diff options
Diffstat (limited to 'slv2')
| -rw-r--r-- | slv2/slv2.h | 62 |
1 files changed, 56 insertions, 6 deletions
diff --git a/slv2/slv2.h b/slv2/slv2.h index b5de35b..62ea105 100644 --- a/slv2/slv2.h +++ b/slv2/slv2.h @@ -1306,11 +1306,62 @@ slv2_ui_instantiate(SLV2Plugin plugin, const LV2_Feature* const* features); /** + A UI host descriptor. + + A UI host descriptor contains the various functions that a plugin UI may + use to communicate with the plugin. It is passed to @ref + slv2_ui_instance_new to provide these functions to the UI. +*/ +typedef struct _SLV2UIHost* SLV2UIHost; + +typedef uint32_t (*SLV2PortIndexFunction)(LV2UI_Controller controller, + const char* port_symbol); + +typedef uint32_t (*SLV2PortSubscribeFunction)(LV2UI_Controller controller, + uint32_t port_index, + uint32_t protocol); + +typedef uint32_t (*SLV2PortUnsubscribeFunction)(LV2UI_Controller controller, + uint32_t port_index, + uint32_t protocol); + +/** + Create a new UI host descriptor. + + @param controller Opaque host pointer passed to each function. + @param write_function Function to send a value to a plugin port. + @param port_index_function Function to get the index for a port by symbol. + @param port_subscribe_function Function to subscribe to port updates. + @param port_unsubscribe_function Function to unsubscribe from port updates. +*/ +SLV2_API +SLV2UIHost +slv2_ui_host_new(LV2UI_Controller controller, + LV2UI_Write_Function write_function, + SLV2PortIndexFunction port_index_function, + SLV2PortSubscribeFunction port_subscribe_function, + SLV2PortUnsubscribeFunction port_unsubscribe_function); + +/** + Free @a ui_host. +*/ +SLV2_API +void +slv2_ui_host_free(SLV2UIHost ui_host); + +/** Instantiate a plugin UI. - The returned object represents shared library objects loaded into memory, - it must be cleaned up with slv2_ui_instance_free when no longer - needed. - + + The returned object represents shared library objects loaded into memory, it + must be cleaned up with slv2_ui_instance_free when no longer needed. The + returned object does not refer to @a ui_host directly (though it of course + refers to the fields of @a ui_host themselves), so @a ui_host may safely be + freed any time after this call. + + @param plugin The plugin this UI is for. + @param ui The plugin UI to instantiate. + @param widget_type_uri The type of the desired widget. + @param ui_host UI host descriptor (callbacks). @param features NULL-terminated array of features the host supports. NULL may be passed if the host supports no additional features. @@ -1321,8 +1372,7 @@ SLV2UIInstance slv2_ui_instance_new(SLV2Plugin plugin, SLV2UI ui, SLV2Value widget_type_uri, - LV2UI_Write_Function write_function, - LV2UI_Controller controller, + SLV2UIHost ui_host, const LV2_Feature* const* features); /** |