libcm is a C development framework with an emphasis on audio signal processing applications.
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cmMidiFile.c 50KB

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  1. #include "cmPrefix.h"
  2. #include "cmGlobal.h"
  3. #include "cmRpt.h"
  4. #include "cmErr.h"
  5. #include "cmCtx.h"
  6. #include "cmFile.h"
  7. #include "cmMem.h"
  8. #include "cmMallocDebug.h"
  9. #include "cmLinkedHeap.h"
  10. #include "cmTime.h"
  11. #include "cmMidi.h"
  12. #include "cmMidiFile.h"
  13. #ifdef cmBIG_ENDIAN
  14. #define mfSwap16(v) (v)
  15. #define mfSwap32(v) (v)
  16. #else
  17. #define mfSwap16(v) cmSwap16(v)
  18. #define mfSwap32(v) cmSwap32(v)
  19. #endif
  20. typedef struct
  21. {
  22. unsigned cnt; // count of track records
  23. cmMidiTrackMsg_t* base; // pointer to first track recd
  24. cmMidiTrackMsg_t* last; // pointer to last track recd
  25. } _cmMidiTrack_t;
  26. typedef struct
  27. {
  28. cmErr_t err; // this objects error object
  29. cmLHeapH_t lhH; // linked heap used for all dynamically alloc'd data space
  30. cmFileH_t fh; // cmFile handle (only used in fmMidiFileOpen() and cmMidiFileWrite())
  31. unsigned short fmtId; // midi file type id: 0,1,2
  32. unsigned short ticksPerQN; // ticks per quarter note or 0 if smpteFmtId is valid
  33. cmMidiByte_t smpteFmtId; // smpte format or 0 if ticksPerQN is valid
  34. cmMidiByte_t smpteTicksPerFrame; // smpte ticks per frame or 0 if ticksPerQN is valid
  35. unsigned short trkN; // track count
  36. _cmMidiTrack_t* trkV; // track vector
  37. char* fn; // file name or NULL if this object did not originate from a file
  38. unsigned msgN; // count of msg's in msgV[]
  39. cmMidiTrackMsg_t** msgV; // sorted msg list
  40. bool msgVDirtyFl; // msgV[] needs to be refreshed from trkV[] because new msg's were inserted.
  41. unsigned nextUid; // next available msg uid
  42. } _cmMidiFile_t;
  43. cmMidiFileH_t cmMidiFileNullHandle = cmSTATIC_NULL_HANDLE;
  44. const cmMidiTrackMsg_t** _cmMidiFileMsgArray( _cmMidiFile_t* p );
  45. _cmMidiFile_t* _cmMidiFileHandleToPtr( cmMidiFileH_t h )
  46. {
  47. _cmMidiFile_t* p = (_cmMidiFile_t*)h.h;
  48. assert( p != NULL );
  49. return p;
  50. }
  51. cmMfRC_t _cmMidiFileRead8( _cmMidiFile_t* mfp, cmMidiByte_t* p )
  52. {
  53. if( cmFileReadUChar(mfp->fh,p,1) != kOkFileRC )
  54. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI byte read failed.");
  55. return kOkMfRC;
  56. }
  57. cmMfRC_t _cmMidiFileRead16( _cmMidiFile_t* mfp, unsigned short* p )
  58. {
  59. if( cmFileReadUShort(mfp->fh,p,1) != kOkFileRC )
  60. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI short read failed.");
  61. *p = mfSwap16(*p);
  62. return kOkMfRC;
  63. }
  64. cmMfRC_t _cmMidiFileRead24( _cmMidiFile_t* mfp, unsigned* p )
  65. {
  66. *p = 0;
  67. int i = 0;
  68. for(; i<3; ++i)
  69. {
  70. unsigned char c;
  71. if( cmFileReadUChar(mfp->fh,&c,1) != kOkFileRC )
  72. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI 24 bit integer read failed.");
  73. *p = (*p << 8) + c;
  74. }
  75. //*p =mfSwap32(*p);
  76. return kOkMfRC;
  77. }
  78. cmMfRC_t _cmMidiFileRead32( _cmMidiFile_t* mfp, unsigned* p )
  79. {
  80. if( cmFileReadUInt(mfp->fh,p,1) != kOkFileRC )
  81. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI integer read failed.");
  82. *p = mfSwap32(*p);
  83. return kOkMfRC;
  84. }
  85. cmMfRC_t _cmMidiFileReadText( _cmMidiFile_t* mfp, cmMidiTrackMsg_t* tmp, unsigned byteN )
  86. {
  87. if( byteN == 0 )
  88. return kOkMfRC;
  89. char* t = cmLhAllocZ(mfp->lhH,char,byteN+1);
  90. t[byteN] = 0;
  91. if( cmFileReadChar(mfp->fh,t,byteN) != kOkFileRC )
  92. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI read text failed.");
  93. tmp->u.text = t;
  94. tmp->byteCnt = byteN;
  95. return kOkMfRC;
  96. }
  97. cmMfRC_t _cmMidiFileReadRecd( _cmMidiFile_t* mfp, cmMidiTrackMsg_t* tmp, unsigned byteN )
  98. {
  99. char* t = cmLhAllocZ(mfp->lhH,char,byteN);
  100. if( cmFileReadChar(mfp->fh,t,byteN) != kOkFileRC )
  101. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI read record failed.");
  102. tmp->byteCnt = byteN;
  103. tmp->u.voidPtr = t;
  104. return kOkMfRC;
  105. }
  106. cmMfRC_t _cmMidiFileReadVarLen( _cmMidiFile_t* mfp, unsigned* p )
  107. {
  108. unsigned char c;
  109. if( cmFileReadUChar(mfp->fh,&c,1) != kOkFileRC )
  110. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI read variable length integer failed.");
  111. if( !(c & 0x80) )
  112. *p = c;
  113. else
  114. {
  115. *p = c & 0x7f;
  116. do
  117. {
  118. if( cmFileReadUChar(mfp->fh,&c,1) != kOkFileRC )
  119. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI read variable length integer failed.");
  120. *p = (*p << 7) + (c & 0x7f);
  121. }while( c & 0x80 );
  122. }
  123. return kOkMfRC;
  124. }
  125. cmMidiTrackMsg_t* _cmMidiFileAllocMsg( _cmMidiFile_t* mfp, unsigned short trkIdx, unsigned dtick, cmMidiByte_t status )
  126. {
  127. cmMidiTrackMsg_t* tmp = cmLhAllocZ(mfp->lhH,cmMidiTrackMsg_t, 1 );
  128. // set the generic track record fields
  129. tmp->dtick = dtick;
  130. tmp->status = status;
  131. tmp->metaId = kInvalidMetaMdId;
  132. tmp->trkIdx = trkIdx;
  133. tmp->byteCnt = 0;
  134. tmp->uid = mfp->nextUid++;
  135. return tmp;
  136. }
  137. cmMfRC_t _cmMidiFileAppendTrackMsg( _cmMidiFile_t* mfp, unsigned short trkIdx, unsigned dtick, cmMidiByte_t status, cmMidiTrackMsg_t** trkMsgPtrPtr )
  138. {
  139. cmMidiTrackMsg_t* tmp = _cmMidiFileAllocMsg( mfp, trkIdx, dtick, status );
  140. // link new record onto track record chain
  141. if( mfp->trkV[trkIdx].base == NULL )
  142. mfp->trkV[trkIdx].base = tmp;
  143. else
  144. mfp->trkV[trkIdx].last->link = tmp;
  145. mfp->trkV[trkIdx].last = tmp;
  146. mfp->trkV[trkIdx].cnt++;
  147. *trkMsgPtrPtr = tmp;
  148. return kOkMfRC;
  149. }
  150. cmMfRC_t _cmMidiFileReadSysEx( _cmMidiFile_t* mfp, cmMidiTrackMsg_t* tmp, unsigned byteN )
  151. {
  152. cmMfRC_t rc = kOkMfRC;
  153. cmMidiByte_t b = 0;
  154. if( byteN == cmInvalidCnt )
  155. {
  156. long offs;
  157. if( cmFileTell(mfp->fh,&offs) != kOkFileRC )
  158. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI File 'tell' failed.");
  159. byteN = 0;
  160. // get the length of the sys-ex msg
  161. while( !cmFileEof(mfp->fh) && (b != kSysComEoxMdId) )
  162. {
  163. if((rc = _cmMidiFileRead8(mfp,&b)) != kOkMfRC )
  164. return rc;
  165. ++byteN;
  166. }
  167. // verify that the EOX byte was found
  168. if( b != kSysComEoxMdId )
