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mpv/m_config.h
Uoti Urpala 89b37a32da options: add "disabled option" functionality
Add functionality to mark options that depend on features disabled at
compile time as disabled rather than not compiling the option
definitions at all. This allows printing a warning about the option
not being available because of a disabled feature, instead of just
"unknown option". Because the option definitions are still compiled
fully, this only works for definitions that do not reference symbols
which are not available if the feature is disabled. Use the new
functionality for options depending on libass.
2011-09-04 14:36:09 +03:00

221 lines
6.8 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 <stdbool.h>
#include "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;
// Config option save slot
struct m_config_save_slot {
// Previous level slot.
struct m_config_save_slot *prev;
// Level at which the save was made.
int lvl;
// We have to store other datatypes in this as well,
// so make sure we get properly aligned addresses.
unsigned char data[0] __attribute__ ((aligned(8)));
};
// Config option
struct m_config_option {
struct m_config_option *next;
// Full name (ie option:subopt).
char *name;
// Compiled without support for this option? If so set to name of feature
char *disabled_feature;
// Option description.
const struct m_option *opt;
// Save slot stack.
struct m_config_save_slot *slots;
// See \ref ConfigOptionFlags.
unsigned int flags;
};
// Profiles allow to predefine some sets of options that can then
// be applied later on with the internal -profile option.
// Config profile
struct m_profile {
struct m_profile *next;
char *name;
char *desc;
int num_opts;
// Option/value pair array.
char **opts;
};
enum option_source {
// Set when parsing from a config file.
M_CONFIG_FILE,
// Set when parsing command line arguments.
M_COMMAND_LINE,
// Set when pre-parsing the command line
M_COMMAND_LINE_PRE_PARSE,
};
// Config object
/** \ingroup Config */
typedef struct m_config {
// Registered options.
/** This contains all options and suboptions.
*/
struct m_config_option *opts;
// Current stack level.
int lvl;
enum option_source mode;
// List of defined profiles.
struct m_profile *profiles;
// Depth when recursively including profiles.
int profile_depth;
void *optstruct; // struct mpopts or other
} m_config_t;
// Set if an option has been set at the current level.
#define M_CFG_OPT_SET (1 << 0)
// Set if another option already uses the same variable.
#define M_CFG_OPT_ALIAS (1 << 1)
// Create a new config object.
struct m_config *
m_config_new(void *optstruct,
int includefunc(struct m_option *conf, char *filename));
// Free a config object.
void m_config_free(struct m_config *config);
/* Push a new context.
* \param config The config object.
*/
void m_config_push(struct m_config *config);
/* Pop the current context restoring the previous context state.
* \param config The config object.
*/
void m_config_pop(struct m_config *config);
/* Register some options to be used.
* \param config The config object.
* \param args An array of \ref m_option struct.
* \return 1 on success, 0 on failure.
*/
int m_config_register_options(struct m_config *config,
const struct m_option *args);
/* Set an option.
* \param config The config object.
* \param name The option's name.
* \param param The value of the option, can be NULL.
* \param ambiguous_param: old style cmdline option, "param" may be a
parameter to this option or something entirely unrelated
* \return See \ref OptionParserReturn.
*/
int m_config_set_option(struct m_config *config, struct bstr name,
struct bstr param, bool ambiguous_param);
static inline int m_config_set_option0(struct m_config *config,
const char *name, const char *param,
bool ambiguous)
{
return m_config_set_option(config, bstr(name), bstr(param), ambiguous);
}
/* Check if an option setting is valid.
* Same as above m_config_set_option() but doesn't actually set anything.
*/
int m_config_check_option(const struct m_config *config, struct bstr name,
struct bstr param, bool ambiguous_param);
static inline int m_config_check_option0(struct m_config *config,
const char *name, const char *param,
bool ambiguous)
{
return m_config_check_option(config, bstr(name), bstr(param), ambiguous);
}
/* 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);
/* 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_profile(const struct m_config *config,
char *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, char *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,
char *name, char *val);
/* Enables profile usage
* Used by the config file parser when loading a profile.
*
* \param config The config object.
* \param p The profile object.
*/
void m_config_set_profile(struct m_config *config, struct m_profile *p);
#endif /* MPLAYER_M_CONFIG_H */