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// 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 QMULTIMEDIA_DRM_SUPPORT_P_H
#define QMULTIMEDIA_DRM_SUPPORT_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 <QtMultimedia/private/qtmultimediaglobal_p.h>
#include <QtMultimedia/qvideoframeformat.h>
#include <QtCore/qspan.h>
#include <QtCore/qstring.h>
#include <cstdint>
#include <optional>
QT_BEGIN_NAMESPACE
class QDebug;
namespace QtMultimediaPrivate {
// see DRM_FORMAT_MOD_VENDOR_* in drm_fourcc.h
enum class DRMModifier : std::uint64_t { };
static constexpr DRMModifier DmaBufFormatModifierInvalid = DRMModifier{ (1ULL << 56) - 1 };
static constexpr DRMModifier DrmFormatModifierLinear = DRMModifier{ 0 };
Q_MULTIMEDIA_EXPORT QString toString(DRMModifier modifier);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug debug, DRMModifier modifier);
constexpr uint32_t fourcc_code(char a, char b, char c, char d)
{
return ((uint32_t)(a) | ((uint32_t)(b) << 8) | ((uint32_t)(c) << 16) | ((uint32_t)(d) << 24));
}
// clang-format off
enum class DRMFormat : std::uint32_t {
RGBA8888 = fourcc_code('R', 'A', '2', '4'), /* [31:0] R:G:B:A 8:8:8:8 little endian */
RGB888 = fourcc_code('R', 'G', '2', '4'), /* [23:0] R:G:B little endian */
RG88 = fourcc_code('R', 'G', '8', '8'), /* [15:0] R:G 8:8 little endian */
ARGB8888 = fourcc_code('A', 'R', '2', '4'), /* [31:0] A:R:G:B 8:8:8:8 little endian */
ABGR8888 = fourcc_code('A', 'B', '2', '4'), /* [31:0] A:B:G:R 8:8:8:8 little endian */
XRGB8888 = fourcc_code('X', 'R', '2', '4'), /* [31:0] x:R:G:B 8:8:8:8 little endian */
XBGR8888 = fourcc_code('X', 'B', '2', '4'), /* [31:0] x:B:G:R 8:8:8:8 little endian */
BGRA8888 = fourcc_code('B', 'A', '2', '4'), /* [31:0] B:G:R:A 8:8:8:8 little endian */
BGR888 = fourcc_code('B', 'G', '2', '4'), /* [23:0] B:G:R little endian */
GR88 = fourcc_code('G', 'R', '8', '8'), /* [15:0] G:R 8:8 little endian */
R8 = fourcc_code('R', '8', ' ', ' '), /* [7:0] R */
R16 = fourcc_code('R', '1', '6', ' '), /* [15:0] R little endian */
RGB565 = fourcc_code('R', 'G', '1', '6'), /* [15:0] R:G:B 5:6:5 little endian */
RG1616 = fourcc_code('R', 'G', '3', '2'), /* [31:0] R:G 16:16 little endian */
GR1616 = fourcc_code('G', 'R', '3', '2'), /* [31:0] G:R 16:16 little endian */
BGRA1010102 = fourcc_code('B', 'A', '3', '0'), /* [31:0] B:G:R:A 10:10:10:2 little endian */
YUYV = fourcc_code('Y', 'U', 'Y', 'V'), /* [31:0] Cr0:Y1:Cb0:Y0 8:8:8:8 little endian */
UYVY = fourcc_code('U', 'Y', 'V', 'Y'), /* [31:0] Y1:Cr0:Y0:Cb0 8:8:8:8 little endian */
AYUV = fourcc_code('A', 'Y', 'U', 'V'), /* [31:0] A:Y:Cb:Cr 8:8:8:8 little endian */
NV12 = fourcc_code('N', 'V', '1', '2'), /* 2x2 subsampled Cr:Cb plane */
NV21 = fourcc_code('N', 'V', '2', '1'), /* 2x2 subsampled Cb:Cr plane */
P010 = fourcc_code('P', '0', '1', '0'), /* 2x2 subsampled Cr:Cb plane, 10 bits per channel */
P016 = fourcc_code('P', '0', '1', '6'), /* 2x2 subsampled Cr:Cb plane, 16 bits per channel */
YUV411 = fourcc_code('Y', 'U', '1', '1'), /* 4x1 subsampled Cb (1) and Cr (2) planes */