  169. return cmErrMsg(&mfp->err,kMissingEoxMfRC,"MIDI file missing 'end-of-sys-ex'.");
  170. // rewind to the beginning of the msg
  171. if( cmFileSeek(mfp->fh,kBeginFileFl,offs) != kOkFileRC )
  172. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file seek failed on sys-ex read.");
  173. }
  174. // allocate memory to hold the sys-ex msg
  175. cmMidiByte_t* mp = cmLhAllocZ(mfp->lhH,cmMidiByte_t, byteN );
  176. // read the sys-ex msg from the file into msg memory
  177. if( cmFileReadUChar(mfp->fh,mp,byteN) != kOkFileRC )
  178. return cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI sys-ex read failed.");
  179. tmp->byteCnt = byteN;
  180. tmp->u.sysExPtr = mp;
  181. return rc;
  182. }
  183. cmMfRC_t _cmMidiFileReadChannelMsg( _cmMidiFile_t* mfp, cmMidiByte_t* rsPtr, cmMidiByte_t status, cmMidiTrackMsg_t* tmp )
  184. {
  185. cmMfRC_t rc = kOkMfRC;
  186. cmMidiChMsg_t* p = cmLhAllocZ(mfp->lhH,cmMidiChMsg_t,1);
  187. unsigned useRsFl = status <= 0x7f;
  188. cmMidiByte_t statusCh = useRsFl ? *rsPtr : status;
  189. if( useRsFl )
  190. p->d0 = status;
  191. else
  192. *rsPtr = status;
  193. tmp->byteCnt = sizeof(cmMidiChMsg_t);
  194. tmp->status = statusCh & 0xf0;
  195. p->ch = statusCh & 0x0f;
  196. p->durMicros = 0;
  197. unsigned byteN = cmMidiStatusToByteCount(tmp->status);
  198. if( byteN==kInvalidMidiByte || byteN > 2 )
  199. return cmErrMsg(&mfp->err,kInvalidStatusMfRC,"Invalid status:0x%x %i.",tmp->status,tmp->status);
  200. unsigned i;
  201. for(i=useRsFl; i<byteN; ++i)
  202. {
  203. cmMidiByte_t* b = i==0 ? &p->d0 : &p->d1;
  204. if((rc = _cmMidiFileRead8(mfp,b)) != kOkMfRC )
  205. return rc;
  206. }
  207. // convert note-on velocity=0 to note off
  208. if( tmp->status == kNoteOnMdId && p->d1==0 )
  209. tmp->status = kNoteOffMdId;
  210. tmp->u.chMsgPtr = p;
  211. return rc;
  212. }
  213. cmMfRC_t _cmMidiFileReadMetaMsg( _cmMidiFile_t* mfp, cmMidiTrackMsg_t* tmp )
  214. {
  215. cmMidiByte_t metaId;
  216. cmMfRC_t rc;
  217. unsigned byteN = 0;
  218. if((rc = _cmMidiFileRead8(mfp,&metaId)) != kOkMfRC )
  219. return rc;
  220. if((rc = _cmMidiFileReadVarLen(mfp,&byteN)) != kOkMfRC )
  221. return rc;
  222. //printf("mt: %i 0x%x n:%i\n",metaId,metaId,byteN);
  223. switch( metaId )
  224. {
  225. case kSeqNumbMdId: rc = _cmMidiFileRead16(mfp,&tmp->u.sVal); break;
  226. case kTextMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  227. case kCopyMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  228. case kTrkNameMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  229. case kInstrNameMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  230. case kLyricsMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  231. case kMarkerMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  232. case kCuePointMdId: rc = _cmMidiFileReadText(mfp,tmp,byteN); break;
  233. case kMidiChMdId: rc = _cmMidiFileRead8(mfp,&tmp->u.bVal); break;
  234. case kEndOfTrkMdId: break;
  235. case kTempoMdId: rc = _cmMidiFileRead24(mfp,&tmp->u.iVal); break;
  236. case kSmpteMdId: rc = _cmMidiFileReadRecd(mfp,tmp,sizeof(cmMidiSmpte_t)); break;
  237. case kTimeSigMdId: rc = _cmMidiFileReadRecd(mfp,tmp,sizeof(cmMidiTimeSig_t)); break;
  238. case kKeySigMdId: rc = _cmMidiFileReadRecd(mfp,tmp,sizeof(cmMidiKeySig_t)); break;
  239. case kSeqSpecMdId: rc = _cmMidiFileReadSysEx(mfp,tmp,byteN); break;
  240. default:
  241. cmFileSeek(mfp->fh,kCurFileFl,byteN);
  242. rc = cmErrMsg(&mfp->err,kUnknownMetaIdMfRC,"Unknown meta status:0x%x %i.",metaId,metaId);
  243. }
  244. tmp->metaId = metaId;
  245. return rc;
  246. }
  247. cmMfRC_t _cmMidiFileReadTrack( _cmMidiFile_t* mfp, unsigned short trkIdx )
  248. {
  249. cmMfRC_t rc = kOkMfRC;
  250. unsigned dticks = 0;
  251. cmMidiByte_t status;
  252. cmMidiByte_t runstatus = 0;
  253. bool contFl = true;
  254. while( contFl && (rc==kOkMfRC))
  255. {
  256. cmMidiTrackMsg_t* tmp = NULL;
  257. // read the tick count
  258. if((rc = _cmMidiFileReadVarLen(mfp,&dticks)) != kOkMfRC )
  259. return rc;
  260. // read the status byte
  261. if((rc = _cmMidiFileRead8(mfp,&status)) != kOkMfRC )
  262. return rc;
  263. //printf("st:%i 0x%x\n",status,status);
  264. // append a track msg
  265. if((rc = _cmMidiFileAppendTrackMsg( mfp, trkIdx, dticks, status, &tmp )) != kOkMfRC )
  266. return rc;
  267. // switch on status
  268. switch( status )
  269. {
  270. // handle sys-ex msg
  271. case kSysExMdId:
  272. rc = _cmMidiFileReadSysEx(mfp,tmp,cmInvalidCnt);
  273. break;
  274. // handle meta msg
  275. case kMetaStId:
  276. rc = _cmMidiFileReadMetaMsg(mfp,tmp);
  277. // ignore unknown meta messages
  278. if( rc == kUnknownMetaIdMfRC )
  279. rc = kOkMfRC;
  280. contFl = tmp->metaId != kEndOfTrkMdId;
  281. break;
  282. default:
  283. // handle channel msg
  284. rc = _cmMidiFileReadChannelMsg(mfp,&runstatus,status,tmp);
  285. }
  286. }
  287. return rc;
  288. }
  289. cmMfRC_t _cmMidiFileReadHdr( _cmMidiFile_t* mfp )
  290. {
  291. cmMfRC_t rc;
  292. unsigned fileId;
  293. unsigned chunkByteN;
  294. // read the file id
  295. if((rc = _cmMidiFileRead32(mfp,&fileId)) != kOkMfRC )
  296. return rc;
  297. // verify the file id
  298. if( fileId != 'MThd' )
  299. return cmErrMsg(&mfp->err,kNotAMidiFileMfRC,"");
  300. // read the file chunk byte count
  301. if((rc = _cmMidiFileRead32(mfp,&chunkByteN)) != kOkMfRC )
  302. return rc;
  303. // read the format id
  304. if((rc = _cmMidiFileRead16(mfp,&mfp->fmtId)) != kOkMfRC )
  305. return rc;
  306. // read the track count
  307. if((rc = _cmMidiFileRead16(mfp,&mfp->trkN)) != kOkMfRC )
  308. return rc;
  309. // read the ticks per quarter note
  310. if((rc = _cmMidiFileRead16(mfp,&mfp->ticksPerQN)) != kOkMfRC )
  311. return rc;
  312. // if the division field was given in smpte
  313. if( mfp->ticksPerQN & 0x8000 )
  314. {
  315. mfp->smpteFmtId = (mfp->ticksPerQN & 0x7f00) >> 8;
  316. mfp->smpteTicksPerFrame = (mfp->ticksPerQN & 0xFF);
  317. mfp->ticksPerQN = 0;
  318. }
  319. // allocate and zero the track array
  320. if( mfp->trkN )
  321. mfp->trkV = cmLhAllocZ(mfp->lhH, _cmMidiTrack_t, mfp->trkN);
  322. return rc;
  323. }
  324. int _cmMidiFileSortFunc( const void *p0, const void* p1 )
  325. {
  326. if( (*(cmMidiTrackMsg_t**)p0)->atick == (*(cmMidiTrackMsg_t**)p1)->atick )
  327. return 0;
  328. return (*(cmMidiTrackMsg_t**)p0)->atick < (*(cmMidiTrackMsg_t**)p1)->atick ? -1 : 1;
  329. }
  330. // Set the absolute accumulated ticks (atick) value of each track message.
  331. // The absolute accumulated ticks gives a global time ordering for all
  332. // messages in the file.
