libcm is a C development framework with an emphasis on audio signal processing applications.
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cmMidiFile.c 52KB

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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 byte cnt:%i.",tmp->status,tmp->status,byteN);
  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("%5i st:%i 0x%x\n",dticks,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. mfp->msgVDirtyFl = false;
  412. // get the total trk msg count
  413. mfp->msgN = 0;
  414. for(trkIdx=0; trkIdx<mfp->trkN; ++trkIdx)
  415. mfp->msgN += mfp->trkV[ trkIdx ].cnt;
  416. // allocate the trk msg index vector: msgV[]
  417. mfp->msgV = cmMemResizeZ(cmMidiTrackMsg_t*, mfp->msgV, mfp->msgN);
  418. // store a pointer to every trk msg in msgV[]
  419. for(i=0,j=0; i<mfp->trkN; ++i)
  420. {
  421. cmMidiTrackMsg_t* m = mfp->trkV[i].base;
  422. for(; m!=NULL; m=m->link)
  423. {
  424. assert( j < mfp->msgN );
  425. mfp->msgV[j++] = m;
  426. }
  427. }
  428. // set the atick value in each msg
  429. _cmMidiFileSetAccumulateTicks(mfp);
  430. // sort msgV[] in ascending order on atick
  431. qsort( mfp->msgV, mfp->msgN, sizeof(cmMidiTrackMsg_t*), _cmMidiFileSortFunc );
  432. // set the amicro value in each msg
  433. _cmMidiFileSetAbsoluteTime(mfp);
  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. {
  517. _cmMidiFileClose(p);
  518. hp->h = NULL;
  519. }
  520. return rc;
  521. }
  522. cmMfRC_t cmMidiFileCreate( cmCtx_t* ctx, cmMidiFileH_t* hp, unsigned trkN, unsigned ticksPerQN )
  523. {
  524. cmMfRC_t rc = kOkMfRC;
  525. if((rc = _cmMidiFileCreate(ctx,hp)) != kOkMfRC )
  526. return rc;
  527. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(*hp);
  528. p->ticksPerQN = ticksPerQN;
  529. p->fmtId = 1;
  530. p->trkN = trkN;
  531. p->trkV = cmLhAllocZ(p->lhH, _cmMidiTrack_t, p->trkN);
  532. return rc;
  533. }
  534. cmMfRC_t cmMidiFileClose( cmMidiFileH_t* hp )
  535. {
  536. cmMfRC_t rc = kOkMfRC;
  537. if( hp==NULL || cmMidiFileIsValid(*hp)==false )
  538. return kOkMfRC;
  539. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(*hp);
  540. if((rc = _cmMidiFileClose(p)) != kOkMfRC )
  541. return rc;
  542. hp->h = NULL;
  543. return rc;
  544. }
  545. cmMfRC_t _cmMidiFileWrite8( _cmMidiFile_t* mfp, unsigned char v )
  546. {
  547. cmMfRC_t rc = kOkMfRC;
  548. if( cmFileWriteUChar(mfp->fh,&v,1) != kOkFileRC )
  549. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file byte write failed.");
  550. return rc;
  551. }
  552. cmMfRC_t _cmMidiFileWrite16( _cmMidiFile_t* mfp, unsigned short v )
  553. {
  554. cmMfRC_t rc = kOkMfRC;
  555. v = mfSwap16(v);
  556. if( cmFileWriteUShort(mfp->fh,&v,1) != kOkFileRC )
  557. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file short integer write failed.");
  558. return rc;
  559. }
  560. cmMfRC_t _cmMidiFileWrite24( _cmMidiFile_t* mfp, unsigned v )
  561. {
  562. cmMfRC_t rc = kOkMfRC;
  563. unsigned mask = 0xff0000;
  564. int i;
  565. for(i = 2; i>=0; --i)
  566. {
  567. unsigned char c = (v & mask) >> (i*8);
  568. mask >>= 8;
  569. if( cmFileWriteUChar(mfp->fh,&c,1) != kOkFileRC )
  570. {
  571. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file 24 bit integer write failed.");
  572. goto errLabel;
  573. }
  574. }
  575. errLabel:
  576. return rc;
  577. }
  578. cmMfRC_t _cmMidiFileWrite32( _cmMidiFile_t* mfp, unsigned v )
  579. {
  580. cmMfRC_t rc = kOkMfRC;
  581. v = mfSwap32(v);
  582. if( cmFileWriteUInt(mfp->fh,&v,1) != kOkFileRC )
  583. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file integer write failed.");
  584. return rc;
  585. }
  586. cmMfRC_t _cmMidiFileWriteRecd( _cmMidiFile_t* mfp, const void* v, unsigned byteCnt )
  587. {
  588. cmMfRC_t rc = kOkMfRC;
  589. if( cmFileWriteChar(mfp->fh,v,byteCnt) != kOkFileRC )
  590. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file write record failed.");
  591. return rc;
  592. }
  593. cmMfRC_t _cmMidiFileWriteVarLen( _cmMidiFile_t* mfp, unsigned v )
  594. {
  595. cmMfRC_t rc = kOkMfRC;
  596. unsigned buf = v & 0x7f;
  597. while((v >>= 7) > 0 )
  598. {
  599. buf <<= 8;
  600. buf |= 0x80;
  601. buf += (v & 0x7f);
  602. }
  603. while(1)
  604. {
  605. unsigned char c = (unsigned char)(buf & 0xff);
  606. if( cmFileWriteUChar(mfp->fh,&c,1) != kOkFileRC )
  607. {
  608. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"MIDI file variable length integer write failed.");
  609. goto errLabel;
  610. }
  611. if( buf & 0x80 )
  612. buf >>= 8;
  613. else
  614. break;
  615. }
  616. errLabel:
  617. return rc;
  618. }
  619. cmMfRC_t _cmMidiFileWriteHdr( _cmMidiFile_t* mfp )
  620. {
  621. cmMfRC_t rc;
  622. unsigned fileId = 'MThd';
  623. unsigned chunkByteN = 6;
  624. // write the file id ('MThd')
  625. if((rc = _cmMidiFileWrite32(mfp,fileId)) != kOkMfRC )
  626. return rc;
  627. // write the file chunk byte count (always 6)
  628. if((rc = _cmMidiFileWrite32(mfp,chunkByteN)) != kOkMfRC )
  629. return rc;
  630. // write the MIDI file format id (0,1,2)
  631. if((rc = _cmMidiFileWrite16(mfp,mfp->fmtId)) != kOkMfRC )
  632. return rc;
  633. // write the track count
  634. if((rc = _cmMidiFileWrite16(mfp,mfp->trkN)) != kOkMfRC )
  635. return rc;
  636. unsigned short v = 0;
  637. // if the ticks per quarter note field is valid ...
