C++でVST作り
C++でVST作り

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MIDIメッセージ処理(改良版)

MIDIメッセージにあわせて動作するVSTのサンプルの改良版である。
下記VSTはSynthとしてロードされ、常にノイズを発生させる。実行時は音量に注意してほしい。
ノイズのボリュームをMIDI CC7でコントロールできる。

サンプルコード全体


【CMidiMsg.h】 
  1. #pragma once
  2. #include <string.h>
  3. #include "audioeffectx.h"
  4.  
  5. // ============================================================================================
  6. // MIDI処理用の定義
  7. // ============================================================================================
  8. #define MIDIMSG_MAXNUM 255
  9.  
  10. struct MidiMessage
  11. {
  12. 	VstInt32 deltaFrames;  //MIDIメッセージを処理するタイミング
  13. 	unsigned char message; //MIDIメッセージ番号
  14. 	unsigned char channel; //MIDIチャンネル
  15. 	unsigned char data1;   //MIDIデータ1
  16. 	unsigned char data2;   //MIDIデータ2
  17. };
  18.  
  19. class CMidiMsg
  20. {
  21. protected:
  22. 	int          cur;                 //読み込み中のMIDIの位置
  23. 	int          num;                 //受け取ったMIDIメッセージの数
  24. 	MidiMessage  buf[MIDIMSG_MAXNUM]; //受け取ったMIDIメッセージを保管するバッファ
  25. public:
  26. 	CMidiMsg(void);
  27. 	~CMidiMsg(void);
  28.  
  29. 	// バッファのクリア等を行う。
  30. 	virtual void clearMidiMsg();
  31.  
  32. 	// MIDIメッセージをバッファに追加する
  33. 	// バッファへの追加が成功すると1、失敗すると0を返す
  34. 	virtual int addMidiMsg(VstMidiEvent *midievent);
  35. 	virtual int addMidiMsg(MidiMessage msg);
  36.  
  37. 	// バッファからMIDIメッセージを取り出す
  38. 	virtual MidiMessage getMidiMsg();
  39.  
  40. 	// バッファ中にあるMIDIメッセージの数を返す
  41. 	virtual VstInt32 getMidiMessageNum();
  42.  
  43. 	// バッファから最初に取り出せるMIDIメッセージのDeltaFramesを返す
  44. 	virtual VstInt32 getNextDeltaFrames();
  45.  
  46. 	// MIDIメッセージが何かを判断し、そのメッセージに対応した
  47. 	// onMidiKeyOn()関数、onMidiControlChange()関数等を呼び出す。
  48. 	virtual void midiProc(MidiMessage mididata);
  49.  
  50. 	// midiProc()関数から呼び出される。
  51. 	// それぞれのMIDIメッセージに応じて処理を行う
  52. 	// 以下6つはオーバーライドして使うとよい
  53. 	virtual void onMidiKeyOn  (unsigned char channel, unsigned char noteNo, unsigned char velo) {}; // 関数の中身は空
  54. 	virtual void onMidiKeyOff (unsigned char channel, unsigned char noteNo, unsigned char velo) {}; // 関数の中身は空
  55. 	virtual void onMidiProgramChange(unsigned char channel, unsigned char program) {};              // 関数の中身は空
  56. 	virtual void onMidiPoliKeyPress (unsigned char channel, unsigned char noteNo, unsigned char pressure) {}; // 関数の中身は空
  57. 	virtual void onMidiChannelPress (unsigned char channel, unsigned char pressure) {};             // 関数の中身は空
  58. 	virtual void onMidiPitchBend    (unsigned char channel, short pb) {};                           // 関数の中身は空
  59. 	// 以下2つはあまりオーバーライドして使う必要はない
  60. 	virtual void onMidiSystemMessage(unsigned char systemmsg, unsigned char data1, unsigned char data2); // 中身はCMidiMsg.cppに記載
  61. 	virtual void onMidiControlChange(unsigned char channel, unsigned char cc, unsigned char value);      // 中身はCMidiMsg.cppに記載
  62.  
  63. 	// onMidiSystemMessage()関数より呼び出される。
  64. 	// システムメッセージに応じて処理する関数
  65. 	// オーバーライドして使うとよい
  66. 	// (ただし、ホストアプリケーションからSystem Messageが送られることはあまり無い？)
  67. 	virtual void onMidiQuarterFrame(unsigned char data) {};
  68. 	virtual void onMidiSongPointer(short songpoint) {};
  69. 	virtual void onMidiSongSelect(unsigned char data) {};
  70. 	virtual void onMidiChainRequest() {};
  71. 	virtual void onMidiTimingClock() {};
  72. 	virtual void onMidiStart() {};
  73. 	virtual void onMidiContinue() {};
  74. 	virtual void onMidiStop(){};
  75. 	virtual void onMidiActiveSensing() {};
  76. 	virtual void onMidiSystemReset() {};
  77.  
