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cmRtSys.h : Added 'no-block-mode' to run a program independent of the audio

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clock. Added cmRtSysEnableNoBlockMode().
This commit is contained in:
kpl_harpo 2014-04-08 09:02:39 -04:00
parent 102725929c
commit 9f422e58e8
2 changed files with 66 additions and 18 deletions
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80
cmRtSys.c
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@ -51,6 +51,9 @@ typedef struct
kRtCmdId_t cmdId; // written by app thread, read by rt thread
unsigned cbEnableFl; // written by rt thread, read by app thread
bool noBlockEnaFl; //
unsigned noBlockSleepMs;
double* iMeterArray; //
double* oMeterArray; //
@ -295,8 +298,9 @@ void _cmRtDspExecCallback( _cmRtCfg_t* cp )
// 1) Buffers associated with disabled input/output channels will be set to NULL in iChArray[]/oChArray[].
// 2) Buffers associated with channels marked for pass-through will be set to NULL in oChArray[].
// 3) All samples returned in oChArray[] buffers will be set to zero.
cmApBufGetIO(cp->ss.args.inDevIdx, cp->ctx.iChArray, cp->ctx.iChCnt, &cp->ctx.iTimeStamp,
cp->ss.args.outDevIdx, cp->ctx.oChArray, cp->ctx.oChCnt, &cp->ctx.oTimeStamp );
if( cp->noBlockEnaFl == false )
cmApBufGetIO(cp->ss.args.inDevIdx, cp->ctx.iChArray, cp->ctx.iChCnt, &cp->ctx.iTimeStamp,
cp->ss.args.outDevIdx, cp->ctx.oChArray, cp->ctx.oChCnt, &cp->ctx.oTimeStamp );
// calling this function results in callbacks to _cmRtSysNetRecv()
@ -344,8 +348,11 @@ void _cmRtDspExecCallback( _cmRtCfg_t* cp )
}
// advance the audio buffer
cmApBufAdvance( cp->ss.args.outDevIdx, kOutApFl );
cmApBufAdvance( cp->ss.args.inDevIdx, kInApFl );
if( cp->noBlockEnaFl == false )
{
cmApBufAdvance( cp->ss.args.outDevIdx, kOutApFl );
cmApBufAdvance( cp->ss.args.inDevIdx, kInApFl );
}
// handle periodic status messages to the host
if( (cp->statusUpdateSmpIdx += cp->ss.args.dspFramesPerCycle) >= cp->statusUpdateSmpCnt )
@ -390,6 +397,7 @@ bool _cmRtThreadCallback(void* arg)
{
cmRtRC_t rc;
_cmRtCfg_t* cp = (_cmRtCfg_t*)arg;
bool noBlockFl = false;
// lock the cmRtSys mutex
if((rc = cmThreadMutexLock(cp->engMutexH)) != kOkRtRC )
@ -401,16 +409,22 @@ bool _cmRtThreadCallback(void* arg)
// runFl is always set except during finalization
while( cp->runFl )
{
// if the buffer is NOT ready or the cmRtSys is disabled
if(_cmRtBufIsReady(cp) == false || cp->cbEnableFl==false )
{
// block on the cond var and unlock the mutex
if( cmThreadMutexWaitOnCondVar(cp->engMutexH,false) != kOkRtRC )
if( noBlockFl )
cmSleepMs(cp->noBlockSleepMs);
else
{
cmThreadMutexUnlock(cp->engMutexH);
_cmRtError(cp->p,rc,"The cmRtSys cond. var. wait failed.");
return false;
if( cmThreadMutexWaitOnCondVar(cp->engMutexH,false) != kOkRtRC )
{
cmThreadMutexUnlock(cp->engMutexH);
_cmRtError(cp->p,rc,"The cmRtSys cond. var. wait failed.");
return false;
}
}
//
@ -418,13 +432,14 @@ bool _cmRtThreadCallback(void* arg)
//
++cp->status.wakeupCnt;
}
noBlockFl = cp->noBlockEnaFl;
// be sure we are still enabled and the buffer is still ready
while( cp->runFl && _cmRtBufIsReady(cp) )
{
