libcm is a C development framework with an emphasis on audio signal processing applications.
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cmMidiFilePlay.c 15KB

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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. #ifdef OS_OSX
  16. #include "osx/clock_gettime_stub.h"
  17. #endif
  18. #ifdef OS_LINUX
  19. #include <time.h> // clock_gettime()
  20. #endif
  21. typedef struct
  22. {
  23. cmErr_t err;
  24. cmCtx_t ctx;
  25. cmMfpCallback_t cbFunc;
  26. void* userCbPtr;
  27. void* printDataPtr;
  28. unsigned memBlockByteCnt;
  29. cmMidiFileH_t mfH; // midi file handle
  30. bool closeFileFl; // true mfH should be closed when this midi file player is closed
  31. unsigned ticksPerQN; // global for file
  32. unsigned microsPerTick; // set via tempo
  33. unsigned etime; // usecs elapsed since transmitting prev msg
  34. unsigned mtime; // usecs to wait before transmitting next msg
  35. unsigned msgN; // count of pointers in msgV[]
  36. unsigned msgIdx; // index into msgV[] of next msg to transmit
  37. const cmMidiTrackMsg_t** msgV; // array of msg pointers
  38. } cmMfp_t;
  39. cmMfpH_t cmMfpNullHandle = cmSTATIC_NULL_HANDLE;
  40. #define _cmMfpError( mfp, rc ) _cmMfpOnError(mfp, rc, __LINE__,__FILE__,__FUNCTION__ )
  41. // note: mfp may be NULL
  42. cmMfpRC_t _cmMfpOnError( cmMfp_t* mfp, cmMfpRC_t rc, int line, const char* fn, const char* func )
  43. {
  44. return cmErrMsg(&mfp->err,rc,"rc:%i %i %s %s\n",rc,line,func,fn);
  45. }
  46. cmMfp_t* _cmMfpHandleToPtr( cmMfpH_t h )
  47. {
  48. cmMfp_t* p = (cmMfp_t*)h.h;
  49. assert(p != NULL);
  50. return p;
  51. }
  52. void _cmMfpUpdateMicrosPerTick( cmMfp_t* mfp, unsigned microsPerQN )
  53. {
  54. mfp->microsPerTick = microsPerQN / mfp->ticksPerQN;
  55. printf("microsPerTick: %i bpm:%i ticksPerQN:%i\n", mfp->microsPerTick,microsPerQN,mfp->ticksPerQN);
  56. }
  57. cmMfpRC_t cmMfpCreate( cmMfpH_t* hp, cmMfpCallback_t cbFunc, void* userCbPtr, cmCtx_t* ctx )
  58. {
  59. cmMfp_t* p = cmMemAllocZ( cmMfp_t, 1 );
  60. cmErrSetup(&p->err,&ctx->rpt,"MIDI File Player");
  61. p->ctx = *ctx;
  62. p->cbFunc = cbFunc;
  63. p->userCbPtr = userCbPtr;
  64. p->mfH.h = NULL;
  65. p->closeFileFl = false;
  66. p->ticksPerQN = 0;
  67. p->microsPerTick = 0;
  68. p->etime = 0;
  69. p->msgN = 0;
  70. p->msgV = NULL;
  71. p->msgIdx = 0;
  72. hp->h = p;
  73. return kOkMfpRC;
  74. }
  75. cmMfpRC_t cmMfpDestroy( cmMfpH_t* hp )
  76. {
  77. if( hp == NULL )
  78. return kOkMfpRC;
  79. if( cmMfpIsValid(*hp) )
  80. {
  81. cmMfp_t* p = _cmMfpHandleToPtr(*hp);
  82. if( cmMidiFileIsNull(p->mfH)==false && p->closeFileFl==true )
  83. cmMidiFileClose(&p->mfH);
  84. cmMemFree(p);
  85. hp->h = NULL;
  86. }
  87. return kOkMfpRC;
  88. }
  89. bool cmMfpIsValid( cmMfpH_t h )
  90. { return h.h != NULL; }
  91. cmMfpRC_t cmMfpLoadFile( cmMfpH_t h, const char* fn )
  92. {
  93. cmMfpRC_t rc = kOkMfpRC;
  94. cmMfp_t* p = _cmMfpHandleToPtr(h);
  95. cmMidiFileH_t mfH = cmMidiFileNullHandle;
