X-Git-Url: https://gerrit.akraino.org/r/gitweb?a=blobdiff_plain;f=src%2Ftype3_AndroidCloud%2Fanbox-master%2Fandroid%2Fcamera%2FEmulatedCamera.cpp;fp=src%2Ftype3_AndroidCloud%2Fanbox-master%2Fandroid%2Fcamera%2FEmulatedCamera.cpp;h=096c5b2ba3362f6d43e0dc8e9e09be0c4c176cb7;hb=e26c1ec581be598521517829adba8c8dd23a768f;hp=0000000000000000000000000000000000000000;hpb=6699c1aea74eeb0eb400e6299079f0c7576f716f;p=iec.git

diff --git a/src/type3_AndroidCloud/anbox-master/android/camera/EmulatedCamera.cpp b/src/type3_AndroidCloud/anbox-master/android/camera/EmulatedCamera.cpp
new file mode 100644
index 0000000..096c5b2
--- /dev/null
+++ b/src/type3_AndroidCloud/anbox-master/android/camera/EmulatedCamera.cpp
@@ -0,0 +1,1041 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+/*
+ * Contains implementation of a class EmulatedCamera that encapsulates
+ * functionality common to all emulated cameras ("fake", "webcam", "video file",
+ * etc.). Instances of this class (for each emulated camera) are created during
+ * the construction of the EmulatedCameraFactory instance. This class serves as
+ * an entry point for all camera API calls that defined by camera_device_ops_t
+ * API.
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "EmulatedCamera_Camera"
+#include <cutils/log.h>
+#include <ui/Rect.h>
+#include "EmulatedCamera.h"
+//#include "EmulatedFakeCameraDevice.h"
+#include "Converters.h"
+
+/* Defines whether we should trace parameter changes. */
+#define DEBUG_PARAM 1
+
+namespace android {
+
+#if DEBUG_PARAM
+/* Calculates and logs parameter changes.
+ * Param:
+ *  current - Current set of camera parameters.
+ *  new_par - String representation of new parameters.
+ */
+static void PrintParamDiff(const CameraParameters& current, const char* new_par);
+#else
+#define PrintParamDiff(current, new_par)   (void(0))
+#endif  /* DEBUG_PARAM */
+
+/* A helper routine that adds a value to the camera parameter.
+ * Param:
+ *  param - Camera parameter to add a value to.
+ *  val - Value to add.
+ * Return:
+ *  A new string containing parameter with the added value on success, or NULL on
+ *  a failure. If non-NULL string is returned, the caller is responsible for
+ *  freeing it with 'free'.
+ */
+static char* AddValue(const char* param, const char* val);
+
+EmulatedCamera::EmulatedCamera(int cameraId,
+                               struct hw_module_t* module)
+        : EmulatedBaseCamera(cameraId,
+                HARDWARE_DEVICE_API_VERSION(1, 0),
+                &common,
+                module),
+          mPreviewWindow(),
+          mCallbackNotifier()
+{
+    /* camera_device v1 fields. */
+    common.close = EmulatedCamera::close;
+    ops = &mDeviceOps;
+    priv = this;
+}
+
+EmulatedCamera::~EmulatedCamera()
+{
+}
+
+/****************************************************************************
+ * Public API
+ ***************************************************************************/
+
+status_t EmulatedCamera::Initialize()
+{
+    /* Preview formats supported by this HAL. */
+    char preview_formats[1024];
+    snprintf(preview_formats, sizeof(preview_formats), "%s,%s,%s",
+             CameraParameters::PIXEL_FORMAT_YUV420SP,
+             CameraParameters::PIXEL_FORMAT_YUV420P,
+             CameraParameters::PIXEL_FORMAT_RGBA8888);
+
+    /*
+     * Fake required parameters.
