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| ****************************************************************************/ |
| |
| #include <QtCore/qdebug.h> |
| |
| #include "qaudiosystem.h" |
| #include "qaudiosystemplugin.h" |
| #include "qaudiosystempluginext_p.h" |
| |
| #include "qmediapluginloader_p.h" |
| #include "qaudiodevicefactory_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| static QString defaultKey() |
| { |
| return QStringLiteral("default"); |
| } |
| |
| #if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS) |
| Q_GLOBAL_STATIC_WITH_ARGS(QMediaPluginLoader, audioLoader, |
| (QAudioSystemFactoryInterface_iid, QLatin1String("audio"), Qt::CaseInsensitive)) |
| #endif |
| |
| class QNullDeviceInfo : public QAbstractAudioDeviceInfo |
| { |
| public: |
| QAudioFormat preferredFormat() const override { qWarning()<<"using null deviceinfo, none available"; return QAudioFormat(); } |
| bool isFormatSupported(const QAudioFormat& ) const override { return false; } |
| QAudioFormat nearestFormat(const QAudioFormat& ) const { return QAudioFormat(); } |
| QString deviceName() const override { return QString(); } |
| QStringList supportedCodecs() override { return QStringList(); } |
| QList<int> supportedSampleRates() override { return QList<int>(); } |
| QList<int> supportedChannelCounts() override { return QList<int>(); } |
| QList<int> supportedSampleSizes() override { return QList<int>(); } |
| QList<QAudioFormat::Endian> supportedByteOrders() override { return QList<QAudioFormat::Endian>(); } |
| QList<QAudioFormat::SampleType> supportedSampleTypes() override { return QList<QAudioFormat::SampleType>(); } |
| }; |
| |
| class QNullInputDevice : public QAbstractAudioInput |
| { |
| public: |
| void start(QIODevice*) override { qWarning()<<"using null input device, none available";} |
| QIODevice *start() override { qWarning()<<"using null input device, none available"; return nullptr; } |
| void stop() override {} |
| void reset() override {} |
| void suspend() override {} |
| void resume() override {} |
| int bytesReady() const override { return 0; } |
| int periodSize() const override { return 0; } |
| void setBufferSize(int ) override {} |
| int bufferSize() const override { return 0; } |
| void setNotifyInterval(int ) override {} |
| int notifyInterval() const override { return 0; } |
| qint64 processedUSecs() const override { return 0; } |
| qint64 elapsedUSecs() const override { return 0; } |
| QAudio::Error error() const override { return QAudio::OpenError; } |
| QAudio::State state() const override { return QAudio::StoppedState; } |
| void setFormat(const QAudioFormat&) override {} |
| QAudioFormat format() const override { return QAudioFormat(); } |
| void setVolume(qreal) override {} |
| qreal volume() const override {return 1.0f;} |
| }; |
| |
| class QNullOutputDevice : public QAbstractAudioOutput |
| { |
| public: |
| void start(QIODevice*) override {qWarning()<<"using null output device, none available";} |
| QIODevice *start() override { qWarning()<<"using null output device, none available"; return nullptr; } |
| void stop() override {} |
| void reset() override {} |
| void suspend() override {} |
| void resume() override {} |
| int bytesFree() const override { return 0; } |
| int periodSize() const override { return 0; } |
| void setBufferSize(int ) override {} |
| int bufferSize() const override { return 0; } |
| void setNotifyInterval(int ) override {} |
| int notifyInterval() const override { return 0; } |
| qint64 processedUSecs() const override { return 0; } |
| qint64 elapsedUSecs() const override { return 0; } |
| QAudio::Error error() const override { return QAudio::OpenError; } |
| QAudio::State state() const override { return QAudio::StoppedState; } |
| void setFormat(const QAudioFormat&) override {} |
| QAudioFormat format() const override { return QAudioFormat(); } |
| }; |
| |
| QList<QAudioDeviceInfo> QAudioDeviceFactory::availableDevices(QAudio::Mode mode) |
| { |
| QList<QAudioDeviceInfo> devices; |
| #if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS) |
| QMediaPluginLoader* l = audioLoader(); |
| const auto keys = l->keys(); |
| for (const QString& key : keys) { |
| QAudioSystemFactoryInterface* plugin = qobject_cast<QAudioSystemFactoryInterface*>(l->instance(key)); |
| if (plugin) { |
| const auto availableDevices = plugin->availableDevices(mode); |
