Revision 6ed04040 libavcodec/opt.h

View differences:

libavcodec/opt.h
29 29

  
30 30
#include "libavutil/rational.h"
31 31
#include "avcodec.h"
32

  
33
enum AVOptionType{
34
    FF_OPT_TYPE_FLAGS,
35
    FF_OPT_TYPE_INT,
36
    FF_OPT_TYPE_INT64,
37
    FF_OPT_TYPE_DOUBLE,
38
    FF_OPT_TYPE_FLOAT,
39
    FF_OPT_TYPE_STRING,
40
    FF_OPT_TYPE_RATIONAL,
41
    FF_OPT_TYPE_BINARY,  ///< offset must point to a pointer immediately followed by an int for the length
42
    FF_OPT_TYPE_CONST=128,
43
};
44

  
45
/**
46
 * AVOption
47
 */
48
typedef struct AVOption {
49
    const char *name;
50

  
51
    /**
52
     * short English help text
53
     * @todo What about other languages?
54
     */
55
    const char *help;
56

  
57
    /**
58
     * The offset relative to the context structure where the option
59
     * value is stored. It should be 0 for named constants.
60
     */
61
    int offset;
62
    enum AVOptionType type;
63

  
64
    /**
65
     * the default value for scalar options
66
     */
67
    double default_val;
68
    double min;                 ///< minimum valid value for the option
69
    double max;                 ///< maximum valid value for the option
70

  
71
    int flags;
72
#define AV_OPT_FLAG_ENCODING_PARAM  1   ///< a generic parameter which can be set by the user for muxing or encoding
73
#define AV_OPT_FLAG_DECODING_PARAM  2   ///< a generic parameter which can be set by the user for demuxing or decoding
74
#define AV_OPT_FLAG_METADATA        4   ///< some data extracted or inserted into the file like title, comment, ...
75
#define AV_OPT_FLAG_AUDIO_PARAM     8
76
#define AV_OPT_FLAG_VIDEO_PARAM     16
77
#define AV_OPT_FLAG_SUBTITLE_PARAM  32
78
//FIXME think about enc-audio, ... style flags
79

  
80
    /**
81
     * The logical unit to which the option belongs. Non-constant
82
     * options and corresponding named constants share the same
83
     * unit. May be NULL.
84
     */
85
    const char *unit;
86
} AVOption;
87

  
88
/**
89
 * AVOption2.
90
 * THIS IS NOT PART OF THE API/ABI YET!
91
 * This is identical to AVOption except that default_val was replaced by
92
 * an union, it should be compatible with AVOption on normal platforms.
93
 */
94
typedef struct AVOption2 {
95
    const char *name;
96

  
97
    /**
98
     * short English help text
99
     * @todo What about other languages?
100
     */
101
    const char *help;
102

  
103
    /**
104
     * The offset relative to the context structure where the option
105
     * value is stored. It should be 0 for named constants.
106
     */
107
    int offset;
108
    enum AVOptionType type;
109

  
110
    /**
111
     * the default value for scalar options
112
     */
113
    union {
114
        double dbl;
115
        const char *str;
116
    } default_val;
117

  
118
    double min;                 ///< minimum valid value for the option
119
    double max;                 ///< maximum valid value for the option
120

  
121
    int flags;
122
/*
123
#define AV_OPT_FLAG_ENCODING_PARAM  1   ///< a generic parameter which can be set by the user for muxing or encoding
124
#define AV_OPT_FLAG_DECODING_PARAM  2   ///< a generic parameter which can be set by the user for demuxing or decoding
125
#define AV_OPT_FLAG_METADATA        4   ///< some data extracted or inserted into the file like title, comment, ...
126
#define AV_OPT_FLAG_AUDIO_PARAM     8
127
#define AV_OPT_FLAG_VIDEO_PARAM     16
128
#define AV_OPT_FLAG_SUBTITLE_PARAM  32
129
*/
130
//FIXME think about enc-audio, ... style flags
131