  78. 	// onMidiControlChange()関数より呼び出される。
  79. 	// コントロールチェンジメッセージに応じて処理する関数
  80. 	// オーバーライドして使うとよい
  81. 	virtual void onMidiCC000 (unsigned char channel, unsigned char value) {};
  82. 	virtual void onMidiCC001 (unsigned char channel, unsigned char value) {}; // ModulationDepth
  83. 	virtual void onMidiCC002 (unsigned char channel, unsigned char value) {};
  84. 	virtual void onMidiCC003 (unsigned char channel, unsigned char value) {};
  85. 	virtual void onMidiCC004 (unsigned char channel, unsigned char value) {};
  86. 	virtual void onMidiCC005 (unsigned char channel, unsigned char value) {}; // PortamentTime
  87. 	virtual void onMidiCC006 (unsigned char channel, unsigned char value) {};
  88. 	virtual void onMidiCC007 (unsigned char channel, unsigned char value) {}; // ChannelVolume
  89. 	virtual void onMidiCC008 (unsigned char channel, unsigned char value) {};
  90. 	virtual void onMidiCC009 (unsigned char channel, unsigned char value) {};
  91. 	virtual void onMidiCC010 (unsigned char channel, unsigned char value) {}; // Pan
  92. 	virtual void onMidiCC011 (unsigned char channel, unsigned char value) {};
  93. 	virtual void onMidiCC012 (unsigned char channel, unsigned char value) {}; // Expression
  94. 	virtual void onMidiCC013 (unsigned char channel, unsigned char value) {};
  95. 	virtual void onMidiCC014 (unsigned char channel, unsigned char value) {};
  96. 	virtual void onMidiCC015 (unsigned char channel, unsigned char value) {};
  97. 	virtual void onMidiCC016 (unsigned char channel, unsigned char value) {};
  98. 	virtual void onMidiCC017 (unsigned char channel, unsigned char value) {};
  99. 	virtual void onMidiCC018 (unsigned char channel, unsigned char value) {};
  100. 	virtual void onMidiCC019 (unsigned char channel, unsigned char value) {};
  101. 	virtual void onMidiCC020 (unsigned char channel, unsigned char value) {};
  102. 	virtual void onMidiCC021 (unsigned char channel, unsigned char value) {};
  103. 	virtual void onMidiCC022 (unsigned char channel, unsigned char value) {};
  104. 	virtual void onMidiCC023 (unsigned char channel, unsigned char value) {};
  105. 	virtual void onMidiCC024 (unsigned char channel, unsigned char value) {};
  106. 	virtual void onMidiCC025 (unsigned char channel, unsigned char value) {};
  107. 	virtual void onMidiCC026 (unsigned char channel, unsigned char value) {};
  108. 	virtual void onMidiCC027 (unsigned char channel, unsigned char value) {};
  109. 	virtual void onMidiCC028 (unsigned char channel, unsigned char value) {};
  110. 	virtual void onMidiCC029 (unsigned char channel, unsigned char value) {};
  111. 	virtual void onMidiCC030 (unsigned char channel, unsigned char value) {};
  112. 	virtual void onMidiCC031 (unsigned char channel, unsigned char value) {};
  113. 	virtual void onMidiCC032 (unsigned char channel, unsigned char value) {};
  114. 	virtual void onMidiCC033 (unsigned char channel, unsigned char value) {};
  115. 	virtual void onMidiCC034 (unsigned char channel, unsigned char value) {};
  116. 	virtual void onMidiCC035 (unsigned char channel, unsigned char value) {};
  117. 	virtual void onMidiCC036 (unsigned char channel, unsigned char value) {};
  118. 	virtual void onMidiCC037 (unsigned char channel, unsigned char value) {};
  119. 	virtual void onMidiCC038 (unsigned char channel, unsigned char value) {};
  120. 	virtual void onMidiCC039 (unsigned char channel, unsigned char value) {};
  121. 	virtual void onMidiCC040 (unsigned char channel, unsigned char value) {};
  122. 	virtual void onMidiCC041 (unsigned char channel, unsigned char value) {};
  123. 	virtual void onMidiCC042 (unsigned char channel, unsigned char value) {};
  124. 	virtual void onMidiCC043 (unsigned char channel, unsigned char value) {};
  125. 	virtual void onMidiCC044 (unsigned char channel, unsigned char value) {};
  126. 	virtual void onMidiCC045 (unsigned char channel, unsigned char value) {};
  127. 	virtual void onMidiCC046 (unsigned char channel, unsigned char value) {};
