diff options
Diffstat (limited to 'examples/multimedia/audiooutput/audiooutput.py')
| -rw-r--r-- | examples/multimedia/audiooutput/audiooutput.py | 81 |
1 files changed, 24 insertions, 57 deletions
diff --git a/examples/multimedia/audiooutput/audiooutput.py b/examples/multimedia/audiooutput/audiooutput.py index 2950a66a0..c2cbd730f 100644 --- a/examples/multimedia/audiooutput/audiooutput.py +++ b/examples/multimedia/audiooutput/audiooutput.py @@ -1,44 +1,7 @@ - -############################################################################# -## -## Copyright (C) 2013 Riverbank Computing Limited. -## Copyright (C) 2016 The Qt Company Ltd. -## Contact: https://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." -## -## $QT_END_LICENSE$ -## -############################################################################# +# Copyright (C) 2013 Riverbank Computing Limited. +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause +from __future__ import annotations """PySide6 port of the multimedia/audiooutput example from Qt v5.x, originating from PyQt""" @@ -48,7 +11,7 @@ from struct import pack from PySide6.QtCore import (QByteArray, QIODevice, Qt, QSysInfo, QTimer, qWarning, Slot) -from PySide6.QtMultimedia import (QAudio, QAudioDevice, QAudioFormat, +from PySide6.QtMultimedia import (QAudio, QAudioFormat, QAudioSink, QMediaDevices) from PySide6.QtWidgets import (QApplication, QComboBox, QHBoxLayout, QLabel, QMainWindow, QPushButton, QSlider, @@ -78,24 +41,23 @@ class Generator(QIODevice): sample_size = fmt.bytesPerSample() * 8 if sample_size == 8: if fmt.sampleFormat() == QAudioFormat.UInt8: - scaler = lambda x: ((1.0 + x) / 2 * 255) + scaler = lambda x: ((1.0 + x) / 2 * 255) # noqa: E731 pack_format = 'B' elif fmt.sampleFormat() == QAudioFormat.Int16: - scaler = lambda x: x * 127 + scaler = lambda x: x * 127 # noqa: E731 pack_format = 'b' elif sample_size == 16: little_endian = QSysInfo.ByteOrder == QSysInfo.LittleEndian if fmt.sampleFormat() == QAudioFormat.UInt8: - scaler = lambda x: (1.0 + x) / 2 * 65535 + scaler = lambda x: (1.0 + x) / 2 * 65535 # noqa: E731 pack_format = '<H' if little_endian else '>H' elif fmt.sampleFormat() == QAudioFormat.Int16: - scaler = lambda x: x * 32767 + scaler = lambda x: x * 32767 # noqa: E731 pack_format = '<h' if little_endian else '>h' - assert(pack_format != '') + assert pack_format != '' channel_bytes = fmt.bytesPerSample() - sample_bytes = fmt.channelCount() * channel_bytes length = (fmt.sampleRate() * fmt.channelCount() * channel_bytes) * durationUs // 100000 @@ -171,16 +133,14 @@ class AudioTest(QMainWindow): layout.addWidget(self.m_modeButton) - self.m_suspendResumeButton = QPushButton( - clicked=self.toggle_suspend_resume) + self.m_suspendResumeButton = QPushButton(clicked=self.toggle_suspend_resume) self.m_suspendResumeButton.setText(self.SUSPEND_LABEL) layout.addWidget(self.m_suspendResumeButton) volume_box = QHBoxLayout() volume_label = QLabel("Volume:") - self.m_volumeSlider = QSlider(Qt.Horizontal, minimum=0, maximum=100, - singleStep=10) + self.m_volumeSlider = QSlider(Qt.Horizontal, minimum=0, maximum=100, singleStep=10) self.m_volumeSlider.valueChanged.connect(self.volume_changed) volume_box.addWidget(volume_label) @@ -205,8 +165,8 @@ class AudioTest(QMainWindow): qWarning("Default format not supported - trying to use nearest") self.m_format = info.nearestFormat(self.m_format) - self.m_generator = Generator(self.m_format, - self.DURATION_SECONDS * 1000000, self.TONE_SAMPLE_RATE_HZ, self) + self.m_generator = Generator(self.m_format, self.DURATION_SECONDS * 1000000, + self.TONE_SAMPLE_RATE_HZ, self) self.create_audio_output() @@ -218,11 +178,18 @@ class AudioTest(QMainWindow): self.m_audioSink.start(self.m_generator) self.m_volumeSlider.setValue(self.m_audioSink.volume() * 100) - @Slot(int) - def device_changed(self, index): + def closeEvent(self, e): + self.stop() + e.accept() + + def stop(self): self.m_pullTimer.stop() self.m_generator.stop() self.m_audioSink.stop() + + @Slot(int) + def device_changed(self, index): + self.stop() self.m_device = self.m_deviceBox.itemData(index) self.create_audio_output() @@ -289,7 +256,7 @@ class AudioTest(QMainWindow): QAudio.StoppedState: "StoppedState", QAudio.IdleState: "IdleState"} - @Slot(QAudio.State) + @Slot("QAudio::State") def handle_state_changed(self, state): state = self.state_map.get(state, 'Unknown') qWarning(f"state = {state}") |