1// Copyright (C) 2024 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QFFMPEGCODEC_P_H
5#define QFFMPEGCODEC_P_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtFFmpegMediaPluginImpl/private/qffmpegdefs_p.h> // Important: Must be included first
19
20#include <QtCore/qlatin1stringview.h>
21#include <QtCore/qspan.h>
22
23#include <vector>
24
25extern "C" {
26#include <libavcodec/codec.h>
27}
28
29QT_BEGIN_NAMESPACE
30
31namespace QFFmpeg {
32
33class Codec
34{
35public:
36 explicit Codec(const AVCodec *codec);
37
38 [[nodiscard]] const AVCodec *get() const noexcept;
39 [[nodiscard]] AVCodecID id() const noexcept;
40 [[nodiscard]] QLatin1StringView name() const noexcept;
41 [[nodiscard]] AVMediaType type() const noexcept;
42 [[nodiscard]] int capabilities() const noexcept;
43 [[nodiscard]] bool isEncoder() const noexcept;
44 [[nodiscard]] bool isDecoder() const noexcept;
45 [[nodiscard]] bool isExperimental() const noexcept;
46 [[nodiscard]] QSpan<const AVPixelFormat> pixelFormats() const noexcept;
47 [[nodiscard]] QSpan<const AVSampleFormat> sampleFormats() const noexcept;
48 [[nodiscard]] QSpan<const int> sampleRates() const noexcept;
49 [[nodiscard]] QSpan<const ChannelLayoutT> channelLayouts() const noexcept;
50 [[nodiscard]] QSpan<const AVRational> frameRates() const noexcept;
51 [[nodiscard]] std::vector<const AVCodecHWConfig *> hwConfigs() const noexcept;
52
53private:
54 const AVCodec *m_codec = nullptr;
55};
56
57// Minimal iterator to support range-based for-loop
58class CodecIterator
59{
60public:
61 // named constructors
62 static CodecIterator begin();
63 static CodecIterator end();
64
65 CodecIterator &operator++() noexcept;
66 [[nodiscard]] Codec operator*() const noexcept;
67 [[nodiscard]] bool operator!=(const CodecIterator &other) const noexcept;
68
69private:
70 void *m_state = nullptr;
71 const AVCodec *m_codec = nullptr;
72};
73
74using CodecEnumerator = CodecIterator;
75
76// Helper function to wrap pixel formats inside a span
77QSpan<const AVPixelFormat> makeSpan(const AVPixelFormat *values);
78
79} // namespace QFFmpeg
80
81QT_END_NAMESPACE
82
83#endif
84

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source code of qtmultimedia/src/plugins/multimedia/ffmpeg/qffmpegcodec_p.h