mpv/options/m_option.h

644 lines
24 KiB
C
Raw Normal View History

/*
* 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 "bstr/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;
///////////////////////////// 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_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_subconfig_struct;
extern const m_option_type_t m_option_type_imgfmt;
video: decouple internal pixel formats from FourCCs mplayer's video chain traditionally used FourCCs for pixel formats. For example, it used IMGFMT_YV12 for 4:2:0 YUV, which was defined to the string 'YV12' interpreted as unsigned int. Additionally, it used to encode information into the numeric values of some formats. The RGB formats had their bit depth and endian encoded into the least significant byte. Extended planar formats (420P10 etc.) had chroma shift, endian, and component bit depth encoded. (This has been removed in recent commits.) Replace the FourCC mess with a simple enum. Remove all the redundant formats like YV12/I420/IYUV. Replace some image format names by something more intuitive, most importantly IMGFMT_YV12 -> IMGFMT_420P. Add img_fourcc.h, which contains the old IDs for code that actually uses FourCCs. Change the way demuxers, that output raw video, identify the video format: they set either MP_FOURCC_RAWVIDEO or MP_FOURCC_IMGFMT to request the rawvideo decoder, and sh_video->imgfmt specifies the pixel format. Like the previous hack, this is supposed to avoid the need for a complete codecs.cfg entry per format, or other lookup tables. (Note that the RGB raw video FourCCs mostly rely on ffmpeg's mappings for NUT raw video, but this is still considered better than adding a raw video decoder - even if trivial, it would be full of annoying lookup tables.) The TV code has not been tested. Some corrective changes regarding endian and other image format flags creep in.
2012-12-23 19:03:30 +00:00
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;
// 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_NEGATIVE,
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 M_OPT_TYPE_USE_SUBSTRUCT is used
struct m_sub_options {
const struct m_option *opts;
size_t size;
const void *defaults;
};
// FIXME: backward compatibility
#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_SUBCONFIG (&m_option_type_subconfig)
#define CONF_TYPE_STRING_LIST (&m_option_type_string_list)
#define CONF_TYPE_IMGFMT (&m_option_type_imgfmt)
video: decouple internal pixel formats from FourCCs mplayer's video chain traditionally used FourCCs for pixel formats. For example, it used IMGFMT_YV12 for 4:2:0 YUV, which was defined to the string 'YV12' interpreted as unsigned int. Additionally, it used to encode information into the numeric values of some formats. The RGB formats had their bit depth and endian encoded into the least significant byte. Extended planar formats (420P10 etc.) had chroma shift, endian, and component bit depth encoded. (This has been removed in recent commits.) Replace the FourCC mess with a simple enum. Remove all the redundant formats like YV12/I420/IYUV. Replace some image format names by something more intuitive, most importantly IMGFMT_YV12 -> IMGFMT_420P. Add img_fourcc.h, which contains the old IDs for code that actually uses FourCCs. Change the way demuxers, that output raw video, identify the video format: they set either MP_FOURCC_RAWVIDEO or MP_FOURCC_IMGFMT to request the rawvideo decoder, and sh_video->imgfmt specifies the pixel format. Like the previous hack, this is supposed to avoid the need for a complete codecs.cfg entry per format, or other lookup tables. (Note that the RGB raw video FourCCs mostly rely on ffmpeg's mappings for NUT raw video, but this is still considered better than adding a raw video decoder - even if trivial, it would be full of annoying lookup tables.) The TV code has not been tested. Some corrective changes regarding endian and other image format flags creep in.
2012-12-23 19:03:30 +00:00
#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)
// 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;
int imgfmt;
video: decouple internal pixel formats from FourCCs mplayer's video chain traditionally used FourCCs for pixel formats. For example, it used IMGFMT_YV12 for 4:2:0 YUV, which was defined to the string 'YV12' interpreted as unsigned int. Additionally, it used to encode information into the numeric values of some formats. The RGB formats had their bit depth and endian encoded into the least significant byte. Extended planar formats (420P10 etc.) had chroma shift, endian, and component bit depth encoded. (This has been removed in recent commits.) Replace the FourCC mess with a simple enum. Remove all the redundant formats like YV12/I420/IYUV. Replace some image format names by something more intuitive, most importantly IMGFMT_YV12 -> IMGFMT_420P. Add img_fourcc.h, which contains the old IDs for code that actually uses FourCCs. Change the way demuxers, that output raw video, identify the video format: they set either MP_FOURCC_RAWVIDEO or MP_FOURCC_IMGFMT to request the rawvideo decoder, and sh_video->imgfmt specifies the pixel format. Like the previous hack, this is supposed to avoid the need for a complete codecs.cfg entry per format, or other lookup tables. (Note that the RGB raw video FourCCs mostly rely on ffmpeg's mappings for NUT raw video, but this is still considered better than adding a raw video decoder - even if trivial, it would be full of annoying lookup tables.) The TV code has not been tested. Some corrective changes regarding endian and other image format flags creep in.
