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cwMidiFile.h/cpp : Added open_csv().

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This commit is contained in:
kevin 2024-07-03 14:29:04 -04:00
parent 8a01b8131f
commit e4d67e2bdb
2 changed files with 118 additions and 5 deletions
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117
cwMidiFile.cpp
View File

@ -9,6 +9,7 @@
#include "cwMidi.h"
#include "cwMidiFile.h"
#include "cwText.h"
#include "cwCsv.h"
#ifdef cwBIG_ENDIAN
#define mfSwap16(v) (v)
@ -684,6 +685,14 @@ namespace cw
}
void _init( file_t* p, unsigned trkN, unsigned ticksPerQN )
{
p->ticksPerQN = ticksPerQN;
p->fmtId = 1;
p->trkN = trkN;
p->trkV = mem::allocZ<track_t>(p->trkN);
}
rc_t _write8( file_t* mfp, unsigned char v )
{
rc_t rc = kOkRC;
@ -1309,19 +1318,116 @@ cw::rc_t cw::midi::file::open( handle_t& hRef, const char* fn ){
return rc;
}
cw::rc_t cw::midi::file::open_csv( handle_t& hRef, const char* csv_fname )
{
rc_t rc = kOkRC;
csv::handle_t csvH;
const char* titleA[] = { "uid","tpQN","bpm","dticks","ch","status","d0","d1" };
unsigned titleN = sizeof(titleA)/sizeof(titleA[0]);
unsigned TpQN = 1260;
unsigned BpM = 60;
unsigned lineN = 0;
unsigned line_idx = 0;
double asecs = 0;
unsigned uid = kInvalidId;
unsigned dtick = 0;
unsigned ch = 0;
unsigned status = 0;
unsigned d0 = 0;
unsigned d1 = 0;
file_t* p = nullptr;
unsigned aticks = 0;
if((rc = _create(hRef)) != kOkRC )
goto errLabel;
if((p = _handleToPtr(hRef)) == nullptr )
goto errLabel;
if((rc = csv::create(csvH,csv_fname,titleA,titleN)) != kOkRC )
{
rc = cwLogError(rc,"MIDI CSV file open failed.");
goto errLabel;
}
if((rc = line_count(csvH,lineN)) != kOkRC )
{
rc = cwLogError(rc,"MIDI CSV line count access failed.");
goto errLabel;
}
for(; (rc = next_line(csvH)) == kOkRC; ++line_idx )
{
if((rc = getv(csvH,"uid",uid,"tpQN",TpQN,"bpm",BpM,"dticks",dtick,"ch",ch,"status",status,"d0",d0,"d1",d1)) != kOkRC )
{
cwLogError(rc,"Error reading CSV line %i.",line_idx+1);
goto errLabel;
}
//printf("%i %i tpqn:%i bpm:%i dtick:%i ch:%i st:%i d0:%i d1:%i\n",line_idx,uid,TpQN,BpM,dtick,ch,status,d0,d1);
double ticks_per_sec = TpQN * BpM / 60;
double dsecs = dtick * ticks_per_sec;
asecs += dsecs;
if( line_idx == 0 )
_init(p,1,TpQN);
aticks += dtick;
if( BpM != 0 )
{
if((rc = insertTrackTempoMsg(hRef, 0, aticks, BpM )) != kOkRC )
{
rc = cwLogError(rc,"BPM insert failed.");
goto errLabel;
}
}
if( status != 0 )
{
if((rc = insertTrackChMsg(hRef, 0, aticks, ch+status, d0, d1 )) != kOkRC )
{
rc = cwLogError(rc,"Channel msg insert failed.");
goto errLabel;
}
}
TpQN = 0;
BpM = 0;
}
if( rc == kEofRC )
rc = kOkRC;
errLabel:
if( rc != kOkRC )
close(hRef);
destroy(csvH);
return rc;
}
cw::rc_t cw::midi::file::create( handle_t& hRef, unsigned trkN, unsigned ticksPerQN )
{
rc_t rc = kOkRC;
if((rc = _create(hRef)) != kOkRC )
return rc;
file_t* p = _handleToPtr(hRef);
p->ticksPerQN = ticksPerQN;
p->fmtId = 1;
p->trkN = trkN;
p->trkV = mem::allocZ<track_t>(p->trkN);
_init(p,trkN,ticksPerQN);
return rc;
}
@ -2548,6 +2654,7 @@ cw::rc_t cw::midi::file::test( const object_t* cfg )
if( textIsEqual(o->pair_label(),"rpt_beg_end") )
rc = _testRptBeginEnd(o->pair_value());
}
}

6
cwMidiFile.h
View File

@ -114,6 +114,12 @@ namespace cw
// Read a MIDI file.
rc_t open( handle_t& hRef, const char* fn );
// Read from a CSV.
// Columns: "uid","tpQN","bpm","dticks","ch","status","d0","d1"
// tpQN = ticks per quarter note should be given on the first line. (Defaults to 1260).
// bpm = beats per minute should be given on the first line. (Defaults to 60).
rc_t open_csv( handle_t& hRef, const char* csv_fname );
// Create an empty MIDI file object.
rc_t create( handle_t& hRef, unsigned trkN, unsigned ticksPerQN );