Add serialization structs for audio ports

src/common/serialization/clap.h

@@ -39,13 +39,16 @@
  */
 // FIXME: Remove the `WantsConfiguration`. For some reason bitsery just won't
 //        serialize this without it.
-using ClapMainThreadControlRequest = std::variant<WantsConfiguration,
-                                                  clap::plugin_factory::List,
-                                                  clap::plugin_factory::Create,
-                                                  clap::plugin::Init,
-                                                  clap::plugin::Destroy,
-                                                  clap::plugin::Activate,
-                                                  clap::plugin::Deactivate>;
+using ClapMainThreadControlRequest =
+    std::variant<WantsConfiguration,
+                 clap::plugin_factory::List,
+                 clap::plugin_factory::Create,
+                 clap::plugin::Init,
+                 clap::plugin::Destroy,
+                 clap::plugin::Activate,
+                 clap::plugin::Deactivate,
+                 clap::ext::audio_ports::plugin::Count,
+                 clap::ext::audio_ports::plugin::Get>;
 
 template <typename S>
 void serialize(S& s, ClapMainThreadControlRequest& payload) {
@@ -124,9 +127,12 @@ struct ClapAudioThreadControlRequest {
  * type `ClapMainThreadCallbackRequest(T)` should send back a `T::Response`.
  */
 // TODO: Placeholder
-using ClapMainThreadCallbackRequest = std::variant<WantsConfiguration,
-                                                   clap::host::RequestRestart,
-                                                   clap::host::RequestProcess>;
+using ClapMainThreadCallbackRequest =
+    std::variant<WantsConfiguration,
+                 clap::host::RequestRestart,
+                 clap::host::RequestProcess,
+                 clap::ext::audio_ports::host::IsRescanFlagSupported,
+                 clap::ext::audio_ports::host::Rescan>;
 
 template <typename S>
 void serialize(S& s, ClapMainThreadCallbackRequest& payload) {

src/common/serialization/clap/ext/audio-ports.cpp

@@ -0,0 +1,33 @@
+// yabridge: a Wine plugin bridge
+// Copyright (C) 2020-2022 Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "audio-ports.h"
+
+namespace clap {
+namespace ext {
+namespace audio_ports {
+
+AudioPortInfo::AudioPortInfo(const clap_audio_port_info_t& original)
+    : id(original.id),
+      name(original.name),
+      flags(original.flags),
+      channel_count(original.channel_count),
+      port_type(original.port_type),
+      in_place_pair(original.in_place_pair) {}
+
+}  // namespace audio_ports
+}  // namespace ext
+}  // namespace clap

src/common/serialization/clap/ext/audio-ports.h

@@ -0,0 +1,160 @@
+// yabridge: a Wine plugin bridge
+// Copyright (C) 2020-2022 Robbert van der Helm
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include <clap/ext/audio-ports.h>
+
+#include "../../../bitsery/ext/in-place-optional.h"
+#include "../../common.h"
+
+// Serialization messages for `clap/ext/audio-ports.h`
+
+namespace clap {
+namespace ext {
+namespace audio_ports {
+
+/**
+ * A serializable version of `clap_audio_port_info` that owns all of the data it
+ * references.
+ */
+struct AudioPortInfo {
+    /**
+     * Parse a host descriptor so it can be serialized and sent to the Wine
+     * plugin host.
+     */
+    AudioPortInfo(const clap_audio_port_info_t& original);
+
+    /**
+     * Default constructor for bitsery.
+     */
+    AudioPortInfo() {}
+
+    clap_id id;
+    std::string name;
+    uint32_t flags;
+    uint32_t channel_count;
+    // We could create an enum for this and only serialize the predefined types,
+    // but store the actual string is easier and more future proof without
+    // having a noticeable impact on performance.
+    std::string port_type;
+    clap_id in_place_pair;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.value4b(id);
+        s.text1b(name, 4096);
+        s.value4b(flags);
+        s.value4b(channel_count);
+        s.text1b(port_type);
+        s.value4b(in_place_pair);
+    }
+};
+
+namespace plugin {
+
+/**
+ * Message struct for `clap_plugin_audio_ports::count()`.
+ */
+struct Count {
+    using Response = PrimitiveResponse<uint32_t>;
+
+    native_size_t instance_id;
+    bool is_input;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.value8b(instance_id);
+        s.value1b(is_input);
+    }
+};
+
+/**
+ * The response to the `clap::ext::audio_ports::Get` message defined below.
+ */
+struct GetResponse {
+    std::optional<AudioPortInfo> result;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.ext(result, bitsery::ext::InPlaceOptional(),
+              [](S& s, auto& v) { s.object(v); });
+    }
+};
+
+/**
+ * Message struct for `clap_plugin_audio_ports::get()`.
+ */
+struct Get {
+    using Response = GetResponse;
+
+    native_size_t instance_id;
+    uint32_t index;
+    bool is_input;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.value8b(instance_id);
+        s.value4b(index);
+        s.value1b(is_input);
+    }
+};
+
+}  // namespace plugin
+
+namespace host {
+
+/**
+ * Message struct for `clap_host_audio_ports::is_rescan_flag_supported()`.
+ */
+struct IsRescanFlagSupported {
+    using Response = PrimitiveResponse<bool>;
+
+    native_size_t owner_instance_id;
+    uint32_t flag;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.value8b(owner_instance_id);
+        s.value4b(flag);
+    }
+};
+
+/**
+ * Message struct for `clap_host_audio_ports::rescan()`.
+ */
+struct Rescan {
+    using Response = Ack;
+
+    native_size_t owner_instance_id;
+    uint32_t flags;
+
+    template <typename S>
+    void serialize(S& s) {
+        s.value8b(owner_instance_id);
+        s.value4b(flags);
+    }
+};
+
+}  // namespace host
+
+}  // namespace audio_ports
+}  // namespace ext
+}  // namespace clap

src/wine-host/meson.build

@@ -80,6 +80,7 @@ host_sources = files(
 if with_clap
   host_sources += files(
     '../common/logging/clap.cpp',
+    '../common/serialization/clap/ext/audio-ports.cpp',
     '../common/serialization/clap/plugin.cpp',
     'bridges/clap-impls/host-proxy.cpp',
     'bridges/clap.cpp',