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mpv/options/m_config.c

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
/// \file
/// \ingroup Config
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <strings.h>
#include <assert.h>
#include <stdbool.h>
#include <pthread.h>
#include "libmpv/client.h"
#include "mpv_talloc.h"
#include "m_config.h"
#include "options/m_option.h"
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include "common/msg_control.h"
#include "misc/dispatch.h"
#include "misc/node.h"
#include "osdep/atomic.h"
extern const char mp_help_text[];
static const union m_option_value default_value;
// Profiles allow to predefine some sets of options that can then
// be applied later on with the internal -profile option.
#define MAX_PROFILE_DEPTH 20
// Maximal include depth.
#define MAX_RECURSION_DEPTH 8
// For use with m_config_cache.
struct m_config_shadow {
pthread_mutex_t lock;
struct m_config *root;
char *data;
struct m_config_cache **listeners;
int num_listeners;
};
// Represents a sub-struct (OPT_SUBSTRUCT()).
struct m_config_group {
const struct m_sub_options *group; // or NULL for top-level options
int parent_group; // index of parent group in m_config.groups
void *opts; // pointer to group user option struct
atomic_llong ts; // incremented on every write access
};
struct m_profile {
struct m_profile *next;
char *name;
char *desc;
int num_opts;
// Option/value pair array.
char **opts;
};
// In the file local case, this contains the old global value.
struct m_opt_backup {
struct m_opt_backup *next;
struct m_config_option *co;
void *backup;
};
static int show_profile(struct m_config *config, bstr param)
{
struct m_profile *p;
if (!param.len)
return M_OPT_MISSING_PARAM;
if (!(p = m_config_get_profile(config, param))) {
MP_ERR(config, "Unknown profile '%.*s'.\n", BSTR_P(param));
return M_OPT_EXIT;
}
if (!config->profile_depth)
MP_INFO(config, "Profile %s: %s\n", p->name,
p->desc ? p->desc : "");
config->profile_depth++;
for (int i = 0; i < p->num_opts; i++) {
MP_INFO(config, "%*s%s=%s\n", config->profile_depth, "",
p->opts[2 * i], p->opts[2 * i + 1]);
if (config->profile_depth < MAX_PROFILE_DEPTH
&& !strcmp(p->opts[2*i], "profile")) {
char *e, *list = p->opts[2 * i + 1];
while ((e = strchr(list, ','))) {
int l = e - list;
if (!l)
continue;
show_profile(config, (bstr){list, e - list});
list = e + 1;
}
if (list[0] != '\0')
show_profile(config, bstr0(list));
}
}
config->profile_depth--;
if (!config->profile_depth)
MP_INFO(config, "\n");
return M_OPT_EXIT;
}
// The memcpys are supposed to work around the strict aliasing violation,
// that would result if we just dereferenced a void** (where the void** is
// actually casted from struct some_type* ). The dummy struct type is in
// theory needed, because void* and struct pointers could have different
// representations, while pointers to different struct types don't.
static void *substruct_read_ptr(const void *ptr)
{
struct mp_dummy_ *res;
memcpy(&res, ptr, sizeof(res));
return res;
}
static void substruct_write_ptr(void *ptr, void *val)
{
struct mp_dummy_ *src = val;
memcpy(ptr, &src, sizeof(src));
}
static void add_options(struct m_config *config,
struct m_config_option *parent,
void *optstruct,
const void *optstruct_def,
const struct m_option *defs);
static void config_destroy(void *p)
{
struct m_config *config = p;
m_config_restore_backups(config);
for (int n = 0; n < config->num_opts; n++) {
struct m_config_option *co = &config->opts[n];
m_option_free(co->opt, co->data);
if (config->shadow && co->shadow_offset >= 0)
m_option_free(co->opt, config->shadow->data + co->shadow_offset);
}
if (config->shadow) {
// must all have been unregistered
assert(config->shadow->num_listeners == 0);
pthread_mutex_destroy(&config->shadow->lock);
}
}
struct m_config *m_config_new(void *talloc_ctx, struct mp_log *log,
size_t size, const void *defaults,
const struct m_option *options)
{
struct m_config *config = talloc(talloc_ctx, struct m_config);
talloc_set_destructor(config, config_destroy);
*config = (struct m_config)
{.log = log, .size = size, .defaults = defaults, .options = options};
// size==0 means a dummy object is created
if (size) {
config->optstruct = talloc_zero_size(config, size);
if (defaults)
memcpy(config->optstruct, defaults, size);
}
config->num_groups = 1;
MP_TARRAY_GROW(config, config->groups, 1);
config->groups[0] = (struct m_config_group){
.parent_group = -1,
.opts = config->optstruct,
};
if (options)
add_options(config, NULL, config->optstruct, defaults, options);
return config;
}
static struct m_config *m_config_from_obj_desc(void *talloc_ctx,
struct mp_log *log,
struct mpv_global *global,
struct m_obj_desc *desc)
{
struct m_config *c =
m_config_new(talloc_ctx, log, desc->priv_size, desc->priv_defaults,
desc->options);
c->global = global;
if (desc->set_defaults && c->global)
desc->set_defaults(c->global, c->optstruct);
return c;
}
// Like m_config_from_obj_desc(), but don't allocate option struct.
struct m_config *m_config_from_obj_desc_noalloc(void *talloc_ctx,
struct mp_log *log,
struct m_obj_desc *desc)
{
return m_config_new(talloc_ctx, log, 0, desc->priv_defaults, desc->options);
}
static struct m_config_group *find_group(struct mpv_global *global,
const struct m_option *cfg)
{
struct m_config_shadow *shadow = global->config;
struct m_config *root = shadow->root;
for (int n = 0; n < root->num_groups; n++) {
if (cfg && root->groups[n].group && root->groups[n].group->opts == cfg)
return &root->groups[n];
}
return NULL;
}
// Allocate a priv struct that is backed by global options (like AOs and VOs,
// anything that uses m_obj_list.use_global_options == true).
