diff --git a/audio/2.0/Android.bp b/audio/2.0/Android.bp
new file mode 100644
index 0000000..5edb042
--- /dev/null
+++ b/audio/2.0/Android.bp
@@ -0,0 +1,96 @@
+// This file is autogenerated by hidl-gen. Do not edit manually.
+
+genrule {
+    name: "android.hardware.audio@2.0_genc++",
+    tool: "hidl-gen",
+    cmd: "$tool -o $genDir -Lc++ -randroid.hardware:hardware/interfaces android.hardware.audio@2.0",
+    srcs: [
+        "types.hal",
+        "IDevice.hal",
+        "IDevicesFactory.hal",
+        "IPrimaryDevice.hal",
+        "IStream.hal",
+        "IStreamIn.hal",
+        "IStreamOut.hal",
+        "IStreamOutCallback.hal",
+    ],
+    out: [
+        "android/hardware/audio/2.0/types.cpp",
+        "android/hardware/audio/2.0/DeviceAll.cpp",
+        "android/hardware/audio/2.0/DevicesFactoryAll.cpp",
+        "android/hardware/audio/2.0/PrimaryDeviceAll.cpp",
+        "android/hardware/audio/2.0/StreamAll.cpp",
+        "android/hardware/audio/2.0/StreamInAll.cpp",
+        "android/hardware/audio/2.0/StreamOutAll.cpp",
+        "android/hardware/audio/2.0/StreamOutCallbackAll.cpp",
+    ],
+}
+
+genrule {
+    name: "android.hardware.audio@2.0_genc++_headers",
+    tool: "hidl-gen",
+    cmd: "$tool -o $genDir -Lc++ -randroid.hardware:hardware/interfaces android.hardware.audio@2.0",
+    srcs: [
+        "types.hal",
+        "IDevice.hal",
+        "IDevicesFactory.hal",
+        "IPrimaryDevice.hal",
+        "IStream.hal",
+        "IStreamIn.hal",
+        "IStreamOut.hal",
+        "IStreamOutCallback.hal",
+    ],
+    out: [
+        "android/hardware/audio/2.0/types.h",
+        "android/hardware/audio/2.0/IDevice.h",
+        "android/hardware/audio/2.0/IHwDevice.h",
+        "android/hardware/audio/2.0/BnDevice.h",
+        "android/hardware/audio/2.0/BpDevice.h",
+        "android/hardware/audio/2.0/BsDevice.h",
+        "android/hardware/audio/2.0/IDevicesFactory.h",
+        "android/hardware/audio/2.0/IHwDevicesFactory.h",
+        "android/hardware/audio/2.0/BnDevicesFactory.h",
+        "android/hardware/audio/2.0/BpDevicesFactory.h",
+        "android/hardware/audio/2.0/BsDevicesFactory.h",
+        "android/hardware/audio/2.0/IPrimaryDevice.h",
+        "android/hardware/audio/2.0/IHwPrimaryDevice.h",
+        "android/hardware/audio/2.0/BnPrimaryDevice.h",
+        "android/hardware/audio/2.0/BpPrimaryDevice.h",
+        "android/hardware/audio/2.0/BsPrimaryDevice.h",
+        "android/hardware/audio/2.0/IStream.h",
+        "android/hardware/audio/2.0/IHwStream.h",
+        "android/hardware/audio/2.0/BnStream.h",
+        "android/hardware/audio/2.0/BpStream.h",
+        "android/hardware/audio/2.0/BsStream.h",
+        "android/hardware/audio/2.0/IStreamIn.h",
+        "android/hardware/audio/2.0/IHwStreamIn.h",
+        "android/hardware/audio/2.0/BnStreamIn.h",
+        "android/hardware/audio/2.0/BpStreamIn.h",
+        "android/hardware/audio/2.0/BsStreamIn.h",
+        "android/hardware/audio/2.0/IStreamOut.h",
+        "android/hardware/audio/2.0/IHwStreamOut.h",
+        "android/hardware/audio/2.0/BnStreamOut.h",
+        "android/hardware/audio/2.0/BpStreamOut.h",
+        "android/hardware/audio/2.0/BsStreamOut.h",
+        "android/hardware/audio/2.0/IStreamOutCallback.h",
+        "android/hardware/audio/2.0/IHwStreamOutCallback.h",
+        "android/hardware/audio/2.0/BnStreamOutCallback.h",
+        "android/hardware/audio/2.0/BpStreamOutCallback.h",
+        "android/hardware/audio/2.0/BsStreamOutCallback.h",
+    ],
+}
+
+cc_library_shared {
+    name: "android.hardware.audio@2.0",
+    generated_sources: ["android.hardware.audio@2.0_genc++"],
+    generated_headers: ["android.hardware.audio@2.0_genc++_headers"],
+    export_generated_headers: ["android.hardware.audio@2.0_genc++_headers"],
+    shared_libs: [
+        "libhidl",
+        "libhwbinder",
+        "libutils",
+        "libcutils",
+        "android.hardware.audio.common@2.0",
+        "android.hardware.audio.effect@2.0",
+    ],
+}
diff --git a/audio/2.0/IDevice.hal b/audio/2.0/IDevice.hal
new file mode 100644
index 0000000..84e0d28
--- /dev/null
+++ b/audio/2.0/IDevice.hal
@@ -0,0 +1,226 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+import IStreamIn;
+import IStreamOut;
+
+interface IDevice {
+    typedef android.hardware.audio@2.0::Result Result;
+
+    /*
+     * Returns whether the audio hardware interface has been initialized.
