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imgutils.c File Reference

misc image utilities More...

#include "avassert.h"
#include "common.h"
#include "imgutils.h"
#include "imgutils_internal.h"
#include "internal.h"
#include "intreadwrite.h"
#include "log.h"
#include "mathematics.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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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 void 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)
 
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. More...
 
static void image_copy (uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *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 *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
 Copy image in src_data to dst_data. More...
 
void av_image_copy_uc_from (uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *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. More...
 
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. More...
 
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. More...
 
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. More...
 
static void memset_bytes (uint8_t *dst, size_t dst_size, uint8_t *clear, size_t clear_size)
 
int av_image_fill_black (uint8_t *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. More...
 

Variables

static const AVClass imgutils_class
 

Detailed Description

misc image utilities

Definition in file imgutils.c.

Macro Definition Documentation

#define MAX_BLOCK_SIZE   32

Definition at line 549 of file imgutils.c.

Referenced by av_image_fill_black().

Function Documentation

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().

int avpriv_set_systematic_pal2 ( uint32_t  pal[256],
enum AVPixelFormat  pix_fmt 
)
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 308 of file imgutils.c.

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

static void 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 
)
static

Definition at line 323 of file imgutils.c.

Referenced by av_image_copy_uc_from().

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

Definition at line 345 of file imgutils.c.

Referenced by av_image_copy(), and av_image_copy_uc_from().

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

Definition at line 500 of file imgutils.c.

Referenced by av_image_fill_black().

Variable Documentation

const AVClass imgutils_class
static
Initial value:
= {
.class_name = "IMGUTILS",
.item_name = av_default_item_name,
.option = NULL,
.log_level_offset_offset = 0x42,
.parent_log_context_offset = 0x42,
}
#define NULL
Definition: coverity.c:32
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:193

Definition at line 244 of file imgutils.c.

Referenced by av_image_check_size2().