diff --git a/include/media/MmapStreamCallback.h b/include/media/MmapStreamCallback.h
new file mode 100644
index 0000000..8098e79
--- /dev/null
+++ b/include/media/MmapStreamCallback.h
@@ -0,0 +1,60 @@
+/*
+ * 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_AUDIO_MMAP_STREAM_CALLBACK_H
+#define ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H
+
+#include <system/audio.h>
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+namespace android {
+
+
+class MmapStreamCallback : public virtual RefBase {
+  public:
+
+    /**
+     * The mmap stream should be torn down because conditions that permitted its creation with
+     * the requested parameters have changed and do not allow it to operate with the requested
+     * constraints any more.
+     */
+    virtual void onTearDown() = 0;
+
+    /**
+     * The volume to be applied to the use case specified when opening the stream has changed
+     * \param[in] channels a channel mask containing all channels the volume should be applied to.
+     * \param[in] values the volume values to be applied to each channel. The size of the vector
+     *                   should correspond to the channel count retrieved with
+     *                   audio_channel_count_from_in_mask() or audio_channel_count_from_out_mask()
+     */
+    virtual void onVolumeChanged(audio_channel_mask_t channels, Vector<float> values) = 0;
+
+    /**
+     * The device the stream is routed to/from has changed
+     * \param[in] onRoutingChanged the unique device ID of the new device.
+     */
+    virtual void onRoutingChanged(audio_port_handle_t deviceId) = 0;
+
+  protected:
+    MmapStreamCallback() {}
+    virtual ~MmapStreamCallback() {}
+};
+
+
+} // namespace android
+
+#endif // ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H
diff --git a/include/media/MmapStreamInterface.h b/include/media/MmapStreamInterface.h
new file mode 100644
index 0000000..9f3731e
--- /dev/null
+++ b/include/media/MmapStreamInterface.h
@@ -0,0 +1,133 @@
+/*
+ * 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_AUDIO_MMAP_STREAM_INTERFACE_H
+#define ANDROID_AUDIO_MMAP_STREAM_INTERFACE_H
+
+#include <system/audio.h>
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+namespace android {
+
+class MmapStreamCallback;
+
+class MmapStreamInterface : public virtual RefBase
+{
+  public:
+
+    /**
+     * Values for direction argument passed to openMmapStream()
+     */
+    typedef enum {
+        DIRECTION_OUTPUT = 0,  /**< open a playback mmap stream */
+        DIRECTION_INPUT,       /**< open a capture mmap stream */
+    } stream_direction_t;
+
+    class Client {
+     public:
+        uid_t clientUid;
+        pid_t clientPid;
+        String16 packageName;
+    };
+    /**
+     * Open a playback or capture stream in MMAP mode at the audio HAL.
+     *
+     * \note This method is implemented by AudioFlinger
+     *
+     * \param[in] direction open a playback or capture stream.
+     * \param[in] attr audio attributes defining the main use case for this stream
+     * \param[in,out] config audio parameters (sampling rate, format ...) for the stream.
+     *                       Requested parameters as input,
+     *                       Actual parameters as output
+     * \param[in] client a Client struct describing the first client using this stream.
+     * \param[in,out] deviceId audio device the stream should preferably be routed to/from
+     *                       Requested as input,
+     *                       Actual as output
+     * \param[in] callback the MmapStreamCallback interface used by AudioFlinger to notify
+     *                     condition changes affecting the stream operation
+     * \param[out] interface the MmapStreamInterface interface controlling the created stream
+     * \return OK if the stream was successfully created.
+     *         NO_INIT if AudioFlinger is not properly initialized
+     *         BAD_VALUE if the stream cannot be opened because of invalid arguments
+     *         INVALID_OPERATION if the stream cannot be opened because of platform limitations
+     */
+    static status_t openMmapStream(stream_direction_t direction,
+                                           const audio_attributes_t *attr,
+                                           audio_config_base_t *config,
+                                           const Client& client,
+                                           audio_port_handle_t *deviceId,
+                                           const sp<MmapStreamCallback>& callback,
+                                           sp<MmapStreamInterface>& interface);
+
+    /**
+     * Retrieve information on the mmap buffer used for audio samples transfer.
+     *
+     * \param[in] min_size_frames minimum buffer size requested. The actual buffer
+     *        size returned in struct audio_mmap_buffer_info can be larger.
+     * \param[out] info address at which the mmap buffer information should be returned.
+     *
+     * \return OK if the buffer was allocated.
+     *         NO_INIT in case of initialization error
+     *         BAD_VALUE if the requested buffer size is too large
+     *         INVALID_OPERATION if called out of sequence (e.g. buffer already allocated)
+     */
+    virtual status_t createMmapBuffer(int32_t minSizeFrames,
+                                      struct audio_mmap_buffer_info *info) = 0;
+
+    /**
+     * Read current read/write position in the mmap buffer with associated time stamp.
+     *
+     * \param[out] position address at which the mmap read/write position should be returned.
+     *
+     * \return OK if the position is successfully returned.
+     *         NOT_ENOUGH_DATA if the position cannot be retrieved
+     *         INVALID_OPERATION if called before createMmapBuffer()
+     */
+    virtual status_t getMmapPosition(struct audio_mmap_position *position) = 0;
+
+    /**
+     * Start a stream operating in mmap mode.
+     * createMmapBuffer() must be called before calling start()
+     *
+     * \param[in] client a Client struct describing the client starting on this stream.
+     * \param[out] handle unique handle for this instance. Used with stop().
+     * \return OK in case of success.
+     *         INVALID_OPERATION if called out of sequence
+     */
+    virtual status_t start(const Client& client, audio_port_handle_t *handle) = 0;
+
+    /**
+     * Stop a stream operating in mmap mode.
+     * Must be called after start()
+     *
+     * \param[in] handle unique handle allocated by start().
+     * \return OK in case of success.
+     *         INVALID_OPERATION if called out of sequence
+     */
+    virtual status_t stop(audio_port_handle_t handle) = 0;
+
+  protected:
+    // Subclasses can not be constructed directly by clients.
+    MmapStreamInterface() {}
+
+    // The destructor automatically closes the stream.
+    virtual ~MmapStreamInterface() {}
+};
+
+} // namespace android
+
+#endif // ANDROID_AUDIO_MMAP_STREAM_INTERFACE_H