+     *
+     * @return retval OK on success, NOT_INITIALIZED on failure.
+     */
+    initCheck() generates (Result retval);
+
+    /*
+     * Sets the audio volume for all audio activities other than voice call. If
+     * NOT_SUPPORTED is returned, the software mixer will emulate this
+     * capability.
+     *
+     * @param volume 1.0f means unity, 0.0f is zero.
+     * @return retval operation completion status.
+     */
+    setMasterVolume(float volume) generates (Result retval);
+
+    /*
+     * Get the current master volume value for the HAL, if the HAL supports
+     * master volume control. For example, AudioFlinger will query this value
+     * from the primary audio HAL when the service starts and use the value for
+     * setting the initial master volume across all HALs. HALs which do not
+     * support this method must return NOT_SUPPORTED in 'retval'.
+     *
+     * @return retval operation completion status.
+     * @return volume 1.0f means unity, 0.0f is zero.
+     */
+    getMasterVolume() generates (Result retval, float volume);
+
+    /*
+     * Sets microphone muting state.
+     *
+     * @param mute whether microphone is muted.
+     * @return retval operation completion status.
+     */
+    setMicMute(bool mute) generates (Result retval);
+
+    /*
+     * Gets whether microphone is muted.
+     *
+     * @return retval operation completion status.
+     * @return mute whether microphone is muted.
+     */
+    getMicMute() generates (Result retval, bool mute);
+
+    /*
+     * Set the audio mute status for all audio activities. If the return value
+     * is NOT_SUPPORTED, the software mixer will emulate this capability.
+     *
+     * @param mute whether audio is muted.
+     * @return retval operation completion status.
+     */
+    setMasterMute(bool mute) generates (Result retval);
+
+    /**
+     * Get the current master mute status for the HAL, if the HAL supports
+     * master mute control. AudioFlinger will query this value from the primary
+     * audio HAL when the service starts and use the value for setting the
+     * initial master mute across all HALs. HAL must indicate that the feature
+     * is not supported by returning NOT_SUPPORTED status.
+     *
+     * @return retval operation completion status.
+     * @return mute whether audio is muted.
+     */
+    getMasterMute() generates (Result retval, bool mute);
+
+    /*
+     * Returns audio input buffer size according to parameters passed or
+     * INVALID_ARGUMENTS if one of the parameters is not supported.
+     *
+     * @param config audio configuration.
+     * @return retval operation completion status.
+     * @return bufferSize input buffer size in bytes.
+     */
+    getInputBufferSize(AudioConfig config)
+            generates (Result retval, uint64_t bufferSize);
+
+    /*
+     * This method creates and opens the audio hardware output stream.
+     *
+     * @param ioHandle handle assigned by AudioFlinger.
+     * @param device device type and (if needed) address.
+     * @param config stream configuration.
+     * @param flags additional flags.
+     * @return retval operation completion status.
+     * @return outStream created output stream.
+     */
+    openOutputStream(
+            AudioIoHandle ioHandle,
+            DeviceAddress device,
+            AudioConfig config,
+            AudioOutputFlag flags) generates (Result retval, IStreamOut outStream);
+
+    /*
+     * This method creates and opens the audio hardware input stream.
+     *
+     * @param ioHandle handle assigned by AudioFlinger.
+     * @param device device type and (if needed) address.
+     * @param config stream configuration.
+     * @param flags additional flags.
+     * @param source source specification.
+     * @return retval operation completion status.
+     * @return inStream created input stream.
