libcm is a C development framework with an emphasis on audio signal processing applications.
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  1. #include <sys/time.h> // gettimeofday()
  2. #include "cmPrefix.h"
  3. #include "cmGlobal.h"
  4. #include "cmRpt.h"
  5. #include "cmErr.h"
  6. #include "cmCtx.h"
  7. #include "cmMem.h"
  8. #include "cmMallocDebug.h"
  9. #include "cmFile.h"
  10. #include "cmMidi.h"
  11. #include "cmMidiPort.h"
  12. #include "cmMidiFile.h"
  13. #include "cmMidiFilePlay.h"
  14. #include "cmThread.h" // cmSleepUs()
  15. #include "cmTime.h"
  16. typedef struct
  17. {
  18. cmErr_t err;
  19. cmCtx_t ctx;
  20. cmMfpCallback_t cbFunc;
  21. void* userCbPtr;
  22. void* printDataPtr;
  23. unsigned memBlockByteCnt;
  24. cmMidiFileH_t mfH; // midi file handle
  25. bool closeFileFl; // true mfH should be closed when this midi file player is closed
  26. unsigned ticksPerQN; // global for file
  27. unsigned microsPerTick; // set via tempo
  28. unsigned etime; // usecs elapsed since transmitting prev msg
  29. unsigned mtime; // usecs to wait before transmitting next msg
  30. unsigned msgN; // count of pointers in msgV[]
  31. unsigned msgIdx; // index into msgV[] of next msg to transmit
  32. const cmMidiTrackMsg_t** msgV; // array of msg pointers
  33. } cmMfp_t;
  34. cmMfpH_t cmMfpNullHandle = cmSTATIC_NULL_HANDLE;
  35. #define _cmMfpError( mfp, rc ) _cmMfpOnError(mfp, rc, __LINE__,__FILE__,__FUNCTION__ )
  36. // note: mfp may be NULL
  37. cmMfpRC_t _cmMfpOnError( cmMfp_t* mfp, cmMfpRC_t rc, int line, const char* fn, const char* func )
  38. {
  39. return cmErrMsg(&mfp->err,rc,"rc:%i %i %s %s\n",rc,line,func,fn);
  40. }
  41. cmMfp_t* _cmMfpHandleToPtr( cmMfpH_t h )
  42. {
  43. cmMfp_t* p = (cmMfp_t*)h.h;
  44. assert(p != NULL);
  45. return p;
  46. }
  47. void _cmMfpUpdateMicrosPerTick( cmMfp_t* mfp, unsigned microsPerQN )
  48. {
  49. mfp->microsPerTick = microsPerQN / mfp->ticksPerQN;
  50. printf("microsPerTick: %i bpm:%i ticksPerQN:%i\n", mfp->microsPerTick,microsPerQN,mfp->ticksPerQN);
  51. }
  52. cmMfpRC_t cmMfpCreate( cmMfpH_t* hp, cmMfpCallback_t cbFunc, void* userCbPtr, cmCtx_t* ctx )
  53. {
  54. cmMfp_t* p = cmMemAllocZ( cmMfp_t, 1 );
  55. cmErrSetup(&p->err,&ctx->rpt,"MIDI File Player");
  56. p->ctx = *ctx;
  57. p->cbFunc = cbFunc;
  58. p->userCbPtr = userCbPtr;
  59. p->mfH.h = NULL;
  60. p->closeFileFl = false;
  61. p->ticksPerQN = 0;
  62. p->microsPerTick = 0;
  63. p->etime = 0;
  64. p->msgN = 0;
  65. p->msgV = NULL;
  66. p->msgIdx = 0;
  67. hp->h = p;
  68. return kOkMfpRC;
  69. }
  70. cmMfpRC_t cmMfpDestroy( cmMfpH_t* hp )
  71. {
  72. if( hp == NULL )
  73. return kOkMfpRC;
  74. if( cmMfpIsValid(*hp) )
  75. {
  76. cmMfp_t* p = _cmMfpHandleToPtr(*hp);
  77. if( cmMidiFileIsNull(p->mfH)==false && p->closeFileFl==true )
  78. cmMidiFileClose(&p->mfH);
  79. cmMemFree(p);
  80. hp->h = NULL;
  81. }
  82. return kOkMfpRC;
  83. }
  84. bool cmMfpIsValid( cmMfpH_t h )
  85. { return h.h != NULL; }
  86. cmMfpRC_t cmMfpLoadFile( cmMfpH_t h, const char* fn )
