view yeti/test_frequency.yeti @ 75:f4fb0ac6120a

Interpolation for CQ. But this is wrong, it is interpolating between points in the nearest full-height columns even where there is a nearer point in the not-full-height ones

/*
    Constant-Q library
    Copyright (c) 2013-2014 Queen Mary, University of London

    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation
    files (the "Software"), to deal in the Software without
    restriction, including without limitation the rights to use, copy,
    modify, merge, publish, distribute, sublicense, and/or sell copies
    of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    Except as contained in this notice, the names of the Centre for
    Digital Music; Queen Mary, University of London; and Chris Cannam
    shall not be used in advertising or otherwise to promote the sale,
    use or other dealings in this Software without prior written
    authorization.
*/

module test_frequency;

mat = load may.matrix;
vec = load may.vector;
win = load may.signal.window;
mm = load may.mathmisc;
cm = load may.matrix.complex;
syn = load may.stream.syntheticstream;
plot = load may.plot;

{ cqt } = load cqt;

// Test with a single windowed sinusoid, repeating at various frequencies

sinTestStream sampleRate duration signalFreq = // duration is in samples
   (sin = syn.sinusoid sampleRate signalFreq;
    chunk = mat.getRow 0 (sin.read duration);
    syn.precalculatedMono sampleRate (win.windowed win.hann chunk));

// We want to make a CQ transform spanning more than one octave, but
// not going all the way to fs/2 so we can test it also with
// frequencies above and below its extents

sampleRate = 100;

// fs/2 = 50 so 10->40 gives us 2 octaves
cqmin = 10;
cqmax = 40;
bpo = 4; // fairly arbitrary

testFreqs = map (* 5) [ 0..10 ];
duration = sampleRate * 2;

threshold = 0.08;

streamBuilder = sinTestStream sampleRate duration;

binForFreq f =
    mm.round (bpo * mm.log2 (f / cqmin)) - 1;

report message matrix =
   (eprintln message;
    eprintln "matrix is:";
    mat.eprint matrix;
    chart = plot.plot [Grid matrix];
    sleep 100;
    chart#dispose());

tests = mapIntoHash
    do f: "freq_\(f)" done
    do f: \(
        str = streamBuilder f;
        cq = cqt { maxFreq = cqmax, minFreq = cqmin, binsPerOctave = bpo } str;
        out = case cq.output (ComplexCQ ()) of
            Complex c: c;
            _: failWith "expected complex";
        esac;
        m = mat.concatHorizontal (map cm.magnitudes out);
//    println "binFrequencies = \(cq.kernel.binFrequencies)";
//    println "binForFreq \(f) = \(binForFreq f)";
        var colno = 0;
        success = all id
           (map do c:
                // The test passes for this column if:
                //
                //  * the max bin is the expected one, or
                //
                //  * the expected max is out of range entirely (but
                //  we need to test _something_ in this case --
                //  what?), or
                //
                //  * all bins are below a threshold, or
                //
                //  * this is an odd column and the expected max is in
                //  the lower octave
                //
                // We should also check that all values in the lower
                // octave are zero for odd columns.
                //
                expected = binForFreq f;
                good =
                   (expected < 0 or expected >= vec.length c) or
                   ((colno % 2 == 1) and expected < (vec.length c / 2)) or
                   (vec.max c < threshold) or
                   (vec.maxindex c == binForFreq f);
                if (not good) then
                    report " * bad! maxindex \(vec.maxindex c) != expected \(binForFreq f) for freq \(f) in column \(colno) of \(mat.width m): column is \(vec.list c)" m;
                fi;
                colno := colno + 1;
                good;
            done (mat.asColumns m));
        success;
    ) done
    testFreqs;

tests is hash<string, () -> boolean>