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/*
* VibratoPointItertorBySec.cs
* Copyright © 2010-2011 kbinani
*
* This file is part of org.kbinani.cadencii.
*
* org.kbinani.cadencii is free software; you can redistribute it and/or
* modify it under the terms of the GPLv3 License.
*
* org.kbinani.cadencii 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.
*/
#if JAVA
package org.kbinani.cadencii;
import java.util.*;
import org.kbinani.vsq.*;
#else
using System;
using org.kbinani.vsq;
using org.kbinani.java.util;
namespace org.kbinani.cadencii {
using boolean = System.Boolean;
#endif
/// <summary>
/// ビブラート用のデータ点のリストを取得します。返却されるリストは、{秒, ビブラートの振幅(ノートナンバー単位)}の値ペアとなっています
/// </summary>
#if JAVA
public class VibratoPointIteratorBySec implements Iterator<PointD> {
#else
public class VibratoPointIteratorBySec : Iterator<PointD> {
#endif
VsqFileEx vsq;
VibratoBPList rate;
int start_rate;
VibratoBPList depth;
int start_depth;
int clock_start;
int clock_width;
float sec_resolution;
double sec0;
double sec1;
int count = 0;
double phase = 0.0;
double amplitude;
float period;
float omega;
double sec;
float fadewidth;
int i;
boolean first = true;
// Rate値から周期を高速に求めるためのキャッシュ
private static float[] mVibratoPeriod = null;
/// <summary>
/// VibratoRate値からビブラートの周期を求めます。単位は秒
/// </summary>
/// <param name="rate"></param>
/// <returns></returns>
public static float getPeriodFromRate( int rate ) {
if ( mVibratoPeriod == null ) {
// キャッシュが初期化されていない場合は初期化
mVibratoPeriod = new float[128];
for ( int r = 0; r < 128; r++ ) {
mVibratoPeriod[r] = (float)Math.Exp( 5.24 - 1.07e-2 * r ) * 2.0f / 1000.0f;
}
}
if ( rate < 0 || 128 <= rate ) {
// 範囲外のRate値の場合はいちいち計算。ほんとはだめだけどー
return (float)Math.Exp( 5.24 - 1.07e-2 * rate ) * 2.0f / 1000.0f;
} else {
// 範囲内のRate値の場合はキャッシュの値を返すだけ
return mVibratoPeriod[rate];
}
}
public PointD next() {
if ( first ) {
i = 0;
first = false;
return new PointD( sec0, 0 );
} else {
i++;
if ( i < count ) {
double t_sec = sec0 + sec_resolution * i;
double clock = vsq.getClockFromSec( t_sec );
if ( sec0 <= t_sec && t_sec <= sec0 + fadewidth ) {
amplitude *= (float)(t_sec - sec0) / fadewidth;
}
if ( sec1 - fadewidth <= t_sec && t_sec <= sec1 ) {
amplitude *= (float)(sec1 - t_sec) / fadewidth;
}
phase += omega * (t_sec - sec);
PointD ret = new PointD( t_sec, amplitude * Math.Sin( phase ) );
float v = (float)(clock - clock_start) / (float)clock_width;
int r = rate.getValue( v, start_rate );
int d = depth.getValue( v, start_depth );
amplitude = d * 2.5f / 127.0f / 2.0f;
period = getPeriodFromRate( r );
omega = (float)(2.0 * Math.PI / period);
sec = t_sec;
return ret;
} else {
return new PointD();
}
}
}
public boolean hasNext() {
if ( first ) {
return true;
} else {
return (i + 1 < count);
}
}
public void remove() {
}
public VibratoPointIteratorBySec( VsqFileEx vsq,
VibratoBPList rate,
int start_rate,
VibratoBPList depth,
int start_depth,
int clock_start,
int clock_width,
float sec_resolution ) {
this.vsq = vsq;
this.rate = rate;
this.start_rate = start_rate;
this.depth = depth;
this.start_depth = start_depth;
this.clock_start = clock_start;
this.clock_width = clock_width;
this.sec_resolution = sec_resolution;
sec0 = vsq.getSecFromClock( clock_start );
sec1 = vsq.getSecFromClock( clock_start + clock_width );
count = (int)((sec1 - sec0) / sec_resolution);
phase = 0;
start_rate = rate.getValue( 0.0f, start_rate );
start_depth = depth.getValue( 0.0f, start_depth );
amplitude = start_depth * 2.5f / 127.0f / 2.0f; // ビブラートの振幅。
period = getPeriodFromRate( start_rate ); //ビブラートの周期、秒
omega = (float)(2.0 * Math.PI / period); // 角速度(rad/sec)
sec = sec0;
fadewidth = (float)(sec1 - sec0) * 0.2f;
}
}
#if !JAVA
}
#endif
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