1 files changed, 41 insertions, 0 deletions
diff --git a/externals/oboe/src/flowgraph/MonoToMultiConverter.cpp b/externals/oboe/src/flowgraph/MonoToMultiConverter.cpp
new file mode 100644
index 0000000000..33eed5232a
--- /dev/null
+++ b/externals/oboe/src/flowgraph/MonoToMultiConverter.cpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2015 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.
+ */
+
+#include <unistd.h>
+#include "FlowGraphNode.h"
+#include "MonoToMultiConverter.h"
+
+using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
+
+MonoToMultiConverter::MonoToMultiConverter(int32_t outputChannelCount)
+        : input(*this, 1)
+        , output(*this, outputChannelCount) {
+}
+
+int32_t MonoToMultiConverter::onProcess(int32_t numFrames) {
+    const float *inputBuffer = input.getBuffer();
+    float *outputBuffer = output.getBuffer();
+    int32_t channelCount = output.getSamplesPerFrame();
+    for (int i = 0; i < numFrames; i++) {
+        // read one, write many
+        float sample = *inputBuffer++;
+        for (int channel = 0; channel < channelCount; channel++) {
+            *outputBuffer++ = sample;
+        }
+    }
+    return numFrames;
+}
+