  333. void _cmMidiFileSetAccumulateTicks( _cmMidiFile_t* p )
  334. {
  335. cmMidiTrackMsg_t* nextTrkMsg[ p->trkN ]; // next msg in each track
  336. unsigned long long atick = 0;
  337. unsigned i;
  338. bool fl = true;
  339. // iniitalize nextTrkTick[] and nextTrkMsg[] to the first msg in each track
  340. for(i=0; i<p->trkN; ++i)
  341. if((nextTrkMsg[i] = p->trkV[i].base) != NULL )
  342. nextTrkMsg[i]->atick = nextTrkMsg[i]->dtick;
  343. while(1)
  344. {
  345. unsigned k = cmInvalidIdx;
  346. // find the trk which has the next msg (min atick time)
  347. for(i=0; i<p->trkN; ++i)
  348. if( nextTrkMsg[i]!=NULL && (k==cmInvalidIdx || nextTrkMsg[i]->atick < nextTrkMsg[k]->atick) )
  349. k = i;
  350. // no next msg was found - we're done
  351. if( k == cmInvalidIdx )
  352. break;
  353. if( fl && nextTrkMsg[k]->dtick > 0 )
  354. {
  355. fl = false;
  356. nextTrkMsg[k]->dtick = 1;
  357. nextTrkMsg[k]->atick = 1;
  358. }
  359. // store the current atick
  360. atick = nextTrkMsg[k]->atick;
  361. // advance the selected track to it's next message
  362. nextTrkMsg[k] = nextTrkMsg[k]->link;
  363. // set the selected tracks next atick time
  364. if( nextTrkMsg[k] != NULL )
  365. nextTrkMsg[k]->atick = atick + nextTrkMsg[k]->dtick;
  366. }
  367. }
  368. void _cmMidiFileSetAbsoluteTime( _cmMidiFile_t* mfp )
  369. {
  370. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(mfp);
  371. double microsPerQN = 60000000/120; // default tempo;
  372. double microsPerTick = microsPerQN / mfp->ticksPerQN;
  373. unsigned long long amicro = 0;
  374. unsigned i;
  375. for(i=0; i<mfp->msgN; ++i)
  376. {
  377. cmMidiTrackMsg_t* mp = (cmMidiTrackMsg_t*)msgV[i]; // cast away const
  378. unsigned dtick = 0;
  379. if( i > 0 )
  380. {
  381. // atick must have already been set and sorted
  382. assert( mp->atick >= msgV[i-1]->atick );
  383. dtick = mp->atick - msgV[i-1]->atick;
  384. }
  385. amicro += microsPerTick * dtick;
  386. mp->amicro = amicro;
  387. // track tempo changes
  388. if( mp->status == kMetaStId && mp->metaId == kTempoMdId )
  389. microsPerTick = mp->u.iVal / mfp->ticksPerQN;
  390. }
  391. }
  392. cmMfRC_t _cmMidiFileClose( _cmMidiFile_t* mfp )
  393. {
  394. cmMfRC_t rc = kOkMfRC;
  395. if( mfp == NULL )
  396. return rc;
  397. cmMemPtrFree(&mfp->msgV);
  398. if( cmFileIsValid( mfp->fh ) )
  399. if( cmFileClose( &mfp->fh ) != kOkFileRC )
  400. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file close failed.");
  401. if( cmLHeapIsValid( mfp->lhH ) )
  402. cmLHeapDestroy(&mfp->lhH);
  403. cmMemPtrFree(&mfp);
  404. return rc;
  405. }
  406. void _cmMidiFileLinearize( _cmMidiFile_t* mfp )
  407. {
  408. unsigned trkIdx,i,j;
  409. if( mfp->msgVDirtyFl == false )
  410. return;
  411. // get the total trk msg count
  412. mfp->msgN = 0;
  413. for(trkIdx=0; trkIdx<mfp->trkN; ++trkIdx)
  414. mfp->msgN += mfp->trkV[ trkIdx ].cnt;
  415. // allocate the trk msg index vector: msgV[]
  416. mfp->msgV = cmMemResizeZ(cmMidiTrackMsg_t*, mfp->msgV, mfp->msgN);
  417. // store a pointer to every trk msg in msgV[]
  418. for(i=0,j=0; i<mfp->trkN; ++i)
  419. {
  420. cmMidiTrackMsg_t* m = mfp->trkV[i].base;
  421. for(; m!=NULL; m=m->link)
  422. {
  423. assert( j < mfp->msgN );
  424. mfp->msgV[j++] = m;
  425. }
  426. }
  427. // set the atick value in each msg
  428. _cmMidiFileSetAccumulateTicks(mfp);
  429. // sort msgV[] in ascending order on atick
  430. qsort( mfp->msgV, mfp->msgN, sizeof(cmMidiTrackMsg_t*), _cmMidiFileSortFunc );
  431. // set the amicro value in each msg
  432. _cmMidiFileSetAbsoluteTime(mfp);
  433. mfp->msgVDirtyFl = false;
  434. }
  435. // Note that p->msgV[] should always be accessed through this function
  436. // to guarantee that the p->msgVDirtyFl is checked and msgV[] is updated
  437. // in case msgV[] is out of sync (due to inserted msgs (see cmMidiFileInsertTrackMsg())
  438. // with trkV[].
  439. const cmMidiTrackMsg_t** _cmMidiFileMsgArray( _cmMidiFile_t* p )
  440. {
  441. _cmMidiFileLinearize(p);
  442. // this cast is needed to eliminate an apparently needless 'incompatible type' warning
  443. return (const cmMidiTrackMsg_t**)p->msgV;
  444. }
  445. cmMfRC_t _cmMidiFileCreate( cmCtx_t* ctx, cmMidiFileH_t* hp )
  446. {
  447. cmMfRC_t rc = kOkMfRC;
  448. _cmMidiFile_t* p = NULL;
  449. if((rc = cmMidiFileClose(hp)) != kOkMfRC )
  450. return rc;
  451. // allocate the midi file object
  452. if(( p = cmMemAllocZ( _cmMidiFile_t, 1)) == NULL )
  453. return rc = cmErrMsg(&ctx->err,kMemAllocFailMfRC,"MIDI file memory allocation failed.");
  454. cmErrSetup(&p->err,&ctx->rpt,"MIDI File");
  455. // allocate the linked heap
  456. if( cmLHeapIsValid( p->lhH = cmLHeapCreate( 1024, ctx )) == false )
  457. rc = cmErrMsg(&p->err,kMemAllocFailMfRC,"MIDI heap allocation failed.");
  458. if( rc != kOkMfRC )
  459. _cmMidiFileClose(p);
  460. else
  461. hp->h = p;
  462. return rc;
  463. }
  464. cmMfRC_t cmMidiFileOpen( cmCtx_t* ctx, cmMidiFileH_t* hp, const char* fn )
  465. {
  466. cmMfRC_t rc = kOkMfRC;
  467. unsigned short trkIdx = 0;
  468. if((rc = _cmMidiFileCreate(ctx,hp)) != kOkMfRC )
  469. return rc;
  470. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(*hp);
  471. // open the file
  472. if(cmFileOpen(&p->fh,fn,kReadFileFl | kBinaryFileFl,p->err.rpt) != kOkFileRC )
  473. {
  474. rc = cmErrMsg(&p->err,kFileFailMfRC,"MIDI file open failed.");
  475. goto errLabel;
  476. }
  477. // read header and setup track array
  478. if(( rc = _cmMidiFileReadHdr(p)) != kOkMfRC )
  479. goto errLabel;
  480. while( !cmFileEof(p->fh) && trkIdx < p->trkN )
  481. {
  482. unsigned chkId = 0,chkN=0;
  483. // read the chunk id
  484. if((rc = _cmMidiFileRead32(p,&chkId)) != kOkMfRC )
  485. goto errLabel;
  486. // read the chunk size
  487. if((rc = _cmMidiFileRead32(p,&chkN)) != kOkMfRC )
  488. goto errLabel;
  489. // if this is not a trk chunk then skip it
  490. if( chkId != (unsigned)'MTrk')
  491. {
  492. //if( fseek( p->fp, chkN, SEEK_CUR) != 0 )
  493. if( cmFileSeek(p->fh,kCurFileFl,chkN) != kOkFileRC )
  494. {
  495. rc = cmErrMsg(&p->err,kFileFailMfRC,"MIDI file seek failed.");
  496. goto errLabel;
  497. }
  498. }
  499. else
  500. {
  501. if((rc = _cmMidiFileReadTrack(p,trkIdx)) != kOkMfRC )
  502. goto errLabel;
  503. ++trkIdx;
  504. }
  505. }
  506. // store the file name
  507. p->fn = cmLhAllocZ(p->lhH,char,strlen(fn)+1);
  508. assert( p->fn != NULL );
  509. strcpy(p->fn,fn);
  510. p->msgVDirtyFl = true;
  511. _cmMidiFileLinearize(p);
  512. errLabel:
  513. if( cmFileClose(&p->fh) != kOkFileRC )
  514. rc = cmErrMsg(&p->err,kFileFailMfRC,"MIDI file close failed.");
  515. if( rc != kOkMfRC )
  516. _cmMidiFileClose(p);
  517. return rc;
  518. }
  519. cmMfRC_t cmMidiFileCreate( cmCtx_t* ctx, cmMidiFileH_t* hp, unsigned trkN, unsigned ticksPerQN )
  520. {
  521. cmMfRC_t rc = kOkMfRC;
  522. if((rc = _cmMidiFileCreate(ctx,hp)) != kOkMfRC )
  523. return rc;
  524. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(*hp);
  525. p->ticksPerQN = ticksPerQN;