  87. {
  88. cmMfpRC_t rc = kOkMfpRC;
  89. cmMfp_t* p = _cmMfpHandleToPtr(h);
  90. cmMidiFileH_t mfH = cmMidiFileNullHandle;
  91. if((rc = cmMidiFileOpen( fn, &mfH, &p->ctx )) != kOkMfRC )
  92. return _cmMfpError(p,kFileOpenFailMfpRC);
  93. if((rc= cmMfpLoadHandle( h, mfH )) == kOkMfpRC )
  94. p->closeFileFl = true;
  95. return rc;
  96. }
  97. cmMfpRC_t cmMfpLoadHandle( cmMfpH_t h, cmMidiFileH_t mfH )
  98. {
  99. cmMfp_t* p = _cmMfpHandleToPtr(h);
  100. // if a file has already been assigned to this player
  101. if( (cmMidiFileIsNull(p->mfH) == false) && p->closeFileFl)
  102. {
  103. // close the existing file
  104. cmMidiFileClose(&p->mfH);
  105. }
  106. // get the count of msg's in the new midi file
  107. if((p->msgN = cmMidiFileMsgCount(mfH)) == cmInvalidCnt )
  108. return _cmMfpError(p,kInvalidFileMfpRC);
  109. // get a pointer to the first mesage
  110. if((p->msgV = cmMidiFileMsgArray(mfH)) == NULL )
  111. return _cmMfpError(p,kInvalidFileMfpRC);
  112. // get the count of ticks per qn
  113. if((p->ticksPerQN = cmMidiFileTicksPerQN( mfH )) == 0 )
  114. return _cmMfpError(p,kSmpteTickNotImplMfpRC);
  115. // set the initial tempo to 120
  116. _cmMfpUpdateMicrosPerTick(p,60000000/120);
  117. p->msgIdx = 0;
  118. p->mfH = mfH;
  119. p->etime = 0;
  120. p->mtime = 0;
  121. p->closeFileFl= false;
  122. //if( p->msgIdx > 0 )
  123. // p->mtime = p->msgV[0]->tick * p->microsPerTick;
  124. return kOkMfpRC;
  125. }
  126. cmMfpRC_t cmMfpSeek( cmMfpH_t h, unsigned offsUsecs )
  127. {
  128. cmMfp_t* p = _cmMfpHandleToPtr(h);
  129. unsigned msgOffsUsecs = 0;
  130. unsigned msgIdx;
  131. unsigned newMicrosPerTick;
  132. // if the requested offset is past the end of the file then return EOF
  133. if((msgIdx = cmMidiFileSeekUsecs( p->mfH, offsUsecs, &msgOffsUsecs, &newMicrosPerTick )) == cmInvalidIdx )
  134. {
  135. p->msgIdx = p->msgN;
  136. return _cmMfpError(p,kEndOfFileMfpRC);
  137. }
  138. if( msgIdx < p->msgIdx )
  139. p->msgIdx = 0;
  140. p->mtime = msgOffsUsecs;
  141. p->etime = 0;
  142. p->microsPerTick = newMicrosPerTick;
  143. p->msgIdx = msgIdx;
  144. assert(p->mtime >= 0);
  145. return kOkMfpRC;
  146. }
  147. // p 0 1 n 2
  148. // v v v v v
  149. // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  150. // 012345678901234567890123456780
  151. // 0 1 2
  152. //
  153. // p = 3 = prev msg sent
  154. // n = 19 = next msg to send
  155. // 0 = 6 = call to cmMfpClock()
  156. // 1 = 12 = call to cmMfpClock()
  157. // 2 = 22 = call to cmMfpClock()
  158. //
  159. // dusecs etime mtime
  160. // 0 n/a 3 13
  161. // 1 6 9 7
  162. // 2 10 19 -3
  163. //
  164. cmMfpRC_t cmMfpClock( cmMfpH_t h, unsigned dusecs )
  165. {
  166. cmMfp_t* p = _cmMfpHandleToPtr(h);
  167. if( p->msgIdx >= p->msgN )
  168. return kEndOfFileMfpRC;
  169. // get a pointer to the next msg to send
  170. const cmMidiTrackMsg_t* mp = p->msgV[p->msgIdx];
  171. // p->etime is the interval of time between when the last msg was
  172. // sent and the end of the time window for this mfpClock() cycle