  128. 	virtual void onMidiCC047 (unsigned char channel, unsigned char value) {};
  129. 	virtual void onMidiCC048 (unsigned char channel, unsigned char value) {};
  130. 	virtual void onMidiCC049 (unsigned char channel, unsigned char value) {};
  131. 	virtual void onMidiCC050 (unsigned char channel, unsigned char value) {};
  132. 	virtual void onMidiCC051 (unsigned char channel, unsigned char value) {};
  133. 	virtual void onMidiCC052 (unsigned char channel, unsigned char value) {};
  134. 	virtual void onMidiCC053 (unsigned char channel, unsigned char value) {};
  135. 	virtual void onMidiCC054 (unsigned char channel, unsigned char value) {};
  136. 	virtual void onMidiCC055 (unsigned char channel, unsigned char value) {};
  137. 	virtual void onMidiCC056 (unsigned char channel, unsigned char value) {};
  138. 	virtual void onMidiCC057 (unsigned char channel, unsigned char value) {};
  139. 	virtual void onMidiCC058 (unsigned char channel, unsigned char value) {};
  140. 	virtual void onMidiCC059 (unsigned char channel, unsigned char value) {};
  141. 	virtual void onMidiCC060 (unsigned char channel, unsigned char value) {};
  142. 	virtual void onMidiCC061 (unsigned char channel, unsigned char value) {};
  143. 	virtual void onMidiCC062 (unsigned char channel, unsigned char value) {};
  144. 	virtual void onMidiCC063 (unsigned char channel, unsigned char value) {};
  145. 	virtual void onMidiCC064 (unsigned char channel, unsigned char value) {}; // DumperPedal
  146. 	virtual void onMidiCC065 (unsigned char channel, unsigned char value) {}; // PortamentOnOff
  147. 	virtual void onMidiCC066 (unsigned char channel, unsigned char value) {}; // SostenutoPedal
  148. 	virtual void onMidiCC067 (unsigned char channel, unsigned char value) {}; // SoftPedal
  149. 	virtual void onMidiCC068 (unsigned char channel, unsigned char value) {};
  150. 	virtual void onMidiCC069 (unsigned char channel, unsigned char value) {};
  151. 	virtual void onMidiCC070 (unsigned char channel, unsigned char value) {};
  152. 	virtual void onMidiCC071 (unsigned char channel, unsigned char value) {}; // Resonance
  153. 	virtual void onMidiCC072 (unsigned char channel, unsigned char value) {}; // ReleaseTime
  154. 	virtual void onMidiCC073 (unsigned char channel, unsigned char value) {}; // AttackTime
  155. 	virtual void onMidiCC074 (unsigned char channel, unsigned char value) {}; // Brightness
  156. 	virtual void onMidiCC075 (unsigned char channel, unsigned char value) {}; // DecayTime
  157. 	virtual void onMidiCC076 (unsigned char channel, unsigned char value) {}; // VibratoRate
  158. 	virtual void onMidiCC077 (unsigned char channel, unsigned char value) {}; // VibratoDepth
  159. 	virtual void onMidiCC078 (unsigned char channel, unsigned char value) {}; // VibratoDelay
  160. 	virtual void onMidiCC079 (unsigned char channel, unsigned char value) {};
  161. 	virtual void onMidiCC080 (unsigned char channel, unsigned char value) {};
  162. 	virtual void onMidiCC081 (unsigned char channel, unsigned char value) {};
  163. 	virtual void onMidiCC082 (unsigned char channel, unsigned char value) {};
  164. 	virtual void onMidiCC083 (unsigned char channel, unsigned char value) {};
  165. 	virtual void onMidiCC084 (unsigned char channel, unsigned char value) {};
  166. 	virtual void onMidiCC085 (unsigned char channel, unsigned char value) {};
  167. 	virtual void onMidiCC086 (unsigned char channel, unsigned char value) {};
  168. 	virtual void onMidiCC087 (unsigned char channel, unsigned char value) {};
  169. 	virtual void onMidiCC088 (unsigned char channel, unsigned char value) {};
  170. 	virtual void onMidiCC089 (unsigned char channel, unsigned char value) {};
  171. 	virtual void onMidiCC090 (unsigned char channel, unsigned char value) {};
  172. 	virtual void onMidiCC091 (unsigned char channel, unsigned char value) {}; // ReverbSend
  173. 	virtual void onMidiCC092 (unsigned char channel, unsigned char value) {}; // ChorusSend
  174. 	virtual void onMidiCC093 (unsigned char channel, unsigned char value) {};
