mirror/lmms
1
0
Fork 0
mirror of https://github.com/LMMS/lmms.git synced 2026-04-16 12:07:26 -04:00
Code Issues Packages Projects Releases Wiki Activity

Spectrum analyzer update (#5160)

Browse Source 
* advanced config: expose hidden constants to user screen
* advanced config: add support for FFT window overlapping
* waterfall: display at native resolution on high-DPI screens
* waterfall: add cursor and improve label density
* FFT: fix normalization so that 0 dBFS matches full-scale sinewave
* FFT: decouple data acquisition from processing and display
* FFT: separate lock for reallocation (to avoid some needless waiting)
* moved ranges and other constants to a separate file
* debug: better performance measurements
* minor fixes
* build the ringbuffer library as part of LMMS core
This commit is contained in:
Martin Pavelek
2019-11-21 14:44:18 +01:00
committed by Johannes Lorenz
parent 2f0010270e
commit da73ddd242
26 changed files with 1867 additions and 364 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
plugins/SpectrumAnalyzer/SaControls.cpp
View File

@@ -50,7 +50,17 @@ SaControls::SaControls(Analyzer *effect) :
m_freqRangeModel(this, tr("Frequency range")),
m_ampRangeModel(this, tr("Amplitude range")),
m_blockSizeModel(this, tr("FFT block size")),
m_windowModel(this, tr("FFT window type"))
m_windowModel(this, tr("FFT window type")),
// Advanced settings knobs
m_envelopeResolutionModel(0.25f, 0.1f, 3.0f, 0.05f, this, tr("Peak envelope resolution")),
m_spectrumResolutionModel(1.5f, 0.1f, 3.0f, 0.05f, this, tr("Spectrum display resolution")),
m_peakDecayFactorModel(0.992f, 0.95f, 0.999f, 0.001f, this, tr("Peak decay multiplier")),
m_averagingWeightModel(0.15f, 0.01f, 0.5f, 0.01f, this, tr("Averaging weight")),
m_waterfallHeightModel(300.0f, 50.0f, 1000.0f, 50.0f, this, tr("Waterfall history size")),
m_waterfallGammaModel(0.30f, 0.10f, 1.00f, 0.05f, this, tr("Waterfall gamma correction")),
m_windowOverlapModel(2.0f, 1.0f, 4.0f, 1.0f, this, tr("FFT window overlap")),
m_zeroPaddingModel(2.0f, 0.0f, 4.0f, 1.0f, this, tr("FFT zero padding"))
{
// Frequency and amplitude ranges; order must match
// FREQUENCY_RANGES and AMPLITUDE_RANGES defined in SaControls.h
@@ -62,10 +72,10 @@ SaControls::SaControls(Analyzer *effect) :
m_freqRangeModel.setValue(m_freqRangeModel.findText(tr("Full (auto)")));
m_ampRangeModel.addItem(tr("Extended"));
m_ampRangeModel.addItem(tr("Default"));
m_ampRangeModel.addItem(tr("Audible"));
m_ampRangeModel.addItem(tr("Noise"));
m_ampRangeModel.setValue(m_ampRangeModel.findText(tr("Default")));
m_ampRangeModel.addItem(tr("Loud"));
m_ampRangeModel.addItem(tr("Silent"));
m_ampRangeModel.setValue(m_ampRangeModel.findText(tr("Audible")));
// FFT block size labels are generated automatically, based on
// FFT_BLOCK_SIZES vector defined in fft_helpers.h
@@ -95,12 +105,15 @@ SaControls::SaControls(Analyzer *effect) :
// Colors
// Background color is defined by Qt / theme.
// Make sure the sum of colors for L and R channel stays lower or equal
// to 255. Otherwise the Waterfall pixels may overflow back to 0 even when
// the input signal isn't clipping (over 1.0).
// Make sure the sum of colors for L and R channel results into a neutral
// color that has at least one component equal to 255 (i.e. ideally white).
// This means the color overflows to zero exactly when signal reaches
// clipping threshold, indicating the problematic frequency to user.
// Mono waterfall color should have similarly at least one component at 255.
m_colorL = QColor(51, 148, 204, 135);
m_colorR = QColor(204, 107, 51, 135);
m_colorMono = QColor(51, 148, 204, 204);
m_colorMonoW = QColor(64, 185, 255, 255);
m_colorBG = QColor(7, 7, 7, 255); // ~20 % gray (after gamma correction)
m_colorGrid = QColor(30, 34, 38, 255); // ~40 % gray (slightly cold / blue)
m_colorLabels = QColor(192, 202, 212, 255); // ~90 % gray (slightly cold / blue)
@@ -126,6 +139,15 @@ void SaControls::loadSettings(const QDomElement &_this)
m_ampRangeModel.loadSettings(_this, "RangeY");
m_blockSizeModel.loadSettings(_this, "BlockSize");
m_windowModel.loadSettings(_this, "WindowType");
m_envelopeResolutionModel.loadSettings(_this, "EnvelopeRes");
m_spectrumResolutionModel.loadSettings(_this, "SpectrumRes");
m_peakDecayFactorModel.loadSettings(_this, "PeakDecayFactor");
m_averagingWeightModel.loadSettings(_this, "AverageWeight");
m_waterfallHeightModel.loadSettings(_this, "WaterfallHeight");
m_waterfallGammaModel.loadSettings(_this, "WaterfallGamma");
m_windowOverlapModel.loadSettings(_this, "WindowOverlap");
m_zeroPaddingModel.loadSettings(_this, "ZeroPadding");
}
@@ -141,4 +163,14 @@ void SaControls::saveSettings(QDomDocument &doc, QDomElement &parent)
m_ampRangeModel.saveSettings(doc, parent, "RangeY");
m_blockSizeModel.saveSettings(doc, parent, "BlockSize");
m_windowModel.saveSettings(doc, parent, "WindowType");
m_envelopeResolutionModel.saveSettings(doc, parent, "EnvelopeRes");
m_spectrumResolutionModel.saveSettings(doc, parent, "SpectrumRes");
m_peakDecayFactorModel.saveSettings(doc, parent, "PeakDecayFactor");
m_averagingWeightModel.saveSettings(doc, parent, "AverageWeight");
m_waterfallHeightModel.saveSettings(doc, parent, "WaterfallHeight");
m_waterfallGammaModel.saveSettings(doc, parent, "WaterfallGamma");
m_windowOverlapModel.saveSettings(doc, parent, "WindowOverlap");
m_zeroPaddingModel.saveSettings(doc, parent, "ZeroPadding");
}