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root / _song / song_segchroma.m
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function song = song_segchroma(song, param) |
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switch param.seg.type |
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case 'none' % no segmentation, segchroma equals syncchroma |
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song.segchroma = song.syncchroma; |
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otherwise |
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song = overlaychroma(song, param); |
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end |
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|
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function song = overlaychroma(song,param) |
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song.segchroma.treble = zeros(size(song.syncchroma.treble)); |
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song.segchroma.bass = zeros(size(song.syncchroma.bass)); |
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nPart = numel(song.parts); |
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for iPart = 1:nPart |
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song.parts(iPart).nInd = length(song.parts(iPart).indices); |
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for iOccur = 1:song.parts(iPart).nInd |
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iStartIndex = song.parts(iPart).indices(iOccur); |
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iEndIndex = iStartIndex + song.parts(iPart).n - 1; |
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for kOccur = 1:song.parts(iPart).nInd |
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kStartIndex = song.parts(iPart).indices(kOccur); |
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kEndIndex = kStartIndex + song.parts(iPart).n - 1; |
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song.segchroma.treble(iStartIndex:iEndIndex,:) = ... |
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song.segchroma.treble(iStartIndex:iEndIndex,:) + ... |
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song.syncchroma.treble(kStartIndex:kEndIndex,:); |
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song.segchroma.bass(iStartIndex:iEndIndex,:) = ... |
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song.segchroma.bass(iStartIndex:iEndIndex,:) + ... |
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song.syncchroma.bass(kStartIndex:kEndIndex,:); |
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end |
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end |
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end |
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song.segchroma.treble = qnormalise(song.segchroma.treble,inf,2); |
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song.segchroma.bass = qnormalise(song.segchroma.bass,inf,2); |