switch_image.h File Reference

Describes the vpx image descriptor and associated operations. More...

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Data Structures
struct	vpx_image
	Image Descriptor. More...
struct	vpx_image_rect
	Representation of a rectangle on a surface. More...

Macros
#define	VPX_IMAGE_ABI_VERSION
	Current ABI version number. More...
#define	VPX_IMG_FMT_PLANAR   0x100
#define	VPX_IMG_FMT_UV_FLIP   0x200
#define	VPX_IMG_FMT_HAS_ALPHA   0x400
#define	VPX_IMG_FMT_HIGHBITDEPTH   0x800
#define	VPX_PLANE_PACKED   0
#define	VPX_PLANE_Y   0
#define	VPX_PLANE_U   1
#define	VPX_PLANE_V   2
#define	VPX_PLANE_ALPHA   3

Typedefs
typedef enum vpx_img_fmt	vpx_img_fmt_t
	List of supported image formats. More...
typedef enum vpx_color_space	vpx_color_space_t
	List of supported color spaces. More...
typedef enum vpx_color_range	vpx_color_range_t
	List of supported color range. More...
typedef struct vpx_image	vpx_image_t
	Image Descriptor. More...
typedef struct vpx_image_rect	vpx_image_rect_t
	Representation of a rectangle on a surface. More...

Enumerations
enum	vpx_img_fmt {   VPX_IMG_FMT_NONE, VPX_IMG_FMT_RGB24, VPX_IMG_FMT_RGB32, VPX_IMG_FMT_RGB565,   VPX_IMG_FMT_RGB555, VPX_IMG_FMT_UYVY, VPX_IMG_FMT_YUY2, VPX_IMG_FMT_YVYU,   VPX_IMG_FMT_BGR24, VPX_IMG_FMT_RGB32_LE, VPX_IMG_FMT_ARGB, VPX_IMG_FMT_ARGB_LE,   VPX_IMG_FMT_RGB565_LE, VPX_IMG_FMT_RGB555_LE, VPX_IMG_FMT_YV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 1, VPX_IMG_FMT_I420 = VPX_IMG_FMT_PLANAR | 2,   VPX_IMG_FMT_VPXYV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 3, VPX_IMG_FMT_VPXI420 = VPX_IMG_FMT_PLANAR | 4, VPX_IMG_FMT_I422 = VPX_IMG_FMT_PLANAR | 5, VPX_IMG_FMT_I444 = VPX_IMG_FMT_PLANAR | 6,   VPX_IMG_FMT_I440 = VPX_IMG_FMT_PLANAR | 7, VPX_IMG_FMT_444A = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_HAS_ALPHA | 6, VPX_IMG_FMT_I42016 = VPX_IMG_FMT_I420 | VPX_IMG_FMT_HIGHBITDEPTH, VPX_IMG_FMT_I42216 = VPX_IMG_FMT_I422 | VPX_IMG_FMT_HIGHBITDEPTH,   VPX_IMG_FMT_I44416 = VPX_IMG_FMT_I444 | VPX_IMG_FMT_HIGHBITDEPTH, VPX_IMG_FMT_I44016 = VPX_IMG_FMT_I440 | VPX_IMG_FMT_HIGHBITDEPTH }
	List of supported image formats. More...
enum	vpx_color_space {   VPX_CS_UNKNOWN = 0, VPX_CS_BT_601 = 1, VPX_CS_BT_709 = 2, VPX_CS_SMPTE_170 = 3,   VPX_CS_SMPTE_240 = 4, VPX_CS_BT_2020 = 5, VPX_CS_RESERVED = 6, VPX_CS_SRGB = 7 }
	List of supported color spaces. More...
enum	vpx_color_range { VPX_CR_STUDIO_RANGE = 0, VPX_CR_FULL_RANGE = 1 }
	List of supported color range. More...