+     */
+
+    mParameters.set(CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES, "320x240,0x0");
+
+    mParameters.set(CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH, "512");
+    mParameters.set(CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT, "384");
+    mParameters.set(CameraParameters::KEY_JPEG_QUALITY, "90");
+    mParameters.set(CameraParameters::KEY_FOCAL_LENGTH, "4.31");
+    mParameters.set(CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE, "54.8");
+    mParameters.set(CameraParameters::KEY_VERTICAL_VIEW_ANGLE, "42.5");
+    mParameters.set(CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY, "90");
+
+    /* Preview format settings used here are related to panoramic view only. It's
+     * not related to the preview window that works only with RGB frames, which
+     * is explicitly stated when set_buffers_geometry is called on the preview
+     * window object. */
+    mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS,
+                    preview_formats);
+    mParameters.setPreviewFormat(CameraParameters::PIXEL_FORMAT_YUV420SP);
+
+    /* We don't relay on the actual frame rates supported by the camera device,
+     * since we will emulate them through timeouts in the emulated camera device
+     * worker thread. */
+    mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES,
+                    "30,24,20,15,10,5");
+    mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE, "(5,30)");
+    mParameters.set(CameraParameters::KEY_PREVIEW_FPS_RANGE, "5,30");
+    mParameters.setPreviewFrameRate(24);
+
+    /* Only PIXEL_FORMAT_YUV420P is accepted by video framework in emulator! */
+    mParameters.set(CameraParameters::KEY_VIDEO_FRAME_FORMAT,
+                    CameraParameters::PIXEL_FORMAT_YUV420P);
+    mParameters.set(CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS,
+                    CameraParameters::PIXEL_FORMAT_JPEG);
+    mParameters.setPictureFormat(CameraParameters::PIXEL_FORMAT_JPEG);
+
+    /* Set exposure compensation. */
+    mParameters.set(CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION, "6");
+    mParameters.set(CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION, "-6");
+    mParameters.set(CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP, "0.5");
+    mParameters.set(CameraParameters::KEY_EXPOSURE_COMPENSATION, "0");
+
+    /* Sets the white balance modes and the device-dependent scale factors. */
+    char supported_white_balance[1024];
+    snprintf(supported_white_balance, sizeof(supported_white_balance),
+             "%s,%s,%s,%s",
+             CameraParameters::WHITE_BALANCE_AUTO,
+             CameraParameters::WHITE_BALANCE_INCANDESCENT,
+             CameraParameters::WHITE_BALANCE_DAYLIGHT,
+             CameraParameters::WHITE_BALANCE_TWILIGHT);
+    mParameters.set(CameraParameters::KEY_SUPPORTED_WHITE_BALANCE,
+                    supported_white_balance);
+    mParameters.set(CameraParameters::KEY_WHITE_BALANCE,
+                    CameraParameters::WHITE_BALANCE_AUTO);
+    getCameraDevice()->initializeWhiteBalanceModes(
+            CameraParameters::WHITE_BALANCE_AUTO, 1.0f, 1.0f);
+    getCameraDevice()->initializeWhiteBalanceModes(
+            CameraParameters::WHITE_BALANCE_INCANDESCENT, 1.38f, 0.60f);
+    getCameraDevice()->initializeWhiteBalanceModes(
+            CameraParameters::WHITE_BALANCE_DAYLIGHT, 1.09f, 0.92f);
+    getCameraDevice()->initializeWhiteBalanceModes(
+            CameraParameters::WHITE_BALANCE_TWILIGHT, 0.92f, 1.22f);
+    getCameraDevice()->setWhiteBalanceMode(CameraParameters::WHITE_BALANCE_AUTO);
+
+    /* Not supported features
+     */
+    mParameters.set(CameraParameters::KEY_SUPPORTED_FOCUS_MODES,
+                    CameraParameters::FOCUS_MODE_FIXED);
+    mParameters.set(CameraParameters::KEY_FOCUS_MODE,
+                    CameraParameters::FOCUS_MODE_FIXED);
+
+    return NO_ERROR;
+}
+
+void EmulatedCamera::onNextFrameAvailable(const void* frame,
+                                          nsecs_t timestamp,
+                                          EmulatedCameraDevice* camera_dev)
+{
+    /* Notify the preview window first. */
+    mPreviewWindow.onNextFrameAvailable(frame, timestamp, camera_dev);
+
+    /* Notify callback notifier next. */
+    mCallbackNotifier.onNextFrameAvailable(frame, timestamp, camera_dev);
+}
+
+void EmulatedCamera::onCameraDeviceError(int err)
+{
+    /* Errors are reported through the callback notifier */
+    mCallbackNotifier.onCameraDeviceError(err);
+}
+
+/****************************************************************************
+ * Camera API implementation.