+     */
+    openInputStream(
+            AudioIoHandle ioHandle,
+            DeviceAddress device,
+            AudioConfig config,
+            AudioInputFlag flags,
+            AudioSource source) generates (Result retval, IStreamIn inStream);
+
+    /*
+     * Creates an audio patch between several source and sink ports.  The handle
+     * is allocated by the HAL and must be unique for this audio HAL module.
+     *
+     * @param sources patch sources.
+     * @param sinks patch sinks.
+     * @return retval operation completion status.
+     * @return patch created patch handle.
+     */
+    createAudioPatch(vec<AudioPortConfig> sources, vec<AudioPortConfig> sinks)
+            generates (Result retval, AudioPatchHandle patch);
+
+    /*
+     * Release an audio patch.
+     *
+     * @param patch patch handle.
+     * @return retval operation completion status.
+     */
+    releaseAudioPatch(AudioPatchHandle patch) generates (Result retval);
+
+    /*
+     * Returns the list of supported attributes for a given audio port.
+     *
+     * As input, 'port' contains the information (type, role, address etc...)
+     * needed by the HAL to identify the port.
+     *
+     * As output, 'port' contains possible attributes (sampling rates, formats,
+     * channel masks, gain controllers...) for this port.
+     *
+     * @param port port identifier.
+     * @return retval operation completion status.
+     * @return port port descriptor with all parameters filled up.
+     */
+    getAudioPort(AudioPort port)
+            generates (Result retval, AudioPort port);
+
+    /*
+     * Set audio port configuration.
+     *
+     * @param config audio port configuration.
+     * @return retval operation completion status.
+     */
+    setAudioPortConfig(AudioPortConfig config) generates (Result retval);
+
+    /*
+     * Gets the HW synchronization source of the device. Calling this method is
+     * equivalent to getting AUDIO_PARAMETER_STREAM_HW_AV_SYNC on the legacy
+     * HAL.
+     *
+     * @return retval operation completion status.
+     * @return hwAvSync HW synchronization source
+     */
+    getHwAvSync() generates (Result retval, AudioHwSync hwAvSync);
+
+    /*
+     * Sets whether the screen is on. Calling this method is equivalent to
+     * setting AUDIO_PARAMETER_KEY_SCREEN_STATE on the legacy HAL.
+     */
+    setScreenState(bool turnedOn);
+
+    /*
+     * Generic method for retrieving vendor-specific parameter values.
+     * The framework does not interpret the parameters, they are passed
+     * in an opaque manner between a vendor application and HAL.
+     *
+     * @param keys parameter keys.
+     * @return retval operation completion status.
+     * @return parameters parameter key value pairs.
+     */
+    getParameters(vec<string> keys)
+            generates (Result retval, vec<ParameterValue> parameters);
+
+    /*
+     * Generic method for setting vendor-specific parameter values.
+     * The framework does not interpret the parameters, they are passed
+     * in an opaque manner between a vendor application and HAL.
+     *
+     * @param parameters parameter key value pairs.
+     * @return retval operation completion status.
+     */
+    setParameters(vec<ParameterValue> parameters) generates (Result retval);
+
+    /*
+     * Dumps information about the stream into the provided file descriptor.
+     * This is used for the dumpsys facility.
+     *
+     * @param fd dump file descriptor.
+     */
+    debugDump(handle fd);
+};
diff --git a/audio/2.0/IDevicesFactory.hal b/audio/2.0/IDevicesFactory.hal
new file mode 100644
index 0000000..a4e6956
--- /dev/null
+++ b/audio/2.0/IDevicesFactory.hal
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+import IDevice;
+
+interface IDevicesFactory {
+    typedef android.hardware.audio@2.0::Result Result;
+
+    enum Device {
+        PRIMARY,
+        A2DP,
+        USB,
+        R_SUBMIX
+    };
+
+    /*
+     * Opens an audio device. To close the device, it is necessary to release
+     * references to the returned device object.
+     *
+     * @param device device type.
+     * @return retval operation completion status. Returns INVALID_ARGUMENTS
+     *         if there is no corresponding hardware module found,
+     *         NOT_INITIALIZED if an error occured while opening the hardware
+     *         module.
+     * @return result the interface for the created device.
+     */
+    openDevice(Device device) generates (Result retval, IDevice result);
+};
diff --git a/audio/2.0/IPrimaryDevice.hal b/audio/2.0/IPrimaryDevice.hal
new file mode 100644
index 0000000..6beddfe
--- /dev/null
+++ b/audio/2.0/IPrimaryDevice.hal
@@ -0,0 +1,123 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+import IDevice;
+
+interface IPrimaryDevice extends IDevice {
+    typedef android.hardware.audio@2.0::Result Result;
+
+    /*
+     * Sets the audio volume of a voice call.
