309 lines
11 KiB
C
309 lines
11 KiB
C
/*
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* Copyright (C) 2010-2011 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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// FIXME: add well-defined names for cameras
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#ifndef ANDROID_INCLUDE_CAMERA_H
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#define ANDROID_INCLUDE_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 <system/camera.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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* The id of this module
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*/
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#define CAMERA_HARDWARE_MODULE_ID "camera"
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struct camera_info {
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/**
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* The direction that the camera faces to. It should be CAMERA_FACING_BACK
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* or CAMERA_FACING_FRONT.
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*/
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int facing;
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/**
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* The orientation of the camera image. The value is the angle that the
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* camera image needs to be rotated clockwise so it shows correctly on the
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* display in its natural orientation. It should be 0, 90, 180, or 270.
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*
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* For example, suppose a device has a naturally tall screen. The
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* back-facing camera sensor is mounted in landscape. You are looking at
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* the screen. If the top side of the camera sensor is aligned with the
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* right edge of the screen in natural orientation, the value should be
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* 90. If the top side of a front-facing camera sensor is aligned with the
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* right of the screen, the value should be 270.
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*/
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int orientation;
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};
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typedef struct camera_module {
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hw_module_t common;
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int (*get_number_of_cameras)(void);
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int (*get_camera_info)(int camera_id, struct camera_info *info);
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} camera_module_t;
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struct camera_memory;
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typedef void (*camera_release_memory)(struct camera_memory *mem);
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typedef struct camera_memory {
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void *data;
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size_t size;
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void *handle;
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camera_release_memory release;
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} camera_memory_t;
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typedef camera_memory_t* (*camera_request_memory)(int fd, size_t buf_size, unsigned int num_bufs,
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void *user);
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typedef void (*camera_notify_callback)(int32_t msg_type,
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int32_t ext1,
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int32_t ext2,
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void *user);
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typedef void (*camera_data_callback)(int32_t msg_type,
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const camera_memory_t *data, unsigned int index,
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camera_frame_metadata_t *metadata, void *user);
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typedef void (*camera_data_timestamp_callback)(int64_t timestamp,
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int32_t msg_type,
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const camera_memory_t *data, unsigned int index,
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void *user);
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#define HAL_CAMERA_PREVIEW_WINDOW_TAG 0xcafed00d
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typedef struct preview_stream_ops {
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int (*dequeue_buffer)(struct preview_stream_ops* w,
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buffer_handle_t** buffer, int *stride);
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int (*enqueue_buffer)(struct preview_stream_ops* w,
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buffer_handle_t* buffer);
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int (*cancel_buffer)(struct preview_stream_ops* w,
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buffer_handle_t* buffer);
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int (*set_buffer_count)(struct preview_stream_ops* w, int count);
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int (*set_buffers_geometry)(struct preview_stream_ops* pw,
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int w, int h, int format);
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int (*set_crop)(struct preview_stream_ops *w,
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int left, int top, int right, int bottom);
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int (*set_usage)(struct preview_stream_ops* w, int usage);
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int (*set_swap_interval)(struct preview_stream_ops *w, int interval);
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int (*get_min_undequeued_buffer_count)(const struct preview_stream_ops *w,
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int *count);
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int (*lock_buffer)(struct preview_stream_ops* w,
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buffer_handle_t* buffer);
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} preview_stream_ops_t;
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struct camera_device;
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typedef struct camera_device_ops {
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/** Set the ANativeWindow to which preview frames are sent */
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int (*set_preview_window)(struct camera_device *,
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struct preview_stream_ops *window);
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/** Set the notification and data callbacks */
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void (*set_callbacks)(struct camera_device *,
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camera_notify_callback notify_cb,
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camera_data_callback data_cb,
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camera_data_timestamp_callback data_cb_timestamp,
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camera_request_memory get_memory,
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void *user);
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/**
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* The following three functions all take a msg_type, which is a bitmask of
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* the messages defined in include/ui/Camera.h
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*/
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/**
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* Enable a message, or set of messages.
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*/
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void (*enable_msg_type)(struct camera_device *, int32_t msg_type);
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/**
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* Disable a message, or a set of messages.
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*
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* Once received a call to disableMsgType(CAMERA_MSG_VIDEO_FRAME), camera
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* HAL should not rely on its client to call releaseRecordingFrame() to
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* release video recording frames sent out by the cameral HAL before and
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* after the disableMsgType(CAMERA_MSG_VIDEO_FRAME) call. Camera HAL
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* clients must not modify/access any video recording frame after calling
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* disableMsgType(CAMERA_MSG_VIDEO_FRAME).
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*/
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void (*disable_msg_type)(struct camera_device *, int32_t msg_type);
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/**
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* Query whether a message, or a set of messages, is enabled. Note that
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* this is operates as an AND, if any of the messages queried are off, this
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* will return false.
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*/
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int (*msg_type_enabled)(struct camera_device *, int32_t msg_type);
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/**
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* Start preview mode.
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*/
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int (*start_preview)(struct camera_device *);
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/**
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* Stop a previously started preview.