2012-12-23 19:03:30 +00:00
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;
options: get rid of ambiguous option parsing Options parsing used to be ambiguous, as in the splitting into option and values pairs was ambiguous. Example: -option -something It wasn't clear whether -option actually takes an argument or not. The string "-something" could either be a separate option, or an argument to "-option". The code had to call the option specific parser function to resolve this. This made everything complicated and didn't even have a real use. There was only one case where this was actually used: string lists (m_option_type_string_list) and options based on it. That is because this option type actually turns a single option into a proxy for several real arguments, e.g. "vf*" can handle "-vf-add" and "-vf-clr". Options suffixed with "-clr" are the only options of this group which take no arguments. This is ambiguous only with the "old syntax" (as shown above). The "new" option syntax always puts option name and value into same argument. (E.g. "--option=--something" or "--option" "--something".) Simplify the code by making it statically known whether an option takes a parameter or not with the flag M_OPT_TYPE_OLD_SYNTAX_NO_PARAM. If it's set, the option parser assumes the option takes no argument. The only real ambiguity left, string list options that end on "-clr", are special cased in the parser. Remove some duplication of the logic in the command line parser by moving all argument splitting logic into split_opt(). (It's arguable whether that can be considered code duplication, but now the code is a bit simpler anyway. This might be subjective.) Remove the "ambiguous" parameter from all option parsing related code. Make m_config unaware of the pre-parsing concept. Make most CONF_NOCFG options also CONF_GLOBAL (except those explicitly usable as per-file options.)
2012-08-05 21:34:28 +00:00
// 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.
/** \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);
};
// Option description
struct m_option {
// Option name.
const char *name;
// Deprecated field for "old" options which mutate global state.
void *p;
// Option type.
const m_option_type_t *type;
// See \ref OptionFlags.
unsigned int flags;
// \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;
int is_new_option;
int offset;
options: support parsing values into substructs Add an alternate mode for option parser objects (struct m_config) which is not inherently tied to any particular instance of an option value struct. Instead, this type or parsers can be used to initialize defaults in or parse values into a struct given as a parameter. They do not have the save slot functionality used for main player configuration. The new functionality will be used to replace the separate subopt_helper.c parsing code that is currently used to parse per-object suboptions in VOs etc. Previously, option default values were handled by initializing them in external code before creating a parser. This initialization was done with constants even for dynamically-allocated types like strings. Because trying to free a pointer to a constant would cause a crash when trying to replace the default with another value, parser initialization code then replaced all the original defaults with dynamically-allocated copies. This replace-with-copy behavior is no longer supported for new-style options; instead the option definition itself may contain a default value (new OPTDEF macros), and the new function m_config_initialize() is used to set all options to their default values. Convert the existing initialized dynamically allocated options in main config (the string options --dumpfile, --term-osd-esc, --input=conf) to use this. Other non-dynamic ones could be later converted to use this style of initialization too. There's currently no public call to free all dynamically allocated options in a given option struct because I intend to use talloc functionality for that (make them children of the struct and free with it).
2012-05-17 00:31:11 +00:00
// 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)
// 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)
// Parse C-style escapes like "\n" (for CONF_TYPE_STRING only)
#define M_OPT_PARSE_ESCAPES (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
#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)
options: get rid of ambiguous option parsing Options parsing used to be ambiguous, as in the splitting into option and values pairs was ambiguous. Example: -option -something It wasn't clear whether -option actually takes an argument or not. The string "-something" could either be a separate option, or an argument to "-option". The code had to call the option specific parser function to resolve this. This made everything complicated and didn't even have a real use. There was only one case where this was actually used: string lists (m_option_type_string_list) and options based on it. That is because this option type actually turns a single option into a proxy for several real arguments, e.g. "vf*" can handle "-vf-add" and "-vf-clr". Options suffixed with "-clr" are the only options of this group which take no arguments. This is ambiguous only with the "old syntax" (as shown above). The "new" option syntax always puts option name and value into same argument. (E.g. "--option=--something" or "--option" "--something".) Simplify the code by making it statically known whether an option takes a parameter or not with the flag M_OPT_TYPE_OLD_SYNTAX_NO_PARAM. If it's set, the option parser assumes the option takes no argument. The only real ambiguity left, string list options that end on "-clr", are special cased in the parser. Remove some duplication of the logic in the command line parser by moving all argument splitting logic into split_opt(). (It's arguable whether that can be considered code duplication, but now the code is a bit simpler anyway. This might be subjective.) Remove the "ambiguous" parameter from all option parsing related code. Make m_config unaware of the pre-parsing concept. Make most CONF_NOCFG options also CONF_GLOBAL (except those explicitly usable as per-file options.)
2012-08-05 21:34:28 +00:00
// modify M_OPT_TYPE_HAS_CHILD so that m_option::p points to
// struct m_sub_options, instead of a direct m_option array.
