diff --git a/services/audioflinger/DeviceHalInterface.h b/services/audioflinger/DeviceHalInterface.h
new file mode 100644
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--- /dev/null
+++ b/services/audioflinger/DeviceHalInterface.h
@@ -0,0 +1,119 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HARDWARE_DEVICE_HAL_INTERFACE_H
+#define ANDROID_HARDWARE_DEVICE_HAL_INTERFACE_H
+
+#include <hardware/audio.h>
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+
+namespace android {
+
+class DeviceHalInterface : public RefBase
+{
+  public:
+    // The destructor automatically closes the device.
+    virtual ~DeviceHalInterface() {}
+
+    // Sets the value of 'devices' to a bitmask of 1 or more values of audio_devices_t.
+    virtual status_t getSupportedDevices(uint32_t *devices) = 0;
+
+    // Get the hardware module version.
+    virtual status_t getVersion(uint32_t *version) = 0;
+
+    // Check to see if the audio hardware interface has been initialized.
+    virtual status_t initCheck() = 0;
+
+    // Set the audio volume of a voice call. Range is between 0.0 and 1.0.
+    virtual status_t setVoiceVolume(float volume) = 0;
+
+    // Set the audio volume for all audio activities other than voice call.
+    virtual status_t setMasterVolume(float volume) = 0;
+
+    // Get the current master volume value for the HAL.
+    virtual status_t getMasterVolume(float *volume) = 0;
+
+    // Called when the audio mode changes.
+    virtual status_t setMode(audio_mode_t mode) = 0;
+
+    // Muting control.
+    virtual status_t setMicMute(bool state) = 0;
+    virtual status_t getMicMute(bool *state) = 0;
+    virtual status_t setMasterMute(bool state) = 0;
+    virtual status_t getMasterMute(bool *state) = 0;
+
+    // Set global audio parameters.
+    virtual status_t setParameters(const String8& kvPairs) = 0;
+
+    // Get global audio parameters.
+    virtual status_t getParameters(const String8& keys, String8 *values) = 0;
+
+    // Returns audio input buffer size according to parameters passed.
+    virtual status_t getInputBufferSize(const struct audio_config *config,
+            size_t *size) = 0;
+
+    // Creates and opens the audio hardware output stream. The stream is closed
+    // by releasing all references to the returned object.
+    // FIXME: Enable when StreamOutHalInterface is introduced.
+    // virtual status_t openOutputStream(
+    //         audio_io_handle_t handle,
+    //         audio_devices_t devices,
+    //         audio_output_flags_t flags,
+    //         struct audio_config *config,
+    //         const char *address,
+    //         sp<StreamOutHalInterface> *outStream) = 0;
+
+    // Creates and opens the audio hardware input stream. The stream is closed
+    // by releasing all references to the returned object.
+    // FIXME: Enable when StreamInHalInterface is introduced.
+    // virtual status_t openInputStream(
+    //         audio_io_handle_t handle,
+    //         audio_devices_t devices,
+    //         struct audio_config *config,
+    //         audio_input_flags_t flags,
+    //         const char *address,
+    //         audio_source_t source,
+    //         sp<StreamInHalInterface> *inStream) = 0;
+
+    // Creates an audio patch between several source and sink ports.
+    virtual status_t createAudioPatch(
+            unsigned int num_sources,
+            const struct audio_port_config *sources,
+            unsigned int num_sinks,
+            const struct audio_port_config *sinks,
+            audio_patch_handle_t *patch) = 0;
+
+    // Releases an audio patch.
+    virtual status_t releaseAudioPatch(audio_patch_handle_t patch) = 0;
+
+    // Fills the list of supported attributes for a given audio port.
+    virtual status_t getAudioPort(struct audio_port *port) = 0;
+
+    // Set audio port configuration.
+    virtual status_t setAudioPortConfig(const struct audio_port_config *config) = 0;
+
+    virtual status_t dump(int fd) = 0;
+
+  protected:
+    // Subclasses can not be constructed directly by clients.
+    DeviceHalInterface() {}
+};
+
+} // namespace android
+
+#endif // ANDROID_HARDWARE_DEVICE_HAL_INTERFACE_H