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cmMidiFile.h/c : Added cmMidiFileSetVelocity().

master
kevin 8 years ago
parent
commit
bdc1bdb61c
2 changed files with 38 additions and 1 deletions
  1. 32
    0
      cmMidiFile.c
  2. 6
    1
      cmMidiFile.h

+ 32
- 0
cmMidiFile.c View File

@@ -1109,6 +1109,38 @@ const cmMidiTrackMsg_t** cmMidiFileMsgArray(    cmMidiFileH_t h )
1109 1109
   return (const cmMidiTrackMsg_t**)mfp->msgV;
1110 1110
 }
1111 1111
 
1112
+
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+cmMidiTrackMsg_t*  _cmMidiFileUidToMsg( _cmMidiFile_t* mfp, unsigned uid )
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+{
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+  unsigned i;
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+
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+  for(i=0; i<mfp->msgN; ++i)
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+    if( mfp->msgV[i]->uid == uid )
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+      return mfp->msgV[i];
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+
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+  return NULL;
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+}
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+
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+cmMfRC_t cmMidiFileSetVelocity( cmMidiFileH_t h, unsigned uid, cmMidiByte_t vel )
1125
+{
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+  cmMidiTrackMsg_t* r;
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+  _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
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+
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+  assert( mfp != NULL );
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+
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+  if((r = _cmMidiFileUidToMsg(mfp,uid)) == NULL )
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+    return cmErrMsg(&mfp->err,kUidNotFoundMfRC,"The MIDI file uid %i could not be found.",uid);
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+
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+  if( cmMidiIsNoteOn(r->status)==false && cmMidiIsNoteOff(r->status,0)==false )
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+    return cmErrMsg(&mfp->err,kUidNotANoteMsgMfRC,"Cannot set velocity on a non-Note-On/Off msg.");
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+  
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+  cmMidiChMsg_t* chm = (cmMidiChMsg_t*)r->u.chMsgPtr;
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+
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+  chm->d1 = vel;
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+
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+  return kOkMfRC;
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+}
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+
1112 1144
 unsigned  cmMidiFileSeekUsecs( cmMidiFileH_t h, unsigned long long offsUSecs, unsigned* msgUsecsPtr, unsigned* microsPerTickPtr )
1113 1145
 {
1114 1146
   _cmMidiFile_t* p;

+ 6
- 1
cmMidiFile.h View File

@@ -111,7 +111,9 @@ extern "C" {
111 111
     kInvalidStatusMfRC,  //  9
112 112
     kSustainPedalMfRC,   // 10
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     kSostenutoPedalMfRC, // 11
114
-    kLargeDeltaTickMfRC  // 12 (a large delta tick value was filtered)
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+    kLargeDeltaTickMfRC, // 12 (a large delta tick value was filtered)
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+    kUidNotFoundMfRC,    // 13
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+    kUidNotANoteMsgMfRC  // 14
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   };
116 118
 
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   extern cmMidiFileH_t cmMidiFileNullHandle;
@@ -156,6 +158,9 @@ extern "C" {
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   // Returns NULL if 'h' is invalid.
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   const cmMidiTrackMsg_t** cmMidiFileMsgArray( cmMidiFileH_t h );
158 160
 
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+  // Set the velocity of a note-on/off msg identified by 'uid'.
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+  cmMfRC_t             cmMidiFileSetVelocity( cmMidiFileH_t h, unsigned uid, cmMidiByte_t vel );
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+
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   // Return a pointer to the first msg at or after 'usecsOffs' or kInvalidIdx if no
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   // msg exists after 'usecsOffs'.  Note that 'usecOffs' is an offset from the beginning
161 166
   // of the file.

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