// The result contains a snapshot of the current option values of desc->options.
// For convenience, desc->options can be NULL; then priv struct is allocated
// with just zero (or priv_defaults if set).
void *m_config_group_from_desc(void *ta_parent, struct mp_log *log,
struct mpv_global *global, struct m_obj_desc *desc, const char *name)
{
struct m_config_group *group = find_group(global, desc->options);
if (group) {
return mp_get_config_group(ta_parent, global, group->group);
} else {
void *d = talloc_zero_size(ta_parent, desc->priv_size);
if (desc->priv_defaults)
memcpy(d, desc->priv_defaults, desc->priv_size);
return d;
}
}
static int m_config_set_obj_params(struct m_config *config, struct mp_log *log,
struct mpv_global *global,
struct m_obj_desc *desc, char **args)
{
for (int n = 0; args && args[n * 2 + 0]; n++) {
bstr opt = bstr0(args[n * 2 + 0]);
bstr val = bstr0(args[n * 2 + 1]);
if (m_config_set_option_cli(config, opt, val, 0) < 0)
return -1;
}
return 0;
}
struct m_config *m_config_from_obj_desc_and_args(void *ta_parent,
struct mp_log *log, struct mpv_global *global, struct m_obj_desc *desc,
const char *name, struct m_obj_settings *defaults, char **args)
{
struct m_config *config = m_config_from_obj_desc(ta_parent, log, global, desc);
for (int n = 0; defaults && defaults[n].name; n++) {
struct m_obj_settings *entry = &defaults[n];
if (name && strcmp(entry->name, name) == 0) {
if (m_config_set_obj_params(config, log, global, desc, entry->attribs) < 0)
goto error;
}
}
if (m_config_set_obj_params(config, log, global, desc, args) < 0)
goto error;
return config;
error:
talloc_free(config);
return NULL;
}
static void ensure_backup(struct m_config *config, struct m_config_option *co)
{
if (!co->data)
return;
for (struct m_opt_backup *cur = config->backup_opts; cur; cur = cur->next) {
if (cur->co->data == co->data) // comparing data ptr catches aliases
return;
}
struct m_opt_backup *bc = talloc_ptrtype(NULL, bc);
*bc = (struct m_opt_backup) {
.co = co,
.backup = talloc_zero_size(bc, co->opt->type->size),
};
m_option_copy(co->opt, bc->backup, co->data);
bc->next = config->backup_opts;
config->backup_opts = bc;
co->is_set_locally = true;
}
void m_config_restore_backups(struct m_config *config)
{
while (config->backup_opts) {
struct m_opt_backup *bc = config->backup_opts;
config->backup_opts = bc->next;
m_config_set_option_raw(config, bc->co, bc->backup, 0);
m_option_free(bc->co->opt, bc->backup);
bc->co->is_set_locally = false;
talloc_free(bc);
}
}
void m_config_backup_opt(struct m_config *config, const char *opt)
{
struct m_config_option *co = m_config_get_co(config, bstr0(opt));
if (co) {
ensure_backup(config, co);
} else {
MP_ERR(config, "Option %s not found.\n", opt);
}
}
void m_config_backup_all_opts(struct m_config *config)
{
for (int n = 0; n < config->num_opts; n++)
ensure_backup(config, &config->opts[n]);
}
static void m_config_add_option(struct m_config *config,
struct m_config_option *parent,
void *optstruct,
const void *optstruct_def,
const struct m_option *arg);
static void add_options(struct m_config *config,
struct m_config_option *parent,
void *optstruct,
const void *optstruct_def,
const struct m_option *defs)
{
for (int i = 0; defs && defs[i].name; i++)
m_config_add_option(config, parent, optstruct, optstruct_def, &defs[i]);
}
static void add_sub_options(struct m_config *config,
struct m_config_option *parent,
const struct m_sub_options *subopts)
{
// Can't be used multiple times.
for (int n = 0; n < config->num_groups; n++)
assert(config->groups[n].group != subopts);
// You can only use UPDATE_ flags here.