  526. p->fmtId = 1;
  527. p->trkN = trkN;
  528. p->trkV = cmLhAllocZ(p->lhH, _cmMidiTrack_t, p->trkN);
  529. return rc;
  530. }
  531. cmMfRC_t cmMidiFileClose( cmMidiFileH_t* hp )
  532. {
  533. cmMfRC_t rc = kOkMfRC;
  534. if( hp==NULL || cmMidiFileIsValid(*hp)==false )
  535. return kOkMfRC;
  536. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(*hp);
  537. if((rc = _cmMidiFileClose(p)) != kOkMfRC )
  538. return rc;
  539. hp->h = NULL;
  540. return rc;
  541. }
  542. cmMfRC_t _cmMidiFileWrite8( _cmMidiFile_t* mfp, unsigned char v )
  543. {
  544. cmMfRC_t rc = kOkMfRC;
  545. if( cmFileWriteUChar(mfp->fh,&v,1) != kOkFileRC )
  546. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file byte write failed.");
  547. return rc;
  548. }
  549. cmMfRC_t _cmMidiFileWrite16( _cmMidiFile_t* mfp, unsigned short v )
  550. {
  551. cmMfRC_t rc = kOkMfRC;
  552. v = mfSwap16(v);
  553. if( cmFileWriteUShort(mfp->fh,&v,1) != kOkFileRC )
  554. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file short integer write failed.");
  555. return rc;
  556. }
  557. cmMfRC_t _cmMidiFileWrite24( _cmMidiFile_t* mfp, unsigned v )
  558. {
  559. cmMfRC_t rc = kOkMfRC;
  560. unsigned mask = 0xff0000;
  561. int i;
  562. for(i = 2; i>=0; --i)
  563. {
  564. unsigned char c = (v & mask) >> (i*8);
  565. mask >>= 8;
  566. if( cmFileWriteUChar(mfp->fh,&c,1) != kOkFileRC )
  567. {
  568. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file 24 bit integer write failed.");
  569. goto errLabel;
  570. }
  571. }
  572. errLabel:
  573. return rc;
  574. }
  575. cmMfRC_t _cmMidiFileWrite32( _cmMidiFile_t* mfp, unsigned v )
  576. {
  577. cmMfRC_t rc = kOkMfRC;
  578. v = mfSwap32(v);
  579. if( cmFileWriteUInt(mfp->fh,&v,1) != kOkFileRC )
  580. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file integer write failed.");
  581. return rc;
  582. }
  583. cmMfRC_t _cmMidiFileWriteRecd( _cmMidiFile_t* mfp, const void* v, unsigned byteCnt )
  584. {
  585. cmMfRC_t rc = kOkMfRC;
  586. if( cmFileWriteChar(mfp->fh,v,byteCnt) != kOkFileRC )
  587. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file write record failed.");
  588. return rc;
  589. }
  590. cmMfRC_t _cmMidiFileWriteVarLen( _cmMidiFile_t* mfp, unsigned v )
  591. {
  592. cmMfRC_t rc = kOkMfRC;
  593. unsigned buf = v & 0x7f;
  594. while((v >>= 7) > 0 )
  595. {
  596. buf <<= 8;
  597. buf |= 0x80;
  598. buf += (v & 0x7f);
  599. }
  600. while(1)
  601. {
  602. unsigned char c = (unsigned char)(buf & 0xff);
  603. if( cmFileWriteUChar(mfp->fh,&c,1) != kOkFileRC )
  604. {
  605. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file variable length integer write failed.");
  606. goto errLabel;
  607. }
  608. if( buf & 0x80 )
  609. buf >>= 8;
  610. else
  611. break;
  612. }
  613. errLabel:
  614. return rc;
  615. }
  616. cmMfRC_t _cmMidiFileWriteHdr( _cmMidiFile_t* mfp )
  617. {
  618. cmMfRC_t rc;
  619. unsigned fileId = 'MThd';
  620. unsigned chunkByteN = 6;
  621. // write the file id ('MThd')
  622. if((rc = _cmMidiFileWrite32(mfp,fileId)) != kOkMfRC )
  623. return rc;
  624. // write the file chunk byte count (always 6)
  625. if((rc = _cmMidiFileWrite32(mfp,chunkByteN)) != kOkMfRC )
  626. return rc;
  627. // write the MIDI file format id (0,1,2)
  628. if((rc = _cmMidiFileWrite16(mfp,mfp->fmtId)) != kOkMfRC )
  629. return rc;
  630. // write the track count
  631. if((rc = _cmMidiFileWrite16(mfp,mfp->trkN)) != kOkMfRC )
  632. return rc;
  633. unsigned short v = 0;
  634. // if the ticks per quarter note field is valid ...
  635. if( mfp->ticksPerQN )
  636. v = mfp->ticksPerQN;
  637. else
  638. {
  639. // ... otherwise the division field was given in smpte
  640. v = mfp->smpteFmtId << 8;
  641. v += mfp->smpteTicksPerFrame;
  642. }
  643. if((rc = _cmMidiFileWrite16(mfp,v)) != kOkMfRC )
  644. return rc;
  645. return rc;
  646. }
  647. cmMfRC_t _cmMidiFileWriteSysEx( _cmMidiFile_t* mfp, cmMidiTrackMsg_t* tmp )
  648. {
  649. cmMfRC_t rc = kOkMfRC;
  650. if((rc = _cmMidiFileWrite8(mfp,kSysExMdId)) != kOkMfRC )
  651. goto errLabel;
  652. if( cmFileWriteUChar(mfp->fh,tmp->u.sysExPtr,tmp->byteCnt) != kOkFileRC )
  653. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"Sys-ex msg write failed.");
  654. errLabel:
  655. return rc;
  656. }
  657. cmMfRC_t _cmMidiFileWriteChannelMsg( _cmMidiFile_t* mfp, const cmMidiTrackMsg_t* tmp, cmMidiByte_t* runStatus )
  658. {
  659. cmMfRC_t rc = kOkMfRC;
  660. unsigned byteN = cmMidiStatusToByteCount(tmp->status);
  661. cmMidiByte_t status = tmp->status + tmp->u.chMsgPtr->ch;
  662. if( status != *runStatus )
  663. {
  664. *runStatus = status;
  665. if((rc = _cmMidiFileWrite8(mfp,status)) != kOkMfRC )
  666. goto errLabel;
  667. }
  668. if(byteN>=1)
  669. if((rc = _cmMidiFileWrite8(mfp,tmp->u.chMsgPtr->d0)) != kOkMfRC )
  670. goto errLabel;
  671. if(byteN>=2)
  672. if((rc = _cmMidiFileWrite8(mfp,tmp->u.chMsgPtr->d1)) != kOkMfRC )
  673. goto errLabel;
  674. errLabel:
  675. return rc;
  676. }
  677. cmMfRC_t _cmMidiFileWriteMetaMsg( _cmMidiFile_t* mfp, const cmMidiTrackMsg_t* tmp )
  678. {
  679. cmMfRC_t rc;
  680. if((rc = _cmMidiFileWrite8(mfp,kMetaStId)) != kOkMfRC )
  681. return rc;
  682. if((rc = _cmMidiFileWrite8(mfp,tmp->metaId)) != kOkMfRC )
  683. return rc;
  684. switch( tmp->metaId )
  685. {
  686. case kSeqNumbMdId:
  687. if((rc = _cmMidiFileWrite8(mfp,sizeof(tmp->u.sVal))) == kOkMfRC )
  688. rc = _cmMidiFileWrite16(mfp,tmp->u.sVal);
  689. break;
  690. case kTempoMdId:
  691. if((rc = _cmMidiFileWrite8(mfp,3)) == kOkMfRC )
  692. rc = _cmMidiFileWrite24(mfp,tmp->u.iVal);
  693. break;
  694. case kSmpteMdId:
  695. if((rc = _cmMidiFileWrite8(mfp,sizeof(cmMidiSmpte_t))) == kOkMfRC )
  696. rc = _cmMidiFileWriteRecd(mfp,tmp->u.smptePtr,sizeof(cmMidiSmpte_t));
  697. break;
  698. case kTimeSigMdId:
  699. if((rc = _cmMidiFileWrite8(mfp,sizeof(cmMidiTimeSig_t))) == kOkMfRC )
  700. rc = _cmMidiFileWriteRecd(mfp,tmp->u.timeSigPtr,sizeof(cmMidiTimeSig_t));
  701. break;
  702. case kKeySigMdId:
  703. if((rc = _cmMidiFileWrite8(mfp,sizeof(cmMidiKeySig_t))) == kOkMfRC )
  704. rc = _cmMidiFileWriteRecd(mfp,tmp->u.keySigPtr,sizeof(cmMidiKeySig_t));
  705. break;
  706. case kSeqSpecMdId:
  707. if((rc = _cmMidiFileWriteVarLen(mfp,sizeof(tmp->byteCnt))) == kOkMfRC )
  708. rc = _cmMidiFileWriteRecd(mfp,tmp->u.sysExPtr,tmp->byteCnt);
  709. break;
  710. case kMidiChMdId:
  711. if((rc = _cmMidiFileWrite8(mfp,sizeof(tmp->u.bVal))) == kOkMfRC )
  712. rc = _cmMidiFileWrite8(mfp,tmp->u.bVal);
  713. break;
  714. case kEndOfTrkMdId:
  715. rc = _cmMidiFileWrite8(mfp,0);
  716. break;
  717. case kTextMdId:
  718. case kCopyMdId:
  719. case kTrkNameMdId:
  720. case kInstrNameMdId:
  721. case kLyricsMdId:
  722. case kMarkerMdId:
  723. case kCuePointMdId:
  724. {
  725. unsigned n = tmp->u.text==NULL ? 0 : strlen(tmp->u.text);
  726. if((rc = _cmMidiFileWriteVarLen(mfp,n)) == kOkMfRC && n>0 )
  727. rc = _cmMidiFileWriteRecd(mfp,tmp->u.text,n);
  728. }
  729. break;
  730. default:
