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- /*
- * This file is part of FFmpeg.
- *
- * FFmpeg 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.
- *
- * FFmpeg 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 FFmpeg; 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
- */
- #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_linesize linesizes for the image in dst_data
- * @param src_linesize 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 */
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