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Bug837 Fix mismatch of spectrum display and vertical ruler...

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... It was caused by unnecessary rounding to integer for "minSamples" and
"maxSamples".

Which were also misleading variable names, so I changed them.  And took the
excuse to rename some other variables.
This commit is contained in:
Paul Licameli 2015-06-11 23:09:53 -04:00
parent c5f9d94a84
commit 4d2825e3d1
1 changed files with 36 additions and 39 deletions
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75
src/TrackArtist.cpp
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@ -1956,8 +1956,8 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
if (!image)return;
unsigned char *data = image->GetData();
int windowSize = GetSpectrumWindowSize(!autocorrelation);
const int half = windowSize / 2;
const int half = GetSpectrumWindowSize(!autocorrelation) / 2;
const double binUnit = rate / (2 * half);
const float *freq = 0;
const sampleCount *where = 0;
@ -1992,14 +1992,12 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
minFreq = 1.0;
}
// PRL: Must the following two be integers?
int minSamples = int((double)minFreq * (double)windowSize / rate + 0.5); // units are fft bins
int maxSamples = int((double)maxFreq * (double)windowSize / rate + 0.5);
float binPerPx = float(maxSamples - minSamples) / float(mid.height);
float minBin = ((double)minFreq / binUnit);
float maxBin = ((double)maxFreq / binUnit);
float binPerPx = float(maxBin - minBin) / float(mid.height);
const float
// e=exp(1.0f),
f = rate / 2.0f / half,
lmin = logf(float(minFreq)),
lmax = logf(float(maxFreq)),
scale = lmax - lmin;
@ -2081,28 +2079,28 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
#endif //EXPERIMENTAL_FFT_SKIP_POINTS
bin2f = 1.0f / f2bin,
minDistance = powf(2.0f, 2.0f / 12.0f),
i0 = expf(lmin) / f,
i1 = expf(scale + lmin) / f,
i0 = expf(lmin) / binUnit,
i1 = expf(scale + lmin) / binUnit,
minColor = 0.0f;
const int maxTableSize = 1024;
int *indexes = new int[maxTableSize];
#endif //EXPERIMENTAL_FIND_NOTES
for (int x = 0; x < mid.width; ++x)
for (int xx = 0; xx < mid.width; ++xx)
{
if (!logF) {
for (int yy = 0; yy < mid.height; yy++) {
float bin0 = float(yy) * binPerPx + minSamples;
float bin1 = float(yy + 1) * binPerPx + minSamples;
for (int yy = 0; yy < mid.height; ++yy) {
float bin0 = float(yy) * binPerPx + minBin;
float bin1 = float(yy + 1) * binPerPx + minBin;
const float value = findValue
(freq + half * x, bin0, bin1, half, autocorrelation, gain, range);
clip->mSpecPxCache->values[x * mid.height + yy] = value;
(freq + half * xx, bin0, bin1, half, autocorrelation, gain, range);
clip->mSpecPxCache->values[xx * mid.height + yy] = value;
}
}
else {
#ifdef EXPERIMENTAL_FIND_NOTES
int maximas=0;
const int x0 = half * x;
const int x0 = half * xx;
if (fftFindNotes) {
for (int i = maxTableSize-1; i >= 0; i--)
indexes[i]=-1;
@ -2164,10 +2162,10 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
bool inMaximum = false;
#endif //EXPERIMENTAL_FIND_NOTES
double yy2_base = exp(lmin) / f;
double yy2_base = exp(lmin) / binUnit;
float yy2 = yy2_base;
double exp_scale_per_height = exp(scale / mid.height);
for (int yy = 0; yy < mid.height; yy++) {
for (int yy = 0; yy < mid.height; ++yy) {
if (int(yy2) >= half)
yy2=half-1;
if (yy2<0)
@ -2209,41 +2207,40 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
#endif //EXPERIMENTAL_FIND_NOTES
{
value = findValue
(freq + half * x, bin0, bin1, half, autocorrelation, gain, range);
(freq + half * xx, bin0, bin1, half, autocorrelation, gain, range);
}
clip->mSpecPxCache->values[x * mid.height + yy] = value;
clip->mSpecPxCache->values[xx * mid.height + yy] = value;
yy2 = yy2_base;
} // each y
} // is logF
} // each x
} // each xx
} // updating cache
float selBinLo = freqLo * (double)windowSize / rate;
float selBinHi = freqHi * (double)windowSize / rate;
float selBinLo = freqLo / binUnit;
float selBinHi = freqHi / binUnit;
float selBinCenter =
((freqLo < 0 || freqHi < 0) ? -1 : sqrt(freqLo * freqHi))
* (double)windowSize / rate;
((freqLo < 0 || freqHi < 0) ? -1 : sqrt(freqLo * freqHi)) / binUnit;
sampleCount w1 = sampleCount(0.5 + rate *
t0
);
for (int x = 0; x < mid.width; ++x)
for (int xx = 0; xx < mid.width; ++xx)
{
sampleCount w0 = w1;
w1 = sampleCount(0.5 + rate *
(t0 + (x+1) * tstep)
(t0 + (xx+1) * tstep)
);
// TODO: The logF and non-logF case are very similar.
