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129 lines
4.5 KiB
C
129 lines
4.5 KiB
C
/*
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* GStreamer
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* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VULKAN_FORMAT_H__
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#define __GST_VULKAN_FORMAT_H__
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#include <gst/vulkan/vulkan.h>
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G_BEGIN_DECLS
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typedef struct _GstVulkanFormatInfo GstVulkanFormatInfo;
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/**
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* GST_VULKAN_MAX_COMPONENTS:
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*
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* Since: 1.18
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*/
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#define GST_VULKAN_MAX_COMPONENTS 4
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/**
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* GstVulkanFormatScaling:
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* @GST_VULKAN_FORMAT_SCALING_UNORM: [0, 2^n - 1] -> [0.0, 1.0]
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* @GST_VULKAN_FORMAT_SCALING_SNORM: [-2^(n-1), 2^(n-1) - 1] -> [-1.0, 1.0]
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* @GST_VULKAN_FORMAT_SCALING_USCALED: [0, 2^n - 1] -> [0.0, float(2^n - 1)]
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* @GST_VULKAN_FORMAT_SCALING_SSCALED: [-2^(n-1), 2^(n-1) - 1] -> [float(-2^(n-1)), float(2^(n-1) - 1)]
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* @GST_VULKAN_FORMAT_SCALING_UINT: [0, 2^n - 1] -> [0, 2^n - 1]
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* @GST_VULKAN_FORMAT_SCALING_SINT: [-2^(n-1), 2^(n-1) - 1] -> [-2^(n-1), 2^(n-1) - 1]
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* @GST_VULKAN_FORMAT_SCALING_SRGB: @GST_VULKAN_FORMAT_SCALING_UNORM but the first three components are gamma corrected for the sRGB colour space.
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*
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* Since: 1.18
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*/
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typedef enum
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{
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GST_VULKAN_FORMAT_SCALING_UNORM = 1,
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GST_VULKAN_FORMAT_SCALING_SNORM,
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GST_VULKAN_FORMAT_SCALING_USCALED,
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GST_VULKAN_FORMAT_SCALING_SSCALED,
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GST_VULKAN_FORMAT_SCALING_UINT,
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GST_VULKAN_FORMAT_SCALING_SINT,
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GST_VULKAN_FORMAT_SCALING_SRGB,
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} GstVulkanFormatScaling;
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/**
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* GstVulkanFormatFlags:
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* @GST_VULKAN_FORMAT_FLAG_YUV: is a YUV format
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* @GST_VULKAN_FORMAT_FLAG_RGB: is a RGB format
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* @GST_VULKAN_FORMAT_FLAG_ALPHA: has an alpha channel
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* @GST_VULKAN_FORMAT_FLAG_LE: data is stored in little-endiate byte order
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* @GST_VULKAN_FORMAT_FLAG_COMPLEX: data is stored complex and cannot be read/write only using the information in the #GstVulkanFormatInfo
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*
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* Since: 1.18
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*/
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typedef enum
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{
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GST_VULKAN_FORMAT_FLAG_YUV = (1 << 0),
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GST_VULKAN_FORMAT_FLAG_RGB = (1 << 1),
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GST_VULKAN_FORMAT_FLAG_ALPHA = (1 << 2),
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GST_VULKAN_FORMAT_FLAG_LE = (1 << 3),
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GST_VULKAN_FORMAT_FLAG_COMPLEX = (1 << 4),
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} GstVulkanFormatFlags;
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/**
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* GstVulkanFormatInfo:
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* @format: the Vulkan format being described
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* @name: name of this format
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* @scaling: how raw data is interpreted and scaled
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* @flags: flags that apply to this format
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* @bits: The number of bits used to pack data items. This can be less than
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* 8 when multiple pixels are stored in a byte. for values > 8 multiple
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* bytes should be read according to the endianness flag before
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* applying the shift and mask.
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* @n_components; number of components in this format
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* @shift: the number of bits to shift away to get the component data
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* @depth: the depth in bits for each component
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* @n_planes: the number of planes for this format. The number of planes can
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* be less than the amount of components when multiple components
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* are packed into one plane.
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* @plane: the plane number where a component can be found
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* @poffset: the offset in the plane where the first pixel of the components
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* can be found.
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* @w_sub: subsampling factor of the width for the component.
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* Use GST_VIDEO_SUB_SCALE to scale a width.
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* @h_sub: subsampling factor of the height for the component.
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* Use GST_VIDEO_SUB_SCALE to scale a height.
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*
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* Since: 1.18
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*/
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struct _GstVulkanFormatInfo
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{
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VkFormat format;
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const gchar *name;
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GstVulkanFormatScaling scaling;
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GstVulkanFormatFlags flags;
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guint bits;
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guint n_components;
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guint8 shift[GST_VULKAN_MAX_COMPONENTS];
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guint8 depth[GST_VULKAN_MAX_COMPONENTS];
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gint8 pixel_stride[GST_VULKAN_MAX_COMPONENTS];
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guint n_planes;
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guint8 plane[GST_VULKAN_MAX_COMPONENTS];
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guint8 poffset[GST_VULKAN_MAX_COMPONENTS];
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guint8 w_sub[GST_VULKAN_MAX_COMPONENTS];
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guint8 h_sub[GST_VULKAN_MAX_COMPONENTS];
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};
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GST_VULKAN_API
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const GstVulkanFormatInfo * gst_vulkan_format_get_info (VkFormat format);
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G_END_DECLS
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#endif /* __GST_VULKAN_FORMAT_H__ */
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