299 lines
11 KiB
C
299 lines
11 KiB
C
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SYSTEM_CORE_INCLUDE_ANDROID_CAMERA_H
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#define SYSTEM_CORE_INCLUDE_ANDROID_CAMERA_H
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <cutils/native_handle.h>
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#include <hardware/hardware.h>
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#include <hardware/gralloc.h>
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__BEGIN_DECLS
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/**
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* A set of bit masks for specifying how the received preview frames are
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* handled before the previewCallback() call.
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*
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* The least significant 3 bits of an "int" value are used for this purpose:
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*
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* ..... 0 0 0
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* ^ ^ ^
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* | | |---------> determine whether the callback is enabled or not
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* | |-----------> determine whether the callback is one-shot or not
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* |-------------> determine whether the frame is copied out or not
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*
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* WARNING: When a frame is sent directly without copying, it is the frame
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* receiver's responsiblity to make sure that the frame data won't get
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* corrupted by subsequent preview frames filled by the camera. This flag is
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* recommended only when copying out data brings significant performance price
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* and the handling/processing of the received frame data is always faster than
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* the preview frame rate so that data corruption won't occur.
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*
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* For instance,
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* 1. 0x00 disables the callback. In this case, copy out and one shot bits
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* are ignored.
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* 2. 0x01 enables a callback without copying out the received frames. A
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* typical use case is the Camcorder application to avoid making costly
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* frame copies.
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* 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical
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* use case is the Camera application.
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* 4. 0x07 is enabling a callback with frame copied out only once. A typical
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* use case is the Barcode scanner application.
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*/
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enum {
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CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK = 0x01,
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CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK = 0x02,
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CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK = 0x04,
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/** Typical use cases */
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CAMERA_FRAME_CALLBACK_FLAG_NOOP = 0x00,
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CAMERA_FRAME_CALLBACK_FLAG_CAMCORDER = 0x01,
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CAMERA_FRAME_CALLBACK_FLAG_CAMERA = 0x05,
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CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER = 0x07
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};
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/** msgType in notifyCallback and dataCallback functions */
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enum {
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CAMERA_MSG_ERROR = 0x0001, // notifyCallback
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CAMERA_MSG_SHUTTER = 0x0002, // notifyCallback
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CAMERA_MSG_FOCUS = 0x0004, // notifyCallback
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CAMERA_MSG_ZOOM = 0x0008, // notifyCallback
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CAMERA_MSG_PREVIEW_FRAME = 0x0010, // dataCallback
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CAMERA_MSG_VIDEO_FRAME = 0x0020, // data_timestamp_callback
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CAMERA_MSG_POSTVIEW_FRAME = 0x0040, // dataCallback
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CAMERA_MSG_RAW_IMAGE = 0x0080, // dataCallback
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CAMERA_MSG_COMPRESSED_IMAGE = 0x0100, // dataCallback
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CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x0200, // dataCallback
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// Preview frame metadata. This can be combined with
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// CAMERA_MSG_PREVIEW_FRAME in dataCallback. For example, the apps can
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// request FRAME and METADATA. Or the apps can request only FRAME or only
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// METADATA.
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CAMERA_MSG_PREVIEW_METADATA = 0x0400, // dataCallback
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// Notify on autofocus start and stop. This is useful in continuous
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// autofocus - FOCUS_MODE_CONTINUOUS_VIDEO and FOCUS_MODE_CONTINUOUS_PICTURE.
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CAMERA_MSG_FOCUS_MOVE = 0x0800, // notifyCallback
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CAMERA_MSG_ALL_MSGS = 0xFFFF
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};
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/** cmdType in sendCommand functions */
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enum {
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CAMERA_CMD_START_SMOOTH_ZOOM = 1,
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CAMERA_CMD_STOP_SMOOTH_ZOOM = 2,
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/**
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* Set the clockwise rotation of preview display (setPreviewDisplay) in
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* degrees. This affects the preview frames and the picture displayed after
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* snapshot. This method is useful for portrait mode applications. Note
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* that preview display of front-facing cameras is flipped horizontally
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* before the rotation, that is, the image is reflected along the central
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* vertical axis of the camera sensor. So the users can see themselves as
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* looking into a mirror.
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*
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* This does not affect the order of byte array of
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* CAMERA_MSG_PREVIEW_FRAME, CAMERA_MSG_VIDEO_FRAME,
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* CAMERA_MSG_POSTVIEW_FRAME, CAMERA_MSG_RAW_IMAGE, or
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* CAMERA_MSG_COMPRESSED_IMAGE. This is allowed to be set during preview
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* since API level 14.
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*/
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CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3,
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/**
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* cmdType to disable/enable shutter sound. In sendCommand passing arg1 =
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* 0 will disable, while passing arg1 = 1 will enable the shutter sound.
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*/
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CAMERA_CMD_ENABLE_SHUTTER_SOUND = 4,
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/* cmdType to play recording sound */
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CAMERA_CMD_PLAY_RECORDING_SOUND = 5,
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/**
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* Start the face detection. This should be called after preview is started.
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* The camera will notify the listener of CAMERA_MSG_FACE and the detected
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* faces in the preview frame. The detected faces may be the same as the
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* previous ones. Apps should call CAMERA_CMD_STOP_FACE_DETECTION to stop
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* the face detection. This method is supported if CameraParameters
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* KEY_MAX_NUM_HW_DETECTED_FACES or KEY_MAX_NUM_SW_DETECTED_FACES is
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* bigger than 0. Hardware and software face detection should not be running
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* at the same time. If the face detection has started, apps should not send
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* this again.
