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Diffstat (limited to 'src/plugins/avfoundation/camera/avfaudioencodersettingscontrol.mm')
-rw-r--r-- | src/plugins/avfoundation/camera/avfaudioencodersettingscontrol.mm | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/src/plugins/avfoundation/camera/avfaudioencodersettingscontrol.mm b/src/plugins/avfoundation/camera/avfaudioencodersettingscontrol.mm new file mode 100644 index 000000000..143a444a6 --- /dev/null +++ b/src/plugins/avfoundation/camera/avfaudioencodersettingscontrol.mm @@ -0,0 +1,220 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "avfaudioencodersettingscontrol.h" + +#include "avfcameraservice.h" +#include "avfcamerasession.h" + +#include <AVFoundation/AVFoundation.h> +#include <CoreAudio/CoreAudioTypes.h> + +QT_BEGIN_NAMESPACE + +struct AudioCodecInfo +{ + QString description; + int id; + + AudioCodecInfo() : id(0) { } + AudioCodecInfo(const QString &desc, int i) + : description(desc), id(i) + { } +}; + +typedef QMap<QString, AudioCodecInfo> SupportedAudioCodecs; +Q_GLOBAL_STATIC_WITH_ARGS(QString , defaultCodec, (QLatin1String("aac"))) +Q_GLOBAL_STATIC(SupportedAudioCodecs, supportedCodecs) + +AVFAudioEncoderSettingsControl::AVFAudioEncoderSettingsControl(AVFCameraService *service) + : QAudioEncoderSettingsControl() + , m_service(service) +{ + if (supportedCodecs->isEmpty()) { + supportedCodecs->insert(QStringLiteral("lpcm"), + AudioCodecInfo(QStringLiteral("Linear PCM"), + kAudioFormatLinearPCM)); + supportedCodecs->insert(QStringLiteral("ulaw"), + AudioCodecInfo(QStringLiteral("PCM Mu-Law 2:1"), + kAudioFormatULaw)); + supportedCodecs->insert(QStringLiteral("alaw"), + AudioCodecInfo(QStringLiteral("PCM A-Law 2:1"), + kAudioFormatALaw)); + supportedCodecs->insert(QStringLiteral("ima4"), + AudioCodecInfo(QStringLiteral("IMA 4:1 ADPCM"), + kAudioFormatAppleIMA4)); + supportedCodecs->insert(QStringLiteral("alac"), + AudioCodecInfo(QStringLiteral("Apple Lossless Audio Codec"), + kAudioFormatAppleLossless)); + supportedCodecs->insert(QStringLiteral("aac"), + AudioCodecInfo(QStringLiteral("MPEG-4 Low Complexity AAC"), + kAudioFormatMPEG4AAC)); + supportedCodecs->insert(QStringLiteral("aach"), + AudioCodecInfo(QStringLiteral("MPEG-4 High Efficiency AAC"), + kAudioFormatMPEG4AAC_HE)); + supportedCodecs->insert(QStringLiteral("aacl"), + AudioCodecInfo(QStringLiteral("MPEG-4 AAC Low Delay"), + kAudioFormatMPEG4AAC_LD)); + supportedCodecs->insert(QStringLiteral("aace"), + AudioCodecInfo(QStringLiteral("MPEG-4 AAC Enhanced Low Delay"), + kAudioFormatMPEG4AAC_ELD)); + supportedCodecs->insert(QStringLiteral("aacf"), + AudioCodecInfo(QStringLiteral("MPEG-4 AAC Enhanced Low Delay with SBR"), + kAudioFormatMPEG4AAC_ELD_SBR)); + supportedCodecs->insert(QStringLiteral("aacp"), + AudioCodecInfo(QStringLiteral("MPEG-4 HE AAC V2"), + kAudioFormatMPEG4AAC_HE_V2)); + supportedCodecs->insert(QStringLiteral("ilbc"), + AudioCodecInfo(QStringLiteral("iLBC"), + kAudioFormatiLBC)); + } +} + +QStringList AVFAudioEncoderSettingsControl::supportedAudioCodecs() const +{ + return supportedCodecs->keys(); +} + +QString AVFAudioEncoderSettingsControl::codecDescription(const QString &codecName) const +{ + return supportedCodecs->value(codecName).description; +} + +QList<int> AVFAudioEncoderSettingsControl::supportedSampleRates(const