+     *
+     * @param volume 1.0f means unity, 0.0f is zero.
+     * @return retval operation completion status.
+     */
+    setVoiceVolume(float volume) generates (Result retval);
+
+    /*
+     * This method is used to notify the HAL about audio mode changes.
+     *
+     * @param mode new mode.
+     * @return retval operation completion status.
+     */
+    setMode(AudioMode mode) generates (Result retval);
+
+    /*
+     * Gets whether BT SCO Noise Reduction and Echo Cancellation are enabled.
+     * Calling this method is equivalent to getting AUDIO_PARAMETER_KEY_BT_NREC
+     * on the legacy HAL.
+     *
+     * @return retval operation completion status.
+     * @return enabled whether BT SCO NR + EC are enabled.
+     */
+    getBtScoNrecEnabled() generates (Result retval, bool enabled);
+
+    /*
+     * Sets whether BT SCO Noise Reduction and Echo Cancellation are enabled.
+     * Calling this method is equivalent to setting AUDIO_PARAMETER_KEY_BT_NREC
+     * on the legacy HAL.
+     *
+     * @param enabled whether BT SCO NR + EC are enabled.
+     * @return retval operation completion status.
+     */
+    setBtScoNrecEnabled(bool enabled) generates (Result retval);
+
+    /*
+     * Gets whether BT SCO Wideband mode is enabled. Calling this method is
+     * equivalent to getting AUDIO_PARAMETER_KEY_BT_SCO_WB on the legacy HAL.
+     *
+     * @return retval operation completion status.
+     * @return enabled whether BT Wideband is enabled.
+     */
+    getBtScoWidebandEnabled() generates (Result retval, bool enabled);
+
+    /*
+     * Sets whether BT SCO Wideband mode is enabled. Calling this method is
+     * equivalent to setting AUDIO_PARAMETER_KEY_BT_SCO_WB on the legacy HAL.
+     *
+     * @param enabled whether BT Wideband is enabled.
+     * @return retval operation completion status.
+     */
+    setBtScoWidebandEnabled(bool enabled) generates (Result retval);
+
+    enum TtyMode {
+        OFF,
+        VCO,
+        HCO,
+        FULL
+    };
+
+    /*
+     * Gets current TTY mode selection. Calling this method is equivalent to
+     * getting AUDIO_PARAMETER_KEY_TTY_MODE on the legacy HAL.
+     *
+     * @return retval operation completion status.
+     * @return mode TTY mode.
+     */
+    getTtyMode() generates (Result retval, TtyMode mode);
+
+    /*
+     * Sets current TTY mode. Calling this method is equivalent to setting
+     * AUDIO_PARAMETER_KEY_TTY_MODE on the legacy HAL.
+     *
+     * @param mode TTY mode.
+     * @return retval operation completion status.
+     */
+    setTtyMode(TtyMode mode) generates (Result retval);
+
+    /*
+     * Gets whether Hearing Aid Compatibility - Telecoil (HAC-T) mode is
+     * enabled. Calling this method is equivalent to getting
+     * AUDIO_PARAMETER_KEY_HAC on the legacy HAL.
+     *
+     * @return retval operation completion status.
+     * @return enabled whether HAC mode is enabled.
+     */
+    getHacEnabled() generates (Result retval, bool enabled);
+
+    /*
+     * Sets whether Hearing Aid Compatibility - Telecoil (HAC-T) mode is
+     * enabled. Calling this method is equivalent to setting
+     * AUDIO_PARAMETER_KEY_HAC on the legacy HAL.
+     *
+     * @param enabled whether HAC mode is enabled.
+     * @return retval operation completion status.
+     */
+    setHacEnabled(bool enabled) generates (Result retval);
+};
diff --git a/audio/2.0/IStream.hal b/audio/2.0/IStream.hal
new file mode 100644
index 0000000..09ba42a
--- /dev/null
+++ b/audio/2.0/IStream.hal
@@ -0,0 +1,229 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+import android.hardware.audio.effect@2.0::IEffect;
+
+interface IStream {
+    typedef android.hardware.audio@2.0::Result Result;
+
+    /*
+     * Return the frame size (number of bytes per sample).
+     *
+     * @return frameSize frame size in bytes.
+     */
+    getFrameSize() generates (uint64_t frameSize);
+
+    /*
+     * Return the frame count of the buffer. Calling this method is equivalent
+     * to getting AUDIO_PARAMETER_STREAM_FRAME_COUNT on the legacy HAL.
