1 files changed, 114 insertions, 0 deletions
diff --git a/externals/oboe/src/flowgraph/FlowGraphNode.cpp b/externals/oboe/src/flowgraph/FlowGraphNode.cpp
new file mode 100644
index 0000000000..012abe7ef1
--- /dev/null
+++ b/externals/oboe/src/flowgraph/FlowGraphNode.cpp
@@ -0,0 +1,114 @@
+/*
+ * 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 "stdio.h"
+#include <algorithm>
+#include <sys/types.h>
+#include "FlowGraphNode.h"
+
+using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
+
+/***************************************************************************/
+int32_t FlowGraphNode::pullData(int32_t numFrames, int64_t callCount) {
+    int32_t frameCount = numFrames;
+    // Prevent recursion and multiple execution of nodes.
+    if (callCount > mLastCallCount) {
+        mLastCallCount = callCount;
+        if (mDataPulledAutomatically) {
+            // Pull from all the upstream nodes.
+            for (auto &port : mInputPorts) {
+                // TODO fix bug of leaving unused data in some ports if using multiple AudioSource
+                frameCount = port.get().pullData(callCount, frameCount);
+            }
+        }
+        if (frameCount > 0) {
+            frameCount = onProcess(frameCount);
+        }
+        mLastFrameCount = frameCount;
+    } else {
+        frameCount = mLastFrameCount;
+    }
+    return frameCount;
+}
+
+void FlowGraphNode::pullReset() {
+    if (!mBlockRecursion) {
+        mBlockRecursion = true; // for cyclic graphs
+        // Pull reset from all the upstream nodes.
+        for (auto &port : mInputPorts) {
+            port.get().pullReset();
+        }
+        mBlockRecursion = false;
+        reset();
+    }
+}
+
+void FlowGraphNode::reset() {
+    mLastFrameCount = 0;
+    mLastCallCount = kInitialCallCount;
+}
+
+/***************************************************************************/
+FlowGraphPortFloat::FlowGraphPortFloat(FlowGraphNode &parent,
+                               int32_t samplesPerFrame,
+                               int32_t framesPerBuffer)
+        : FlowGraphPort(parent, samplesPerFrame)
+        , mFramesPerBuffer(framesPerBuffer)
+        , mBuffer(nullptr) {
+    size_t numFloats = static_cast<size_t>(framesPerBuffer) * getSamplesPerFrame();
+    mBuffer = std::make_unique<float[]>(numFloats);
+}
+
+/***************************************************************************/
+int32_t FlowGraphPortFloatOutput::pullData(int64_t callCount, int32_t numFrames) {
+    numFrames = std::min(getFramesPerBuffer(), numFrames);
+    return mContainingNode.pullData(numFrames, callCount);
+}
+
+void FlowGraphPortFloatOutput::pullReset() {
+    mContainingNode.pullReset();
+}
+
+// These need to be in the .cpp file because of forward cross references.
+void FlowGraphPortFloatOutput::connect(FlowGraphPortFloatInput *port) {
+    port->connect(this);
+}
+
+void FlowGraphPortFloatOutput::disconnect(FlowGraphPortFloatInput *port) {
+    port->disconnect(this);
+}
+
+/***************************************************************************/
+int32_t FlowGraphPortFloatInput::pullData(int64_t callCount, int32_t numFrames) {
+    return (mConnected == nullptr)
+            ? std::min(getFramesPerBuffer(), numFrames)
+            : mConnected->pullData(callCount, numFrames);
+}
+void FlowGraphPortFloatInput::pullReset() {
+    if (mConnected != nullptr) mConnected->pullReset();
+}
+
+float *FlowGraphPortFloatInput::getBuffer() {
+    if (mConnected == nullptr) {
+        return FlowGraphPortFloat::getBuffer(); // loaded using setValue()
+    } else {
+        return mConnected->getBuffer();
+    }
+}
+
+int32_t FlowGraphSink::pullData(int32_t numFrames) {
+    return FlowGraphNode::pullData(numFrames, getLastCallCount() + 1);
+}