  638. if( mfp->ticksPerQN )
  639. v = mfp->ticksPerQN;
  640. else
  641. {
  642. // ... otherwise the division field was given in smpte
  643. v = mfp->smpteFmtId << 8;
  644. v += mfp->smpteTicksPerFrame;
  645. }
  646. if((rc = _cmMidiFileWrite16(mfp,v)) != kOkMfRC )
  647. return rc;
  648. return rc;
  649. }
  650. cmMfRC_t _cmMidiFileWriteSysEx( _cmMidiFile_t* mfp, cmMidiTrackMsg_t* tmp )
  651. {
  652. cmMfRC_t rc = kOkMfRC;
  653. if((rc = _cmMidiFileWrite8(mfp,kSysExMdId)) != kOkMfRC )
  654. goto errLabel;
  655. if( cmFileWriteUChar(mfp->fh,tmp->u.sysExPtr,tmp->byteCnt) != kOkFileRC )
  656. rc = cmErrMsg(&mfp->err,kFileFailMfRC,"Sys-ex msg write failed.");
  657. errLabel:
  658. return rc;
  659. }
  660. cmMfRC_t _cmMidiFileWriteChannelMsg( _cmMidiFile_t* mfp, const cmMidiTrackMsg_t* tmp, cmMidiByte_t* runStatus )
  661. {
  662. cmMfRC_t rc = kOkMfRC;
  663. unsigned byteN = cmMidiStatusToByteCount(tmp->status);
  664. cmMidiByte_t status = tmp->status + tmp->u.chMsgPtr->ch;
  665. if( status != *runStatus )
  666. {
  667. *runStatus = status;
  668. if((rc = _cmMidiFileWrite8(mfp,status)) != kOkMfRC )
  669. goto errLabel;
  670. }
  671. if(byteN>=1)
  672. if((rc = _cmMidiFileWrite8(mfp,tmp->u.chMsgPtr->d0)) != kOkMfRC )
  673. goto errLabel;
  674. if(byteN>=2)
  675. if((rc = _cmMidiFileWrite8(mfp,tmp->u.chMsgPtr->d1)) != kOkMfRC )
  676. goto errLabel;
  677. errLabel:
  678. return rc;
  679. }
  680. cmMfRC_t _cmMidiFileWriteMetaMsg( _cmMidiFile_t* mfp, const cmMidiTrackMsg_t* tmp )
  681. {
  682. cmMfRC_t rc;
  683. if((rc = _cmMidiFileWrite8(mfp,kMetaStId)) != kOkMfRC )
  684. return rc;
  685. if((rc = _cmMidiFileWrite8(mfp,tmp->metaId)) != kOkMfRC )
  686. return rc;
  687. switch( tmp->metaId )
  688. {
  689. case kSeqNumbMdId:
  690. if((rc = _cmMidiFileWrite8(mfp,sizeof(tmp->u.sVal))) == kOkMfRC )
  691. rc = _cmMidiFileWrite16(mfp,tmp->u.sVal);
  692. break;
  693. case kTempoMdId:
  694. if((rc = _cmMidiFileWrite8(mfp,3)) == kOkMfRC )
  695. rc = _cmMidiFileWrite24(mfp,tmp->u.iVal);
  696. break;
  697. case kSmpteMdId:
  698. if((rc = _cmMidiFileWrite8(mfp,sizeof(cmMidiSmpte_t))) == kOkMfRC )
  699. rc = _cmMidiFileWriteRecd(mfp,tmp->u.smptePtr,sizeof(cmMidiSmpte_t));
  700. break;
  701. case kTimeSigMdId:
  702. if((rc = _cmMidiFileWrite8(mfp,sizeof(cmMidiTimeSig_t))) == kOkMfRC )
  703. rc = _cmMidiFileWriteRecd(mfp,tmp->u.timeSigPtr,sizeof(cmMidiTimeSig_t));
  704. break;
  705. case kKeySigMdId:
  706. if((rc = _cmMidiFileWrite8(mfp,sizeof(cmMidiKeySig_t))) == kOkMfRC )
  707. rc = _cmMidiFileWriteRecd(mfp,tmp->u.keySigPtr,sizeof(cmMidiKeySig_t));
  708. break;
  709. case kSeqSpecMdId:
  710. if((rc = _cmMidiFileWriteVarLen(mfp,sizeof(tmp->byteCnt))) == kOkMfRC )
  711. rc = _cmMidiFileWriteRecd(mfp,tmp->u.sysExPtr,tmp->byteCnt);
  712. break;
  713. case kMidiChMdId:
  714. if((rc = _cmMidiFileWrite8(mfp,sizeof(tmp->u.bVal))) == kOkMfRC )
  715. rc = _cmMidiFileWrite8(mfp,tmp->u.bVal);
  716. break;
  717. case kEndOfTrkMdId:
  718. rc = _cmMidiFileWrite8(mfp,0);
  719. break;
  720. case kTextMdId:
  721. case kCopyMdId:
  722. case kTrkNameMdId:
  723. case kInstrNameMdId:
  724. case kLyricsMdId:
  725. case kMarkerMdId:
  726. case kCuePointMdId:
  727. {
  728. unsigned n = tmp->u.text==NULL ? 0 : strlen(tmp->u.text);
  729. if((rc = _cmMidiFileWriteVarLen(mfp,n)) == kOkMfRC && n>0 )
  730. rc = _cmMidiFileWriteRecd(mfp,tmp->u.text,n);
  731. }
  732. break;
  733. default:
  734. {
  735. // ignore unknown meta messages
  736. }
  737. }
  738. return rc;
  739. }
  740. cmMfRC_t _cmMidiFileInsertEotMsg( _cmMidiFile_t* p, unsigned trkIdx )
  741. {
  742. _cmMidiTrack_t* trk = p->trkV + trkIdx;
  743. cmMidiTrackMsg_t* m0 = NULL;
  744. cmMidiTrackMsg_t* m = trk->base;
  745. // locate the current EOT msg on this track
  746. for(; m!=NULL; m=m->link)
  747. {
  748. if( m->status == kMetaStId && m->metaId == kEndOfTrkMdId )
  749. {
  750. // If this EOT msg is the last msg in the track ...
  751. if( m->link == NULL )
  752. {
  753. assert( m == trk->last );
  754. return kOkMfRC; // ... then there is nothing else to do
  755. }
  756. // If this EOT msg is not the last in the track ...