  96. if((rc = cmMidiFileOpen( fn, &mfH, &p->ctx )) != kOkMfRC )
  97. return _cmMfpError(p,kFileOpenFailMfpRC);
  98. if((rc= cmMfpLoadHandle( h, mfH )) == kOkMfpRC )
  99. p->closeFileFl = true;
  100. return rc;
  101. }
  102. cmMfpRC_t cmMfpLoadHandle( cmMfpH_t h, cmMidiFileH_t mfH )
  103. {
  104. cmMfp_t* p = _cmMfpHandleToPtr(h);
  105. // if a file has already been assigned to this player
  106. if( (cmMidiFileIsNull(p->mfH) == false) && p->closeFileFl)
  107. {
  108. // close the existing file
  109. cmMidiFileClose(&p->mfH);
  110. }
  111. // get the count of msg's in the new midi file
  112. if((p->msgN = cmMidiFileMsgCount(mfH)) == cmInvalidCnt )
  113. return _cmMfpError(p,kInvalidFileMfpRC);
  114. // get a pointer to the first mesage
  115. if((p->msgV = cmMidiFileMsgArray(mfH)) == NULL )
  116. return _cmMfpError(p,kInvalidFileMfpRC);
  117. // get the count of ticks per qn
  118. if((p->ticksPerQN = cmMidiFileTicksPerQN( mfH )) == 0 )
  119. return _cmMfpError(p,kSmpteTickNotImplMfpRC);
  120. // set the initial tempo to 120
  121. _cmMfpUpdateMicrosPerTick(p,60000000/120);
  122. p->msgIdx = 0;
  123. p->mfH = mfH;
  124. p->etime = 0;
  125. p->mtime = 0;
  126. p->closeFileFl= false;
  127. //if( p->msgIdx > 0 )
  128. // p->mtime = p->msgV[0]->tick * p->microsPerTick;
  129. return kOkMfpRC;
  130. }
  131. cmMfpRC_t cmMfpSeek( cmMfpH_t h, unsigned offsUsecs )
  132. {
  133. cmMfp_t* p = _cmMfpHandleToPtr(h);
  134. unsigned msgOffsUsecs = 0;
  135. unsigned msgIdx;
  136. unsigned newMicrosPerTick;
  137. // if the requested offset is past the end of the file then return EOF
  138. if((msgIdx = cmMidiFileSeekUsecs( p->mfH, offsUsecs, &msgOffsUsecs, &newMicrosPerTick )) == cmInvalidIdx )
  139. {
  140. p->msgIdx = p->msgN;
  141. return _cmMfpError(p,kEndOfFileMfpRC);
  142. }
  143. if( msgIdx < p->msgIdx )
  144. p->msgIdx = 0;
  145. p->mtime = msgOffsUsecs;
  146. p->etime = 0;
  147. p->microsPerTick = newMicrosPerTick;
  148. p->msgIdx = msgIdx;
  149. assert(p->mtime >= 0);
  150. return kOkMfpRC;
  151. }
  152. // p 0 1 n 2
  153. // v v v v v
  154. // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
  155. // 012345678901234567890123456780
  156. // 0 1 2
  157. //
  158. // p = 3 = prev msg sent
  159. // n = 19 = next msg to send
  160. // 0 = 6 = call to cmMfpClock()
  161. // 1 = 12 = call to cmMfpClock()
  162. // 2 = 22 = call to cmMfpClock()
  163. //
  164. // dusecs etime mtime
  165. // 0 n/a 3 13
  166. // 1 6 9 7
  167. // 2 10 19 -3
  168. //
  169. cmMfpRC_t cmMfpClock( cmMfpH_t h, unsigned dusecs )
  170. {
  171. cmMfp_t* p = _cmMfpHandleToPtr(h);
  172. if( p->msgIdx >= p->msgN )
  173. return kEndOfFileMfpRC;
  174. // get a pointer to the next msg to send
  175. const cmMidiTrackMsg_t* mp = p->msgV[p->msgIdx];
  176. // p->etime is the interval of time between when the last msg was
  177. // sent and the end of the time window for this mfpClock() cycle
  178. p->etime += dusecs;
  179. //printf("init e:%i d:%i\n",p->etime, p->mtime);