  175. 	virtual void onMidiCC094 (unsigned char channel, unsigned char value) {};
  176. 	virtual void onMidiCC095 (unsigned char channel, unsigned char value) {};
  177. 	virtual void onMidiCC096 (unsigned char channel, unsigned char value) {};
  178. 	virtual void onMidiCC097 (unsigned char channel, unsigned char value) {};
  179. 	virtual void onMidiCC098 (unsigned char channel, unsigned char value) {};
  180. 	virtual void onMidiCC099 (unsigned char channel, unsigned char value) {};
  181. 	virtual void onMidiCC100 (unsigned char channel, unsigned char value) {};
  182. 	virtual void onMidiCC101 (unsigned char channel, unsigned char value) {};
  183. 	virtual void onMidiCC102 (unsigned char channel, unsigned char value) {};
  184. 	virtual void onMidiCC103 (unsigned char channel, unsigned char value) {};
  185. 	virtual void onMidiCC104 (unsigned char channel, unsigned char value) {};
  186. 	virtual void onMidiCC105 (unsigned char channel, unsigned char value) {};
  187. 	virtual void onMidiCC106 (unsigned char channel, unsigned char value) {};
  188. 	virtual void onMidiCC107 (unsigned char channel, unsigned char value) {};
  189. 	virtual void onMidiCC108 (unsigned char channel, unsigned char value) {};
  190. 	virtual void onMidiCC109 (unsigned char channel, unsigned char value) {};
  191. 	virtual void onMidiCC110 (unsigned char channel, unsigned char value) {};
  192. 	virtual void onMidiCC111 (unsigned char channel, unsigned char value) {};
  193. 	virtual void onMidiCC112 (unsigned char channel, unsigned char value) {};
  194. 	virtual void onMidiCC113 (unsigned char channel, unsigned char value) {};
  195. 	virtual void onMidiCC114 (unsigned char channel, unsigned char value) {};
  196. 	virtual void onMidiCC115 (unsigned char channel, unsigned char value) {};
  197. 	virtual void onMidiCC116 (unsigned char channel, unsigned char value) {};
  198. 	virtual void onMidiCC117 (unsigned char channel, unsigned char value) {};
  199. 	virtual void onMidiCC118 (unsigned char channel, unsigned char value) {};
  200. 	virtual void onMidiCC119 (unsigned char channel, unsigned char value) {};
  201. 	virtual void onMidiCC120 (unsigned char channel, unsigned char value) {}; // AllSoundOff
  202. 	virtual void onMidiCC121 (unsigned char channel, unsigned char value) {}; // AllControlReset
  203. 	virtual void onMidiCC122 (unsigned char channel, unsigned char value) {};
  204. 	virtual void onMidiCC123 (unsigned char channel, unsigned char value) {};
  205. 	virtual void onMidiCC124 (unsigned char channel, unsigned char value) {};
  206. 	virtual void onMidiCC125 (unsigned char channel, unsigned char value) {};
  207. 	virtual void onMidiCC126 (unsigned char channel, unsigned char value) {}; // MonoModeOnOff
  208. 	virtual void onMidiCC127 (unsigned char channel, unsigned char value) {}; // PoliModeOnOff
  209. };

【CMidiMsg.cpp】 
  1. #include "CMidiMsg.h"
  2.  
  3. CMidiMsg::CMidiMsg(void)
  4. {
  5. 	clearMidiMsg();
  6. }
  7.  
  8. CMidiMsg::~CMidiMsg(void)
  9. {
  10. }
  11.  
  12. void CMidiMsg::clearMidiMsg()
  13. {
  14. 	// メンバー変数を初期化する
  15. 	cur=0;
  16. 	num=0;
  17. 	memset(buf, 0, sizeof(MidiMessage)*MIDIMSG_MAXNUM);
  18. }
  19.  
  20. int CMidiMsg::addMidiMsg(VstMidiEvent *midievent)
  21. {
  22. 	MidiMessage tmp;
  23. 	tmp.deltaFrames = midievent->deltaFrames;
  24. 	tmp.message = midievent->midiData[0] & 0xF0;
  25. 	tmp.channel = midievent->midiData[0] & 0x0F;
  26. 	tmp.data1   = midievent->midiData[1];
  27. 	tmp.data2   = midievent->midiData[2];
  28.  
  29. 	return addMidiMsg(tmp);
  30. }
  31.  
  32. int CMidiMsg::addMidiMsg(MidiMessage msg)
  33. {
  34. 	// バッファがいっぱいなら0を返す
  35. 	if (num >= MIDIMSG_MAXNUM)
  36. 		return 0;
  37.  
  38. 	buf[num] = msg;
  39.  
  40. 	num++;
  41. 	if (num > MIDIMSG_MAXNUM) {num = MIDIMSG_MAXNUM;}
  42.  
  43. 	return 1;
  44. };
  45.  
  46. MidiMessage CMidiMsg::getMidiMsg()
  47. {
  48. 	MidiMessage tmp = buf[cur];
  49.  
  50. 	num--;
  51. 	if( num < 0) { num = 0; }
  52.  