QAudioEncoderSettings &settings, bool *continuous) const +{ + Q_UNUSED(settings) + + if (continuous) + *continuous = true; + + return QList<int>() << 8000 << 96000; +} + +QAudioEncoderSettings AVFAudioEncoderSettingsControl::audioSettings() const +{ + return m_actualSettings; +} + +void AVFAudioEncoderSettingsControl::setAudioSettings(const QAudioEncoderSettings &settings) +{ + if (m_requestedSettings == settings) + return; + + m_requestedSettings = m_actualSettings = settings; +} + +NSDictionary *AVFAudioEncoderSettingsControl::applySettings() +{ + if (m_service->session()->state() != QCamera::LoadedState && + m_service->session()->state() != QCamera::ActiveState) { + return nil; + } + + NSMutableDictionary *settings = [NSMutableDictionary dictionary]; + + QString codec = m_requestedSettings.codec().isEmpty() ? *defaultCodec : m_requestedSettings.codec(); + if (!supportedCodecs->contains(codec)) { + qWarning("Unsupported codec: '%s'", codec.toLocal8Bit().constData()); + codec = *defaultCodec; + } + [settings setObject:[NSNumber numberWithInt:supportedCodecs->value(codec).id] forKey:AVFormatIDKey]; + m_actualSettings.setCodec(codec); + +#ifdef Q_OS_OSX + if (m_requestedSettings.encodingMode() == QMultimedia::ConstantQualityEncoding) { + int quality; + switch (m_requestedSettings.quality()) { + case QMultimedia::VeryLowQuality: + quality = AVAudioQualityMin; + break; + case QMultimedia::LowQuality: + quality = AVAudioQualityLow; + break; + case QMultimedia::HighQuality: + quality = AVAudioQualityHigh; + break; + case QMultimedia::VeryHighQuality: + quality = AVAudioQualityMax; + break; + case QMultimedia::NormalQuality: + default: + quality = AVAudioQualityMedium; + break; + } + [settings setObject:[NSNumber numberWithInt:quality] forKey:AVEncoderAudioQualityKey]; + + } else +#endif + if (m_requestedSettings.bitRate() > 0){ + [settings setObject:[NSNumber numberWithInt:m_requestedSettings.bitRate()] forKey:AVEncoderBitRateKey]; + } + + int sampleRate = m_requestedSettings.sampleRate(); + int channelCount = m_requestedSettings.channelCount(); + +#ifdef Q_OS_IOS + // Some keys are mandatory only on iOS + if (codec == QLatin1String("lpcm")) { + [settings setObject:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey]; + [settings setObject:[NSNumber numberWithInt:NO] forKey:AVLinearPCMIsBigEndianKey]; + [settings setObject:[NSNumber numberWithInt:NO] forKey:AVLinearPCMIsFloatKey]; + [settings setObject:[NSNumber numberWithInt:NO] forKey:AVLinearPCMIsNonInterleaved]; + } + + if (codec == QLatin1String("alac")) + [settings setObject:[NSNumber numberWithInt:24] forKey:AVEncoderBitDepthHintKey]; + + if (sampleRate <= 0) + sampleRate = codec == QLatin1String("ilbc") ? 8000 : 44100; + if (channelCount <= 0) + channelCount = codec == QLatin1String("ilbc") ? 1 : 2; +#endif + + if (sampleRate > 0) { + [settings setObject:[NSNumber numberWithInt:sampleRate] forKey:AVSampleRateKey]; + m_actualSettings.setSampleRate(sampleRate); + } + if (channelCount > 0) { + [settings setObject:[NSNumber numberWithInt:channelCount] forKey:AVNumberOfChannelsKey]; + m_actualSettings.setChannelCount(channelCount); + } + + return settings; +} + +void AVFAudioEncoderSettingsControl::unapplySettings() +{ + m_actualSettings = m_requestedSettings; +} + +QT_END_NAMESPACE |