assert(!(subopts->change_flags & ~(unsigned)UPDATE_OPTS_MASK));
void *new_optstruct = NULL;
if (config->optstruct) { // only if not noalloc
new_optstruct = talloc_zero_size(config, subopts->size);
if (subopts->defaults)
memcpy(new_optstruct, subopts->defaults, subopts->size);
}
if (parent && parent->data)
substruct_write_ptr(parent->data, new_optstruct);
const void *new_optstruct_def = NULL;
if (parent && parent->default_data)
new_optstruct_def = substruct_read_ptr(parent->default_data);
if (!new_optstruct_def)
new_optstruct_def = subopts->defaults;
int group = config->num_groups++;
MP_TARRAY_GROW(config, config->groups, group);
config->groups[group] = (struct m_config_group){
.group = subopts,
.parent_group = parent ? parent->group : 0,
.opts = new_optstruct,
};
struct m_config_option next = {
.name = "",
.group = group,
};
if (parent && parent->name && parent->name[0])
next.name = parent->name;
if (subopts->prefix && subopts->prefix[0]) {
assert(next.name);
next.name = subopts->prefix;
}
add_options(config, &next, new_optstruct, new_optstruct_def, subopts->opts);
}
#define MAX_VO_AO 16
struct group_entry {
const struct m_obj_list *entry;
struct m_sub_options subs[MAX_VO_AO];
bool initialized;
};
static struct group_entry g_groups[2]; // limited by max. m_obj_list overall
static int g_num_groups = 0;
static pthread_mutex_t g_group_mutex = PTHREAD_MUTEX_INITIALIZER;
static const struct m_sub_options *get_cached_group(const struct m_obj_list *list,
int n, struct m_sub_options *v)
{
pthread_mutex_lock(&g_group_mutex);
struct group_entry *group = NULL;
for (int i = 0; i < g_num_groups; i++) {
if (g_groups[i].entry == list) {
group = &g_groups[i];
break;
}
}
if (!group) {
assert(g_num_groups < MP_ARRAY_SIZE(g_groups));
group = &g_groups[g_num_groups++];
group->entry = list;
}
if (!group->initialized) {
if (!v) {
n = -1;
group->initialized = true;
} else {
assert(n < MAX_VO_AO); // simply increase this if it fails
group->subs[n] = *v;
}
}
pthread_mutex_unlock(&g_group_mutex);
return n >= 0 ? &group->subs[n] : NULL;
}
static void init_obj_settings_list(struct m_config *config,
const struct m_obj_list *list)
{
struct m_obj_desc desc;
for (int n = 0; ; n++) {
if (!list->get_desc(&desc, n)) {
if (list->use_global_options)
get_cached_group(list, n, NULL);
break;
}
if (desc.global_opts)
add_sub_options(config, NULL, desc.global_opts);
if (list->use_global_options && desc.options) {
struct m_sub_options conf = {
.prefix = desc.options_prefix,
.opts = desc.options,
.defaults = desc.priv_defaults,
.size = desc.priv_size,
};
add_sub_options(config, NULL, get_cached_group(list, n, &conf));
}
}
}
// Initialize a field with a given value. In case this is dynamic data, it has
// to be allocated and copied. src can alias dst, also can be NULL.
static void init_opt_inplace(const struct m_option *opt, void *dst,
const void *src)
{
union m_option_value temp = {0};
if (src)
memcpy(&temp, src, opt->type->size);
memset(dst, 0, opt->type->size);
m_option_copy(opt, dst, &temp);
}
static void m_config_add_option(struct m_config *config,
struct m_config_option *parent,
void *optstruct,
const void *optstruct_def,
const struct m_option *arg)
{
assert(config != NULL);
assert(arg != NULL);
const char *parent_name = parent ? parent->name : "";
struct m_config_option co = {
.opt = arg,
.name = arg->name,
.shadow_offset = -1,
.group = parent ? parent->group : 0,
.default_data = &default_value,
.is_hidden = !!arg->deprecation_message,
};
if (arg->offset >= 0) {
if (optstruct)
co.data = (char *)optstruct + arg->offset;
if (optstruct_def)
co.default_data = (char *)optstruct_def + arg->offset;
}
if (arg->defval)
co.default_data = arg->defval;
// Fill in the full name
if (!co.name[0]) {
co.name = parent_name;
} else if (parent_name[0]) {
co.name = talloc_asprintf(config, "%s-%s", parent_name, co.name);
}
if (arg->type == &m_option_type_subconfig) {
const struct m_sub_options *subopts = arg->priv;
add_sub_options(config, &co, subopts);
} else {
int size = arg->type->size;
if (optstruct && size) {
// The required alignment is unknown, so go with the maximum C
// could require. Slightly wasteful, but not that much.
int align = (size - config->shadow_size % size) % size;
co.shadow_offset = config->shadow_size + align;
config->shadow_size = co.shadow_offset + size;
}
// Initialize options
if (co.data && co.default_data)
init_opt_inplace(arg, co.data, co.default_data);
MP_TARRAY_APPEND(config, config->opts, config->num_opts, co);
if (arg->type == &m_option_type_obj_settings_list)
init_obj_settings_list(config, (const struct m_obj_list *)arg->priv);
}
}
struct m_config_option *m_config_get_co_raw(const struct m_config *config,
struct bstr name)
{
if (!name.len)
return NULL;
for (int n = 0; n < config->num_opts; n++) {
struct m_config_option *co = &config->opts[n];
struct bstr coname = bstr0(co->name);
if (bstrcmp(coname, name) == 0)
return co;
}
return NULL;
}
// Like m_config_get_co_raw(), but resolve aliases.
static struct m_config_option *m_config_get_co_any(const struct m_config *config,
struct bstr name)
{
struct m_config_option *co = m_config_get_co_raw(config, name);
if (!co)
return NULL;
const char *prefix = config->is_toplevel ? "--" : "";
if (co->opt->type == &m_option_type_alias) {
const char *alias = (const char *)co->opt->priv;
if (co->opt->deprecation_message && !co->warning_was_printed) {
if (co->opt->deprecation_message[0]) {
MP_WARN(config, "Warning: option %s%s was replaced with "
"%s%s: %s\n", prefix, co->name, prefix, alias,
co->opt->deprecation_message);
} else {
MP_WARN(config, "Warning: option %s%s was replaced with "
"%s%s and might be removed in the future.\n",
prefix, co->name, prefix, alias);
}
co->warning_was_printed = true;
}
return m_config_get_co_any(config, bstr0(alias));
} else if (co->opt->type == &m_option_type_removed) {
if (!co->warning_was_printed) {
char *msg = co->opt->priv;
if (msg) {
MP_FATAL(config, "Option %s%s was removed: %s\n",
prefix, co->name, msg);
} else {
MP_FATAL(config, "Option %s%s was removed.\n",
prefix, co->name);
}
co->warning_was_printed = true;
}
return NULL;
} else if (co->opt->deprecation_message) {
if (!co->warning_was_printed) {
MP_WARN(config, "Warning: option %s%s is deprecated "
"and might be removed in the future (%s).\n",
prefix, co->name, co->opt->deprecation_message);
co->warning_was_printed = true;
}
}
return co;
}
struct m_config_option *m_config_get_co(const struct m_config *config,
struct bstr name)
{
struct m_config_option *co = m_config_get_co_any(config, name);
// CLI aliases should not be real options, and are explicitly handled by
// m_config_set_option_cli(). So petend it does not exist.
