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Diffstat (limited to '')
| -rw-r--r-- | src/modules/module-metadata/metadata.c | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/src/modules/module-metadata/metadata.c b/src/modules/module-metadata/metadata.c new file mode 100644 index 0000000..d863bea --- /dev/null +++ b/src/modules/module-metadata/metadata.c @@ -0,0 +1,316 @@ +/* PipeWire + * + * Copyright © 2019 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include <spa/utils/result.h> + +#include <pipewire/impl.h> + +#include <pipewire/extensions/metadata.h> + +#define NAME "metadata" + +struct impl { + struct spa_hook context_listener; + + struct pw_global *global; + struct spa_hook global_listener; + + struct pw_metadata *metadata; + struct pw_resource *resource; + struct spa_hook resource_listener; + int pending; +}; + +struct resource_data { + struct impl *impl; + + struct pw_resource *resource; + struct spa_hook resource_listener; + struct spa_hook object_listener; + struct spa_hook metadata_listener; + struct spa_hook impl_resource_listener; + int pong_seq; +}; + +#define pw_metadata_resource(r,m,v,...) \ + pw_resource_call_res(r,struct pw_metadata_events,m,v,__VA_ARGS__) + +#define pw_metadata_resource_property(r,...) \ + pw_metadata_resource(r,property,0,__VA_ARGS__) + +static int metadata_property(void *data, + uint32_t subject, + const char *key, + const char *type, + const char *value) +{ + struct resource_data *d = data; + struct pw_resource *resource = d->resource; + struct pw_impl_client *client = pw_resource_get_client(resource); + struct impl *impl = d->impl; + + if (impl->pending == 0 || d->pong_seq != 0) { + if (pw_impl_client_check_permissions(client, subject, PW_PERM_R) >= 0) + pw_metadata_resource_property(d->resource, subject, key, type, value); + } + return 0; +} + +static const struct pw_metadata_events metadata_events = { + PW_VERSION_METADATA_EVENTS, + .property = metadata_property, +}; + +static int metadata_set_property(void *object, + uint32_t subject, + const char *key, + const char *type, + const char *value) +{ + struct resource_data *d = object; + struct impl *impl = d->impl; + struct pw_resource *resource = d->resource; + struct pw_impl_client *client = pw_resource_get_client(resource); + int res; + + if ((res = pw_impl_client_check_permissions(client, subject, PW_PERM_R | PW_PERM_M)) < 0) + goto error; + + pw_metadata_set_property(impl->metadata, subject, key, type, value); + return 0; + +error: + pw_resource_errorf(resource, res, "set property error for id %d: %s", + subject, spa_strerror(res)); + return res; +} + +static int metadata_clear(void *object) +{ + struct resource_data *d = object; + struct impl *impl = d->impl; + pw_metadata_clear(impl->metadata); + return 0; +} + +static const struct pw_metadata_methods metadata_methods = { + PW_VERSION_METADATA_METHODS, + .set_property = metadata_set_property, + .clear = metadata_clear, +}; + + +static void global_unbind(void *data) +{ + struct resource_data *d = data; + if (d->resource) { + spa_hook_remove(&d->resource_listener); + spa_hook_remove(&d->object_listener); + spa_hook_remove(&d->metadata_listener); + spa_hook_remove(&d->impl_resource_listener); + } +} + +static const struct pw_resource_events resource_events = { + PW_VERSION_RESOURCE_EVENTS, + .destroy = global_unbind, +}; + +static void remove_pending(struct resource_data *d) +{ + if (d->pong_seq != 0) { + pw_impl_client_set_busy(pw_resource_get_client(d->resource), false); + d->pong_seq = 0; + d->impl->pending--; + } +} + +static void impl_resource_destroy(void *data) +{ + struct resource_data *d = data; + remove_pending(d); +} + +static void impl_resource_pong(void *data, int seq) +{ + struct resource_data *d = data; + if (d->pong_seq == seq) + remove_pending(d); +} + +static const struct pw_resource_events impl_resource_events = { + PW_VERSION_RESOURCE_EVENTS, + .destroy = impl_resource_destroy, + .pong = impl_resource_pong, +}; + +static int +global_bind(void *object, struct pw_impl_client *client, uint32_t permissions, + uint32_t version, uint32_t id) +{ + struct impl *impl = object; + struct pw_resource *resource; + struct resource_data *data; + + resource = pw_resource_new(client, id, permissions, PW_TYPE_INTERFACE_Metadata, version, sizeof(*data)); + if (resource == NULL) + return -errno; + + data = pw_resource_get_user_data(resource); + data->impl = impl; + data->resource = resource; + + pw_global_add_resource(impl->global, resource); + + /* listen for when the resource goes away */ + pw_resource_add_listener(resource, + &data->resource_listener, + &resource_events, data); + + /* resource methods -> implementation */ + pw_resource_add_object_listener(resource, + &data->object_listener, + &metadata_methods, data); + + pw_impl_client_set_busy(client, true); + + /* implementation events -> resource */ + pw_metadata_add_listener(impl->metadata, + &data->metadata_listener, + &metadata_events, data); + + pw_resource_add_listener(impl->resource, + &data->impl_resource_listener, + &impl_resource_events, data); + + data->pong_seq = pw_resource_ping(impl->resource, data->pong_seq); + impl->pending++; + + return 0; +} + +static void global_destroy(void *data) +{ + struct impl *impl = data; + spa_hook_remove(&impl->global_listener); + impl->global = NULL; + if (impl->resource) + pw_resource_destroy(impl->resource); +} + +static const struct pw_global_events global_events = { + PW_VERSION_GLOBAL_EVENTS, + .destroy = global_destroy, +}; + + +static void context_global_removed(void *data, struct pw_global *global) +{ + struct impl *impl = data; + pw_metadata_set_property(impl->metadata, + pw_global_get_id(global), NULL, NULL, NULL); +} + +static const struct pw_context_events context_events = { + PW_VERSION_CONTEXT_EVENTS, + .global_removed = context_global_removed, +}; + +static void global_resource_destroy(void *data) +{ + struct impl *impl = data; + spa_hook_remove(&impl->context_listener); + spa_hook_remove(&impl->resource_listener); + impl->resource = NULL; + impl->metadata = NULL; + if (impl->global) + pw_global_destroy(impl->global); + free(impl); +} + +static const struct pw_resource_events global_resource_events = { + PW_VERSION_RESOURCE_EVENTS, + .destroy = global_resource_destroy, +}; + +void * +pw_metadata_new(struct pw_context *context, struct pw_resource *resource, + struct pw_properties *properties) +{ + struct impl *impl; + char serial_str[32]; + struct spa_dict_item items[1] = { + SPA_DICT_ITEM_INIT(PW_KEY_OBJECT_SERIAL, serial_str), + }; + struct spa_dict extra_props = SPA_DICT_INIT_ARRAY(items); + static const char * const keys[] = { + PW_KEY_OBJECT_SERIAL, + NULL + }; + + if (properties == NULL) + properties = pw_properties_new(NULL, NULL); + if (properties == NULL) + return NULL; + + impl = calloc(1, sizeof(*impl)); + if (impl == NULL) { + pw_properties_free(properties); + return NULL; + } + + pw_resource_install_marshal(resource, true); + + impl->global = pw_global_new(context, + PW_TYPE_INTERFACE_Metadata, + PW_VERSION_METADATA, + properties, + global_bind, impl); + if (impl->global == NULL) { + free(impl); + return NULL; + } + impl->resource = resource; + impl->metadata = (struct pw_metadata*)resource; + + spa_scnprintf(serial_str, sizeof(serial_str), "%"PRIu64, + pw_global_get_serial(impl->global)); + pw_global_update_keys(impl->global, &extra_props, keys); + + pw_context_add_listener(context, &impl->context_listener, + &context_events, impl); + + pw_global_add_listener(impl->global, + &impl->global_listener, + &global_events, impl); + + pw_resource_set_bound_id(resource, pw_global_get_id(impl->global)); + pw_global_register(impl->global); + + pw_resource_add_listener(resource, + &impl->resource_listener, + &global_resource_events, impl); + + return impl; +} |