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