if (co && co->opt->type == &m_option_type_cli_alias)
co = NULL;
return co;
}
int m_config_get_co_count(struct m_config *config)
{
return config->num_opts;
}
struct m_config_option *m_config_get_co_index(struct m_config *config, int index)
{
return &config->opts[index];
}
const char *m_config_get_positional_option(const struct m_config *config, int p)
{
int pos = 0;
for (int n = 0; n < config->num_opts; n++) {
struct m_config_option *co = &config->opts[n];
if (!co->is_hidden) {
if (pos == p)
return co->name;
pos++;
}
}
return NULL;
}
// return: <0: M_OPT_ error, 0: skip, 1: check, 2: set
static int handle_set_opt_flags(struct m_config *config,
struct m_config_option *co, int flags)
{
int optflags = co->opt->flags;
bool set = !(flags & M_SETOPT_CHECK_ONLY);
if ((flags & M_SETOPT_PRE_PARSE_ONLY) && !(optflags & M_OPT_PRE_PARSE))
return 0;
if ((flags & M_SETOPT_PRESERVE_CMDLINE) && co->is_set_from_cmdline)
set = false;
if ((flags & M_SETOPT_NO_OVERWRITE) &&
(co->is_set_from_cmdline || co->is_set_from_config))
set = false;
if ((flags & M_SETOPT_NO_FIXED) && (optflags & M_OPT_FIXED))
return M_OPT_INVALID;
if ((flags & M_SETOPT_NO_PRE_PARSE) && (optflags & M_OPT_PRE_PARSE))
return M_OPT_INVALID;
// Check if this option isn't forbidden in the current mode
if ((flags & M_SETOPT_FROM_CONFIG_FILE) && (optflags & M_OPT_NOCFG)) {
MP_ERR(config, "The %s option can't be used in a config file.\n",
co->name);
return M_OPT_INVALID;
}
if ((flags & M_SETOPT_BACKUP) && set)
ensure_backup(config, co);
return set ? 2 : 1;
}
void m_config_mark_co_flags(struct m_config_option *co, int flags)
{
if (flags & M_SETOPT_FROM_CMDLINE)
co->is_set_from_cmdline = true;
if (flags & M_SETOPT_FROM_CONFIG_FILE)
co->is_set_from_config = true;
}
// Special options that don't really fit into the option handling mode. They
// usually store no data, but trigger actions. Caller is assumed to have called
// handle_set_opt_flags() to make sure the option can be set.
// Returns M_OPT_UNKNOWN if the option is not a special option.
static int m_config_handle_special_options(struct m_config *config,
struct m_config_option *co,
void *data, int flags)
{
if (config->use_profiles && strcmp(co->name, "profile") == 0) {
char **list = *(char ***)data;
if (list && list[0] && !list[1] && strcmp(list[0], "help") == 0) {
if (!config->profiles) {
MP_INFO(config, "No profiles have been defined.\n");
return M_OPT_EXIT;
}
MP_INFO(config, "Available profiles:\n");
for (struct m_profile *p = config->profiles; p; p = p->next)
MP_INFO(config, "\t%s\t%s\n", p->name, p->desc ? p->desc : "");
MP_INFO(config, "\n");
return M_OPT_EXIT;
}
for (int n = 0; list && list[n]; n++) {
int r = m_config_set_profile(config, list[n], flags);
if (r < 0)
return r;
}
return 0;
}
if (config->includefunc && strcmp(co->name, "include") == 0) {
char *param = *(char **)data;
if (!param || !param[0])
return M_OPT_MISSING_PARAM;
if (config->recursion_depth >= MAX_RECURSION_DEPTH) {
MP_ERR(config, "Maximum 'include' nesting depth exceeded.\n");
return M_OPT_INVALID;
}
config->recursion_depth += 1;
config->includefunc(config->includefunc_ctx, param, flags);
config->recursion_depth -= 1;
if (config->recursion_depth == 0 && config->profile_depth == 0)
m_config_finish_default_profile(config, flags);
return 1;
}
if (config->use_profiles && strcmp(co->name, "show-profile") == 0)
return show_profile(config, bstr0(*(char **)data));
if (config->is_toplevel && (strcmp(co->name, "h") == 0 ||
strcmp(co->name, "help") == 0))
{
char *h = *(char **)data;
mp_info(config->log, "%s", mp_help_text);
if (h && h[0])
m_config_print_option_list(config, h);
return M_OPT_EXIT;
}
if (strcmp(co->name, "list-options") == 0) {
m_config_print_option_list(config, "*");
return M_OPT_EXIT;
}
return M_OPT_UNKNOWN;
}
// Unlike m_config_set_option_raw() this does not go through the property layer
// via config.option_set_callback.
int m_config_set_option_raw_direct(struct m_config *config,
struct m_config_option *co,
void *data, int flags)
{
if (!co)
return M_OPT_UNKNOWN;
int r = handle_set_opt_flags(config, co, flags);
if (r <= 1)
return r;
r = m_config_handle_special_options(config, co, data, flags);
if (r != M_OPT_UNKNOWN)
return r;
// This affects some special options like "playlist", "v". Maybe these
// should work, or maybe not. For now they would require special code.
if (!co->data)
return flags & M_SETOPT_FROM_CMDLINE ? 0 : M_OPT_UNKNOWN;
m_option_copy(co->opt, co->data, data);
m_config_mark_co_flags(co, flags);
m_config_notify_change_co(config, co);
return 0;
}
// Similar to m_config_set_option_cli(), but set as data in its native format.
