1 files changed, 38 insertions, 0 deletions
diff --git a/externals/oboe/src/common/AudioSourceCaller.cpp b/externals/oboe/src/common/AudioSourceCaller.cpp
new file mode 100644
index 0000000000..a19cf8134f
--- /dev/null
+++ b/externals/oboe/src/common/AudioSourceCaller.cpp
@@ -0,0 +1,38 @@
+/*
+ * 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 "AudioSourceCaller.h"
+
+using namespace oboe;
+using namespace flowgraph;
+
+int32_t AudioSourceCaller::onProcessFixedBlock(uint8_t *buffer, int32_t numBytes) {
+    AudioStreamDataCallback *callback = mStream->getDataCallback();
+    int32_t result = 0;
+    int32_t numFrames = numBytes / mStream->getBytesPerFrame();
+    if (callback != nullptr) {
+        DataCallbackResult callbackResult = callback->onAudioReady(mStream, buffer, numFrames);
+        // onAudioReady() does not return the number of bytes processed so we have to assume all.
+        result = (callbackResult == DataCallbackResult::Continue)
+                ? numBytes
+                : -1;
+    } else {
+        auto readResult = mStream->read(buffer, numFrames, mTimeoutNanos);
+        if (!readResult) return (int32_t) readResult.error();
+        result = readResult.value() * mStream->getBytesPerFrame();
+    }
+    return result;
+}