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