  757. if( m0 != NULL )
  758. m0->link = m->link; // ... then unlink it
  759. break;
  760. }
  761. m0 = m;
  762. }
  763. // if we get here then the last msg in the track was not an EOT msg
  764. // if there was no previously allocated EOT msg
  765. if( m == NULL )
  766. {
  767. m = _cmMidiFileAllocMsg(p, trkIdx, 1, kMetaStId );
  768. m->metaId = kEndOfTrkMdId;
  769. trk->cnt += 1;
  770. }
  771. // link an EOT msg as the last msg on the track
  772. // if the track is currently empty
  773. if( m0 == NULL )
  774. {
  775. trk->base = m;
  776. trk->last = m;
  777. }
  778. else // link the msg as the last on on the track
  779. {
  780. assert( m0 == trk->last);
  781. m0->link = m;
  782. m->link = NULL;
  783. trk->last = m;
  784. }
  785. return kOkMfRC;
  786. }
  787. cmMfRC_t _cmMidiFileWriteTrack( _cmMidiFile_t* mfp, unsigned trkIdx )
  788. {
  789. cmMfRC_t rc = kOkMfRC;
  790. cmMidiTrackMsg_t* tmp = mfp->trkV[trkIdx].base;
  791. cmMidiByte_t runStatus = 0;
  792. // be sure there is a EOT msg at the end of this track
  793. if((rc = _cmMidiFileInsertEotMsg(mfp, trkIdx )) != kOkMfRC )
  794. return rc;
  795. for(; tmp != NULL; tmp=tmp->link)
  796. {
  797. // write the msg tick count
  798. if((rc = _cmMidiFileWriteVarLen(mfp,tmp->dtick)) != kOkMfRC )
  799. return rc;
  800. // switch on status
  801. switch( tmp->status )
  802. {
  803. // handle sys-ex msg
  804. case kSysExMdId:
  805. rc = _cmMidiFileWriteSysEx(mfp,tmp);
  806. break;
  807. // handle meta msg
  808. case kMetaStId:
  809. rc = _cmMidiFileWriteMetaMsg(mfp,tmp);
  810. break;
  811. default:
  812. // handle channel msg
  813. rc = _cmMidiFileWriteChannelMsg(mfp,tmp,&runStatus);
  814. }
  815. }
  816. return rc;
  817. }
  818. cmMfRC_t cmMidiFileWrite( cmMidiFileH_t h, const char* fn )
  819. {
  820. cmMfRC_t rc = kOkMfRC;
  821. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  822. unsigned i;
  823. // create the output file
  824. if( cmFileOpen(&mfp->fh,fn,kWriteFileFl,mfp->err.rpt) != kOkFileRC )
  825. return cmErrMsg(&mfp->err,kFileFailMfRC,"The MIDI file '%s' could not be created.",cmStringNullGuard(fn));
  826. // write the file header
  827. if((rc = _cmMidiFileWriteHdr(mfp)) != kOkMfRC )
  828. {
  829. rc = cmErrMsg(&mfp->err,rc,"The file header write failed on the MIDI file '%s'.",cmStringNullGuard(fn));
  830. goto errLabel;
  831. }
  832. for(i=0; i < mfp->trkN; ++i )
  833. {
  834. unsigned chkId = 'MTrk';
  835. long offs0,offs1;
  836. // write the track chunk id ('MTrk')
  837. if((rc = _cmMidiFileWrite32(mfp,chkId)) != kOkMfRC )
  838. goto errLabel;
  839. cmFileTell(mfp->fh,&offs0);
  840. // write the track chunk size as zero
  841. if((rc = _cmMidiFileWrite32(mfp,0)) != kOkMfRC )
  842. goto errLabel;
  843. if((rc = _cmMidiFileWriteTrack(mfp,i)) != kOkMfRC )
  844. goto errLabel;
  845. cmFileTell(mfp->fh,&offs1);
  846. cmFileSeek(mfp->fh,kBeginFileFl,offs0);
  847. _cmMidiFileWrite32(mfp,offs1-offs0-4);
  848. cmFileSeek(mfp->fh,kBeginFileFl,offs1);
  849. }
  850. errLabel:
  851. cmFileClose(&mfp->fh);
  852. return rc;
  853. }
  854. bool cmMidiFileIsValid( cmMidiFileH_t h )
  855. { return h.h != NULL; }
  856. unsigned cmMidiFileTrackCount( cmMidiFileH_t h )
  857. {
  858. _cmMidiFile_t* mfp;
  859. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  860. return cmInvalidCnt;
  861. return mfp->trkN;
  862. }
  863. unsigned cmMidiFileType( cmMidiFileH_t h )
  864. {
  865. _cmMidiFile_t* mfp;
  866. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  867. return cmInvalidId;
  868. return mfp->fmtId;
  869. }
  870. const char* cmMidiFileName( cmMidiFileH_t h )
  871. {
  872. _cmMidiFile_t* mfp;
  873. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  874. return NULL;
  875. return mfp->fn;
  876. }
  877. unsigned cmMidiFileTicksPerQN( cmMidiFileH_t h )
  878. {
  879. _cmMidiFile_t* mfp;
  880. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  881. return cmInvalidCnt;
  882. return mfp->ticksPerQN;
  883. }
  884. cmMidiByte_t cmMidiFileTicksPerSmpteFrame( cmMidiFileH_t h )
  885. {
  886. _cmMidiFile_t* mfp;
  887. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  888. return kInvalidMidiByte;
  889. if( mfp->ticksPerQN != 0 )
  890. return 0;
  891. return mfp->smpteTicksPerFrame;
  892. }
  893. cmMidiByte_t cmMidiFileSmpteFormatId( cmMidiFileH_t h )
  894. {
  895. _cmMidiFile_t* mfp;
  896. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  897. return kInvalidMidiByte;
  898. if( mfp->ticksPerQN != 0 )
  899. return 0;
  900. return mfp->smpteFmtId;
  901. }
  902. unsigned cmMidiFileTrackMsgCount( cmMidiFileH_t h, unsigned trackIdx )
  903. {
  904. _cmMidiFile_t* mfp;
  905. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  906. return cmInvalidCnt;
  907. return mfp->trkV[trackIdx].cnt;
  908. }
  909. const cmMidiTrackMsg_t* cmMidiFileTrackMsg( cmMidiFileH_t h, unsigned trackIdx )
  910. {
  911. _cmMidiFile_t* mfp;
  912. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  913. return NULL;
  914. return mfp->trkV[trackIdx].base;
  915. }
  916. unsigned cmMidiFileMsgCount( cmMidiFileH_t h )
  917. {
  918. _cmMidiFile_t* mfp;
  919. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  920. return cmInvalidCnt;
  921. return mfp->msgN;
  922. }
  923. const cmMidiTrackMsg_t** cmMidiFileMsgArray( cmMidiFileH_t h )
  924. {
  925. _cmMidiFile_t* mfp;
  926. if((mfp = _cmMidiFileHandleToPtr(h)) == NULL )
  927. return NULL;
  928. return _cmMidiFileMsgArray(mfp);
  929. }
  930. cmMidiTrackMsg_t* _cmMidiFileUidToMsg( _cmMidiFile_t* mfp, unsigned uid )
  931. {
  932. unsigned i;
  933. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(mfp);
  934. for(i=0; i<mfp->msgN; ++i)
  935. if( msgV[i]->uid == uid )
  936. return (cmMidiTrackMsg_t*)msgV[i];
  937. return NULL;
  938. }
  939. cmMfRC_t cmMidiFileSetVelocity( cmMidiFileH_t h, unsigned uid, cmMidiByte_t vel )
  940. {
  941. cmMidiTrackMsg_t* r;
  942. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  943. assert( mfp != NULL );
  944. if((r = _cmMidiFileUidToMsg(mfp,uid)) == NULL )
  945. return cmErrMsg(&mfp->err,kUidNotFoundMfRC,"The MIDI file uid %i could not be found.",uid);
  946. if( cmMidiIsNoteOn(r->status) == false && cmMidiIsNoteOff(r->status,0)==false )
  947. return cmErrMsg(&mfp->err,kUidNotANoteMsgMfRC,"Cannot set velocity on a non-Note-On/Off msg.");
  948. cmMidiChMsg_t* chm = (cmMidiChMsg_t*)r->u.chMsgPtr;
  949. chm->d1 = vel;
  950. return kOkMfRC;
  951. }
  952. // Returns NULL if uid is not found or if it the first msg on the track.