+ ***************************************************************************/
+
+status_t EmulatedCamera::connectCamera(hw_device_t** device)
+{
+    ALOGV("%s", __FUNCTION__);
+
+    status_t res = EINVAL;
+    EmulatedCameraDevice* const camera_dev = getCameraDevice();
+    ALOGE_IF(camera_dev == NULL, "%s: No camera device instance.", __FUNCTION__);
+
+    if (camera_dev != NULL) {
+        /* Connect to the camera device. */
+        res = getCameraDevice()->connectDevice();
+        if (res == NO_ERROR) {
+            *device = &common;
+        }
+    }
+
+    return -res;
+}
+
+status_t EmulatedCamera::closeCamera()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    return cleanupCamera();
+}
+
+status_t EmulatedCamera::getCameraInfo(struct camera_info* info)
+{
+    ALOGV("%s", __FUNCTION__);
+
+    const char* valstr = NULL;
+
+    valstr = mParameters.get(EmulatedCamera::FACING_KEY);
+    if (valstr != NULL) {
+        if (strcmp(valstr, EmulatedCamera::FACING_FRONT) == 0) {
+            info->facing = CAMERA_FACING_FRONT;
+        }
+        else if (strcmp(valstr, EmulatedCamera::FACING_BACK) == 0) {
+            info->facing = CAMERA_FACING_BACK;
+        }
+    } else {
+        info->facing = CAMERA_FACING_BACK;
+    }
+
+    valstr = mParameters.get(EmulatedCamera::ORIENTATION_KEY);
+    if (valstr != NULL) {
+        info->orientation = atoi(valstr);
+    } else {
+        info->orientation = 0;
+    }
+
+    return EmulatedBaseCamera::getCameraInfo(info);
+}
+
+status_t EmulatedCamera::setPreviewWindow(struct preview_stream_ops* window)
+{
+    /* Callback should return a negative errno. */
+    return -mPreviewWindow.setPreviewWindow(window,
+                                             mParameters.getPreviewFrameRate());
+}
+
+void EmulatedCamera::setCallbacks(camera_notify_callback notify_cb,
+                                  camera_data_callback data_cb,
+                                  camera_data_timestamp_callback data_cb_timestamp,
+                                  camera_request_memory get_memory,
+                                  void* user)
+{
+    mCallbackNotifier.setCallbacks(notify_cb, data_cb, data_cb_timestamp,
+                                    get_memory, user);
+}
+
+void EmulatedCamera::enableMsgType(int32_t msg_type)
+{
+    mCallbackNotifier.enableMessage(msg_type);
+}
+
+void EmulatedCamera::disableMsgType(int32_t msg_type)
+{
+    mCallbackNotifier.disableMessage(msg_type);
+}
+
+int EmulatedCamera::isMsgTypeEnabled(int32_t msg_type)
+{
+    return mCallbackNotifier.isMessageEnabled(msg_type);
+}
+
+status_t EmulatedCamera::startPreview()
+{
+    /* Callback should return a negative errno. */
+    return -doStartPreview();
+}
+
+void EmulatedCamera::stopPreview()
+{
+    doStopPreview();
+}
+
+int EmulatedCamera::isPreviewEnabled()
+{
+    return mPreviewWindow.isPreviewEnabled();
+}
+
+status_t EmulatedCamera::storeMetaDataInBuffers(int enable)
+{
+    /* Callback should return a negative errno. */
+    return -mCallbackNotifier.storeMetaDataInBuffers(enable);
+}
+
+status_t EmulatedCamera::startRecording()
+{
+    /* Callback should return a negative errno. */
+    return -mCallbackNotifier.enableVideoRecording(mParameters.getPreviewFrameRate());
+}
+
+void EmulatedCamera::stopRecording()
+{
+    mCallbackNotifier.disableVideoRecording();
+}
+
+int EmulatedCamera::isRecordingEnabled()
+{
+    return mCallbackNotifier.isVideoRecordingEnabled();