Functions
vpx_image_t *	vpx_img_alloc (vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align)
	Open a descriptor, allocating storage for the underlying image. More...
vpx_image_t *	vpx_img_wrap (vpx_image_t *img, vpx_img_fmt_t fmt, unsigned int d_w, unsigned int d_h, unsigned int align, unsigned char *img_data)
	Open a descriptor, using existing storage for the underlying image. More...
int	vpx_img_set_rect (vpx_image_t *img, unsigned int x, unsigned int y, unsigned int w, unsigned int h)
	Set the rectangle identifying the displayed portion of the image. More...
void	vpx_img_flip (vpx_image_t *img)
	Flip the image vertically (top for bottom) More...
void	vpx_img_free (vpx_image_t *img)
	Close an image descriptor. More...

Detailed Description

Describes the vpx image descriptor and associated operations.

Definition in file switch_image.h.

Macro Definition Documentation

#define VPX_IMAGE_ABI_VERSION

Current ABI version number.

Definition at line 31 of file switch_image.h.

#define VPX_IMG_FMT_HAS_ALPHA   0x400

Image has an alpha channel.

Definition at line 36 of file switch_image.h.

#define VPX_IMG_FMT_HIGHBITDEPTH   0x800

Image uses 16bit framebuffer.

Definition at line 37 of file switch_image.h.

#define VPX_IMG_FMT_PLANAR   0x100

Image is a planar format.

Definition at line 34 of file switch_image.h.

#define VPX_IMG_FMT_UV_FLIP   0x200

V plane precedes U in memory.

Definition at line 35 of file switch_image.h.

#define VPX_PLANE_ALPHA   3

A (Transparency) plane

Definition at line 115 of file switch_image.h.

#define VPX_PLANE_PACKED   0

To be used for all packed formats

Definition at line 111 of file switch_image.h.

#define VPX_PLANE_U   1

U (Chroma) plane

Definition at line 113 of file switch_image.h.

#define VPX_PLANE_V   2

V (Chroma) plane

Definition at line 114 of file switch_image.h.

#define VPX_PLANE_Y   0

Y (Luminance) plane

Definition at line 112 of file switch_image.h.

Typedef Documentation

typedef enum vpx_color_range vpx_color_range_t

List of supported color range.

alias for enum vpx_color_range

typedef enum vpx_color_space vpx_color_space_t

List of supported color spaces.

alias for enum vpx_color_space

typedef struct vpx_image_rect vpx_image_rect_t

Representation of a rectangle on a surface.

alias for struct vpx_image_rect

typedef struct vpx_image vpx_image_t

Image Descriptor.

alias for struct vpx_image

typedef enum vpx_img_fmt vpx_img_fmt_t

List of supported image formats.

alias for enum vpx_img_fmt

Enumeration Type Documentation

enum vpx_color_range

List of supported color range.

Enumerator
VPX_CR_STUDIO_RANGE	Y [16..235], UV [16..240]
VPX_CR_FULL_RANGE	YUV/RGB [0..255]

Definition at line 82 of file switch_image.h.

                               {
    VPX_CR_STUDIO_RANGE = 0,    /**< Y [16..235], UV [16..240] */
    VPX_CR_FULL_RANGE   = 1     /**< YUV/RGB [0..255] */
  } vpx_color_range_t; /**< alias for enum vpx_color_range */

enum vpx_color_space

List of supported color spaces.

Enumerator
VPX_CS_UNKNOWN	Unknown
VPX_CS_BT_601	BT.601
VPX_CS_BT_709	BT.709
VPX_CS_SMPTE_170	SMPTE.170
VPX_CS_SMPTE_240	SMPTE.240
VPX_CS_BT_2020	BT.2020
VPX_CS_RESERVED	Reserved
VPX_CS_SRGB	sRGB

Definition at line 70 of file switch_image.h.

