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62 lines
1.4 KiB
Python
62 lines
1.4 KiB
Python
import sys
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import numpy as np
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sys.path.append("../..")
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from sdf import *
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from sharedconfig import *
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q15Type = CType(Q15)
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### The feature computed by the graph is one second of MFCCs.
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### So the nbMFCCOutputs is computed from this and with the additional
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### assumption that it must be even.
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### Because the MFCC slising window is sliding by half a second
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### each time (half number of MFCCs)
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src=WavSource("src",NBCHANNELS*AUDIO_INTERRUPT_LENGTH)
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src.addLiteralArg("test_stereo.wav")
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src.addLiteralArg(True)
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toMono=StereoToMono("toMono",q15Type,AUDIO_INTERRUPT_LENGTH)
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slidingAudio=SlidingBuffer("audioWin",q15Type,FFTSize,AudioOverlap)
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slidingMFCC=SlidingBuffer("mfccWin",q15Type,numOfDctOutputs*nbMFCCOutputs,numOfDctOutputs*nbMFCCOutputs>>1)
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mfcc=MFCC("mfcc",q15Type,FFTSize,numOfDctOutputs)
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mfcc.addVariableArg("mfccConfig")
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sink=NumpySink("sink",q15Type,nbMFCCOutputs * numOfDctOutputs)
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sink.addVariableArg("dispbuf")
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g = Graph()
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g.connect(src.o, toMono.i)
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g.connect(toMono.o, slidingAudio.i)
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g.connect(slidingAudio.o, mfcc.i)
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g.connect(mfcc.o,slidingMFCC.i)
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g.connect(slidingMFCC.o,sink.i)
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print("Generate graphviz and code")
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sched = g.computeSchedule()
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print("Schedule length = %d" % sched.scheduleLength)
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print("Memory usage %d bytes" % sched.memory)
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#
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conf=Configuration()
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conf.debugLimit=12
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conf.pyOptionalArgs="mfccConfig,dispbuf"
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sched.pythoncode(".",config=conf)
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with open("test.dot","w") as f:
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sched.graphviz(f)
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