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Diffstat (limited to 'examples/charts/audio.py')
| -rw-r--r-- | examples/charts/audio.py | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/examples/charts/audio.py b/examples/charts/audio.py deleted file mode 100644 index 256fe3a96..000000000 --- a/examples/charts/audio.py +++ /dev/null @@ -1,127 +0,0 @@ - -############################################################################# -## -## Copyright (C) 2018 The Qt Company Ltd. -## Contact: http://www.qt.io/licensing/ -## -## This file is part of the Qt for Python examples of the Qt Toolkit. -## -## $QT_BEGIN_LICENSE:BSD$ -## You may use this file under the terms of the BSD license as follows: -## -## "Redistribution and use in source and binary forms, with or without -## modification, are permitted provided that the following conditions are -## met: -## * Redistributions of source code must retain the above copyright -## notice, this list of conditions and the following disclaimer. -## * Redistributions in binary form must reproduce the above copyright -## notice, this list of conditions and the following disclaimer in -## the documentation and/or other materials provided with the -## distribution. -## * Neither the name of The Qt Company Ltd nor the names of its -## contributors may be used to endorse or promote products derived -## from this software without specific prior written permission. -## -## -## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -## -## $QT_END_LICENSE$ -## -############################################################################# - -"""PySide2 port of the charts/audio example from Qt v5.x""" - -import os -import sys -from PySide2.QtCharts import QtCharts -from PySide2.QtCore import QPointF, QRect, QSize -from PySide2.QtMultimedia import (QAudio, QAudioDeviceInfo, QAudioFormat, - QAudioInput) -from PySide2.QtWidgets import QApplication, QMainWindow, QMessageBox - -sampleCount = 2000 -resolution = 4 - -class MainWindow(QMainWindow): - def __init__(self, device): - super(MainWindow, self).__init__() - - self.series = QtCharts.QLineSeries() - self.chart = QtCharts.QChart() - self.chart.addSeries(self.series) - self.axisX = QtCharts.QValueAxis() - self.axisX.setRange(0, sampleCount) - self.axisX.setLabelFormat("%g") - self.axisX.setTitleText("Samples") - self.axisY = QtCharts.QValueAxis() - self.axisY.setRange(-1, 1) - self.axisY.setTitleText("Audio level") - self.chart.setAxisX(self.axisX, self.series) - self.chart.setAxisY(self.axisY, self.series) - self.chart.legend().hide() - self.chart.setTitle("Data from the microphone ({})".format(device.deviceName())) - - formatAudio = QAudioFormat() - formatAudio.setSampleRate(8000) - formatAudio.setChannelCount(1) - formatAudio.setSampleSize(8) - formatAudio.setCodec("audio/pcm") - formatAudio.setByteOrder(QAudioFormat.LittleEndian) - formatAudio.setSampleType(QAudioFormat.UnSignedInt) - - self.audioInput = QAudioInput(device, formatAudio, self) - self.ioDevice = self.audioInput.start() - self.ioDevice.readyRead.connect(self._readyRead) - - self.chartView = QtCharts.QChartView(self.chart) - self.setCentralWidget(self.chartView) - - self.buffer = [QPointF(x, 0) for x in range(sampleCount)] - self.series.append(self.buffer) - - def closeEvent(self, event): - if self.audioInput is not None: - self.audioInput.stop() - event.accept() - - def _readyRead(self): - data = self.ioDevice.readAll() - availableSamples = data.size() // resolution - start = 0 - if (availableSamples < sampleCount): - start = sampleCount - availableSamples - for s in range(start): - self.buffer[s].setY(self.buffer[s + availableSamples].y()) - - dataIndex = 0 - for s in range(start, sampleCount): - value = (ord(data[dataIndex]) - 128) / 128 - self.buffer[s].setY(value) - dataIndex = dataIndex + resolution - self.series.replace(self.buffer) - -if __name__ == '__main__': - app = QApplication(sys.argv) - - inputDevice = QAudioDeviceInfo.defaultInputDevice() - if (inputDevice.isNull()): - QMessageBox.warning(None, "audio", "There is no audio input device available.") - sys.exit(-1) - - mainWin = MainWindow(inputDevice) - mainWin.setWindowTitle("audio") - availableGeometry = app.desktop().availableGeometry(mainWin) - size = availableGeometry.height() * 3 / 4 - mainWin.resize(size, size) - mainWin.show() - sys.exit(app.exec_()) |