  731. {
  732. // ignore unknown meta messages
  733. }
  734. }
  735. return rc;
  736. }
  737. cmMfRC_t _cmMidiFileWriteTrack( _cmMidiFile_t* mfp, unsigned trkIdx )
  738. {
  739. cmMfRC_t rc = kOkMfRC;
  740. cmMidiTrackMsg_t* tmp = mfp->trkV[trkIdx].base;
  741. cmMidiByte_t runStatus = 0;
  742. for(; tmp != NULL; tmp=tmp->link)
  743. {
  744. // write the msg tick count
  745. if((rc = _cmMidiFileWriteVarLen(mfp,tmp->dtick)) != kOkMfRC )
  746. return rc;
  747. // switch on status
  748. switch( tmp->status )
  749. {
  750. // handle sys-ex msg
  751. case kSysExMdId:
  752. rc = _cmMidiFileWriteSysEx(mfp,tmp);
  753. break;
  754. // handle meta msg
  755. case kMetaStId:
  756. rc = _cmMidiFileWriteMetaMsg(mfp,tmp);
  757. break;
  758. default:
  759. // handle channel msg
  760. rc = _cmMidiFileWriteChannelMsg(mfp,tmp,&runStatus);
  761. }
  762. }
  763. return rc;
  764. }
  765. cmMfRC_t cmMidiFileWrite( cmMidiFileH_t h, const char* fn )
  766. {
  767. cmMfRC_t rc = kOkMfRC;
  768. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  769. unsigned i;
  770. // create the output file
  771. if( cmFileOpen(&mfp->fh,fn,kWriteFileFl,mfp->err.rpt) != kOkFileRC )
  772. return cmErrMsg(&mfp->err,kFileFailMfRC,"The MIDI file '%s' could not be created.",cmStringNullGuard(fn));
  773. // write the file header
  774. if((rc = _cmMidiFileWriteHdr(mfp)) != kOkMfRC )
  775. {
  776. rc = cmErrMsg(&mfp->err,rc,"The file header write failed on the MIDI file '%s'.",cmStringNullGuard(fn));
  777. goto errLabel;
  778. }
  779. for(i=0; i < mfp->trkN; ++i )
  780. {
  781. unsigned chkId = 'MTrk';
  782. long offs0,offs1;
  783. // write the track chunk id ('MTrk')
  784. if((rc = _cmMidiFileWrite32(mfp,chkId)) != kOkMfRC )
  785. goto errLabel;
  786. cmFileTell(mfp->fh,&offs0);
  787. // write the track chunk size as zero
  788. if((rc = _cmMidiFileWrite32(mfp,0)) != kOkMfRC )
  789. goto errLabel;
  790. if((rc = _cmMidiFileWriteTrack(mfp,i)) != kOkMfRC )
  791. goto errLabel;
  792. cmFileTell(mfp->fh,&offs1);
  793. cmFileSeek(mfp->fh,kBeginFileFl,offs0);
  794. _cmMidiFileWrite32(mfp,offs1-offs0-4);
  795. cmFileSeek(mfp->fh,kBeginFileFl,offs1);
  796. }
  797. errLabel:
  798. cmFileClose(&mfp->fh);
  799. return rc;
  800. }
  801. bool cmMidiFileIsValid( cmMidiFileH_t h )
  802. { return h.h != NULL; }
  803. unsigned cmMidiFileTrackCount( cmMidiFileH_t h )
  804. {
  805. _cmMidiFile_t* mfp;
  806. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  807. return cmInvalidCnt;
  808. return mfp->trkN;
  809. }
  810. unsigned cmMidiFileType( cmMidiFileH_t h )
  811. {
  812. _cmMidiFile_t* mfp;
  813. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  814. return cmInvalidId;
  815. return mfp->fmtId;
  816. }
  817. const char* cmMidiFileName( cmMidiFileH_t h )
  818. {
  819. _cmMidiFile_t* mfp;
  820. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  821. return NULL;
  822. return mfp->fn;
  823. }
  824. unsigned cmMidiFileTicksPerQN( cmMidiFileH_t h )
  825. {
  826. _cmMidiFile_t* mfp;
  827. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  828. return cmInvalidCnt;
  829. return mfp->ticksPerQN;
  830. }
  831. cmMidiByte_t cmMidiFileTicksPerSmpteFrame( cmMidiFileH_t h )
  832. {
  833. _cmMidiFile_t* mfp;
  834. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  835. return kInvalidMidiByte;
  836. if( mfp->ticksPerQN != 0 )
  837. return 0;
  838. return mfp->smpteTicksPerFrame;
  839. }
  840. cmMidiByte_t cmMidiFileSmpteFormatId( cmMidiFileH_t h )
  841. {
  842. _cmMidiFile_t* mfp;
  843. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  844. return kInvalidMidiByte;
  845. if( mfp->ticksPerQN != 0 )
  846. return 0;
  847. return mfp->smpteFmtId;
  848. }
  849. unsigned cmMidiFileTrackMsgCount( cmMidiFileH_t h, unsigned trackIdx )
  850. {
  851. _cmMidiFile_t* mfp;
  852. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  853. return cmInvalidCnt;
  854. return mfp->trkV[trackIdx].cnt;
  855. }
  856. const cmMidiTrackMsg_t* cmMidiFileTrackMsg( cmMidiFileH_t h, unsigned trackIdx )
  857. {
  858. _cmMidiFile_t* mfp;
  859. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  860. return NULL;
  861. return mfp->trkV[trackIdx].base;
  862. }
  863. unsigned cmMidiFileMsgCount( cmMidiFileH_t h )
  864. {
  865. _cmMidiFile_t* mfp;
  866. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  867. return cmInvalidCnt;
  868. return mfp->msgN;
  869. }
  870. const cmMidiTrackMsg_t** cmMidiFileMsgArray( cmMidiFileH_t h )
  871. {
  872. _cmMidiFile_t* mfp;
  873. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  874. return NULL;
  875. return _cmMidiFileMsgArray(mfp);
  876. }
  877. cmMidiTrackMsg_t* _cmMidiFileUidToMsg( _cmMidiFile_t* mfp, unsigned uid )
  878. {
  879. unsigned i;
  880. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(mfp);
  881. for(i=0; i<mfp->msgN; ++i)
  882. if( msgV[i]->uid == uid )
  883. return (cmMidiTrackMsg_t*)msgV[i];
  884. return NULL;
  885. }
  886. cmMfRC_t cmMidiFileSetVelocity( cmMidiFileH_t h, unsigned uid, cmMidiByte_t vel )
  887. {
  888. cmMidiTrackMsg_t* r;
  889. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  890. assert( mfp != NULL );
  891. if((r = _cmMidiFileUidToMsg(mfp,uid)) == NULL )
  892. return cmErrMsg(&mfp->err,kUidNotFoundMfRC,"The MIDI file uid %i could not be found.",uid);
  893. if( cmMidiIsNoteOn(r->status) == false && cmMidiIsNoteOff(r->status,0)==false )
  894. return cmErrMsg(&mfp->err,kUidNotANoteMsgMfRC,"Cannot set velocity on a non-Note-On/Off msg.");
  895. cmMidiChMsg_t* chm = (cmMidiChMsg_t*)r->u.chMsgPtr;
  896. chm->d1 = vel;
  897. return kOkMfRC;
  898. }
  899. // Returns NULL if uid is not found or if it the first msg on the track.
  900. cmMidiTrackMsg_t* _cmMidiFileMsgBeforeUid( _cmMidiFile_t* p, unsigned uid )
  901. {
  902. cmMidiTrackMsg_t* m;
  903. if((m = _cmMidiFileUidToMsg(p,uid)) == NULL )
  904. return NULL;
  905. assert( m->trkIdx < p->trkN );
  906. cmMidiTrackMsg_t* m0 = NULL;
  907. cmMidiTrackMsg_t* m1 = p->trkV[ m->trkIdx ].base;
  908. for(; m1!=NULL; m1 = m1->link)
  909. {
  910. if( m1->uid == uid )
  911. break;
  912. m0 = m1;
  913. }
  914. return m0;
  915. }
  916. unsigned _cmMidiFileIsMsgFirstOnTrack( _cmMidiFile_t* p, unsigned uid )
  917. {
  918. unsigned i;
  919. for(i=0; i<p->trkN; ++i)
  920. if( p->trkV[i].base!=NULL && p->trkV[i].base->uid == uid )
  921. return i;
  922. return cmInvalidIdx;
  923. }
  924. cmMfRC_t cmMidiFileInsertMsg( cmMidiFileH_t h, unsigned uid, int dtick, cmMidiByte_t ch, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 )
  925. {
  926. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  927. assert( mfp != NULL );
  928. cmMidiTrackMsg_t* ref = NULL;
  929. unsigned trkIdx = cmInvalidIdx;
  930. // if dtick is positive ...
  931. if( dtick >= 0 )
  932. {
  933. ref = _cmMidiFileUidToMsg(mfp,uid); // ... then get the ref. msg.
  934. trkIdx = ref->trkIdx;
  935. }
  936. else // if dtick is negative ...
  937. {
  938. // ... get get the msg before the ref. msg.
