Fully implement the CLAP tail extension

Trivial extension, but this required us to be able to send audio thread
callbacks first.

src/common/serialization/clap.h

@@ -97,7 +97,8 @@ struct ClapAudioThreadControlRequest {
     using Payload = std::variant<clap::plugin::StartProcessing,
                                  clap::plugin::StopProcessing,
                                  clap::plugin::Reset,
-                                 clap::ext::params::plugin::Flush>;
+                                 clap::ext::params::plugin::Flush,
+                                 clap::ext::tail::plugin::Get>;
 
     Payload payload;
 

src/common/serialization/clap/README.md

@@ -26,7 +26,7 @@ Yabridge currently tracks CLAP 1.1.1. The implementation status for CLAP's core
 | `clap.posix-fd-support`   | :x: Not supported yet |
 | `clap.render`             | :x: Not supported yet |
 | `clap.state`              | :x: Not supported yet |
-| `clap.tail`               | :x: Not supported yet |
+| `clap.tail`               | :heavy_check_mark:    |
 | `clap.thread-check`       | :x: Not supported yet |
 | `clap.thread-pool`        | :x: Not supported yet |
 | `clap.timer-support`      | :x: Not supported yet |

src/common/serialization/clap/host.cpp

@@ -19,6 +19,7 @@
 #include <clap/ext/audio-ports.h>
 #include <clap/ext/note-ports.h>
 #include <clap/ext/params.h>
+#include <clap/ext/tail.h>
 
 namespace clap {
 namespace host {
@@ -30,11 +31,12 @@ Host::Host(const clap_host_t& original)
       url(original.url ? std::optional(original.url) : std::nullopt),
       version((assert(original.version), original.version)) {}
 
-std::array<std::pair<bool, const char*>, 3> SupportedHostExtensions::list()
+std::array<std::pair<bool, const char*>, 4> SupportedHostExtensions::list()
     const noexcept {
     return {std::pair(supports_audio_ports, CLAP_EXT_AUDIO_PORTS),
             std::pair(supports_note_ports, CLAP_EXT_NOTE_PORTS),
-            std::pair(supports_params, CLAP_EXT_PARAMS)};
+            std::pair(supports_params, CLAP_EXT_PARAMS),
+            std::pair(supports_tail, CLAP_EXT_TAIL)};
 }
 
 }  // namespace host

src/common/serialization/clap/host.h

@@ -84,18 +84,20 @@ struct SupportedHostExtensions {
     bool supports_audio_ports = false;
     bool supports_note_ports = false;
     bool supports_params = false;
+    bool supports_tail = false;
 
     /**
      * Get a list of `<bool, extension_name>` tuples for the supported
      * extensions. Used during logging.
      */
-    std::array<std::pair<bool, const char*>, 3> list() const noexcept;
+    std::array<std::pair<bool, const char*>, 4> list() const noexcept;
 
     template <typename S>
     void serialize(S& s) {
         s.value1b(supports_audio_ports);
         s.value1b(supports_note_ports);
         s.value1b(supports_params);
+        s.value1b(supports_tail);
     }
 };
 

src/common/serialization/clap/plugin.cpp

@@ -19,6 +19,7 @@
 #include <clap/ext/audio-ports.h>
 #include <clap/ext/note-ports.h>
 #include <clap/ext/params.h>
+#include <clap/ext/tail.h>
 
 #include "version.h"
 
@@ -78,11 +79,12 @@ const clap_plugin_descriptor_t* Descriptor::get() const {
     return &clap_descriptor;
 }
 
-std::array<std::pair<bool, const char*>, 3> SupportedPluginExtensions::list()
+std::array<std::pair<bool, const char*>, 4> SupportedPluginExtensions::list()
     const noexcept {
     return {std::pair(supports_audio_ports, CLAP_EXT_AUDIO_PORTS),
             std::pair(supports_note_ports, CLAP_EXT_NOTE_PORTS),
-            std::pair(supports_params, CLAP_EXT_PARAMS)};
+            std::pair(supports_params, CLAP_EXT_PARAMS),
+            std::pair(supports_tail, CLAP_EXT_TAIL)};
 }
 
 }  // namespace plugin

src/common/serialization/clap/plugin.h

@@ -117,6 +117,7 @@ struct SupportedPluginExtensions {
     bool supports_audio_ports = false;
     bool supports_note_ports = false;
     bool supports_params = false;
+    bool supports_tail = false;
 
     /**
      * Get a list of `<bool, extension_name>` tuples for the supported
@@ -129,6 +130,7 @@ struct SupportedPluginExtensions {
         s.value1b(supports_audio_ports);
         s.value1b(supports_note_ports);
         s.value1b(supports_params);
+        s.value1b(supports_tail);
     }
 };