YUV420 = fourcc_code('Y', 'U', '1', '2'), /* 2x2 subsampled Cb (1) and Cr (2) planes */
YVU420 = fourcc_code('Y', 'V', '1', '2'), /* 2x2 subsampled Cr (1) and Cb (2) planes */
YUV422 = fourcc_code('Y', 'U', '1', '6'), /* 2x1 subsampled Cb (1) and Cr (2) planes */
YUV444 = fourcc_code('Y', 'U', '2', '4'), /* non-subsampled Cb (1) and Cr (2) planes */
MJPEG = fourcc_code('M', 'J', 'P', 'G'), /* Motion-JPEG */
};
// clang-format on
Q_MULTIMEDIA_EXPORT QString toString(DRMFormat format);
Q_MULTIMEDIA_EXPORT QDebug operator<<(QDebug debug, DRMFormat format);
#if __cplusplus >= 202302L
# define constexpr_cxx23 constexpr
#else
# define constexpr_cxx23 inline
#endif
constexpr_cxx23 QSpan<const DRMFormat>
dmaBufFourccFromPixelFormat(const QVideoFrameFormat::PixelFormat format)
{
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
constexpr DRMFormat rgba_fourcc = DRMFormat::ABGR8888;
constexpr DRMFormat rg_fourcc = DRMFormat::GR88;
constexpr DRMFormat rg16_fourcc = DRMFormat::GR1616;
#else
constexpr DRMFormat rgba_fourcc = DRMFormat::RGBA8888;
constexpr DRMFormat rg_fourcc = DRMFormat::RG88;
constexpr DRMFormat rg16_fourcc = DRMFormat::RG1616;
#endif
switch (format) {
case QVideoFrameFormat::Format_Invalid:
case QVideoFrameFormat::Format_IMC1:
case QVideoFrameFormat::Format_IMC2:
case QVideoFrameFormat::Format_IMC3:
case QVideoFrameFormat::Format_IMC4:
case QVideoFrameFormat::Format_SamplerExternalOES:
case QVideoFrameFormat::Format_SamplerRect:
return {};
case QVideoFrameFormat::Format_Jpeg: {
static constexpr DRMFormat format[] = { DRMFormat::MJPEG };
return format;
}
case QVideoFrameFormat::Format_ARGB8888:
case QVideoFrameFormat::Format_ARGB8888_Premultiplied:
case QVideoFrameFormat::Format_XRGB8888:
case QVideoFrameFormat::Format_BGRA8888:
case QVideoFrameFormat::Format_BGRA8888_Premultiplied:
case QVideoFrameFormat::Format_BGRX8888:
case QVideoFrameFormat::Format_ABGR8888:
case QVideoFrameFormat::Format_XBGR8888:
case QVideoFrameFormat::Format_RGBA8888:
case QVideoFrameFormat::Format_RGBX8888:
case QVideoFrameFormat::Format_AYUV:
case QVideoFrameFormat::Format_AYUV_Premultiplied:
case QVideoFrameFormat::Format_UYVY:
case QVideoFrameFormat::Format_YUYV: {
static constexpr DRMFormat format[] = { rgba_fourcc };
return format;
}
case QVideoFrameFormat::Format_Y8: {
static constexpr DRMFormat format[] = { DRMFormat::R8 };
return format;
}
case QVideoFrameFormat::Format_Y16: {
static constexpr DRMFormat format[] = { DRMFormat::R16 };
return format;
}
case QVideoFrameFormat::Format_YUV420P:
case QVideoFrameFormat::Format_YUV422P:
case QVideoFrameFormat::Format_YV12: {
static constexpr DRMFormat format[] = { DRMFormat::R8, DRMFormat::R8, DRMFormat::R8 };
return format;
}
case QVideoFrameFormat::Format_YUV420P10: {
static constexpr DRMFormat format[] = { DRMFormat::R16, DRMFormat::R16, DRMFormat::R16 };
return format;
}
case QVideoFrameFormat::Format_NV12:
case QVideoFrameFormat::Format_NV21: {
static constexpr DRMFormat format[] = { DRMFormat::R8, rg_fourcc };
return format;
