imgutils.c File Reference

misc image utilities More...

#include "avassert.h"
#include "common.h"
#include "imgutils.h"
#include "imgutils_internal.h"
#include "intreadwrite.h"
#include "log.h"
#include "mathematics.h"
#include "mem.h"
#include "pixdesc.h"
#include "rational.h"

Go to the source code of this file.

Data Structures
struct	ImgUtils

Macros
#define	MAX_BLOCK_SIZE   32

Functions
void	av_image_fill_max_pixsteps (int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc)
	Compute the max pixel step for each plane of an image with a format described by pixdesc.
static int	image_get_linesize (int width, int plane, int max_step, int max_step_comp, const AVPixFmtDescriptor *desc)
int	av_image_get_linesize (enum AVPixelFormat pix_fmt, int width, int plane)
	Compute the size of an image line with format pix_fmt and width width for the plane plane.
int	av_image_fill_linesizes (int linesizes[4], enum AVPixelFormat pix_fmt, int width)
	Fill plane linesizes for an image with pixel format pix_fmt and width width.
int	av_image_fill_plane_sizes (size_t sizes[4], enum AVPixelFormat pix_fmt, int height, const ptrdiff_t linesizes[4])
	Fill plane sizes for an image with pixel format pix_fmt and height height.
int	av_image_fill_pointers (uint8_t *data[4], enum AVPixelFormat pix_fmt, int height, uint8_t *ptr, const int linesizes[4])
	Fill plane data pointers for an image with pixel format pix_fmt and height height.
int	avpriv_set_systematic_pal2 (uint32_t pal[256], enum AVPixelFormat pix_fmt)
int	av_image_alloc (uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
	Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordingly.
int	av_image_check_size2 (unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
	Check if the given dimension of an image is valid, meaning that all bytes of a plane of an image with the specified pix_fmt can be addressed with a signed int.
int	av_image_check_size (unsigned int w, unsigned int h, int log_offset, void *log_ctx)
	Check if the given dimension of an image is valid, meaning that all bytes of the image can be addressed with a signed int.
int	av_image_check_sar (unsigned int w, unsigned int h, AVRational sar)
	Check if the given sample aspect ratio of an image is valid.
static void	image_copy_plane (uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)
void	av_image_copy_plane_uc_from (uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)
	Copy image data located in uncacheable (e.g.
void	av_image_copy_plane (uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
	Copy image plane from src to dst.
static void	image_copy (uint8_t *const dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *const src_data[4], const ptrdiff_t src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height, void(*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *, ptrdiff_t, ptrdiff_t, int))
void	av_image_copy (uint8_t *const dst_data[4], const int dst_linesizes[4], const uint8_t *const src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
	Copy image in src_data to dst_data.
void	av_image_copy_uc_from (uint8_t *const dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *const src_data[4], const ptrdiff_t src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
	Copy image data located in uncacheable (e.g.
int	av_image_fill_arrays (uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
	Setup the data pointers and linesizes based on the specified image parameters and the provided array.
int	av_image_get_buffer_size (enum AVPixelFormat pix_fmt, int width, int height, int align)
	Return the size in bytes of the amount of data required to store an image with the given parameters.
int	av_image_copy_to_buffer (uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
	Copy image data from an image into a buffer.
static void	memset_bytes (uint8_t *dst, size_t dst_size, uint8_t *clear, size_t clear_size)
int	av_image_fill_color (uint8_t *const dst_data[4], const ptrdiff_t dst_linesize[4], enum AVPixelFormat pix_fmt, const uint32_t color[4], int width, int height, int flags)
	Overwrite the image data with a color.
int	av_image_fill_black (uint8_t *const dst_data[4], const ptrdiff_t dst_linesize[4], enum AVPixelFormat pix_fmt, enum AVColorRange range, int width, int height)
	Overwrite the image data with black.

Variables
static const AVClass	imgutils_class

Detailed Description

misc image utilities

Definition in file imgutils.c.

Macro Definition Documentation

MAX_BLOCK_SIZE

#define MAX_BLOCK_SIZE   32

Definition at line 580 of file imgutils.c.

Referenced by av_image_fill_color(), check_cavs_qpeldsp(), check_mspel_pixels(), checkasm_check_hpeldsp(), and checkasm_check_qpeldsp().

Function Documentation

image_get_linesize()

static int image_get_linesize ( int width, int plane, int max_step, int max_step_comp, const AVPixFmtDescriptor * desc )

inlinestatic

Definition at line 54 of file imgutils.c.

Referenced by av_image_fill_linesizes(), and av_image_get_linesize().

avpriv_set_systematic_pal2()

int avpriv_set_systematic_pal2	(	uint32_t	pal[256],
		enum AVPixelFormat	pix_fmt )

Definition at line 178 of file imgutils.c.

Referenced by av_image_alloc(), bmp_encode_frame(), ff_frame_pool_get(), gif_encode_init(), pcx_encode_frame(), scale_frame(), and xwd_encode_frame().

image_copy_plane()

static void image_copy_plane ( uint8_t * dst, ptrdiff_t dst_linesize, const uint8_t * src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height )

static

Definition at line 344 of file imgutils.c.

Referenced by av_image_copy(), av_image_copy_plane(), and av_image_copy_plane_uc_from().

image_copy()

static void image_copy ( uint8_t *const dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *const src_data[4], const ptrdiff_t src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height, void(* copy_plane )(uint8_t *, ptrdiff_t, const uint8_t *, ptrdiff_t, ptrdiff_t, int) )

static

Definition at line 381 of file imgutils.c.

Referenced by av_image_copy(), and av_image_copy_uc_from().

memset_bytes()

static void memset_bytes ( uint8_t * dst, size_t dst_size, uint8_t * clear, size_t clear_size )

static

Definition at line 549 of file imgutils.c.

Referenced by av_image_fill_color().

Variable Documentation

imgutils_class

const AVClass imgutils_class

static

Initial value:

= {
    .class_name                = "IMGUTILS",
    .item_name                 = av_default_item_name,
    .option                    = NULL,
    .version                   = LIBAVUTIL_VERSION_INT,
    .log_level_offset_offset   =  0x42 ,
    .parent_log_context_offset =  0x42 ,
}

Definition at line 280 of file imgutils.c.

Referenced by av_image_check_size2().