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cmMidiFile.h/c : Added cmMidiFileGenPlotFile().

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This commit is contained in:
kevin 2016-03-31 19:06:20 -04:00
parent a669e8bca3
commit 7f84595d08
2 changed files with 39 additions and 0 deletions
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35
cmMidiFile.c
View File

@ -1453,6 +1453,41 @@ bool cmMidiFileIsNull( cmMidiFileH_t h )
void cmMidiFileTestPrint( void* printDataPtr, const char* fmt, va_list vl )
{ vprintf(fmt,vl); }
cmMfRC_t cmMidiFileGenPlotFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmChar_t* outFn )
{
cmMfRC_t rc = kOkMfRC;
cmMidiFileH_t mfH = cmMidiFileNullHandle;
cmFileH_t fH = cmFileNullHandle;
unsigned i = 0;
const cmMidiTrackMsg_t** m = NULL;
unsigned mN = 0;
if((rc = cmMidiFileOpen(ctx, &mfH, midiFn )) != kOkMfRC )
return cmErrMsg(&ctx->err,rc,"The MIDI file object could not be opened from '%s'.",cmStringNullGuard(midiFn));
_cmMidiFile_t* p = _cmMidiFileHandleToPtr(mfH);
if( (m = cmMidiFileMsgArray(mfH)) == NULL || (mN = cmMidiFileMsgCount(mfH)) == 0 )
{
rc = cmErrMsg(&p->err,kFileFailMfRC,"The MIDI file object appears to be empty.");
goto errLabel;
}
cmMidiFileCalcNoteDurations( mfH );
if( cmFileOpen(&fH,outFn,kWriteFileFl,p->err.rpt) != kOkFileRC )
return cmErrMsg(&p->err,kFileFailMfRC,"Unable to create the file '%s'.",cmStringNullGuard(outFn));
for(i=0; i<mN; ++i)
if( (m[i]!=NULL) && cmMidiIsChStatus(m[i]->status) && cmMidiIsNoteOn(m[i]->status) && (m[i]->u.chMsgPtr->d1>0) )
cmFilePrintf(fH,"n %f %f %i %s\n",m[i]->amicro/1000000.0,m[i]->u.chMsgPtr->durMicros/1000000.0,m[i]->uid,cmMidiToSciPitch(m[i]->u.chMsgPtr->d0,NULL,0));
errLabel:
cmMidiFileClose(&mfH);
cmFileClose(&fH);
return rc;
}
void cmMidiFilePrintControlNumbers( cmCtx_t* ctx, const char* fn )
{

4
cmMidiFile.h
View File

@ -172,6 +172,10 @@ extern "C" {
bool cmMidiFileIsNull( cmMidiFileH_t h );
void cmMidiFileTest( const char* fn, cmCtx_t* ctx );
// Generate a piano-roll plot description file which can be displayed with cmXScore.m
cmMfRC_t cmMidiFileGenPlotFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmChar_t* outFn );
//)
#ifdef __cplusplus