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mpv/options/m_option.h

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPLAYER_M_OPTION_H
#define MPLAYER_M_OPTION_H
#include <string.h>
#include <stddef.h>
#include <stdbool.h>
#include "misc/bstr.h"
#include "audio/chmap.h"
// m_option allows to parse, print and copy data of various types.
typedef struct m_option_type m_option_type_t;
typedef struct m_option m_option_t;
struct m_config;
struct mp_log;
struct mpv_node;
///////////////////////////// Options types declarations ////////////////////
// Simple types
extern const m_option_type_t m_option_type_flag;
extern const m_option_type_t m_option_type_store;
extern const m_option_type_t m_option_type_float_store;
extern const m_option_type_t m_option_type_int;
extern const m_option_type_t m_option_type_int64;
extern const m_option_type_t m_option_type_intpair;
extern const m_option_type_t m_option_type_float;
extern const m_option_type_t m_option_type_double;
extern const m_option_type_t m_option_type_string;
extern const m_option_type_t m_option_type_string_list;
extern const m_option_type_t m_option_type_string_append_list;
extern const m_option_type_t m_option_type_keyvalue_list;
extern const m_option_type_t m_option_type_time;
extern const m_option_type_t m_option_type_rel_time;
extern const m_option_type_t m_option_type_choice;
extern const m_option_type_t m_option_type_msglevels;
extern const m_option_type_t m_option_type_print_fn;
extern const m_option_type_t m_option_type_subconfig;
extern const m_option_type_t m_option_type_imgfmt;
extern const m_option_type_t m_option_vid_stereo_mode;
extern const m_option_type_t m_option_type_fourcc;
extern const m_option_type_t m_option_type_afmt;
extern const m_option_type_t m_option_type_color;
extern const m_option_type_t m_option_type_geometry;
extern const m_option_type_t m_option_type_size_box;
extern const m_option_type_t m_option_type_chmap;
extern const m_option_type_t m_option_type_node;
// Used internally by m_config.c
extern const m_option_type_t m_option_type_alias;
extern const m_option_type_t m_option_type_removed;
// Callback used by m_option_type_print_fn options.
typedef void (*m_opt_print_fn)(struct mp_log *log);
enum m_rel_time_type {
REL_TIME_NONE,
REL_TIME_ABSOLUTE,
REL_TIME_RELATIVE,
REL_TIME_PERCENT,
REL_TIME_CHAPTER,
};
struct m_rel_time {
double pos;
enum m_rel_time_type type;
};
struct m_color {
uint8_t r, g, b, a;
};
struct m_geometry {
int x, y, w, h;
bool xy_valid : 1, wh_valid : 1;
bool w_per : 1, h_per : 1;
bool x_sign : 1, y_sign : 1, x_per : 1, y_per : 1;
};
void m_geometry_apply(int *xpos, int *ypos, int *widw, int *widh,
int scrw, int scrh, struct m_geometry *gm);
struct m_obj_desc {
// Name which will be used in the option string
const char *name;
// Will be printed when "help" is passed
const char *description;
// Size of the private struct
int priv_size;
// If not NULL, default values for private struct
const void *priv_defaults;
// Options which refer to members in the private struct
const struct m_option *options;
// For free use by the implementer of m_obj_list.get_desc
const void *p;
// If not NULL, options which should be set before applying other options.
// This member is usually set by m_obj_list_find() only, and read by the
// option parser. It's not used anywhere else.
const char *init_options;
// Don't list entry with "help"
bool hidden;
// Callback to print custom help if "help" is passed
void (*print_help)(struct mp_log *log);
// Set by m_obj_list_find(). If the requested name is an old alias, this
// is set to the old name (while the name field uses the new name).
const char *replaced_name;
};
// Extra definition needed for \ref m_option_type_obj_settings_list options.
struct m_obj_list {
bool (*get_desc)(struct m_obj_desc *dst, int index);
const char *description;
// Can be set to a NULL terminated array of aliases
const char *aliases[4][5];
// Allow a trailing ",", which adds an entry with name=""
bool allow_trailer;
// Allow unknown entries, for which a dummy entry is inserted, and whose
// options are skipped and ignored.
bool allow_unknown_entries;
};
// Find entry by name
bool m_obj_list_find(struct m_obj_desc *dst, const struct m_obj_list *list,
bstr name);
// The data type used by \ref m_option_type_obj_settings_list.
typedef struct m_obj_settings {
// Type of the object.
char *name;
// Optional user-defined name.
char *label;
// NULL terminated array of parameter/value pairs.
char **attribs;
} m_obj_settings_t;
// A parser to set up a list of objects.