+}
+
+void EmulatedCamera::releaseRecordingFrame(const void* opaque)
+{
+    mCallbackNotifier.releaseRecordingFrame(opaque);
+}
+
+status_t EmulatedCamera::setAutoFocus()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    /* TODO: Future enhancements. */
+    return NO_ERROR;
+}
+
+status_t EmulatedCamera::cancelAutoFocus()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    /* TODO: Future enhancements. */
+    return NO_ERROR;
+}
+
+status_t EmulatedCamera::takePicture()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    status_t res;
+    int width, height;
+    uint32_t org_fmt;
+
+    /* Collect frame info for the picture. */
+    mParameters.getPictureSize(&width, &height);
+    const char* pix_fmt = mParameters.getPictureFormat();
+    if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_YUV420P) == 0) {
+        org_fmt = V4L2_PIX_FMT_YUV420;
+    } else if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_RGBA8888) == 0) {
+        org_fmt = V4L2_PIX_FMT_RGB32;
+    } else if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
+        org_fmt = V4L2_PIX_FMT_NV21;
+    } else if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_JPEG) == 0) {
+        /* We only have JPEG converted for NV21 format. */
+        org_fmt = V4L2_PIX_FMT_NV21;
+    } else {
+        ALOGE("%s: Unsupported pixel format %s", __FUNCTION__, pix_fmt);
+        return EINVAL;
+    }
+    /* Get JPEG quality. */
+    int jpeg_quality = mParameters.getInt(CameraParameters::KEY_JPEG_QUALITY);
+    if (jpeg_quality <= 0) {
+        jpeg_quality = 90;  /* Fall back to default. */
+    }
+
+    /*
+     * Make sure preview is not running, and device is stopped before taking
+     * picture.
+     */
+
+    const bool preview_on = mPreviewWindow.isPreviewEnabled();
+    if (preview_on) {
+        doStopPreview();
+    }
+
+    /* Camera device should have been stopped when the shutter message has been
+     * enabled. */
+    EmulatedCameraDevice* const camera_dev = getCameraDevice();
+    if (camera_dev->isStarted()) {
+        ALOGW("%s: Camera device is started", __FUNCTION__);
+        camera_dev->stopDeliveringFrames();
+        camera_dev->stopDevice();
+    }
+
+    /*
+     * Take the picture now.
+     */
+
+    /* Start camera device for the picture frame. */
+    ALOGD("Starting camera for picture: %.4s(%s)[%dx%d]",
+         reinterpret_cast<const char*>(&org_fmt), pix_fmt, width, height);
+    res = camera_dev->startDevice(width, height, org_fmt);
+    if (res != NO_ERROR) {
+        if (preview_on) {
+            doStartPreview();
+        }
+        return res;
+    }
+
+    /* Deliver one frame only. */
+    mCallbackNotifier.setJpegQuality(jpeg_quality);
+    mCallbackNotifier.setTakingPicture(true);
+    res = camera_dev->startDeliveringFrames(true);
+    if (res != NO_ERROR) {
+        mCallbackNotifier.setTakingPicture(false);
+        if (preview_on) {
+            doStartPreview();
+        }
+    }
+    return res;
+}
+
+status_t EmulatedCamera::cancelPicture()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    return NO_ERROR;
+}
+
+status_t EmulatedCamera::setParameters(const char* parms)
+{
+    ALOGV("%s", __FUNCTION__);
+    PrintParamDiff(mParameters, parms);
+
+    CameraParameters new_param;
+    String8 str8_param(parms);
+    new_param.unflatten(str8_param);
+
+    /*
+     * Check for new exposure compensation parameter.
