Implement the CLAP log extension

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

@@ -25,6 +25,8 @@ ClapHostExtensions::ClapHostExtensions(const clap_host& host) noexcept
           host.get_extension(&host, CLAP_EXT_GUI))),
       latency(static_cast<const clap_host_latency_t*>(
           host.get_extension(&host, CLAP_EXT_LATENCY))),
+      log(static_cast<const clap_host_log_t*>(
+          host.get_extension(&host, CLAP_EXT_LOG))),
       note_ports(static_cast<const clap_host_note_ports_t*>(
           host.get_extension(&host, CLAP_EXT_NOTE_PORTS))),
       params(static_cast<const clap_host_params_t*>(
@@ -42,6 +44,7 @@ clap::host::SupportedHostExtensions ClapHostExtensions::supported()
         .supports_audio_ports = audio_ports != nullptr,
         .supports_gui = gui != nullptr,
         .supports_latency = latency != nullptr,
+        .supports_log = log != nullptr,
         .supports_note_ports = note_ports != nullptr,
         .supports_params = params != nullptr,
         .supports_state = state != nullptr,

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

@@ -23,6 +23,7 @@
 #include <clap/ext/audio-ports.h>
 #include <clap/ext/gui.h>
 #include <clap/ext/latency.h>
+#include <clap/ext/log.h>
 #include <clap/ext/note-ports.h>
 #include <clap/ext/params.h>
 #include <clap/ext/state.h>
@@ -65,6 +66,7 @@ struct ClapHostExtensions {
     const clap_host_audio_ports_t* audio_ports = nullptr;
     const clap_host_gui_t* gui = nullptr;
     const clap_host_latency_t* latency = nullptr;
+    const clap_host_log_t* log = nullptr;
     const clap_host_note_ports_t* note_ports = nullptr;
     const clap_host_params_t* params = nullptr;
     const clap_host_state_t* state = nullptr;

src/plugin/bridges/clap.cpp

@@ -346,6 +346,17 @@ void ClapPluginBridge::register_plugin_proxy(
                     //        hell. I haven't been able to figure out why.
                     return {};
                 },
+                [&](const clap::ext::log::host::Log& request)
+                    -> clap::ext::log::host::Log::Response {
+                    const auto& [plugin_proxy, _] =
+                        get_proxy(request.owner_instance_id);
+
+                    plugin_proxy.host_extensions_.log->log(plugin_proxy.host_,
+                                                           request.severity,
+                                                           request.msg.c_str());
+
+                    return Ack{};
+                },
                 [&](const clap::ext::params::host::RequestFlush& request)
                     -> clap::ext::params::host::RequestFlush::Response {
                     const auto& [plugin_proxy, _] =