/** It creates a NULL terminated array \ref m_obj_settings. The option priv
* field (\ref m_option::priv) must point to a \ref m_obj_list_t describing
* the available object types.
*/
extern const m_option_type_t m_option_type_obj_settings_list;
struct m_opt_choice_alternatives {
char *name;
int value;
};
// For OPT_STRING_VALIDATE(). Behaves like m_option_type.parse().
typedef int (*m_opt_string_validate_fn)(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param);
// m_option.priv points to this if OPT_SUBSTRUCT is used
struct m_sub_options {
const struct m_option *opts;
size_t size;
const void *defaults;
};
#define CONF_TYPE_FLAG (&m_option_type_flag)
#define CONF_TYPE_STORE (&m_option_type_store)
#define CONF_TYPE_INT (&m_option_type_int)
#define CONF_TYPE_INT64 (&m_option_type_int64)
#define CONF_TYPE_FLOAT (&m_option_type_float)
#define CONF_TYPE_DOUBLE (&m_option_type_double)
#define CONF_TYPE_STRING (&m_option_type_string)
#define CONF_TYPE_STRING_LIST (&m_option_type_string_list)
#define CONF_TYPE_IMGFMT (&m_option_type_imgfmt)
#define CONF_TYPE_FOURCC (&m_option_type_fourcc)
#define CONF_TYPE_AFMT (&m_option_type_afmt)
#define CONF_TYPE_OBJ_SETTINGS_LIST (&m_option_type_obj_settings_list)
#define CONF_TYPE_TIME (&m_option_type_time)
#define CONF_TYPE_CHOICE (&m_option_type_choice)
#define CONF_TYPE_INT_PAIR (&m_option_type_intpair)
#define CONF_TYPE_NODE (&m_option_type_node)
// Possible option values. Code is allowed to access option data without going
// through this union. It serves for self-documentation and to get minimal
// size/alignment requirements for option values in general.
union m_option_value {
int flag; // not the C type "bool"!
int store;
float float_store;
int int_;
int64_t int64;
int intpair[2];
float float_;
double double_;
char *string;
char **string_list;
char **keyvalue_list;
int imgfmt;
unsigned int fourcc;
int afmt;
m_obj_settings_t *obj_settings_list;
double time;
struct m_rel_time rel_time;
struct m_color color;
struct m_geometry geometry;
struct m_geometry size_box;
struct mp_chmap chmap;
};
////////////////////////////////////////////////////////////////////////////
// Option type description
struct m_option_type {
const char *name;
// Size needed for the data.
unsigned int size;
// One of M_OPT_TYPE*.
unsigned int flags;
// Parse the data from a string.
/** It is the only required function, all others can be NULL.
*
* \param log for outputting parser error or help messages
* \param opt The option that is parsed.
* \param name The full option name.
* \param param The parameter to parse.
* may not be an argument meant for this option
* \param dst Pointer to the memory where the data should be written.
* If NULL the parameter validity should still be checked.
* \return On error a negative value is returned, on success the number
* of arguments consumed. For details see \ref OptionParserReturn.
*/
int (*parse)(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param, void *dst);
// Print back a value in string form.
/** \param opt The option to print.
* \param val Pointer to the memory holding the data to be printed.
* \return An allocated string containing the text value or (void*)-1
* on error.
*/
char *(*print)(const m_option_t *opt, const void *val);
// Print the value in a human readable form. Unlike print(), it doesn't
// necessarily return the exact value, and is generally not parseable with
// parse().
char *(*pretty_print)(const m_option_t *opt, const void *val);
// Copy data between two locations. Deep copy if the data has pointers.
// The implementation must free *dst if memory allocation is involved.
/** \param opt The option to copy.
* \param dst Pointer to the destination memory.
* \param src Pointer to the source memory.
*/
void (*copy)(const m_option_t *opt, void *dst, const void *src);
// Free the data allocated for a save slot.
/** This is only needed for dynamic types like strings.