+     */
+    int new_exposure_compensation = new_param.getInt(
+            CameraParameters::KEY_EXPOSURE_COMPENSATION);
+    const int min_exposure_compensation = new_param.getInt(
+            CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION);
+    const int max_exposure_compensation = new_param.getInt(
+            CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION);
+
+    // Checks if the exposure compensation change is supported.
+    if ((min_exposure_compensation != 0) || (max_exposure_compensation != 0)) {
+        if (new_exposure_compensation > max_exposure_compensation) {
+            new_exposure_compensation = max_exposure_compensation;
+        }
+        if (new_exposure_compensation < min_exposure_compensation) {
+            new_exposure_compensation = min_exposure_compensation;
+        }
+
+        const int current_exposure_compensation = mParameters.getInt(
+                CameraParameters::KEY_EXPOSURE_COMPENSATION);
+        if (current_exposure_compensation != new_exposure_compensation) {
+            const float exposure_value = new_exposure_compensation *
+                    new_param.getFloat(
+                            CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP);
+
+            getCameraDevice()->setExposureCompensation(
+                    exposure_value);
+        }
+    }
+
+    const char* new_white_balance = new_param.get(
+            CameraParameters::KEY_WHITE_BALANCE);
+    const char* supported_white_balance = new_param.get(
+            CameraParameters::KEY_SUPPORTED_WHITE_BALANCE);
+
+    if ((supported_white_balance != NULL) && (new_white_balance != NULL) &&
+        (strstr(supported_white_balance, new_white_balance) != NULL)) {
+
+        const char* current_white_balance = mParameters.get(
+                CameraParameters::KEY_WHITE_BALANCE);
+        if ((current_white_balance == NULL) ||
+            (strcmp(current_white_balance, new_white_balance) != 0)) {
+            ALOGV("Setting white balance to %s", new_white_balance);
+            getCameraDevice()->setWhiteBalanceMode(new_white_balance);
+        }
+    }
+
+    mParameters = new_param;
+
+    return NO_ERROR;
+}
+
+/* A dumb variable indicating "no params" / error on the exit from
+ * EmulatedCamera::getParameters(). */
+static char lNoParam = '\0';
+char* EmulatedCamera::getParameters()
+{
+    String8 params(mParameters.flatten());
+    char* ret_str =
+        reinterpret_cast<char*>(malloc(sizeof(char) * (params.length()+1)));
+    memset(ret_str, 0, params.length()+1);
+    if (ret_str != NULL) {
+        strncpy(ret_str, params.string(), params.length()+1);
+        return ret_str;
+    } else {
+        ALOGE("%s: Unable to allocate string for %s", __FUNCTION__, params.string());
+        /* Apparently, we can't return NULL fron this routine. */
+        return &lNoParam;
+    }
+}
+
+void EmulatedCamera::putParameters(char* params)
+{
+    /* This method simply frees parameters allocated in getParameters(). */
+    if (params != NULL && params != &lNoParam) {
+        free(params);
+    }
+}
+
+status_t EmulatedCamera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
+{
+    ALOGV("%s: cmd = %d, arg1 = %d, arg2 = %d", __FUNCTION__, cmd, arg1, arg2);
+
+    /* TODO: Future enhancements. */
+    return 0;
+}
+
+void EmulatedCamera::releaseCamera()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    cleanupCamera();
+}
+
+status_t EmulatedCamera::dumpCamera(int fd)
+{
+    ALOGV("%s", __FUNCTION__);
+
+    /* TODO: Future enhancements. */
+    return -EINVAL;
+}
+
+/****************************************************************************
+ * Preview management.
