FDK24/メディア/サウンド/WASAPI/Sound.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Diagnostics;
   4 using System.Linq;
   5 using CSCore;
   6
   7 namespace FDK.メディア.サウンド.WASAPI
   8 {
   9         public class Sound : IDisposable
  10         {
  11                 public long 長さsample
  12                 {
  13                         get { return this._SampleSource.Length; }
  14                 }
  15
  16                 public double 長さsec
  17                 {
  18                         get { return this.長さsample / ( this.WaveFormat.Channels * this.WaveFormat.SampleRate ); }
  19                 }
  20
  21                 public long 位置sample
  22                 {
  23                         get { return this._SampleSource.Position; }
  24                         set { this._SampleSource.Position = value; }
  25                 }
  26
  27                 public double 位置sec
  28                 {
  29                         get
  30                         {
  31                                 return this.位置sample / ( this.WaveFormat.Channels * this.WaveFormat.SampleRate );
  32                         }
  33                         set
  34                         {
  35                                 long position = (long) ( value * this.WaveFormat.SampleRate * this.WaveFormat.Channels + 0.5 ); // +0.5 は四捨五入
  36                                 position -= ( position % this.WaveFormat.Channels );    // チャンネル数の倍数にする。
  37
  38                                 if( ( 0 > position ) || ( this.長さsample <= position ) )
  39                                         throw new ArgumentOutOfRangeException();
  40
  41                                 this.位置sample = position;
  42                         }
  43                 }
  44
  45                 public WaveFormat WaveFormat
  46                 {
  47                         get { return this._SampleSource.WaveFormat; }
  48                 }
  49
  50                 public CSCore.ISampleSource SampleSource
  51                 {
  52                         get { return this._SampleSource; }
  53                 }
  54
  55                 /// <summary>
  56                 /// 音量。0.0(無音)～1.0(原音)。
  57                 /// </summary>
  58                 public float Volume
  59                 {
  60                         get { return this._Volume; }
  61                         set
  62                         {
  63                                 if( ( 0.0f > value ) || ( 1.0f < value ) )
  64                                         throw new ArgumentOutOfRangeException();
  65
  66                                 this._Volume = value;
  67                         }
  68                 }
  69
  70                 /// <summary>
  71                 /// Sound の生成は、コンストラクタではなく Device.CreateSound() で行うこと。
  72                 /// （Device 内部で持っている Mixer への参照が必要なため。）
  73                 /// </summary>
  74                 /// <param name="path">サウンドファイルパス</param>
  75                 /// <param name="mixer">使用する Mixer。</param>
  76                 internal Sound( string path, Mixer mixer )
  77                 {
  78                         this._MixerRef = new WeakReference<Mixer>( mixer );
  79                         this._WaveSource = new Decoder( path, mixer.WaveFormat );
  80                         this._SampleSource = this._WaveSource.ToSampleSource();
  81                 }
  82
  83                 public void Dispose()
  84                 {
  85                         this.Stop();
  86
  87                         FDK.Utilities.解放する( ref this._SampleSource );
  88                         FDK.Utilities.解放する( ref this._WaveSource );
  89                         this._MixerRef = null;
  90                 }
  91
  92                 public void Play()
  93                 {
  94                         Mixer mixer;
  95                         if( this._MixerRef.TryGetTarget( out mixer ) )
  96                                 mixer.AddSound( this );
  97                 }
  98
  99                 public void Stop()
 100                 {
 101                         Mixer mixer;
 102                         if( this._MixerRef.TryGetTarget( out mixer ) )
 103                                 mixer.RemoveSound( this );
 104                 }
 105
 106                 private CSCore.IWaveSource _WaveSource = null;
 107                 private CSCore.ISampleSource _SampleSource = null;
 108                 private System.WeakReference<Mixer> _MixerRef = null;
 109                 private float _Volume = 1.0f;
 110         }
 111 }