  173. p->etime += dusecs;
  174. //printf("init e:%i d:%i\n",p->etime, p->mtime);
  175. // if the elapsed time (etime) since the last msg is greater or equal
  176. // to the delta time to the next msg (mtime)
  177. while( p->etime >= p->mtime )
  178. {
  179. //printf("e:%i d:%i\n",p->etime, p->mtime);
  180. if( mp->status == kMetaStId && mp->metaId == kTempoMdId )
  181. _cmMfpUpdateMicrosPerTick(p,mp->u.iVal );
  182. p->cbFunc( p->userCbPtr, p->mtime, mp );
  183. ++(p->msgIdx);
  184. if( p->msgIdx >= p->msgN )
  185. break;
  186. // get the next msg to send
  187. mp = p->msgV[p->msgIdx];
  188. // we probably went past the actual mtime - so update etime
  189. // with the delta usecs from the msg just sent and the current time
  190. p->etime -= p->mtime;
  191. // calc the delta usecs from the message just sent to the next msg to send
  192. //p->mtime = (mp->tick - p->msgV[p->msgIdx-1]->tick) * p->microsPerTick;
  193. p->mtime = mp->dtick * p->microsPerTick;
  194. }
  195. return p->msgIdx >= p->msgN ? kEndOfFileMfpRC : kOkMfpRC;
  196. }
  197. void mfpPrint( void* userDataPtr, const char* fmt, va_list vl )
  198. {
  199. vprintf(fmt,vl);
  200. }
  201. // this assumes that the seconds have been normalized to a recent start time
  202. // so as to avoid overflow
  203. unsigned _cmMfpElapsedMicroSecs( const struct timespec* t0, const struct timespec* t1 )
  204. {
  205. // convert seconds to usecs
  206. long u0 = t0->tv_sec * 1000000;
  207. long u1 = t1->tv_sec * 1000000;
  208. // convert nanoseconds to usec
  209. u0 += t0->tv_nsec / 1000;
  210. u1 += t1->tv_nsec / 1000;
  211. // take diff between t1 and t0
  212. return u1 - u0;
  213. }
  214. void _cmMfpTestTimer()
  215. {
  216. useconds_t suspendUsecs = 15 * 1000;
  217. struct timespec t0,t1,t2;
  218. unsigned accum = 0;
  219. unsigned i;
  220. unsigned n = 4000;
  221. // t0 will be the base time which all other times will be
  222. // set relative to.
  223. cmTimeGet(&t0);
  224. t2 = t0;
  225. t2.tv_sec = 0;
  226. for(i=0; i<n; ++i)
  227. {
  228. cmSleepUs(suspendUsecs);
  229. cmTimeGet(&t1);
  230. t1.tv_sec -= t0.tv_sec;
  231. unsigned d0usec = _cmMfpElapsedMicroSecs(&t0,&t1);
  232. unsigned d1usec = _cmMfpElapsedMicroSecs(&t2,&t1);
  233. accum += d1usec;
  234. if( i == n-1 )
  235. printf("%i %i %i\n",d0usec,d1usec,accum);
  236. t2 = t1;
  237. }
  238. }
  239. // midi file player callback test function
  240. void _cmMfpCallbackTest( void* userCbPtr, unsigned dmicros, const cmMidiTrackMsg_t* msgPtr )
  241. {
  242. if( kNoteOffMdId <= msgPtr->status && msgPtr->status <= kPbendMdId )
  243. cmMpDeviceSend( 0, 0, msgPtr->status+msgPtr->u.chMsgPtr->ch, msgPtr->u.chMsgPtr->d0,msgPtr->u.chMsgPtr->d1);
  244. //printf("%i 0x%x 0x%x %i\n",msgPtr->tick,msgPtr->status,msgPtr->metaId,msgPtr->trkIdx);
  245. }
  246. // midi port callback test function
  247. void _cmMpCallbackTest( const cmMidiPacket_t* pktArray, unsigned pktCnt )
  248. {}
  249. cmMfpRC_t cmMfpTest( const char* fn, cmCtx_t* ctx )
  250. {
  251. cmMfpH_t mfpH = cmMfpNullHandle;