                               {
    VPX_CS_UNKNOWN    = 0,  /**< Unknown */
    VPX_CS_BT_601     = 1,  /**< BT.601 */
    VPX_CS_BT_709     = 2,  /**< BT.709 */
    VPX_CS_SMPTE_170  = 3,  /**< SMPTE.170 */
    VPX_CS_SMPTE_240  = 4,  /**< SMPTE.240 */
    VPX_CS_BT_2020    = 5,  /**< BT.2020 */
    VPX_CS_RESERVED   = 6,  /**< Reserved */
    VPX_CS_SRGB       = 7   /**< sRGB */
  } vpx_color_space_t; /**< alias for enum vpx_color_space */

enum vpx_img_fmt

List of supported image formats.

Enumerator
VPX_IMG_FMT_NONE
VPX_IMG_FMT_RGB24	24 bit per pixel packed RGB
VPX_IMG_FMT_RGB32	32 bit per pixel packed 0RGB
VPX_IMG_FMT_RGB565	16 bit per pixel, 565
VPX_IMG_FMT_RGB555	16 bit per pixel, 555
VPX_IMG_FMT_UYVY	UYVY packed YUV
VPX_IMG_FMT_YUY2	YUYV packed YUV
VPX_IMG_FMT_YVYU	YVYU packed YUV
VPX_IMG_FMT_BGR24	24 bit per pixel packed BGR
VPX_IMG_FMT_RGB32_LE	32 bit packed BGR0
VPX_IMG_FMT_ARGB	32 bit packed ARGB, alpha=255
VPX_IMG_FMT_ARGB_LE	32 bit packed BGRA, alpha=255
VPX_IMG_FMT_RGB565_LE	16 bit per pixel, gggbbbbb rrrrrggg
VPX_IMG_FMT_RGB555_LE	16 bit per pixel, gggbbbbb 0rrrrrgg
VPX_IMG_FMT_YV12	planar YVU
VPX_IMG_FMT_I420
VPX_IMG_FMT_VPXYV12
VPX_IMG_FMT_VPXI420	< planar 4:2:0 format with vpx color space
VPX_IMG_FMT_I422
VPX_IMG_FMT_I444
VPX_IMG_FMT_I440
VPX_IMG_FMT_444A
VPX_IMG_FMT_I42016
VPX_IMG_FMT_I42216
VPX_IMG_FMT_I44416
VPX_IMG_FMT_I44016

Definition at line 40 of file switch_image.h.

                           {
    VPX_IMG_FMT_NONE,
    VPX_IMG_FMT_RGB24,   /**< 24 bit per pixel packed RGB */
    VPX_IMG_FMT_RGB32,   /**< 32 bit per pixel packed 0RGB */
    VPX_IMG_FMT_RGB565,  /**< 16 bit per pixel, 565 */
    VPX_IMG_FMT_RGB555,  /**< 16 bit per pixel, 555 */
    VPX_IMG_FMT_UYVY,    /**< UYVY packed YUV */
    VPX_IMG_FMT_YUY2,    /**< YUYV packed YUV */
    VPX_IMG_FMT_YVYU,    /**< YVYU packed YUV */
    VPX_IMG_FMT_BGR24,   /**< 24 bit per pixel packed BGR */
    VPX_IMG_FMT_RGB32_LE, /**< 32 bit packed BGR0 */
    VPX_IMG_FMT_ARGB,     /**< 32 bit packed ARGB, alpha=255 */
    VPX_IMG_FMT_ARGB_LE,  /**< 32 bit packed BGRA, alpha=255 */
    VPX_IMG_FMT_RGB565_LE,  /**< 16 bit per pixel, gggbbbbb rrrrrggg */
    VPX_IMG_FMT_RGB555_LE,  /**< 16 bit per pixel, gggbbbbb 0rrrrrgg */
    VPX_IMG_FMT_YV12    = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 1, /**< planar YVU */
    VPX_IMG_FMT_I420    = VPX_IMG_FMT_PLANAR | 2,
    VPX_IMG_FMT_VPXYV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 3, /** < planar 4:2:0 format with vpx color space */
    VPX_IMG_FMT_VPXI420 = VPX_IMG_FMT_PLANAR | 4,
    VPX_IMG_FMT_I422    = VPX_IMG_FMT_PLANAR | 5,
    VPX_IMG_FMT_I444    = VPX_IMG_FMT_PLANAR | 6,
    VPX_IMG_FMT_I440    = VPX_IMG_FMT_PLANAR | 7,
    VPX_IMG_FMT_444A    = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_HAS_ALPHA | 6,
    VPX_IMG_FMT_I42016    = VPX_IMG_FMT_I420 | VPX_IMG_FMT_HIGHBITDEPTH,
    VPX_IMG_FMT_I42216    = VPX_IMG_FMT_I422 | VPX_IMG_FMT_HIGHBITDEPTH,
    VPX_IMG_FMT_I44416    = VPX_IMG_FMT_I444 | VPX_IMG_FMT_HIGHBITDEPTH,
    VPX_IMG_FMT_I44016    = VPX_IMG_FMT_I440 | VPX_IMG_FMT_HIGHBITDEPTH
  } vpx_img_fmt_t; /**< alias for enum vpx_img_fmt */

