Implement the voice-info CLAP extension

src/plugin/bridges/clap-impls/plugin-proxy.cpp

@@ -34,7 +34,9 @@ ClapHostExtensions::ClapHostExtensions(const clap_host& host) noexcept
       state(static_cast<const clap_host_state_t*>(
           host.get_extension(&host, CLAP_EXT_STATE))),
       tail(static_cast<const clap_host_tail_t*>(
-          host.get_extension(&host, CLAP_EXT_TAIL))) {}
+          host.get_extension(&host, CLAP_EXT_TAIL))),
+      voice_info(static_cast<const clap_host_voice_info_t*>(
+          host.get_extension(&host, CLAP_EXT_VOICE_INFO))) {}
 
 ClapHostExtensions::ClapHostExtensions() noexcept {}
 
@@ -48,7 +50,8 @@ clap::host::SupportedHostExtensions ClapHostExtensions::supported()
         .supports_note_ports = note_ports != nullptr,
         .supports_params = params != nullptr,
         .supports_state = state != nullptr,
-        .supports_tail = tail != nullptr};
+        .supports_tail = tail != nullptr,
+        .supports_voice_info = voice_info != nullptr};
 }
 
 clap_plugin_proxy::clap_plugin_proxy(ClapPluginBridge& bridge,
@@ -116,6 +119,9 @@ clap_plugin_proxy::clap_plugin_proxy(ClapPluginBridge& bridge,
       ext_tail_vtable(clap_plugin_tail_t{
           .get = ext_tail_get,
       }),
+      ext_voice_info_vtable(clap_plugin_voice_info_t{
+          .get = ext_voice_info_get,
+      }),
       // These function objects are relatively large, and we probably won't be
       // getting that many of them
       pending_callbacks_(128) {}
@@ -309,6 +315,9 @@ clap_plugin_proxy::plugin_get_extension(const struct clap_plugin* plugin,
     } else if (self->supported_extensions_.supports_tail &&
                strcmp(id, CLAP_EXT_TAIL) == 0) {
         extension_ptr = &self->ext_tail_vtable;
+    } else if (self->supported_extensions_.supports_voice_info &&
+               strcmp(id, CLAP_EXT_VOICE_INFO) == 0) {
+        extension_ptr = &self->ext_voice_info_vtable;
     }
 
     self->bridge_.logger_.log_extension_query("clap_plugin::get_extension",
@@ -757,3 +766,21 @@ uint32_t CLAP_ABI clap_plugin_proxy::ext_tail_get(const clap_plugin_t* plugin) {
     return self->bridge_.send_audio_thread_message(
         clap::ext::tail::plugin::Get{.instance_id = self->instance_id()});
 }
+
+bool CLAP_ABI clap_plugin_proxy::ext_voice_info_get(const clap_plugin_t* plugin,
+                                                    clap_voice_info_t* info) {
+    assert(plugin && plugin->plugin_data && info);
+    auto self = static_cast<const clap_plugin_proxy*>(plugin->plugin_data);
+
+    const clap::ext::voice_info::plugin::GetResponse response =
+        self->bridge_.send_main_thread_message(
+            clap::ext::voice_info::plugin::Get{.instance_id =
+                                                   self->instance_id()});
+    if (response.result) {
+        *info = *response.result;
+
+        return true;
+    } else {
+        return false;
+    }
+}

src/plugin/bridges/clap-impls/plugin-proxy.h

@@ -28,6 +28,7 @@
 #include <clap/ext/params.h>
 #include <clap/ext/state.h>
 #include <clap/ext/tail.h>
+#include <clap/ext/voice-info.h>
 #include <clap/plugin.h>
 #include <rigtorp/MPMCQueue.h>
 #include <function2/function2.hpp>
@@ -71,6 +72,7 @@ struct ClapHostExtensions {
     const clap_host_params_t* params = nullptr;
     const clap_host_state_t* state = nullptr;
     const clap_host_tail_t* tail = nullptr;
+    const clap_host_voice_info_t* voice_info = nullptr;
 };
 
 /**
@@ -263,6 +265,9 @@ class clap_plugin_proxy {
 
     static uint32_t CLAP_ABI ext_tail_get(const clap_plugin_t* plugin);
 
+    static bool CLAP_ABI ext_voice_info_get(const clap_plugin_t* plugin,
+                                            clap_voice_info_t* info);
+
    private:
     ClapPluginBridge& bridge_;
     size_t instance_id_;
@@ -326,6 +331,7 @@ class clap_plugin_proxy {
     const clap_plugin_params_t ext_params_vtable;
     const clap_plugin_state_t ext_state_vtable;
     const clap_plugin_tail_t ext_tail_vtable;
+    const clap_plugin_voice_info_t ext_voice_info_vtable;
 
     /**
      * The extensions supported by the bridged plugin. Set after a successful

src/plugin/bridges/clap.cpp

@@ -259,6 +259,22 @@ ClapPluginBridge::ClapPluginBridge(const ghc::filesystem::path& plugin_path)
 
                     return Ack{};
                 },
+                [&](const clap::ext::voice_info::host::Changed& request)
+                    -> clap::ext::voice_info::host::Changed::Response {
+                    const auto& [plugin_proxy, _] =
+                        get_proxy(request.owner_instance_id);
+
+                    plugin_proxy
+                        .run_on_main_thread(
+                            [&, host = plugin_proxy.host_,
+                             voice_info =
+                                 plugin_proxy.host_extensions_.voice_info]() {
+                                voice_info->changed(host);
+                            })
+                        .wait();
+
+                    return Ack{};
+                },
             });
     });
 }