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metadata: add support for initial metadata

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Add a metadata.values property that is used to fill the metadata store
with initial values.

Fixes #3076
This commit is contained in:
Wim Taymans 2023-04-14 15:07:26 +02:00
parent ccd118368e
commit f318edb699
4 changed files with 85 additions and 2 deletions
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65
src/modules/module-metadata.c
View file

@ -10,6 +10,7 @@
#include "config.h"
#include <spa/utils/result.h>
#include <spa/utils/json.h>
#include <pipewire/impl.h>
#include <pipewire/extensions/metadata.h>
@ -19,6 +20,12 @@
#define NAME "metadata"
#define FACTORY_USAGE "("PW_KEY_METADATA_NAME" = <name> ) " \
"("PW_KEY_METADATA_VALUES" = [ " \
" { ( id = <int> ) key = <string> ( type = <string> ) value = <json> } " \
" ..." \
" ] )"
PW_LOG_TOPIC_STATIC(mod_topic, "mod." NAME);
#define PW_LOG_TOPIC_DEFAULT mod_topic
@ -47,6 +54,56 @@ struct factory_data {
struct pw_export_type export_metadata;
};
/*
* [
* { ( "id" = <int>, ) "key" = <string> ("type" = <string>) "value" = <json> }
* ....
* ]
*/
static int fill_metadata(struct pw_metadata *metadata, const char *str)
{
struct spa_json it[3];
spa_json_init(&it[0], str, strlen(str));
if (spa_json_enter_array(&it[0], &it[1]) <= 0)
return -EINVAL;
while (spa_json_enter_object(&it[1], &it[2]) > 0) {
char key[256], *k = NULL, *v = NULL, *t = NULL;
int id = 0;
while (spa_json_get_string(&it[2], key, sizeof(key)) > 0) {
int len;
const char *val;
if ((len = spa_json_next(&it[2], &val)) <= 0)
return -EINVAL;
if (spa_streq(key, "id")) {
if (spa_json_parse_int(val, len, &id) <= 0)
return -EINVAL;
} else if (spa_streq(key, "key")) {
if ((k = malloc(len+1)) != NULL)
spa_json_parse_stringn(val, len, k, len+1);
} else if (spa_streq(key, "type")) {
if ((t = malloc(len+1)) != NULL)
spa_json_parse_stringn(val, len, t, len+1);
} else if (spa_streq(key, "value")) {
if (spa_json_is_container(val, len))
len = spa_json_container_len(&it[2], val, len);
if ((v = malloc(len+1)) != NULL)
spa_json_parse_stringn(val, len, v, len+1);
}
}
if (k != NULL && v != NULL)
pw_metadata_set_property(metadata, id, k, t, v);
free(k);
free(v);
free(t);
}
return 0;
}
static void *create_object(void *_data,
struct pw_resource *resource,
const char *type,
@ -59,6 +116,7 @@ static void *create_object(void *_data,
struct pw_metadata *result;
struct pw_resource *metadata_resource = NULL;
struct pw_impl_client *client = resource ? pw_resource_get_client(resource) : NULL;
const char *str;
int res;
if (properties == NULL)
@ -102,6 +160,9 @@ static void *create_object(void *_data,
pw_impl_metadata_register(impl, NULL);
result = pw_impl_metadata_get_implementation(impl);
}
if ((str = pw_properties_get(properties, PW_KEY_METADATA_VALUES)) != NULL)
fill_metadata(result, str);
return result;
error_resource:
@ -192,7 +253,9 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
"metadata",
PW_TYPE_INTERFACE_Metadata,
PW_VERSION_METADATA,
NULL,
pw_properties_new(
PW_KEY_FACTORY_USAGE, FACTORY_USAGE,
NULL),
sizeof(*data));
if (factory == NULL)
return -errno;