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*
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* In hardware face detection mode, CameraParameters KEY_WHITE_BALANCE,
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* KEY_FOCUS_AREAS and KEY_METERING_AREAS have no effect.
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*
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* arg1 is the face detection type. It can be CAMERA_FACE_DETECTION_HW or
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* CAMERA_FACE_DETECTION_SW. If the type of face detection requested is not
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* supported, the HAL must return BAD_VALUE.
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*/
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CAMERA_CMD_START_FACE_DETECTION = 6,
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/**
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* Stop the face detection.
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*/
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CAMERA_CMD_STOP_FACE_DETECTION = 7,
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/**
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* Enable/disable focus move callback (CAMERA_MSG_FOCUS_MOVE). Passing
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* arg1 = 0 will disable, while passing arg1 = 1 will enable the callback.
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*/
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CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG = 8,
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/**
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* Ping camera service to see if camera hardware is released.
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*
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* When any camera method returns error, the client can use ping command
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* to see if the camera has been taken away by other clients. If the result
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* is NO_ERROR, it means the camera hardware is not released. If the result
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* is not NO_ERROR, the camera has been released and the existing client
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* can silently finish itself or show a dialog.
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*/
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CAMERA_CMD_PING = 9,
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/**
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* Configure the number of video buffers used for recording. The intended
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* video buffer count for recording is passed as arg1, which must be
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* greater than 0. This command must be sent before recording is started.
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* This command returns INVALID_OPERATION error if it is sent after video
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* recording is started, or the command is not supported at all. This
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* command also returns a BAD_VALUE error if the intended video buffer
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* count is non-positive or too big to be realized.
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*/
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CAMERA_CMD_SET_VIDEO_BUFFER_COUNT = 10,
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/**
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* Configure an explicit format to use for video recording metadata mode.
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* This can be used to switch the format from the
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* default IMPLEMENTATION_DEFINED gralloc format to some other
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* device-supported format, and the default dataspace from the BT_709 color
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* space to some other device-supported dataspace. arg1 is the HAL pixel
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* format, and arg2 is the HAL dataSpace. This command returns
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* INVALID_OPERATION error if it is sent after video recording is started,
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* or the command is not supported at all.
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*
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* If the gralloc format is set to a format other than
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* IMPLEMENTATION_DEFINED, then HALv3 devices will use gralloc usage flags
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* of SW_READ_OFTEN.
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*/
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CAMERA_CMD_SET_VIDEO_FORMAT = 11
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};
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/** camera fatal errors */
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enum {
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CAMERA_ERROR_UNKNOWN = 1,
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/**
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* Camera was released because another client has connected to the camera.
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* The original client should call Camera::disconnect immediately after
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* getting this notification. Otherwise, the camera will be released by
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* camera service in a short time. The client should not call any method
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* (except disconnect and sending CAMERA_CMD_PING) after getting this.
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*/
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CAMERA_ERROR_RELEASED = 2,
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CAMERA_ERROR_SERVER_DIED = 100
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};
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enum {
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/** The facing of the camera is opposite to that of the screen. */
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CAMERA_FACING_BACK = 0,
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/** The facing of the camera is the same as that of the screen. */
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CAMERA_FACING_FRONT = 1,
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/**
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* The facing of the camera is not fixed relative to the screen.
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* The cameras with this facing are external cameras, e.g. USB cameras.
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*/
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CAMERA_FACING_EXTERNAL = 2
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};
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enum {
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/** Hardware face detection. It does not use much CPU. */
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CAMERA_FACE_DETECTION_HW = 0,
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/**
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* Software face detection. It uses some CPU. Applications must use
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* Camera.setPreviewTexture for preview in this mode.
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*/
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CAMERA_FACE_DETECTION_SW = 1
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};
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/**
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* The information of a face from camera face detection.
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*/
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typedef struct camera_face {
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/**
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* Bounds of the face [left, top, right, bottom]. (-1000, -1000) represents
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* the top-left of the camera field of view, and (1000, 1000) represents the
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* bottom-right of the field of view. The width and height cannot be 0 or
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* negative. This is supported by both hardware and software face detection.
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*
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* The direction is relative to the sensor orientation, that is, what the
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* sensor sees. The direction is not affected by the rotation or mirroring
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* of CAMERA_CMD_SET_DISPLAY_ORIENTATION.
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*/
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int32_t rect[4];
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/**
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* The confidence level of the face. The range is 1 to 100. 100 is the
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* highest confidence. This is supported by both hardware and software
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* face detection.
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*/
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int32_t score;
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/**
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* An unique id per face while the face is visible to the tracker. If
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* the face leaves the field-of-view and comes back, it will get a new
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* id. If the value is 0, id is not supported.
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*/
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int32_t id;
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/**
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* The coordinates of the center of the left eye. The range is -1000 to
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* 1000. -2000, -2000 if this is not supported.
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*/
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int32_t left_eye[2];
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/**
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* The coordinates of the center of the right eye. The range is -1000 to
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* 1000. -2000, -2000 if this is not supported.
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*/
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int32_t right_eye[2];
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/**
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* The coordinates of the center of the mouth. The range is -1000 to 1000.
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* -2000, -2000 if this is not supported.
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*/
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int32_t mouth[2];
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} camera_face_t;
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/**
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* The metadata of the frame data.
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*/
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typedef struct camera_frame_metadata {
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/**
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* The number of detected faces in the frame.
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*/
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int32_t number_of_faces;
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/**
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* An array of the detected faces. The length is number_of_faces.
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*/
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camera_face_t *faces;
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} camera_frame_metadata_t;
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__END_DECLS
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#endif /* SYSTEM_CORE_INCLUDE_ANDROID_CAMERA_H */
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