  53. 	cur++;
  54. 	if( cur >= MIDIMSG_MAXNUM) { cur = MIDIMSG_MAXNUM -1;}
  55.  
  56. 	return tmp;
  57. }
  58.  
  59. VstInt32 CMidiMsg::getMidiMessageNum()
  60. {
  61. 	return num;
  62. }
  63.  
  64. VstInt32 CMidiMsg::getNextDeltaFrames()
  65. {
  66. 	return buf[cur].deltaFrames;
  67. }
  68.  
  69.  
  70. void CMidiMsg::midiProc(MidiMessage mididata)
  71. {
  72. 	short msb = 0;
  73. 	short lsb = 0;
  74. 	short pitchbend = 0;
  75.  
  76. 	switch (mididata.message & 0xF0)
  77. 	{
  78. 	case 0x80: // ノートオフメッセージ
  79. 		onMidiKeyOff(mididata.channel, mididata.data1, mididata.data2);
  80. 		break;
  81.  
  82. 	case 0x90: // ノートオンメッセージ
  83. 		// ヴェロシティが0の場合はノートオフメッセージとして扱う
  84. 		if (mididata.data2 > 0)
  85. 		{
  86. 			onMidiKeyOn(mididata.channel, mididata.data1, mididata.data2);
  87. 		}
  88. 		else
  89. 		{
  90. 			onMidiKeyOff(mididata.channel, mididata.data1, mididata.data2);
  91. 		}
  92. 		break;
  93.  
  94. 	case 0xA0: // キープレッシャーメッセージ
  95. 		onMidiPoliKeyPress(mididata.channel, mididata.data1, mididata.data2);
  96. 		break;
  97.  
  98. 	case 0xB0: // コントロールチェンジメッセージ
  99. 		onMidiControlChange(mididata.channel, mididata.data1, mididata.data2);
  100. 		break;
  101.  
  102. 	case 0xC0: // プログラムチェンジメッセージ
  103. 		onMidiProgramChange(mididata.channel, mididata.data1);
  104. 		break;
  105.  
  106. 	case 0xD0: // チャンネルプレッシャーメッセージ
  107. 		onMidiChannelPress(mididata.channel, mididata.data1);
  108. 		break;
  109.  
  110. 	case 0xE0: // ピッチベンドメッセージ
  111. 		lsb = (mididata.data1);
  112. 		msb = (mididata.data2);
  113. 		pitchbend = ((msb << 7) | lsb) - 8192;
  114. 		onMidiPitchBend(mididata.channel, pitchbend);
  115. 		break;
  116.  
  117. 	case 0xF0: // システムメッセージ
  118. 		onMidiSystemMessage((mididata.message & 0xF0) | (mididata.channel & 0x0F), mididata.data1, mididata.data2);
  119. 		break;
  120. 	}
  121. }
  122.  
  123. void CMidiMsg::onMidiSystemMessage(unsigned char systemmsg, unsigned char data1, unsigned char data2)
  124. {
  125.  
  126. 	short lsb = (data1);
  127. 	short msb = (data2);
  128. 	switch(systemmsg)
  129. 	{
  130. 		case 0xF1: onMidiQuarterFrame(data1); break;
  131. 		case 0xF2: onMidiSongPointer( (msb << 7) | lsb );  break;
  132. 		case 0xF3: onMidiSongSelect(data1); break;
  133. 		case 0xF6: onMidiChainRequest();    break;
  134. 		case 0xF8: onMidiTimingClock();     break;
  135. 		case 0xFA: onMidiStart();           break;
  136. 		case 0xFB: onMidiContinue();        break;
  137. 		case 0xFC: onMidiStop();            break;
  138. 		case 0xFE: onMidiActiveSensing();   break;
  139. 		case 0xFF: onMidiSystemReset();     break;
  140. 		default:   break;
  141. 	}
  142. }
  143.  
