Add serialization for CLAP audio buffers

src/common/serialization/clap/audio-buffer.h

@@ -0,0 +1,50 @@
+// 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 destates.
+//
+// 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 <clap/audio-buffer.h>
+
+// Serialization messages for `clap/audio-buffer.h`
+
+namespace clap {
+namespace audio_buffer {
+
+/**
+ * Metadata used to encode whether an audio port/buffer carries 32-=bit or
+ * 64-bit audio data. This needs to be stored separately because CLAP uses
+ * whether or not one of the two pointers is null to indicate the type of data
+ * stored in the audio buffer.
+ */
+enum class AudioBufferType : uint8_t {
+    Float32,
+    Double64,
+};
+
+}  // namespace audio_buffer
+}  // namespace clap
+
+template <typename S>
+void serialize(S& s, clap_audio_buffer_t& buffer) {
+    // These need to be set later using the shared memory object and depending
+    // on the `AudioBufferType`. We'll zero them out so default initialized
+    // objects created by bitsery won't contain uninitialized memory.
+    buffer.data32 = nullptr;
+    buffer.data64 = nullptr;
+    s.value4b(buffer.channel_count);
+    s.value4b(buffer.latency);
+    s.value8b(buffer.constant_mask);
+}