88 lines
2.2 KiB
Python
88 lines
2.2 KiB
Python
##| Copyright: (C) 2019-2020 Kevin Larke <contact AT larke DOT org>
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##| License: GNU GPL version 3.0 or above. See the accompanying LICENSE file.
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import sys,os
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import numpy as np
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import common
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import rms_analysis
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def fit_points_to_reference( usL, dbL, usRefL, dbRefL ):
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dbV = None
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yyL = [ (db,dbRefL[ usRefL.index(us)]) for i,(us,db) in enumerate(zip(usL,dbL)) if us in usRefL ]
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if len(yyL) < 10:
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print("NO FIT")
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else:
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y0L,yrL = zip(*yyL)
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yN = len(y0L)
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A = np.vstack([np.ones(yN),y0L]).T
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c,m = np.linalg.lstsq(A,yrL,rcond=None)[0]
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dbV = (np.array(dbL) * m) + c
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return dbV
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def find_elbow( usL, dbL, pointsPerLine=5 ):
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ppl_2 = int(pointsPerLine/2)
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dL = []
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i = pointsPerLine
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# for each consecutive set of 'pointsPerLine' points in usL and dbL
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while i < len(usL):
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# find the x,y coordinates of the first 'ppl_2' coordinates
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x0L = np.array([ (us,1.0) for us in usL[i-pointsPerLine:i-ppl_2] ])
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y0L = np.array(usL[i-pointsPerLine:i-ppl_2])
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# find the x,y coordinates of the second 'ppl_2' coordinates
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x1L = np.array([ (us,1.0) for us in usL[i-ppl_2:i]])
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y1L = np.array(dbL[i-ppl_2:i])
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m0,c0 = np.linalg.lstsq(x0L,y0L,rcond=None)[0] # fit a line through the first set of points
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m1,c1 = np.linalg.lstsq(x1L,y1L,rcond=None)[0] # fit a line through the second set of points
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# store the angle between the two lines
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dL.append(m1-m0)
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i += 1
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# find the max angle
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i = np.argmax( dL )
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# return the x,y coordinate of the first data point of the second line
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return (usL[i+ppl_2],dbL[i+ppl_2])
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def find_elbow_main( cfg, inDir, midi_pitch, takeId ):
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inDir = os.path.join(inDir,str(pitch),str(takeId))
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analysisArgsD = cfg.analysisArgs['rmsAnalysArgs']
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r = rms_analysis_main( inDir, int(midi_pitch), **analysisD )
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usL = r.pkUsL
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dbL = r.pkDbL
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return find_elbow(r.pkUsL,r.pkDbL)
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if __name__ == "__main__":
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inDir = sys.argv[1]
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cfgFn = sys.argv[2]
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pitch = sys.argv[3]
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cfg = common.parse_yaml_cfg(cfgFn)
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find_elbow( cfg, inDir, pitch, 0 )
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