mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
757cd8d876
Introduce a basic layout, the subpages are currently left empty. Split libavutil in multiple groups as example of the structure
139 lines
4.8 KiB
C
139 lines
4.8 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVUTIL_IMGUTILS_H
|
|
#define AVUTIL_IMGUTILS_H
|
|
|
|
/**
|
|
* @file
|
|
* misc image utilities
|
|
*
|
|
* @addtogroup lavu_picture
|
|
* @{
|
|
*/
|
|
|
|
#include "avutil.h"
|
|
#include "pixdesc.h"
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param 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.
|
|
* @param max_pixstep_comps an array which is filled with the component
|
|
* for each plane which has the max pixel step. May be NULL.
|
|
*/
|
|
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
|
|
const AVPixFmtDescriptor *pixdesc);
|
|
|
|
/**
|
|
* Compute the size of an image line with format pix_fmt and width
|
|
* width for the plane plane.
|
|
*
|
|
* @return the computed size in bytes
|
|
*/
|
|
int av_image_get_linesize(enum PixelFormat pix_fmt, int width, int plane);
|
|
|
|
/**
|
|
* Fill plane linesizes for an image with pixel format pix_fmt and
|
|
* width width.
|
|
*
|
|
* @param linesizes array to be filled with the linesize for each plane
|
|
* @return >= 0 in case of success, a negative error code otherwise
|
|
*/
|
|
int av_image_fill_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width);
|
|
|
|
/**
|
|
* Fill plane data pointers for an image with pixel format pix_fmt and
|
|
* height height.
|
|
*
|
|
* @param data pointers array to be filled with the pointer for each image plane
|
|
* @param ptr the pointer to a buffer which will contain the image
|
|
* @param linesizes the array containing the linesize for each
|
|
* plane, should be filled by av_image_fill_linesizes()
|
|
* @return the size in bytes required for the image buffer, a negative
|
|
* error code in case of failure
|
|
*/
|
|
int av_image_fill_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
|
|
uint8_t *ptr, const int linesizes[4]);
|
|
|
|
/**
|
|
* 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]).
|
|
*
|
|
* @param align the value to use for buffer size alignment
|
|
* @return the size in bytes required for the image buffer, a negative
|
|
* error code in case of failure
|
|
*/
|
|
int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
|
|
int w, int h, enum PixelFormat pix_fmt, int align);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param dst_linesize linesize for the image plane in dst
|
|
* @param src_linesize linesize for the image plane in src
|
|
*/
|
|
void av_image_copy_plane(uint8_t *dst, int dst_linesize,
|
|
const uint8_t *src, int src_linesize,
|
|
int bytewidth, int height);
|
|
|
|
/**
|
|
* Copy image in src_data to dst_data.
|
|
*
|
|
* @param dst_linesizes linesizes for the image in dst_data
|
|
* @param src_linesizes linesizes for the image in src_data
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* Check if the given dimension of an image is valid, meaning that all
|
|
* bytes of the image can be addressed with a signed int.
|
|
*
|
|
* @param w the width of the picture
|
|
* @param h the height of the picture
|
|
* @param log_offset the offset to sum to the log level for logging with log_ctx
|
|
* @param log_ctx the parent logging context, it may be NULL
|
|
* @return >= 0 if valid, a negative error code otherwise
|
|
*/
|
|
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx);
|
|
|
|
int ff_set_systematic_pal2(uint32_t pal[256], enum PixelFormat pix_fmt);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
#endif /* AVUTIL_IMGUTILS_H */
|