  
132
    /**
133
     * The logical unit to which the option belongs. Non-constant
134
     * options and corresponding named constants share the same
135
     * unit. May be NULL.
136
     */
137
    const char *unit;
138
} AVOption2;
139

  
140

  
141
/**
142
 * Look for an option in obj. Look only for the options which
143
 * have the flags set as specified in mask and flags (that is,
144
 * for which it is the case that opt->flags & mask == flags).
145
 *
146
 * @param[in] obj a pointer to a struct whose first element is a
147
 * pointer to an AVClass
148
 * @param[in] name the name of the option to look for
149
 * @param[in] unit the unit of the option to look for, or any if NULL
150
 * @return a pointer to the option found, or NULL if no option
151
 * has been found
152
 */
153
const AVOption *av_find_opt(void *obj, const char *name, const char *unit, int mask, int flags);
32
#include "libavutil/opt.h"
154 33

  
155 34
#if LIBAVCODEC_VERSION_MAJOR < 53
156 35
/**
......
166 45
 */
167 46
attribute_deprecated const AVOption *av_set_string2(void *obj, const char *name, const char *val, int alloc);
168 47
#endif
169

  
170
/**
171
 * Set the field of obj with the given name to value.
172
 *
173
 * @param[in] obj A struct whose first element is a pointer to an
174
 * AVClass.
175
 * @param[in] name the name of the field to set
176
 * @param[in] val The value to set. If the field is not of a string
177
 * type, then the given string is parsed.
178
 * SI postfixes and some named scalars are supported.
179
 * If the field is of a numeric type, it has to be a numeric or named
180
 * scalar. Behavior with more than one scalar and +- infix operators
181
 * is undefined.
182
 * If the field is of a flags type, it has to be a sequence of numeric
183
 * scalars or named flags separated by '+' or '-'. Prefixing a flag
184
 * with '+' causes it to be set without affecting the other flags;
185
 * similarly, '-' unsets a flag.
186
 * @param[out] o_out if non-NULL put here a pointer to the AVOption
187
 * found
188
 * @param alloc when 1 then the old value will be av_freed() and the
189
 *                     new av_strduped()
190
 *              when 0 then no av_free() nor av_strdup() will be used
191
 * @return 0 if the value has been set, or an AVERROR code in case of
192
 * error:
193
 * AVERROR(ENOENT) if no matching option exists
194
 * AVERROR(ERANGE) if the value is out of range
195
 * AVERROR(EINVAL) if the value is not valid
196
 */
197
int av_set_string3(void *obj, const char *name, const char *val, int alloc, const AVOption **o_out);
198

  
199
const AVOption *av_set_double(void *obj, const char *name, double n);
200
const AVOption *av_set_q(void *obj, const char *name, AVRational n);
201
const AVOption *av_set_int(void *obj, const char *name, int64_t n);
202
double av_get_double(void *obj, const char *name, const AVOption **o_out);
203
AVRational av_get_q(void *obj, const char *name, const AVOption **o_out);
204
int64_t av_get_int(void *obj, const char *name, const AVOption **o_out);
205
const char *av_get_string(void *obj, const char *name, const AVOption **o_out, char *buf, int buf_len);
206
const AVOption *av_next_option(void *obj, const AVOption *last);
207

  
208 48
#if FF_API_OPT_SHOW
209 49
/**
210 50
 * @deprecated Use av_opt_show2() instead.
......
212 52
attribute_deprecated int av_opt_show(void *obj, void *av_log_obj);
213 53
#endif
214 54

  
215
/**
216
 * Show the obj options.
217
 *
218
 * @param req_flags requested flags for the options to show. Show only the
219
 * options for which it is opt->flags & req_flags.
220
 * @param rej_flags rejected flags for the options to show. Show only the
221
 * options for which it is !(opt->flags & req_flags).
222
 * @param av_log_obj log context to use for showing the options
223
 */
224
int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags);
225

  
226
void av_opt_set_defaults(void *s);
227
void av_opt_set_defaults2(void *s, int mask, int flags);
228

  
229 55
#endif /* AVCODEC_OPT_H */

Also available in: Unified diff