mirror of https://git.ffmpeg.org/ffmpeg.git
125 lines
4.3 KiB
C
125 lines
4.3 KiB
C
/*
|
|
* 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 FFMPEG_OPT_H
|
|
#define FFMPEG_OPT_H
|
|
|
|
/**
|
|
* @file opt.h
|
|
* AVOptions
|
|
*/
|
|
|
|
#include "libavutil/rational.h"
|
|
|
|
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_BINARY, ///< offset must point to a pointer immediately followed by an int for the length
|
|
FF_OPT_TYPE_CONST=128,
|
|
};
|
|
|
|
/**
|
|
* AVOption
|
|
*/
|
|
typedef struct AVOption {
|
|
const char *name;
|
|
|
|
/**
|
|
* short English help text
|
|
* @todo What about other languages?
|
|
*/
|
|
const char *help;
|
|
|
|
/**
|
|
* The offset relative to the context structure where the option
|
|
* value is stored. It should be 0 for named constants.
|
|
*/
|
|
int offset;
|
|
enum AVOptionType type;
|
|
|
|
/**
|
|
* the default value for scalar options
|
|
*/
|
|
double default_val;
|
|
double min; ///< minimum valid value for the option
|
|
double max; ///< maximum valid value for the option
|
|
|
|
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
|
|
|
|
/**
|
|
* The logical unit to which the option belongs. Non-constant
|
|
* options and corresponding named constants share the same
|
|
* unit. May be NULL.
|
|
*/
|
|
const char *unit;
|
|
} AVOption;
|
|
|
|
|
|
/**
|
|
* Looks for an option in \p obj. Looks only for the options which
|
|
* have the flags set as specified in \p mask and \p flags (that is,
|
|
* for which it is the case that opt->flags & mask == flags).
|
|
*
|
|
* @param[in] obj a pointer to a struct whose first element is a
|
|
* pointer to an #AVClass
|
|
* @param[in] name the name of the option to look for
|
|
* @param[in] unit the unit of the option to look for, or any if NULL
|
|
* @return a pointer to the option found, or NULL if no option
|
|
* has been found
|
|
*/
|
|
const AVOption *av_find_opt(void *obj, const char *name, const char *unit, int mask, int flags);
|
|
|
|
attribute_deprecated const AVOption *av_set_string(void *obj, const char *name, const char *val);
|
|
|
|
/**
|
|
* Sets the field of obj with the given name to value.
|
|
* @param alloc when 1 then the old value will be av_freed() and the
|
|
* new av_strduped()
|
|
* when 0 then no av_free() nor av_strdup() will be used
|
|
*/
|
|
const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc);
|
|
|
|
const AVOption *av_set_double(void *obj, const char *name, double n);
|
|
const AVOption *av_set_q(void *obj, const char *name, AVRational n);
|
|
const AVOption *av_set_int(void *obj, const char *name, int64_t n);
|
|
double av_get_double(void *obj, const char *name, const AVOption **o_out);
|
|
AVRational av_get_q(void *obj, const char *name, const AVOption **o_out);
|
|
int64_t av_get_int(void *obj, const char *name, const AVOption **o_out);
|
|
const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len);
|
|
const AVOption *av_next_option(void *obj, const AVOption *last);
|
|
int av_opt_show(void *obj, void *av_log_obj);
|
|
void av_opt_set_defaults(void *s);
|
|
void av_opt_set_defaults2(void *s, int mask, int flags);
|
|
|
|
#endif /* FFMPEG_OPT_H */
|