---------------------------------------------------------
void Channel::setPreset(Preset* p)
{
if (_preset != p) {
if (p)
p->loadSamples();
_preset = p;
}
}
}
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