Camera: Rename new API to camera2, rearrange camera service

 - Support API rename from photography to camera2
 - Reorganize camera service files
   - API support files to api1/, api2/, api_pro/
   - HAL device support files into device{1,2,3}/
   - Common files into common/
   - Camera service remains at top-level

Change-Id: Ie474c12536f543832fba0a2dc936ac4fd39fe6a9

1 files changed, 691 insertions, 0 deletions

diff --git a/services/camera/libcameraservice/device1/CameraHardwareInterface.h b/services/camera/libcameraservice/device1/CameraHardwareInterface.h
new file mode 100644
index 0000000..87b2807
--- /dev/null
+++ b/services/camera/libcameraservice/device1/CameraHardwareInterface.h
@@ -0,0 +1,691 @@
+/*
+ * Copyright (C) 2008 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_CAMERA_HARDWARE_INTERFACE_H
+#define ANDROID_HARDWARE_CAMERA_HARDWARE_INTERFACE_H
+
+#include <binder/IMemory.h>
+#include <binder/MemoryBase.h>
+#include <binder/MemoryHeapBase.h>
+#include <utils/RefBase.h>
+#include <ui/GraphicBuffer.h>
+#include <camera/Camera.h>
+#include <camera/CameraParameters.h>
+#include <system/window.h>
+#include <hardware/camera.h>
+
+namespace android {
+
+typedef void (*notify_callback)(int32_t msgType,
+                            int32_t ext1,
+                            int32_t ext2,
+                            void* user);
+
+typedef void (*data_callback)(int32_t msgType,
+                            const sp<IMemory> &dataPtr,
+                            camera_frame_metadata_t *metadata,
+                            void* user);
+
+typedef void (*data_callback_timestamp)(nsecs_t timestamp,
+                            int32_t msgType,
+                            const sp<IMemory> &dataPtr,
+                            void *user);
+
+/**
+ * CameraHardwareInterface.h defines the interface to the
+ * camera hardware abstraction layer, used for setting and getting
+ * parameters, live previewing, and taking pictures. It is used for
+ * HAL devices with version CAMERA_DEVICE_API_VERSION_1_0 only.
+ *
+ * It is a referenced counted interface with RefBase as its base class.
+ * CameraService calls openCameraHardware() to retrieve a strong pointer to the
+ * instance of this interface and may be called multiple times. The
+ * following steps describe a typical sequence:
+ *
+ *   -# After CameraService calls openCameraHardware(), getParameters() and
+ *      setParameters() are used to initialize the camera instance.
+ *   -# startPreview() is called.
+ *
+ * Prior to taking a picture, CameraService often calls autofocus(). When auto
+ * focusing has completed, the camera instance sends a CAMERA_MSG_FOCUS notification,
+ * which informs the application whether focusing was successful. The camera instance
+ * only sends this message once and it is up  to the application to call autoFocus()
+ * again if refocusing is desired.
+ *
+ * CameraService calls takePicture() to request the camera instance take a
+ * picture. At this point, if a shutter, postview, raw, and/or compressed
+ * callback is desired, the corresponding message must be enabled. Any memory
+ * provided in a data callback must be copied if it's needed after returning.
+ */
+
+class CameraHardwareInterface : public virtual RefBase {
+public:
+    CameraHardwareInterface(const char *name)
+    {
+        mDevice = 0;
+        mName = name;
+    }
+
+    ~CameraHardwareInterface()
+    {
+        ALOGI("Destroying camera %s", mName.string());
+        if(mDevice) {
+            int rc = mDevice->common.close(&mDevice->common);
+            if (rc != OK)
+                ALOGE("Could not close camera %s: %d", mName.string(), rc);
+        }
+    }
+
+    status_t initialize(hw_module_t *module)
+    {
+        ALOGI("Opening camera %s", mName.string());
+        int rc = module->methods->open(module, mName.string(),
+                                       (hw_device_t **)&mDevice);
+        if (rc != OK) {
+            ALOGE("Could not open camera %s: %d", mName.string(), rc);
+            return rc;
+        }
+        initHalPreviewWindow();
+        return rc;
+    }
+
+    /** Set the ANativeWindow to which preview frames are sent */
+    status_t setPreviewWindow(const sp<ANativeWindow>& buf)
+    {
+        ALOGV("%s(%s) buf %p", __FUNCTION__, mName.string(), buf.get());
+
+        if (mDevice->ops->set_preview_window) {
+            mPreviewWindow = buf;
+            mHalPreviewWindow.user = this;
+            ALOGV("%s &mHalPreviewWindow %p mHalPreviewWindow.user %p", __FUNCTION__,
+                    &mHalPreviewWindow, mHalPreviewWindow.user);
+            return mDevice->ops->set_preview_window(mDevice,
+                    buf.get() ? &mHalPreviewWindow.nw : 0);
+        }
+        return INVALID_OPERATION;
+    }
+
+    /** Set the notification and data callbacks */
+    void setCallbacks(notify_callback notify_cb,
+                      data_callback data_cb,
+                      data_callback_timestamp data_cb_timestamp,
+                      void* user)
+    {
+        mNotifyCb = notify_cb;
+        mDataCb = data_cb;
+        mDataCbTimestamp = data_cb_timestamp;
+        mCbUser = user;
+
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+
+        if (mDevice->ops->set_callbacks) {
+            mDevice->ops->set_callbacks(mDevice,
+                                   __notify_cb,
+                                   __data_cb,
+                                   __data_cb_timestamp,
+                                   __get_memory,
+                                   this);
+        }
+    }
+
+    /**
+     * The following three functions all take a msgtype,
+     * which is a bitmask of the messages defined in
+     * include/ui/Camera.h
+     */
+
+    /**
+     * Enable a message, or set of messages.
