| 1 | #!/usr/bin/python |
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| 2 | |
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| 3 | """ this file was written by Paul Brossier |
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| 4 | it is released under the GNU/GPL license. |
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| 5 | """ |
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| 6 | |
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| 7 | from aubio.aubioclass import * |
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| 8 | import sys |
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| 9 | |
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| 10 | bufsize = 1024 |
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| 11 | hopsize = bufsize/2 |
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| 12 | |
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| 13 | def getonsets(filein,threshold): |
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| 14 | frameread = 0 |
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| 15 | filei = sndfile(filein) |
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| 16 | srate = filei.samplerate() |
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| 17 | channels = filei.channels() |
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| 18 | myvec = fvec(hopsize,channels) |
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| 19 | readsize = filei.read(hopsize,myvec) |
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| 20 | opick = onsetpick(bufsize,hopsize,channels,myvec,threshold) |
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| 21 | #newname = "%s%.8f%s" % ("/tmp/",0.0000000,filein[-4:]) |
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| 22 | #fileo = sndfile(newname,model=filei) |
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| 23 | mylist = list() |
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| 24 | ovalist = [0., 0., 0., 0., 0., 0.] |
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| 25 | while(readsize==hopsize): |
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| 26 | readsize = filei.read(hopsize,myvec) |
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| 27 | isonset,val = opick.do(myvec) |
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| 28 | ovalist.append(val) |
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| 29 | ovalist.pop(0) |
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| 30 | if (isonset == 1): |
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| 31 | i=len(ovalist)-1 |
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| 32 | # find local minima |
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| 33 | while ovalist[i-1] < ovalist[i] and i > 0: |
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| 34 | i -= 1 |
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| 35 | now = (frameread+1-i)*hopsize/(srate+0.) |
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| 36 | mylist.append(now) |
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| 37 | frameread += 1 |
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| 38 | return mylist |
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| 39 | |
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| 40 | def cutfile(filein,onsets): |
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| 41 | frameread = 0 |
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| 42 | readsize = hopsize |
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| 43 | filei = sndfile(filein) |
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| 44 | srate = filei.samplerate() |
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| 45 | channels = filei.channels() |
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| 46 | newname = "%s%f%s" % ("/tmp/",0.0000000,filein[-4:]) |
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| 47 | fileo = sndfile(newname,model=filei) |
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| 48 | myvec = fvec(hopsize,channels) |
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| 49 | mycopy = fvec(hopsize,channels) |
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| 50 | while(readsize==hopsize): |
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| 51 | readsize = filei.read(hopsize,myvec) |
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| 52 | now = (frameread)*hopsize/(srate+0.) |
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| 53 | # write to current file |
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| 54 | if len(onsets) and now >= onsets[0]: |
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| 55 | onsets.pop(0) |
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| 56 | # write up to 1st zero crossing |
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| 57 | zerocross = 0 |
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| 58 | while ( abs( myvec.get(zerocross,0) ) > 0.002 ): |
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| 59 | zerocross += 1 |
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| 60 | writesize = fileo.write(zerocross,myvec) |
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| 61 | fromcross = 0 |
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| 62 | while (zerocross < readsize): |
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| 63 | mycopy.set(myvec.get(zerocross,0),fromcross,0) |
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| 64 | fromcross += 1 |
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| 65 | zerocross += 1 |
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| 66 | del fileo |
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| 67 | fileo = sndfile("%s%s%f%s%s" % |
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| 68 | (filein.split(".")[0].split("/")[-1],".",now,".",filein.split(".")[-1]),model=filei) |
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| 69 | # write after 1st zero crossing to new file |
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| 70 | writesize = fileo.write(fromcross,mycopy) |
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| 71 | else: |
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| 72 | writesize = fileo.write(readsize,myvec) |
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| 73 | frameread += 1 |
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| 74 | del fileo |
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| 75 | |
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| 76 | filename = sys.argv[1] |
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| 77 | threshold = sys.argv[2] |
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| 78 | onsets = getonsets(filename,threshold) |
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| 79 | cutfile(filename,onsets) |
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