libcm is a C development framework with an emphasis on audio signal processing applications.
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cmAudioNrtDev.c 8.3KB

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  1. #include "cmGlobal.h"
  2. #include "cmFloatTypes.h"
  3. #include "cmRpt.h"
  4. #include "cmErr.h"
  5. #include "cmCtx.h"
  6. #include "cmMem.h"
  7. #include "cmMallocDebug.h"
  8. #include "cmAudioPort.h"
  9. #include "cmAudioNrtDev.h"
  10. #include "cmThread.h"
  11. enum
  12. {
  13. kStartedApNrtFl = 0x01,
  14. kInStateApNrtFl = 0x02
  15. };
  16. typedef struct
  17. {
  18. unsigned phase;
  19. bool implFl;
  20. double gain;
  21. } cmApNrtCh_t;
  22. typedef struct cmApNrtDev_str
  23. {
  24. unsigned flags;
  25. unsigned devIdx; // nrt device index
  26. unsigned baseApDevIdx; // global audio device index for first nrt device
  27. cmChar_t* label;
  28. unsigned iChCnt;
  29. unsigned oChCnt;
  30. double srate;
  31. unsigned fpc;
  32. cmThreadH_t thH;
  33. cmApCallbackPtr_t cbPtr;
  34. void* cbArg;
  35. unsigned cbPeriodMs;
  36. struct cmApNrtDev_str* link;
  37. unsigned curTimeSmp;
  38. cmApNrtCh_t* iChArray;
  39. cmApNrtCh_t* oChArray;
  40. } cmApNrtDev_t;
  41. typedef struct
  42. {
  43. cmErr_t err;
  44. unsigned devCnt;
  45. cmApNrtDev_t* devs;
  46. unsigned baseApDevIdx;
  47. } cmApNrt_t;
  48. cmApNrt_t* _cmNrt = NULL;
  49. cmApNrtDev_t* _cmApNrtIndexToDev( unsigned idx )
  50. {
  51. cmApNrtDev_t* dp = _cmNrt->devs;
  52. unsigned i;
  53. for(i=0; dp!=NULL && i<idx; ++i)
  54. dp = dp->link;
  55. assert( dp != NULL );
  56. return dp;
  57. }
  58. void cmApNrtGenImpulseCh( cmApNrtDev_t* dp, unsigned chIdx, cmSample_t* buf, unsigned chCnt, unsigned frmCnt )
  59. {
  60. double periodMs = 500; // impulse period
  61. double durMs = 50; // impulse length
  62. double loDb = -90.0;
  63. double hiDb = -20.0;
  64. double loLin = pow(10.0,loDb/20.0);
  65. double hiLin = pow(10.0,hiDb/20.0);
  66. unsigned periodSmp = (unsigned)(periodMs * dp->srate / 1000.0);
  67. unsigned durSmp = (unsigned)( durMs * dp->srate / 1000.0);
  68. assert( chIdx < chCnt );
  69. cmApNrtCh_t* cp = dp->iChArray + chIdx;
  70. cmSample_t* sp = buf + chIdx;
  71. unsigned i;
  72. for(i=0; i<frmCnt; ++i, sp+=chCnt )
  73. {
  74. unsigned limit = periodSmp;
  75. double gain = loLin;
  76. cp->phase += 1;
  77. if( cp->implFl )
  78. {
  79. gain = cp->gain;
  80. limit = durSmp;
  81. }
  82. *sp = (gain * 2.0 * rand()/RAND_MAX) - 1.0;
  83. if( cp->phase > limit )
  84. {
  85. cp->phase = 0;
  86. cp->implFl = !cp->implFl;
  87. if( cp->implFl )
  88. cp->gain = loLin + (hiLin - loLin) * rand()/RAND_MAX ;
  89. }
  90. }
  91. }
  92. void cmApNrtGenImpulse( cmApNrtDev_t* dp, cmSample_t* buf, unsigned chCnt, unsigned frmCnt )
  93. {
  94. unsigned i=0;
  95. for(; i<chCnt; ++i)
  96. cmApNrtGenImpulseCh(dp,i,buf,chCnt,frmCnt);
  97. }
  98. void cmApNrtGenSamples( cmApNrtDev_t* dp, cmSample_t* buf, unsigned chCnt, unsigned frmCnt )
  99. {
  100. memset(buf,0,chCnt*frmCnt*sizeof(cmSample_t));
  101. cmApNrtGenImpulse(dp,buf,chCnt,frmCnt);
  102. dp->curTimeSmp += frmCnt;
  103. }
  104. // return 'false' to terminate otherwise return 'true'.