  953. cmMidiTrackMsg_t* _cmMidiFileMsgBeforeUid( _cmMidiFile_t* p, unsigned uid )
  954. {
  955. cmMidiTrackMsg_t* m;
  956. if((m = _cmMidiFileUidToMsg(p,uid)) == NULL )
  957. return NULL;
  958. assert( m->trkIdx < p->trkN );
  959. cmMidiTrackMsg_t* m0 = NULL;
  960. cmMidiTrackMsg_t* m1 = p->trkV[ m->trkIdx ].base;
  961. for(; m1!=NULL; m1 = m1->link)
  962. {
  963. if( m1->uid == uid )
  964. break;
  965. m0 = m1;
  966. }
  967. return m0;
  968. }
  969. unsigned _cmMidiFileIsMsgFirstOnTrack( _cmMidiFile_t* p, unsigned uid )
  970. {
  971. unsigned i;
  972. for(i=0; i<p->trkN; ++i)
  973. if( p->trkV[i].base!=NULL && p->trkV[i].base->uid == uid )
  974. return i;
  975. return cmInvalidIdx;
  976. }
  977. cmMfRC_t cmMidiFileInsertMsg( cmMidiFileH_t h, unsigned uid, int dtick, cmMidiByte_t ch, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 )
  978. {
  979. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  980. assert( mfp != NULL );
  981. cmMidiTrackMsg_t* ref = NULL;
  982. unsigned trkIdx = cmInvalidIdx;
  983. // if dtick is positive ...
  984. if( dtick >= 0 )
  985. {
  986. ref = _cmMidiFileUidToMsg(mfp,uid); // ... then get the ref. msg.
  987. trkIdx = ref->trkIdx;
  988. }
  989. else // if dtick is negative ...
  990. {
  991. // ... get get the msg before the ref. msg.
  992. if((ref = _cmMidiFileMsgBeforeUid(mfp,uid)) != NULL )
  993. trkIdx = ref->trkIdx;
  994. else
  995. {
  996. // ... the ref. msg was first in the track so there is no msg before it
  997. trkIdx = _cmMidiFileIsMsgFirstOnTrack(mfp,uid);
  998. }
  999. }
  1000. // verify that the reference msg was found
  1001. if( trkIdx == cmInvalidIdx )
  1002. return cmErrMsg(&mfp->err,kUidNotFoundMfRC,"The UID (%i) reference note could not be located.",uid);
  1003. assert( trkIdx < mfp->trkN );
  1004. // complete the msg setup
  1005. _cmMidiTrack_t* trk = mfp->trkV + trkIdx;
  1006. cmMidiTrackMsg_t* m = _cmMidiFileAllocMsg(mfp, trkIdx, abs(dtick), status );
  1007. cmMidiChMsg_t* c = cmLhAllocZ(mfp->lhH,cmMidiChMsg_t,1);
  1008. m->u.chMsgPtr = c;
  1009. c->ch = ch;
  1010. c->d0 = d0;
  1011. c->d1 = d1;
  1012. // if 'm' is prior to the first msg in the track
  1013. if( ref == NULL )
  1014. {
  1015. // ... then make 'm' the first msg in the first msg
  1016. m->link = trk->base;
  1017. trk->base = m;
  1018. // 'm' is before ref and the track cannot be empty (because ref is in it) 'm'
  1019. // can never be the last msg in the list
  1020. }
  1021. else // ref is the msg before 'm'
  1022. {
  1023. m->link = ref->link;
  1024. ref->link = m;
  1025. // if ref was the last msg in the trk ...
