Move the texture uploading code into Qt Multimedia

Qt Multimedia has now some generic helper functions to upload
the video data into textures. This way, we can greatly simplify
the rendering code in qtmultimediaquicktools.

Change-Id: I5b0e3eb96cbcf79fe5e9757697f11b0183132b17
Reviewed-by: Doris Verria <doris.verria@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 78 insertions, 0 deletions

diff --git a/src/multimedia/video/qvideotexturehelper_p.h b/src/multimedia/video/qvideotexturehelper_p.h
new file mode 100644
index 000000000..4b369594a
--- /dev/null
+++ b/src/multimedia/video/qvideotexturehelper_p.h
@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QVIDEOTEXTUREHELPER_H
+#define QVIDEOTEXTUREHELPER_H
+
+#include <qvideosurfaceformat.h>
+#include <private/qrhi_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QVideoFrame;
+
+namespace QVideoTextureHelper
+{
+
+struct TextureDescription
+{
+    static constexpr int maxPlanes = 3;
+    struct SizeScale {
+        int x;
+        int y;
+    };
+
+    int nplanes;
+    QRhiTexture::Format textureFormat[maxPlanes];
+    SizeScale sizeScale[maxPlanes];
+};
+
+Q_MULTIMEDIA_EXPORT const TextureDescription *textureDescription(QVideoSurfaceFormat::PixelFormat format);
+
+Q_MULTIMEDIA_EXPORT QString vertexShaderFileName(QVideoSurfaceFormat::PixelFormat format);
+Q_MULTIMEDIA_EXPORT QString fragmentShaderFileName(QVideoSurfaceFormat::PixelFormat format);
+Q_MULTIMEDIA_EXPORT QByteArray uniformData(const QVideoSurfaceFormat &format, const QMatrix4x4 &transform, float opacity);
+Q_MULTIMEDIA_EXPORT int updateRhiTextures(QVideoFrame frame, QRhi *rhi,
+                                           QRhiResourceUpdateBatch *resourceUpdates, QRhiTexture **textures);
+
+}
+
+QT_END_NAMESPACE
+
+#endif