}
case QVideoFrameFormat::Format_P010:
case QVideoFrameFormat::Format_P016: {
static constexpr DRMFormat format[] = { DRMFormat::R16, rg16_fourcc };
return format;
}
}
return {};
}
constexpr_cxx23 std::optional<DRMFormat>
dmaBufSingleImageFourccFromPixelFormat(const QVideoFrameFormat::PixelFormat format)
{
switch (format) {
case QVideoFrameFormat::Format_NV12:
return DRMFormat::NV12;
case QVideoFrameFormat::Format_NV21:
return DRMFormat::NV21;
case QVideoFrameFormat::Format_P010:
return DRMFormat::P010;
case QVideoFrameFormat::Format_P016:
return DRMFormat::P016;
case QVideoFrameFormat::Format_YUV420P:
return DRMFormat::YUV420;
case QVideoFrameFormat::Format_YV12:
return DRMFormat::YVU420;
case QVideoFrameFormat::Format_YUV422P:
return DRMFormat::YUV422;
default:
return std::nullopt;
}
}
#undef constexpr_cxx23
constexpr std::optional<QVideoFrameFormat::PixelFormat> pixelFormatFromDrmFourcc(DRMFormat format)
{
switch (format) {
case DRMFormat::NV12:
return QVideoFrameFormat::Format_NV12;
case DRMFormat::NV21:
return QVideoFrameFormat::Format_NV21;
case DRMFormat::YUV420:
return QVideoFrameFormat::Format_YUV420P;
case DRMFormat::YVU420:
return QVideoFrameFormat::Format_YV12;
case DRMFormat::YUV422:
return QVideoFrameFormat::Format_YUV422P;
case DRMFormat::YUYV:
return QVideoFrameFormat::Format_YUYV;
case DRMFormat::UYVY:
return QVideoFrameFormat::Format_UYVY;
case DRMFormat::XRGB8888:
return QVideoFrameFormat::Format_XRGB8888;
case DRMFormat::XBGR8888:
return QVideoFrameFormat::Format_XBGR8888;
case DRMFormat::ARGB8888:
return QVideoFrameFormat::Format_ARGB8888;
case DRMFormat::ABGR8888:
return QVideoFrameFormat::Format_ABGR8888;
case DRMFormat::R8:
return QVideoFrameFormat::Format_Y8;
case DRMFormat::R16:
return QVideoFrameFormat::Format_Y16;
case DRMFormat::P010:
return QVideoFrameFormat::Format_P010;
case DRMFormat::P016:
return QVideoFrameFormat::Format_P016;
case DRMFormat::MJPEG:
return QVideoFrameFormat::Format_Jpeg;
// these formats are ambiguous, because they can be premultiplied:
case DRMFormat::RGBA8888:
return QVideoFrameFormat::Format_RGBA8888;
case DRMFormat::BGRA8888:
return QVideoFrameFormat::Format_BGRA8888;
case DRMFormat::AYUV:
return QVideoFrameFormat::Format_AYUV;
// No QVideoFrameFormat equivalent at all (e.g. 24bpp RGB/BGR with no alpha channel).
case DRMFormat::RGB888:
case DRMFormat::RG88:
case DRMFormat::BGR888:
case DRMFormat::GR88:
case DRMFormat::RGB565:
case DRMFormat::RG1616:
case DRMFormat::GR1616:
case DRMFormat::BGRA1010102:
case DRMFormat::YUV411:
case DRMFormat::YUV444:
return std::nullopt;
}
return std::nullopt;
}
struct DmaBufPlane
{
int fd = -1;
uint32_t offset = 0;
uint32_t pitch = 0;
DRMFormat drmFormat = DRMFormat::RGBA8888;
DRMModifier modifier = DmaBufFormatModifierInvalid;
};
enum class DmaBufImportMode : uint8_t {
PerPlane, // one EGL image per plane, using each plane's own DRM format
SingleImage, // all planes packed into a single EGL image described by planes[0].drmFormat
};
} // namespace QtMultimediaPrivate
QT_END_NAMESPACE
#endif