  144. void CMidiMsg::onMidiControlChange(unsigned char channel, unsigned char cc, unsigned char value)
  145. {
  146. 	switch(cc)
  147. 	{
  148. 	case   0:  onMidiCC000 (channel, value); break;
  149. 	case   1:  onMidiCC001 (channel, value); break;
  150. 	case   2:  onMidiCC002 (channel, value); break;
  151. 	case   3:  onMidiCC003 (channel, value); break;
  152. 	case   4:  onMidiCC004 (channel, value); break;
  153. 	case   5:  onMidiCC005 (channel, value); break;
  154. 	case   6:  onMidiCC006 (channel, value); break;
  155. 	case   7:  onMidiCC007 (channel, value); break;
  156. 	case   8:  onMidiCC008 (channel, value); break;
  157. 	case   9:  onMidiCC009 (channel, value); break;
  158. 	case  10:  onMidiCC010 (channel, value); break;
  159. 	case  11:  onMidiCC011 (channel, value); break;
  160. 	case  12:  onMidiCC012 (channel, value); break;
  161. 	case  13:  onMidiCC013 (channel, value); break;
  162. 	case  14:  onMidiCC014 (channel, value); break;
  163. 	case  15:  onMidiCC015 (channel, value); break;
  164. 	case  16:  onMidiCC016 (channel, value); break;
  165. 	case  17:  onMidiCC017 (channel, value); break;
  166. 	case  18:  onMidiCC018 (channel, value); break;
  167. 	case  19:  onMidiCC019 (channel, value); break;
  168. 	case  20:  onMidiCC020 (channel, value); break;
  169. 	case  21:  onMidiCC021 (channel, value); break;
  170. 	case  22:  onMidiCC022 (channel, value); break;
  171. 	case  23:  onMidiCC023 (channel, value); break;
  172. 	case  24:  onMidiCC024 (channel, value); break;
  173. 	case  25:  onMidiCC025 (channel, value); break;
  174. 	case  26:  onMidiCC026 (channel, value); break;
  175. 	case  27:  onMidiCC027 (channel, value); break;
  176. 	case  28:  onMidiCC028 (channel, value); break;
  177. 	case  29:  onMidiCC029 (channel, value); break;
  178. 	case  30:  onMidiCC030 (channel, value); break;
  179. 	case  31:  onMidiCC031 (channel, value); break;
  180. 	case  32:  onMidiCC032 (channel, value); break;
  181. 	case  33:  onMidiCC033 (channel, value); break;
  182. 	case  34:  onMidiCC034 (channel, value); break;
  183. 	case  35:  onMidiCC035 (channel, value); break;
  184. 	case  36:  onMidiCC036 (channel, value); break;
  185. 	case  37:  onMidiCC037 (channel, value); break;
  186. 	case  38:  onMidiCC038 (channel, value); break;
  187. 	case  39:  onMidiCC039 (channel, value); break;
  188. 	case  40:  onMidiCC040 (channel, value); break;
  189. 	case  41:  onMidiCC041 (channel, value); break;
  190. 	case  42:  onMidiCC042 (channel, value); break;
  191. 	case  43:  onMidiCC043 (channel, value); break;
  192. 	case  44:  onMidiCC044 (channel, value); break;
  193. 	case  45:  onMidiCC045 (channel, value); break;
  194. 	case  46:  onMidiCC046 (channel, value); break;
  195. 	case  47:  onMidiCC047 (channel, value); break;
  196. 	case  48:  onMidiCC048 (channel, value); break;
  197. 	case  49:  onMidiCC049 (channel, value); break;
  198. 	case  50:  onMidiCC050 (channel, value); break;
  199. 	case  51:  onMidiCC051 (channel, value); break;
  200. 	case  52:  onMidiCC052 (channel, value); break;
  201. 	case  53:  onMidiCC053 (channel, value); break;
  202. 	case  54:  onMidiCC054 (channel, value); break;
  203. 	case  55:  onMidiCC055 (channel, value); break;
  204. 	case  56:  onMidiCC056 (channel, value); break;
  205. 	case  57:  onMidiCC057 (channel, value); break;
  206. 	case  58:  onMidiCC058 (channel, value); break;
  207. 	case  59:  onMidiCC059 (channel, value); break;
  208. 	case  60:  onMidiCC060 (channel, value); break;
  209. 	case  61:  onMidiCC061 (channel, value); break;
  210. 	case  62:  onMidiCC062 (channel, value); break;
  211. 	case  63:  onMidiCC063 (channel, value); break;
  212. 	case  64:  onMidiCC064 (channel, value); break;
  213. 	case  65:  onMidiCC065 (channel, value); break;
  214. 	case  66:  onMidiCC066 (channel, value); break;
  215. 	case  67:  onMidiCC067 (channel, value); break;
  216. 	case  68:  onMidiCC068 (channel, value); break;
  217. 	case  69:  onMidiCC069 (channel, value); break;
  218. 	case  70:  onMidiCC070 (channel, value); break;
  219. 	case  71:  onMidiCC071 (channel, value); break;
  220. 	case  72:  onMidiCC072 (channel, value); break;
  221. 	case  73:  onMidiCC073 (channel, value); break;
  222. 	case  74:  onMidiCC074 (channel, value); break;
  223. 	case  75:  onMidiCC075 (channel, value); break;
  224. 	case  76:  onMidiCC076 (channel, value); break;