* \param dst Pointer to the data, usually a pointer that should be freed and
* set to NULL.
*/
void (*free)(void *dst);
// Add the value add to the value in val. For types that are not numeric,
// add gives merely the direction. The wrap parameter determines whether
// the value is clipped, or wraps around to the opposite max/min.
void (*add)(const m_option_t *opt, void *val, double add, bool wrap);
// Multiply the value with the factor f. The callback must clip the result
// to the valid value range of the option.
void (*multiply)(const m_option_t *opt, void *val, double f);
// Clamp the value in val to the option's valid value range.
// Return values:
// M_OPT_OUT_OF_RANGE: val was invalid, and modified (clamped) to be valid
// M_OPT_INVALID: val was invalid, and can't be made valid
// 0: val was already valid and is unchanged
int (*clamp)(const m_option_t *opt, void *val);
// Set the option value in dst to the contents of src.
// (If the option is dynamic, the old value in *dst has to be freed.)
// Return values:
// M_OPT_UNKNOWN: src is in an unknown format
// M_OPT_INVALID: src is incorrectly formatted
// >= 0: success
// other error code: some other error, essentially M_OPT_INVALID refined
int (*set)(const m_option_t *opt, void *dst, struct mpv_node *src);
// Copy the option value in src to dst. Use ta_parent for any dynamic
// memory allocations. It's explicitly allowed to have mpv_node reference
// static strings (and even mpv_node_list.keys), though.
int (*get)(const m_option_t *opt, void *ta_parent, struct mpv_node *dst,
void *src);
};
// Option description
struct m_option {
// Option name.
const char *name;
// Option type.
const m_option_type_t *type;
// See \ref OptionFlags.
unsigned int flags;
int offset;
// \brief Mostly useful for numeric types, the \ref M_OPT_MIN flags must
// also be set.
double min;
// \brief Mostly useful for numeric types, the \ref M_OPT_MAX flags must
// also be set.
double max;
// Type dependent data (for all kinds of extended settings).
void *priv;
// Initialize variable to given default before parsing options
const void *defval;
};
// The option has a minimum set in \ref m_option::min.
#define M_OPT_MIN (1 << 0)
// The option has a maximum set in \ref m_option::max.
#define M_OPT_MAX (1 << 1)
// The option has a minimum and maximum in m_option::min and m_option::max.
#define M_OPT_RANGE (M_OPT_MIN | M_OPT_MAX)
// The option is forbidden in config files.
#define M_OPT_NOCFG (1 << 2)
// This option can't be set per-file when used with struct m_config.
#define M_OPT_GLOBAL (1 << 4)
// Can not be freely changed at runtime (normally, all options can be changed,
// even if the settings don't get effective immediately). Note that an option
// might still change even if this is set, e.g. via properties or per-file
// options.
#define M_OPT_FIXED (1 << 5)
// The option should be set during command line pre-parsing
#define M_OPT_PRE_PARSE (1 << 6)
// See M_OPT_TYPE_OPTIONAL_PARAM.
#define M_OPT_OPTIONAL_PARAM (1 << 10)
// The option expects a file name (or a list of file names)
#define M_OPT_FILE (1 << 11)
// These are kept for compatibility with older code.
#define CONF_MIN M_OPT_MIN
#define CONF_MAX M_OPT_MAX
#define CONF_RANGE M_OPT_RANGE
#define CONF_NOCFG M_OPT_NOCFG
#define CONF_GLOBAL (M_OPT_GLOBAL | M_OPT_FIXED)
#define CONF_PRE_PARSE M_OPT_PRE_PARSE
// These flags are used to describe special parser capabilities or behavior.
// Suboption parser flag.
/** When this flag is set, m_option::p should point to another m_option
* array. Only the parse function will be called. If dst is set, it should
* create/update an array of char* containg opt/val pairs. The options in
* the child array will then be set automatically by the \ref Config.
* Also note that suboptions may be directly accessed by using
* -option:subopt blah.
*/
#define M_OPT_TYPE_HAS_CHILD (1 << 0)
// Wildcard matching flag.
/** If set the option type has a use for option names ending with a *
* (used for -aa*), this only affects the option name matching.
*/
#define M_OPT_TYPE_ALLOW_WILDCARD (1 << 1)
// Dynamic data type.