+     *
+     * @return count frame count.
+     */
+    getFrameCount() generates (uint64_t count);
+
+    /*
+     * Return the size of input/output buffer in bytes for this stream.
+     * It must be a multiple of the frame size.
+     *
+     * @return buffer buffer size in bytes.
+     */
+    getBufferSize() generates (uint64_t bufferSize);
+
+    /*
+     * Return the sampling rate in Hz.
+     *
+     * @return sampleRateHz sample rate in Hz.
+     */
+    getSampleRate() generates (uint32_t sampleRateHz);
+
+    /*
+     * Return supported sampling rates of the stream. Calling this method is
+     * equivalent to getting AUDIO_PARAMETER_STREAM_SUP_SAMPLING_RATES on the
+     * legacy HAL.
+     *
+     * @return sampleRateHz supported sample rates.
+     */
+    getSupportedSampleRates() generates (vec<uint32_t> sampleRates);
+
+    /*
+     * Sets the sampling rate of the stream. Calling this method is equivalent
+     * to setting AUDIO_PARAMETER_STREAM_SAMPLING_RATE on the legacy HAL.
+     *
+     * @param sampleRateHz sample rate in Hz.
+     * @return retval operation completion status.
+     */
+    setSampleRate(uint32_t sampleRateHz) generates (Result retval);
+
+    /*
+     * Return the channel mask of the stream.
+     *
+     * @return mask channel mask.
+     */
+    getChannelMask() generates (AudioChannelMask mask);
+
+    /*
+     * Return supported channel masks of the stream. Calling this method is
+     * equivalent to getting AUDIO_PARAMETER_STREAM_SUP_CHANNELS on the legacy
+     * HAL.
+     *
+     * @return masks supported audio masks.
+     */
+    getSupportedChannelMasks() generates (vec<AudioChannelMask> masks);
+
+    /*
+     * Sets the channel mask of the stream. Calling this method is equivalent to
+     * setting AUDIO_PARAMETER_STREAM_CHANNELS on the legacy HAL.
+     *
+     * @param format audio format.
+     * @return retval operation completion status.
+     */
+    setChannelMask(AudioChannelMask mask) generates (Result retval);
+
+    /*
+     * Return the audio format of the stream.
+     *
+     * @return format audio format.
+     */
+    getFormat() generates (AudioFormat format);
+
+    /*
+     * Return supported audio formats of the stream. Calling this method is
+     * equivalent to getting AUDIO_PARAMETER_STREAM_SUP_FORMATS on the legacy
+     * HAL.
+     *
+     * @return formats supported audio formats.
+     */
+    getSupportedFormats() generates (vec<AudioFormat> formats);
+
+    /*
+     * Sets the audio format of the stream. Calling this method is equivalent to
+     * setting AUDIO_PARAMETER_STREAM_FORMAT on the legacy HAL.
+     *
+     * @param format audio format.
+     * @return retval operation completion status.
+     */
+    setFormat(AudioFormat format) generates (Result retval);
+
+    /*
+     * Convenience method for retrieving several stream parameters in
+     * one transaction.
+     *
+     * @return sampleRateHz sample rate in Hz.
+     * @return mask channel mask.
+     * @return format audio format.
+     */
+    getAudioProperties() generates (
+            uint32_t sampleRateHz, AudioChannelMask mask, AudioFormat format);
+
+    /*
+     * Applies audio effect to the stream.
+     *
+     * @param effect the effect to apply.
+     * @return retval operation completion status.
+     */
+    addEffect(IEffect effect) generates (Result retval);
+
+    /*
+     * Stops application of the effect to the stream.
+     *
+     * @param effect the effect to apply.
+     * @return retval operation completion status.
+     */
+    removeEffect(IEffect effect) generates (Result retval);
+
+    /*
+     * Put the audio hardware input/output into standby mode.
+     * Driver must exit from standby mode at the next I/O operation.
+     *
+     * @return retval operation completion status.
+     */
+    standby() generates (Result retval);
+
+    /*
+     * Return the set of device(s) which this stream is connected to.
+     *
+     * @return retval operation completion status.
+     * @return device set of device(s) which this stream is connected to.
+     */
+    getDevice() generates (Result retval, AudioDevice device);
+
+    /*
+     * Connects the stream to the device.
+     *
+     * This method must only be used for HALs that do not support
+     * 'IDevice.createAudioPatch' method. Calling this method is
+     * equivalent to setting AUDIO_PARAMETER_STREAM_ROUTING in the legacy HAL
+     * interface.
