// stop preview mode
void CameraClient::stopPreview() {
    LOG1("stopPreview (pid %d)", getCallingPid());
#ifdef QCOM_HARDWARE
    disableMsgType(CAMERA_MSG_PREVIEW_METADATA);
#endif
    Mutex::Autolock lock(mLock);
    if (checkPidAndHardware() != NO_ERROR) return;

#ifdef OMAP_ENHANCEMENT
    // According to framework documentation, preview needs
    // to be started for image capture. This will make sure
    // that image capture related messages get disabled if
    // not done already in their respective handlers.
    // If these messages come when in the midddle of
    // stopping preview we will deadlock the system in
    // lockIfMessageWanted().
    disableMsgType(CAMERA_MSG_POSTVIEW_FRAME);
#endif

    disableMsgType(CAMERA_MSG_PREVIEW_FRAME);
#ifdef QCOM_HARDWARE
    //Disable picture related message types
    ALOGI("stopPreview: Disable picture related messages");
    int picMsgType = 0;
    picMsgType = (CAMERA_MSG_SHUTTER |
                  CAMERA_MSG_POSTVIEW_FRAME |
                  CAMERA_MSG_RAW_IMAGE |
                  CAMERA_MSG_RAW_IMAGE_NOTIFY |
                  CAMERA_MSG_COMPRESSED_IMAGE);
    disableMsgType(picMsgType);
#endif
    mHardware->stopPreview();

    mPreviewBuffer.clear();
}

// enable shutter sound
status_t CameraService::Client::enableShutterSound(bool enable) {
    LOG1("enableShutterSound (pid %d)", getCallingPid());

    status_t result = checkPidAndHardware();
    if (result != NO_ERROR) return result;

    if (enable) {
        mPlayShutterSound = true;
        return OK;
    }

    // Disabling shutter sound may not be allowed. In that case only
    // allow the mediaserver process to disable the sound.
    char value[PROPERTY_VALUE_MAX];
    property_get("ro.camera.sound.forced", value, "0");
    if (strcmp(value, "0") != 0) {
        // Disabling shutter sound is not allowed. Deny if the current
        // process is not mediaserver.
        if (getCallingPid() != getpid()) {
            LOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid());
            return PERMISSION_DENIED;
        }
    }

    mPlayShutterSound = false;
    return OK;
}

// take a picture - image is returned in callback
status_t CameraService::Client::takePicture(int msgType) {
    char prop[PROPERTY_VALUE_MAX];
    LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType);

    Mutex::Autolock lock(mLock);
    status_t result = checkPidAndHardware();
    if (result != NO_ERROR) return result;
	//zxj ++
	mstopPreview = true;
	//zxj --
    if ((msgType & CAMERA_MSG_RAW_IMAGE) &&
        (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) {
        LOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY"
                " cannot be both enabled");
        return BAD_VALUE;
    }

    // We only accept picture related message types
    // and ignore other types of messages for takePicture().
    int picMsgType = msgType
                        & (CAMERA_MSG_SHUTTER |
                           CAMERA_MSG_POSTVIEW_FRAME |
                           CAMERA_MSG_RAW_IMAGE |
                           CAMERA_MSG_RAW_IMAGE_NOTIFY |
                           CAMERA_MSG_COMPRESSED_IMAGE);
    disableMsgType(CAMERA_MSG_PREVIEW_METADATA);
    enableMsgType(picMsgType);
    mburstCnt = mHardware->getParameters().getInt("num-snaps-per-shutter");
    if(mburstCnt <= 0) mburstCnt = 1;
    LOG1("mburstCnt = %d", mburstCnt);
    return mHardware->takePicture();
}

		status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) {
			LOG1("sendCommand (pid %d)", getCallingPid());
			int orientation;
			Mutex::Autolock lock(mLock);
			status_t result = checkPidAndHardware();
			if (result != NO_ERROR) return result;
			
			if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) {
				// The orientation cannot be set during preview.
				if (mHardware->previewEnabled()) {
					return INVALID_OPERATION;
				}
				// Mirror the preview if the camera is front-facing.
				orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT);
				if (orientation == -1) return BAD_VALUE;
				
				if (mOrientation != orientation) {
					mOrientation = orientation;
					if (mOverlayRef != 0) mOrientationChanged = true;
				}
				return OK;
			}
			
			return mHardware->sendCommand(cmd, arg1, arg2);
		}

// get preview/capture parameters - key/value pairs
String8 CameraService::Client::getParameters() const {
    Mutex::Autolock lock(mLock);
    if (checkPidAndHardware() != NO_ERROR) return String8();

    String8 params(mHardware->getParameters().flatten());
    LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string());
    return params;
}

status_t CameraClient::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) {
    LOG1("sendCommand (pid %d)", getCallingPid());
    int orientation;
    Mutex::Autolock lock(mLock);
    status_t result = checkPidAndHardware();
    if (result != NO_ERROR) return result;

    if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) {
        // Mirror the preview if the camera is front-facing.
        orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT);
        if (orientation == -1) return BAD_VALUE;