  180. // if the elapsed time (etime) since the last msg is greater or equal
  181. // to the delta time to the next msg (mtime)
  182. while( p->etime >= p->mtime )
  183. {
  184. //printf("e:%i d:%i\n",p->etime, p->mtime);
  185. if( mp->status == kMetaStId && mp->metaId == kTempoMdId )
  186. _cmMfpUpdateMicrosPerTick(p,mp->u.iVal );
  187. p->cbFunc( p->userCbPtr, p->mtime, mp );
  188. ++(p->msgIdx);
  189. if( p->msgIdx >= p->msgN )
  190. break;
  191. // get the next msg to send
  192. mp = p->msgV[p->msgIdx];
  193. // we probably went past the actual mtime - so update etime
  194. // with the delta usecs from the msg just sent and the current time
  195. p->etime -= p->mtime;
  196. // calc the delta usecs from the message just sent to the next msg to send
  197. //p->mtime = (mp->tick - p->msgV[p->msgIdx-1]->tick) * p->microsPerTick;
  198. p->mtime = mp->dtick * p->microsPerTick;
  199. }
  200. return p->msgIdx >= p->msgN ? kEndOfFileMfpRC : kOkMfpRC;
  201. }
  202. void mfpPrint( void* userDataPtr, const char* fmt, va_list vl )
  203. {
  204. vprintf(fmt,vl);
  205. }
  206. // this assumes that the seconds have been normalized to a recent start time
  207. // so as to avoid overflow
  208. unsigned _cmMfpElapsedMicroSecs( const struct timespec* t0, const struct timespec* t1 )
  209. {
  210. // convert seconds to usecs
  211. long u0 = t0->tv_sec * 1000000;
  212. long u1 = t1->tv_sec * 1000000;
  213. // convert nanoseconds to usec
  214. u0 += t0->tv_nsec / 1000;
  215. u1 += t1->tv_nsec / 1000;
  216. // take diff between t1 and t0
  217. return u1 - u0;
  218. }
  219. void _cmMfpTestTimer()
  220. {
  221. useconds_t suspendUsecs = 15 * 1000;
  222. struct timespec t0,t1,t2;
  223. unsigned accum = 0;
  224. unsigned i;
  225. unsigned n = 4000;
  226. // t0 will be the base time which all other times will be
  227. // set relative to.
  228. clock_gettime(CLOCK_REALTIME,&t0);
  229. t2 = t0;
  230. t2.tv_sec = 0;
  231. for(i=0; i<n; ++i)
  232. {
  233. cmSleepUs(suspendUsecs);
  234. clock_gettime(CLOCK_REALTIME,&t1);
  235. t1.tv_sec -= t0.tv_sec;
  236. unsigned d0usec = _cmMfpElapsedMicroSecs(&t0,&t1);
  237. unsigned d1usec = _cmMfpElapsedMicroSecs(&t2,&t1);
  238. accum += d1usec;
  239. if( i == n-1 )
  240. printf("%i %i %i\n",d0usec,d1usec,accum);
  241. t2 = t1;
  242. }
  243. }
  244. // midi file player callback test function
  245. void _cmMfpCallbackTest( void* userCbPtr, unsigned dmicros, const cmMidiTrackMsg_t* msgPtr )
  246. {
  247. if( kNoteOffMdId <= msgPtr->status && msgPtr->status <= kPbendMdId )
  248. cmMpDeviceSend( 0, 0, msgPtr->status+msgPtr->u.chMsgPtr->ch, msgPtr->u.chMsgPtr->d0,msgPtr->u.chMsgPtr->d1);
  249. //printf("%i 0x%x 0x%x %i\n",msgPtr->tick,msgPtr->status,msgPtr->metaId,msgPtr->trkIdx);
  250. }
  251. // midi port callback test function
  252. void _cmMpCallbackTest( const cmMidiPacket_t* pktArray, unsigned pktCnt )
  253. {}
  254. cmMfpRC_t cmMfpTest( const char* fn, cmCtx_t* ctx )
  255. {
  256. cmMfpH_t mfpH = cmMfpNullHandle;
  257. cmMfpRC_t rc;
  258. useconds_t suspendUsecs = 15 * 1000;
