1 files changed, 90 insertions, 0 deletions
diff --git a/examples/charts/audio/audio.py b/examples/charts/audio/audio.py
new file mode 100644
index 000000000..8ba0b20c5
--- /dev/null
+++ b/examples/charts/audio/audio.py
@@ -0,0 +1,90 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+"""PySide6 port of the charts/audio example from Qt v5.x"""
+
+import sys
+from PySide6.QtCharts import QChart, QChartView, QLineSeries, QValueAxis
+from PySide6.QtCore import QPointF, Slot
+from PySide6.QtMultimedia import QAudioFormat, QAudioSource, QMediaDevices
+from PySide6.QtWidgets import QApplication, QMainWindow, QMessageBox
+
+
+SAMPLE_COUNT = 2000
+
+
+RESOLUTION = 4
+
+
+class MainWindow(QMainWindow):
+    def __init__(self, device):
+        super().__init__()
+
+        self._series = QLineSeries()
+        self._chart = QChart()
+        self._chart.addSeries(self._series)
+        self._axis_x = QValueAxis()
+        self._axis_x.setRange(0, SAMPLE_COUNT)
+        self._axis_x.setLabelFormat("%g")
+        self._axis_x.setTitleText("Samples")
+        self._axis_y = QValueAxis()
+        self._axis_y.setRange(-1, 1)
+        self._axis_y.setTitleText("Audio level")
+        self._chart.setAxisX(self._axis_x, self._series)
+        self._chart.setAxisY(self._axis_y, self._series)
+        self._chart.legend().hide()
+        name = device.description()
+        self._chart.setTitle(f"Data from the microphone ({name})")
+
+        format_audio = QAudioFormat()
+        format_audio.setSampleRate(8000)
+        format_audio.setChannelCount(1)
+        format_audio.setSampleFormat(QAudioFormat.UInt8)
+
+        self._audio_input = QAudioSource(device, format_audio, self)
+        self._io_device = self._audio_input.start()
+        self._io_device.readyRead.connect(self._readyRead)
+
+        self._chart_view = QChartView(self._chart)
+        self.setCentralWidget(self._chart_view)
+
+        self._buffer = [QPointF(x, 0) for x in range(SAMPLE_COUNT)]
+        self._series.append(self._buffer)
+
+    def closeEvent(self, event):
+        if self._audio_input is not None:
+            self._audio_input.stop()
+        event.accept()
+
+    @Slot()
+    def _readyRead(self):
+        data = self._io_device.readAll()
+        available_samples = data.size() // RESOLUTION
+        start = 0
+        if (available_samples < SAMPLE_COUNT):
+            start = SAMPLE_COUNT - available_samples
+            for s in range(start):
+                self._buffer[s].setY(self._buffer[s + available_samples].y())
+
+        data_index = 0
+        for s in range(start, SAMPLE_COUNT):
+            value = (ord(data[data_index]) - 128) / 128
+            self._buffer[s].setY(value)
+            data_index = data_index + RESOLUTION
+        self._series.replace(self._buffer)
+
+
+if __name__ == '__main__':
+    app = QApplication(sys.argv)
+
+    input_devices = QMediaDevices.audioInputs()
+    if not input_devices:
+        QMessageBox.warning(None, "audio", "There is no audio input device available.")
+        sys.exit(-1)
+    main_win = MainWindow(input_devices[0])
+    main_win.setWindowTitle("audio")
+    available_geometry = main_win.screen().availableGeometry()
+    size = available_geometry.height() * 3 / 4
+    main_win.resize(size, size)
+    main_win.show()
+    sys.exit(app.exec())