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Diffstat (limited to 'src/multimedia/audio/qaudiodeviceinfo.cpp')
| -rw-r--r-- | src/multimedia/audio/qaudiodeviceinfo.cpp | 483 |
1 files changed, 0 insertions, 483 deletions
diff --git a/src/multimedia/audio/qaudiodeviceinfo.cpp b/src/multimedia/audio/qaudiodeviceinfo.cpp deleted file mode 100644 index f45805d..0000000 --- a/src/multimedia/audio/qaudiodeviceinfo.cpp +++ /dev/null @@ -1,483 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qaudiodevicefactory_p.h" -#include "qaudiosystem.h" -#include "qaudiodeviceinfo.h" - -#include <QtCore/qmap.h> - -QT_BEGIN_NAMESPACE - -class QAudioDeviceInfoPrivate : public QSharedData -{ -public: - QAudioDeviceInfoPrivate():info(0) {} - QAudioDeviceInfoPrivate(const QString &r, const QByteArray &h, QAudio::Mode m): - realm(r), handle(h), mode(m) - { - if (!handle.isEmpty()) - info = QAudioDeviceFactory::audioDeviceInfo(realm, handle, mode); - else - info = NULL; - } - - QAudioDeviceInfoPrivate(const QAudioDeviceInfoPrivate &other): - QSharedData(other), - realm(other.realm), handle(other.handle), mode(other.mode) - { - info = QAudioDeviceFactory::audioDeviceInfo(realm, handle, mode); - } - - QAudioDeviceInfoPrivate& operator=(const QAudioDeviceInfoPrivate &other) - { - delete info; - - realm = other.realm; - handle = other.handle; - mode = other.mode; - info = QAudioDeviceFactory::audioDeviceInfo(realm, handle, mode); - return *this; - } - - ~QAudioDeviceInfoPrivate() - { - delete info; - } - - QString realm; - QByteArray handle; - QAudio::Mode mode; - QAbstractAudioDeviceInfo* info; -}; - - -/*! - \class QAudioDeviceInfo - \brief The QAudioDeviceInfo class provides an interface to query audio devices and their functionality. - \inmodule QtMultimedia - \ingroup multimedia - - QAudioDeviceInfo lets you query for audio devices--such as sound - cards and USB headsets--that are currently available on the system. - The audio devices available are dependent on the platform or audio plugins installed. - - A QAudioDeviceInfo is used by Qt to construct - classes that communicate with the device--such as - QAudioInput, and QAudioOutput. - - You can also query each device for the formats it supports. A - format in this context is a set consisting of a specific byte - order, channel, codec, frequency, sample rate, and sample type. A - format is represented by the QAudioFormat class. - - The values supported by the the device for each of these - parameters can be fetched with - supportedByteOrders(), supportedChannelCounts(), supportedCodecs(), - supportedSampleRates(), supportedSampleSizes(), and - supportedSampleTypes(). The combinations supported are dependent on the platform, - audio plugins installed and the audio device capabilities. If you need a - specific format, you can check if - the device supports it with isFormatSupported(), or fetch a - supported format that is as close as possible to the format with - nearestFormat(). For instance: - - \snippet doc/src/snippets/multimedia-snippets/audio.cpp Setting audio format - - The static - functions defaultInputDevice(), defaultOutputDevice(), and - availableDevices() let you get a list of all available - devices. Devices are fetched according to the value of mode - this is specified by the \l {QAudio}::Mode enum. - The QAudioDeviceInfo returned are only valid for the \l {QAudio}::Mode. - - For instance: - - \snippet doc/src/snippets/multimedia-snippets/audio.cpp Dumping audio formats - - In this code sample, we loop through all devices that are able to output - sound, i.e., play an audio stream in a supported format. For each device we - find, we simply print the deviceName(). - - \sa QAudioOutput, QAudioInput -*/ - -/*! - Constructs an empty QAudioDeviceInfo object. -*/ -QAudioDeviceInfo::QAudioDeviceInfo(): - d(new QAudioDeviceInfoPrivate) -{ -} - -/*! - Constructs a copy of \a other. - \since 1.0 -*/ -QAudioDeviceInfo::QAudioDeviceInfo(const QAudioDeviceInfo& other): - d(other.d) -{ -} - -/*! - Destroy this audio device info. -*/ -QAudioDeviceInfo::~QAudioDeviceInfo() -{ -} - -/*! - Sets the QAudioDeviceInfo object to be equal to \a