+     *
+     * @param address device to connect the stream to.
+     * @return retval operation completion status.
+     */
+    setDevice(DeviceAddress address) generates (Result retval);
+
+    /*
+     * Notifies the stream about device connection state. Calling this method is
+     * equivalent to setting AUDIO_PARAMETER_DEVICE_[DIS]CONNECT on the legacy
+     * HAL.
+     *
+     * @param address audio device specification.
+     * @param connected whether the device is connected.
+     * @return retval operation completion status.
+     */
+    setConnectedState(DeviceAddress address, bool connected)
+            generates (Result retval);
+
+    /*
+     * Sets the HW synchronization source. Calling this method is equivalent to
+     * setting AUDIO_PARAMETER_STREAM_HW_AV_SYNC on the legacy HAL.
+     *
+     * @param hwAvSync HW synchronization source
+     * @return retval operation completion status.
+     */
+    setHwAvSync(AudioHwSync hwAvSync) generates (Result retval);
+
+    /*
+     * Generic method for retrieving vendor-specific parameter values.
+     * The framework does not interpret the parameters, they are passed
+     * in an opaque manner between a vendor application and HAL.
+     *
+     * @param keys parameter keys.
+     * @return retval operation completion status.
+     * @return parameters parameter key value pairs.
+     */
+    getParameters(vec<string> keys)
+            generates (Result retval, vec<ParameterValue> parameters);
+
+    /*
+     * Generic method for setting vendor-specific parameter values.
+     * The framework does not interpret the parameters, they are passed
+     * in an opaque manner between a vendor application and HAL.
+     *
+     * @param parameters parameter key value pairs.
+     * @return retval operation completion status.
+     */
+    setParameters(vec<ParameterValue> parameters) generates (Result retval);
+
+    /*
+     * Dumps information about the stream into the provided file descriptor.
+     * This is used for the dumpsys facility.
+     *
+     * @param fd dump file descriptor.
+     */
+    debugDump(handle fd);
+};
diff --git a/audio/2.0/IStreamIn.hal b/audio/2.0/IStreamIn.hal
new file mode 100644
index 0000000..049df75
--- /dev/null
+++ b/audio/2.0/IStreamIn.hal
@@ -0,0 +1,85 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+import IStream;
+
+interface IStreamIn extends IStream {
+    typedef android.hardware.audio@2.0::Result Result;
+
+    /*
+     * Returns the source descriptor of the input stream. Calling this method is
+     * equivalent to getting AUDIO_PARAMETER_STREAM_INPUT_SOURCE on the legacy
+     * HAL.
+     *
+     * @return retval operation completion status.
+     * @return source audio source.
+     */
+    getAudioSource() generates (Result retval, AudioSource source);
+
+    /*
+     * Set the input gain for the audio driver.
+     *
+     * @param gain 1.0f is unity, 0.0f is zero.
+     * @result retval operation completion status.
+     */
+    setGain(float gain) generates (Result retval);
+
+    /*
+     * Read audio buffer in from driver. If at least one frame was read prior to
+     * the error, 'read' must return that byte count and then return an error
+     * in the subsequent call.
+     *
+     * @param size maximum amount of bytes to read.
+     * @return retval operation completion status.
+     * @return data audio data.
+     */
+    // TODO(mnaganov): Replace with FMQ version.
+    read(uint64_t size) generates (Result retval, vec<uint8_t> data);
+
+    /*
+     * Return the amount of input frames lost in the audio driver since the last
+     * call of this function.
+     *
+     * Audio driver is expected to reset the value to 0 and restart counting
+     * upon returning the current value by this function call. Such loss
+     * typically occurs when the user space process is blocked longer than the
+     * capacity of audio driver buffers.
+     *
+     * @return retval operation completion status.
+     * @return framesLost the number of input audio frames lost.
+     */
+    getInputFramesLost() generates (Result retval, uint32_t framesLost);
+
+    /**
+     * Return a recent count of the number of audio frames received and the
+     * clock time associated with that frame count.
+     *
+     * @return retval INVALID_STATE if the device is not ready/available,
+     *                NOT_SUPPORTED if the command is not supported,
+     *                OK otherwise.
+     * @return frames the total frame count received. This must be as early in
+     *                the capture pipeline as possible. In general, frames
+     *                must be non-negative and must not go "backwards".
+     * @return time is the clock monotonic time when frames was measured. In
+     *              general, time must be a positive quantity and must not
+     *              go "backwards".