        if (mOrientation != orientation) {
            mOrientation = orientation;
            if (mPreviewWindow != 0) {
                native_window_set_buffers_transform(mPreviewWindow.get(),
                        mOrientation);
            }
        }
        return OK;
    } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) {
        switch (arg1) {
            case 0:
                return enableShutterSound(false);
            case 1:
                return enableShutterSound(true);
            default:
                return BAD_VALUE;
        }
        return OK;
    } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) {
        mCameraService->playSound(CameraService::SOUND_RECORDING);
    } else if (cmd == CAMERA_CMD_SET_VIDEO_BUFFER_COUNT) {
        // Silently ignore this command
        return INVALID_OPERATION;
    } else if (cmd == CAMERA_CMD_PING) {
        // If mHardware is 0, checkPidAndHardware will return error.
        return OK;
#ifdef QCOM_HARDWARE
    } else if (cmd == CAMERA_CMD_HISTOGRAM_ON) {
        enableMsgType(CAMERA_MSG_STATS_DATA);
    } else if (cmd == CAMERA_CMD_HISTOGRAM_OFF) {
        disableMsgType(CAMERA_MSG_STATS_DATA);
    } else if (cmd == CAMERA_CMD_METADATA_ON) {
        enableMsgType(CAMERA_MSG_META_DATA);
    } else if (cmd == CAMERA_CMD_METADATA_OFF) {
        disableMsgType(CAMERA_MSG_META_DATA);
    } else if ( cmd == CAMERA_CMD_LONGSHOT_ON ) {
        mLongshotEnabled = true;
    } else if ( cmd == CAMERA_CMD_LONGSHOT_OFF ) {
        mLongshotEnabled = false;
        disableMsgType(CAMERA_MSG_SHUTTER);
        disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE);
#endif
    }

    return mHardware->sendCommand(cmd, arg1, arg2);
}

// get preview/capture parameters - key/value pairs
String8 CameraClient::getParameters() const {
    Mutex::Autolock lock(mLock);
    // The camera service can unconditionally get the parameters at all times
    if (getCallingPid() != mServicePid && checkPidAndHardware() != NO_ERROR) return String8();

    String8 params(mHardware->getParameters().flatten());
    LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string());
    return params;
}

status_t CameraClient::setPreviewWindow(const sp<IBinder>& binder,
        const sp<ANativeWindow>& window) {
    Mutex::Autolock lock(mLock);
    status_t result = checkPidAndHardware();
    if (result != NO_ERROR) return result;

    // return if no change in surface.
    if (binder == mSurface) {
        return NO_ERROR;
    }

    if (window != 0) {
        result = native_window_api_connect(window.get(), NATIVE_WINDOW_API_CAMERA);
        if (result != NO_ERROR) {
            ALOGE("native_window_api_connect failed: %s (%d)", strerror(-result),
                    result);
            return result;
        }
    }

    // If preview has been already started, register preview buffers now.
    if (mHardware->previewEnabled()) {
        if (window != 0) {
            native_window_set_scaling_mode(window.get(),
                    NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW);
            native_window_set_buffers_transform(window.get(), mOrientation);
            result = mHardware->setPreviewWindow(window);
        }
#ifdef QCOM_HARDWARE
#ifndef NO_UPDATE_PREVIEW
    } else {
        if (window != 0) {
            native_window_set_buffers_transform(window.get(), mOrientation);
        }
        result = mHardware->setPreviewWindow(window);
#endif
#endif
    }

    if (result == NO_ERROR) {
        // Everything has succeeded.  Disconnect the old window and remember the
        // new window.
        disconnectWindow(mPreviewWindow);
        mSurface = binder;
        mPreviewWindow = window;
    } else {
        // Something went wrong after we connected to the new window, so
        // disconnect here.
        disconnectWindow(window);
    }

    return result;
}

status_t CameraClient::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) {
    LOG1("sendCommand (pid %d)", getCallingPid());
    int orientation;
    Mutex::Autolock lock(mLock);
    status_t result = checkPidAndHardware();
    if (result != NO_ERROR) return result;

    if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) {
//!++
        LOG1("CAMERA_CMD_SET_DISPLAY_ORIENTATION - tid(%d), (degrees, mirror)=(%d, %d)", ::gettid(), arg1, mCameraFacing);
//!--
        // Mirror the preview if the camera is front-facing.
        orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT);
        if (orientation == -1) return BAD_VALUE;

        if (mOrientation != orientation) {
            mOrientation = orientation;
            if (mPreviewWindow != 0) {
                native_window_set_buffers_transform(mPreviewWindow.get(),
                        mOrientation);
            }
        }
        return OK;
    } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) {
        switch (arg1) {
            case 0:
                return enableShutterSound(false);
            case 1:
                return enableShutterSound(true);
            default:
                return BAD_VALUE;
        }
        return OK;
    } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) {
        mCameraService->playSound(CameraService::SOUND_RECORDING);
    } else if (cmd == CAMERA_CMD_SET_VIDEO_BUFFER_COUNT) {
        // Silently ignore this command
        return INVALID_OPERATION;
    } else if (cmd == CAMERA_CMD_PING) {
        // If mHardware is 0, checkPidAndHardware will return error.
        return OK;
    }

    return mHardware->sendCommand(cmd, arg1, arg2);
}

// start preview or recording
status_t CameraClient::startCameraMode(camera_mode mode) {
    LOG1("startCameraMode(%d)", mode);
    status_t result = checkPidAndHardware();
    if (result != NO_ERROR) return result;

    switch(mode) {
        case CAMERA_PREVIEW_MODE:
            if (mSurface == 0 && mPreviewWindow == 0) {
                LOG1("mSurface is not set yet.");
                // still able to start preview in this case.
            }
            return startPreviewMode();
        case CAMERA_RECORDING_MODE:
            if (mSurface == 0 && mPreviewWindow == 0) {
                ALOGE("mSurface or mPreviewWindow must be set before startRecordingMode.");
                return INVALID_OPERATION;
            }
            return startRecordingMode();
        default:
            return UNKNOWN_ERROR;
    }
}