other. - \since 1.0 -*/ -QAudioDeviceInfo& QAudioDeviceInfo::operator=(const QAudioDeviceInfo &other) -{ - d = other.d; - return *this; -} - -/*! - Returns whether this QAudioDeviceInfo object holds a device definition. - \since 1.0 -*/ -bool QAudioDeviceInfo::isNull() const -{ - return d->info == 0; -} - -/*! - Returns the human readable name of the audio device. - - Device names vary depending on the platform/audio plugin being used. - - They are a unique string identifier for the audio device. - - eg. default, Intel, U0x46d0x9a4 - \since 1.0 -*/ -QString QAudioDeviceInfo::deviceName() const -{ - return isNull() ? QString() : d->info->deviceName(); -} - -/*! - Returns true if the supplied \a settings are supported by the audio - device described by this QAudioDeviceInfo. - \since 1.0 -*/ -bool QAudioDeviceInfo::isFormatSupported(const QAudioFormat &settings) const -{ - return isNull() ? false : d->info->isFormatSupported(settings); -} - -/*! - Returns the default audio format settings for this device. - - These settings are provided by the platform/audio plugin being used. - - They are also dependent on the \l {QAudio}::Mode being used. - - A typical audio system would provide something like: - \list - \o Input settings: 8000Hz mono 8 bit. - \o Output settings: 44100Hz stereo 16 bit little endian. - \endlist - \since 1.0 -*/ -QAudioFormat QAudioDeviceInfo::preferredFormat() const -{ - return isNull() ? QAudioFormat() : d->info->preferredFormat(); -} - -/*! - Returns the closest QAudioFormat to the supplied \a settings that the system supports. - - These settings are provided by the platform/audio plugin being used. - - They are also dependent on the \l {QAudio}::Mode being used. - \since 1.0 -*/ -QAudioFormat QAudioDeviceInfo::nearestFormat(const QAudioFormat &settings) const -{ - if (isFormatSupported(settings)) - return settings; - - QAudioFormat nearest = settings; - - QList<QString> testCodecs = supportedCodecs(); - QList<int> testChannels = supportedChannels(); - QList<QAudioFormat::Endian> testByteOrders = supportedByteOrders(); - QList<QAudioFormat::SampleType> testSampleTypes; - QList<QAudioFormat::SampleType> sampleTypesAvailable = supportedSampleTypes(); - QMap<int,int> testFrequencies; - QList<int> frequenciesAvailable = supportedFrequencies(); - QMap<int,int> testSampleSizes; - QList<int> sampleSizesAvailable = supportedSampleSizes(); - - // Get sorted lists for checking - if (testCodecs.contains(settings.codec())) { - testCodecs.removeAll(settings.codec()); - testCodecs.insert(0, settings.codec()); - } - testChannels.removeAll(settings.channels()); - testChannels.insert(0, settings.channels()); - testByteOrders.removeAll(settings.byteOrder()); - testByteOrders.insert(0, settings.byteOrder()); - - if (sampleTypesAvailable.contains(settings.sampleType())) - testSampleTypes.append(settings.sampleType()); - if (sampleTypesAvailable.contains(QAudioFormat::SignedInt)) - testSampleTypes.append(QAudioFormat::SignedInt); - if (sampleTypesAvailable.contains(QAudioFormat::UnSignedInt)) - testSampleTypes.append(QAudioFormat::UnSignedInt); - if (sampleTypesAvailable.contains(QAudioFormat::Float)) - testSampleTypes.append(QAudioFormat::Float); - - if (sampleSizesAvailable.contains(settings.sampleSize())) - testSampleSizes.insert(0,settings.sampleSize()); - sampleSizesAvailable.removeAll(settings.sampleSize()); - foreach (int size, sampleSizesAvailable) { - int larger = (size > settings.sampleSize()) ? size : settings.sampleSize(); - int smaller = (size > settings.sampleSize()) ? settings.sampleSize() : size; - bool isMultiple = ( 0 == (larger % smaller)); - int diff = larger - smaller; - testSampleSizes.insert((isMultiple ? diff : diff+100000), size); - } - if (frequenciesAvailable.contains(settings.frequency())) - testFrequencies.insert(0,settings.frequency()); - frequenciesAvailable.removeAll(settings.frequency()); - foreach (int frequency, frequenciesAvailable) { - int larger = (frequency > settings.frequency()) ? frequency : settings.frequency(); - int smaller = (frequency > settings.frequency()) ? settings.frequency() : frequency; - bool isMultiple = ( 0 == (larger % smaller)); - int diff = larger - smaller; - testFrequencies.insert((isMultiple ? diff : diff+100000), frequency); - } - - // Try to find nearest - foreach (QString codec, testCodecs) { - nearest.setCodec(codec); - foreach (QAudioFormat::Endian order, testByteOrders) { - nearest.setByteOrder(order); - foreach (QAudioFormat::SampleType sample, testSampleTypes) { - nearest.setSampleType(sample); - QMapIterator<int, int> sz(testSampleSizes); - while (sz.hasNext()) { - sz.next(); - nearest.setSampleSize(sz.value()); - foreach (int channel, testChannels) { - nearest.setChannels(channel); - QMapIterator<int, int> i(testFrequencies); - while (i.hasNext()) { - i.next(); - nearest.setFrequency(i.value()); - if (isFormatSupported(nearest)) - return nearest; - } - } - } - } - } - } - //Fallback - return preferredFormat(); -} - -/*! - Returns a list of supported codecs. - - All platform and plugin implementations should provide support for: - - "audio/pcm" - Linear PCM - - For writing plugins to support additional codecs refer to: - - http://www.iana.org/assignments/media-types/audio/ - \since 1.0 -*/ -QStringList QAudioDeviceInfo::supportedCodecs() const -{ - return isNull() ? QStringList() : d->info->supportedCodecs(); -} - -/*! - Returns a list of supported sample rates (in Hertz). - - \since 1.0 -*/ -QList<int> QAudioDeviceInfo::supportedSampleRates() const -{ - return supportedFrequencies(); -} - -/*! - \obsolete - - Use supportedSampleRates() instead. - \since 1.0 -*/ -QList<int> QAudioDeviceInfo::supportedFrequencies() const -{ - return isNull() ? QList<int>() : d->info->supportedSampleRates(); -} - -/*! - Returns a list of supported channel counts. - - This is typically 1 for mono sound, or 2 for stereo sound. - - \since 1.0 -*/ -QList<int> QAudioDeviceInfo::supportedChannelCounts() const -{ - return supportedChannels(); -} - -/*! - \obsolete - - Use supportedChannelCount() instead. - \since 1.0 -*/ -QList<int> QAudioDeviceInfo::supportedChannels() const -{ - return isNull() ? QList<int>() : d->info->supportedChannelCounts(); -} - -/*! - Returns a list of supported sample sizes (in bits). - - Typically this will include 8 and 16 bit sample sizes. - - \since 1.0 -*/ -QList<int> QAudioDeviceInfo::supportedSampleSizes() const -{ - return isNull() ? QList<int>() : d->info->supportedSampleSizes(); -} - -/*! - Returns a list of supported byte orders. - \since 1.0 -*/ -QList<QAudioFormat::Endian> QAudioDeviceInfo::supportedByteOrders() const -{ - return isNull() ? QList<QAudioFormat::Endian>() : d->info->supportedByteOrders(); -} - -/*! - Returns a list of supported sample types. - \since 1.0 -*/ -QList<QAudioFormat::SampleType> QAudioDeviceInfo::supportedSampleTypes() const -{ - return isNull() ? QList<QAudioFormat::SampleType>() : d->info->supportedSampleTypes(); -} - -/*! - Returns the information for the default input audio device. - All platform and audio plugin implementations provide a default audio device to use. - \since 1.0 -*/ -QAudioDeviceInfo QAudioDeviceInfo::defaultInputDevice() -{ - return QAudioDeviceFactory::defaultInputDevice(); -} - -/*! - Returns the information for the default output audio device. - All platform and audio plugin implementations provide a default audio device to use. - \since 1.0 -*/ -QAudioDeviceInfo QAudioDeviceInfo::defaultOutputDevice() -{ - return QAudioDeviceFactory::defaultOutputDevice(); -} - -/*! - Returns a list of audio devices that support \a mode. - \since 1.0 -*/ -QList<QAudioDeviceInfo> QAudioDeviceInfo::availableDevices(QAudio::Mode mode) -{ - return QAudioDeviceFactory::availableDevices(mode); -} - - -/*! - \internal - \since 1.0 -*/ -QAudioDeviceInfo::QAudioDeviceInfo(const QString &realm, const QByteArray &handle, QAudio::Mode mode): - d(new QAudioDeviceInfoPrivate(realm, handle, mode)) -{ -} - -/*! - \internal - \since 1.0 -*/ -QString QAudioDeviceInfo::realm() const -{ - return d->realm; -} - -/*! - \internal - \since 1.0 -*/ -QByteArray QAudioDeviceInfo::handle() const -{ - return d->handle; -} - - -/*! - \internal - \since 1.0 -*/ -QAudio::Mode QAudioDeviceInfo::mode() const -{ - return d->mode; -} - -QT_END_NAMESPACE - |