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annotate src/portaudio/test/patest_suggested_vs_streaminfo_latency.py @ 105:c83a7e2af39c

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Ranlib
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 25 Mar 2013 16:28:19 +0000
parents 8a15ff55d9af
children
rev   line source
cannam@89 1 #!/usr/bin/env python
cannam@89 2 """
cannam@89 3
cannam@89 4 Run and graph the results of patest_suggested_vs_streaminfo_latency.c
cannam@89 5
cannam@89 6 Requires matplotlib for plotting: http://matplotlib.sourceforge.net/
cannam@89 7
cannam@89 8 """
cannam@89 9 import os
cannam@89 10 from pylab import *
cannam@89 11 import numpy
cannam@89 12 from matplotlib.backends.backend_pdf import PdfPages
cannam@89 13
cannam@89 14 testExeName = "PATest.exe" # rename to whatever the compiled patest_suggested_vs_streaminfo_latency.c binary is
cannam@89 15 dataFileName = "patest_suggested_vs_streaminfo_latency.csv" # code below calls the exe to generate this file
cannam@89 16
cannam@89 17 inputDeviceIndex = -1 # -1 means default
cannam@89 18 outputDeviceIndex = -1 # -1 means default
cannam@89 19 sampleRate = 44100
cannam@89 20 pdfFilenameSuffix = "_wmme"
cannam@89 21
cannam@89 22 pdfFile = PdfPages("patest_suggested_vs_streaminfo_latency_" + str(sampleRate) + pdfFilenameSuffix +".pdf") #output this pdf file
cannam@89 23
cannam@89 24
cannam@89 25 def loadCsvData( dataFileName ):
cannam@89 26 params= ""
cannam@89 27 inputDevice = ""
cannam@89 28 outputDevice = ""
cannam@89 29
cannam@89 30 startLines = file(dataFileName).readlines(1024)
cannam@89 31 for line in startLines:
cannam@89 32 if "output device" in line:
cannam@89 33 outputDevice = line.strip(" \t\n\r#")
cannam@89 34 if "input device" in line:
cannam@89 35 inputDevice = line.strip(" \t\n\r#")
cannam@89 36 params = startLines[0].strip(" \t\n\r#")
cannam@89 37
cannam@89 38 data = numpy.loadtxt(dataFileName, delimiter=",", skiprows=4).transpose()
cannam@89 39
cannam@89 40 class R(object): pass
cannam@89 41 result = R()
cannam@89 42 result.params = params
cannam@89 43 for s in params.split(','):
cannam@89 44 if "sample rate" in s:
cannam@89 45 result.sampleRate = s
cannam@89 46
cannam@89 47 result.inputDevice = inputDevice
cannam@89 48 result.outputDevice = outputDevice
cannam@89 49 result.suggestedLatency = data[0]
cannam@89 50 result.halfDuplexOutputLatency = data[1]
cannam@89 51 result.halfDuplexInputLatency = data[2]
cannam@89 52 result.fullDuplexOutputLatency = data[3]
cannam@89 53 result.fullDuplexInputLatency = data[4]
cannam@89 54 return result;
cannam@89 55
cannam@89 56
cannam@89 57 def setFigureTitleAndAxisLabels( framesPerBufferString ):
cannam@89 58 title("PortAudio suggested (requested) vs. resulting (reported) stream latency\n" + framesPerBufferString)
cannam@89 59 ylabel("PaStreamInfo::{input,output}Latency (s)")
cannam@89 60 xlabel("Pa_OpenStream suggestedLatency (s)")
cannam@89 61 grid(True)
cannam@89 62 legend(loc="upper left")
cannam@89 63
cannam@89 64 def setDisplayRangeSeconds( maxSeconds ):
cannam@89 65 xlim(0, maxSeconds)
cannam@89 66 ylim(0, maxSeconds)
cannam@89 67
cannam@89 68
cannam@89 69 # run the test with different frames per buffer values:
cannam@89 70
cannam@89 71 compositeTestFramesPerBufferValues = [0]
cannam@89 72 # powers of two
cannam@89 73 for i in range (1,11):
cannam@89 74 compositeTestFramesPerBufferValues.append( pow(2,i) )
cannam@89 75
cannam@89 76 # multiples of 50
cannam@89 77 for i in range (1,20):
cannam@89 78 compositeTestFramesPerBufferValues.append( i * 50 )
cannam@89 79
cannam@89 80 # 10ms buffer sizes
