aaudio: add simple flowgraph system
Implement a simple data flow model that can be used to
chain various processing modules including:
data format conversion
volume ramping
channel conversion
Bug: 65067568
Test: test_flowgraph.cpp
Change-Id: I81a5655406cfa8c1c7d7cef4d933879f823939a5
diff --git a/media/libaaudio/src/flowgraph/SinkFloat.h b/media/libaaudio/src/flowgraph/SinkFloat.h
new file mode 100644
index 0000000..7775c08
--- /dev/null
+++ b/media/libaaudio/src/flowgraph/SinkFloat.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * 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
+ *
+ * http://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 FLOWGRAPH_SINK_FLOAT_H
+#define FLOWGRAPH_SINK_FLOAT_H
+
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "AudioProcessorBase.h"
+
+namespace flowgraph {
+
+class SinkFloat : public AudioSink {
+public:
+ explicit SinkFloat(int32_t channelCount);
+
+ int32_t read(void *data, int32_t numFrames) override;
+
+};
+
+} /* namespace flowgraph */
+
+#endif //FLOWGRAPH_SINK_FLOAT_H