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cmMidiFile.h/c : Added cmMidiFileGenSvgFile()

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This commit is contained in:
kevin 2016-09-14 18:11:30 -04:00
parent 88fdfd998d
commit a37e2e2c71
2 changed files with 104 additions and 2 deletions
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96
cmMidiFile.c
View File

@ -8,8 +8,11 @@
#include "cmMallocDebug.h"
#include "cmLinkedHeap.h"
#include "cmTime.h"
#include "cmText.h"
#include "cmMidi.h"
#include "cmMidiFile.h"
#include "cmSvgWriter.h"
#ifdef cmBIG_ENDIAN
#define mfSwap16(v) (v)
@ -1975,6 +1978,99 @@ cmMfRC_t cmMidiFileGenPlotFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmCh
return rc;
}
cmMfRC_t cmMidiFileGenSvgFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmChar_t* outSvgFn, const cmChar_t* cssFn )
{
cmMfRC_t rc = kOkMfRC;
cmSvgH_t svgH = cmSvgNullHandle;
cmMidiFileH_t mfH = cmMidiFileNullHandle;
unsigned msgN = 0;
const cmMidiTrackMsg_t** msgs = NULL;
unsigned noteHeight = 10;
double micros_per_sec = 1000.0;
unsigned i;
if((rc = cmMidiFileOpen(ctx,&mfH,midiFn)) != kOkMfRC )
{
rc = cmErrMsg(&ctx->err,rc,"Unable to open the MIDI file '%s'.",cmStringNullGuard(midiFn));
goto errLabel;
}
cmMidiFileCalcNoteDurations( mfH );
msgN = cmMidiFileMsgCount(mfH);
msgs = cmMidiFileMsgArray(mfH);
if( cmSvgWriterAlloc(ctx,&svgH) != kOkSvgRC )
{
rc = cmErrMsg(&ctx->err,kSvgFailMfRC,"Unable to create the MIDI SVG output file '%s'.",cmStringNullGuard(outSvgFn));
goto errLabel;
}
for(i=0; i<msgN && rc==kOkMfRC; ++i)
if( msgs[i]->status == kNoteOnMdId && msgs[i]->u.chMsgPtr->d1 > 0 )
{
const cmMidiTrackMsg_t* m = msgs[i];
if( cmSvgWriterRect(svgH, m->amicro/micros_per_sec, m->u.chMsgPtr->d0 * noteHeight, m->u.chMsgPtr->durMicros/micros_per_sec, noteHeight-1, "note" ) != kOkSvgRC )
rc = kSvgFailMfRC;
const cmChar_t* t0 = cmMidiToSciPitch(m->u.chMsgPtr->d0,NULL,0);
if( cmSvgWriterText(svgH, (m->amicro + (m->u.chMsgPtr->durMicros/2)) / micros_per_sec, m->u.chMsgPtr->d0 * noteHeight, t0, "text" ) != kOkSvgRC )
rc = kSvgFailMfRC;
}
if( rc != kOkMfRC )
{
cmErrMsg(&ctx->err,rc,"SVG Shape insertion failed.");
goto errLabel;
}
unsigned dN = 0;
cmMidiFileDensity_t* dV = cmMidiFileNoteDensity( mfH, &dN );
double t0 = 0;
double y0 = 64.0;
cmChar_t* tx = NULL;
for(i=0; i<dN; ++i)
{
const cmMidiTrackMsg_t* m;
if((m = _cmMidiFileUidToMsg( _cmMidiFileHandleToPtr(mfH), dV[i].uid )) == NULL )
rc = cmErrMsg(&ctx->err,kUidNotFoundMfRC,"The MIDI msg form UID:%i was not found.",dV[i].uid);
else
{
double t1 = m->amicro / micros_per_sec;
double y1 = dV[i].density * noteHeight;
cmSvgWriterLine(svgH, t0, y0, t1, y1, "density" );
cmSvgWriterText(svgH, t1, y1, tx = cmTsPrintfP(tx,"%i",dV[i].density),"dtext");
t0 = t1;
y0 = y1;
}
}
cmMemFree(dV);
cmMemFree(tx);
if( rc == kOkMfRC )
if( cmSvgWriterWrite(svgH,cssFn,outSvgFn) != kOkSvgRC )
rc = cmErrMsg(&ctx->err,kSvgFailMfRC,"SVG file write to '%s' failed.",cmStringNullGuard(outSvgFn));
errLabel:
cmMidiFileClose(&mfH);
cmSvgWriterFree(&svgH);
return rc;
}
void cmMidiFilePrintControlNumbers( cmCtx_t* ctx, const char* fn )
{
cmMidiFileH_t h = cmMidiFileNullHandle;

10
cmMidiFile.h
View File

@ -117,7 +117,8 @@ extern "C" {
kLargeDeltaTickMfRC, // 12 (a large delta tick value was filtered)
kUidNotFoundMfRC, // 13
kUidNotANoteMsgMfRC, // 14
kInvalidTrkIndexMfRC // 15
kInvalidTrkIndexMfRC,// 15
kSvgFailMfRC // 16
};
extern cmMidiFileH_t cmMidiFileNullHandle;
@ -220,11 +221,16 @@ extern "C" {
unsigned density;
} cmMidiFileDensity_t;
cmMidiFileDensity_t* cmMidiFileNoteTimeDensity( cmMidiFileH_t h, unsigned* cntRef );
// Generate the note onset density measure for each note in the MIDI file.
// Delete the returned memory with a call to cmMemFree().
cmMidiFileDensity_t* cmMidiFileNoteDensity( cmMidiFileH_t h, unsigned* cntRef );
// 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 );
cmMfRC_t cmMidiFileGenSvgFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmChar_t* outSvgFn, const cmChar_t* cssFn );
void cmMidiFileTest( const char* fn, cmCtx_t* ctx );