Implement the voice-info CLAP extension

src/wine-host/bridges/clap-impls/host-proxy.cpp

@@ -84,6 +84,9 @@ clap_host_proxy::clap_host_proxy(ClapBridge& bridge,
       ext_thread_check_vtable(clap_host_thread_check_t{
           .is_main_thread = ext_thread_check_is_main_thread,
           .is_audio_thread = ext_thread_check_is_audio_thread,
+      }),
+      ext_voice_info_vtable(clap_host_voice_info_t{
+          .changed = ext_voice_info_changed,
       }) {}
 
 const void* CLAP_ABI
@@ -122,6 +125,9 @@ clap_host_proxy::host_get_extension(const struct clap_host* host,
     } else if (strcmp(extension_id, CLAP_EXT_THREAD_CHECK) == 0) {
         // This extension doesn't require any bridging
         extension_ptr = &self->ext_thread_check_vtable;
+    } else if (self->supported_extensions_.supports_voice_info &&
+               strcmp(extension_id, CLAP_EXT_VOICE_INFO) == 0) {
+        extension_ptr = &self->ext_voice_info_vtable;
     }
 
     self->bridge_.logger_.log_extension_query("clap_host::get_extension",
@@ -432,3 +438,11 @@ clap_host_proxy::ext_thread_check_is_audio_thread(const clap_host_t* host) {
     // do audio thread stuff on the GUI thread everything's fine
     return !self->bridge_.main_context_.is_gui_thread();
 }
+
+void CLAP_ABI clap_host_proxy::ext_voice_info_changed(const clap_host_t* host) {
+    assert(host && host->host_data);
+    auto self = static_cast<const clap_host_proxy*>(host->host_data);
+
+    self->bridge_.send_main_thread_message(clap::ext::voice_info::host::Changed{
+        .owner_instance_id = self->owner_instance_id()});
+}

src/wine-host/bridges/clap-impls/host-proxy.h

@@ -27,6 +27,7 @@
 #include <clap/ext/state.h>
 #include <clap/ext/tail.h>
 #include <clap/ext/thread-check.h>
+#include <clap/ext/voice-info.h>
 #include <clap/host.h>
 
 #include "../../common/serialization/clap/plugin-factory.h"
@@ -121,6 +122,8 @@ class clap_host_proxy {
     static bool CLAP_ABI
     ext_thread_check_is_audio_thread(const clap_host_t* host);
 
+    static void CLAP_ABI ext_voice_info_changed(const clap_host_t* host);
+
    private:
     ClapBridge& bridge_;
     size_t owner_instance_id_;
@@ -149,6 +152,7 @@ class clap_host_proxy {
     const clap_host_tail_t ext_tail_vtable;
     // This is always available regardless of the proxied host
     const clap_host_thread_check_t ext_thread_check_vtable;
+    const clap_host_voice_info_t ext_voice_info_vtable;
 
     /**
      * Keeps track of whether there are pending host callbacks. Used to prevent

src/wine-host/bridges/clap.cpp

@@ -40,7 +40,9 @@ ClapPluginExtensions::ClapPluginExtensions(const clap_plugin& plugin) noexcept
       state(static_cast<const clap_plugin_state_t*>(
           plugin.get_extension(&plugin, CLAP_EXT_STATE))),
       tail(static_cast<const clap_plugin_tail_t*>(
-          plugin.get_extension(&plugin, CLAP_EXT_TAIL))) {}
+          plugin.get_extension(&plugin, CLAP_EXT_TAIL))),
+      voice_info(static_cast<const clap_plugin_voice_info_t*>(
+          plugin.get_extension(&plugin, CLAP_EXT_VOICE_INFO))) {}
 
 ClapPluginExtensions::ClapPluginExtensions() noexcept {}
 
@@ -53,7 +55,8 @@ clap::plugin::SupportedPluginExtensions ClapPluginExtensions::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};
 }
 
 ClapPluginInstance::ClapPluginInstance(
@@ -736,6 +739,25 @@ void ClapBridge::run() {
                     })
                     .get();
             },
+            [&](clap::ext::voice_info::plugin::Get& request)
+                -> clap::ext::voice_info::plugin::Get::Response {
+                const auto& [instance, _] = get_instance(request.instance_id);
+
+                return main_context_
+                    .run_in_context([&, plugin = instance.plugin.get(),
+                                     voice_info =
+                                         instance.extensions.voice_info]() {
+                        clap_voice_info_t info{};
+                        if (voice_info->get(plugin, &info)) {
+                            return clap::ext::voice_info::plugin::GetResponse{
+                                .result = std::move(info)};
+                        } else {
+                            return clap::ext::voice_info::plugin::GetResponse{
+                                .result = std::nullopt};
+                        }
+                    })
+                    .get();
+            },
         });
 }
 

src/wine-host/bridges/clap.h

@@ -73,6 +73,7 @@ struct ClapPluginExtensions {
     const clap_plugin_params_t* params = nullptr;
     const clap_plugin_state_t* state = nullptr;
     const clap_plugin_tail_t* tail = nullptr;
+    const clap_plugin_voice_info_t* voice_info = nullptr;
 };
 
 /**