/** This flag indicates that the data is dynamically allocated (m_option::p
* points to a pointer). It enables a little hack in the \ref Config wich
* replaces the initial value of such variables with a dynamic copy in case
* the initial value is statically allocated (pretty common with strings).
*/
#define M_OPT_TYPE_DYNAMIC (1 << 2)
// The parameter is optional and by default no parameter is preferred. If
// ambiguous syntax is used ("--opt value"), the command line parser will
// assume that the argument takes no parameter. In config files, these
// options can be used without "=" and value.
#define M_OPT_TYPE_OPTIONAL_PARAM (1 << 3)
///////////////////////////// Parser flags /////////////////////////////////
// OptionParserReturn
//
// On success parsers return a number >= 0.
//
// To indicate that MPlayer should exit without playing anything,
// parsers return M_OPT_EXIT minus the number of parameters they
// consumed: \ref M_OPT_EXIT or \ref M_OPT_EXIT-1.
//
// On error one of the following (negative) error codes is returned:
// For use by higher level APIs when the option name is invalid.
#define M_OPT_UNKNOWN -1
// Returned when a parameter is needed but wasn't provided.
#define M_OPT_MISSING_PARAM -2
// Returned when the given parameter couldn't be parsed.
#define M_OPT_INVALID -3
// Returned if the value is "out of range". The exact meaning may
// vary from type to type.
#define M_OPT_OUT_OF_RANGE -4
// The option doesn't take a parameter.
#define M_OPT_DISALLOW_PARAM -5
// Returned if the parser failed for any other reason than a bad parameter.
#define M_OPT_PARSER_ERR -6
// Returned when MPlayer should exit. Used by various help stuff.
/** M_OPT_EXIT must be the lowest number on this list.
*/
#define M_OPT_EXIT -7
char *m_option_strerror(int code);
// Find the option matching the given name in the list.
/** \ingroup Options
* This function takes the possible wildcards into account (see
* \ref M_OPT_TYPE_ALLOW_WILDCARD).
*
* \param list Pointer to an array of \ref m_option.
* \param name Name of the option.
* \return The matching option or NULL.
*/
const m_option_t *m_option_list_find(const m_option_t *list, const char *name);
// Helper to parse options, see \ref m_option_type::parse.
static inline int m_option_parse(struct mp_log *log, const m_option_t *opt,
struct bstr name, struct bstr param, void *dst)
{
return opt->type->parse(log, opt, name, param, dst);
}
// Helper to print options, see \ref m_option_type::print.
static inline char *m_option_print(const m_option_t *opt, const void *val_ptr)
{
if (opt->type->print)
return opt->type->print(opt, val_ptr);
else
return NULL;
}
static inline char *m_option_pretty_print(const m_option_t *opt,
const void *val_ptr)
{
if (opt->type->pretty_print)
return opt->type->pretty_print(opt, val_ptr);
else
return m_option_print(opt, val_ptr);
}
// Helper around \ref m_option_type::copy.
static inline void m_option_copy(const m_option_t *opt, void *dst,
const void *src)
{
if (opt->type->copy)
opt->type->copy(opt, dst, src);
}
// Helper around \ref m_option_type::free.
static inline void m_option_free(const m_option_t *opt, void *dst)
{
if (opt->type->free)
opt->type->free(dst);
}
// see m_option_type.set
static inline int m_option_set_node(const m_option_t *opt, void *dst,
struct mpv_node *src)
{
if (opt->type->set)
return opt->type->set(opt, dst, src);
return M_OPT_UNKNOWN;
}
// see m_option_type.get
static inline int m_option_get_node(const m_option_t *opt, void *ta_parent,
struct mpv_node *dst, void *src)
{
if (opt->type->get)
return opt->type->get(opt, ta_parent, dst, src);
return M_OPT_UNKNOWN;
}
int m_option_required_params(const m_option_t *opt);
extern const char m_option_path_separator;
// Cause a compilation warning if typeof(expr) != type.
// Should be used with pointer types only.
#define MP_EXPECT_TYPE(type, expr) (0 ? (type)0 : (expr))
// This behaves like offsetof(type, member), but will cause a compilation
// warning if typeof(member) != expected_member_type.
// It uses some trickery to make it compile as expression.
