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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#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
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