  225. 	case  77:  onMidiCC077 (channel, value); break;
  226. 	case  78:  onMidiCC078 (channel, value); break;
  227. 	case  79:  onMidiCC079 (channel, value); break;
  228. 	case  80:  onMidiCC080 (channel, value); break;
  229. 	case  81:  onMidiCC081 (channel, value); break;
  230. 	case  82:  onMidiCC082 (channel, value); break;
  231. 	case  83:  onMidiCC083 (channel, value); break;
  232. 	case  84:  onMidiCC084 (channel, value); break;
  233. 	case  85:  onMidiCC085 (channel, value); break;
  234. 	case  86:  onMidiCC086 (channel, value); break;
  235. 	case  87:  onMidiCC087 (channel, value); break;
  236. 	case  88:  onMidiCC088 (channel, value); break;
  237. 	case  89:  onMidiCC089 (channel, value); break;
  238. 	case  90:  onMidiCC090 (channel, value); break;
  239. 	case  91:  onMidiCC091 (channel, value); break;
  240. 	case  92:  onMidiCC092 (channel, value); break;
  241. 	case  93:  onMidiCC093 (channel, value); break;
  242. 	case  94:  onMidiCC094 (channel, value); break;
  243. 	case  95:  onMidiCC095 (channel, value); break;
  244. 	case  96:  onMidiCC096 (channel, value); break;
  245. 	case  97:  onMidiCC097 (channel, value); break;
  246. 	case  98:  onMidiCC098 (channel, value); break;
  247. 	case  99:  onMidiCC099 (channel, value); break;
  248. 	case 100:  onMidiCC100 (channel, value); break;
  249. 	case 101:  onMidiCC101 (channel, value); break;
  250. 	case 102:  onMidiCC102 (channel, value); break;
  251. 	case 103:  onMidiCC103 (channel, value); break;
  252. 	case 104:  onMidiCC104 (channel, value); break;
  253. 	case 105:  onMidiCC105 (channel, value); break;
  254. 	case 106:  onMidiCC106 (channel, value); break;
  255. 	case 107:  onMidiCC107 (channel, value); break;
  256. 	case 108:  onMidiCC108 (channel, value); break;
  257. 	case 109:  onMidiCC109 (channel, value); break;
  258. 	case 110:  onMidiCC110 (channel, value); break;
  259. 	case 111:  onMidiCC111 (channel, value); break;
  260. 	case 112:  onMidiCC112 (channel, value); break;
  261. 	case 113:  onMidiCC113 (channel, value); break;
  262. 	case 114:  onMidiCC114 (channel, value); break;
  263. 	case 115:  onMidiCC115 (channel, value); break;
  264. 	case 116:  onMidiCC116 (channel, value); break;
  265. 	case 117:  onMidiCC117 (channel, value); break;
  266. 	case 118:  onMidiCC118 (channel, value); break;
  267. 	case 119:  onMidiCC119 (channel, value); break;
  268. 	case 120:  onMidiCC120 (channel, value); break;
  269. 	case 121:  onMidiCC121 (channel, value); break;
  270. 	case 122:  onMidiCC122 (channel, value); break;
  271. 	case 123:  onMidiCC123 (channel, value); break;
  272. 	case 124:  onMidiCC124 (channel, value); break;
  273. 	case 125:  onMidiCC125 (channel, value); break;
  274. 	case 126:  onMidiCC126 (channel, value); break;
  275. 	case 127:  onMidiCC127 (channel, value); break;
  276. 	default:   break;
  277. 	}
  278. }

【MyMidiSample2VST.cpp】 
  1. // ============================================================================================
  2. // インクルードファイル
  3. // ============================================================================================
  4. #include <stdlib.h>
  5. #include "audioeffectx.h"
  6.  
  7. #include "CMidiMsg.h"
  8.  
  9. // ============================================================================================
  10. // 設計情報の記入
  11. // ============================================================================================
  12. #define MY_VST_INPUT_NUM   2 //入力数。モノラル入力=1、ステレオ入力=2
  13. #define MY_VST_OUTPUT_NUM  2 //出力数。モノラル出力=1、ステレオ出力=2
  14.  
  15. #define MY_VST_UNIQUE_ID  'SMPL' //ユニークID
  16.                                  //公開する場合は以下URLで発行されたユニークIDを入力する。
  17.                                  //http://ygrabit.steinberg.de/~ygrabit/public_html/index.html
  18.  
  19. #define MY_VST_PRESET_NUM    1 //プリセットプログラムの数
  20. #define MY_VST_PARAMETER_NUM 0 //パラメータの数
  21.  
  22. // ============================================================================================
  23. // VSTの基本となるクラス
  24. // ============================================================================================
  25. class MyMidiSample2VST : public AudioEffectX , public CMidiMsg
  26. {
  27. protected:
  28. 	float volume;
  29. public:
  30. 	MyMidiSample2VST (audioMasterCallback audioMaster);
  31.  
  32. 	// 音声信号を処理するメンバー関数
  33. 	virtual void processReplacing (float** inputs, float** outputs, VstInt32 sampleFrames);
  34.  
