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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QMACOSAUDIODATAUTILS_P_H
#define QMACOSAUDIODATAUTILS_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <CoreAudio/AudioHardware.h>
#include "qaudiodevice.h"
#include "qdebug.h"
#include <optional>
#include <vector>
#include <algorithm>
QT_BEGIN_NAMESPACE
template<typename... Args>
void printUnableToReadWarning(const char *logName, AudioObjectID objectID, const AudioObjectPropertyAddress &address, Args &&...args)
{
if (!logName)
return;
char scope[5] = {0};
memcpy(&scope, &address.mScope, 4);
std::reverse(scope, scope + 4);
auto warn = qWarning();
warn << "Unable to read property" << logName << "for object" << objectID << ", scope" << scope << ";";
(warn << ... << args);
warn << "\n If the warning is unexpected use test_audio_config to get comprehensive audio info and report a bug";
}
inline static AudioObjectPropertyAddress
makePropertyAddress(AudioObjectPropertySelector selector, QAudioDevice::Mode mode,
AudioObjectPropertyElement element = kAudioObjectPropertyElementMain)
{
return { selector,
mode == QAudioDevice::Input ? kAudioDevicePropertyScopeInput
: kAudioDevicePropertyScopeOutput,
element };
}
inline static bool getAudioData(AudioObjectID objectID, const AudioObjectPropertyAddress &address,
void *dst, UInt32 dstSize, const char *logName)
{
UInt32 readBytes = dstSize;
const auto res = AudioObjectGetPropertyData(objectID, &address, 0, nullptr, &readBytes, dst);
if (res != noErr)
printUnableToReadWarning(logName, objectID, address, "Err:", res);
else if (readBytes != dstSize)
printUnableToReadWarning(logName, objectID, address, "Data size", readBytes, "VS", dstSize,
"expected");
else
return true;
return false;
}
template<typename T>
std::optional<std::vector<T>> getAudioData(AudioObjectID objectID,
const AudioObjectPropertyAddress &address,
const char *logName, size_t minDataSize = 0)
{
static_assert(std::is_trivial_v<T>, "A trivial type is expected");
UInt32 size = 0;
const auto res = AudioObjectGetPropertyDataSize(objectID, &address, 0, nullptr, &size);
if (res != noErr) {
printUnableToReadWarning(logName, objectID, address,
"AudioObjectGetPropertyDataSize failed, Err:", res);
} else if (size / sizeof(T) < minDataSize) {
printUnableToReadWarning(logName, objectID, address, "Data size is too small:", size, "VS",
minDataSize * sizeof(T), "bytes");
} else {
std::vector<T> data(size / sizeof(T));
if (getAudioData(objectID, address, data.data(), data.size() * sizeof(T), logName))
return { std::move(data) };
}
return {};
}
template<typename T>
std::optional<T> getAudioObject(AudioObjectID objectID, const AudioObjectPropertyAddress &address,
const char *logName)
{
static_assert(std::is_trivial_v<T>, "A trivial type is expected");
T object{};
if (getAudioData(objectID, address, &object, sizeof(T), logName))
return { object };
return {};
}
QT_END_NAMESPACE
#endif // QMACOSAUDIODATAUTILS_P_H
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