+ ***************************************************************************/
+
+status_t EmulatedCamera::doStartPreview()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    EmulatedCameraDevice* camera_dev = getCameraDevice();
+    if (camera_dev->isStarted()) {
+        camera_dev->stopDeliveringFrames();
+        camera_dev->stopDevice();
+    }
+
+    status_t res = mPreviewWindow.startPreview();
+    if (res != NO_ERROR) {
+        return res;
+    }
+
+    /* Make sure camera device is connected. */
+    if (!camera_dev->isConnected()) {
+        res = camera_dev->connectDevice();
+        if (res != NO_ERROR) {
+            mPreviewWindow.stopPreview();
+            return res;
+        }
+    }
+
+    int width, height;
+    /* Lets see what should we use for frame width, and height. */
+    if (mParameters.get(CameraParameters::KEY_VIDEO_SIZE) != NULL) {
+        mParameters.getVideoSize(&width, &height);
+    } else {
+        mParameters.getPreviewSize(&width, &height);
+    }
+    /* Lets see what should we use for the frame pixel format. Note that there
+     * are two parameters that define pixel formats for frames sent to the
+     * application via notification callbacks:
+     * - KEY_VIDEO_FRAME_FORMAT, that is used when recording video, and
+     * - KEY_PREVIEW_FORMAT, that is used for preview frame notification.
+     * We choose one or the other, depending on "recording-hint" property set by
+     * the framework that indicating intention: video, or preview. */
+    const char* pix_fmt = NULL;
+    const char* is_video = mParameters.get(EmulatedCamera::RECORDING_HINT_KEY);
+    if (is_video == NULL) {
+        is_video = CameraParameters::FALSE;
+    }
+    if (strcmp(is_video, CameraParameters::TRUE) == 0) {
+        /* Video recording is requested. Lets see if video frame format is set. */
+        pix_fmt = mParameters.get(CameraParameters::KEY_VIDEO_FRAME_FORMAT);
+    }
+    /* If this was not video recording, or video frame format is not set, lets
+     * use preview pixel format for the main framebuffer. */
+    if (pix_fmt == NULL) {
+        pix_fmt = mParameters.getPreviewFormat();
+    }
+    if (pix_fmt == NULL) {
+        ALOGE("%s: Unable to obtain video format", __FUNCTION__);
+        mPreviewWindow.stopPreview();
+        return EINVAL;
+    }
+
+    /* Convert framework's pixel format to the FOURCC one. */
+    uint32_t org_fmt;
+    if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_YUV420P) == 0) {
+        org_fmt = V4L2_PIX_FMT_YUV420;
+    } else if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_RGBA8888) == 0) {
+        org_fmt = V4L2_PIX_FMT_RGB32;
+    } else if (strcmp(pix_fmt, CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
+        org_fmt = V4L2_PIX_FMT_NV21;
+    } else {
+        ALOGE("%s: Unsupported pixel format %s", __FUNCTION__, pix_fmt);
+        mPreviewWindow.stopPreview();
+        return EINVAL;
+    }
+    ALOGD("Starting camera: %dx%d -> %.4s(%s)",
+         width, height, reinterpret_cast<const char*>(&org_fmt), pix_fmt);
+    res = camera_dev->startDevice(width, height, org_fmt);
+    if (res != NO_ERROR) {
+        mPreviewWindow.stopPreview();
+        return res;
+    }
+
+    res = camera_dev->startDeliveringFrames(false);
+    if (res != NO_ERROR) {
+        camera_dev->stopDevice();
+        mPreviewWindow.stopPreview();
+    }
+
+    return res;
+}
+
+status_t EmulatedCamera::doStopPreview()
+{
+    ALOGV("%s", __FUNCTION__);
+
+    status_t res = NO_ERROR;
+    if (mPreviewWindow.isPreviewEnabled()) {
+        /* Stop the camera. */
+        if (getCameraDevice()->isStarted()) {
+            getCameraDevice()->stopDeliveringFrames();
+            res = getCameraDevice()->stopDevice();
+        }
+
+        if (res == NO_ERROR) {
+            /* Disable preview as well. */
+            mPreviewWindow.stopPreview();
+        }
+    }
+
+    return NO_ERROR;
+}
+
+/****************************************************************************
+ * Private API.