  1026. if( trk->last == ref )
  1027. trk->last = m; //... then 'm' is now the last msg in the trk
  1028. }
  1029. trk->cnt += 1;
  1030. mfp->msgVDirtyFl = true;
  1031. return kOkMfRC;
  1032. }
  1033. cmMfRC_t cmMidiFileInsertTrackMsg( cmMidiFileH_t h, unsigned trkIdx, const cmMidiTrackMsg_t* msg, unsigned* uidRef )
  1034. {
  1035. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(h);
  1036. if( uidRef != NULL )
  1037. *uidRef = cmInvalidId;
  1038. // validate the track index
  1039. if( trkIdx >= p->trkN )
  1040. return cmErrMsg(&p->err,kInvalidTrkIndexMfRC,"The track index (%i) is invalid.",trkIdx);
  1041. // allocate a new track record
  1042. cmMidiTrackMsg_t* m = (cmMidiTrackMsg_t*)cmLhAllocZ(p->lhH,char,sizeof(cmMidiTrackMsg_t)+msg->byteCnt);
  1043. // fill the track record
  1044. m->uid = p->nextUid++;
  1045. m->atick = msg->atick;
  1046. m->status = msg->status;
  1047. m->metaId = msg->metaId;
  1048. m->trkIdx = trkIdx;
  1049. m->byteCnt = msg->byteCnt;
  1050. memcpy(&m->u,&msg->u,sizeof(msg->u));
  1051. // copy the exernal data
  1052. if( msg->byteCnt > 0 )
  1053. {
  1054. m->u.voidPtr = (m+1);
  1055. memcpy((void*)m->u.voidPtr,msg->u.voidPtr,msg->byteCnt);
  1056. }
  1057. if( uidRef != NULL )
  1058. *uidRef = m->uid;
  1059. cmMidiTrackMsg_t* m0 = NULL; // msg before insertion
  1060. cmMidiTrackMsg_t* m1 = p->trkV[trkIdx].base; // msg after insertion
  1061. // locate the track record before and after the new msg based on 'atick' value
  1062. for(; m1!=NULL; m1=m1->link)
  1063. {
  1064. if( m1->atick > m->atick )
  1065. {
  1066. if( m0 == NULL )
  1067. p->trkV[trkIdx].base = m;
  1068. else
  1069. m0->link = m;
  1070. m->link = m1;
  1071. break;
  1072. }
  1073. m0 = m1;
  1074. }
  1075. // if the new track record was not inserted then it is the last msg
  1076. if( m1 == NULL )
  1077. {
  1078. assert(m0 == p->trkV[trkIdx].last);
  1079. // link in the new msg
  1080. if( m0 != NULL )
  1081. m0->link = m;
  1082. // the new msg always becomes the last msg
  1083. p->trkV[trkIdx].last = m;
  1084. // if the new msg is the first msg inserted in this track
  1085. if( p->trkV[trkIdx].base == NULL )
  1086. p->trkV[trkIdx].base = m;
  1087. }
  1088. // set the dtick field of the new msg
  1089. if( m0 != NULL )
  1090. {
  1091. assert( m->atick >= m0->atick );
  1092. m->dtick = m->atick - m0->atick;
  1093. }
  1094. // update the dtick field of the msg following the new msg
  1095. if( m1 != NULL )
  1096. {
  1097. assert( m1->atick >= m->atick );
  1098. m1->dtick = m1->atick - m->atick;
  1099. }
  1100. p->trkV[trkIdx].cnt += 1;
  1101. p->msgVDirtyFl = true;
  1102. return kOkMfRC;
  1103. }
  1104. cmMfRC_t cmMidiFileInsertTrackChMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1, unsigned* uidRef )
  1105. {
  1106. cmMidiTrackMsg_t m;
  1107. cmMidiChMsg_t cm;
  1108. memset(&m,0,sizeof(m));
  1109. memset(&cm,0,sizeof(cm));
  1110. cm.ch = status & 0x0f;
  1111. cm.d0 = d0;
  1112. cm.d1 = d1;
  1113. m.atick = atick;
  1114. m.status = status & 0xf0;
  1115. m.byteCnt = sizeof(cm);
  1116. m.u.chMsgPtr = &cm;
  1117. assert( m.status >= kNoteOffMdId && m.status <= kPbendMdId );
  1118. return cmMidiFileInsertTrackMsg(h,trkIdx,&m,uidRef);
  1119. }
  1120. cmMfRC_t cmMidFileInsertTrackTempoMsg( cmMidiFileH_t h, unsigned trkIdx, unsigned atick, unsigned bpm, unsigned* uidRef )
  1121. {
  1122. cmMidiTrackMsg_t m;
  1123. memset(&m,0,sizeof(m));
  1124. m.atick = atick;
  1125. m.status = kMetaStId;
  1126. m.metaId = kTempoMdId;
  1127. m.u.iVal = 60000000/bpm; // convert BPM to microsPerQN
  1128. return cmMidiFileInsertTrackMsg(h,trkIdx,&m,uidRef);
  1129. }
  1130. unsigned cmMidiFileSeekUsecs( cmMidiFileH_t h, unsigned long long offsUSecs, unsigned* msgUsecsPtr, unsigned* microsPerTickPtr )
  1131. {
  1132. _cmMidiFile_t* p;
  1133. if((p = _cmMidiFileHandleToPtr(h)) == NULL )
  1134. return cmInvalidIdx;
  1135. if( p->msgN == 0 )
  1136. return cmInvalidIdx;
  1137. unsigned mi;
  1138. double microsPerQN = 60000000.0/120.0;
  1139. double microsPerTick = microsPerQN / p->ticksPerQN;
  1140. double accUSecs = 0;
  1141. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1142. for(mi=0; mi<p->msgN; ++mi)
  1143. {
  1144. const cmMidiTrackMsg_t* mp = msgV[mi];
  1145. if( mp->amicro >= offsUSecs )
  1146. break;
  1147. }
  1148. if( mi == p->msgN )
  1149. return cmInvalidIdx;
  1150. if( msgUsecsPtr != NULL )
  1151. *msgUsecsPtr = round(accUSecs - offsUSecs);
  1152. if( microsPerTickPtr != NULL )
  1153. *microsPerTickPtr = round(microsPerTick);
  1154. return mi;
  1155. }
  1156. double cmMidiFileDurSecs( cmMidiFileH_t h )
  1157. {
  1158. _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  1159. if( mfp->msgN == 0 )
  1160. return 0;
  1161. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(mfp);
  1162. return msgV[ mfp->msgN-1 ]->amicro / 1000000.0;
  1163. }
  1164. typedef struct _cmMidiVoice_str
  1165. {
  1166. const cmMidiTrackMsg_t* mp;
  1167. unsigned durMicros;
  1168. bool sustainFl;
  1169. struct _cmMidiVoice_str* link;
  1170. } _cmMidiVoice_t;
  1171. void _cmMidiFileSetDur( cmMidiTrackMsg_t* m0, cmMidiTrackMsg_t* m1 )
  1172. {
  1173. // calculate the duration of the sounding note
  1174. ((cmMidiChMsg_t*)m0->u.chMsgPtr)->durMicros = m1->amicro - m0->amicro;
  1175. // set the note-off msg pointer
  1176. ((cmMidiChMsg_t*)m0->u.chMsgPtr)->end = m1;
  1177. }
  1178. bool _cmMidiFileCalcNoteDur( cmMidiTrackMsg_t* m0, cmMidiTrackMsg_t* m1, int noteGateFl, int sustainGateFl, bool sostGateFl )
  1179. {
  1180. // if the note is being kept sounding because the key is still depressed,
  1181. // the sustain pedal is down or it is being held by the sostenuto pedal ....