  105. bool cmApNrtThreadFunc(void* param)
  106. {
  107. cmApNrtDev_t* dp = (cmApNrtDev_t*)param;
  108. usleep( dp->cbPeriodMs * 1000 );
  109. cmApAudioPacket_t pkt;
  110. bool inFl = cmIsFlag(dp->flags,kInStateApNrtFl);
  111. pkt.devIdx = dp->devIdx + dp->baseApDevIdx;
  112. pkt.begChIdx = 0;
  113. pkt.audioFramesCnt = dp->fpc;
  114. pkt.bitsPerSample = 32;
  115. pkt.flags = kInterleavedApFl | kFloatApFl;
  116. pkt.userCbPtr = dp->cbArg;
  117. if( inFl )
  118. {
  119. unsigned bn = dp->iChCnt * dp->fpc;
  120. cmSample_t b[ bn ];
  121. pkt.chCnt = dp->iChCnt;
  122. pkt.audioBytesPtr = b;
  123. cmApNrtGenSamples(dp,b,dp->iChCnt,dp->fpc);
  124. dp->cbPtr(&pkt,1,NULL,0 ); // send the samples to the application
  125. }
  126. else
  127. {
  128. unsigned bn = dp->oChCnt * dp->fpc;
  129. cmSample_t b[ bn ];
  130. pkt.chCnt = dp->oChCnt;
  131. pkt.audioBytesPtr = b;
  132. dp->cbPtr(NULL,0,&pkt,1 ); // recv the samples from the application
  133. }
  134. dp->flags = cmTogFlag(dp->flags,kInStateApNrtFl);
  135. return true;
  136. }
  137. cmApRC_t cmApNrtAllocate( cmRpt_t* rpt )
  138. {
  139. if( _cmNrt != NULL )
  140. cmApNrtFree();
  141. _cmNrt = cmMemAllocZ(cmApNrt_t,1);
  142. cmErrSetup(&_cmNrt->err,rpt,"cmAudioNrtDev");
  143. _cmNrt->devCnt = 0;
  144. _cmNrt->devs = NULL;
  145. _cmNrt->baseApDevIdx = 0;
  146. return kOkApRC;
  147. }
  148. cmApRC_t cmApNrtFree()
  149. {
  150. cmApRC_t rc = kOkApRC;
  151. cmApNrtDev_t* dp = _cmNrt->devs;
  152. while( dp != NULL )
  153. {
  154. cmApNrtDev_t* np = dp->link;
  155. if( cmThreadIsValid(dp->thH) )
  156. if( cmThreadDestroy(&dp->thH) != kOkThRC )
  157. rc = cmErrMsg(&_cmNrt->err,kThreadFailApRC,"Thread destroy failed.");
  158. cmMemFree(dp->label);
  159. cmMemFree(dp->iChArray);
  160. cmMemFree(dp->oChArray);
  161. cmMemFree(dp);
  162. dp = np;
  163. }
  164. if( rc == kOkApRC )
  165. {
  166. cmMemPtrFree(&_cmNrt);
  167. }
  168. return rc;
  169. }
  170. cmApRC_t cmApNrtCreateDevice(
  171. const cmChar_t* label,
  172. double srate,
  173. unsigned iChCnt,
  174. unsigned oChCnt,
  175. unsigned cbPeriodMs )
  176. {
  177. cmApRC_t rc = kOkApRC;
  178. cmApNrtDev_t* dp = cmMemAllocZ(cmApNrtDev_t,1);
  179. dp->devIdx = _cmNrt->devCnt;
  180. dp->baseApDevIdx = _cmNrt->baseApDevIdx;
  181. dp->label = cmMemAllocStr(label);
  182. dp->iChCnt = iChCnt;
  183. dp->oChCnt = oChCnt;
  184. dp->srate = srate;
  185. dp->fpc = 0;
  186. dp->cbPeriodMs = cbPeriodMs;
  187. dp->cbPtr = NULL;
  188. dp->cbArg = NULL;
  189. dp->link = NULL;
  190. dp->iChArray = iChCnt==0 ? NULL : cmMemAllocZ(cmApNrtCh_t,iChCnt);
  191. dp->oChArray = oChCnt==0 ? NULL : cmMemAllocZ(cmApNrtCh_t,oChCnt);
  192. // attach the new recd to the end of the list
  193. cmApNrtDev_t* np = _cmNrt->devs;
  194. while( np != NULL && np->link != NULL )
  195. np = np->link;
  196. if( np == NULL )
  197. _cmNrt->devs = dp;
  198. else
  199. np->link = dp;
  200. if( cmThreadCreate( &dp->thH, cmApNrtThreadFunc, dp, _cmNrt->err.rpt ) != kOkThRC )
