major engine cleanup. dependency on baselib removed. engine is now C code (not ansi tho). some other cruft removed aswell

1 files changed, 105 insertions, 0 deletions

diff --git a/src/engine/external/portaudio/pa_cpuload.c b/src/engine/external/portaudio/pa_cpuload.c
new file mode 100644
index 00000000..cc4fad77
--- /dev/null
+++ b/src/engine/external/portaudio/pa_cpuload.c
@@ -0,0 +1,105 @@
+/*

+ * $Id: pa_cpuload.c 1097 2006-08-26 08:27:53Z rossb $

+ * Portable Audio I/O Library CPU Load measurement functions

+ * Portable CPU load measurement facility.

+ *

+ * Based on the Open Source API proposed by Ross Bencina

+ * Copyright (c) 2002 Ross Bencina

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining

+ * a copy of this software and associated documentation files

+ * (the "Software"), to deal in the Software without restriction,

+ * including without limitation the rights to use, copy, modify, merge,

+ * publish, distribute, sublicense, and/or sell copies of the Software,

+ * and to permit persons to whom the Software is furnished to do so,

+ * subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be

+ * included in all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR

+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF

+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ */

+

+/*

+ * The text above constitutes the entire PortAudio license; however, 

+ * the PortAudio community also makes the following non-binding requests:

+ *

+ * Any person wishing to distribute modifications to the Software is

+ * requested to send the modifications to the original developer so that

+ * they can be incorporated into the canonical version. It is also 

+ * requested that these non-binding requests be included along with the 

+ * license above.

+ */

+

+/** @file

+ @ingroup common_src

+

+ @brief Functions to assist in measuring the CPU utilization of a callback

+ stream. Used to implement the Pa_GetStreamCpuLoad() function.

+

+ @todo Dynamically calculate the coefficients used to smooth the CPU Load

+ Measurements over time to provide a uniform characterisation of CPU Load

+ independent of rate at which PaUtil_BeginCpuLoadMeasurement /

+ PaUtil_EndCpuLoadMeasurement are called.

+*/

+

+

+#include "pa_cpuload.h"

+

+#include <assert.h>

+

+#include "pa_util.h"   /* for PaUtil_GetTime() */

+

+

+void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate )

+{

+    assert( sampleRate > 0 );

+

+    measurer->samplingPeriod = 1. / sampleRate;

+    measurer->averageLoad = 0.;

+}

+

+void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer )

+{

+    measurer->averageLoad = 0.;

+}

+

+void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer )

+{

+    measurer->measurementStartTime = PaUtil_GetTime();

+}

+

+

+void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed )

+{

+    double measurementEndTime, secondsFor100Percent, measuredLoad;

+

+    if( framesProcessed > 0 ){

+        measurementEndTime = PaUtil_GetTime();

+

+        assert( framesProcessed > 0 );

+        secondsFor100Percent = framesProcessed * measurer->samplingPeriod;

+

+        measuredLoad = (measurementEndTime - measurer->measurementStartTime) / secondsFor100Percent;

+

+        /* Low pass filter the calculated CPU load to reduce jitter using a simple IIR low pass filter. */

+        /** FIXME @todo these coefficients shouldn't be hardwired */

+#define LOWPASS_COEFFICIENT_0   (0.9)

+#define LOWPASS_COEFFICIENT_1   (0.99999 - LOWPASS_COEFFICIENT_0)

+

+        measurer->averageLoad = (LOWPASS_COEFFICIENT_0 * measurer->averageLoad) +

+                               (LOWPASS_COEFFICIENT_1 * measuredLoad);

+    }

+}

+

+

+double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer )

+{

+    return measurer->averageLoad;

+}