  1182. if( noteGateFl>0 || sustainGateFl>0 || sostGateFl )
  1183. return false; // ... do nothing
  1184. _cmMidiFileSetDur(m0,m1);
  1185. return true;
  1186. }
  1187. void cmMidiFileCalcNoteDurations( cmMidiFileH_t h )
  1188. {
  1189. _cmMidiFile_t* p;
  1190. if((p = _cmMidiFileHandleToPtr(h)) == NULL )
  1191. return;
  1192. if( p->msgN == 0 )
  1193. return;
  1194. unsigned mi = cmInvalidId;
  1195. cmMidiTrackMsg_t* noteM[ kMidiNoteCnt * kMidiChCnt ]; // ptr to note-on or NULL if the note is not sounding
  1196. cmMidiTrackMsg_t* sustV[ kMidiChCnt ];
  1197. cmMidiTrackMsg_t* sostV[ kMidiChCnt ];
  1198. int noteGateM[ kMidiNoteCnt * kMidiChCnt ]; // true if the associated note key is depressed
  1199. bool sostGateM[ kMidiNoteCnt * kMidiChCnt ]; // true if the associated note was active when the sost. pedal went down
  1200. int sustGateV[ kMidiChCnt]; // true if the associated sustain pedal is down
  1201. int sostGateV[ kMidiChCnt]; // true if the associated sostenuto pedal is down
  1202. unsigned i,j;
  1203. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1204. // initialize the state tracking variables
  1205. for(i=0; i<kMidiChCnt; ++i)
  1206. {
  1207. sustV[i] = NULL;
  1208. sustGateV[i] = 0;
  1209. sostV[i] = NULL;
  1210. sostGateV[i] = 0;
  1211. for(j=0; j<kMidiNoteCnt; ++j)
  1212. {
  1213. noteM[ i*kMidiNoteCnt + j ] = NULL;
  1214. noteGateM[ i*kMidiNoteCnt + j ] = 0;
  1215. sostGateM[ i*kMidiNoteCnt + j ] = false;
  1216. }
  1217. }
  1218. // for each midi event
  1219. for(mi=0; mi<p->msgN; ++mi)
  1220. {
  1221. cmMidiTrackMsg_t* m = (cmMidiTrackMsg_t*)msgV[mi]; // cast away const
  1222. // verify that time is also incrementing
  1223. assert( mi==0 || (mi>0 && m->amicro >= msgV[mi-1]->amicro) );
  1224. // ignore all non-channel messages
  1225. if( !cmMidiIsChStatus( m->status ) )
  1226. continue;
  1227. cmMidiByte_t ch = m->u.chMsgPtr->ch; // get the midi msg channel
  1228. cmMidiByte_t d0 = m->u.chMsgPtr->d0; // get the midi msg data value
  1229. // if this is a note-on msg
  1230. if( cmMidiFileIsNoteOn(m) )
  1231. {
  1232. unsigned k = ch*kMidiNoteCnt + d0;
  1233. // there should be no existing sounding note instance for this pitch
  1234. //if( noteGateM[k] == 0 && noteM[k] != NULL )
  1235. // cmErrWarnMsg(&p->err,kMissingNoteOffMfRC,"%i : Missing note-off instance for note on:%s",m->uid,cmMidiToSciPitch(d0,NULL,0));
  1236. if( noteM[k] != NULL )
  1237. noteGateM[k] += 1;
  1238. else
  1239. {
  1240. noteM[k] = m;
  1241. noteGateM[k] = 1;
  1242. }
  1243. }
  1244. else
  1245. // if this is a note-off msg
  1246. if( cmMidiFileIsNoteOff(m) )
  1247. {
  1248. unsigned k = ch*kMidiNoteCnt + d0;
  1249. cmMidiTrackMsg_t* m0 = noteM[k];
  1250. if( m0 == NULL )
  1251. cmErrWarnMsg(&p->err,kMissingNoteOffMfRC,"%i : Missing note-on instance for note-off:%s",m->uid,cmMidiToSciPitch(d0,NULL,0));
  1252. else
  1253. {
  1254. // a key was released - so it should not already be up
  1255. if( noteGateM[k]==0 )
  1256. cmErrWarnMsg(&p->err,kMissingNoteOffMfRC,"%i : Missing note-on for note-off:%s",m->uid,cmMidiToSciPitch(d0,NULL,0));
  1257. else
  1258. {
  1259. noteGateM[k] -= 1; // update the note gate state
  1260. // update the sounding note status
  1261. if( _cmMidiFileCalcNoteDur(m0, m, noteGateM[k], sustGateV[ch], sostGateM[k]) )
  1262. noteM[k] = NULL;
  1263. }
  1264. }
  1265. }
  1266. else
  1267. // This is a sustain-pedal down msg
  1268. if( cmMidiFileIsSustainPedalDown(m) )
  1269. {
  1270. // if the sustain channel is already down
  1271. //if( sustGateV[ch] )
  1272. // cmErrWarnMsg(&p->err,kSustainPedalMfRC,"%i : The sustain pedal went down twice with no intervening release.",m->uid);
  1273. sustGateV[ch] += 1;
  1274. if( sustV[ch] == NULL )
  1275. sustV[ch] = m;
  1276. }
  1277. else
  1278. // This is a sustain-pedal up msg
  1279. if( cmMidiFileIsSustainPedalUp(m) )
  1280. {
  1281. // if the sustain channel is already up
  1282. if( sustGateV[ch]==0 )
  1283. cmErrWarnMsg(&p->err,kSustainPedalMfRC,"%i : The sustain pedal release message was received with no previous pedal down.",m->uid);
  1284. if( sustGateV[ch] >= 1 )
  1285. {
  1286. sustGateV[ch] -= 1;
  1287. if( sustGateV[ch] == 0 )
  1288. {
  1289. unsigned k = ch*kMidiNoteCnt;
  1290. // for each sounding note on this channel
  1291. for(; k<ch*kMidiNoteCnt+kMidiNoteCnt; ++k)
  1292. if( noteM[k]!=NULL && _cmMidiFileCalcNoteDur(noteM[k], m, noteGateM[k], sustGateV[ch], sostGateM[k]) )
  1293. noteM[k] = NULL;
  1294. if( sustV[ch] != NULL )
  1295. {
  1296. _cmMidiFileSetDur(sustV[ch],m);
  1297. ((cmMidiChMsg_t*)sustV[ch]->u.chMsgPtr)->end = m; // set the pedal-up msg ptr. in the pedal-down msg.
