// Copyright (C) 2024 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 QAUDIOFORMAT_P_H #define QAUDIOFORMAT_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 #include #include QT_BEGIN_NAMESPACE namespace QtMultimediaPrivate { inline constexpr std::array allSupportedSampleRates{ 8'000, 11'025, 12'000, 16'000, 22'050, 24'000, 32'000, 44'100, 48'000, 64'000, 88'200, 96'000, 128'000, 176'400, 192'000, }; inline constexpr std::array allSupportedSampleFormats{ QAudioFormat::UInt8, QAudioFormat::Int16, QAudioFormat::Int32, QAudioFormat::Float, }; template int findClosestSamplingRate(int rate, QSpan supportedRates) { Q_ASSERT(!supportedRates.empty()); auto exactMatchIt = std::find(supportedRates.begin(), supportedRates.end(), T(rate)); if (exactMatchIt != supportedRates.end()) return int(*exactMatchIt); // find supported rate, which is closest to the default pipewire sampling rate (using a // logarithmic scaling) auto ratioToRate = [&](int arg) { return arg > rate ? float(arg) / rate : rate / float(arg); }; return *std::min_element(supportedRates.begin(), supportedRates.end(), [&](auto lhs, auto rhs) { return ratioToRate(lhs) < ratioToRate(rhs); }); } } // namespace QtMultimediaPrivate QT_END_NAMESPACE #endif // QAUDIOFORMAT_P_H