+     */
+    void enableMsgType(int32_t msgType)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->enable_msg_type)
+            mDevice->ops->enable_msg_type(mDevice, msgType);
+    }
+
+    /**
+     * Disable a message, or a set of messages.
+     *
+     * Once received a call to disableMsgType(CAMERA_MSG_VIDEO_FRAME), camera hal
+     * should not rely on its client to call releaseRecordingFrame() to release
+     * video recording frames sent out by the cameral hal before and after the
+     * disableMsgType(CAMERA_MSG_VIDEO_FRAME) call. Camera hal clients must not
+     * modify/access any video recording frame after calling
+     * disableMsgType(CAMERA_MSG_VIDEO_FRAME).
+     */
+    void disableMsgType(int32_t msgType)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->disable_msg_type)
+            mDevice->ops->disable_msg_type(mDevice, msgType);
+    }
+
+    /**
+     * Query whether a message, or a set of messages, is enabled.
+     * Note that this is operates as an AND, if any of the messages
+     * queried are off, this will return false.
+     */
+    int msgTypeEnabled(int32_t msgType)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->msg_type_enabled)
+            return mDevice->ops->msg_type_enabled(mDevice, msgType);
+        return false;
+    }
+
+    /**
+     * Start preview mode.
+     */
+    status_t startPreview()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->start_preview)
+            return mDevice->ops->start_preview(mDevice);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Stop a previously started preview.
+     */
+    void stopPreview()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->stop_preview)
+            mDevice->ops->stop_preview(mDevice);
+    }
+
+    /**
+     * Returns true if preview is enabled.
+     */
+    int previewEnabled()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->preview_enabled)
+            return mDevice->ops->preview_enabled(mDevice);
+        return false;
+    }
+
+    /**
+     * Request the camera hal to store meta data or real YUV data in
+     * the video buffers send out via CAMERA_MSG_VIDEO_FRRAME for a
+     * recording session. If it is not called, the default camera
+     * hal behavior is to store real YUV data in the video buffers.
+     *
+     * This method should be called before startRecording() in order
+     * to be effective.
+     *
+     * If meta data is stored in the video buffers, it is up to the
+     * receiver of the video buffers to interpret the contents and
+     * to find the actual frame data with the help of the meta data
+     * in the buffer. How this is done is outside of the scope of
+     * this method.
+     *
+     * Some camera hal may not support storing meta data in the video
+     * buffers, but all camera hal should support storing real YUV data
+     * in the video buffers. If the camera hal does not support storing
+     * the meta data in the video buffers when it is requested to do
+     * do, INVALID_OPERATION must be returned. It is very useful for
+     * the camera hal to pass meta data rather than the actual frame
+     * data directly to the video encoder, since the amount of the
+     * uncompressed frame data can be very large if video size is large.
+     *
+     * @param enable if true to instruct the camera hal to store
+     *      meta data in the video buffers; false to instruct
+     *      the camera hal to store real YUV data in the video
+     *      buffers.
+     *
+     * @return OK on success.
+     */
+
+    status_t storeMetaDataInBuffers(int enable)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->store_meta_data_in_buffers)
+            return mDevice->ops->store_meta_data_in_buffers(mDevice, enable);
+        return enable ? INVALID_OPERATION: OK;
+    }
+
+    /**
+     * Start record mode. When a record image is available a CAMERA_MSG_VIDEO_FRAME
+     * message is sent with the corresponding frame. Every record frame must be released
+     * by a cameral hal client via releaseRecordingFrame() before the client calls
+     * disableMsgType(CAMERA_MSG_VIDEO_FRAME). After the client calls
+     * disableMsgType(CAMERA_MSG_VIDEO_FRAME), it is camera hal's responsibility
+     * to manage the life-cycle of the video recording frames, and the client must
+     * not modify/access any video recording frames.