// This takes care of some details like sending change notifications.
// The type data points to is as in: co->opt
int m_config_set_option_raw(struct m_config *config, struct m_config_option *co,
void *data, int flags)
{
if (!co)
return M_OPT_UNKNOWN;
if (config->option_set_callback) {
int r = handle_set_opt_flags(config, co, flags);
if (r <= 1)
return r;
return config->option_set_callback(config->option_set_callback_cb,
co, data, flags);
} else {
return m_config_set_option_raw_direct(config, co, data, flags);
}
}
// Handle CLI exceptions to option handling.
// Used to turn "--no-foo" into "--foo=no".
// It also handles looking up "--vf-add" as "--vf".
static struct m_config_option *m_config_mogrify_cli_opt(struct m_config *config,
struct bstr *name,
bool *out_negate,
int *out_add_flags)
{
*out_negate = false;
*out_add_flags = 0;
struct m_config_option *co = m_config_get_co(config, *name);
if (co)
return co;
// Turn "--no-foo" into "foo" + set *out_negate.
if (!co && bstr_eatstart0(name, "no-")) {
co = m_config_get_co(config, *name);
// Not all choice types have this value - if they don't, then parsing
// them will simply result in an error. Good enough.
if (co && co->opt->type != CONF_TYPE_FLAG &&
co->opt->type != CONF_TYPE_CHOICE &&
co->opt->type != &m_option_type_aspect)
return NULL;
*out_negate = true;
return co;
}
// Resolve CLI alias. (We don't allow you to combine them with "--no-".)
co = m_config_get_co_any(config, *name);
if (co && co->opt->type == &m_option_type_cli_alias)
*name = bstr0((char *)co->opt->priv);
// Might be a suffix "action", like "--vf-add". Expensively check for
// matches. (We don't allow you to combine them with "--no-".)
for (int n = 0; n < config->num_opts; n++) {
co = &config->opts[n];
struct bstr basename = bstr0(co->name);
if (!bstr_startswith(*name, basename))
continue;
// Aliased option + a suffix action, e.g. --opengl-shaders-append
if (co->opt->type == &m_option_type_alias)
co = m_config_get_co_any(config, basename);
if (!co)
continue;
const struct m_option_type *type = co->opt->type;
for (int i = 0; type->actions && type->actions[i].name; i++) {
const struct m_option_action *action = &type->actions[i];
bstr suffix = bstr0(action->name);
if (bstr_endswith(*name, suffix) &&
(name->len == basename.len + 1 + suffix.len) &&
name->start[basename.len] == '-')
{
*out_add_flags = action->flags;
return co;
}
}
}
return NULL;
}
// Set the named option to the given string. This is for command line and config
// file use only.
// flags: combination of M_SETOPT_* flags (0 for normal operation)
// Returns >= 0 on success, otherwise see OptionParserReturn.
int m_config_set_option_cli(struct m_config *config, struct bstr name,
struct bstr param, int flags)
{
int r;
assert(config != NULL);
bool negate;
struct m_config_option *co =
m_config_mogrify_cli_opt(config, &name, &negate, &(int){0});
if (!co) {
r = M_OPT_UNKNOWN;
goto done;
}
if (negate) {
if (param.len) {
r = M_OPT_DISALLOW_PARAM;
goto done;
}
param = bstr0("no");
}
// This is the only mandatory function
assert(co->opt->type->parse);
r = handle_set_opt_flags(config, co, flags);
if (r <= 0)
goto done;
if (r == 2) {
MP_DBG(config, "Setting option '%.*s' = '%.*s' (flags = %d)\n",
BSTR_P(name), BSTR_P(param), flags);
}
union m_option_value val = {0};
// Some option types are "impure" and work on the existing data.
// (Prime examples: --vf-add, --sub-file)
if (co->data)
m_option_copy(co->opt, &val, co->data);
r = m_option_parse(config->log, co->opt, name, param, &val);
if (r >= 0)
r = m_config_set_option_raw(config, co, &val, flags);
m_option_free(co->opt, &val);
done:
if (r < 0 && r != M_OPT_EXIT) {
MP_ERR(config, "Error parsing option %.*s (%s)\n",
BSTR_P(name), m_option_strerror(r));
r = M_OPT_INVALID;
}
return r;
}
int m_config_set_option_node(struct m_config *config, bstr name,
struct mpv_node *data, int flags)
{
int r;
struct m_config_option *co = m_config_get_co(config, name);
if (!co)
return M_OPT_UNKNOWN;
// Do this on an "empty" type to make setting the option strictly overwrite
// the old value, as opposed to e.g. appending to lists.