Function Documentation

vpx_image_t* vpx_img_alloc	(	vpx_image_t *	img,
		vpx_img_fmt_t	fmt,
		unsigned int	d_w,
		unsigned int	d_h,
		unsigned int	align
	)

Open a descriptor, allocating storage for the underlying image.

Returns a descriptor for storing an image of the given format. The storage for the descriptor is allocated on the heap.

Parameters

[in]	img	Pointer to storage for descriptor. If this parameter is NULL, the storage for the descriptor will be allocated on the heap.
[in]	fmt	Format for the image
[in]	d_w	Width of the image
[in]	d_h	Height of the image
[in]	align	Alignment, in bytes, of the image buffer and each row in the image(stride).

Returns

Returns a pointer to the initialized image descriptor. If the img parameter is non-null, the value of the img parameter will be returned.

Referenced by switch_img_alloc().

void vpx_img_flip

(

vpx_image_t *

img

)

Flip the image vertically (top for bottom)

Adjusts the image descriptor's pointers and strides to make the image be referenced upside-down.

Parameters

[in]

img

Image descriptor

void vpx_img_free

(

vpx_image_t *

img

)

Close an image descriptor.

Frees all allocated storage associated with an image descriptor.

Parameters

[in]

img

Image descriptor

Referenced by switch_img_free().

int vpx_img_set_rect	(	vpx_image_t *	img,
		unsigned int	x,
		unsigned int	y,
		unsigned int	w,
		unsigned int	h
	)

Set the rectangle identifying the displayed portion of the image.

Updates the displayed rectangle (aka viewport) on the image surface to match the specified coordinates and size.

Parameters

[in]	img	Image descriptor
[in]	x	leftmost column
[in]	y	topmost row
[in]	w	width
[in]	h	height

Returns

0 if the requested rectangle is valid, nonzero otherwise.

Referenced by switch_img_set_rect().

vpx_image_t* vpx_img_wrap	(	vpx_image_t *	img,
		vpx_img_fmt_t	fmt,
		unsigned int	d_w,
		unsigned int	d_h,
		unsigned int	align,
		unsigned char *	img_data
	)

Open a descriptor, using existing storage for the underlying image.

Returns a descriptor for storing an image of the given format. The storage for descriptor has been allocated elsewhere, and a descriptor is desired to "wrap" that storage.

Parameters

[in]	img	Pointer to storage for descriptor. If this parameter is NULL, the storage for the descriptor will be allocated on the heap.
[in]	fmt	Format for the image
[in]	d_w	Width of the image
[in]	d_h	Height of the image
[in]	align	Alignment, in bytes, of each row in the image.
[in]	img_data	Storage to use for the image

Returns

Returns a pointer to the initialized image descriptor. If the img parameter is non-null, the value of the img parameter will be returned.

Referenced by switch_img_copy_rect(), switch_img_patch_rect(), and switch_img_wrap().