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fix for server timer

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This commit is contained in:
Volker Fischer 2009-08-11 13:13:48 +00:00
parent 84f0a31a20
commit 6bed7abc8d
1 changed files with 14 additions and 26 deletions
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40
src/server.cpp
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@ -29,9 +29,9 @@
CHighPrecisionTimer::CHighPrecisionTimer() CHighPrecisionTimer::CHighPrecisionTimer()
{ {
// add some error checking, the high precision timer implementation only // add some error checking, the high precision timer implementation only
// supports 128 and 256 samples frame size at 48 kHz sampling rate // supports 128 samples frame size at 48 kHz sampling rate
#if ( ( SYSTEM_BLOCK_FRAME_SAMPLES != 128 ) && ( SYSTEM_BLOCK_FRAME_SAMPLES != 256 ) ) #if ( SYSTEM_BLOCK_FRAME_SAMPLES != 128 )
# error "Only system frame sizes of 128 and 256 samples are supported by this module" # error "Only system frame size of 128 samples is supported by this module"
#endif #endif
#if SYSTEM_SAMPLE_RATE != 48000 #if SYSTEM_SAMPLE_RATE != 48000
# error "Only a system sample rate of 48 kHz is supported by this module" # error "Only a system sample rate of 48 kHz is supported by this module"
@ -39,30 +39,18 @@ CHighPrecisionTimer::CHighPrecisionTimer()
// Since QT only supports a minimum timer resolution of 1 ms but for our // Since QT only supports a minimum timer resolution of 1 ms but for our
// llcon server we require a timer interval of 2.333 ms for 128 samples // llcon server we require a timer interval of 2.333 ms for 128 samples
// frame size and 5.666 ms for 256 samples frame size at 48 kHz sampling // frame size at 48 kHz sampling rate.
// rate. // To support this interval, we use a timer with 2 ms
// To support this interval, we use a timer at the minimum supported
// resolution and fire the actual frame timer if the error to the actual // resolution and fire the actual frame timer if the error to the actual
// required interval is minimum. // required interval is minimum.
veciTimeOutIntervals.Init ( 3 ); veciTimeOutIntervals.Init ( 3 );
if ( SYSTEM_BLOCK_FRAME_SAMPLES == 128 )
{ // for 128 sample frame size at 48 kHz sampling rate:
// for 128 sample frame size at 48 kHz sampling rate: // actual intervals: 0.0 2.666 5.333 8.0
// actual intervals: 0.0 2.666 5.333 8.0 // quantized to 2 ms: 0 2 6 8 (0)
// quantized to 1 ms: 0 3 5 8 (0) veciTimeOutIntervals[0] = 0;
veciTimeOutIntervals[0] = 3; veciTimeOutIntervals[1] = 1;
veciTimeOutIntervals[1] = 2; veciTimeOutIntervals[2] = 0;
veciTimeOutIntervals[2] = 3;
}
else
{
// for 256 sample frame size at 48 kHz sampling rate:
// actual intervals: 0.0 5.333 10.666 16.0
// quantized to 1 ms: 0 5 11 16 (0)
veciTimeOutIntervals[0] = 5;
veciTimeOutIntervals[1] = 6;
veciTimeOutIntervals[2] = 5;
}
// connect timer timeout signal // connect timer timeout signal
QObject::connect ( &Timer, SIGNAL ( timeout() ), QObject::connect ( &Timer, SIGNAL ( timeout() ),
@ -75,8 +63,8 @@ void CHighPrecisionTimer::start()
iCurPosInVector = 0; iCurPosInVector = 0;
iIntervalCounter = 0; iIntervalCounter = 0;
// start internal timer with lowest possible resolution // start internal timer with 2 ms resolution
Timer.start ( MIN_TIMER_RESOLUTION_MS ); Timer.start ( 2 );
} }
void CHighPrecisionTimer::stop() void CHighPrecisionTimer::stop()