fixed CPOF midi functions

Author: vlazzarini

include/plugin.h

@@ -139,44 +139,47 @@ class Csound : CSOUND {
     return !std::strcmp(GetTypeForArg(arg)->varTypeName, "a");
   }
 
-      /** midi channel number for this instrument
+  /** midi channel number for this instrument
    */
-  int midi_channel() { return GetMidiChannelNumber(this); }
+  int midi_channel(OPDS *p) { return GetMidiChannelNumber(p); }
 
   /** midi note number for this instrument
    */
-  int midi_note_num() { return GetMidiNoteNumber(this); }
+  int midi_note_num(OPDS *p) { return GetMidiNoteNumber(p); }
 
   /** midi note velocity for this instrument
    */
-  int midi_note_vel() { return GetMidiVelocity(this); }
+  int midi_note_vel(OPDS *p) { return GetMidiVelocity(p); }
 
   /** midi aftertouch for this channel
    */
-  MYFLT midi_chn_aftertouch() { return GetMidiChannel(this)->aftouch; }
+  MYFLT midi_chn_aftertouch(OPDS *p) {
+    return GetMidiChannel(p)->aftouch; }
 
   /** midi poly aftertouch for this channel
    */
-  MYFLT midi_chn_polytouch(uint32_t note) {
-    return GetMidiChannel(this)->polyaft[note];
+  MYFLT midi_chn_polytouch(OPDS *p, uint32_t note) {
+    return GetMidiChannel(p)->polyaft[note];
   }
 
   /** midi ctl change for this channel
    */
-  MYFLT midi_chn_ctl(uint32_t ctl) {
-    return GetMidiChannel(this)->ctl_val[ctl];
+  MYFLT midi_chn_ctl(OPDS *p, uint32_t ctl) {
+    return GetMidiChannel(p)->ctl_val[ctl];
   }
 
   /** midi pitchbend for this channel
    */
-  MYFLT midi_chn_pitchbend() { return GetMidiChannel(this)->pchbend; }
+  MYFLT midi_chn_pitchbend() {
+    return GetMidiChannel(p)->pchbend;
+  }
 
   /** list of active instrument instances for this channel \n
       returns an INSDS array with 128 items, one per
       MIDI note number. Inactive instances are marked NULL.
    */
-  const INSDS *midi_chn_list() {
-    return (const INSDS *)GetMidiChannel(this)->kinsptr;
+  const INSDS *midi_chn_list(OPDS *p) {
+    return GetMidiChannel(p)->kinsptr;
   }
 
   /** deinit registration for a given plugin class