  252. cmMfpRC_t rc;
  253. useconds_t suspendUsecs = 15 * 1000;
  254. struct timespec t0,t1,base;
  255. //unsigned i;
  256. //unsigned n = 4000;
  257. unsigned mdParserBufByteCnt = 1024;
  258. printf("Initializing MIDI Devices...\n");
  259. cmMpInitialize( ctx, _cmMpCallbackTest, NULL, mdParserBufByteCnt,"app" );
  260. //mdReport();
  261. printf("Creating Player...\n");
  262. if((rc = cmMfpCreate( &mfpH, _cmMfpCallbackTest, NULL, ctx )) != kOkMfpRC )
  263. return rc;
  264. printf("Loading MIDI file...\n");
  265. if((rc = cmMfpLoadFile( mfpH, fn )) != kOkMfpRC )
  266. goto errLabel;
  267. if((rc = cmMfpSeek( mfpH, 60 * 1000000 )) != kOkMfpRC )
  268. goto errLabel;
  269. cmTimeGet(&base);
  270. t0 = base;
  271. t0.tv_sec = 0;
  272. //for(i=0; i<n; ++i)
  273. while(rc != kEndOfFileMfpRC)
  274. {
  275. cmSleepUs(suspendUsecs);
  276. cmTimeGet(&t1);
  277. t1.tv_sec -= base.tv_sec;
  278. unsigned dusecs = _cmMfpElapsedMicroSecs(&t0,&t1);
  279. rc = cmMfpClock( mfpH, dusecs );
  280. //printf("%i %i\n",dusecs,rc);
  281. t0 = t1;
  282. }
  283. errLabel:
  284. cmMfpDestroy(&mfpH);
  285. cmMpFinalize();
  286. return rc;
  287. }
  288. //------------------------------------------------------------------------------------------------------------
  289. #include "cmFloatTypes.h"
  290. #include "cmComplexTypes.h"
  291. #include "cmLinkedHeap.h"
  292. #include "cmSymTbl.h"
  293. #include "cmAudioFile.h"
  294. #include "cmProcObj.h"
  295. #include "cmProcTemplateMain.h"
  296. #include "cmVectOps.h"
  297. #include "cmProc.h"
  298. #include "cmProc2.h"
  299. enum
  300. {
  301. kOkMfptRC = cmOkRC,
  302. kMfpFailMfptRC,
  303. kAudioFileFailMfptRC,
  304. kProcObjFailMfptRC
  305. };
  306. typedef struct
  307. {
  308. cmErr_t* err;
  309. cmMidiSynth* msp;
  310. } _cmMfpTest2CbData_t;
  311. // Called by the MIDI file player to send a msg to the MIDI synth.
  312. void _cmMfpCb( void* userCbPtr, unsigned dmicros, const cmMidiTrackMsg_t* msgPtr )
  313. {
  314. if( kNoteOffMdId <= msgPtr->status && msgPtr->status <= kPbendMdId )
  315. {
  316. cmMidiPacket_t pkt;
  317. cmMidiMsg msg;
  318. _cmMfpTest2CbData_t* d = (_cmMfpTest2CbData_t*)userCbPtr;
  319. msg.deltaUs = dmicros;
  320. msg.status = msgPtr->status + msgPtr->u.chMsgPtr->ch;
  321. msg.d0 = msgPtr->u.chMsgPtr->d0;
  322. msg.d1 = msgPtr->u.chMsgPtr->d1;
  323. pkt.cbDataPtr = NULL;
  324. pkt.devIdx = cmInvalidIdx;
  325. pkt.portIdx = cmInvalidIdx;
  326. pkt.msgArray = &msg;
  327. pkt.sysExMsg = NULL;
  328. pkt.msgCnt = 1;
  329. if( cmMidiSynthOnMidi( d->msp, &pkt, 1 ) != cmOkRC )
  330. cmErrMsg(d->err,kProcObjFailMfptRC,"Synth. MIDI receive failed.");
  331. }
  332. }
  333. // Called by the MIDI synth to send a msg to the voice bank.
  334. int _cmMidiSynthCb( struct cmMidiVoice_str* voicePtr, unsigned sel, cmSample_t* outChArray[], unsigned outChCnt )
  335. {
  336. return cmWtVoiceBankExec( ((cmWtVoiceBank*)voicePtr->pgm.cbDataPtr), voicePtr, sel, outChArray, outChCnt );
  337. }
  338. // BUG BUG BUG: THIS FUNCTION IS NOT TESTED!!!!!