+     */
+    getCapturePosition()
+            generates (Result retval, uint64_t frames, uint64_t time);
+};
diff --git a/audio/2.0/IStreamOut.hal b/audio/2.0/IStreamOut.hal
new file mode 100644
index 0000000..adce538
--- /dev/null
+++ b/audio/2.0/IStreamOut.hal
@@ -0,0 +1,191 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+import IStream;
+import IStreamOutCallback;
+
+interface IStreamOut extends IStream {
+    typedef android.hardware.audio@2.0::Result Result;
+
+    /*
+     * Return the audio hardware driver estimated latency in milliseconds.
+     *
+     * @return latencyMs latency in milliseconds.
+     */
+    getLatency() generates (uint32_t latencyMs);
+
+    /*
+     * This method is used in situations where audio mixing is done in the
+     * hardware. This method serves as a direct interface with hardware,
+     * allowing to directly set the volume as apposed to via the framework.
+     * This method might produce multiple PCM outputs or hardware accelerated
+     * codecs, such as MP3 or AAC.
+     *
+     * @param left left channel attenuation, 1.0f is unity, 0.0f is zero.
+     * @param right right channel attenuation, 1.0f is unity, 0.0f is zero.
+     * @return retval operation completion status.
+     */
+    setVolume(float left, float right) generates (Result retval);
+
+    /*
+     * Write audio buffer to driver. On success, sets 'retval' to 'OK', and
+     * returns number of bytes written. If at least one frame was written
+     * successfully prior to the error, it is suggested that the driver return
+     * that successful (short) byte count and then return an error in the
+     * subsequent call.
+     *
+     * If 'setCallback' has previously been called to enable non-blocking mode
+     * then 'write' is not allowed to block. It must write only the number of
+     * bytes that currently fit in the driver/hardware buffer and then return
+     * this byte count. If this is less than the requested write size the
+     * callback function must be called when more space is available in the
+     * driver/hardware buffer.
+     *
+     * @param data audio data.
+     * @return retval operation completion status.
+     * @return written number of bytes written.
+     */
+    // TODO(mnaganov): Replace with FMQ version.
+    write(vec<uint8_t> data) generates (Result retval, uint64_t written);
+
+    /*
+     * Return the number of audio frames written by the audio DSP to DAC since
+     * the output has exited standby.
+     *
+     * @return retval operation completion status.
+     * @return dspFrames number of audio frames written.
+     */
+    getRenderPosition() generates (Result retval, uint32_t dspFrames);
+
+    /*
+     * Get the local time at which the next write to the audio driver will be
+     * presented. The units are microseconds, where the epoch is decided by the
+     * local audio HAL.
+     *
+     * @return retval operation completion status.
+     * @return timestampUs time of the next write.
+     */
+    getNextWriteTimestamp() generates (Result retval, int64_t timestampUs);
+
+    /*
+     * Set the callback interface for notifying completion of non-blocking
+     * write and drain.
+     *
+     * Calling this function implies that all future 'write' and 'drain'
+     * must be non-blocking and use the callback to signal completion.
+     *
+     * @return retval operation completion status.
+     */
+    setCallback(IStreamOutCallback callback) generates (Result retval);
+
+    /*
+     * Returns whether HAL supports pausing and resuming of streams.
+     *
+     * @return supportsPause true if pausing is supported.
+     * @return supportsResume true if resume is supported.
+     */
+    supportsPauseAndResume()
+            generates (bool supportsPause, bool supportsResume);
+
+    /**
+     * Notifies to the audio driver to stop playback however the queued buffers
+     * are retained by the hardware. Useful for implementing pause/resume. Empty
+     * implementation if not supported however must be implemented for hardware
+     * with non-trivial latency. In the pause state, some audio hardware may
+     * still be using power. Client code may consider calling 'suspend' after a
+     * timeout to prevent that excess power usage.
+     *
+     * Implementation of this function is mandatory for offloaded playback.
+     *
+     * @return retval operation completion status.
+     */
+    pause() generates (Result retval);
+
+    /*
+     * Notifies to the audio driver to resume playback following a pause.
+     * Returns error INVALID_STATE if called without matching pause.
+     *
+     * Implementation of this function is mandatory for offloaded playback.
+     *
+     * @return retval operation completion status.
+     */
+    resume() generates (Result retval);
+
+    /*
+     * Returns whether HAL supports draining of streams.
+     *
+     * @return supports true if draining is supported.
