3 * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
40 FF_OPT_TYPE_CONST=128,
46 typedef struct AVOption {
50 * short English text help.
51 * @todo what about other languages
54 int offset; ///< offset to context structure where the parsed value should be stored
55 enum AVOptionType type;
62 #define AV_OPT_FLAG_ENCODING_PARAM 1 ///< a generic parameter which can be set by the user for muxing or encoding
63 #define AV_OPT_FLAG_DECODING_PARAM 2 ///< a generic parameter which can be set by the user for demuxing or decoding
64 #define AV_OPT_FLAG_METADATA 4 ///< some data extracted or inserted into the file like title, comment, ...
65 #define AV_OPT_FLAG_AUDIO_PARAM 8
66 #define AV_OPT_FLAG_VIDEO_PARAM 16
67 #define AV_OPT_FLAG_SUBTITLE_PARAM 32
68 //FIXME think about enc-audio, ... style flags
73 const AVOption *av_find_opt(void *obj, const char *name, const char *unit, int mask, int flags);
74 const AVOption *av_set_string(void *obj, const char *name, const char *val);
75 const AVOption *av_set_double(void *obj, const char *name, double n);
76 const AVOption *av_set_q(void *obj, const char *name, AVRational n);
77 const AVOption *av_set_int(void *obj, const char *name, int64_t n);
78 double av_get_double(void *obj, const char *name, const AVOption **o_out);
79 AVRational av_get_q(void *obj, const char *name, const AVOption **o_out);
80 int64_t av_get_int(void *obj, const char *name, const AVOption **o_out);
81 const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len);
82 const AVOption *av_next_option(void *obj, const AVOption *last);
83 int av_opt_show(void *obj, void *av_log_obj);
84 void av_opt_set_defaults(void *s);
85 void av_opt_set_defaults2(void *s, int mask, int flags);