1 files changed, 74 insertions, 0 deletions
diff --git a/externals/oboe/src/opensles/OutputMixerOpenSLES.cpp b/externals/oboe/src/opensles/OutputMixerOpenSLES.cpp
new file mode 100644
index 0000000000..e06f306bae
--- /dev/null
+++ b/externals/oboe/src/opensles/OutputMixerOpenSLES.cpp
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2017 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 "common/OboeDebug.h"
+#include "EngineOpenSLES.h"
+#include "OpenSLESUtilities.h"
+#include "OutputMixerOpenSLES.h"
+
+using namespace oboe;
+
+OutputMixerOpenSL &OutputMixerOpenSL::getInstance() {
+    static OutputMixerOpenSL sInstance;
+    return sInstance;
+}
+
+SLresult OutputMixerOpenSL::open() {
+    std::lock_guard<std::mutex> lock(mLock);
+
+    SLresult result = SL_RESULT_SUCCESS;
+    if (mOpenCount++ == 0) {
+        // get the output mixer
+        result = EngineOpenSLES::getInstance().createOutputMix(&mOutputMixObject);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("OutputMixerOpenSL() - createOutputMix() result:%s", getSLErrStr(result));
+            goto error;
+        }
+
+        // realize the output mix
+        result = (*mOutputMixObject)->Realize(mOutputMixObject, SL_BOOLEAN_FALSE);
+        if (SL_RESULT_SUCCESS != result) {
+            LOGE("OutputMixerOpenSL() - Realize() mOutputMixObject result:%s", getSLErrStr(result));
+            goto error;
+        }
+    }
+
+    return result;
+
+error:
+    close();
+    return result;
+}
+
+void OutputMixerOpenSL::close() {
+    std::lock_guard<std::mutex> lock(mLock);
+
+    if (--mOpenCount == 0) {
+        // destroy output mix object, and invalidate all associated interfaces
+        if (mOutputMixObject != nullptr) {
+            (*mOutputMixObject)->Destroy(mOutputMixObject);
+            mOutputMixObject = nullptr;
+        }
+    }
+}
+
+SLresult OutputMixerOpenSL::createAudioPlayer(SLObjectItf *objectItf,
+                                              SLDataSource *audioSource) {
+    SLDataLocator_OutputMix loc_outmix = {SL_DATALOCATOR_OUTPUTMIX, mOutputMixObject};
+    SLDataSink audioSink = {&loc_outmix, NULL};
+    return EngineOpenSLES::getInstance().createAudioPlayer(objectItf, audioSource, &audioSink);
+}