// They should be merged and simplified.
if (!logF)
{
for (int yy = 0; yy < mid.height; yy++) {
float bin0 = float (yy) * binPerPx + minSamples;
float bin1 = float (yy + 1) * binPerPx + minSamples;
for (int yy = 0; yy < mid.height; ++yy) {
float bin0 = float (yy) * binPerPx + minBin;
float bin1 = float (yy + 1) * binPerPx + minBin;
// For spectral selection, determine what colour
// set to use. We use a darker selection if
@ -2256,14 +2253,14 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
{
bool isSpectral = ((track->GetDisplay() == WaveTrack::SpectralSelectionDisplay) ||
(track->GetDisplay() == WaveTrack::SpectralSelectionLogDisplay));
selected = ChooseColorSet( bin0, bin1, selBinLo, selBinCenter, selBinHi, x/DASH_LENGTH, isSpectral );
selected = ChooseColorSet( bin0, bin1, selBinLo, selBinCenter, selBinHi, xx/DASH_LENGTH, isSpectral );
}
unsigned char rv, gv, bv;
const float value =
clip->mSpecPxCache->values[x * mid.height + yy];
clip->mSpecPxCache->values[xx * mid.height + yy];
GetColorGradient(value, selected, isGrayscale, &rv, &gv, &bv);
int px = ((mid.height - 1 - yy) * mid.width + x) * 3;
int px = ((mid.height - 1 - yy) * mid.width + xx) * 3;
data[px++] = rv;
data[px++] = gv;
data[px] = bv;
@ -2271,10 +2268,10 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
}
else //logF
{
double yy2_base=exp(lmin)/f;
double yy2_base=exp(lmin)/binUnit;
float yy2 = yy2_base;
double exp_scale_per_height = exp(scale/mid.height);
for (int yy = 0; yy < mid.height; yy++) {
for (int yy = 0; yy < mid.height; ++yy) {
if (int(yy2)>=half)
yy2=half-1;
if (yy2<0)
@ -2295,10 +2292,10 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
{
bool isSpectral = ((track->GetDisplay() == WaveTrack::SpectralSelectionDisplay) ||
(track->GetDisplay() == WaveTrack::SpectralSelectionLogDisplay));
selected = ChooseColorSet( bin0, bin1, selBinLo, selBinCenter, selBinHi, x/DASH_LENGTH, isSpectral );
selected = ChooseColorSet( bin0, bin1, selBinLo, selBinCenter, selBinHi, xx/DASH_LENGTH, isSpectral );
}
const float value = clip->mSpecPxCache->values[x * mid.height + yy];
const float value = clip->mSpecPxCache->values[xx * mid.height + yy];
yy2 = yy2_base;
unsigned char rv, gv, bv;
@ -2312,13 +2309,13 @@ void TrackArtist::DrawClipSpectrum(WaveTrackCache &cache,
}
#endif //EXPERIMENTAL_FFT_Y_GRID
int px = ((mid.height - 1 - yy) * mid.width + x) * 3;
int px = ((mid.height - 1 - yy) * mid.width + xx) * 3;
data[px++] = rv;
data[px++] = gv;
data[px] = bv;
} // each y
} // logF
} // each x
} // each xx
// If we get to this point, the clip is actually visible on the
// screen, so remember the display rectangle.