#define MP_CHECKED_OFFSETOF(type, member, expected_member_type) \
(offsetof(type, member) + (0 && MP_EXPECT_TYPE(expected_member_type*, \
&((type*)0)->member)))
#define OPTION_LIST_SEPARATOR ','
#define OPTDEF_STR(s) .defval = (void *)&(char * const){s}
#define OPTDEF_INT(i) .defval = (void *)&(const int){i}
#define OPTDEF_FLOAT(f) .defval = (void *)&(const float){f}
#define OPTDEF_DOUBLE(d) .defval = (void *)&(const double){d}
#define OPT_GENERAL(ctype, optname, varname, flagv, ...) \
{.name = optname, .flags = flagv, \
.offset = MP_CHECKED_OFFSETOF(OPT_BASE_STRUCT, varname, ctype), \
__VA_ARGS__}
#define OPT_GENERAL_NOTYPE(optname, varname, flagv, ...) \
{.name = optname, .flags = flagv, \
.offset = offsetof(OPT_BASE_STRUCT, varname), \
__VA_ARGS__}
#define OPT_HELPER_REMOVEPAREN(...) __VA_ARGS__
/* The OPT_SOMETHING->OPT_SOMETHING_ kind of redirection exists to
* make the code fully standard-conforming: the C standard requires that
* __VA_ARGS__ has at least one argument (though GCC for example would accept
* 0). Thus the first OPT_SOMETHING is a wrapper which just adds one
* argument to ensure __VA_ARGS__ is not empty when calling the next macro.
*/
#define OPT_FLAG(...) \
OPT_GENERAL(int, __VA_ARGS__, .type = &m_option_type_flag)
#define OPT_FLAG_STORE(optname, varname, flags, value) \
OPT_GENERAL(int, optname, varname, flags, .max = value, \
.type = &m_option_type_store)
#define OPT_FLOAT_STORE(optname, varname, flags, value) \
OPT_GENERAL(float, optname, varname, flags, .max = value, \
.type = &m_option_type_float_store)
#define OPT_STRINGLIST(...) \
OPT_GENERAL(char**, __VA_ARGS__, .type = &m_option_type_string_list)
#define OPT_STRING_APPEND_LIST(...) \
OPT_GENERAL(char**, __VA_ARGS__, .type = &m_option_type_string_append_list)
#define OPT_KEYVALUELIST(...) \
OPT_GENERAL(char**, __VA_ARGS__, .type = &m_option_type_keyvalue_list)
#define OPT_PATHLIST(...) \
OPT_GENERAL(char**, __VA_ARGS__, .type = &m_option_type_string_list, \
.priv = (void *)&m_option_path_separator)
#define OPT_INT(...) \
OPT_GENERAL(int, __VA_ARGS__, .type = &m_option_type_int)
#define OPT_INT64(...) \
OPT_GENERAL(int64_t, __VA_ARGS__, .type = &m_option_type_int64)
#define OPT_RANGE_(ctype, optname, varname, flags, minval, maxval, ...) \
OPT_GENERAL(ctype, optname, varname, (flags) | CONF_RANGE, \
.min = minval, .max = maxval, __VA_ARGS__)
#define OPT_INTRANGE(...) \
OPT_RANGE_(int, __VA_ARGS__, .type = &m_option_type_int)
#define OPT_FLOATRANGE(...) \
OPT_RANGE_(float, __VA_ARGS__, .type = &m_option_type_float)
#define OPT_INTPAIR(...) \
OPT_GENERAL_NOTYPE(__VA_ARGS__, .type = &m_option_type_intpair)
#define OPT_FLOAT(...) \
OPT_GENERAL(float, __VA_ARGS__, .type = &m_option_type_float)
#define OPT_DOUBLE(...) \
OPT_GENERAL(double, __VA_ARGS__, .type = &m_option_type_double)
#define OPT_STRING(...) \
OPT_GENERAL(char*, __VA_ARGS__, .type = &m_option_type_string)
#define OPT_SETTINGSLIST(optname, varname, flags, objlist) \
OPT_GENERAL(m_obj_settings_t*, optname, varname, flags, \
.type = &m_option_type_obj_settings_list, \
.priv = (void*)MP_EXPECT_TYPE(const struct m_obj_list*, objlist))
#define OPT_IMAGEFORMAT(...) \
OPT_GENERAL(int, __VA_ARGS__, .type = &m_option_type_imgfmt)
#define OPT_AUDIOFORMAT(...) \
OPT_GENERAL(int, __VA_ARGS__, .type = &m_option_type_afmt)
#define OPT_CHMAP(...) \
OPT_GENERAL(struct mp_chmap, __VA_ARGS__, .type = &m_option_type_chmap)
#define M_CHOICES(choices) \
.priv = (void *)&(const struct m_opt_choice_alternatives[]){ \
OPT_HELPER_REMOVEPAREN choices, {NULL}}
#define OPT_CHOICE(...) \
OPT_CHOICE_(__VA_ARGS__, .type = &m_option_type_choice)
#define OPT_CHOICE_(optname, varname, flags, choices, ...) \
OPT_GENERAL(int, optname, varname, flags, M_CHOICES(choices), __VA_ARGS__)
// Union of choices and an int range. The choice values can be included in the
// int range, or be completely separate - both works.
