mpv/mpvcore/m_config.h

215 lines
8.2 KiB
C

/*
* 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_CONFIG_H
#define MPLAYER_M_CONFIG_H
#include <stddef.h>
#include <stdbool.h>
#include "mpvcore/bstr.h"
// m_config provides an API to manipulate the config variables in MPlayer.
// It makes use of the Options API to provide a context stack that
// allows saving and later restoring the state of all variables.
typedef struct m_profile m_profile_t;
struct m_option;
struct m_option_type;
struct m_sub_options;
struct m_obj_desc;
// Config option
struct m_config_option {
bool is_generated : 1; // Automatically added ("no-" options)
bool is_set_from_cmdline : 1; // Set by user from command line
const char *name; // Full name (ie option-subopt)
const struct m_option *opt; // Option description
void *data; // Raw value of the option
const void *default_data; // Raw default value
};
// Config object
/** \ingroup Config */
typedef struct m_config {
// Registered options.
struct m_config_option *opts; // all options, even suboptions
int num_opts;
// List of defined profiles.
struct m_profile *profiles;
// Depth when recursively including profiles.
int profile_depth;
struct m_opt_backup *backup_opts;
bool use_profiles;
int (*includefunc)(struct m_config *conf, char *filename, int flags);
void *optstruct; // struct mpopts or other
} m_config_t;
// Create a new config object.
// talloc_ctx: talloc parent context for the m_config allocation
// size: size of the optstruct (where option values are stored)
// size==0 creates a config object with no option struct allocated
// defaults: if not NULL, points to a struct of same type as optstruct, which
// contains default values for all options
// options: list of options. Each option defines a member of the optstruct
// and a corresponding option switch or sub-option field.
// suboptinit: if not NULL, initialize the suboption string (used for presets)
// Note that the m_config object will keep pointers to defaults and options.
struct m_config *m_config_new(void *talloc_ctx, size_t size,
const void *defaults,
const struct m_option *options);
struct m_config *m_config_from_obj_desc(void *talloc_ctx,
struct m_obj_desc *desc);
struct m_config *m_config_from_obj_desc_noalloc(void *talloc_ctx,
struct m_obj_desc *desc);
int m_config_set_obj_params(struct m_config *conf, char **args);
// Initialize an object (VO/VF/...) in one go, including legacy handling.
// This is pretty specialized, and is just for convenience.
int m_config_initialize_obj(struct m_config *config, struct m_obj_desc *desc,
void **ppriv, char ***pargs);
// Make sure the option is backed up. If it's already backed up, do nothing.
// All backed up options can be restored with m_config_restore_backups().
void m_config_backup_opt(struct m_config *config, const char *opt);
// Call m_config_backup_opt() on all options.
void m_config_backup_all_opts(struct m_config *config);
// Restore all options backed up with m_config_backup_opt(), and delete the
// backups afterwards.
void m_config_restore_backups(struct m_config *config);
enum {
M_SETOPT_PRE_PARSE_ONLY = 1, // Silently ignore non-M_OPT_PRE_PARSE opt.
M_SETOPT_CHECK_ONLY = 2, // Don't set, just check name/value
M_SETOPT_FROM_CONFIG_FILE = 4, // Reject M_OPT_NOCFG opt. (print error)
M_SETOPT_FROM_CMDLINE = 8, // Mark as set by command line
M_SETOPT_BACKUP = 16, // Call m_config_backup_opt() before
M_SETOPT_PRESERVE_CMDLINE = 32, // Don't set if already marked as FROM_CMDLINE
};
// Set the named option to the given string.
// flags: combination of M_SETOPT_* flags (0 for normal operation)
// Returns >= 0 on success, otherwise see OptionParserReturn.
int m_config_set_option_ext(struct m_config *config, struct bstr name,
struct bstr param, int flags);
/* Set an option. (Like: m_config_set_option_ext(config, name, param, 0))
* \param config The config object.
* \param name The option's name.
* \param param The value of the option, can be NULL.
* \return See \ref OptionParserReturn.
*/
int m_config_set_option(struct m_config *config, struct bstr name,
struct bstr param);
static inline int m_config_set_option0(struct m_config *config,
const char *name, const char *param)
{
return m_config_set_option(config, bstr0(name), bstr0(param));
}
int m_config_parse_suboptions(struct m_config *config, char *name,
char *subopts);
/* Get the option matching the given name.
* \param config The config object.
* \param name The option's name.
*/
const struct m_option *m_config_get_option(const struct m_config *config,
struct bstr name);
struct m_config_option *m_config_get_co(const struct m_config *config,
struct bstr name);
// Return the n-th option by position. n==0 is the first option. If there are
// less than (n + 1) options, return NULL.
const char *m_config_get_positional_option(const struct m_config *config, int n);
// Return a hint to the option parser whether a parameter is/may be required.
// The option may still accept empty/non-empty parameters independent from
// this, and this function is useful only for handling ambiguous options like
// flags (e.g. "--a" is ok, "--a=yes" is also ok).
// Returns: error code (<0), or number of expected params (0, 1)
int m_config_option_requires_param(struct m_config *config, bstr name);
/* Print a list of all registered options.
* \param config The config object.
*/
void m_config_print_option_list(const struct m_config *config);
/* Find the profile with the given name.
* \param config The config object.
* \param arg The profile's name.
* \return The profile object or NULL.
*/
struct m_profile *m_config_get_profile0(const struct m_config *config,
char *name);
struct m_profile *m_config_get_profile(const struct m_config *config, bstr name);
/* Get the profile with the given name, creating it if necessary.
* \param config The config object.
* \param arg The profile's name.
* \return The profile object.
*/
struct m_profile *m_config_add_profile(struct m_config *config, char *name);
/* Set the description of a profile.
* Used by the config file parser when defining a profile.
*
* \param p The profile object.
* \param arg The profile's name.
*/
void m_profile_set_desc(struct m_profile *p, bstr desc);
/* Add an option to a profile.
* Used by the config file parser when defining a profile.
*
* \param config The config object.
* \param p The profile object.
* \param name The option's name.
* \param val The option's value.
*/
int m_config_set_profile_option(struct m_config *config, struct m_profile *p,
bstr name, bstr val);
/* Enables profile usage
* Used by the config file parser when loading a profile.
*
* \param config The config object.
* \param p The profile object.
* \param flags M_SETOPT_* bits
*/
void m_config_set_profile(struct m_config *config, struct m_profile *p,
int flags);
void *m_config_alloc_struct(void *talloc_ctx,
const struct m_sub_options *subopts);
#endif /* MPLAYER_M_CONFIG_H */