230 lines
6.7 KiB
C++
230 lines
6.7 KiB
C++
/* FluidSynth - A Software Synthesizer
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*
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* Copyright (C) 2003 Peter Hanappe and others.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License
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* as published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307, USA
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*/
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#include "fluid.h"
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#include "sfont.h"
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#include "gen.h"
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namespace FluidS {
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//---------------------------------------------------------
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// Channel
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//---------------------------------------------------------
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Channel::Channel(Fluid* s, int num)
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{
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synth = s;
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channum = num;
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_preset = 0;
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banknum = 0;
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prognum = 0;
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reset();
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}
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//---------------------------------------------------------
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// reset
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//---------------------------------------------------------
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void Channel::reset()
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{
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init();
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initCtrl();
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}
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//---------------------------------------------------------
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// init
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//---------------------------------------------------------
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void Channel::init()
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{
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sfontnum = 0;
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setPreset(synth->find_preset(banknum, prognum));
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interp_method = FLUID_INTERP_DEFAULT;
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nrpn_select = 0;
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}
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//---------------------------------------------------------
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// initCtrl
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//---------------------------------------------------------
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void Channel::initCtrl()
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{
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key_pressure = 0;
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channel_pressure = 0;
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pitch_bend = 0x2000; // Range is 0x4000, pitch bend wheel starts in centered position
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pitch_wheel_sensitivity = 12; /* twelve semi-tones */
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bank_msb = 0;
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for (int i = 0; i < GEN_LAST; i++) {
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gen[i] = 0.0f;
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gen_abs[i] = 0;
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}
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for (int i = 0; i < 128; i++)
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setCC(i, 0);
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/* Volume / initial attenuation (MSB & LSB) */
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setCC(VOLUME_MSB, 127);
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setCC(VOLUME_LSB, 0);
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/* Pan (MSB & LSB) */
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setCC(PAN_MSB, 64);
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setCC(PAN_LSB, 64);
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/* Expression (MSB & LSB) */
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setCC(EXPRESSION_MSB, 127);
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setCC(EXPRESSION_LSB, 127);
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}
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//---------------------------------------------------------
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// setcc
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//---------------------------------------------------------
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void Channel::setcc(int num, int value)
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{
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cc[num] = value;
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//printf("setcc %d %d\n", num, value);
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switch (num) {
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case SUSTAIN_SWITCH:
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if (value < 64)
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synth->damp_voices(channum);
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break;
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case BANK_SELECT_MSB:
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{
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bank_msb = value & 0x7f;
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setBanknum(bank_msb << 7);
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}
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break;
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case BANK_SELECT_LSB:
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/* FIXME: according to the Downloadable Sounds II specification,
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bit 31 should be set when we receive the message on channel
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10 (drum channel) */
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setBanknum((value & 0x7f) + (bank_msb << 7));
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break;
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case ALL_NOTES_OFF:
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synth->allNotesOff(channum);
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break;
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case ALL_SOUND_OFF:
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synth->allSoundsOff(channum);
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break;
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case ALL_CTRL_OFF:
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initCtrl();
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synth->modulate_voices_all(channum);
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break;
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case DATA_ENTRY_MSB:
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{
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int data = (value << 7) + cc[DATA_ENTRY_LSB];
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/* SontFont 2.01 NRPN Message (Sect. 9.6, p. 74) */
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if ((cc[NRPN_MSB] == 120) && (cc[NRPN_LSB] < 100)) {
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float val = fluid_gen_scale_nrpn(nrpn_select, data);
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qDebug("%s: %d: Data = %d, value = %f", __FILE__, __LINE__, data, val);
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synth->set_gen(channum, nrpn_select, val);
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}
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break;
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}
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case NRPN_MSB:
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cc[NRPN_LSB] = 0;
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nrpn_select = 0;
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break;
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case NRPN_LSB:
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/* SontFont 2.01 NRPN Message (Sect. 9.6, p. 74) */
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if (cc[NRPN_MSB] == 120) {
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if (value == 100)
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nrpn_select += 100;
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else if (value == 101)
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nrpn_select += 1000;
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else if (value == 102)
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nrpn_select += 10000;
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else if (value < 100) {
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nrpn_select += value;
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qDebug("%s: %d: NRPN Select = %d", __FILE__, __LINE__, nrpn_select);
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}
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}
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break;
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case RPN_MSB:
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break;
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case RPN_LSB:
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/* erase any previously received NRPN message */
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cc[NRPN_MSB] = 0;
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cc[NRPN_LSB] = 0;
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nrpn_select = 0;
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break;
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default:
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synth->modulate_voices(channum, true, num);
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}
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}
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//---------------------------------------------------------
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// getCC
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//---------------------------------------------------------
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int Channel::getCC(int num)
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{
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return ((num >= 0) && (num < 128))? cc[num] : 0;
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}
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//---------------------------------------------------------
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// pitchBend
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//---------------------------------------------------------
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void Channel::pitchBend(int val)
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{
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pitch_bend = val;
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synth->modulate_voices(channum, false, FLUID_MOD_PITCHWHEEL);
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}
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//---------------------------------------------------------
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// pitchWheelSens
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//---------------------------------------------------------
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void Channel::pitchWheelSens(int val)
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{
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pitch_wheel_sensitivity = val;
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synth->modulate_voices(channum, false, FLUID_MOD_PITCHWHEELSENS);
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}
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//---------------------------------------------------------
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// setPreset
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//---------------------------------------------------------
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void Channel::setPreset(Preset* p)
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{
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if (_preset != p) {
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if (p)
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p->loadSamples();
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_preset = p;
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}
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}
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}
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