  939. if((ref = _cmMidiFileMsgBeforeUid(mfp,uid)) != NULL )
  940. trkIdx = ref->trkIdx;
  941. else
  942. {
  943. // ... the ref. msg was first in the track so there is no msg before it
  944. trkIdx = _cmMidiFileIsMsgFirstOnTrack(mfp,uid);
  945. }
  946. }
  947. // verify that the reference msg was found
  948. if( trkIdx == cmInvalidIdx )
  949. return cmErrMsg(&mfp->err,kUidNotFoundMfRC,"The UID (%i) reference note could not be located.",uid);
  950. assert( trkIdx < mfp->trkN );
  951. // complete the msg setup
  952. _cmMidiTrack_t* trk = mfp->trkV + trkIdx;
  953. cmMidiTrackMsg_t* m = _cmMidiFileAllocMsg(mfp, trkIdx, abs(dtick), status );
  954. cmMidiChMsg_t* c = cmLhAllocZ(mfp->lhH,cmMidiChMsg_t,1);
  955. m->u.chMsgPtr = c;
  956. c->ch = ch;
  957. c->d0 = d0;
  958. c->d1 = d1;
  959. // if 'm' is prior to the first msg in the track
  960. if( ref == NULL )
  961. {
  962. // ... then make 'm' the first msg in the first msg
  963. m->link = trk->base;
  964. trk->base = m;
  965. // 'm' is before ref and the track cannot be empty (because ref is in it) 'm'
  966. // can never be the last msg in the list
  967. }
  968. else // ref is the msg before 'm'
  969. {
  970. m->link = ref->link;
  971. ref->link = m;
  972. // if ref was the last msg in the trk ...
  973. if( trk->last == ref )
  974. trk->last = m; //... then 'm' is now the last msg in the trk
  975. }
  976. trk->cnt += 1;
  977. mfp->msgVDirtyFl = true;
  978. return kOkMfRC;
  979. }
  980. cmMfRC_t cmMidiFileInsertTrackMsg( cmMidiFileH_t h, unsigned trkIdx, const cmMidiTrackMsg_t* msg )
  981. {
  982. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(h);
  983. // validate the track index
  984. if( trkIdx >= p->trkN )
  985. return cmErrMsg(&p->err,kInvalidTrkIndexMfRC,"The track index (%i) is invalid.",trkIdx);
  986. // allocate a new track record
  987. cmMidiTrackMsg_t* m = (cmMidiTrackMsg_t*)cmLhAllocZ(p->lhH,char,sizeof(cmMidiTrackMsg_t)+msg->byteCnt);
  988. // fill the track record
  989. m->uid = p->nextUid++;
  990. m->atick = msg->atick;
  991. m->status = msg->status;
  992. m->metaId = msg->metaId;
  993. m->trkIdx = trkIdx;
  994. m->byteCnt = msg->byteCnt;
  995. memcpy(&m->u,&msg->u,sizeof(msg->u));
  996. // copy the exernal data
  997. if( msg->byteCnt > 0 )
  998. {
  999. m->u.voidPtr = (m+1);
  1000. memcpy((void*)m->u.voidPtr,msg->u.voidPtr,msg->byteCnt);
  1001. }
  1002. cmMidiTrackMsg_t* m0 = NULL; // msg before insertion
  1003. cmMidiTrackMsg_t* m1 = p->trkV[trkIdx].base; // msg after insertion
  1004. // locate the track record before and after the new msg based on 'atick' value
  1005. for(; m1!=NULL; m1=m1->link)
  1006. {
  1007. if( m1->atick > m->atick )
  1008. {
  1009. if( m0 == NULL )
  1010. p->trkV[trkIdx].base = m;
  1011. else
  1012. m0->link = m;
  1013. m->link = m1;
  1014. break;
  1015. }
  1016. m0 = m1;
  1017. }
  1018. // if the new track record was not inserted then it is the last msg
  1019. if( m1 == NULL )
  1020. {
  1021. assert(m0 == p->trkV[trkIdx].last);
  1022. // link in the new msg
  1023. if( m0 != NULL )
  1024. m0->link = m;
  1025. // the new msg always becomes the last msg
  1026. p->trkV[trkIdx].last = m;
  1027. // if the new msg is the first msg inserted in this track
  1028. if( p->trkV[trkIdx].base == NULL )
  1029. p->trkV[trkIdx].base = m;
  1030. }
  1031. // set the dtick field of the new msg
  1032. if( m0 != NULL )
  1033. {
  1034. assert( m->atick >= m0->atick );
  1035. m->dtick = m->atick - m0->atick;
  1036. }
  1037. // update the dtick field of the msg following the new msg
  1038. if( m1 != NULL )
  1039. {
  1040. assert( m1->atick >= m->atick );
  1041. m1->dtick = m1->atick - m->atick;
  1042. }
  1043. p->msgVDirtyFl = true;
  1044. return kOkMfRC;
  1045. }
  1046. cmMfRC_t cmMidiFileInsertTrackChMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 )
  1047. {
  1048. cmMidiTrackMsg_t m;
  1049. cmMidiChMsg_t cm;
  1050. memset(&m,0,sizeof(m));
  1051. memset(&cm,0,sizeof(cm));
  1052. cm.ch = status & 0x0f;
  1053. cm.d0 = d0;
  1054. cm.d1 = d1;
  1055. m.atick = atick;
  1056. m.status = status & 0xf0;
  1057. m.byteCnt = sizeof(cm);
  1058. m.u.chMsgPtr = &cm;
  1059. return cmMidiFileInsertTrackMsg(h,trkIdx,&m);
  1060. }
  1061. cmMfRC_t cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, unsigned bpm )
  1062. {
  1063. cmMidiTrackMsg_t m;
  1064. memset(&m,0,sizeof(m));
  1065. m.atick = atick;
  1066. m.status = kMetaStId;
  1067. m.metaId = kTempoMdId;
  1068. m.u.iVal = 60000000/bpm; // convert BPM to microsPerQN
  1069. return cmMidiFileInsertTrackMsg(h,trkIdx,&m);
  1070. }
  1071. unsigned cmMidiFileSeekUsecs( cmMidiFileH_t h, unsigned long long offsUSecs, unsigned* msgUsecsPtr, unsigned* microsPerTickPtr )
  1072. {
  1073. _cmMidiFile_t* p;
  1074. if((p = _cmMidiFileHandleToPtr(h)) == NULL )
  1075. return cmInvalidIdx;
  1076. if( p->msgN == 0 )
  1077. return cmInvalidIdx;
  1078. unsigned mi;
  1079. double microsPerQN = 60000000.0/120.0;
  1080. double microsPerTick = microsPerQN / p->ticksPerQN;
  1081. double accUSecs = 0;
  1082. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1083. for(mi=0; mi<p->msgN; ++mi)
  1084. {
  1085. const cmMidiTrackMsg_t* mp = msgV[mi];
  1086. if( mp->amicro >= offsUSecs )
  1087. break;
  1088. }
  1089. if( mi == p->msgN )
  1090. return cmInvalidIdx;
  1091. if( msgUsecsPtr != NULL )
  1092. *msgUsecsPtr = round(accUSecs - offsUSecs);
  1093. if( microsPerTickPtr != NULL )
  1094. *microsPerTickPtr = round(microsPerTick);
  1095. return mi;
  1096. }
  1097. double cmMidiFileDurSecs( cmMidiFileH_t h )
  1098. {
  1099. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  1100. if( mfp->msgN == 0 )
  1101. return 0;
  1102. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(mfp);
  1103. return msgV[ mfp->msgN-1 ]->amicro / 1000000.0;
  1104. }
  1105. typedef struct _cmMidiVoice_str
  1106. {
  1107. const cmMidiTrackMsg_t* mp;
  1108. unsigned durMicros;
  1109. bool sustainFl;
  1110. struct _cmMidiVoice_str* link;
  1111. } _cmMidiVoice_t;
  1112. void _cmMidiFileSetDur( cmMidiTrackMsg_t* m0, cmMidiTrackMsg_t* m1 )
  1113. {
  1114. // calculate the duration of the sounding note
  1115. ((cmMidiChMsg_t*)m0->u.chMsgPtr)->durMicros = m1->amicro - m0->amicro;
  1116. // set the note-off msg pointer
  1117. ((cmMidiChMsg_t*)m0->u.chMsgPtr)->end = m1;
  1118. }
  1119. bool _cmMidiFileCalcNoteDur( cmMidiTrackMsg_t* m0, cmMidiTrackMsg_t* m1, int noteGateFl, int sustainGateFl, bool sostGateFl )
  1120. {
  1121. // if the note is being kept sounding because the key is still depressed,
  1122. // the sustain pedal is down or it is being held by the sostenuto pedal ....