| for (const QByteArray& handle : availableDevices) |
| devices << QAudioDeviceInfo(key, handle, mode); |
| } |
| } |
| #endif |
| |
| return devices; |
| } |
| |
| QAudioDeviceInfo QAudioDeviceFactory::defaultDevice(QAudio::Mode mode) |
| { |
| #if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS) |
| QMediaPluginLoader* l = audioLoader(); |
| |
| // Check if there is a default plugin. |
| QAudioSystemFactoryInterface *plugin = qobject_cast<QAudioSystemFactoryInterface *>(l->instance(defaultKey())); |
| if (plugin) { |
| // Check if the plugin has the extension interface. |
| QAudioSystemPluginExtension *pluginExt = qobject_cast<QAudioSystemPluginExtension *>(l->instance(defaultKey())); |
| // Ask for the default device. |
| if (pluginExt) { |
| const QByteArray &device = pluginExt->defaultDevice(mode); |
| if (!device.isEmpty()) |
| return QAudioDeviceInfo(defaultKey(), device, mode); |
| } |
| |
| // If there were no default devices, e.g., if the plugin did not implement the extent-ion interface, |
| // then just pick the first device that's available. |
| const auto &devices = plugin->availableDevices(mode); |
| if (!devices.isEmpty()) |
| return QAudioDeviceInfo(defaultKey(), devices.first(), mode); |
| } |
| |
| // If no plugin is marked as default, check the other plugins. |
| // Note: We're going to prioritize plugins that report a default device. |
| const auto &keys = l->keys(); |
| QAudioDeviceInfo fallbackDevice; |
| for (const auto &key : keys) { |
| if (key == defaultKey()) |
| continue; |
| QAudioSystemFactoryInterface* plugin = qobject_cast<QAudioSystemFactoryInterface*>(l->instance(key)); |
| if (plugin) { |
| // Check if the plugin has the extent-ion interface. |
| QAudioSystemPluginExtension *pluginExt = qobject_cast<QAudioSystemPluginExtension *>(l->instance(key)); |
| if (pluginExt) { |
| const QByteArray &device = pluginExt->defaultDevice(mode); |
| if (!device.isEmpty()) |
| return QAudioDeviceInfo(key, device, mode); |
| } else if (fallbackDevice.isNull()) { |
| const auto &devices = plugin->availableDevices(mode); |
| if (!devices.isEmpty()) |
| fallbackDevice = QAudioDeviceInfo(key, devices.first(), mode); |
| } |
| } |
| } |
| |
| #endif |
| |
| return QAudioDeviceInfo(); |
| } |
| |
| QAbstractAudioDeviceInfo* QAudioDeviceFactory::audioDeviceInfo(const QString &realm, const QByteArray &handle, QAudio::Mode mode) |
| { |
| QAbstractAudioDeviceInfo *rc = nullptr; |
| |
| #if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS) |
| QAudioSystemFactoryInterface* plugin = |
| qobject_cast<QAudioSystemFactoryInterface*>(audioLoader()->instance(realm)); |
| |
| if (plugin) |
| rc = plugin->createDeviceInfo(handle, mode); |
| #endif |
| |
| return rc == nullptr ? new QNullDeviceInfo() : rc; |
| } |
| |
| QAbstractAudioInput* QAudioDeviceFactory::createDefaultInputDevice(QAudioFormat const &format) |
| { |
| return createInputDevice(defaultDevice(QAudio::AudioInput), format); |
| } |
| |
| QAbstractAudioOutput* QAudioDeviceFactory::createDefaultOutputDevice(QAudioFormat const &format) |
| { |
| return createOutputDevice(defaultDevice(QAudio::AudioOutput), format); |
| } |
| |
| QAbstractAudioInput* QAudioDeviceFactory::createInputDevice(QAudioDeviceInfo const& deviceInfo, QAudioFormat const &format) |
| { |
| if (deviceInfo.isNull()) |
| return new QNullInputDevice(); |
| |
| #if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS) |
| QAudioSystemFactoryInterface* plugin = |
| qobject_cast<QAudioSystemFactoryInterface*>(audioLoader()->instance(deviceInfo.realm())); |
| |
| if (plugin) { |
| QAbstractAudioInput* p = plugin->createInput(deviceInfo.handle()); |
| if (p) p->setFormat(format); |
| return p; |
| } |
| #endif |
| |
| return new QNullInputDevice(); |
| } |
| |
| QAbstractAudioOutput* QAudioDeviceFactory::createOutputDevice(QAudioDeviceInfo const& deviceInfo, QAudioFormat const &format) |
| { |
| if (deviceInfo.isNull()) |
| return new QNullOutputDevice(); |
| |
| #if !defined (QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS) |
| QAudioSystemFactoryInterface* plugin = |
| qobject_cast<QAudioSystemFactoryInterface*>(audioLoader()->instance(deviceInfo.realm())); |
| |
| if (plugin) { |
| QAbstractAudioOutput* p = plugin->createOutput(deviceInfo.handle()); |
| if (p) p->setFormat(format); |
| return p; |
| } |
| #endif |
| |
| return new QNullOutputDevice(); |
| } |
| |
| QT_END_NAMESPACE |
| |