| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QVIDEOTEXTUREHELPER_H |
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| 5 | #define QVIDEOTEXTUREHELPER_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <qvideoframeformat.h> |
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| 19 | #include <rhi/qrhi.h> |
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| 20 | |
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| 21 | #include <QtGui/qtextlayout.h> |
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| 22 | |
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| 23 | QT_BEGIN_NAMESPACE |
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| 24 | |
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| 25 | class QVideoFrame; |
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| 26 | class QTextLayout; |
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| 27 | class QVideoFrameTextures; |
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| 28 | |
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| 29 | namespace QVideoTextureHelper |
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| 30 | { |
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| 31 | |
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| 32 | struct TextureDescription |
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| 33 | { |
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| 34 | static constexpr int maxPlanes = 3; |
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| 35 | struct SizeScale { |
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| 36 | int x; |
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| 37 | int y; |
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| 38 | }; |
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| 39 | using BytesRequired = int(*)(int stride, int height); |
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| 40 | |
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| 41 | inline int strideForWidth(int width) const { return (width*strideFactor + 15) & ~15; } |
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| 42 | inline int bytesForSize(QSize s) const { return bytesRequired(strideForWidth(width: s.width()), s.height()); } |
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| 43 | int widthForPlane(int width, int plane) const |
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| 44 | { |
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| 45 | if (plane > nplanes) return 0; |
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| 46 | return (width + sizeScale[plane].x - 1)/sizeScale[plane].x; |
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| 47 | } |
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| 48 | int heightForPlane(int height, int plane) const |
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| 49 | { |
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| 50 | if (plane > nplanes) return 0; |
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| 51 | return (height + sizeScale[plane].y - 1)/sizeScale[plane].y; |
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| 52 | } |
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| 53 | |
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| 54 | int nplanes; |
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| 55 | int strideFactor; |
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| 56 | BytesRequired bytesRequired; |
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| 57 | QRhiTexture::Format textureFormat[maxPlanes]; |
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| 58 | SizeScale sizeScale[maxPlanes]; |
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| 59 | }; |
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| 60 | |
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| 61 | Q_MULTIMEDIA_EXPORT const TextureDescription *textureDescription(QVideoFrameFormat::PixelFormat format); |
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| 62 | |
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| 63 | Q_MULTIMEDIA_EXPORT QString vertexShaderFileName(const QVideoFrameFormat &format); |
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| 64 | Q_MULTIMEDIA_EXPORT QString fragmentShaderFileName(const QVideoFrameFormat &format, QRhiSwapChain::Format surfaceFormat = QRhiSwapChain::SDR); |
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| 65 | Q_MULTIMEDIA_EXPORT void updateUniformData(QByteArray *dst, const QVideoFrameFormat &format, const QVideoFrame &frame, |
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| 66 | const QMatrix4x4 &transform, float opacity, float maxNits = 100); |
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| 67 | Q_MULTIMEDIA_EXPORT std::unique_ptr<QVideoFrameTextures> createTextures(QVideoFrame &frame, QRhi *rhi, QRhiResourceUpdateBatch *rub, std::unique_ptr<QVideoFrameTextures> &&oldTextures); |
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| 68 | |
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| 69 | struct UniformData { |
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| 70 | float transformMatrix[4][4]; |
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| 71 | float colorMatrix[4][4]; |
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| 72 | float opacity; |
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| 73 | float width; |
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| 74 | float masteringWhite; |
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| 75 | float maxLum; |
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| 76 | }; |
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| 77 | |
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| 78 | struct Q_MULTIMEDIA_EXPORT SubtitleLayout |
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| 79 | { |
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| 80 | QSize videoSize; |
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| 81 | QRectF bounds; |
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| 82 | QTextLayout layout; |
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| 83 | |
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| 84 | bool update(const QSize &frameSize, QString text); |
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| 85 | void draw(QPainter *painter, const QPointF &translate) const; |
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| 86 | QImage toImage() const; |
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| 87 | }; |
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| 88 | |
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| 89 | } |
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| 90 | |
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| 91 | QT_END_NAMESPACE |
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| 92 | |
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| 93 | #endif |
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| 94 | |
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