108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef PIXELSERVICE_H
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#define PIXELSERVICE_H
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#include <QString>
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#include <QOpenGLExtraFunctions>
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#include <OpenImageIO/imageio.h>
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#include "decoder/frame.h"
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#include "pixelformat.h"
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/**
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* @brief A struct of information pertaining to each enum PixelFormat.
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*
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* Primarily this is a means of retrieving OpenGL texture information for different pixel formats/bit depths. Both
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* RAM and VRAM buffers will need a PixelFormat. To keep consistency between the OpenGL code and CPU code when using
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* a given PixelFormat, the PixelFormatInfo struct contains all necessary variables that you'll need to plug into
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* OpenGL.
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*
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* Use the static function PixelService::GetPixelFormatInfo to generate a PixelFormatInfo object.
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*/
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struct PixelFormatInfo {
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QString name;
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GLint internal_format;
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GLenum pixel_format;
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GLenum pixel_type;
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int bytes_per_pixel;
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OIIO::TypeDesc oiio_desc;
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};
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class PixelService : public QObject {
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public:
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PixelService();
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/**
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* @brief Return a PixelFormatInfo containing information for a certain format
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*
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* \see PixelFormatInfo
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*/
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static PixelFormatInfo GetPixelFormatInfo(const olive::PixelFormat& format);
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/**
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* @brief Returns the minimum buffer size (in bytes) necessary for a given format, width, and height.
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*
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* @param format
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*
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* The format of the data the buffer should contain. Must be a member of the olive::PixelFormat enum.
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*
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* @param width
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*
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* The width (in pixels) of the buffer.
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*
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* @param height
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*
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* The height (in pixels) of the buffer.
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*/
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static int GetBufferSize(const olive::PixelFormat &format, const int& width, const int& height);
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/**
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* @brief Returns the number of bytes per pixel for a certain format
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*
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* Different formats use different sizes of data for pixels. Use this function to determine how many bytes a pixel
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* requires for a certain format. The number of bytes will always be a multiple of 4 since all formats use RGBA and
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* are at least 1 bpc.
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*/
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static int BytesPerPixel(const olive::PixelFormat& format);
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/**
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* @brief Returns the number of bytes per channel for a certain format
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*/
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static int BytesPerChannel(const olive::PixelFormat& format);
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/**
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* @brief Convert a frame to a pixel format
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*
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* If the frame's pixel format == the destination format, this just returns `frame`.
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*/
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static FramePtr ConvertPixelFormat(FramePtr frame, const olive::PixelFormat &dest_format);
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/**
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* @brief Convert an RGB image to an RGBA image
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*/
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static void ConvertRGBtoRGBA(FramePtr frame);
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};
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#endif // PIXELSERVICE_H
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