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

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  1. #include "cmGlobal.h"
  2. #include "cmFloatTypes.h"
  3. #include "cmRpt.h"
  4. #include "cmErr.h"
  5. #include "cmMem.h"
  6. #include "cmMallocDebug.h"
  7. #include "cmAudioFile.h"
  8. #include "cmThread.h"
  9. #include "cmAudioPort.h"
  10. #include "cmAudioFileDev.h"
  11. #include "cmTime.h"
  12. cmAfdH_t cmAfdNullHandle = cmSTATIC_NULL_HANDLE;
  13. #define cmAfd_Billion (1000000000)
  14. #define cmAfd_Million (1000000)
  15. typedef struct
  16. {
  17. cmErr_t err; // error object
  18. cmApCallbackPtr_t callbackPtr; // client callback function
  19. void* cbDataPtr; // argument to be passed with the client callback
  20. unsigned devIdx;
  21. cmChar_t* label;
  22. cmChar_t* oFn;
  23. unsigned oBits;
  24. unsigned oChCnt;
  25. cmAudioFileH_t iAfH; // audio input file handle
  26. cmAudioFileH_t oAfH; // audio output file handle
  27. cmThreadH_t tH; // thread handle
  28. double srate; // file device sample rate
  29. unsigned framesPerCycle; // count of samples sent/recv'd from the client on each callback
  30. cmApAudioPacket_t iPkt; // audio packet used sent to the client via callbackPtr.
  31. cmApAudioPacket_t oPkt; //
  32. cmApSample_t** iChArray; // audio buffer channel arrays used with cmAudioFile
  33. cmApSample_t** oChArray; //
  34. bool runFl; // set to true as long as the thread should continue looping
  35. bool rewindFl; // set to true when the input file should rewind
  36. unsigned readErrCnt; // count of read errors from the input file
  37. bool eofFl; // set to true when the input file reaches the EOF
  38. unsigned writeErrCnt; // count of write errors from the output file
  39. long nanosPerCycle; // nano-seconds per cycle
  40. struct timespec baseTime;
  41. struct timespec nextTime; // next execution time
  42. unsigned cycleCnt; // count of cycles completed
  43. } cmAfd_t;
  44. cmAfd_t* _cmAfdHandleToPtr( cmAfdH_t h )
  45. {
  46. cmAfd_t* p = (cmAfd_t*)h.h;
  47. assert(p != NULL );
  48. return p;
  49. }
  50. //
  51. void _cmAudioFileDevExec( cmAfd_t* p )
  52. {
  53. unsigned iPktCnt = 0;
  54. unsigned oPktCnt = p->oPkt.chCnt!=0;
  55. // if the input device is enabled
  56. if( p->iPkt.chCnt )
  57. {
  58. unsigned actualFrmCnt = p->framesPerCycle;
  59. // if the input file has reached EOF - zero the input buffer
  60. if( p->eofFl )
  61. memset(p->iPkt.audioBytesPtr,0,p->framesPerCycle*sizeof(cmApSample_t));
  62. else
  63. {
  64. // otherwise fill the input buffer from the input file
  65. if( cmAudioFileReadSample(p->iAfH, p->framesPerCycle, p->iPkt.begChIdx, p->iPkt.chCnt, p->iChArray, &actualFrmCnt) != kOkAfRC )
  66. ++p->readErrCnt;
  67. // if the input file reachged EOF the set p->eofFl
  68. if( (actualFrmCnt < p->framesPerCycle) && cmAudioFileIsEOF(p->iAfH) )
  69. p->eofFl = true;
  70. }
  71. iPktCnt = actualFrmCnt>0;
  72. }
  73. // callback to the client to provde incoming samples and receive outgoing samples
  74. p->callbackPtr(iPktCnt ? &p->iPkt : NULL, iPktCnt, oPktCnt ? &p->oPkt : NULL, oPktCnt );
  75. // if the output device is enabled
  76. if( p->oPkt.chCnt )
  77. {
  78. // write the output samples
  79. if( cmAudioFileWriteSample( p->oAfH, p->framesPerCycle, p->oPkt.chCnt, p->oChArray ) != kOkAfRC )
  80. ++p->writeErrCnt;
  81. }
  82. ++p->cycleCnt;
  83. }
  84. // incrment p->nextTime to the next execution time
  85. void _cmAfdIncrNextTime( cmAfd_t* p )
  86. {
  87. long nsec = p->nextTime.tv_nsec + p->nanosPerCycle;
  88. if( nsec < cmAfd_Billion )
  89. p->nextTime.tv_nsec = nsec;
  90. else
  91. {
  92. p->nextTime.tv_sec += 1;
  93. p->nextTime.tv_nsec = nsec - cmAfd_Billion;
  94. }
  95. }
  96. // calc the time between t1 and t0 - t1 is assummed to come after t0 in order to produce a positive result
  97. long _cmAfdDiffMicros( const struct timespec* t0, const struct timespec* t1 )
  98. {
  99. long u0 = t0->tv_sec * cmAfd_Million;
  100. long u1 = t1->tv_sec * cmAfd_Million;
  101. u0 += t0->tv_nsec / 1000;
  102. u1 += t1->tv_nsec / 1000;
  103. return u1 - u0;
  104. }
  105. // thread callback function
  106. bool _cmAudioDevThreadFunc(void* param)
  107. {
  108. cmAfd_t* p = (cmAfd_t*)param;
  109. struct timespec t0;
  110. // if this is the first time this callback has been called after a call to cmAudioFileDevStart().
