pa_cpuload.h File Reference

Functions to assist in measuring the CPU utilization of a callback stream. Used to implement the Pa_GetStreamCpuLoad() function. More...

Go to the source code of this file.

Data Structures
struct	PaUtilCpuLoadMeasurer

Functions
void	PaUtil_InitializeCpuLoadMeasurer (PaUtilCpuLoadMeasurer *measurer, double sampleRate)
void	PaUtil_BeginCpuLoadMeasurement (PaUtilCpuLoadMeasurer *measurer)
void	PaUtil_EndCpuLoadMeasurement (PaUtilCpuLoadMeasurer *measurer, unsigned long framesProcessed)
void	PaUtil_ResetCpuLoadMeasurer (PaUtilCpuLoadMeasurer *measurer)
double	PaUtil_GetCpuLoad (PaUtilCpuLoadMeasurer *measurer)

Detailed Description

Functions to assist in measuring the CPU utilization of a callback stream. Used to implement the Pa_GetStreamCpuLoad() function.

Function Documentation

PaUtil_BeginCpuLoadMeasurement()

void PaUtil_BeginCpuLoadMeasurement

(

PaUtilCpuLoadMeasurer *

measurer

)

References PaUtilCpuLoadMeasurer::measurementStartTime, and PaUtil_GetTime().

Referenced by PaPulseAudio_WriteStreamBlock(), and ProcessingThreadProc().

PaUtil_EndCpuLoadMeasurement()

void PaUtil_EndCpuLoadMeasurement	(	PaUtilCpuLoadMeasurer *	measurer,
		unsigned long	framesProcessed )

FIXME

Todo

these coefficients shouldn't be hardwired see: http://www.portaudio.com/trac/ticket/113

References PaUtilCpuLoadMeasurer::averageLoad, LOWPASS_COEFFICIENT_0, LOWPASS_COEFFICIENT_1, PaUtilCpuLoadMeasurer::measurementStartTime, PaUtil_GetTime(), and PaUtilCpuLoadMeasurer::samplingPeriod.

Referenced by PaPulseAudio_WriteStreamBlock(), and ProcessingThreadProc().

PaUtil_GetCpuLoad()

double PaUtil_GetCpuLoad

(

PaUtilCpuLoadMeasurer *

measurer

)

References PaUtilCpuLoadMeasurer::averageLoad.

Referenced by GetStreamCpuLoad(), and ProcessingThreadProc().

PaUtil_InitializeCpuLoadMeasurer()

void PaUtil_InitializeCpuLoadMeasurer	(	PaUtilCpuLoadMeasurer *	measurer,
		double	sampleRate )

References PaUtilCpuLoadMeasurer::averageLoad, and PaUtilCpuLoadMeasurer::samplingPeriod.

Referenced by OpenStream().

PaUtil_ResetCpuLoadMeasurer()

void PaUtil_ResetCpuLoadMeasurer

(

PaUtilCpuLoadMeasurer *

measurer

)

References PaUtilCpuLoadMeasurer::averageLoad.

Referenced by ProcessingThreadProc().