Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/oboe/apps/fxlab/app/src/main/cpp/DuplexEngine.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright  2019 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef EFFECTS_APP_DUPLEXSTREAM_H
+#define EFFECTS_APP_DUPLEXSTREAM_H
+
+#include <array>
+#include <algorithm>
+#include <variant>
+
+#include <oboe/Oboe.h>
+#include "FunctionList.h"
+#include "DuplexCallback.h"
+
+
+class DuplexEngine {
+public:
+    DuplexEngine();
+
+    void beginStreams();
+
+    virtual ~DuplexEngine() = default;
+
+    oboe::Result startStreams();
+
+    oboe::Result stopStreams();
+
+
+    std::variant<FunctionList<int16_t *>, FunctionList<float *>> functionList{
+            std::in_place_type<FunctionList<int16_t *>>};
+
+private:
+
+    void openInStream();
+
+    void openOutStream();
+
+    static oboe::AudioStreamBuilder defaultBuilder();
+
+    template<class numeric>
+    void createCallback();
+
+    oboe::ManagedStream inStream;
+    std::unique_ptr<oboe::AudioStreamCallback> mCallback;
+    oboe::ManagedStream outStream;
+
+
+};
+
+
+#endif //EFFECTS_APP_DUPLEXSTREAM_H