  339. cmRC_t cmMfpTest2( const char* midiFn, const char* audioFn, cmCtx_t* ctx )
  340. {
  341. cmRC_t rc = kOkMfptRC;
  342. cmMfpH_t mfpH = cmMfpNullHandle;
  343. _cmMfpTest2CbData_t cbData;
  344. cmErr_t err;
  345. cmAudioFileH_t afH = cmNullAudioFileH;
  346. cmRC_t afRC = kOkAfRC;
  347. double afSrate = 44100;
  348. unsigned afBits = 16;
  349. unsigned afChCnt = 1;
  350. cmCtx* cctx;
  351. cmMidiSynth* msp;
  352. cmWtVoiceBank* vbp;
  353. unsigned msPgmCnt = 127;
  354. cmMidiSynthPgm msPgmArray[ msPgmCnt ];
  355. unsigned msVoiceCnt = 36;
  356. unsigned procSmpCnt = 64;
  357. unsigned i;
  358. cmErrSetup(&err,&ctx->rpt,"MFP Test 2");
  359. // create the MIDI file player
  360. if( cmMfpCreate(&mfpH, _cmMfpCb, &cbData, ctx ) != kOkMfpRC )
  361. return cmErrMsg(&err,kMfpFailMfptRC,"MIDI file player create failed.");
  362. // create an output audio file
  363. if( cmAudioFileIsValid( afH = cmAudioFileNewCreate(audioFn, afSrate, afBits, afChCnt, &afRC, &ctx->rpt))==false)
  364. {
  365. rc = cmErrMsg(&err,kAudioFileFailMfptRC,"The audio file create failed.");
  366. goto errLabel;
  367. }
  368. // load the midi file into the player
  369. if( cmMfpLoadFile( mfpH, midiFn ) != kOkMfpRC )
  370. {
  371. rc = cmErrMsg(&err,kMfpFailMfptRC,"MIDI file load failed.");
  372. goto errLabel;
  373. }
  374. // create the proc obj context
  375. if((cctx = cmCtxAlloc(NULL, &ctx->rpt, cmLHeapNullHandle, cmSymTblNullHandle )) == NULL)
  376. {
  377. rc = cmErrMsg(&err,kProcObjFailMfptRC,"cmCtx allocate failed.");
  378. goto errLabel;
  379. }
  380. // create the voice bank
  381. if((vbp = cmWtVoiceBankAlloc(cctx, NULL, afSrate, procSmpCnt, msVoiceCnt, afChCnt )) == NULL)
  382. {
  383. rc = cmErrMsg(&err,kProcObjFailMfptRC,"WT voice bank allocate failed.");
  384. goto errLabel;
  385. }
  386. // a MIDI synth
  387. if((msp = cmMidiSynthAlloc(cctx, NULL, msPgmArray, msPgmCnt, msVoiceCnt, procSmpCnt, afChCnt, afSrate )) == NULL )
  388. {
  389. rc = cmErrMsg(&err,kProcObjFailMfptRC,"MIDI synth allocate failed.");
  390. goto errLabel;
  391. }
  392. cbData.msp = msp;
  393. cbData.err = &err;
  394. // load all of the the MIDI pgm recds with the same settings
  395. for(i=0; i<msPgmCnt; ++i)
  396. {
  397. msPgmArray[i].pgm = i;
  398. msPgmArray[i].cbPtr = _cmMidiSynthCb; // Call this function to update voices using this pgm
  399. msPgmArray[i].cbDataPtr = vbp; // Voice bank containing the voice states.
  400. }
  401. unsigned dusecs = floor((double)procSmpCnt * 1000000. / afSrate);
  402. while(rc != kEndOfFileMfpRC)
  403. {
  404. // update the MFP's current time and call _cmMfpCb() for MIDI msgs whose time has elapsed
  405. rc = cmMfpClock( mfpH, dusecs );
  406. // check for MFP errors
  407. if(rc!=kOkMfpRC && rc!=kEndOfFileMfpRC)
  408. {
  409. cmErrMsg(&err,kMfpFailMfptRC,"MIDI file player exec failed.");
  410. goto errLabel;
  411. }
  412. // generate audio based on the current state of the synth voices
  413. if( cmMidiSynthExec(msp, NULL, 0 ) != cmOkRC )
  414. {
  415. cmErrMsg(&err,kProcObjFailMfptRC,"MIDI synth exec. failed.");
  416. goto errLabel;
  417. }
  418. // write the last frame of synth. generated audio to the output file
  419. if( cmAudioFileWriteSample(afH, procSmpCnt, msp->outChCnt, msp->outChArray ) != kOkAfRC )
  420. {
  421. cmErrMsg(&err,kProcObjFailMfptRC,"Audio file write failed.");
  422. goto errLabel;
  423. }
  424. }
  425. errLabel:
  426. if( cmMidiSynthFree(&msp) != cmOkRC )
  427. cmErrMsg(&err,kProcObjFailMfptRC,"MIDI synth. free failed.");
  428. if( cmWtVoiceBankFree(&vbp) != cmOkRC )
  429. cmErrMsg(&err,kProcObjFailMfptRC,"WT voice free failed.");
  430. if( cmCtxFree(&cctx) != cmOkRC )
  431. cmErrMsg(&err,kProcObjFailMfptRC,"cmCtx free failed.");
  432. if( cmAudioFileDelete(&afH) )
  433. cmErrMsg(&err,kAudioFileFailMfptRC,"The audio file close failed.");
  434. if( cmMfpDestroy(&mfpH) != kOkMfpRC )
  435. cmErrMsg(&err,kMfpFailMfptRC,"MIDI file player destroy failed.");
  436. return rc;
  437. }