union m_option_value val = {0};
if (data->format == MPV_FORMAT_STRING) {
bstr param = bstr0(data->u.string);
r = m_option_parse(mp_null_log, co->opt, name, param, &val);
} else {
r = m_option_set_node(co->opt, &val, data);
}
if (r >= 0)
r = m_config_set_option_raw(config, co, &val, flags);
if (mp_msg_test(config->log, MSGL_V)) {
char *s = m_option_type_node.print(NULL, data);
MP_DBG(config, "Setting option '%.*s' = %s (flags = %d) -> %d\n",
BSTR_P(name), s ? s : "?", flags, r);
talloc_free(s);
}
m_option_free(co->opt, &val);
return r;
}
int m_config_option_requires_param(struct m_config *config, bstr name)
{
bool negate;
int flags;
struct m_config_option *co =
m_config_mogrify_cli_opt(config, &name, &negate, &flags);
if (!co)
return M_OPT_UNKNOWN;
if (negate || (flags & M_OPT_TYPE_OPTIONAL_PARAM))
return 0;
return m_option_required_params(co->opt);
}
static int sort_opt_compare(const void *pa, const void *pb)
{
const struct m_config_option *a = pa;
const struct m_config_option *b = pb;
return strcasecmp(a->name, b->name);
}
void m_config_print_option_list(const struct m_config *config, const char *name)
{
char min[50], max[50];
int count = 0;
const char *prefix = config->is_toplevel ? "--" : "";
struct m_config_option *sorted =
talloc_memdup(NULL, config->opts, config->num_opts * sizeof(sorted[0]));
if (config->is_toplevel)
qsort(sorted, config->num_opts, sizeof(sorted[0]), sort_opt_compare);
MP_INFO(config, "Options:\n\n");
for (int i = 0; i < config->num_opts; i++) {
struct m_config_option *co = &sorted[i];
const struct m_option *opt = co->opt;
if (co->is_hidden)
continue;
if (strcmp(name, "*") != 0 && !strstr(co->name, name))
continue;
MP_INFO(config, " %s%-30s", prefix, co->name);
if (opt->type == &m_option_type_choice) {
MP_INFO(config, " Choices:");
struct m_opt_choice_alternatives *alt = opt->priv;
for (int n = 0; alt[n].name; n++)
MP_INFO(config, " %s", alt[n].name);
if (opt->flags & (M_OPT_MIN | M_OPT_MAX))
MP_INFO(config, " (or an integer)");
} else {
MP_INFO(config, " %s", opt->type->name);
}
if (opt->flags & (M_OPT_MIN | M_OPT_MAX)) {
snprintf(min, sizeof(min), "any");
snprintf(max, sizeof(max), "any");
if (opt->flags & M_OPT_MIN)
snprintf(min, sizeof(min), "%.14g", opt->min);
if (opt->flags & M_OPT_MAX)
snprintf(max, sizeof(max), "%.14g", opt->max);
MP_INFO(config, " (%s to %s)", min, max);
}
char *def = NULL;
if (co->default_data)
def = m_option_pretty_print(opt, co->default_data);
if (def) {
MP_INFO(config, " (default: %s)", def);
talloc_free(def);
}
if (opt->flags & M_OPT_NOCFG)
MP_INFO(config, " [not in config files]");
if (opt->flags & M_OPT_FILE)
MP_INFO(config, " [file]");
if (opt->flags & M_OPT_FIXED)
MP_INFO(config, " [no runtime changes]");
if (opt->type == &m_option_type_alias)
MP_INFO(config, " for %s", (char *)opt->priv);
if (opt->type == &m_option_type_cli_alias)
MP_INFO(config, " for %s (CLI/config files only)", (char *)opt->priv);
MP_INFO(config, "\n");
for (int n = 0; opt->type->actions && opt->type->actions[n].name; n++) {
const struct m_option_action *action = &opt->type->actions[n];
MP_INFO(config, " %s%s-%s\n", prefix, co->name, action->name);
count++;
}
count++;
}
MP_INFO(config, "\nTotal: %d options\n", count);
talloc_free(sorted);
}
char **m_config_list_options(void *ta_parent, const struct m_config *config)
{
char **list = talloc_new(ta_parent);
int count = 0;
for (int i = 0; i < config->num_opts; i++) {
struct m_config_option *co = &config->opts[i];
if (co->is_hidden)
continue;
// For use with CONF_TYPE_STRING_LIST, it's important not to set list
// as allocation parent.
