1 files changed, 47 insertions, 0 deletions
diff --git a/src/common/SourceI32Caller.cpp b/src/common/SourceI32Caller.cpp
new file mode 100644
index 00000000..188bd47c
--- /dev/null
+++ b/src/common/SourceI32Caller.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2019 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 "flowgraph/FlowGraphNode.h"
+#include "SourceI32Caller.h"
+
+#if FLOWGRAPH_ANDROID_INTERNAL
+#include <audio_utils/primitives.h>
+#endif
+
+using namespace oboe;
+using namespace flowgraph;
+
+int32_t SourceI32Caller::onProcess(int32_t numFrames) {
+    int32_t numBytes = mStream->getBytesPerFrame() * numFrames;
+    int32_t bytesRead = mBlockReader.read((uint8_t *) mConversionBuffer.get(), numBytes);
+    int32_t framesRead = bytesRead / mStream->getBytesPerFrame();
+
+    float *floatData = output.getBuffer();
+    const int32_t *intData = mConversionBuffer.get();
+    int32_t numSamples = framesRead * output.getSamplesPerFrame();
+
+#if FLOWGRAPH_ANDROID_INTERNAL
+    memcpy_to_float_from_i32(floatData, shortData, numSamples);
+#else
+    for (int i = 0; i < numSamples; i++) {
+        *floatData++ = *intData++ * kScale;
+    }
+#endif
+
+    return framesRead;
+}