  1123. if( noteGateFl>0 || sustainGateFl>0 || sostGateFl )
  1124. return false; // ... do nothing
  1125. _cmMidiFileSetDur(m0,m1);
  1126. return true;
  1127. }
  1128. void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
  1129. {
  1130. _cmMidiFile_t* p;
  1131. if((p = _cmMidiFileHandleToPtr(h)) == NULL )
  1132. return;
  1133. if( p->msgN == 0 )
  1134. return;
  1135. unsigned mi = cmInvalidId;
  1136. cmMidiTrackMsg_t* noteM[ kMidiNoteCnt * kMidiChCnt ]; // ptr to note-on or NULL if the note is not sounding
  1137. cmMidiTrackMsg_t* sustV[ kMidiChCnt ];
  1138. cmMidiTrackMsg_t* sostV[ kMidiChCnt ];
  1139. int noteGateM[ kMidiNoteCnt * kMidiChCnt ]; // true if the associated note key is depressed
  1140. bool sostGateM[ kMidiNoteCnt * kMidiChCnt ]; // true if the associated note was active when the sost. pedal went down
  1141. int sustGateV[ kMidiChCnt]; // true if the associated sustain pedal is down
  1142. int sostGateV[ kMidiChCnt]; // true if the associated sostenuto pedal is down
  1143. unsigned i,j;
  1144. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1145. // initialize the state tracking variables
  1146. for(i=0; i<kMidiChCnt; ++i)
  1147. {
  1148. sustV[i] = NULL;
  1149. sustGateV[i] = 0;
  1150. sostV[i] = NULL;
  1151. sostGateV[i] = 0;
  1152. for(j=0; j<kMidiNoteCnt; ++j)
  1153. {
  1154. noteM[ i*kMidiNoteCnt + j ] = NULL;
  1155. noteGateM[ i*kMidiNoteCnt + j ] = 0;
  1156. sostGateM[ i*kMidiNoteCnt + j ] = false;
  1157. }
  1158. }
  1159. // for each midi event
  1160. for(mi=0; mi<p->msgN; ++mi)
  1161. {
  1162. cmMidiTrackMsg_t* m = (cmMidiTrackMsg_t*)msgV[mi]; // cast away const
  1163. // verify that time is also incrementing
  1164. assert( mi==0 || (mi>0 && m->amicro >= msgV[mi-1]->amicro) );
  1165. // ignore all non-channel messages
  1166. if( !cmMidiIsChStatus( m->status ) )
  1167. continue;
  1168. cmMidiByte_t ch = m->u.chMsgPtr->ch; // get the midi msg channel
  1169. cmMidiByte_t d0 = m->u.chMsgPtr->d0; // get the midi msg data value
  1170. // if this is a note-on msg
  1171. if( cmMidiFileIsNoteOn(m) )
  1172. {
  1173. unsigned k = ch*kMidiNoteCnt + d0;
  1174. // there should be no existing sounding note instance for this pitch
  1175. //if( noteGateM[k] == 0 && noteM[k] != NULL )
  1176. // cmErrWarnMsg(&p->err,kMissingNoteOffMfRC,"%i : Missing note-off instance for note on:%s",m->uid,cmMidiToSciPitch(d0,NULL,0));
  1177. if( noteM[k] != NULL )
  1178. noteGateM[k] += 1;
  1179. else
  1180. {
  1181. noteM[k] = m;
  1182. noteGateM[k] = 1;
  1183. }
  1184. }
  1185. else
  1186. // if this is a note-off msg
  1187. if( cmMidiFileIsNoteOff(m) )
  1188. {
  1189. unsigned k = ch*kMidiNoteCnt + d0;
  1190. cmMidiTrackMsg_t* m0 = noteM[k];
  1191. if( m0 == NULL )
  1192. cmErrWarnMsg(&p->err,kMissingNoteOffMfRC,"%i : Missing note-on instance for note-off:%s",m->uid,cmMidiToSciPitch(d0,NULL,0));
  1193. else
  1194. {
  1195. // a key was released - so it should not already be up
  1196. if( noteGateM[k]==0 )
  1197. cmErrWarnMsg(&p->err,kMissingNoteOffMfRC,"%i : Missing note-on for note-off:%s",m->uid,cmMidiToSciPitch(d0,NULL,0));
  1198. else
  1199. {
  1200. noteGateM[k] -= 1; // update the note gate state
  1201. // update the sounding note status
  1202. if( _cmMidiFileCalcNoteDur(m0, m, noteGateM[k], sustGateV[ch], sostGateM[k]) )
  1203. noteM[k] = NULL;
  1204. }
  1205. }
  1206. }
  1207. else
  1208. // This is a sustain-pedal down msg
  1209. if( cmMidiFileIsSustainPedalDown(m) )
  1210. {
  1211. // if the sustain channel is already down
  1212. //if( sustGateV[ch] )
  1213. // cmErrWarnMsg(&p->err,kSustainPedalMfRC,"%i : The sustain pedal went down twice with no intervening release.",m->uid);
  1214. sustGateV[ch] += 1;
  1215. if( sustV[ch] == NULL )
  1216. sustV[ch] = m;
  1217. }
  1218. else
  1219. // This is a sustain-pedal up msg
  1220. if( cmMidiFileIsSustainPedalUp(m) )
  1221. {
  1222. // if the sustain channel is already up
  1223. if( sustGateV[ch]==0 )
  1224. cmErrWarnMsg(&p->err,kSustainPedalMfRC,"%i : The sustain pedal release message was received with no previous pedal down.",m->uid);
  1225. if( sustGateV[ch] >= 1 )
  1226. {
  1227. sustGateV[ch] -= 1;
  1228. if( sustGateV[ch] == 0 )
  1229. {
  1230. unsigned k = ch*kMidiNoteCnt;
  1231. // for each sounding note on this channel
  1232. for(; k<ch*kMidiNoteCnt+kMidiNoteCnt; ++k)
  1233. if( noteM[k]!=NULL && _cmMidiFileCalcNoteDur(noteM[k], m, noteGateM[k], sustGateV[ch], sostGateM[k]) )
  1234. noteM[k] = NULL;
  1235. if( sustV[ch] != NULL )
  1236. {
  1237. _cmMidiFileSetDur(sustV[ch],m);
  1238. ((cmMidiChMsg_t*)sustV[ch]->u.chMsgPtr)->end = m; // set the pedal-up msg ptr. in the pedal-down msg.
  1239. sustV[ch] = NULL;
  1240. }
  1241. }
  1242. }
  1243. }
  1244. else
  1245. // This is a sostenuto pedal-down msg
  1246. if( cmMidiFileIsSostenutoPedalDown(m) )
  1247. {
  1248. // if the sustain channel is already down
  1249. //if( sostGateV[ch] )
  1250. // cmErrWarnMsg(&p->err,kSostenutoPedalMfRC,"%i : The sostenuto pedal went down twice with no intervening release.",m->uid);
  1251. // record the notes that are active when the sostenuto pedal went down
  1252. unsigned k = ch * kMidiNoteCnt;
  1253. for(i=0; i<kMidiNoteCnt; ++i)
  1254. sostGateM[k+i] = noteGateM[k+i] > 0;
  1255. sostGateV[ch] += 1;
  1256. }
  1257. else
  1258. // This is a sostenuto pedal-up msg
  1259. if( cmMidiFileIsSostenutoPedalUp(m) )
  1260. {
  1261. // if the sustain channel is already up
  1262. if( sostGateV[ch]==0 )
  1263. cmErrWarnMsg(&p->err,kSostenutoPedalMfRC,"%i : The sostenuto pedal release message was received with no previous pedal down.",m->uid);
  1264. if( sostGateV[ch] >= 1 )
  1265. {
  1266. sostGateV[ch] -= 1;
  1267. if( sostGateV[ch] == 0 )
  1268. {
  1269. unsigned k = ch*kMidiNoteCnt;
  1270. // for each note on this channel
  1271. for(; k<ch*kMidiNoteCnt+kMidiNoteCnt; ++k)
  1272. {
  1273. sostGateM[k] = false;
  1274. if( noteM[k]!=NULL && _cmMidiFileCalcNoteDur(noteM[k], m, noteGateM[k], sustGateV[ch], sostGateM[k]) )
  1275. noteM[k] = NULL;
  1276. }
  1277. if( sostV[ch] != NULL )
  1278. {
  1279. _cmMidiFileSetDur(sostV[ch],m);
  1280. ((cmMidiChMsg_t*)sostV[ch]->u.chMsgPtr)->end = m; // set the pedal-up msg ptr. in the pedal-down msg.