  259. struct timespec t0,t1,base;
  260. //unsigned i;
  261. //unsigned n = 4000;
  262. unsigned mdParserBufByteCnt = 1024;
  263. printf("Initializing MIDI Devices...\n");
  264. cmMpInitialize( ctx, _cmMpCallbackTest, NULL, mdParserBufByteCnt,"app" );
  265. //mdReport();
  266. printf("Creating Player...\n");
  267. if((rc = cmMfpCreate( &mfpH, _cmMfpCallbackTest, NULL, ctx )) != kOkMfpRC )
  268. return rc;
  269. printf("Loading MIDI file...\n");
  270. if((rc = cmMfpLoadFile( mfpH, fn )) != kOkMfpRC )
  271. goto errLabel;
  272. if((rc = cmMfpSeek( mfpH, 60 * 1000000 )) != kOkMfpRC )
  273. goto errLabel;
  274. clock_gettime(CLOCK_REALTIME,&base);
  275. t0 = base;
  276. t0.tv_sec = 0;
  277. //for(i=0; i<n; ++i)
  278. while(rc != kEndOfFileMfpRC)
  279. {
  280. cmSleepUs(suspendUsecs);
  281. clock_gettime(CLOCK_REALTIME,&t1);
  282. t1.tv_sec -= base.tv_sec;
  283. unsigned dusecs = _cmMfpElapsedMicroSecs(&t0,&t1);
  284. rc = cmMfpClock( mfpH, dusecs );
  285. //printf("%i %i\n",dusecs,rc);
  286. t0 = t1;
  287. }
  288. errLabel:
  289. cmMfpDestroy(&mfpH);
  290. cmMpFinalize();
  291. return rc;
  292. }
  293. //------------------------------------------------------------------------------------------------------------
  294. #include "cmFloatTypes.h"
  295. #include "cmComplexTypes.h"
  296. #include "cmLinkedHeap.h"
  297. #include "cmSymTbl.h"
  298. #include "cmAudioFile.h"
  299. #include "cmProcObj.h"
  300. #include "cmProcTemplateMain.h"
  301. #include "cmVectOps.h"
  302. #include "cmProc.h"
  303. #include "cmProc2.h"
  304. enum
  305. {
  306. kOkMfptRC = cmOkRC,
  307. kMfpFailMfptRC,
  308. kAudioFileFailMfptRC,
  309. kProcObjFailMfptRC
  310. };
  311. typedef struct
  312. {
  313. cmErr_t* err;
  314. cmMidiSynth* msp;
  315. } _cmMfpTest2CbData_t;
  316. // Called by the MIDI file player to send a msg to the MIDI synth.
  317. void _cmMfpCb( void* userCbPtr, unsigned dmicros, const cmMidiTrackMsg_t* msgPtr )
  318. {
  319. if( kNoteOffMdId <= msgPtr->status && msgPtr->status <= kPbendMdId )
  320. {
  321. cmMidiPacket_t pkt;
  322. cmMidiMsg msg;
  323. _cmMfpTest2CbData_t* d = (_cmMfpTest2CbData_t*)userCbPtr;
  324. msg.deltaUs = dmicros;
  325. msg.status = msgPtr->status + msgPtr->u.chMsgPtr->ch;
  326. msg.d0 = msgPtr->u.chMsgPtr->d0;
  327. msg.d1 = msgPtr->u.chMsgPtr->d1;
  328. pkt.cbDataPtr = NULL;
  329. pkt.devIdx = cmInvalidIdx;
  330. pkt.portIdx = cmInvalidIdx;
  331. pkt.msgArray = &msg;
  332. pkt.sysExMsg = NULL;
  333. pkt.msgCnt = 1;
  334. if( cmMidiSynthOnMidi( d->msp, &pkt, 1 ) != cmOkRC )
  335. cmErrMsg(d->err,kProcObjFailMfptRC,"Synth. MIDI receive failed.");
  336. }
  337. }
  338. // Called by the MIDI synth to send a msg to the voice bank.
  339. int _cmMidiSynthCb( struct cmMidiVoice_str* voicePtr, unsigned sel, cmSample_t* outChArray[], unsigned outChCnt )
  340. {
  341. return cmWtVoiceBankExec( ((cmWtVoiceBank*)voicePtr->pgm.cbDataPtr), voicePtr, sel, outChArray, outChCnt );
  342. }
  343. // BUG BUG BUG: THIS FUNCTION IS NOT TESTED!!!!!
