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Diffstat (limited to 'tests/spectrum/spectrumapp/spectrum.h')
-rw-r--r-- | tests/spectrum/spectrumapp/spectrum.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/tests/spectrum/spectrumapp/spectrum.h b/tests/spectrum/spectrumapp/spectrum.h new file mode 100644 index 00000000..015989d5 --- /dev/null +++ b/tests/spectrum/spectrumapp/spectrum.h @@ -0,0 +1,111 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the QtDataVis3D module. +** +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** +****************************************************************************/ + +#ifndef SPECTRUM_H +#define SPECTRUM_H + +#include "utils.h" +#include "fftreal_wrapper.h" // For FFTLengthPowerOfTwo +#include <qglobal.h> + +//----------------------------------------------------------------------------- +// Constants +//----------------------------------------------------------------------------- + +// Number of audio samples used to calculate the frequency spectrum +const int SpectrumLengthSamples = PowerOfTwo<FFTLengthPowerOfTwo>::Result; + +// Number of bands in the frequency spectrum +const int SpectrumNumBands = 30; + +// Lower bound of first band in the spectrum +const qreal SpectrumLowFreq = 0.0; // Hz + +// Upper band of last band in the spectrum +const qreal SpectrumHighFreq = 1000.0; // Hz + +// Waveform window size in microseconds +const qint64 WaveformWindowDuration = 500 * 1000; + +// Fudge factor used to calculate the spectrum bar heights +const qreal SpectrumAnalyserMultiplier = 0.15; + +// Disable message timeout +const int NullMessageTimeout = -1; + + +//----------------------------------------------------------------------------- +// Types and data structures +//----------------------------------------------------------------------------- + +enum WindowFunction { + NoWindow, + HannWindow +}; + +const WindowFunction DefaultWindowFunction = HannWindow; + +struct Tone +{ + Tone(qreal freq = 0.0, qreal amp = 0.0) + : frequency(freq), amplitude(amp) + { } + + // Start and end frequencies for swept tone generation + qreal frequency; + + // Amplitude in range [0.0, 1.0] + qreal amplitude; +}; + +struct SweptTone +{ + SweptTone(qreal start = 0.0, qreal end = 0.0, qreal amp = 0.0) + : startFreq(start), endFreq(end), amplitude(amp) + { Q_ASSERT(end >= start); } + + SweptTone(const Tone &tone) + : startFreq(tone.frequency), endFreq(tone.frequency), amplitude(tone.amplitude) + { } + + // Start and end frequencies for swept tone generation + qreal startFreq; + qreal endFreq; + + // Amplitude in range [0.0, 1.0] + qreal amplitude; +}; + + +//----------------------------------------------------------------------------- +// Macros +//----------------------------------------------------------------------------- + +// Macro which connects a signal to a slot, and which causes application to +// abort if the connection fails. This is intended to catch programming errors +// such as mis-typing a signal or slot name. It is necessary to write our own +// macro to do this - the following idiom +// Q_ASSERT(connect(source, signal, receiver, slot)); +// will not work because Q_ASSERT compiles to a no-op in release builds. + +#define CHECKED_CONNECT(source, signal, receiver, slot) \ + if (!connect(source, signal, receiver, slot)) \ + qt_assert_x(Q_FUNC_INFO, "CHECKED_CONNECT failed", __FILE__, __LINE__); + +#endif // SPECTRUM_H + |