+++ /dev/null
-/*
- * 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
- *
- * @addtogroup lavu_picture
- * @{
- */
-
-#include "avutil.h"
-#include "pixdesc.h"
-#include "rational.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 AVPixelFormat 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 AVPixelFormat 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 AVPixelFormat 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 AVPixelFormat 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.
- *
- * bytewidth must be contained by both absolute values of dst_linesize
- * and src_linesize, otherwise the function behavior is undefined.
- *
- * @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 AVPixelFormat pix_fmt, int width, int height);
-
-/**
- * Setup the data pointers and linesizes based on the specified image
- * parameters and the provided array.
- *
- * The fields of the given image are filled in by using the src
- * address which points to the image data buffer. Depending on the
- * specified pixel format, one or multiple image data pointers and
- * line sizes will be set. If a planar format is specified, several
- * pointers will be set pointing to the different picture planes and
- * the line sizes of the different planes will be stored in the
- * lines_sizes array. Call with src == NULL to get the required
- * size for the src buffer.
- *
- * To allocate the buffer and fill in the dst_data and dst_linesize in
- * one call, use av_image_alloc().
- *
- * @param dst_data data pointers to be filled in
- * @param dst_linesizes linesizes for the image in dst_data to be filled in
- * @param src buffer which will contain or contains the actual image data, can be NULL
- * @param pix_fmt the pixel format of the image
- * @param width the width of the image in pixels
- * @param height the height of the image in pixels
- * @param align the value used in src for linesize alignment
- * @return the size in bytes required for src, a negative error code
- * in case of failure
- */
-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);
-
-/**
- * Return the size in bytes of the amount of data required to store an
- * image with the given parameters.
- *
- * @param[in] align the assumed linesize alignment
- */
-int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align);
-
-/**
- * Copy image data from an image into a buffer.
- *
- * av_image_get_buffer_size() can be used to compute the required size
- * for the buffer to fill.
- *
- * @param dst a buffer into which picture data will be copied
- * @param dst_size the size in bytes of dst
- * @param src_data pointers containing the source image data
- * @param src_linesizes linesizes for the image in src_data
- * @param pix_fmt the pixel format of the source image
- * @param width the width of the source image in pixels
- * @param height the height of the source image in pixels
- * @param align the assumed linesize alignment for dst
- * @return the number of bytes written to dst, or a negative value
- * (error code) on error
- */
-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);
-
-/**
- * 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);
-
-/**
- * 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 max_pixels the maximum number of pixels the user wants to accept
- * @param pix_fmt the pixel format, can be AV_PIX_FMT_NONE if unknown.
- * @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_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 sample aspect ratio of an image is valid.
- *
- * It is considered invalid if the denominator is 0 or if applying the ratio
- * to the image size would make the smaller dimension less than 1. If the
- * sar numerator is 0, it is considered unknown and will return as valid.
- *
- * @param w width of the image
- * @param h height of the image
- * @param sar sample aspect ratio of the image
- * @return 0 if valid, a negative AVERROR code otherwise
- */
-int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar);
-
-/**
- * @}
- */
-
-
-#endif /* AVUTIL_IMGUTILS_H */
projects / rtmpclient.git / blobdiff