#define OPT_CHOICE_OR_INT_(optname, varname, flags, minval, maxval, choices, ...) \
OPT_GENERAL(int, optname, varname, (flags) | CONF_RANGE, \
.min = minval, .max = maxval, \
M_CHOICES(choices), __VA_ARGS__)
#define OPT_CHOICE_OR_INT(...) \
OPT_CHOICE_OR_INT_(__VA_ARGS__, .type = &m_option_type_choice)
#define OPT_TIME(...) \
OPT_GENERAL(double, __VA_ARGS__, .type = &m_option_type_time)
#define OPT_REL_TIME(...) \
OPT_GENERAL(struct m_rel_time, __VA_ARGS__, .type = &m_option_type_rel_time)
#define OPT_COLOR(...) \
OPT_GENERAL(struct m_color, __VA_ARGS__, .type = &m_option_type_color)
#define OPT_GEOMETRY(...) \
OPT_GENERAL(struct m_geometry, __VA_ARGS__, .type = &m_option_type_geometry)
#define OPT_SIZE_BOX(...) \
OPT_GENERAL(struct m_geometry, __VA_ARGS__, .type = &m_option_type_size_box)
#define OPT_TRACKCHOICE(name, var) \
OPT_CHOICE_OR_INT(name, var, 0, 0, 8190, ({"no", -2}, {"auto", -1}))
#define OPT_VID_STEREO_MODE(...) \
OPT_GENERAL(int, __VA_ARGS__, .type = &m_option_vid_stereo_mode)
#define OPT_STRING_VALIDATE_(optname, varname, flags, validate_fn, ...) \
OPT_GENERAL(char*, optname, varname, flags, __VA_ARGS__, \
.priv = MP_EXPECT_TYPE(m_opt_string_validate_fn, validate_fn))
#define OPT_STRING_VALIDATE(...) \
OPT_STRING_VALIDATE_(__VA_ARGS__, .type = &m_option_type_string)
#define OPT_PRINT(optname, fn) \
{.name = optname, \
.flags = M_OPT_FIXED | M_OPT_GLOBAL | M_OPT_NOCFG | M_OPT_PRE_PARSE, \
.type = &m_option_type_print_fn, \
.priv = MP_EXPECT_TYPE(m_opt_print_fn, fn), \
.offset = -1}
// subconf must have the type struct m_sub_options.
// All sub-options are prefixed with "name-" and are added to the current
// (containing) option list.
// If name is "", add the sub-options directly instead.
// varname refers to the field, that must be a pointer to a field described by
// the subconf struct.
#define OPT_SUBSTRUCT(name, varname, subconf, flagv) \
OPT_GENERAL_NOTYPE(name, varname, flagv, \
.type = &m_option_type_subconfig, \
.priv = (void*)&subconf)
// If "--name" was removed, but "--newname" has the same semantics.
// It will be redirected, and a warning will be printed on first use.
#define OPT_REPLACED(optname, newname) \
{.name = optname, .type = &m_option_type_alias, .priv = newname, .offset = -1}
// "--name" doesn't exist, but inform the user about a replacement with msg.
#define OPT_REMOVED(optname, msg) \
{.name = optname, .type = &m_option_type_removed, .priv = msg, .offset = -1}
#endif /* MPLAYER_M_OPTION_H */
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