misc image utilities More...
#include "avutil.h"
#include "pixdesc.h"
Go to the source code of this file.
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. | |
int | av_image_get_linesize (enum PixelFormat 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 PixelFormat pix_fmt, int width) |
Fill plane linesizes for an image with pixel format pix_fmt and width width. | |
int | av_image_fill_pointers (uint8_t *data[4], enum PixelFormat 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 | av_image_alloc (uint8_t *pointers[4], int linesizes[4], int w, int h, enum PixelFormat pix_fmt, int align) |
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordingly. | |
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. | |
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 PixelFormat pix_fmt, int width, int height) |
Copy image in src_data to dst_data. | |
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 | ff_set_systematic_pal2 (uint32_t pal[256], enum PixelFormat pix_fmt) |
attribute_deprecated void | av_fill_image_max_pixsteps (int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc) |
attribute_deprecated int | av_get_image_linesize (enum PixelFormat pix_fmt, int width, int plane) |
attribute_deprecated int | av_fill_image_linesizes (int linesizes[4], enum PixelFormat pix_fmt, int width) |
attribute_deprecated int | av_fill_image_pointers (uint8_t *data[4], enum PixelFormat pix_fmt, int height, uint8_t *ptr, const int linesizes[4]) |
attribute_deprecated int | av_check_image_size (unsigned int w, unsigned int h, int log_offset, void *log_ctx) |
misc image utilities
Definition in file imgutils.h.
attribute_deprecated int av_check_image_size | ( | unsigned int | w, | |
unsigned int | h, | |||
int | log_offset, | |||
void * | log_ctx | |||
) |
Definition at line 301 of file imgutils.c.
attribute_deprecated int av_fill_image_linesizes | ( | int | linesizes[4], | |
enum PixelFormat | pix_fmt, | |||
int | width | |||
) |
Definition at line 290 of file imgutils.c.
attribute_deprecated void av_fill_image_max_pixsteps | ( | int | max_pixsteps[4], | |
int | max_pixstep_comps[4], | |||
const AVPixFmtDescriptor * | pixdesc | |||
) |
Definition at line 279 of file imgutils.c.
attribute_deprecated int av_fill_image_pointers | ( | uint8_t * | data[4], | |
enum PixelFormat | pix_fmt, | |||
int | height, | |||
uint8_t * | ptr, | |||
const int | linesizes[4] | |||
) |
Definition at line 295 of file imgutils.c.
attribute_deprecated int av_get_image_linesize | ( | enum PixelFormat | pix_fmt, | |
int | width, | |||
int | plane | |||
) |
Definition at line 285 of file imgutils.c.
int av_image_alloc | ( | uint8_t * | pointers[4], | |
int | linesizes[4], | |||
int | w, | |||
int | h, | |||
enum PixelFormat | pix_fmt, | |||
int | align | |||
) |
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordingly.
The allocated image buffer has to be freed by using av_freep(&pointers[0]).
align | the value to use for buffer size alignment |
Definition at line 183 of file imgutils.c.
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.
w | the width of the picture | |
h | the height of the picture | |
log_offset | the offset to sum to the log level for logging with log_ctx | |
log_ctx | the parent logging context, it may be NULL |
Definition at line 220 of file imgutils.c.
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 PixelFormat | pix_fmt, | |||
int | width, | |||
int | height | |||
) |
Copy image in src_data to dst_data.
dst_linesize | linesizes for the image in dst_data | |
src_linesize | linesizes for the image in src_data |
Definition at line 244 of file imgutils.c.
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.
That is, copy "height" number of lines of "bytewidth" bytes each. The first byte of each successive line is separated by *_linesize bytes.
dst_linesize | linesize for the image plane in dst | |
src_linesize | linesize for the image plane in src |
Definition at line 231 of file imgutils.c.
int av_image_fill_linesizes | ( | int | linesizes[4], | |
enum PixelFormat | pix_fmt, | |||
int | width | |||
) |
Fill plane linesizes for an image with pixel format pix_fmt and width width.
linesizes | array to be filled with the linesize for each plane |
Definition at line 78 of file imgutils.c.
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.
The pixel step is the distance in bytes between the first byte of the group of bytes which describe a pixel component and the first byte of the successive group in the same plane for the same component.
max_pixsteps | an array which is filled with the max pixel step for each plane. Since a plane may contain different pixel components, the computed max_pixsteps[plane] is relative to the component in the plane with the max pixel step. | |
max_pixstep_comps | an array which is filled with the component for each plane which has the max pixel step. May be NULL. |
Definition at line 28 of file imgutils.c.
int av_image_fill_pointers | ( | uint8_t * | data[4], | |
enum PixelFormat | 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.
data | pointers array to be filled with the pointer for each image plane | |
ptr | the pointer to a buffer which will contain the image | |
linesizes | the array containing the linesize for each plane, should be filled by av_image_fill_linesizes() |
Definition at line 100 of file imgutils.c.
int av_image_get_linesize | ( | enum PixelFormat | pix_fmt, | |
int | width, | |||
int | plane | |||
) |
Compute the size of an image line with format pix_fmt and width width for the plane plane.
Definition at line 65 of file imgutils.c.
int ff_set_systematic_pal2 | ( | uint32_t | pal[256], | |
enum PixelFormat | pix_fmt | |||
) |
Definition at line 143 of file imgutils.c.