+     */
+    status_t startRecording()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->start_recording)
+            return mDevice->ops->start_recording(mDevice);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Stop a previously started recording.
+     */
+    void stopRecording()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->stop_recording)
+            mDevice->ops->stop_recording(mDevice);
+    }
+
+    /**
+     * Returns true if recording is enabled.
+     */
+    int recordingEnabled()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->recording_enabled)
+            return mDevice->ops->recording_enabled(mDevice);
+        return false;
+    }
+
+    /**
+     * Release a record frame previously returned by CAMERA_MSG_VIDEO_FRAME.
+     *
+     * It is camera hal client's responsibility to release video recording
+     * frames sent out by the camera hal before the camera hal receives
+     * a call to disableMsgType(CAMERA_MSG_VIDEO_FRAME). After it receives
+     * the call to disableMsgType(CAMERA_MSG_VIDEO_FRAME), it is camera hal's
+     * responsibility of managing the life-cycle of the video recording
+     * frames.
+     */
+    void releaseRecordingFrame(const sp<IMemory>& mem)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->release_recording_frame) {
+            ssize_t offset;
+            size_t size;
+            sp<IMemoryHeap> heap = mem->getMemory(&offset, &size);
+            void *data = ((uint8_t *)heap->base()) + offset;
+            return mDevice->ops->release_recording_frame(mDevice, data);
+        }
+    }
+
+    /**
+     * Start auto focus, the notification callback routine is called
+     * with CAMERA_MSG_FOCUS once when focusing is complete. autoFocus()
+     * will be called again if another auto focus is needed.
+     */
+    status_t autoFocus()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->auto_focus)
+            return mDevice->ops->auto_focus(mDevice);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Cancels auto-focus function. If the auto-focus is still in progress,
+     * this function will cancel it. Whether the auto-focus is in progress
+     * or not, this function will return the focus position to the default.
+     * If the camera does not support auto-focus, this is a no-op.
+     */
+    status_t cancelAutoFocus()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->cancel_auto_focus)
+            return mDevice->ops->cancel_auto_focus(mDevice);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Take a picture.
+     */
+    status_t takePicture()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->take_picture)
+            return mDevice->ops->take_picture(mDevice);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Cancel a picture that was started with takePicture.  Calling this
+     * method when no picture is being taken is a no-op.
+     */
+    status_t cancelPicture()
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->cancel_picture)
+            return mDevice->ops->cancel_picture(mDevice);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Set the camera parameters. This returns BAD_VALUE if any parameter is
+     * invalid or not supported. */
+    status_t setParameters(const CameraParameters &params)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->set_parameters)
+            return mDevice->ops->set_parameters(mDevice,
+                                               params.flatten().string());
+        return INVALID_OPERATION;
+    }
+
+    /** Return the camera parameters. */
+    CameraParameters getParameters() const
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        CameraParameters parms;
+        if (mDevice->ops->get_parameters) {
+            char *temp = mDevice->ops->get_parameters(mDevice);
+            String8 str_parms(temp);
+            if (mDevice->ops->put_parameters)
+                mDevice->ops->put_parameters(mDevice, temp);
+            else
+                free(temp);
+            parms.unflatten(str_parms);
+        }
+        return parms;
+    }
+
+    /**
+     * Send command to camera driver.
+     */
+    status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->send_command)
+            return mDevice->ops->send_command(mDevice, cmd, arg1, arg2);
+        return INVALID_OPERATION;
+    }
+
+    /**
+     * Release the hardware resources owned by this object.  Note that this is
+     * *not* done in the destructor.