  344. cmRC_t cmMfpTest2( const char* midiFn, const char* audioFn, cmCtx_t* ctx )
  345. {
  346. cmRC_t rc = kOkMfptRC;
  347. cmMfpH_t mfpH = cmMfpNullHandle;
  348. _cmMfpTest2CbData_t cbData;
  349. cmErr_t err;
  350. cmAudioFileH_t afH = cmNullAudioFileH;
  351. cmRC_t afRC = kOkAfRC;
  352. double afSrate = 44100;
  353. unsigned afBits = 16;
  354. unsigned afChCnt = 1;
  355. cmCtx* cctx;
  356. cmMidiSynth* msp;
  357. cmWtVoiceBank* vbp;
  358. unsigned msPgmCnt = 127;
  359. cmMidiSynthPgm msPgmArray[ msPgmCnt ];
  360. unsigned msVoiceCnt = 36;
  361. unsigned procSmpCnt = 64;
  362. unsigned i;
  363. cmErrSetup(&err,&ctx->rpt,"MFP Test 2");
  364. // create the MIDI file player
  365. if( cmMfpCreate(&mfpH, _cmMfpCb, &cbData, ctx ) != kOkMfpRC )
  366. return cmErrMsg(&err,kMfpFailMfptRC,"MIDI file player create failed.");
  367. // create an output audio file
  368. if( cmAudioFileIsValid( afH = cmAudioFileNewCreate(audioFn, afSrate, afBits, afChCnt, &afRC, &ctx->rpt))==false)
  369. {
  370. rc = cmErrMsg(&err,kAudioFileFailMfptRC,"The audio file create failed.");
  371. goto errLabel;
  372. }
  373. // load the midi file into the player
  374. if( cmMfpLoadFile( mfpH, midiFn ) != kOkMfpRC )
  375. {
  376. rc = cmErrMsg(&err,kMfpFailMfptRC,"MIDI file load failed.");
  377. goto errLabel;
  378. }
  379. // create the proc obj context
  380. if((cctx = cmCtxAlloc(NULL, &ctx->rpt, cmLHeapNullHandle, cmSymTblNullHandle )) == NULL)
  381. {
  382. rc = cmErrMsg(&err,kProcObjFailMfptRC,"cmCtx allocate failed.");
  383. goto errLabel;
  384. }
  385. // create the voice bank
  386. if((vbp = cmWtVoiceBankAlloc(cctx, NULL, afSrate, procSmpCnt, msVoiceCnt, afChCnt )) == NULL)
  387. {
  388. rc = cmErrMsg(&err,kProcObjFailMfptRC,"WT voice bank allocate failed.");
  389. goto errLabel;
  390. }
  391. // a MIDI synth
  392. if((msp = cmMidiSynthAlloc(cctx, NULL, msPgmArray, msPgmCnt, msVoiceCnt, procSmpCnt, afChCnt, afSrate )) == NULL )
  393. {
  394. rc = cmErrMsg(&err,kProcObjFailMfptRC,"MIDI synth allocate failed.");
  395. goto errLabel;
  396. }
  397. cbData.msp = msp;
  398. cbData.err = &err;
  399. // load all of the the MIDI pgm recds with the same settings
  400. for(i=0; i<msPgmCnt; ++i)
  401. {
  402. msPgmArray[i].pgm = i;
  403. msPgmArray[i].cbPtr = _cmMidiSynthCb; // Call this function to update voices using this pgm
  404. msPgmArray[i].cbDataPtr = vbp; // Voice bank containing the voice states.
  405. }
  406. unsigned dusecs = floor((double)procSmpCnt * 1000000. / afSrate);
  407. while(rc != kEndOfFileMfpRC)
  408. {
  409. // update the MFP's current time and call _cmMfpCb() for MIDI msgs whose time has elapsed
  410. rc = cmMfpClock( mfpH, dusecs );
  411. // check for MFP errors
  412. if(rc!=kOkMfpRC && rc!=kEndOfFileMfpRC)
  413. {
  414. cmErrMsg(&err,kMfpFailMfptRC,"MIDI file player exec failed.");
  415. goto errLabel;
  416. }
  417. // generate audio based on the current state of the synth voices
  418. if( cmMidiSynthExec(msp, NULL, 0 ) != cmOkRC )
  419. {
  420. cmErrMsg(&err,kProcObjFailMfptRC,"MIDI synth exec. failed.");
  421. goto errLabel;
  422. }
  423. // write the last frame of synth. generated audio to the output file
  424. if( cmAudioFileWriteSample(afH, procSmpCnt, msp->outChCnt, msp->outChArray ) != kOkAfRC )
  425. {
  426. cmErrMsg(&err,kProcObjFailMfptRC,"Audio file write failed.");
  427. goto errLabel;
  428. }
  429. }
  430. errLabel:
  431. if( cmMidiSynthFree(&msp) != cmOkRC )
  432. cmErrMsg(&err,kProcObjFailMfptRC,"MIDI synth. free failed.");
  433. if( cmWtVoiceBankFree(&vbp) != cmOkRC )
  434. cmErrMsg(&err,kProcObjFailMfptRC,"WT voice free failed.");
  435. if( cmCtxFree(&cctx) != cmOkRC )
  436. cmErrMsg(&err,kProcObjFailMfptRC,"cmCtx free failed.");
  437. if( cmAudioFileDelete(&afH) )
  438. cmErrMsg(&err,kAudioFileFailMfptRC,"The audio file close failed.");
  439. if( cmMfpDestroy(&mfpH) != kOkMfpRC )
  440. cmErrMsg(&err,kMfpFailMfptRC,"MIDI file player destroy failed.");
  441. return rc;
  442. }