diff --git a/audio/2.0/default/Stream.cpp b/audio/2.0/default/Stream.cpp
new file mode 100644
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--- /dev/null
+++ b/audio/2.0/default/Stream.cpp
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2016 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 <inttypes.h>
+
+#define LOG_TAG "StreamHAL"
+
+#include <hardware/audio.h>
+#include <hardware/audio_effect.h>
+#include <media/TypeConverter.h>
+#include <utils/Log.h>
+#include <utils/SortedVector.h>
+#include <utils/Vector.h>
+
+#include "Conversions.h"
+#include "EffectMap.h"
+#include "Stream.h"
+
+namespace android {
+namespace hardware {
+namespace audio {
+namespace V2_0 {
+namespace implementation {
+
+Stream::Stream(audio_stream_t* stream)
+        : mStream(stream) {
+}
+
+Stream::~Stream() {
+    mStream = nullptr;
+}
+
+Result Stream::analyzeStatus(const char* funcName, int status) {
+    if (status != 0) {
+        ALOGW("Stream %p %s: %s", mStream, funcName, strerror(-status));
+    }
+    switch (status) {
+        case 0: return Result::OK;
+        case -EINVAL: return Result::INVALID_ARGUMENTS;
+        case -ENODATA: return Result::INVALID_STATE;
+        case -ENODEV: return Result::NOT_INITIALIZED;
+        case -ENOSYS: return Result::NOT_SUPPORTED;
+        default: return Result::INVALID_STATE;
+    }
+}
+
+char* Stream::halGetParameters(const char* keys) {
+    return mStream->get_parameters(mStream, keys);
+}
+
+int Stream::halSetParameters(const char* keysAndValues) {
+    return mStream->set_parameters(mStream, keysAndValues);
+}
+
+// Methods from ::android::hardware::audio::V2_0::IStream follow.
+Return<uint64_t> Stream::getFrameSize()  {
+    // Needs to be implemented by interface subclasses. But can't be declared as pure virtual,
+    // since interface subclasses implementation do not inherit from this class.
+    LOG_ALWAYS_FATAL("Stream::getFrameSize is pure abstract");
+    return uint64_t {};
+}
+
+Return<uint64_t> Stream::getFrameCount()  {
+    int halFrameCount;
+    Result retval = getParam(AudioParameter::keyFrameCount, &halFrameCount);
+    return retval == Result::OK ? halFrameCount : 0;
+}
+
+Return<uint64_t> Stream::getBufferSize()  {
+    return mStream->get_buffer_size(mStream);
+}
+
+Return<uint32_t> Stream::getSampleRate()  {
+    return mStream->get_sample_rate(mStream);
+}
+
+Return<void> Stream::getSupportedSampleRates(getSupportedSampleRates_cb _hidl_cb)  {
+    String8 halListValue;
+    Result result = getParam(AudioParameter::keyStreamSupportedSamplingRates, &halListValue);
+    hidl_vec<uint32_t> sampleRates;
+    SortedVector<uint32_t> halSampleRates;
+    if (result == Result::OK) {
+        halSampleRates = samplingRatesFromString(
+                halListValue.string(), AudioParameter::valueListSeparator);
+        sampleRates.setToExternal(halSampleRates.editArray(), halSampleRates.size());
+    }
+    _hidl_cb(sampleRates);
+    return Void();
+}
+
+Return<Result> Stream::setSampleRate(uint32_t sampleRateHz)  {
+    return setParam(AudioParameter::keySamplingRate, static_cast<int>(sampleRateHz));
+}
+
+Return<AudioChannelMask> Stream::getChannelMask()  {
+    return AudioChannelMask(mStream->get_channels(mStream));
+}
+
+Return<void> Stream::getSupportedChannelMasks(getSupportedChannelMasks_cb _hidl_cb)  {
+    String8 halListValue;
+    Result result = getParam(AudioParameter::keyStreamSupportedChannels, &halListValue);
+    hidl_vec<AudioChannelMask> channelMasks;
+    SortedVector<audio_channel_mask_t> halChannelMasks;
+    if (result == Result::OK) {
+        halChannelMasks = channelMasksFromString(
+                halListValue.string(), AudioParameter::valueListSeparator);
+        channelMasks.resize(halChannelMasks.size());
+        for (size_t i = 0; i < halChannelMasks.size(); ++i) {
+            channelMasks[i] = AudioChannelMask(halChannelMasks[i]);
+        }
+    }
+     _hidl_cb(channelMasks);
+    return Void();
+}