+ ***************************************************************************/
+
+status_t EmulatedCamera::cleanupCamera()
+{
+    status_t res = NO_ERROR;
+
+    /* If preview is running - stop it. */
+    res = doStopPreview();
+    if (res != NO_ERROR) {
+        return -res;
+    }
+
+    /* Stop and disconnect the camera device. */
+    EmulatedCameraDevice* const camera_dev = getCameraDevice();
+    if (camera_dev != NULL) {
+        if (camera_dev->isStarted()) {
+            camera_dev->stopDeliveringFrames();
+            res = camera_dev->stopDevice();
+            if (res != NO_ERROR) {
+                return -res;
+            }
+        }
+        if (camera_dev->isConnected()) {
+            res = camera_dev->disconnectDevice();
+            if (res != NO_ERROR) {
+                return -res;
+            }
+        }
+    }
+
+    mCallbackNotifier.cleanupCBNotifier();
+
+    return NO_ERROR;
+}
+
+/****************************************************************************
+ * Camera API callbacks as defined by camera_device_ops structure.
+ *
+ * Callbacks here simply dispatch the calls to an appropriate method inside
+ * EmulatedCamera instance, defined by the 'dev' parameter.
+ ***************************************************************************/
+
+int EmulatedCamera::set_preview_window(struct camera_device* dev,
+                                       struct preview_stream_ops* window)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->setPreviewWindow(window);
+}
+
+void EmulatedCamera::set_callbacks(
+        struct camera_device* dev,
+        camera_notify_callback notify_cb,
+        camera_data_callback data_cb,
+        camera_data_timestamp_callback data_cb_timestamp,
+        camera_request_memory get_memory,
+        void* user)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->setCallbacks(notify_cb, data_cb, data_cb_timestamp, get_memory, user);
+}
+
+void EmulatedCamera::enable_msg_type(struct camera_device* dev, int32_t msg_type)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->enableMsgType(msg_type);
+}
+
+void EmulatedCamera::disable_msg_type(struct camera_device* dev, int32_t msg_type)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->disableMsgType(msg_type);
+}
+
+int EmulatedCamera::msg_type_enabled(struct camera_device* dev, int32_t msg_type)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->isMsgTypeEnabled(msg_type);
+}
+
+int EmulatedCamera::start_preview(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->startPreview();
+}
+
+void EmulatedCamera::stop_preview(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->stopPreview();
+}
+
+int EmulatedCamera::preview_enabled(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->isPreviewEnabled();
+}
+
+int EmulatedCamera::store_meta_data_in_buffers(struct camera_device* dev,
+                                               int enable)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->storeMetaDataInBuffers(enable);
+}
+
+int EmulatedCamera::start_recording(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->startRecording();
+}
+
+void EmulatedCamera::stop_recording(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->stopRecording();
+}
+
+int EmulatedCamera::recording_enabled(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->isRecordingEnabled();
+}
+
+void EmulatedCamera::release_recording_frame(struct camera_device* dev,
+                                             const void* opaque)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->releaseRecordingFrame(opaque);
+}
+
+int EmulatedCamera::auto_focus(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->setAutoFocus();
+}
+
+int EmulatedCamera::cancel_auto_focus(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->cancelAutoFocus();
+}
+
+int EmulatedCamera::take_picture(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->takePicture();
+}
+
+int EmulatedCamera::cancel_picture(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->cancelPicture();
+}
+
+int EmulatedCamera::set_parameters(struct camera_device* dev, const char* parms)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->setParameters(parms);
+}
+
+char* EmulatedCamera::get_parameters(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return NULL;
+    }
+    return ec->getParameters();
+}
+
+void EmulatedCamera::put_parameters(struct camera_device* dev, char* params)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->putParameters(params);
+}
+
+int EmulatedCamera::send_command(struct camera_device* dev,
+                                 int32_t cmd,
