godot/drivers/chibi/cp_envelope.cpp
2015-04-18 14:38:54 -03:00

371 lines
7.8 KiB
C++

/*************************************************************************/
/* cp_envelope.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "cp_envelope.h"
CPEnvelope::CPEnvelope() {
reset();
}
void CPEnvelope::reset() {
on=false;
carry=false;
loop_on=false;
loop_begin_node=0;
loop_end_node=0;
sustain_loop_on=false;
sustain_loop_begin_node=0;
sustain_loop_end_node=0;
node_count=0;
}
int CPEnvelope::get_height_at_pos(int pos) {
if (node_count && pos>node[node_count-1].tick_offset)
return node[node_count-1].value;
int begin_x,begin_y;
int end_x,end_y,xdif;
int count=0;
int limit=-1;
if (node_count<2) return NO_POINT;
while ((count<node_count) && (limit==-1)) {
if (node[count].tick_offset>=pos) limit=count;
count++;
}
if (pos==0) return node[0].value;
if (limit==-1) return NO_POINT;
begin_x=node[limit-1].tick_offset;
end_x=node[limit].tick_offset;
begin_y=node[limit-1].value;
end_y=node[limit].value;
xdif=end_x-begin_x;
return begin_y+((pos-begin_x)*(end_y-begin_y))/(xdif?xdif:1);
}
/*
int CPEnvelope::get_fx_height_at_pos(int pos) {
if (node_count && pos>node[node_count-1].tick_offset)
return node[node_count-1].value<<FX_HEIGHT_BITS;
int begin_x,begin_y;
int end_x,end_y,xdif;
int count=0;
int limit=-1;
if (node_count<2) return NO_POINT;
while ((count<node_count) && (limit==-1)) {
if (node[count].tick_offset>=pos) limit=count;
count++;
}
if (pos==0) return node[0].value<<FX_HEIGHT_BITS;
if (limit==-1) return NO_POINT;
begin_x=node[limit-1].tick_offset;
end_x=node[limit].tick_offset;
begin_y=node[limit-1].value;
end_y=node[limit].value;
xdif=end_x-begin_x;
return (begin_y<<FX_HEIGHT_BITS)+((pos-begin_x)*(end_y-begin_y)*(int)(1<<FX_HEIGHT_BITS))/(xdif?xdif:1);
}
*/
float CPEnvelope::get_interp_height_at_pos(float pos) {
if (node_count && pos>node[node_count-1].tick_offset)
return node[node_count-1].value;
int begin_x,begin_y;
int end_x,end_y,xdif;
int count=0;
int limit=-1;
if (node_count<2) return NO_POINT;
while ((count<node_count) && (limit==-1)) {
if (node[count].tick_offset>=pos) limit=count;
count++;
}
if (pos==0) return node[0].value;
if (limit==-1) return NO_POINT;
begin_x=node[limit-1].tick_offset;
end_x=node[limit].tick_offset;
begin_y=node[limit-1].value;
end_y=node[limit].value;
xdif=end_x-begin_x;
return begin_y+((pos-begin_x)*(end_y-begin_y))/(xdif?xdif:1);
}
void CPEnvelope::set_position(int p_node,int p_x,int p_y) {
if (p_node>=node_count) return;
if (p_node==0) {
p_x=0;
} else if (p_x<=node[p_node-1].tick_offset) {
p_x=node[p_node-1].tick_offset+1;
} else if ((p_node<(node_count-1)) && (p_x>=node[p_node+1].tick_offset)) {
p_x=node[p_node+1].tick_offset-1;
}
if (p_x>=9999) p_x=9999;
if (p_y>max_value) p_y=max_value;
if (p_y<min_value) p_y=min_value;
node[p_node].tick_offset=p_x;
node[p_node].value=p_y;
}
int CPEnvelope::add_position(int p_x,int p_y,bool p_move_loops) {
if (node_count==MAX_POINTS) return -1;
int i,new_node;
// if this is assigning an existing node, let's quit.
for (i=0;i<node_count;i++) if (p_x==node[i].tick_offset) return -1;
i=0;
while ((i<node_count) && (p_x>=node[i].tick_offset)) i++;
new_node=i;
node_count++;
if (p_move_loops) {
if (loop_begin_node>=new_node) loop_begin_node++;
if (loop_end_node>=new_node) loop_end_node++;
if (sustain_loop_begin_node>=new_node) sustain_loop_begin_node++;
if (sustain_loop_end_node>=new_node) sustain_loop_end_node++;
}
for (i=node_count-1;i>new_node;i--) node[i]=node[i-1];
set_position(new_node,p_x,p_y);
return new_node;
}
void CPEnvelope::set_loop_begin(int pos) {
if ((pos<0) || (pos>=node_count)) return;
loop_begin_node=pos;
if (loop_end_node<loop_begin_node) loop_end_node=loop_begin_node;
}
void CPEnvelope::set_loop_end(int pos) {
if ((pos<0) || (pos>=node_count)) return;
loop_end_node=pos;
if (loop_end_node<loop_begin_node) loop_begin_node=loop_end_node;
}
void CPEnvelope::set_sustain_loop_begin(int pos) {
if ((pos<0) || (pos>=node_count)) return;
sustain_loop_begin_node=pos;
if (sustain_loop_end_node<sustain_loop_begin_node) sustain_loop_end_node=sustain_loop_begin_node;
}
void CPEnvelope::set_sustain_loop_end(int pos) {
if ((pos<0) || (pos>=node_count)) return;
sustain_loop_end_node=pos;
if (sustain_loop_end_node<sustain_loop_begin_node) sustain_loop_begin_node=sustain_loop_end_node;
}
void CPEnvelope::set_loop_enabled(bool p_enabled) {
loop_on=p_enabled;
}
bool CPEnvelope::is_loop_enabled() {
return loop_on;
}
void CPEnvelope::set_sustain_loop_enabled(bool p_enabled) {
sustain_loop_on=p_enabled;
}
bool CPEnvelope::is_sustain_loop_enabled() {
return sustain_loop_on;
}
void CPEnvelope::del_position(int p_node) {
if ((node_count<3) || (p_node<=0) || (p_node>=node_count)) return;
int i;
if (loop_begin_node>=p_node) loop_begin_node--;
if (loop_end_node>=p_node) loop_end_node--;
if (sustain_loop_begin_node>=p_node) sustain_loop_begin_node--;
if (sustain_loop_end_node>=p_node) sustain_loop_end_node--;
for (i=p_node;i<node_count-1;i++) node[i]=node[i+1];
node_count--;
}
uint8_t CPEnvelope::get_loop_begin() {
return loop_begin_node;
}
uint8_t CPEnvelope::get_loop_end() {
return loop_end_node;
}
uint8_t CPEnvelope::get_sustain_loop_begin() {
return sustain_loop_begin_node;
}
uint8_t CPEnvelope::get_sustain_loop_end() {
return sustain_loop_end_node;
}
void CPEnvelope::set_enabled(bool p_enabled) {
on=p_enabled;
}
bool CPEnvelope::is_enabled() {
return on;
}
void CPEnvelope::set_carry_enabled(bool p_enabled) {
carry=p_enabled;
}
bool CPEnvelope::is_carry_enabled() {
return carry;
}
uint8_t CPEnvelope::get_node_count() {
return node_count;
}
const CPEnvelope::Point& CPEnvelope::get_node(int p_idx) {
static Point errpoint;
if (p_idx<0 || p_idx>=node_count)
return node[node_count-1];
return node[p_idx];
}