int CsoundPerformanceThread::Perform()
{
int retval = 0;
do {
while (firstMessage) {
csoundLockMutex(queueLock);
do {
CsoundPerformanceThreadMessage *msg;
// get oldest message
msg = (CsoundPerformanceThreadMessage*) firstMessage;
if (!msg)
break;
// unlink from FIFO
firstMessage = msg->nxt;
if (!msg->nxt)
lastMessage = (CsoundPerformanceThreadMessage*) 0;
// process and destroy message
retval = msg->run();
delete msg;
} while (!retval);
if (paused)
csoundWaitThreadLock(pauseLock, (size_t) 0);
// mark queue as empty
csoundNotifyThreadLock(flushLock);
csoundUnlockMutex(queueLock);
// if error or end of score, return now
if (retval)
goto endOfPerf;
// if paused, wait until a new message is received, then loop back
if (!paused)
break;
// VL: if this is paused, then it will double lock.
csoundWaitThreadLockNoTimeout(pauseLock);
csoundNotifyThreadLock(pauseLock);
}
if(processcallback != NULL)
processcallback(cdata);
retval = csoundPerformKsmps(csound);
} while (!retval);
endOfPerf:
status = retval;
csoundCleanup(csound);
// delete any pending messages
csoundLockMutex(queueLock);
{
CsoundPerformanceThreadMessage *msg;
msg = (CsoundPerformanceThreadMessage*) firstMessage;
firstMessage = (CsoundPerformanceThreadMessage*) 0;
lastMessage = (CsoundPerformanceThreadMessage*) 0;
while (msg) {
CsoundPerformanceThreadMessage *nxt = msg->nxt;
delete msg;
msg = nxt;
}
}
csoundNotifyThreadLock(flushLock);
csoundUnlockMutex(queueLock);
running = 1;
return retval;
}
void CsoundPerformanceThread::QueueMessage(CsoundPerformanceThreadMessage *msg)
{
if (status) {
delete msg;
return;
}
csoundLockMutex(queueLock);
// link message into FIFO
if (!lastMessage)
firstMessage = msg;
else
lastMessage->nxt = msg;
lastMessage = msg;
// mark queue as non-empty
csoundWaitThreadLock(flushLock, (size_t) 0);
// wake up from pause
csoundNotifyThreadLock(pauseLock);
csoundUnlockMutex(queueLock);
}
int CsoundPerformanceThread::Perform()
{
int retval = 0;
do {
while (firstMessage) {
csoundLockMutex(queueLock);
do {
CsoundPerformanceThreadMessage *msg;
// get oldest message
msg = (CsoundPerformanceThreadMessage*) firstMessage;
if (!msg)
break;
// unlink from FIFO
firstMessage = msg->nxt;
if (!msg->nxt)
lastMessage = (CsoundPerformanceThreadMessage*) 0;
// process and destroy message
retval = msg->run();
delete msg; // TODO: This should be moved out of the Perform function
} while (!retval);
if (paused)
csoundWaitThreadLock(pauseLock, (size_t) 0);
// mark queue as empty
csoundNotifyThreadLock(flushLock);
csoundUnlockMutex(queueLock);
// if error or end of score, return now
if (retval)
goto endOfPerf;
// if paused, wait until a new message is received, then loop back
if (!paused)
break;
// VL: if this is paused, then it will double lock.
csoundWaitThreadLockNoTimeout(pauseLock);
csoundNotifyThreadLock(pauseLock);
}
if(processcallback != NULL)
processcallback(cdata);
retval = csoundPerformKsmps(csound);
if (recordData.running) {
MYFLT *spout = csoundGetSpout(csound);
int len = csoundGetKsmps(csound) * csoundGetNchnls(csound);
if (csoundGet0dBFS(csound) != 1.0) {
MYFLT zdbfs = csoundGet0dBFS(csound);
MYFLT *modspout = spout;
for (int i = 0; i < len; i++) {
*modspout /= zdbfs;
modspout++;
}
}
int written = csoundWriteCircularBuffer(NULL, recordData.cbuf, spout, len);
if (written != len) {
csoundMessage(csound, "perfThread record buffer overrun.");
}
}
pthread_cond_signal(&recordData.condvar); // Needs to be outside the if for the case where stop record was requested
} while (!retval);
endOfPerf:
status = retval;
csoundCleanup(csound);
// delete any pending messages
csoundLockMutex(queueLock);
{
CsoundPerformanceThreadMessage *msg;
msg = (CsoundPerformanceThreadMessage*) firstMessage;
firstMessage = (CsoundPerformanceThreadMessage*) 0;
lastMessage = (CsoundPerformanceThreadMessage*) 0;
while (msg) {
CsoundPerformanceThreadMessage *nxt = msg->nxt;
delete msg;
msg = nxt;
}
}
csoundNotifyThreadLock(flushLock);
csoundUnlockMutex(queueLock);
running = 1;
return retval;
}