Camera3InputStream.h revision 618ff8a48a0c895a78f91f5692510c2a809425c3 
1/*
2 * Copyright (C) 2013 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_SERVERS_CAMERA3_INPUT_STREAM_H
18#define ANDROID_SERVERS_CAMERA3_INPUT_STREAM_H
19
20#include <utils/RefBase.h>
21#include <gui/Surface.h>
22#include <gui/BufferItemConsumer.h>
23
24#include "Camera3IOStreamBase.h"
25
26namespace android {
27
28namespace camera3 {
29
30/**
31 * A class for managing a single stream of input data to the camera device.
32 *
33 * This class serves as a consumer adapter for the HAL, and will consume the
34 * buffers by feeding them into the HAL, as well as releasing the buffers back
35 * the buffers once the HAL is done with them.
36 */
37class Camera3InputStream : public Camera3IOStreamBase {
38  public:
39    /**
40     * Set up a stream for formats that have fixed size, such as RAW and YUV.
41     */
42    Camera3InputStream(int id, uint32_t width, uint32_t height, int format);
43    ~Camera3InputStream();
44
45    virtual void     dump(int fd, const Vector<String16> &args) const;
46
47    // TODO: expose an interface to get the IGraphicBufferProducer
48
49  private:
50
51    sp<BufferItemConsumer> mConsumer;
52    sp<IGraphicBufferProducer> mProducer;
53    Vector<BufferItem> mBuffersInFlight;
54
55    /**
56     * Camera3IOStreamBase
57     */
58    virtual status_t returnBufferCheckedLocked(
59            const camera3_stream_buffer &buffer,
60            nsecs_t timestamp,
61            bool output,
62            /*out*/
63            sp<Fence> *releaseFenceOut);
64
65    /**
66     * Camera3Stream interface
67     */
68
69    virtual status_t getInputBufferLocked(camera3_stream_buffer *buffer);
70    virtual status_t returnInputBufferLocked(
71            const camera3_stream_buffer &buffer);
72    virtual status_t getInputBufferProducerLocked(
73            sp<IGraphicBufferProducer> *producer);
74    virtual status_t disconnectLocked();
75
76    virtual status_t configureQueueLocked();
77
78    virtual status_t getEndpointUsage(uint32_t *usage);
79
80}; // class Camera3InputStream
81
82}; // namespace camera3
83
84}; // namespace android
85
86#endif
87