char *s = talloc_strdup(ta_parent, co->name);
MP_TARRAY_APPEND(ta_parent, list, count, s);
}
MP_TARRAY_APPEND(ta_parent, list, count, NULL);
return list;
}
struct m_profile *m_config_get_profile(const struct m_config *config, bstr name)
{
for (struct m_profile *p = config->profiles; p; p = p->next) {
if (bstr_equals0(name, p->name))
return p;
}
return NULL;
}
struct m_profile *m_config_get_profile0(const struct m_config *config,
char *name)
{
return m_config_get_profile(config, bstr0(name));
}
struct m_profile *m_config_add_profile(struct m_config *config, char *name)
{
if (!name || !name[0])
name = "default";
struct m_profile *p = m_config_get_profile0(config, name);
if (p)
return p;
p = talloc_zero(config, struct m_profile);
p->name = talloc_strdup(p, name);
p->next = config->profiles;
config->profiles = p;
return p;
}
void m_profile_set_desc(struct m_profile *p, bstr desc)
{
talloc_free(p->desc);
p->desc = bstrto0(p, desc);
}
int m_config_set_profile_option(struct m_config *config, struct m_profile *p,
bstr name, bstr val)
{
int i = m_config_set_option_cli(config, name, val,
M_SETOPT_CHECK_ONLY |
M_SETOPT_FROM_CONFIG_FILE);
if (i < 0)
return i;
p->opts = talloc_realloc(p, p->opts, char *, 2 * (p->num_opts + 2));
p->opts[p->num_opts * 2] = bstrto0(p, name);
p->opts[p->num_opts * 2 + 1] = bstrto0(p, val);
p->num_opts++;
p->opts[p->num_opts * 2] = p->opts[p->num_opts * 2 + 1] = NULL;
return 1;
}
int m_config_set_profile(struct m_config *config, char *name, int flags)
{
struct m_profile *p = m_config_get_profile0(config, name);
if (!p) {
MP_WARN(config, "Unknown profile '%s'.\n", name);
return M_OPT_INVALID;
}
if (config->profile_depth > MAX_PROFILE_DEPTH) {
MP_WARN(config, "WARNING: Profile inclusion too deep.\n");
return M_OPT_INVALID;
}
config->profile_depth++;
for (int i = 0; i < p->num_opts; i++) {
m_config_set_option_cli(config,
bstr0(p->opts[2 * i]),
bstr0(p->opts[2 * i + 1]),
flags | M_SETOPT_FROM_CONFIG_FILE);
}
config->profile_depth--;
return 0;
}
void m_config_finish_default_profile(struct m_config *config, int flags)
{
struct m_profile *p = m_config_add_profile(config, NULL);
m_config_set_profile(config, p->name, flags);
p->num_opts = 0;
}
struct mpv_node m_config_get_profiles(struct m_config *config)
{
struct mpv_node root;
node_init(&root, MPV_FORMAT_NODE_ARRAY, NULL);
for (m_profile_t *profile = config->profiles; profile; profile = profile->next)
{
struct mpv_node *entry = node_array_add(&root, MPV_FORMAT_NODE_MAP);
node_map_add_string(entry, "name", profile->name);
if (profile->desc)
node_map_add_string(entry, "profile-desc", profile->desc);
struct mpv_node *opts =
node_map_add(entry, "options", MPV_FORMAT_NODE_ARRAY);
for (int n = 0; n < profile->num_opts; n++) {
struct mpv_node *opt_entry = node_array_add(opts, MPV_FORMAT_NODE_MAP);
node_map_add_string(opt_entry, "key", profile->opts[n * 2 + 0]);
node_map_add_string(opt_entry, "value", profile->opts[n * 2 + 1]);
}
}
return root;
}
void m_config_create_shadow(struct m_config *config)
{
assert(config->global && config->options && config->size);
assert(!config->shadow && !config->global->config);
config->shadow = talloc_zero(config, struct m_config_shadow);
config->shadow->data = talloc_zero_size(config->shadow, config->shadow_size);
config->shadow->root = config;
pthread_mutex_init(&config->shadow->lock, NULL);
config->global->config = config->shadow;
for (int n = 0; n < config->num_opts; n++) {
struct m_config_option *co = &config->opts[n];
if (co->shadow_offset < 0)
continue;
m_option_copy(co->opt, config->shadow->data + co->shadow_offset, co->data);
}
}
// Return whether parent is a parent of group. Also returns true if they're equal.
static bool is_group_included(struct m_config *config, int group, int parent)
{
for (;;) {
if (group == parent)
return true;
if (group < 0)
break;
group = config->groups[group].parent_group;
}
return false;
}
static void cache_destroy(void *p)
{
struct m_config_cache *cache = p;
// (technically speaking, being able to call them both without anything
// breaking is a feature provided by these functions)
m_config_cache_set_wakeup_cb(cache, NULL, NULL);
m_config_cache_set_dispatch_change_cb(cache, NULL, NULL, NULL);
}
struct m_config_cache *m_config_cache_alloc(void *ta_parent,
struct mpv_global *global,
const struct m_sub_options *group)
{
struct m_config_shadow *shadow = global->config;
struct m_config *root = shadow->root;
struct m_config_cache *cache = talloc_zero(ta_parent, struct m_config_cache);
talloc_set_destructor(cache, cache_destroy);
cache->shadow = shadow;
cache->shadow_config = m_config_new(cache, mp_null_log, root->size,
root->defaults, root->options);
struct m_config *config = cache->shadow_config;
assert(config->num_opts == root->num_opts);
for (int n = 0; n < root->num_opts; n++) {
assert(config->opts[n].opt->type == root->opts[n].opt->type);
assert(config->opts[n].shadow_offset == root->opts[n].shadow_offset);
}
cache->ts = -1;
cache->group = -1;
for (int n = 0; n < config->num_groups; n++) {
if (config->groups[n].group == group) {
cache->opts = config->groups[n].opts;
cache->group = n;
break;
}
}
assert(cache->group >= 0);
assert(cache->opts);
// If we're not on the top-level, restrict set of options to the sub-group
// to reduce update costs. (It would be better not to add them in the first
// place.)
if (cache->group > 0) {
int num_opts = config->num_opts;
config->num_opts = 0;
for (int n = 0; n < num_opts; n++) {
struct m_config_option *co = &config->opts[n];
if (is_group_included(config, co->group, cache->group)) {
config->opts[config->num_opts++] = *co;
} else {
m_option_free(co->opt, co->data);
}
}
for (int n = 0; n < config->num_groups; n++) {
if (!is_group_included(config, n, cache->group))
TA_FREEP(&config->groups[n].opts);
}
}
m_config_cache_update(cache);
return cache;
}
bool m_config_cache_update(struct m_config_cache *cache)
{
struct m_config_shadow *shadow = cache->shadow;
// Using atomics and checking outside of the lock - it's unknown whether
// this makes it faster or slower. Just cargo culting it.