  111. if( p->cycleCnt == 0 )
  112. {
  113. // get the baseTime - all other times will be relative to this time
  114. cmTimeGet(&p->baseTime);
  115. p->nextTime = p->baseTime;
  116. p->nextTime.tv_sec = 0;
  117. _cmAfdIncrNextTime(p);
  118. }
  119. // if the thread has not been requested to stop
  120. if( p->runFl )
  121. {
  122. // get the current time as an offset from baseTime.
  123. cmTimeGet(&t0);
  124. t0.tv_sec -= p->baseTime.tv_sec;
  125. // get length of time to next exec point
  126. long dusec = _cmAfdDiffMicros(&t0, &p->nextTime);
  127. // if the execution time has not yet arrived
  128. if( dusec > 0 )
  129. {
  130. cmSleepUs(dusec);
  131. }
  132. // if the thread is still running
  133. if( p->runFl )
  134. {
  135. // read/callback/write
  136. _cmAudioFileDevExec(p);
  137. // calc the next exec time
  138. _cmAfdIncrNextTime(p);
  139. }
  140. }
  141. return p->runFl;
  142. }
  143. cmAfdRC_t cmAudioFileDevInitialize(
  144. cmAfdH_t* hp,
  145. const cmChar_t* label,
  146. unsigned devIdx,
  147. const cmChar_t* iFn,
  148. const cmChar_t* oFn,
  149. unsigned oBits,
  150. unsigned oChCnt,
  151. cmRpt_t* rpt )
  152. {
  153. cmAfdRC_t rc;
  154. cmRC_t afRC;
  155. if((rc = cmAudioFileDevFinalize(hp)) != kOkAfdRC )
  156. return rc;
  157. // allocate the object
  158. cmAfd_t* p = cmMemAllocZ(cmAfd_t,1);
  159. hp->h = p;
  160. cmErrSetup(&p->err,rpt,"AudioFileDevice");
  161. // create the input audio file handle
  162. if( iFn != NULL )
  163. {
  164. cmAudioFileInfo_t afInfo;
  165. // open the input file
  166. if(cmAudioFileIsValid( p->iAfH = cmAudioFileNewOpen(iFn,&afInfo,&afRC,rpt)) == false )
  167. {
  168. rc = cmErrMsg(&p->err,kAudioFileFailAfdRC,"The audio input file '%s' could not be opened.", iFn);
  169. goto errLabel;
  170. }
  171. p->iPkt.devIdx = devIdx;
  172. p->iPkt.begChIdx = 0;
  173. p->iPkt.chCnt = afInfo.chCnt; // setting iPkt.chCnt to a non-zero value marks the input file as active
  174. p->iPkt.audioFramesCnt = 0;
  175. p->iPkt.bitsPerSample = afInfo.bits;
  176. p->iPkt.flags = kFloatApFl;
  177. p->iPkt.audioBytesPtr = NULL;
  178. p->iChArray = cmMemResizeZ( cmApSample_t*, p->iChArray, afInfo.chCnt );
  179. p->readErrCnt = 0;
  180. p->eofFl = false;
  181. }
  182. // create the output audio file handle
  183. if(cmAudioFileIsValid( p->oAfH = cmAudioFileNewOpen(NULL,NULL,NULL,rpt)) == false )
  184. {
  185. rc = cmErrMsg(&p->err,kAudioFileFailAfdRC,"The audio output file object allocation failed.");