  1281. sostV[ch] = NULL;
  1282. }
  1283. }
  1284. }
  1285. }
  1286. } // for each midi file event
  1287. }
  1288. void cmMidiFileSetDelay( cmMidiFileH_t h, unsigned ticks )
  1289. {
  1290. _cmMidiFile_t* p;
  1291. unsigned mi;
  1292. if((p = _cmMidiFileHandleToPtr(h)) == NULL )
  1293. return;
  1294. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1295. if( p->msgN == 0 )
  1296. return;
  1297. for(mi=0; mi<p->msgN; ++mi)
  1298. {
  1299. cmMidiTrackMsg_t* mp = (cmMidiTrackMsg_t*)msgV[mi]; // cast away const
  1300. // locate the first msg which has a non-zero delta tick
  1301. if( mp->dtick > 0 )
  1302. {
  1303. mp->dtick = ticks;
  1304. break;
  1305. }
  1306. }
  1307. }
  1308. unsigned cmMidiFilePackTrackMsgBufByteCount( const cmMidiTrackMsg_t* m )
  1309. { return sizeof(cmMidiTrackMsg_t) + m->byteCnt; }
  1310. cmMidiTrackMsg_t* cmMidiFilePackTrackMsg( const cmMidiTrackMsg_t* m, void* buf, unsigned bufByteCnt )
  1311. {
  1312. unsigned n = sizeof(cmMidiTrackMsg_t) + m->byteCnt;
  1313. if( n < bufByteCnt )
  1314. {
  1315. assert(0);
  1316. return NULL;
  1317. }
  1318. // copy the cmMidiTrackMsg_t into the buffer
  1319. memcpy(buf, m, sizeof(cmMidiTrackMsg_t));
  1320. if( m->byteCnt > 0 )
  1321. {
  1322. // copy any linked data into the buffer
  1323. memcpy(buf + sizeof(cmMidiTrackMsg_t), m->u.voidPtr, m->byteCnt );
  1324. // fixup the linked data ptr
  1325. cmMidiTrackMsg_t* mp = (cmMidiTrackMsg_t*)buf;
  1326. mp->u.voidPtr = buf + sizeof(cmMidiTrackMsg_t);
  1327. }
  1328. return (cmMidiTrackMsg_t*)buf;
  1329. }
  1330. void _cmMidiFilePrintHdr( const _cmMidiFile_t* mfp, cmRpt_t* rpt )
  1331. {
  1332. if( mfp->fn != NULL )
  1333. cmRptPrintf(rpt,"%s ",mfp->fn);
  1334. cmRptPrintf(rpt,"fmt:%i ticksPerQN:%i tracks:%i\n",mfp->fmtId,mfp->ticksPerQN,mfp->trkN);
  1335. cmRptPrintf(rpt," UID dtick atick amicro type ch D0 D1\n");
  1336. cmRptPrintf(rpt,"----- ---------- ---------- ---------- : ---- --- --- ---\n");
  1337. }
  1338. void _cmMidiFilePrintMsg( cmRpt_t* rpt, const cmMidiTrackMsg_t* tmp )
  1339. {
  1340. cmRptPrintf(rpt,"%5i %10u %10llu %10llu : ",
  1341. tmp->uid,
  1342. tmp->dtick,
  1343. tmp->atick,
  1344. tmp->amicro );
  1345. if( tmp->status == kMetaStId )
  1346. {
  1347. cmRptPrintf(rpt,"%s ", cmMidiMetaStatusToLabel(tmp->metaId));
  1348. }
  1349. else
  1350. {
  1351. cmRptPrintf(rpt,"%4s %3i %3i %3i",
  1352. cmMidiStatusToLabel(tmp->status),
  1353. tmp->u.chMsgPtr->ch,
  1354. tmp->u.chMsgPtr->d0,
  1355. tmp->u.chMsgPtr->d1);
  1356. }
  1357. if( cmMidiIsChStatus(tmp->status) && cmMidiIsNoteOn(tmp->status) && (tmp->u.chMsgPtr->d1>0) )
  1358. cmRptPrintf(rpt," %4s ",cmMidiToSciPitch(tmp->u.chMsgPtr->d0,NULL,0));
  1359. cmRptPrintf(rpt,"\n");
  1360. }
  1361. void cmMidiFilePrintMsgs( cmMidiFileH_t h, cmRpt_t* rpt )
  1362. {
  1363. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(h);
  1364. unsigned mi;
  1365. _cmMidiFilePrintHdr(p,rpt);
  1366. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1367. for(mi=0; mi<p->msgN; ++mi)
  1368. {
  1369. const cmMidiTrackMsg_t* mp = msgV[mi];
  1370. if( mp != NULL )
  1371. _cmMidiFilePrintMsg(rpt,mp);
  1372. }
  1373. }
  1374. void cmMidiFilePrintTracks( cmMidiFileH_t h, unsigned trkIdx, cmRpt_t* rpt )
  1375. {
  1376. const _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  1377. _cmMidiFilePrintHdr(mfp,rpt);
  1378. int i = trkIdx == cmInvalidIdx ? 0 : trkIdx;
  1379. int n = trkIdx == cmInvalidIdx ? mfp->trkN : trkIdx+1;
  1380. for(; i<n; ++i)
  1381. {
  1382. cmRptPrintf(rpt,"Track:%i\n",i);
  1383. cmMidiTrackMsg_t* tmp = mfp->trkV[i].base;
  1384. while( tmp != NULL )
  1385. {
  1386. _cmMidiFilePrintMsg(rpt,tmp);
  1387. tmp = tmp->link;
  1388. }
  1389. }
  1390. }
  1391. void cmMidiFileTestPrint( void* printDataPtr, const char* fmt, va_list vl )
  1392. { vprintf(fmt,vl); }
  1393. cmMfRC_t cmMidiFileGenPlotFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmChar_t* outFn )
  1394. {
  1395. cmMfRC_t rc = kOkMfRC;
  1396. cmMidiFileH_t mfH = cmMidiFileNullHandle;
  1397. cmFileH_t fH = cmFileNullHandle;
  1398. unsigned i = 0;
  1399. const cmMidiTrackMsg_t** m = NULL;
  1400. unsigned mN = 0;
  1401. if((rc = cmMidiFileOpen(ctx, &mfH, midiFn )) != kOkMfRC )
  1402. return cmErrMsg(&ctx->err,rc,"The MIDI file object could not be opened from '%s'.",cmStringNullGuard(midiFn));
  1403. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(mfH);
  1404. if( (m = cmMidiFileMsgArray(mfH)) == NULL || (mN = cmMidiFileMsgCount(mfH)) == 0 )
  1405. {
  1406. rc = cmErrMsg(&p->err,kFileFailMfRC,"The MIDI file object appears to be empty.");
  1407. goto errLabel;
  1408. }
  1409. cmMidiFileCalcNoteDurations( mfH );
  1410. if( cmFileOpen(&fH,outFn,kWriteFileFl,p->err.rpt) != kOkFileRC )
  1411. return cmErrMsg(&p->err,kFileFailMfRC,"Unable to create the file '%s'.",cmStringNullGuard(outFn));
  1412. for(i=0; i<mN; ++i)
  1413. if( (m[i]!=NULL) && cmMidiIsChStatus(m[i]->status) && cmMidiIsNoteOn(m[i]->status) && (m[i]->u.chMsgPtr->d1>0) )
  1414. 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));
  1415. errLabel:
  1416. cmMidiFileClose(&mfH);
  1417. cmFileClose(&fH);
  1418. return rc;
  1419. }
  1420. void cmMidiFilePrintControlNumbers( cmCtx_t* ctx, const char* fn )
  1421. {
  1422. cmMidiFileH_t h = cmMidiFileNullHandle;
  1423. cmMfRC_t rc;
  1424. if((rc = cmMidiFileOpen(ctx, &h, fn )) != kOkMfRC )
  1425. {
  1426. cmErrMsg(&ctx->err,rc,"MIDI file open failed on '%s'.",fn);
  1427. goto errLabel;
  1428. }
  1429. const cmMidiTrackMsg_t** mm;
  1430. unsigned n = cmMidiFileMsgCount(h);
  1431. if((mm = cmMidiFileMsgArray(h)) != NULL )
  1432. {
  1433. unsigned j;
  1434. for(j=0; j<n; ++j)
  1435. {
  1436. const cmMidiTrackMsg_t* m = mm[j];
  1437. if( m->status == kCtlMdId && m->u.chMsgPtr->d0==66 )
  1438. printf("%i %i\n",m->u.chMsgPtr->d0,m->u.chMsgPtr->d1);
  1439. }
  1440. }
  1441. errLabel:
  1442. cmMidiFileClose(&h);
  1443. }
  1444. void cmMidiFileTest( const char* fn, cmCtx_t* ctx )
  1445. {
  1446. cmMfRC_t rc;
  1447. cmMidiFileH_t h = cmMidiFileNullHandle;
  1448. if((rc = cmMidiFileOpen(ctx,&h,fn)) != kOkMfRC )
  1449. {
  1450. printf("Error:%i Unable to open the cmMidi file: %s\n",rc,fn);
  1451. return;
  1452. }
  1453. cmMidiFileCalcNoteDurations( h );
  1454. if( 1 )
  1455. {
  1456. //cmMidiFileTickToMicros( h );
  1457. //cmMidiFileTickToSamples(h,96000,false);
  1458. cmMidiFilePrintMsgs(h,&ctx->rpt);
  1459. }
  1460. if( 0 )
  1461. {
  1462. //cmMidiFilePrint(h,cmMidiFileTrackCount(h)-1,&ctx->rpt);
  1463. //cmMidiFilePrint(h,cmInvalidIdx,&ctx->rpt);
  1464. cmMidiFilePrintControlNumbers(ctx, fn );
  1465. }
  1466. if( 0 )
  1467. {
  1468. printf("Tracks:%i\n",cmMidiFileTrackCount(h));
  1469. unsigned i = 0;
  1470. for(i=0; i<cmMidiFileMsgCount(h); ++i)
  1471. {
  1472. cmMidiTrackMsg_t* tmp = (cmMidiTrackMsg_t*)cmMidiFileMsgArray(h)[i];
  1473. if( tmp->status==kMetaStId && tmp->metaId == kTempoMdId )
  1474. {
  1475. double bpm = 60000000.0/tmp->u.iVal;
  1476. printf("Tempo:%i %f\n",tmp->u.iVal,bpm);
  1477. tmp->u.iVal = floor( 60000000.0/69.0 );
  1478. break;
  1479. }
  1480. }
  1481. cmMidiFileWrite(h,"/home/kevin/temp/test0.mid");
  1482. }
  1483. cmMidiFileClose(&h);
  1484. }