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*/
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void (*stop_preview)(struct camera_device *);
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/**
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* Returns true if preview is enabled.
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*/
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int (*preview_enabled)(struct camera_device *);
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/**
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* Request the camera HAL to store meta data or real YUV data in the video
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* buffers sent out via CAMERA_MSG_VIDEO_FRAME for a recording session. If
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* it is not called, the default camera HAL behavior is to store real YUV
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* data in the video buffers.
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*
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* This method should be called before startRecording() in order to be
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* effective.
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*
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* If meta data is stored in the video buffers, it is up to the receiver of
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* the video buffers to interpret the contents and to find the actual frame
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* data with the help of the meta data in the buffer. How this is done is
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* outside of the scope of this method.
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*
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* Some camera HALs may not support storing meta data in the video buffers,
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* but all camera HALs should support storing real YUV data in the video
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* buffers. If the camera HAL does not support storing the meta data in the
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* video buffers when it is requested to do do, INVALID_OPERATION must be
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* returned. It is very useful for the camera HAL to pass meta data rather
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* than the actual frame data directly to the video encoder, since the
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* amount of the uncompressed frame data can be very large if video size is
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* large.
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*
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* @param enable if true to instruct the camera HAL to store
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* meta data in the video buffers; false to instruct
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* the camera HAL to store real YUV data in the video
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* buffers.
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*
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* @return OK on success.
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*/
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int (*store_meta_data_in_buffers)(struct camera_device *, int enable);
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/**
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* Start record mode. When a record image is available, a
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* CAMERA_MSG_VIDEO_FRAME message is sent with the corresponding
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* frame. Every record frame must be released by a camera HAL client via
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* releaseRecordingFrame() before the client calls
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* disableMsgType(CAMERA_MSG_VIDEO_FRAME). After the client calls
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* disableMsgType(CAMERA_MSG_VIDEO_FRAME), it is the camera HAL's
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* responsibility to manage the life-cycle of the video recording frames,
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* and the client must not modify/access any video recording frames.
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*/
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int (*start_recording)(struct camera_device *);
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/**
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* Stop a previously started recording.
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*/
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void (*stop_recording)(struct camera_device *);
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/**
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* Returns true if recording is enabled.
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*/
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int (*recording_enabled)(struct camera_device *);
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/**
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* Release a record frame previously returned by CAMERA_MSG_VIDEO_FRAME.
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*
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* It is camera HAL client's responsibility to release video recording
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* frames sent out by the camera HAL before the camera HAL receives a call
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* to disableMsgType(CAMERA_MSG_VIDEO_FRAME). After it receives the call to
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* disableMsgType(CAMERA_MSG_VIDEO_FRAME), it is the camera HAL's
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* responsibility to manage the life-cycle of the video recording frames.
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*/
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void (*release_recording_frame)(struct camera_device *,
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const void *opaque);
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/**
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* Start auto focus, the notification callback routine is called with
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* CAMERA_MSG_FOCUS once when focusing is complete. autoFocus() will be
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* called again if another auto focus is needed.
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*/
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int (*auto_focus)(struct camera_device *);
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/**
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* Cancels auto-focus function. If the auto-focus is still in progress,
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* this function will cancel it. Whether the auto-focus is in progress or
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* not, this function will return the focus position to the default. If
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* the camera does not support auto-focus, this is a no-op.
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*/
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int (*cancel_auto_focus)(struct camera_device *);
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/**
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* Take a picture.
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*/
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int (*take_picture)(struct camera_device *);
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/**
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* Cancel a picture that was started with takePicture. Calling this method
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* when no picture is being taken is a no-op.
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*/
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int (*cancel_picture)(struct camera_device *);
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/**
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* Set the camera parameters. This returns BAD_VALUE if any parameter is
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* invalid or not supported.
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*/
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int (*set_parameters)(struct camera_device *, const char *parms);
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/** Retrieve the camera parameters. The buffer returned by the camera HAL
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must be returned back to it with put_parameters, if put_parameters
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is not NULL.
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*/
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char *(*get_parameters)(struct camera_device *);
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/** The camera HAL uses its own memory to pass us the parameters when we
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call get_parameters. Use this function to return the memory back to
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the camera HAL, if put_parameters is not NULL. If put_parameters
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is NULL, then you have to use free() to release the memory.
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*/
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void (*put_parameters)(struct camera_device *, char *);
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/**
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* Send command to camera driver.
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*/
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int (*send_command)(struct camera_device *,
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int32_t cmd, int32_t arg1, int32_t arg2);
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/**
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* Release the hardware resources owned by this object. Note that this is
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* *not* done in the destructor.
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*/
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void (*release)(struct camera_device *);
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/**
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* Dump state of the camera hardware
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*/
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int (*dump)(struct camera_device *, int fd);
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} camera_device_ops_t;
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typedef struct camera_device {
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hw_device_t common;
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camera_device_ops_t *ops;
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void *priv;
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} camera_device_t;
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__END_DECLS
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#endif /* ANDROID_INCLUDE_CAMERA_H */
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