+     */
+    void release() {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->release)
+            mDevice->ops->release(mDevice);
+    }
+
+    /**
+     * Dump state of the camera hardware
+     */
+    status_t dump(int fd, const Vector<String16>& /*args*/) const
+    {
+        ALOGV("%s(%s)", __FUNCTION__, mName.string());
+        if (mDevice->ops->dump)
+            return mDevice->ops->dump(mDevice, fd);
+        return OK; // It's fine if the HAL doesn't implement dump()
+    }
+
+private:
+    camera_device_t *mDevice;
+    String8 mName;
+
+    static void __notify_cb(int32_t msg_type, int32_t ext1,
+                            int32_t ext2, void *user)
+    {
+        ALOGV("%s", __FUNCTION__);
+        CameraHardwareInterface *__this =
+                static_cast<CameraHardwareInterface *>(user);
+        __this->mNotifyCb(msg_type, ext1, ext2, __this->mCbUser);
+    }
+
+    static void __data_cb(int32_t msg_type,
+                          const camera_memory_t *data, unsigned int index,
+                          camera_frame_metadata_t *metadata,
+                          void *user)
+    {
+        ALOGV("%s", __FUNCTION__);
+        CameraHardwareInterface *__this =
+                static_cast<CameraHardwareInterface *>(user);
+        sp<CameraHeapMemory> mem(static_cast<CameraHeapMemory *>(data->handle));
+        if (index >= mem->mNumBufs) {
+            ALOGE("%s: invalid buffer index %d, max allowed is %d", __FUNCTION__,
+                 index, mem->mNumBufs);
+            return;
+        }
+        __this->mDataCb(msg_type, mem->mBuffers[index], metadata, __this->mCbUser);
+    }
+
+    static void __data_cb_timestamp(nsecs_t timestamp, int32_t msg_type,
+                             const camera_memory_t *data, unsigned index,
+                             void *user)
+    {
+        ALOGV("%s", __FUNCTION__);
+        CameraHardwareInterface *__this =
+                static_cast<CameraHardwareInterface *>(user);
+        // Start refcounting the heap object from here on.  When the clients
+        // drop all references, it will be destroyed (as well as the enclosed
+        // MemoryHeapBase.
+        sp<CameraHeapMemory> mem(static_cast<CameraHeapMemory *>(data->handle));
+        if (index >= mem->mNumBufs) {
+            ALOGE("%s: invalid buffer index %d, max allowed is %d", __FUNCTION__,
+                 index, mem->mNumBufs);
+            return;
+        }
+        __this->mDataCbTimestamp(timestamp, msg_type, mem->mBuffers[index], __this->mCbUser);
+    }
+
+    // This is a utility class that combines a MemoryHeapBase and a MemoryBase
+    // in one.  Since we tend to use them in a one-to-one relationship, this is
+    // handy.
+
+    class CameraHeapMemory : public RefBase {
+    public:
+        CameraHeapMemory(int fd, size_t buf_size, uint_t num_buffers = 1) :
+                         mBufSize(buf_size),
+                         mNumBufs(num_buffers)
+        {
+            mHeap = new MemoryHeapBase(fd, buf_size * num_buffers);
+            commonInitialization();
+        }
+
+        CameraHeapMemory(size_t buf_size, uint_t num_buffers = 1) :
+                         mBufSize(buf_size),
+                         mNumBufs(num_buffers)
+        {
+            mHeap = new MemoryHeapBase(buf_size * num_buffers);
+            commonInitialization();
+        }
+
+        void commonInitialization()
+        {
+            handle.data = mHeap->base();
+            handle.size = mBufSize * mNumBufs;
+            handle.handle = this;
+
+            mBuffers = new sp<MemoryBase>[mNumBufs];
+            for (uint_t i = 0; i < mNumBufs; i++)
+                mBuffers[i] = new MemoryBase(mHeap,
+                                             i * mBufSize,
+                                             mBufSize);
+
+            handle.release = __put_memory;
+        }
+
+        virtual ~CameraHeapMemory()
+        {
+            delete [] mBuffers;
+        }
+
+        size_t mBufSize;
+        uint_t mNumBufs;
+        sp<MemoryHeapBase> mHeap;
+        sp<MemoryBase> *mBuffers;
+
+        camera_memory_t handle;
+    };
+
+    static camera_memory_t* __get_memory(int fd, size_t buf_size, uint_t num_bufs,
+                                         void *user __attribute__((unused)))
+    {
+        CameraHeapMemory *mem;
+        if (fd < 0)
+            mem = new CameraHeapMemory(buf_size, num_bufs);
+        else
+            mem = new CameraHeapMemory(fd, buf_size, num_bufs);
+        mem->incStrong(mem);
+        return &mem->handle;
+    }
+
+    static void __put_memory(camera_memory_t *data)
+    {
+        if (!data)
+            return;
+
