def __init__(self, parent, audiobackend, logger=PrintLogger()):
super().__init__(parent)
self.logger = logger
self.setObjectName("Spectrogram_Widget")
self.gridLayout = QtWidgets.QGridLayout(self)
self.gridLayout.setObjectName("gridLayout")
self.PlotZoneImage = ImagePlot(self, self.logger, audiobackend)
self.PlotZoneImage.setObjectName("PlotZoneImage")
self.gridLayout.addWidget(self.PlotZoneImage, 0, 1, 1, 1)
self.audiobuffer = None
self.audiobackend = audiobackend
# initialize the class instance that will do the fft
self.proc = audioproc(self.logger)
self.maxfreq = DEFAULT_MAXFREQ
self.proc.set_maxfreq(self.maxfreq)
self.minfreq = DEFAULT_MINFREQ
self.fft_size = 2 ** DEFAULT_FFT_SIZE * 32
self.proc.set_fftsize(self.fft_size)
self.spec_min = DEFAULT_SPEC_MIN
self.spec_max = DEFAULT_SPEC_MAX
self.weighting = DEFAULT_WEIGHTING
self.update_weighting()
self.freq = self.proc.get_freq_scale()
self.timerange_s = DEFAULT_TIMERANGE
self.canvas_width = 100.
self.old_index = 0
self.overlap = 3. / 4.
self.overlap_frac = Fraction(3, 4)
self.dT_s = self.fft_size * (1. - self.overlap) / float(SAMPLING_RATE)
self.PlotZoneImage.setlog10freqscale() # DEFAULT_FREQ_SCALE = 1 #log10
self.PlotZoneImage.setfreqrange(self.minfreq, self.maxfreq)
self.PlotZoneImage.setspecrange(self.spec_min, self.spec_max)
self.PlotZoneImage.setweighting(self.weighting)
self.PlotZoneImage.settimerange(self.timerange_s, self.dT_s)
self.update_jitter()
sfft_rate_frac = Fraction(SAMPLING_RATE, self.fft_size) / (Fraction(1) - self.overlap_frac) / 1000
self.PlotZoneImage.set_sfft_rate(sfft_rate_frac)
# initialize the settings dialog
self.settings_dialog = Spectrogram_Settings_Dialog(self, self.logger)
self.audiobackend.underflow.connect(self.PlotZoneImage.plotImage.canvasscaledspectrogram.syncOffsets)
self.last_data_time = 0.
self.mustRestart = False
def __init__(self, parent, logger = None):
QtGui.QWidget.__init__(self, parent)
# store the logger instance
if logger is None:
self.logger = parent.parent().logger
else:
self.logger = logger
self.parent = parent
self.setObjectName("Spectrogram_Widget")
self.gridLayout = QtGui.QGridLayout(self)
self.gridLayout.setObjectName("gridLayout")
self.PlotZoneImage = ImagePlot(self, self.logger)
self.PlotZoneImage.setObjectName("PlotZoneImage")
self.gridLayout.addWidget(self.PlotZoneImage, 0, 1, 1, 1)
self.audiobuffer = None
# initialize the class instance that will do the fft
self.proc = audioproc(self.logger)
self.maxfreq = DEFAULT_MAXFREQ
self.minfreq = DEFAULT_MINFREQ
self.fft_size = 2**DEFAULT_FFT_SIZE*32
self.spec_min = DEFAULT_SPEC_MIN
self.spec_max = DEFAULT_SPEC_MAX
self.weighting = DEFAULT_WEIGHTING
self.spectrogram_timer_time = 0.
self.timerange_s = DEFAULT_TIMERANGE
self.canvas_width = 100.
self.PlotZoneImage.setlog10freqscale() #DEFAULT_FREQ_SCALE = 1 #log10
self.PlotZoneImage.setfreqrange(self.minfreq, self.maxfreq)
self.PlotZoneImage.setspecrange(self.spec_min, self.spec_max)
self.PlotZoneImage.setweighting(self.weighting)
self.PlotZoneImage.settimerange(self.timerange_s)
# this timer is used to update the spectrogram widget, whose update period
# is fixed by the time scale and the width of the widget canvas
self.timer = QtCore.QTimer()
self.period_ms = SMOOTH_DISPLAY_TIMER_PERIOD_MS
self.timer.setInterval(self.period_ms) # variable timing
# initialize the settings dialog
self.settings_dialog = Spectrogram_Settings_Dialog(self, self.logger)
# timer ticks
self.connect(self.timer, QtCore.SIGNAL('timeout()'), self.timer_slot)
# window resize
self.connect(self.PlotZoneImage.plotImage.canvasscaledspectrogram, QtCore.SIGNAL("canvasWidthChanged"), self.canvasWidthChanged)
# we do not use the display timer since we have a special one
# tell the caller by setting this variable as None
self.update = None
self.timer_time = QtCore.QTime()