+
+Return<Result> Stream::setChannelMask(AudioChannelMask mask)  {
+    return setParam(AudioParameter::keyChannels, static_cast<int>(mask));
+}
+
+Return<AudioFormat> Stream::getFormat()  {
+    return AudioFormat(mStream->get_format(mStream));
+}
+
+Return<void> Stream::getSupportedFormats(getSupportedFormats_cb _hidl_cb)  {
+    String8 halListValue;
+    Result result = getParam(AudioParameter::keyStreamSupportedFormats, &halListValue);
+    hidl_vec<AudioFormat> formats;
+    Vector<audio_format_t> halFormats;
+    if (result == Result::OK) {
+        halFormats = formatsFromString(halListValue.string(), AudioParameter::valueListSeparator);
+        formats.resize(halFormats.size());
+        for (size_t i = 0; i < halFormats.size(); ++i) {
+            formats[i] = AudioFormat(halFormats[i]);
+        }
+    }
+     _hidl_cb(formats);
+    return Void();
+}
+
+Return<Result> Stream::setFormat(AudioFormat format)  {
+    return setParam(AudioParameter::keyFormat, static_cast<int>(format));
+}
+
+Return<void> Stream::getAudioProperties(getAudioProperties_cb _hidl_cb)  {
+    uint32_t halSampleRate = mStream->get_sample_rate(mStream);
+    audio_channel_mask_t halMask = mStream->get_channels(mStream);
+    audio_format_t halFormat = mStream->get_format(mStream);
+    _hidl_cb(halSampleRate, AudioChannelMask(halMask), AudioFormat(halFormat));
+    return Void();
+}
+
+Return<Result> Stream::addEffect(uint64_t effectId)  {
+    effect_handle_t halEffect = EffectMap::getInstance().get(effectId);
+    if (halEffect != NULL) {
+        return analyzeStatus("add_audio_effect", mStream->add_audio_effect(mStream, halEffect));
+    } else {
+        ALOGW("Invalid effect ID passed from client: %" PRIu64, effectId);
+        return Result::INVALID_ARGUMENTS;
+    }
+}
+
+Return<Result> Stream::removeEffect(uint64_t effectId)  {
+    effect_handle_t halEffect = EffectMap::getInstance().get(effectId);
+    if (halEffect != NULL) {
+        return analyzeStatus(
+                "remove_audio_effect", mStream->remove_audio_effect(mStream, halEffect));
+    } else {
+        ALOGW("Invalid effect ID passed from client: %" PRIu64, effectId);
+        return Result::INVALID_ARGUMENTS;
+    }
+}
+
+Return<Result> Stream::standby()  {
+    return analyzeStatus("standby", mStream->standby(mStream));
+}
+
+Return<AudioDevice> Stream::getDevice()  {
+    return AudioDevice(mStream->get_device(mStream));
+}
+
+Return<Result> Stream::setDevice(const DeviceAddress& address)  {
+    char* halDeviceAddress =
+            audio_device_address_to_parameter(
+                    static_cast<audio_devices_t>(address.device),
+                    deviceAddressToHal(address).c_str());
+    AudioParameter params((String8(halDeviceAddress)));
+    free(halDeviceAddress);
+    params.addInt(
+            String8(AudioParameter::keyRouting), static_cast<audio_devices_t>(address.device));
+    return setParams(params);
+}
+
+Return<Result> Stream::setConnectedState(const DeviceAddress& address, bool connected)  {
+    return setParam(
+            connected ? AudioParameter::keyStreamConnect : AudioParameter::keyStreamDisconnect,
+            deviceAddressToHal(address).c_str());
+}
+
+Return<Result> Stream::setHwAvSync(uint32_t hwAvSync)  {
+    return setParam(AudioParameter::keyStreamHwAvSync, static_cast<int>(hwAvSync));
+}
+
+Return<void> Stream::getParameters(const hidl_vec<hidl_string>& keys, getParameters_cb _hidl_cb)  {
+    getParametersImpl(keys, _hidl_cb);
+    return Void();
+}
+
+Return<Result> Stream::setParameters(const hidl_vec<ParameterValue>& parameters)  {
+    return setParametersImpl(parameters);
+}
+
+Return<void> Stream::debugDump(const native_handle_t* fd)  {
+    if (fd->numFds == 1) {
+        analyzeStatus("dump", mStream->dump(mStream, fd->data[0]));
+    }
+    return Void();
+}
+
+} // namespace implementation
+}  // namespace V2_0
+}  // namespace audio
+}  // namespace hardware
+}  // namespace android