+        CameraHeapMemory *mem = static_cast<CameraHeapMemory *>(data->handle);
+        mem->decStrong(mem);
+    }
+
+    static ANativeWindow *__to_anw(void *user)
+    {
+        CameraHardwareInterface *__this =
+                reinterpret_cast<CameraHardwareInterface *>(user);
+        return __this->mPreviewWindow.get();
+    }
+#define anw(n) __to_anw(((struct camera_preview_window *)n)->user)
+
+    static int __dequeue_buffer(struct preview_stream_ops* w,
+                                buffer_handle_t** buffer, int *stride)
+    {
+        int rc;
+        ANativeWindow *a = anw(w);
+        ANativeWindowBuffer* anb;
+        rc = native_window_dequeue_buffer_and_wait(a, &anb);
+        if (!rc) {
+            *buffer = &anb->handle;
+            *stride = anb->stride;
+        }
+        return rc;
+    }
+
+#ifndef container_of
+#define container_of(ptr, type, member) ({                      \
+        const typeof(((type *) 0)->member) *__mptr = (ptr);     \
+        (type *) ((char *) __mptr - (char *)(&((type *)0)->member)); })
+#endif
+
+    static int __lock_buffer(struct preview_stream_ops* w,
+                      buffer_handle_t* /*buffer*/)
+    {
+        ANativeWindow *a = anw(w);
+        (void)a;
+        return 0;
+    }
+
+    static int __enqueue_buffer(struct preview_stream_ops* w,
+                      buffer_handle_t* buffer)
+    {
+        ANativeWindow *a = anw(w);
+        return a->queueBuffer(a,
+                  container_of(buffer, ANativeWindowBuffer, handle), -1);
+    }
+
+    static int __cancel_buffer(struct preview_stream_ops* w,
+                      buffer_handle_t* buffer)
+    {
+        ANativeWindow *a = anw(w);
+        return a->cancelBuffer(a,
+                  container_of(buffer, ANativeWindowBuffer, handle), -1);
+    }
+
+    static int __set_buffer_count(struct preview_stream_ops* w, int count)
+    {
+        ANativeWindow *a = anw(w);
+        return native_window_set_buffer_count(a, count);
+    }
+
+    static int __set_buffers_geometry(struct preview_stream_ops* w,
+                      int width, int height, int format)
+    {
+        ANativeWindow *a = anw(w);
+        return native_window_set_buffers_geometry(a,
+                          width, height, format);
+    }
+
+    static int __set_crop(struct preview_stream_ops *w,
+                      int left, int top, int right, int bottom)
+    {
+        ANativeWindow *a = anw(w);
+        android_native_rect_t crop;
+        crop.left = left;
+        crop.top = top;
+        crop.right = right;
+        crop.bottom = bottom;
+        return native_window_set_crop(a, &crop);
+    }
+
+    static int __set_timestamp(struct preview_stream_ops *w,
+                               int64_t timestamp) {
+        ANativeWindow *a = anw(w);
+        return native_window_set_buffers_timestamp(a, timestamp);
+    }
+
+    static int __set_usage(struct preview_stream_ops* w, int usage)
+    {
+        ANativeWindow *a = anw(w);
+        return native_window_set_usage(a, usage);
+    }
+
+    static int __set_swap_interval(struct preview_stream_ops *w, int interval)
+    {
+        ANativeWindow *a = anw(w);
+        return a->setSwapInterval(a, interval);
+    }
+
+    static int __get_min_undequeued_buffer_count(
+                      const struct preview_stream_ops *w,
+                      int *count)
+    {
+        ANativeWindow *a = anw(w);
+        return a->query(a, NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, count);
+    }
+
+    void initHalPreviewWindow()
+    {
+        mHalPreviewWindow.nw.cancel_buffer = __cancel_buffer;
+        mHalPreviewWindow.nw.lock_buffer = __lock_buffer;
+        mHalPreviewWindow.nw.dequeue_buffer = __dequeue_buffer;
+        mHalPreviewWindow.nw.enqueue_buffer = __enqueue_buffer;
+        mHalPreviewWindow.nw.set_buffer_count = __set_buffer_count;
+        mHalPreviewWindow.nw.set_buffers_geometry = __set_buffers_geometry;
+        mHalPreviewWindow.nw.set_crop = __set_crop;
+        mHalPreviewWindow.nw.set_timestamp = __set_timestamp;
+        mHalPreviewWindow.nw.set_usage = __set_usage;
+        mHalPreviewWindow.nw.set_swap_interval = __set_swap_interval;
+
+        mHalPreviewWindow.nw.get_min_undequeued_buffer_count =
+                __get_min_undequeued_buffer_count;
+    }
+
+    sp<ANativeWindow>        mPreviewWindow;
+
+    struct camera_preview_window {
+        struct preview_stream_ops nw;
+        void *user;
+    };
+
+    struct camera_preview_window mHalPreviewWindow;
+
+    notify_callback         mNotifyCb;
+    data_callback           mDataCb;
+    data_callback_timestamp mDataCbTimestamp;
+    void *mCbUser;
+};
+
+};  // namespace android
+
+#endif