  186. goto errLabel;
  187. }
  188. // create the driver thread
  189. if( cmThreadCreate(&p->tH, _cmAudioDevThreadFunc, p, rpt ) != kOkThRC )
  190. {
  191. rc = cmErrMsg(&p->err,kThreadFailAfdRC,"The internal thread could not be created.");
  192. goto errLabel;
  193. }
  194. p->runFl = true;
  195. p->devIdx = devIdx;
  196. p->label = cmMemAllocStr(label);
  197. p->oFn = cmMemAllocStr(oFn);
  198. p->oBits = oBits;
  199. p->oChCnt = oChCnt;
  200. errLabel:
  201. if( rc != kOkAfdRC )
  202. cmAudioFileDevFinalize(hp);
  203. return rc;
  204. }
  205. cmAfdRC_t cmAudioFileDevFinalize( cmAfdH_t* hp )
  206. {
  207. if( hp == NULL || cmAudioFileDevIsValid(*hp) == false )
  208. return kOkAfdRC;
  209. cmAfd_t* p = _cmAfdHandleToPtr(*hp);
  210. p->runFl = false;
  211. if( cmThreadIsValid(p->tH) )
  212. cmThreadDestroy(&p->tH);
  213. cmAudioFileDelete(&p->iAfH);
  214. cmAudioFileDelete(&p->oAfH);
  215. cmMemPtrFree(&p->label);
  216. cmMemPtrFree(&p->oFn);
  217. cmMemPtrFree(&p->iPkt.audioBytesPtr);
  218. cmMemPtrFree(&p->oPkt.audioBytesPtr);
  219. cmMemPtrFree(&p->iChArray);
  220. cmMemPtrFree(&p->oChArray);
  221. cmMemPtrFree(&p);
  222. hp->h = NULL;
  223. return kOkAfdRC;
  224. }
  225. bool cmAudioFileDevIsValid( cmAfdH_t h )
  226. { return h.h != NULL; }
  227. cmAfdRC_t cmAudioFileDevSetup(
  228. cmAfdH_t h,
  229. unsigned baseDevIdx,
  230. double srate,
  231. unsigned framesPerCycle,
  232. cmApCallbackPtr_t callbackPtr,
  233. void* cbDataPtr )
  234. {
  235. cmAfdRC_t rc = kOkAfdRC;
  236. bool restartFl = false;
  237. unsigned i;
  238. if( cmAudioFileDevIsStarted(h) )
  239. {
  240. if((rc = cmAudioFileDevStop(h)) != kOkAfdRC )
  241. return rc;
  242. restartFl = true;
  243. }
  244. cmAfd_t* p = _cmAfdHandleToPtr(h);
  245. /*
  246. // close the existing input file
  247. if(cmAudioFileClose(&p->iAfH) != kOkAfRC )
  248. rc = cmErrMsg(&p->err,kAudioFileFailAfdRC,"Audio file close failed on input audio file.");
  249. p->iPkt.chCnt = 0; // mark the input file as inactive
  250. */
  251. if( cmAudioFileIsValid( p->iAfH ) )
  252. if( cmAudioFileSeek( p->iAfH, 0 ) != kOkAfRC )
  253. rc = cmErrMsg(&p->err,kAudioFileFailAfdRC,"Audio file device rewind failed.");
  254. // close the existing output file
  255. if(cmAudioFileClose(&p->oAfH) != kOkAfRC )
  256. rc = cmErrMsg(&p->err,kAudioFileFailAfdRC,"Audio file close failed on output audio file.");
  257. p->oPkt.chCnt = 0; // mark the output file as inactive
  258. // if an output audio file was given ...