  201. rc = cmErrMsg(&_cmNrt->err,kThreadFailApRC,"Thread create failed.");
  202. ++_cmNrt->devCnt;
  203. return rc;
  204. }
  205. cmApRC_t cmApNrtInitialize( cmRpt_t* rpt, unsigned baseApDevIdx )
  206. {
  207. // set the baseApDevIdx for each device
  208. cmApNrtDev_t* dp = _cmNrt->devs;
  209. for(; dp!=NULL; dp=dp->link)
  210. dp->baseApDevIdx = baseApDevIdx;
  211. // store the baseApDevIdx for any devices that may be created after initialization
  212. _cmNrt->baseApDevIdx = baseApDevIdx;
  213. return kOkApRC;
  214. }
  215. cmApRC_t cmApNrtFinalize()
  216. {
  217. return kOkApRC;
  218. }
  219. unsigned cmApNrtDeviceCount()
  220. { return _cmNrt==NULL ? 0 : _cmNrt->devCnt; }
  221. const char* cmApNrtDeviceLabel( unsigned devIdx )
  222. {
  223. assert( devIdx < _cmNrt->devCnt );
  224. const cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  225. return dp->label;
  226. }
  227. unsigned cmApNrtDeviceChannelCount( unsigned devIdx, bool inputFl )
  228. {
  229. assert( devIdx < _cmNrt->devCnt );
  230. const cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  231. return inputFl ? dp->iChCnt : dp->oChCnt;
  232. }
  233. double cmApNrtDeviceSampleRate( unsigned devIdx )
  234. {
  235. assert( devIdx < _cmNrt->devCnt );
  236. const cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  237. return dp->srate;
  238. }
  239. unsigned cmApNrtDeviceFramesPerCycle( unsigned devIdx, bool inputFl )
  240. {
  241. assert( devIdx < _cmNrt->devCnt );
  242. const cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  243. return dp->fpc;
  244. }
  245. cmApRC_t cmApNrtDeviceSetup(
  246. unsigned devIdx,
  247. double srate,
  248. unsigned framesPerCycle,
  249. cmApCallbackPtr_t callbackPtr,
  250. void* userCbPtr )
  251. {
  252. assert( devIdx < _cmNrt->devCnt );
  253. cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  254. dp->srate = srate;
  255. dp->fpc = framesPerCycle;
  256. dp->cbPtr = callbackPtr;
  257. dp->cbArg = userCbPtr;
  258. return kOkApRC;
  259. }
  260. cmApRC_t cmApNrtDeviceStart( unsigned devIdx )
  261. {
  262. assert( devIdx < _cmNrt->devCnt );
  263. cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  264. dp->curTimeSmp = 0;
  265. if( cmThreadPause( dp->thH, 0 ) != kOkThRC )
  266. return cmErrMsg(&_cmNrt->err,kThreadFailApRC,"Thread start failed.");
  267. dp->flags = cmSetFlag(dp->flags,kStartedApNrtFl);
  268. return kOkApRC;
  269. }
  270. cmApRC_t cmApNrtDeviceStop( unsigned devIdx )
  271. {
  272. assert( devIdx < _cmNrt->devCnt );
  273. cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  274. if( cmThreadPause( dp->thH, kPauseThFl ) != kOkThRC )
  275. return cmErrMsg(&_cmNrt->err,kThreadFailApRC,"Thread pause failed.");
  276. dp->flags = cmClrFlag(dp->flags,kStartedApNrtFl);
  277. return kOkApRC;
  278. }
  279. bool cmApNrtDeviceIsStarted( unsigned devIdx )
  280. {
  281. assert( devIdx < _cmNrt->devCnt );
  282. const cmApNrtDev_t* dp = _cmApNrtIndexToDev(devIdx);
  283. return cmIsFlag(dp->flags,kStartedApNrtFl);
  284. }