cannam@89 81 compositeTestFramesPerBufferValues.append( 441 )
cannam@89 82 compositeTestFramesPerBufferValues.append( 882 )
cannam@89 83
cannam@89 84 # large primes
cannam@89 85 #compositeTestFramesPerBufferValues.append( 39209 )
cannam@89 86 #compositeTestFramesPerBufferValues.append( 37537 )
cannam@89 87 #compositeTestFramesPerBufferValues.append( 26437 )
cannam@89 88
cannam@89 89 individualPlotFramesPerBufferValues = [0,64,128,256,512] #output separate plots for these
cannam@89 90
cannam@89 91 isFirst = True
cannam@89 92
cannam@89 93 for framesPerBuffer in compositeTestFramesPerBufferValues:
cannam@89 94 commandString = testExeName + " " + str(inputDeviceIndex) + " " + str(outputDeviceIndex) + " " + str(sampleRate) + " " + str(framesPerBuffer) + ' > ' + dataFileName
cannam@89 95 print commandString
cannam@89 96 os.system(commandString)
cannam@89 97
cannam@89 98 d = loadCsvData(dataFileName)
cannam@89 99
cannam@89 100 if isFirst:
cannam@89 101 figure(1) # title sheet
cannam@89 102 gcf().text(0.1, 0.0,
cannam@89 103 "patest_suggested_vs_streaminfo_latency\n%s\n%s\n%s\n"%(d.inputDevice,d.outputDevice,d.sampleRate))
cannam@89 104 pdfFile.savefig()
cannam@89 105
cannam@89 106
cannam@89 107 figure(2) # composite plot, includes all compositeTestFramesPerBufferValues
cannam@89 108
cannam@89 109 if isFirst:
cannam@89 110 plot( d.suggestedLatency, d.suggestedLatency, label="Suggested latency" )
cannam@89 111
cannam@89 112 plot( d.suggestedLatency, d.halfDuplexOutputLatency )
cannam@89 113 plot( d.suggestedLatency, d.halfDuplexInputLatency )
cannam@89 114 plot( d.suggestedLatency, d.fullDuplexOutputLatency )
cannam@89 115 plot( d.suggestedLatency, d.fullDuplexInputLatency )
cannam@89 116
cannam@89 117 if framesPerBuffer in individualPlotFramesPerBufferValues: # individual plots
cannam@89 118 figure( 3 + individualPlotFramesPerBufferValues.index(framesPerBuffer) )
cannam@89 119
cannam@89 120 plot( d.suggestedLatency, d.suggestedLatency, label="Suggested latency" )
cannam@89 121 plot( d.suggestedLatency, d.halfDuplexOutputLatency, label="Half-duplex output latency" )
cannam@89 122 plot( d.suggestedLatency, d.halfDuplexInputLatency, label="Half-duplex input latency" )
cannam@89 123 plot( d.suggestedLatency, d.fullDuplexOutputLatency, label="Full-duplex output latency" )
cannam@89 124 plot( d.suggestedLatency, d.fullDuplexInputLatency, label="Full-duplex input latency" )
cannam@89 125
cannam@89 126 if framesPerBuffer == 0:
cannam@89 127 framesPerBufferText = "paFramesPerBufferUnspecified"
cannam@89 128 else:
cannam@89 129 framesPerBufferText = str(framesPerBuffer)
cannam@89 130 setFigureTitleAndAxisLabels( "user frames per buffer: "+str(framesPerBufferText) )
cannam@89 131 setDisplayRangeSeconds(2.2)
cannam@89 132 pdfFile.savefig()
cannam@89 133 setDisplayRangeSeconds(0.1)
cannam@89 134 setFigureTitleAndAxisLabels( "user frames per buffer: "+str(framesPerBufferText)+" (detail)" )
cannam@89 135 pdfFile.savefig()
cannam@89 136
cannam@89 137 isFirst = False
cannam@89 138
cannam@89 139 figure(2)
cannam@89 140 setFigureTitleAndAxisLabels( "composite of frames per buffer values:\n"+str(compositeTestFramesPerBufferValues) )
cannam@89 141 setDisplayRangeSeconds(2.2)
cannam@89 142 pdfFile.savefig()
cannam@89 143 setDisplayRangeSeconds(0.1)
cannam@89 144 setFigureTitleAndAxisLabels( "composite of frames per buffer values:\n"+str(compositeTestFramesPerBufferValues)+" (detail)" )
cannam@89 145 pdfFile.savefig()
cannam@89 146
cannam@89 147 pdfFile.close()
cannam@89 148
cannam@89 149 #uncomment this to display interactively, otherwise we just output a pdf
cannam@89 150 #show()