  259. if( p->oFn != NULL )
  260. {
  261. // ... then open it
  262. if( cmAudioFileCreate( p->oAfH, p->oFn, srate, p->oBits, p->oChCnt ) != kOkAfRC )
  263. {
  264. rc = cmErrMsg(&p->err,kAudioFileFailAfdRC, "The audio output file '%s' could not be created.",p->oFn);
  265. goto errLabel;
  266. }
  267. cmApSample_t* bp = (cmApSample_t*)p->oPkt.audioBytesPtr;
  268. p->oPkt.devIdx = p->devIdx + baseDevIdx;
  269. p->oPkt.begChIdx = 0;
  270. p->oPkt.chCnt = p->oChCnt;
  271. p->oPkt.audioFramesCnt = framesPerCycle;
  272. p->oPkt.bitsPerSample = p->oBits;
  273. p->oPkt.flags = kFloatApFl;
  274. p->oPkt.audioBytesPtr = bp = cmMemResizeZ( cmApSample_t, bp, framesPerCycle*p->oChCnt );
  275. p->oPkt.userCbPtr = cbDataPtr;
  276. p->oChArray = cmMemResizeZ( cmApSample_t*, p->oChArray, p->oChCnt );
  277. for(i=0; i<p->oChCnt; ++i)
  278. p->oChArray[i] = bp + (i*framesPerCycle);
  279. }
  280. if( cmAudioFileIsValid( p->iAfH) )
  281. {
  282. cmApSample_t* bp = (cmApSample_t*)p->iPkt.audioBytesPtr;
  283. p->iPkt.devIdx = p->devIdx + baseDevIdx;
  284. p->iPkt.audioFramesCnt = framesPerCycle;
  285. p->iPkt.audioBytesPtr = bp = cmMemResizeZ( cmApSample_t, bp, framesPerCycle*p->iPkt.chCnt ); ;
  286. p->iPkt.userCbPtr = cbDataPtr;
  287. for(i=0; i<p->iPkt.chCnt; ++i)
  288. p->iChArray[i] = bp + (i*framesPerCycle);
  289. }
  290. p->callbackPtr = callbackPtr;
  291. p->cbDataPtr = cbDataPtr;
  292. p->framesPerCycle = framesPerCycle;
  293. p->srate = srate;
  294. p->cycleCnt = 0;
  295. p->nanosPerCycle = floor((double)framesPerCycle / srate * cmAfd_Billion );
  296. if( restartFl )
  297. {
  298. if((rc = cmAudioFileDevStart(h)) != kOkAfdRC )
  299. {
  300. rc = cmErrMsg(&p->err,kRestartFailAfdRC,"The audio file device could not be restarted.");
  301. }
  302. }
  303. errLabel:
  304. return rc;
  305. }
  306. const char* cmAudioFileDevLabel( cmAfdH_t h )
  307. {
  308. cmAfd_t* p = _cmAfdHandleToPtr(h);
  309. return p->label;
  310. }
  311. unsigned cmAudioFileDevChannelCount( cmAfdH_t h, bool inputFl )
  312. {
  313. cmAfd_t* p = _cmAfdHandleToPtr(h);
  314. return inputFl ? p->iPkt.chCnt : p->oPkt.chCnt;
  315. }
  316. double cmAudioFileDevSampleRate( cmAfdH_t h )
  317. {
  318. cmAfd_t* p = _cmAfdHandleToPtr(h);
  319. return p->srate;
  320. }
  321. unsigned cmAudioFileDevFramesPerCycle( cmAfdH_t h, bool inputFl )
  322. {
  323. cmAfd_t* p = _cmAfdHandleToPtr(h);
  324. return inputFl ? p->iPkt.audioFramesCnt : p->oPkt.audioFramesCnt;
  325. }
  326. cmAfdRC_t cmAudioFileDevRewind( cmAfdH_t h )
  327. {
  328. cmAfd_t* p = _cmAfdHandleToPtr(h);
  329. p->rewindFl = true;
  330. return kOkAfdRC;
  331. }
  332. cmAfdRC_t cmAudioFileDevStart( cmAfdH_t h )
  333. {
  334. cmAfdRC_t rc = kOkAfdRC;
  335. cmAfd_t* p = _cmAfdHandleToPtr(h);
  336. p->cycleCnt = 0;
  337. if( cmThreadPause( p->tH, 0 ) != kOkThRC )
  338. {
  339. rc = cmErrMsg(&p->err,kThreadFailAfdRC,"Thread start failed.");
  340. goto errLabel;
  341. }
  342. fputs("Start\n",stderr);
  343. errLabel:
  344. return rc;
  345. }
  346. cmAfdRC_t cmAudioFileDevStop( cmAfdH_t h )
  347. {
  348. cmAfdRC_t rc = kOkAfdRC;
  349. cmAfd_t* p = _cmAfdHandleToPtr(h);
  350. if( cmThreadPause( p->tH, kPauseThFl | kWaitThFl ) != kOkThRC )
  351. {
  352. rc = cmErrMsg(&p->err,kThreadFailAfdRC,"Thread stop failed.");
  353. goto errLabel;
  354. }
  355. fputs("Stop\n",stderr);
  356. errLabel:
  357. return rc;
  358. }
  359. bool cmAudioFileDevIsStarted( cmAfdH_t h )
  360. {
  361. cmAfd_t* p = _cmAfdHandleToPtr(h);
  362. return cmThreadState(p->tH) == kRunningThId;
  363. }
  364. void cmAudioFileDevReport( cmAfdH_t h, cmRpt_t* rpt )
  365. {
  366. cmAfd_t* p = _cmAfdHandleToPtr(h);
  367. cmRptPrintf(rpt,"label:%s thr state:%i srate:%f\n",p->label,cmThreadState(p->tH),p->srate);
  368. cmRptPrintf(rpt, "in chs:%i %s\n",p->iPkt.chCnt,cmAudioFileName(p->iAfH));
  369. cmRptPrintf(rpt, "out chs:%i %s\n",p->oPkt.chCnt,p->oFn);
  370. }
  371. // device callback function used with cmAudioFileDevTest() note that this assumes
  372. // that the packet buffer contain non-interleaved data.