  1298. sustV[ch] = NULL;
  1299. }
  1300. }
  1301. }
  1302. }
  1303. else
  1304. // This is a sostenuto pedal-down msg
  1305. if( cmMidiFileIsSostenutoPedalDown(m) )
  1306. {
  1307. // if the sustain channel is already down
  1308. //if( sostGateV[ch] )
  1309. // cmErrWarnMsg(&p->err,kSostenutoPedalMfRC,"%i : The sostenuto pedal went down twice with no intervening release.",m->uid);
  1310. // record the notes that are active when the sostenuto pedal went down
  1311. unsigned k = ch * kMidiNoteCnt;
  1312. for(i=0; i<kMidiNoteCnt; ++i)
  1313. sostGateM[k+i] = noteGateM[k+i] > 0;
  1314. sostGateV[ch] += 1;
  1315. }
  1316. else
  1317. // This is a sostenuto pedal-up msg
  1318. if( cmMidiFileIsSostenutoPedalUp(m) )
  1319. {
  1320. // if the sustain channel is already up
  1321. if( sostGateV[ch]==0 )
  1322. cmErrWarnMsg(&p->err,kSostenutoPedalMfRC,"%i : The sostenuto pedal release message was received with no previous pedal down.",m->uid);
  1323. if( sostGateV[ch] >= 1 )
  1324. {
  1325. sostGateV[ch] -= 1;
  1326. if( sostGateV[ch] == 0 )
  1327. {
  1328. unsigned k = ch*kMidiNoteCnt;
  1329. // for each note on this channel
  1330. for(; k<ch*kMidiNoteCnt+kMidiNoteCnt; ++k)
  1331. {
  1332. sostGateM[k] = false;
  1333. if( noteM[k]!=NULL && _cmMidiFileCalcNoteDur(noteM[k], m, noteGateM[k], sustGateV[ch], sostGateM[k]) )
  1334. noteM[k] = NULL;
  1335. }
  1336. if( sostV[ch] != NULL )
  1337. {
  1338. _cmMidiFileSetDur(sostV[ch],m);
  1339. ((cmMidiChMsg_t*)sostV[ch]->u.chMsgPtr)->end = m; // set the pedal-up msg ptr. in the pedal-down msg.
  1340. sostV[ch] = NULL;
  1341. }
  1342. }
  1343. }
  1344. }
  1345. } // for each midi file event
  1346. }
  1347. void cmMidiFileSetDelay( cmMidiFileH_t h, unsigned ticks )
  1348. {
  1349. _cmMidiFile_t* p;
  1350. unsigned mi;
  1351. if((p = _cmMidiFileHandleToPtr(h)) == NULL )
  1352. return;
  1353. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1354. if( p->msgN == 0 )
  1355. return;
  1356. for(mi=0; mi<p->msgN; ++mi)
  1357. {
  1358. cmMidiTrackMsg_t* mp = (cmMidiTrackMsg_t*)msgV[mi]; // cast away const
  1359. // locate the first msg which has a non-zero delta tick
  1360. if( mp->dtick > 0 )
  1361. {
  1362. mp->dtick = ticks;
  1363. break;
  1364. }
  1365. }
  1366. }
  1367. unsigned cmMidiFilePackTrackMsgBufByteCount( const cmMidiTrackMsg_t* m )
  1368. { return sizeof(cmMidiTrackMsg_t) + m->byteCnt; }
  1369. cmMidiTrackMsg_t* cmMidiFilePackTrackMsg( const cmMidiTrackMsg_t* m, void* buf, unsigned bufByteCnt )
  1370. {
  1371. unsigned n = sizeof(cmMidiTrackMsg_t) + m->byteCnt;
  1372. if( n < bufByteCnt )
  1373. {
  1374. assert(0);
  1375. return NULL;
  1376. }
  1377. // copy the cmMidiTrackMsg_t into the buffer
  1378. memcpy(buf, m, sizeof(cmMidiTrackMsg_t));
  1379. if( m->byteCnt > 0 )
  1380. {
  1381. // copy any linked data into the buffer
  1382. memcpy(buf + sizeof(cmMidiTrackMsg_t), m->u.voidPtr, m->byteCnt );
  1383. // fixup the linked data ptr
  1384. cmMidiTrackMsg_t* mp = (cmMidiTrackMsg_t*)buf;
  1385. mp->u.voidPtr = buf + sizeof(cmMidiTrackMsg_t);
  1386. }
  1387. return (cmMidiTrackMsg_t*)buf;
  1388. }
  1389. void _cmMidiFilePrintHdr( const _cmMidiFile_t* mfp, cmRpt_t* rpt )
  1390. {
  1391. if( mfp->fn != NULL )
  1392. cmRptPrintf(rpt,"%s ",mfp->fn);
  1393. cmRptPrintf(rpt,"fmt:%i ticksPerQN:%i tracks:%i\n",mfp->fmtId,mfp->ticksPerQN,mfp->trkN);
  1394. cmRptPrintf(rpt," UID dtick atick amicro type ch D0 D1\n");
  1395. cmRptPrintf(rpt,"----- ---------- ---------- ---------- : ---- --- --- ---\n");
  1396. }
  1397. void _cmMidiFilePrintMsg( cmRpt_t* rpt, const cmMidiTrackMsg_t* tmp )
  1398. {
  1399. cmRptPrintf(rpt,"%5i %10u %10llu %10llu : ",
  1400. tmp->uid,
  1401. tmp->dtick,
  1402. tmp->atick,
  1403. tmp->amicro );
  1404. if( tmp->status == kMetaStId )
  1405. {
  1406. cmRptPrintf(rpt,"%s ", cmMidiMetaStatusToLabel(tmp->metaId));
  1407. }
  1408. else
  1409. {
  1410. cmRptPrintf(rpt,"%4s %3i %3i %3i",
  1411. cmMidiStatusToLabel(tmp->status),
  1412. tmp->u.chMsgPtr->ch,
  1413. tmp->u.chMsgPtr->d0,
  1414. tmp->u.chMsgPtr->d1);
  1415. }
  1416. if( cmMidiIsChStatus(tmp->status) && cmMidiIsNoteOn(tmp->status) && (tmp->u.chMsgPtr->d1>0) )
  1417. cmRptPrintf(rpt," %4s ",cmMidiToSciPitch(tmp->u.chMsgPtr->d0,NULL,0));
  1418. cmRptPrintf(rpt,"\n");
  1419. }
  1420. void cmMidiFilePrintMsgs( cmMidiFileH_t h, cmRpt_t* rpt )
  1421. {
