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/*
* This file is part of din.
*
* din is copyright (c) 2006 - 2012 S Jagannathan <jag@dinisnoise.org>
* For more information, please visit http://dinisnoise.org
*
* din 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.
*
* din 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 din. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef __DRONE
#define __DRONE
#include "fader.h"
#include "beat2value.h"
#include "solver.h"
#include "play.h"
struct mod_params {
float depth;
float bpm;
float b, db; // beat, delta on beat2value curve -> see calc (..)
float result;
mod_params (beat2value& bv) {
int reset = 1;
clear (bv, reset);
}
void set_bpm (beat2value& bv, float value, int reset = 0) {
bv.set_bpm (value);
bpm = bv.bpm;
extern audio_out aout;
db = bv.delta * aout.samples_per_channel; // modulate once every audio buffer
if (reset) b = bv.sol.firstx;
}
void calc (beat2value& bv) {
result = depth * bv.sol (b, db);
}
void clear (beat2value& bv, int reset = 0) {
depth = 0;
set_bpm (bv, 30, reset);
}
};
struct drone_modulation {
// am, fm modulation curves - shared by all drones
// x - beat, y - modulation level
static beat2value am_crv, fm_crv;
enum {FM = 1, AM};
mod_params am, fm;
int active;
drone_modulation () : am (am_crv), fm (fm_crv) {
active = 0;
}
void clear () {
am.clear (am_crv);
fm.clear (fm_crv);
active = 0;
}
void calc () {
am.calc (am_crv);
fm.calc (fm_crv);
}
void calc_active () {
active = (((am.depth == 0) || (am.bpm == 0)) && ((fm.depth == 0) || (fm.bpm == 0))) ? 0:1;
}
};
struct din;
struct drone {
play player; // player for this drone
solver sol; // solver for this drone
float step; // determines pitch (see note.h)
float vol; // actual volume
int range; // range number on microtonal-keyboard
float pos; // position in range (0 - left, 1 - right, can go < 0 & > 1 too)
int sel; // selected?
// visual
//
int x, y; // current position
int dy; // height from microtonal-keyboard bottom
box<int> handle; // for picking
float r, g, b; // color
int cx, cy; // position on creation / unmodulated position
// drone trails
std::list< point<int> > trailq;
std::list< point<int> >::size_type num_trail_points;
int handle_size;
enum {DEAD, ACTIVE, RISING, FALLING}; // states
int state; // state
fader fdr; // for rising/falling -> fade in/out color
drone_modulation mod; // modulation parameters
drone () {
step = vol = 0;
range = pos = 0;
r = g = b = 0.5;
x = y = dy = 0;
sel = 0;
state = RISING;
extern int DRONE_HANDLE_SIZE, TRAIL_LENGTH;
handle_size = DRONE_HANDLE_SIZE;
num_trail_points = TRAIL_LENGTH;
}
void calc_handle () {
extern int BOTTOM;
y = BOTTOM + dy;
handle (x - handle_size, y - handle_size, x + handle_size, y + handle_size);
}
void set_xy (din& board, const int& x, const int& y);
void change_bpm (mod_params& mp, beat2value& bv, float delta) {
float bpm = mp.bpm + delta;
mp.set_bpm (bv, bpm);
}
void change_bpm (int i, int what, float delta) {
if (what == drone_modulation::FM) {
change_bpm (mod.fm, drone_modulation::fm_crv, delta);
cons << "drone: " << i << ", FM bpm = " << mod.fm.bpm << eol;
} else {
change_bpm (mod.am, drone_modulation::am_crv, delta);
cons << "drone: " << i << ", AM bpm = " << mod.am.bpm << eol;
}
mod.calc_active ();
}
void change_depth (int i, int what, float delta) {
if (what == drone_modulation::FM) {
mod.fm.depth += delta;
cons << "drone: " << i << ", FM depth = " << mod.fm.depth << eol;
} else {
mod.am.depth += delta;
cons << "drone: " << i << ", AM depth = " << mod.am.depth << eol;
}
mod.calc_active ();
}
};
#endif
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