/* * AVOptions * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> * * 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 AVOPT_H #define AVOPT_H /** * @file opt.h * AVOptions */ enum AVOptionType{ FF_OPT_TYPE_FLAGS, FF_OPT_TYPE_INT, FF_OPT_TYPE_INT64, FF_OPT_TYPE_DOUBLE, FF_OPT_TYPE_FLOAT, FF_OPT_TYPE_STRING, FF_OPT_TYPE_RATIONAL, FF_OPT_TYPE_CONST=128, }; /** * AVOption. */ typedef struct AVOption { const char *name; /** * short English text help. * @fixme what about other languages */ const char *help; int offset; ///< offset to context structure where the parsed value should be stored enum AVOptionType type; double default_val; double min; double max; int flags; #define AV_OPT_FLAG_ENCODING_PARAM 1 ///< a generic parameter which can be set by the user for muxing or encoding #define AV_OPT_FLAG_DECODING_PARAM 2 ///< a generic parameter which can be set by the user for demuxing or decoding #define AV_OPT_FLAG_METADATA 4 ///< some data extracted or inserted into the file like title, comment, ... #define AV_OPT_FLAG_AUDIO_PARAM 8 #define AV_OPT_FLAG_VIDEO_PARAM 16 #define AV_OPT_FLAG_SUBTITLE_PARAM 32 //FIXME think about enc-audio, ... style flags const char *unit; } AVOption; AVOption *av_set_string(void *obj, const char *name, const char *val); AVOption *av_set_double(void *obj, const char *name, double n); AVOption *av_set_q(void *obj, const char *name, AVRational n); AVOption *av_set_int(void *obj, const char *name, int64_t n); double av_get_double(void *obj, const char *name, AVOption **o_out); AVRational av_get_q(void *obj, const char *name, AVOption **o_out); int64_t av_get_int(void *obj, const char *name, AVOption **o_out); const char *av_get_string(void *obj, const char *name, AVOption **o_out, char *buf, int buf_len); AVOption *av_next_option(void *obj, AVOption *last); int av_opt_show(void *obj, void *av_log_obj); void av_opt_set_defaults(void *s); #endif