Revision control
++ // Copyright (C) 2026 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 QFFMPEG_RANGES_P_H
++ #define QFFMPEG_RANGES_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 <QtCore/qassert.h>
++ #include <QtCore/qtconfigmacros.h>
++ #include <QtMultimedia/private/qiteratorfacade_p.h>
++
++ #ifdef __cpp_lib_ranges
++ # include <ranges>
++ #endif
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QFFmpeg
++ {
++
++ template <typename T, T (*IterateFn)(void **)>
++ class FFmpegOpaqueIteratorRange
++ {
++ struct begin_tag
++ {
++ };
++
++ public:
++ class iterator : public QtMultimediaPrivate::IteratorFacade<iterator, T>
++ {
++ void *m_state = nullptr;
++ T m_current = nullptr;
++
++ public:
++ explicit iterator(begin_tag) { increment(); }
++ iterator() = default;
++
++ void increment() { m_current = IterateFn(&m_state); }
++ const T &dereference() const { return m_current; }
++ bool equals(const iterator &o) const { return m_current == o.m_current; }
++ };
++
++ constexpr iterator begin() const { return iterator(begin_tag{}); }
++ constexpr iterator end() const { return iterator(); }
++ };
++
++ template <typename T, T (*IterateFn)(T)>
++ class FFmpegValueIteratorRange
++ {
++ struct begin_tag
++ {
++ };
++
++ public:
++ class iterator : public QtMultimediaPrivate::IteratorFacade<iterator, T>
++ {
++ T m_current = {};
++
++ public:
++ explicit iterator(begin_tag) { increment(); }
++ iterator() = default;
++
++ void increment() { m_current = IterateFn(m_current); }
++ const T &dereference() const { return m_current; }
++ bool equals(const iterator &o) const { return m_current == o.m_current; }
++ };
++
++ constexpr iterator begin() const { return iterator(begin_tag{}); }
++ constexpr iterator end() const { return iterator(); }
++ };
++
++ } // namespace QFFmpeg
++
++ QT_END_NAMESPACE
++
++ #ifdef __cpp_lib_ranges
++ namespace std::ranges {
++ template <typename T, T (*IterateFn)(void **)>
++ inline constexpr bool enable_view<QT_PREPEND_NAMESPACE(QFFmpeg::FFmpegOpaqueIteratorRange)
++ <T, IterateFn>> = true;
++
++ template <typename T, T (*IterateFn)(T)>
++ inline constexpr bool enable_view<QT_PREPEND_NAMESPACE(QFFmpeg::FFmpegValueIteratorRange)
++ <T, IterateFn>> = true;
++ }
++ #endif
++
++ #endif