1 files changed, 54 insertions, 0 deletions
diff --git a/externals/oboe/src/flowgraph/SourceI16.cpp b/externals/oboe/src/flowgraph/SourceI16.cpp
new file mode 100644
index 0000000000..58c3b1e86c
--- /dev/null
+++ b/externals/oboe/src/flowgraph/SourceI16.cpp
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+#include <algorithm>
+#include <unistd.h>
+
+#include "FlowGraphNode.h"
+#include "SourceI16.h"
+
+#if FLOWGRAPH_ANDROID_INTERNAL
+#include <audio_utils/primitives.h>
+#endif
+
+using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
+
+SourceI16::SourceI16(int32_t channelCount)
+        : FlowGraphSourceBuffered(channelCount) {
+}
+
+int32_t SourceI16::onProcess(int32_t numFrames) {
+    float *floatData = output.getBuffer();
+    int32_t channelCount = output.getSamplesPerFrame();
+
+    int32_t framesLeft = mSizeInFrames - mFrameIndex;
+    int32_t framesToProcess = std::min(numFrames, framesLeft);
+    int32_t numSamples = framesToProcess * channelCount;
+
+    const int16_t *shortBase = static_cast<const int16_t *>(mData);
+    const int16_t *shortData = &shortBase[mFrameIndex * channelCount];
+
+#if FLOWGRAPH_ANDROID_INTERNAL
+    memcpy_to_float_from_i16(floatData, shortData, numSamples);
+#else
+    for (int i = 0; i < numSamples; i++) {
+        *floatData++ = *shortData++ * (1.0f / 32768);
+    }
+#endif
+
+    mFrameIndex += framesToProcess;
+    return framesToProcess;
+}