  373. void _cmAfdCallback(
  374. cmApAudioPacket_t* inPktArray,
  375. unsigned inPktCnt,
  376. cmApAudioPacket_t* outPktArray,
  377. unsigned outPktCnt )
  378. {
  379. cmApAudioPacket_t* ip = inPktArray;
  380. cmApAudioPacket_t* op = outPktArray;
  381. unsigned opi = 0;
  382. unsigned ipi = 0;
  383. unsigned oci = 0;
  384. unsigned ici = 0;
  385. while(1)
  386. {
  387. if( ici == ip->chCnt)
  388. {
  389. ici = 0;
  390. if( ++ipi >= inPktCnt )
  391. break;
  392. ip = inPktArray + ipi;
  393. }
  394. if( oci == op->chCnt )
  395. {
  396. oci = 0;
  397. if( ++opi >= outPktCnt )
  398. break;
  399. ip = outPktArray + opi;
  400. }
  401. assert( ip->audioFramesCnt == op->audioFramesCnt );
  402. assert( cmIsFlag(ip->flags,kInterleavedApFl)==false && cmIsFlag(ip->flags,kInterleavedApFl)==false );
  403. cmApSample_t* ibp = ((cmApSample_t*)ip->audioBytesPtr) + (ip->audioFramesCnt*ici);
  404. cmApSample_t* obp = ((cmApSample_t*)op->audioBytesPtr) + (op->audioFramesCnt*oci);
  405. memcpy(obp,ibp,ip->audioFramesCnt*sizeof(cmApSample_t));
  406. ++ici;
  407. ++oci;
  408. }
  409. }
  410. void cmAudioFileDevTest( cmRpt_t* rpt )
  411. {
  412. cmAfdH_t afdH = cmAfdNullHandle;
  413. double srate = 44100;
  414. unsigned framesPerCycle = 512;
  415. void* cbDataPtr = NULL;
  416. unsigned devIdx = 0;
  417. const cmChar_t* iFn = "/home/kevin/media/audio/McGill-1/1 Audio Track.aiff";
  418. const cmChar_t* oFn = "/home/kevin/temp/afd0.aif";
  419. unsigned oBits = 16;
  420. unsigned oChCnt = 2;
  421. if( cmAudioFileDevInitialize(&afdH,"file",devIdx,iFn,oFn,oBits,oChCnt,rpt) != kOkAfdRC )
  422. goto errLabel;
  423. if( cmAudioFileDevSetup(afdH,0,srate,framesPerCycle,_cmAfdCallback,cbDataPtr) != kOkAfdRC )
  424. goto errLabel;
  425. char c;
  426. fputs("q=quit 1=start 0=stop\n",stderr);
  427. fflush(stderr);
  428. while((c=getchar()) != 'q')
  429. {
  430. switch(c)
  431. {
  432. case '1': cmAudioFileDevStart(afdH); break;
  433. case '0': cmAudioFileDevStop(afdH); break;
  434. }
  435. c = 0;
  436. fflush(stdin);
  437. }
  438. errLabel:
  439. cmAudioFileDevFinalize(&afdH);
  440. }