  1422. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(h);
  1423. unsigned mi;
  1424. _cmMidiFilePrintHdr(p,rpt);
  1425. const cmMidiTrackMsg_t** msgV = _cmMidiFileMsgArray(p);
  1426. for(mi=0; mi<p->msgN; ++mi)
  1427. {
  1428. const cmMidiTrackMsg_t* mp = msgV[mi];
  1429. if( mp != NULL )
  1430. _cmMidiFilePrintMsg(rpt,mp);
  1431. }
  1432. }
  1433. void cmMidiFilePrintTracks( cmMidiFileH_t h, unsigned trkIdx, cmRpt_t* rpt )
  1434. {
  1435. const _cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
  1436. _cmMidiFilePrintHdr(mfp,rpt);
  1437. int i = trkIdx == cmInvalidIdx ? 0 : trkIdx;
  1438. int n = trkIdx == cmInvalidIdx ? mfp->trkN : trkIdx+1;
  1439. for(; i<n; ++i)
  1440. {
  1441. cmRptPrintf(rpt,"Track:%i\n",i);
  1442. cmMidiTrackMsg_t* tmp = mfp->trkV[i].base;
  1443. while( tmp != NULL )
  1444. {
  1445. _cmMidiFilePrintMsg(rpt,tmp);
  1446. tmp = tmp->link;
  1447. }
  1448. }
  1449. }
  1450. void cmMidiFileTestPrint( void* printDataPtr, const char* fmt, va_list vl )
  1451. { vprintf(fmt,vl); }
  1452. cmMfRC_t cmMidiFileGenPlotFile( cmCtx_t* ctx, const cmChar_t* midiFn, const cmChar_t* outFn )
  1453. {
  1454. cmMfRC_t rc = kOkMfRC;
  1455. cmMidiFileH_t mfH = cmMidiFileNullHandle;
  1456. cmFileH_t fH = cmFileNullHandle;
  1457. unsigned i = 0;
  1458. const cmMidiTrackMsg_t** m = NULL;
  1459. unsigned mN = 0;
  1460. if((rc = cmMidiFileOpen(ctx, &mfH, midiFn )) != kOkMfRC )
  1461. return cmErrMsg(&ctx->err,rc,"The MIDI file object could not be opened from '%s'.",cmStringNullGuard(midiFn));
  1462. _cmMidiFile_t* p = _cmMidiFileHandleToPtr(mfH);
  1463. if( (m = cmMidiFileMsgArray(mfH)) == NULL || (mN = cmMidiFileMsgCount(mfH)) == 0 )
  1464. {
  1465. rc = cmErrMsg(&p->err,kFileFailMfRC,"The MIDI file object appears to be empty.");
  1466. goto errLabel;
  1467. }
  1468. cmMidiFileCalcNoteDurations( mfH );
  1469. if( cmFileOpen(&fH,outFn,kWriteFileFl,p->err.rpt) != kOkFileRC )
  1470. return cmErrMsg(&p->err,kFileFailMfRC,"Unable to create the file '%s'.",cmStringNullGuard(outFn));
  1471. for(i=0; i<mN; ++i)
  1472. if( (m[i]!=NULL) && cmMidiIsChStatus(m[i]->status) && cmMidiIsNoteOn(m[i]->status) && (m[i]->u.chMsgPtr->d1>0) )
  1473. 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));
  1474. errLabel:
  1475. cmMidiFileClose(&mfH);
  1476. cmFileClose(&fH);
  1477. return rc;
  1478. }
  1479. void cmMidiFilePrintControlNumbers( cmCtx_t* ctx, const char* fn )
  1480. {
  1481. cmMidiFileH_t h = cmMidiFileNullHandle;
  1482. cmMfRC_t rc;
  1483. if((rc = cmMidiFileOpen(ctx, &h, fn )) != kOkMfRC )
  1484. {
  1485. cmErrMsg(&ctx->err,rc,"MIDI file open failed on '%s'.",fn);
  1486. goto errLabel;
  1487. }
  1488. const cmMidiTrackMsg_t** mm;
  1489. unsigned n = cmMidiFileMsgCount(h);
  1490. if((mm = cmMidiFileMsgArray(h)) != NULL )
  1491. {
  1492. unsigned j;
  1493. for(j=0; j<n; ++j)
  1494. {
  1495. const cmMidiTrackMsg_t* m = mm[j];
  1496. if( m->status == kCtlMdId && m->u.chMsgPtr->d0==66 )
  1497. printf("%i %i\n",m->u.chMsgPtr->d0,m->u.chMsgPtr->d1);
  1498. }
  1499. }
  1500. errLabel:
  1501. cmMidiFileClose(&h);
  1502. }
  1503. void cmMidiFileTest( const char* fn, cmCtx_t* ctx )
  1504. {
  1505. cmMfRC_t rc;
  1506. cmMidiFileH_t h = cmMidiFileNullHandle;
  1507. if((rc = cmMidiFileOpen(ctx,&h,fn)) != kOkMfRC )
  1508. {
  1509. printf("Error:%i Unable to open the cmMidi file: %s\n",rc,fn);
  1510. return;
  1511. }
  1512. cmMidiFileCalcNoteDurations( h );
  1513. if( 1 )
  1514. {
  1515. //cmMidiFileTickToMicros( h );
  1516. //cmMidiFileTickToSamples(h,96000,false);
  1517. cmMidiFilePrintMsgs(h,&ctx->rpt);
  1518. }
  1519. if( 0 )
  1520. {
  1521. //cmMidiFilePrint(h,cmMidiFileTrackCount(h)-1,&ctx->rpt);
  1522. //cmMidiFilePrint(h,cmInvalidIdx,&ctx->rpt);
  1523. cmMidiFilePrintControlNumbers(ctx, fn );
  1524. }
  1525. if( 0 )
  1526. {
  1527. printf("Tracks:%i\n",cmMidiFileTrackCount(h));
  1528. unsigned i = 0;
  1529. for(i=0; i<cmMidiFileMsgCount(h); ++i)
  1530. {
  1531. cmMidiTrackMsg_t* tmp = (cmMidiTrackMsg_t*)cmMidiFileMsgArray(h)[i];
  1532. if( tmp->status==kMetaStId && tmp->metaId == kTempoMdId )
  1533. {
  1534. double bpm = 60000000.0/tmp->u.iVal;
  1535. printf("Tempo:%i %f\n",tmp->u.iVal,bpm);
  1536. tmp->u.iVal = floor( 60000000.0/69.0 );
  1537. break;
  1538. }
  1539. }
  1540. cmMidiFileWrite(h,"/home/kevin/temp/test0.mid");
  1541. }
  1542. cmMidiFileClose(&h);
  1543. }