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https://github.com/FFmpeg/FFmpeg.git
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8ec0832743
This new API stores useful data in a dedicated structure and has clearly delimited init functions. Hopefully, uses of the old API can be replaced quickly.
123 lines
3.9 KiB
C
123 lines
3.9 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFILTER_DRAWUTILS_H
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#define AVFILTER_DRAWUTILS_H
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/**
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* @file
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* misc drawing utilities
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*/
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#include <stdint.h>
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#include "avfilter.h"
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#include "libavutil/pixfmt.h"
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int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt);
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int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w,
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uint8_t dst_color[4],
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enum PixelFormat pix_fmt, uint8_t rgba_color[4],
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int *is_packed_rgba, uint8_t rgba_map[4]);
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void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int pixelstep[4],
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int hsub, int vsub, int x, int y, int w, int h);
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void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int src_linesize[4], int pixelstep[4],
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int hsub, int vsub, int x, int y, int y2, int w, int h);
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#define MAX_PLANES 4
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typedef struct FFDrawContext {
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const struct AVPixFmtDescriptor *desc;
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enum PixelFormat format;
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unsigned nb_planes;
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int pixelstep[MAX_PLANES]; /*< offset between pixels */
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uint8_t hsub[MAX_PLANES]; /*< horizontal subsamling */
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uint8_t vsub[MAX_PLANES]; /*< vertical subsamling */
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uint8_t hsub_max;
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uint8_t vsub_max;
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} FFDrawContext;
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typedef struct FFDrawColor {
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union {
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uint32_t u32;
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uint16_t u16;
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uint8_t u8[4];
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} comp[MAX_PLANES];
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} FFDrawColor;
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/**
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* Init a draw context.
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*
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* Only a limited number of pixel formats are supported, if format is not
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* supported the function will return an error.
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* No flags currently defined.
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* @return 0 for success, < 0 for error
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*/
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int ff_draw_init(FFDrawContext *draw, enum PixelFormat format, unsigned flags);
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/**
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* Prepare a color.
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*/
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void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, uint8_t rgba[4]);
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/**
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* Copy a rectangle from an image to another.
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*
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* The coordinates must be as even as the subsampling requires.
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*/
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void ff_copy_rectangle2(FFDrawContext *draw,
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uint8_t *dst[], int dst_linesize[],
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uint8_t *src[], int src_linesize[],
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int dst_x, int dst_y, int src_x, int src_y,
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int w, int h);
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/**
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* Fill a rectangle with an uniform color.
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*
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* The coordinates must be as even as the subsampling requires.
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* The color needs to be inited with ff_draw_color.
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*/
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void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
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uint8_t *dst[], int dst_linesize[],
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int dst_x, int dst_y, int w, int h);
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/**
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* Round a dimension according to subsampling.
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*
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* @param draw draw context
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* @param sub_dir 0 for horizontal, 1 for vertical
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* @param round_dir 0 nearest, -1 round down, +1 round up
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* @param value value to round
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* @return the rounded value
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*/
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int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
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int value);
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/**
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* Return the list of pixel formats supported by the draw functions.
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*
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* The flags are the same as ff_draw_init, i.e., none currently.
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*/
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AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags);
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#endif /* AVFILTER_DRAWUTILS_H */
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