mirror of
https://github.com/mpv-player/mpv
synced 2024-12-20 13:52:10 +00:00
9b5a98676d
The use of filters prior to PNG compression can greatly improve compression ratio, with "mixed" (ImageMagick calls it "adaptive") typically achieving the best results.
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*
|
|
* This file is part of mplayer.
|
|
*
|
|
* mplayer is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* mplayer 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with mplayer. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
struct mp_image;
|
|
struct mp_csp_details;
|
|
|
|
struct image_writer_opts {
|
|
char *format;
|
|
int png_compression;
|
|
int png_filter;
|
|
int jpeg_quality;
|
|
int jpeg_optimize;
|
|
int jpeg_smooth;
|
|
int jpeg_dpi;
|
|
int jpeg_progressive;
|
|
int jpeg_baseline;
|
|
};
|
|
|
|
extern const struct image_writer_opts image_writer_opts_defaults;
|
|
|
|
extern const struct m_sub_options image_writer_conf;
|
|
|
|
// Return the file extension that will be used, e.g. "png".
|
|
const char *image_writer_file_ext(const struct image_writer_opts *opts);
|
|
|
|
/*
|
|
* Save the given image under the given filename. The parameters csp and opts
|
|
* are optional. All pixel formats supported by swscale are supported.
|
|
*
|
|
* File format and compression settings are controlled via the opts parameter.
|
|
*
|
|
* NOTE: The fields w/h/width/height of the passed mp_image must be all set
|
|
* accordingly. Setting w and width or h and height to different values
|
|
* can be used to store snapshots of anamorphic video.
|
|
*/
|
|
int write_image(struct mp_image *image, const struct image_writer_opts *opts,
|
|
const char *filename);
|
|
|
|
// Debugging helper.
|
|
void dump_png(struct mp_image *image, const char *filename);
|