if (atomic_load(&shadow->root->groups[cache->group].ts) <= cache->ts)
return false;
pthread_mutex_lock(&shadow->lock);
cache->ts = atomic_load(&shadow->root->groups[cache->group].ts);
for (int n = 0; n < cache->shadow_config->num_opts; n++) {
struct m_config_option *co = &cache->shadow_config->opts[n];
if (co->shadow_offset >= 0)
m_option_copy(co->opt, co->data, shadow->data + co->shadow_offset);
}
pthread_mutex_unlock(&shadow->lock);
return true;
}
void m_config_notify_change_co(struct m_config *config,
struct m_config_option *co)
{
struct m_config_shadow *shadow = config->shadow;
if (shadow) {
pthread_mutex_lock(&shadow->lock);
if (co->shadow_offset >= 0)
m_option_copy(co->opt, shadow->data + co->shadow_offset, co->data);
pthread_mutex_unlock(&shadow->lock);
}
int changed = co->opt->flags & UPDATE_OPTS_MASK;
int group = co->group;
while (group >= 0) {
struct m_config_group *g = &config->groups[group];
atomic_fetch_add(&g->ts, 1);
if (g->group)
changed |= g->group->change_flags;
group = g->parent_group;
}
if (shadow) {
pthread_mutex_lock(&shadow->lock);
for (int n = 0; n < shadow->num_listeners; n++) {
struct m_config_cache *cache = shadow->listeners[n];
if (cache->wakeup_cb)
cache->wakeup_cb(cache->wakeup_cb_ctx);
}
pthread_mutex_unlock(&shadow->lock);
}
if (config->option_change_callback) {
config->option_change_callback(config->option_change_callback_ctx, co,
changed);
}
}
void m_config_notify_change_opt_ptr(struct m_config *config, void *ptr)
{
for (int n = 0; n < config->num_opts; n++) {
struct m_config_option *co = &config->opts[n];
if (co->data == ptr) {
m_config_notify_change_co(config, co);
return;
}
}
// ptr doesn't point to any config->optstruct field declared in the
// option list?
assert(false);
}
void m_config_cache_set_wakeup_cb(struct m_config_cache *cache,
void (*cb)(void *ctx), void *cb_ctx)
{
struct m_config_shadow *shadow = cache->shadow;
pthread_mutex_lock(&shadow->lock);
if (cache->in_list) {
for (int n = 0; n < shadow->num_listeners; n++) {
if (shadow->listeners[n] == cache)
MP_TARRAY_REMOVE_AT(shadow->listeners, shadow->num_listeners, n);
}
if (!shadow->num_listeners) {
talloc_free(shadow->listeners);
shadow->listeners = NULL;
}
}
if (cb) {
MP_TARRAY_APPEND(NULL, shadow->listeners, shadow->num_listeners, cache);
cache->in_list = true;
cache->wakeup_cb = cb;
cache->wakeup_cb_ctx = cb_ctx;
}
pthread_mutex_unlock(&shadow->lock);
}
static void dispatch_notify(void *p)
{
struct m_config_cache *cache = p;
assert(cache->wakeup_dispatch_queue);
mp_dispatch_enqueue_notify(cache->wakeup_dispatch_queue,
cache->wakeup_dispatch_cb,
cache->wakeup_dispatch_cb_ctx);
}
void m_config_cache_set_dispatch_change_cb(struct m_config_cache *cache,
struct mp_dispatch_queue *dispatch,
void (*cb)(void *ctx), void *cb_ctx)
{
// Remove the old one is tricky. Firts make sure no new notifications will
// come.
m_config_cache_set_wakeup_cb(cache, NULL, NULL);
// Remove any pending notifications (assume we're on the same thread as
// any potential mp_dispatch_queue_process() callers).
if (cache->wakeup_dispatch_queue) {
mp_dispatch_cancel_fn(cache->wakeup_dispatch_queue,
cache->wakeup_dispatch_cb,
cache->wakeup_dispatch_cb_ctx);
}
cache->wakeup_dispatch_queue = NULL;
cache->wakeup_dispatch_cb = NULL;
cache->wakeup_dispatch_cb_ctx = NULL;
if (cb) {
cache->wakeup_dispatch_queue = dispatch;
cache->wakeup_dispatch_cb = cb;
cache->wakeup_dispatch_cb_ctx = cb_ctx;
m_config_cache_set_wakeup_cb(cache, dispatch_notify, cache);
}
}
bool m_config_is_in_group(struct m_config *config,
const struct m_sub_options *group,
struct m_config_option *co)
{
for (int n = 0; n < config->num_groups; n++) {
if (config->groups[n].group == group)
return is_group_included(config, co->group, n);
}
return false;
}
void *mp_get_config_group(void *ta_parent, struct mpv_global *global,
const struct m_sub_options *group)
{
struct m_config_cache *cache = m_config_cache_alloc(NULL, global, group);
// Make talloc_free(cache->opts) free the entire cache.
ta_set_parent(cache->opts, ta_parent);
ta_set_parent(cache, cache->opts);
return cache->opts;
}
void mp_read_option_raw(struct mpv_global *global, const char *name,
const struct m_option_type *type, void *dst)
{
struct m_config_shadow *shadow = global->config;
struct m_config_option *co = m_config_get_co_raw(shadow->root, bstr0(name));
assert(co);
assert(co->shadow_offset >= 0);
assert(co->opt->type == type);
memset(dst, 0, co->opt->type->size);
m_option_copy(co->opt, dst, shadow->data + co->shadow_offset);
}
struct m_config *mp_get_root_config(struct mpv_global *global)
{
return global->config->root;
}
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