+     */
+    supportsDrain() generates (bool supports);
+
+    /**
+     * Requests notification when data buffered by the driver/hardware has been
+     * played. If 'setCallback' has previously been called to enable
+     * non-blocking mode, then 'drain' must not block, instead it must return
+     * quickly and completion of the drain is notified through the callback. If
+     * 'setCallback' has not been called, then 'drain' must block until
+     * completion.
+     *
+     * If 'type' is 'AUDIO_DRAIN_ALL', the drain completes when all previously
+     * written data has been played.
+     *
+     * If 'type' is 'AUDIO_DRAIN_EARLY_NOTIFY', the drain completes shortly
+     * before all data for the current track has played to allow time for the
+     * framework to perform a gapless track switch.
+     *
+     * Drain must return immediately on 'stop' and 'flush' calls.
+     *
+     * Implementation of this function is mandatory for offloaded playback.
+     *
+     * @param type type of drain.
+     * @return retval operation completion status.
+     */
+    drain(AudioDrain type) generates (Result retval);
+
+    /*
+     * Notifies to the audio driver to flush the queued data. Stream must
+     * already be paused before calling 'flush'.
+     *
+     * Implementation of this function is mandatory for offloaded playback.
+     *
+     * @return retval operation completion status.
+     */
+    flush() generates (Result retval);
+
+    /*
+     * Return a recent count of the number of audio frames presented to an
+     * external observer. This excludes frames which have been written but are
+     * still in the pipeline. The count is not reset to zero when output enters
+     * standby. Also returns the value of CLOCK_MONOTONIC as of this
+     * presentation count. The returned count is expected to be 'recent', but
+     * does not need to be the most recent possible value. However, the
+     * associated time must correspond to whatever count is returned.
+     *
+     * Example: assume that N+M frames have been presented, where M is a 'small'
+     * number. Then it is permissible to return N instead of N+M, and the
+     * timestamp must correspond to N rather than N+M. The terms 'recent' and
+     * 'small' are not defined. They reflect the quality of the implementation.
+     *
+     * @return retval operation completion status.
+     * @return frames count of presented audio frames.
+     * @return timeStamp associated clock time.
+     */
+    getPresentationPosition()
+            generates (Result retval, uint64_t frames, TimeSpec timeStamp);
+};
diff --git a/audio/2.0/IStreamOutCallback.hal b/audio/2.0/IStreamOutCallback.hal
new file mode 100644
index 0000000..267c46d
--- /dev/null
+++ b/audio/2.0/IStreamOutCallback.hal
@@ -0,0 +1,37 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+/*
+ * Asynchronous write callback interface.
+ */
+interface IStreamOutCallback {
+    /*
+     * Non blocking write completed.
+     */
+    onWriteReady();
+
+    /*
+     * Drain completed.
+     */
+    onDrainReady();
+
+    /*
+     * Stream hit an error.
+     */
+    onError();
+};
diff --git a/audio/2.0/types.hal b/audio/2.0/types.hal
new file mode 100644
index 0000000..6369885
--- /dev/null
+++ b/audio/2.0/types.hal
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+package android.hardware.audio@2.0;
+
+import android.hardware.audio.common@2.0;
+
+enum Result {
+    OK,
+    NOT_INITIALIZED,
+    INVALID_ARGUMENTS,
+    INVALID_STATE,
+    NOT_SUPPORTED
+};
+
+@export(name="audio_drain_type_t", value_prefix="AUDIO_DRAIN_")
+enum AudioDrain {
+    /* drain() returns when all data has been played. */
+    ALL,
+    /* drain() returns a short time before all data from the current track has
+       been played to give time for gapless track switch. */
+    EARLY_NOTIFY
+};
+
+/*
+ * A substitute for POSIX timespec.
+ */
+struct TimeSpec {
+    uint64_t tvSec;   // seconds
+    uint64_t tvNSec;  // nanoseconds
+};
+
+/*
+ * IEEE 802 MAC address.
+ */
+typedef uint8_t[6] MacAddress;
+
+struct ParameterValue {
+    string key;
+    string value;
+};
+
+/*
+ * Specifies a device in case when several devices of the same type
+ * can be connected (e.g. BT A2DP, USB).
+ */
+struct DeviceAddress {
+    AudioDevice device;  // discriminator
+    union Address {
+        MacAddress mac;     // used for BLUETOOTH_A2DP_*
+        uint8_t[4] ipv4;    // used for IP
+        struct Alsa {
+            int32_t card;
+            int32_t device;
+        } alsa;             // used for USB_*
+        int32_t busId;      // used for BUS
+    } address;
+    string rSubmixAddress;  // used for REMOTE_SUBMIX
+};