1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HARDWARE_ICAMERA_H
18#define ANDROID_HARDWARE_ICAMERA_H
19
20#include <utils/RefBase.h>
21#include <binder/IInterface.h>
22#include <binder/Parcel.h>
23#include <binder/IMemory.h>
24#include <binder/Status.h>
25#include <utils/String8.h>
26
27namespace android {
28
29class IGraphicBufferProducer;
30class Surface;
31
32namespace hardware {
33
34class ICameraClient;
35
36class ICamera: public android::IInterface
37{
38    /**
39     * Keep up-to-date with ICamera.aidl in frameworks/base
40     */
41public:
42    enum {
43        // Pass real YUV data in video buffers through ICameraClient.dataCallbackTimestamp().
44        VIDEO_BUFFER_MODE_DATA_CALLBACK_YUV = 0,
45        // Pass metadata in video buffers through ICameraClient.dataCallbackTimestamp().
46        VIDEO_BUFFER_MODE_DATA_CALLBACK_METADATA = 1,
47        // Pass video buffers through IGraphicBufferProducer set with setVideoTarget().
48        VIDEO_BUFFER_MODE_BUFFER_QUEUE = 2,
49    };
50
51    DECLARE_META_INTERFACE(Camera);
52
53    virtual binder::Status  disconnect() = 0;
54
55    // connect new client with existing camera remote
56    virtual status_t        connect(const sp<ICameraClient>& client) = 0;
57
58    // prevent other processes from using this ICamera interface
59    virtual status_t        lock() = 0;
60
61    // allow other processes to use this ICamera interface
62    virtual status_t        unlock() = 0;
63
64    // pass the buffered IGraphicBufferProducer to the camera service
65    virtual status_t        setPreviewTarget(
66            const sp<IGraphicBufferProducer>& bufferProducer) = 0;
67
68    // set the preview callback flag to affect how the received frames from
69    // preview are handled. Enabling preview callback flags disables any active
70    // preview callback surface set by setPreviewCallbackTarget().
71    virtual void            setPreviewCallbackFlag(int flag) = 0;
72    // set a buffer interface to use for client-received preview frames instead
73    // of preview callback buffers. Passing a valid interface here disables any
74    // active preview callbacks set by setPreviewCallbackFlag(). Passing NULL
75    // disables the use of the callback target.
76    virtual status_t        setPreviewCallbackTarget(
77            const sp<IGraphicBufferProducer>& callbackProducer) = 0;
78
79    // start preview mode, must call setPreviewTarget first
80    virtual status_t        startPreview() = 0;
81
82    // stop preview mode
83    virtual void            stopPreview() = 0;
84
85    // get preview state
86    virtual bool            previewEnabled() = 0;
87
88    // start recording mode
89    virtual status_t        startRecording() = 0;
90
91    // stop recording mode
92    virtual void            stopRecording() = 0;
93
94    // get recording state
95    virtual bool            recordingEnabled() = 0;
96
97    // Release a recording frame that was received via ICameraClient::dataCallbackTimestamp.
98    virtual void            releaseRecordingFrame(const sp<IMemory>& mem) = 0;
99
100    // Release a recording frame handle that was received via
101    // ICameraClient::recordingFrameHandleCallbackTimestamp.
102    virtual void            releaseRecordingFrameHandle(native_handle_t *handle) = 0;
103
104    // Release a batch of recording frame handles that was received via
105    // ICameraClient::recordingFrameHandleCallbackTimestampBatch
106    virtual void            releaseRecordingFrameHandleBatch(
107            const std::vector<native_handle_t*>& handles) = 0;
108
109    // auto focus
110    virtual status_t        autoFocus() = 0;
111
112    // cancel auto focus
113    virtual status_t        cancelAutoFocus() = 0;
114
115    /*
116     * take a picture.
117     * @param msgType the message type an application selectively turn on/off
118     * on a photo-by-photo basis. The supported message types are:
119     * CAMERA_MSG_SHUTTER, CAMERA_MSG_RAW_IMAGE, CAMERA_MSG_COMPRESSED_IMAGE,
120     * and CAMERA_MSG_POSTVIEW_FRAME. Any other message types will be ignored.
121     */
122    virtual status_t        takePicture(int msgType) = 0;
123
124    // set preview/capture parameters - key/value pairs
125    virtual status_t        setParameters(const String8& params) = 0;
126
127    // get preview/capture parameters - key/value pairs
128    virtual String8         getParameters() const = 0;
129
130    // send command to camera driver
131    virtual status_t        sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0;
132
133
134    // Tell camera how to pass video buffers. videoBufferMode is one of VIDEO_BUFFER_MODE_*.
135    // Returns OK if the specified video buffer mode is supported. If videoBufferMode is
136    // VIDEO_BUFFER_MODE_BUFFER_QUEUE, setVideoTarget() must be called before starting video
137    // recording.
138    virtual status_t        setVideoBufferMode(int32_t videoBufferMode) = 0;
139
140    // Set the video buffer producer for camera to use in VIDEO_BUFFER_MODE_BUFFER_QUEUE mode.
141    virtual status_t        setVideoTarget(
142            const sp<IGraphicBufferProducer>& bufferProducer) = 0;
143};
144
145// ----------------------------------------------------------------------------
146
147class BnCamera: public android::BnInterface<ICamera>
148{
149public:
150    virtual status_t    onTransact( uint32_t code,
151                                    const Parcel& data,
152                                    Parcel* reply,
153                                    uint32_t flags = 0);
154};
155
156} // namespace hardware
157} // namespace android
158
159#endif
160