+                                 int32_t arg1,
+                                 int32_t arg2)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->sendCommand(cmd, arg1, arg2);
+}
+
+void EmulatedCamera::release(struct camera_device* dev)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return;
+    }
+    ec->releaseCamera();
+}
+
+int EmulatedCamera::dump(struct camera_device* dev, int fd)
+{
+    EmulatedCamera* ec = reinterpret_cast<EmulatedCamera*>(dev->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->dumpCamera(fd);
+}
+
+int EmulatedCamera::close(struct hw_device_t* device)
+{
+    EmulatedCamera* ec =
+        reinterpret_cast<EmulatedCamera*>(reinterpret_cast<struct camera_device*>(device)->priv);
+    if (ec == NULL) {
+        ALOGE("%s: Unexpected NULL camera device", __FUNCTION__);
+        return -EINVAL;
+    }
+    return ec->closeCamera();
+}
+
+/****************************************************************************
+ * Static initializer for the camera callback API
+ ****************************************************************************/
+
+camera_device_ops_t EmulatedCamera::mDeviceOps = {
+    EmulatedCamera::set_preview_window,
+    EmulatedCamera::set_callbacks,
+    EmulatedCamera::enable_msg_type,
+    EmulatedCamera::disable_msg_type,
+    EmulatedCamera::msg_type_enabled,
+    EmulatedCamera::start_preview,
+    EmulatedCamera::stop_preview,
+    EmulatedCamera::preview_enabled,
+    EmulatedCamera::store_meta_data_in_buffers,
+    EmulatedCamera::start_recording,
+    EmulatedCamera::stop_recording,
+    EmulatedCamera::recording_enabled,
+    EmulatedCamera::release_recording_frame,
+    EmulatedCamera::auto_focus,
+    EmulatedCamera::cancel_auto_focus,
+    EmulatedCamera::take_picture,
+    EmulatedCamera::cancel_picture,
+    EmulatedCamera::set_parameters,
+    EmulatedCamera::get_parameters,
+    EmulatedCamera::put_parameters,
+    EmulatedCamera::send_command,
+    EmulatedCamera::release,
+    EmulatedCamera::dump
+};
+
+/****************************************************************************
+ * Common keys
+ ***************************************************************************/
+
+const char EmulatedCamera::FACING_KEY[]         = "prop-facing";
+const char EmulatedCamera::ORIENTATION_KEY[]    = "prop-orientation";
+const char EmulatedCamera::RECORDING_HINT_KEY[] = "recording-hint";
+
+/****************************************************************************
+ * Common string values
+ ***************************************************************************/
+
+const char EmulatedCamera::FACING_BACK[]      = "back";
+const char EmulatedCamera::FACING_FRONT[]     = "front";
+
+/****************************************************************************
+ * Helper routines
+ ***************************************************************************/
+
+static char* AddValue(const char* param, const char* val)
+{
+    const size_t len1 = strlen(param);
+    const size_t len2 = strlen(val);
+    char* ret = reinterpret_cast<char*>(malloc(len1 + len2 + 2));
+    ALOGE_IF(ret == NULL, "%s: Memory failure", __FUNCTION__);
+    if (ret != NULL) {
+        memcpy(ret, param, len1);
+        ret[len1] = ',';
+        memcpy(ret + len1 + 1, val, len2);
+        ret[len1 + len2 + 1] = '\0';
+    }
+    return ret;
+}
+
+/****************************************************************************
+ * Parameter debugging helpers
+ ***************************************************************************/
+
+#if DEBUG_PARAM
+static void PrintParamDiff(const CameraParameters& current,
+                            const char* new_par)
+{
+    char tmp[2048];
+    const char* wrk = new_par;
+
+    /* Divided with ';' */
+    const char* next = strchr(wrk, ';');
+    while (next != NULL) {
+        snprintf(tmp, sizeof(tmp), "%.*s", (int)(intptr_t)(next-wrk), wrk);
+        /* in the form key=value */
+        char* val = strchr(tmp, '=');
+        if (val != NULL) {
+            *val = '\0'; val++;
+            const char* in_current = current.get(tmp);
+            if (in_current != NULL) {
+                if (strcmp(in_current, val)) {
+                    ALOGD("=== Value changed: %s: %s -> %s", tmp, in_current, val);
+                }
+            } else {
+                ALOGD("+++ New parameter: %s=%s", tmp, val);
+            }
+        } else {
+            ALOGW("No value separator in %s", tmp);
+        }
+        wrk = next + 1;
+        next = strchr(wrk, ';');
+    }
+}
+#endif  /* DEBUG_PARAM */
+
+}; /* namespace android */