  35. 	// MIDIメッセージをホストアプリケーションから受け取るためのメンバー関数
  36. 	VstInt32 processEvents (VstEvents* events);
  37.  
  38.  
  39. 	void onMidiCC007(unsigned char channel, unsigned char value);
  40. };
  41.  
  42. // ============================================================================================
  43. // このVSTのを生成するための関数
  44. // ============================================================================================
  45. AudioEffect* createEffectInstance (audioMasterCallback audioMaster)
  46. {
  47. 	//newでこのVSTを生成したポインタを返す
  48. 	return new MyMidiSample2VST (audioMaster);
  49. }
  50.  
  51. MyMidiSample2VST::MyMidiSample2VST (audioMasterCallback audioMaster)
  52. : AudioEffectX (audioMaster, MY_VST_PRESET_NUM, MY_VST_PARAMETER_NUM)
  53. {
  54. 	//VSTの初期化を行う。
  55.  
  56. 	//以下の関数を呼び出して入力数、出力数等の情報を設定する。
  57. 	//必ず呼び出さなければならない。
  58. 	setNumInputs (MY_VST_INPUT_NUM);    //入力数の設定
  59. 	setNumOutputs (MY_VST_OUTPUT_NUM);  //出力数の設定
  60. 	setUniqueID (MY_VST_UNIQUE_ID);     //ユニークIDの設定
  61.  
  62. 	isSynth (true);          //このVSTがSynthかどうかのフラグを設定。
  63. 	                         //Synthの場合…true、Effectorの場合…false
  64.  
  65. 	canProcessReplacing ();  //このVSTが音声処理可能かどうかのフラグを設定。
  66. 	                         //音声処理を行わないVSTはないので必ずこの関数を呼び出す。
  67.  
  68. 	//上記の関数を呼び出した後に初期化を行う
  69. 	volume = 1.0f;
  70. }
  71.  
  72. void MyMidiSample2VST::processReplacing (float** inputs, float** outputs, VstInt32 sampleFrames)
  73. {
  74. 	//入力、出力は2次元配列で渡される。
  75. 	//入力は-1.0f～1.0fの間で渡される。
  76. 	//出力は-1.0f～1.0fの間で書き込む必要がある。
  77. 	//sampleFramesが処理するバッファのサイズ
  78. 	float* outL = outputs[0]; //出力 左用
  79. 	float* outR = outputs[1]; //出力 右用
  80.  
  81. 	for (int i = 0; i < sampleFrames; i++)
  82. 	{
  83. 		//ここで音声処理を行う。
  84.  
  85. 		// MIDIメッセージがあるか確認
  86. 		if ( getMidiMessageNum() > 0)
  87. 		{
  88. 			// MIDIメッセージを処理するタイミングかどうかを確認する。
  89. 			if( getNextDeltaFrames() <= i)
  90. 			{
  91. 				// MIDIメッセージをバッファから取り出し処理する
  92. 				midiProc( getMidiMsg() );
  93. 			}
  94. 		}
  95.  
  96. 		//出力バッファへ書き込む。
  97. 		outL[i] = volume * (float)((rand() % 256) -128) / 255.0f;
  98. 		outR[i] = volume * (float)((rand() % 256) -128) / 255.0f;
  99. 	}
  100. }
  101.  
  102. // MIDIメッセージを処理するメンバー関数
  103. // processReplacing()の前に必ず1度だけ呼び出される。
  104. // 
  105. VstInt32 MyMidiSample2VST::processEvents (VstEvents* events)
  106. {
  107. 	// MIDIのリストを初期化します。
  108. 	clearMidiMsg();
  109.  
  110. 	int loops = (events->numEvents);
  111.  
  112. 	// VSTイベントの回数だけループをまわす。
  113. 	for (int i = 0;i < loops; i++)
  114. 	{
  115. 		// 与えられたイベントがMIDIならばmidimsgbufにストックする
  116. 		if ((events->events[i])->type == kVstMidiType)
  117. 		{
  118. 			VstMidiEvent *midievent = (VstMidiEvent*)(events->events[i]);
  119. 			if( !addMidiMsg(midievent) )
  120. 			{
  121. 				break;
  122. 			}
  123. 		}
  124. 	}
  125.  
  126. 	//　1を返さなければならない
  127. 	return 1;
  128. }
  129.  
  130. // 
  131. // onMidiCC007()関数をオーバーライドして、MIDI CC7の場合の動作を定義する。
  132. // ここではチャンネルに関係なく、MIDI CC7メッセージを受け取るとノイズのボリュームを
  133. // 変更するようにしている。
  134. void MyMidiSample2VST::onMidiCC007 (unsigned char channel, unsigned char value)
  135. {
  136. 	volume = (float)(value) / 127.0f;
  137. }


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最終更新：2013年08月06日 03:08