++cp->status.audioCbCnt;
// make the cmRtSys callback
_cmRtDspExecCallback( cp );
@ -495,7 +510,6 @@ void _cmRtSysAudioUpdate( cmApAudioPacket_t* inPktArray, unsigned inPktCnt, cm
// transfer incoming/outgoing samples from/to the audio device
cmApBufUpdate(inPktArray,inPktCnt,outPktArray,outPktCnt);
// generate a test signal
//_cmRtGenSignal( cmApAudioPacket_t* outPktArray, unsigned outPktCnt, bool sineFl );
@ -513,6 +527,17 @@ void _cmRtSysAudioUpdate( cmApAudioPacket_t* inPktArray, unsigned inPktCnt, cm
_cmRtError(cp->p,kMutexErrRtRC,"CmRtSys signal cond. var. failed.");
}
if( cp->noBlockEnaFl )
{
cmApBufGetIO(cp->ss.args.inDevIdx, cp->ctx.iChArray, cp->ctx.iChCnt, &cp->ctx.iTimeStamp,
cp->ss.args.outDevIdx, cp->ctx.oChArray, cp->ctx.oChCnt, &cp->ctx.oTimeStamp );
cmApBufAdvance( cp->ss.args.outDevIdx, kOutApFl );
cmApBufAdvance( cp->ss.args.inDevIdx, kInApFl );
}
}
}
@ -895,14 +920,14 @@ cmRtRC_t cmRtSysCfg( cmRtSysH_t h, const cmRtSysSubSys_t* ss, unsigned rtSubIdx
cp->syncInputFl = true;
// setup the status record
cp->status.hdr.rtSubIdx = cp->ctx.rtSubIdx;
cp->status.iDevIdx = ss->args.inDevIdx;
cp->status.oDevIdx = ss->args.outDevIdx;
cp->status.iMeterCnt = cp->ctx.iChCnt;
cp->status.oMeterCnt = cp->ctx.oChCnt;
cp->iMeterArray = cmMemAllocZ( double, cp->status.iMeterCnt );
cp->oMeterArray = cmMemAllocZ( double, cp->status.oMeterCnt );
//cp->udpH = cfg->udpH;
cp->status.hdr.rtSubIdx = cp->ctx.rtSubIdx;
cp->status.iDevIdx = ss->args.inDevIdx;
cp->status.oDevIdx = ss->args.outDevIdx;
cp->status.iMeterCnt = cp->ctx.iChCnt;
cp->status.oMeterCnt = cp->ctx.oChCnt;
cp->iMeterArray = cmMemAllocZ( double, cp->status.iMeterCnt );
cp->oMeterArray = cmMemAllocZ( double, cp->status.oMeterCnt );
cp->noBlockEnaFl = false;
// create the real-time system thread
if((rc = cmThreadCreate( &cp->threadH, _cmRtThreadCallback, cp, ss->args.rpt )) != kOkThRC )
@ -1237,6 +1262,25 @@ cmRtSysCtx_t* cmRtSysContext( cmRtSysH_t h, unsigned rtSubIdx )
return &p->ssArray[rtSubIdx].ctx;
}
cmRtRC_t cmRtSysEnableNoBlockMode( cmRtSysH_t h, unsigned rtSubIdx, bool enaFl, unsigned noBlockSleepMs )
{
cmRt_t* p = _cmRtHandleToPtr(h);
cmRtRC_t rc = kOkRtRC;
if((rc = _cmRtSysVerifyInit(p,true)) != kOkRtRC )
return rc;
if( rtSubIdx >= p->ssCnt )
return cmErrMsg(&p->err,kInvalidArgRtRC,"Invalid 'rtSubIdx'. Enable non-block mode failed.");
p->ssArray[rtSubIdx].noBlockSleepMs = noBlockSleepMs;
p->ssArray[rtSubIdx].noBlockEnaFl = enaFl;
return kOkRtRC;
}
unsigned cmRtSysSubSystemCount( cmRtSysH_t h )
{
cmRt_t* p = _cmRtHandleToPtr(h);

4
cmRtSys.h
View File

@ -313,6 +313,10 @@ extern "C" {
// Return a pointer the context record associated with a sub-system
cmRtSysCtx_t* cmRtSysContext( cmRtSysH_t h, unsigned rtSubIdx );
// Enable non-block mode. In this mode audio I/O is disabled
// and the DSP callback is made every noBlockSleepMs milliseconds.
cmRtRC_t cmRtSysEnableNoBlockMode( cmRtSysH_t h, unsigned rtSubIdx, bool enaFl, unsigned noBlockSleepMs );
// Return the count of audio sub-systems.
// This is the same as the count of cfg recds passed to cmRtSystemInitialize().
unsigned cmRtSysSubSystemCount( cmRtSysH_t h );