#define M_OPT_TYPE_USE_SUBSTRUCT (1 << 4)
///////////////////////////// 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);
}
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}
options: support parsing values into substructs Add an alternate mode for option parser objects (struct m_config) which is not inherently tied to any particular instance of an option value struct. Instead, this type or parsers can be used to initialize defaults in or parse values into a struct given as a parameter. They do not have the save slot functionality used for main player configuration. The new functionality will be used to replace the separate subopt_helper.c parsing code that is currently used to parse per-object suboptions in VOs etc. Previously, option default values were handled by initializing them in external code before creating a parser. This initialization was done with constants even for dynamically-allocated types like strings. Because trying to free a pointer to a constant would cause a crash when trying to replace the default with another value, parser initialization code then replaced all the original defaults with dynamically-allocated copies. This replace-with-copy behavior is no longer supported for new-style options; instead the option definition itself may contain a default value (new OPTDEF macros), and the new function m_config_initialize() is used to set all options to their default values. Convert the existing initialized dynamically allocated options in main config (the string options --dumpfile, --term-osd-esc, --input=conf) to use this. Other non-dynamic ones could be later converted to use this style of initialization too. There's currently no public call to free all dynamically allocated options in a given option struct because I intend to use talloc functionality for that (make them children of the struct and free with it).
2012-05-17 00:31:11 +00:00
#define OPT_GENERAL(ctype, optname, varname, flagv, ...) \
{.name = optname, .flags = flagv, .is_new_option = 1, \
.offset = MP_CHECKED_OFFSETOF(OPT_BASE_STRUCT, varname, ctype), \
__VA_ARGS__}
#define OPT_GENERAL_NOTYPE(optname, varname, flagv, ...) \
{.name = optname, .flags = flagv, .is_new_option = 1, \
.offset = offsetof(OPT_BASE_STRUCT, varname), \
__VA_ARGS__}
#define OPT_HELPER_REMOVEPAREN(...) __VA_ARGS__
options: support parsing values into substructs Add an alternate mode for option parser objects (struct m_config) which is not inherently tied to any particular instance of an option value struct. Instead, this type or parsers can be used to initialize defaults in or parse values into a struct given as a parameter. They do not have the save slot functionality used for main player configuration. The new functionality will be used to replace the separate subopt_helper.c parsing code that is currently used to parse per-object suboptions in VOs etc. Previously, option default values were handled by initializing them in external code before creating a parser. This initialization was done with constants even for dynamically-allocated types like strings. Because trying to free a pointer to a constant would cause a crash when trying to replace the default with another value, parser initialization code then replaced all the original defaults with dynamically-allocated copies. This replace-with-copy behavior is no longer supported for new-style options; instead the option definition itself may contain a default value (new OPTDEF macros), and the new function m_config_initialize() is used to set all options to their default values. Convert the existing initialized dynamically allocated options in main config (the string options --dumpfile, --term-osd-esc, --input=conf) to use this. Other non-dynamic ones could be later converted to use this style of initialization too. There's currently no public call to free all dynamically allocated options in a given option struct because I intend to use talloc functionality for that (make them children of the struct and free with it).
2012-05-17 00:31:11 +00:00
/* The OPT_FLAG_CONSTANTS->OPT_FLAG_CONSTANTS_ 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_FLAG_CONSTANTS 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, .max = 1)
#define OPT_FLAG_CONSTANTS_(optname, varname, flags, offvalue, value, ...) \
OPT_GENERAL(int, optname, varname, flags, \
.min = offvalue, .max = value, __VA_ARGS__)
#define OPT_FLAG_CONSTANTS(...) \
OPT_FLAG_CONSTANTS_(__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_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)
options: support parsing values into substructs Add an alternate mode for option parser objects (struct m_config) which is not inherently tied to any particular instance of an option value struct. Instead, this type or parsers can be used to initialize defaults in or parse values into a struct given as a parameter. They do not have the save slot functionality used for main player configuration. The new functionality will be used to replace the separate subopt_helper.c parsing code that is currently used to parse per-object suboptions in VOs etc. Previously, option default values were handled by initializing them in external code before creating a parser. This initialization was done with constants even for dynamically-allocated types like strings. Because trying to free a pointer to a constant would cause a crash when trying to replace the default with another value, parser initialization code then replaced all the original defaults with dynamically-allocated copies. This replace-with-copy behavior is no longer supported for new-style options; instead the option definition itself may contain a default value (new OPTDEF macros), and the new function m_config_initialize() is used to set all options to their default values. Convert the existing initialized dynamically allocated options in main config (the string options --dumpfile, --term-osd-esc, --input=conf) to use this. Other non-dynamic ones could be later converted to use this style of initialization too. There's currently no public call to free all dynamically allocated options in a given option struct because I intend to use talloc functionality for that (make them children of the struct and free with it).
2012-05-17 00:31:11 +00:00
#define OPT_TRACKCHOICE(name, var) \
OPT_CHOICE_OR_INT(name, var, 0, 1, 8190, ({"no", -2}, {"auto", -1}))
#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_GLOBAL | M_OPT_NOCFG | M_OPT_PRE_PARSE, \
.type = &m_option_type_print_fn, \
.priv = MP_EXPECT_TYPE(m_opt_print_fn, fn) }
// 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_struct, \
.priv = (void*)&subconf)
#endif /* MPLAYER_M_OPTION_H */