StreamingProcessor.h revision d1d6467d3bcbc1305eeba0176a2edf04925c368e 
1/*
2 * Copyright (C) 2012 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_CAMERA_CAMERA2_STREAMINGPROCESSOR_H
18#define ANDROID_SERVERS_CAMERA_CAMERA2_STREAMINGPROCESSOR_H
19
20#include <utils/Mutex.h>
21#include <utils/String16.h>
22#include <gui/BufferItemConsumer.h>
23
24#include "camera/CameraMetadata.h"
25
26namespace android {
27
28class Camera2Client;
29class CameraDeviceBase;
30class IMemory;
31
32namespace camera2 {
33
34class Parameters;
35class Camera2Heap;
36
37/**
38 * Management and processing for preview and recording streams
39 */
40class StreamingProcessor:
41            public Thread, public BufferItemConsumer::FrameAvailableListener {
42  public:
43    StreamingProcessor(sp<Camera2Client> client);
44    ~StreamingProcessor();
45
46    status_t setPreviewWindow(sp<ANativeWindow> window);
47
48    bool haveValidPreviewWindow() const;
49
50    status_t updatePreviewRequest(const Parameters &params);
51    status_t updatePreviewStream(const Parameters &params);
52    status_t deletePreviewStream();
53    int getPreviewStreamId() const;
54
55    status_t setRecordingBufferCount(size_t count);
56    status_t updateRecordingRequest(const Parameters &params);
57    status_t updateRecordingStream(const Parameters &params);
58    status_t deleteRecordingStream();
59    int getRecordingStreamId() const;
60
61    enum StreamType {
62        NONE,
63        PREVIEW,
64        RECORD
65    };
66    status_t startStream(StreamType type,
67            const Vector<int32_t> &outputStreams);
68
69    // Toggle between paused and unpaused. Stream must be started first.
70    status_t togglePauseStream(bool pause);
71
72    status_t stopStream();
73
74    // Returns the request ID for the currently streaming request
75    // Returns 0 if there is no active request.
76    status_t getActiveRequestId() const;
77    status_t incrementStreamingIds();
78
79    // Callback for new recording frames from HAL
80    virtual void onFrameAvailable();
81    // Callback from stagefright which returns used recording frames
82    void releaseRecordingFrame(const sp<IMemory>& mem);
83
84    status_t dump(int fd, const Vector<String16>& args);
85
86  private:
87    mutable Mutex mMutex;
88
89    enum {
90        NO_STREAM = -1
91    };
92
93    wp<Camera2Client> mClient;
94    wp<CameraDeviceBase> mDevice;
95    int mId;
96
97    StreamType mActiveRequest;
98    bool mPaused;
99
100    Vector<int32_t> mActiveStreamIds;
101
102    // Preview-related members
103    int32_t mPreviewRequestId;
104    int mPreviewStreamId;
105    CameraMetadata mPreviewRequest;
106    sp<ANativeWindow> mPreviewWindow;
107
108    // Recording-related members
109    static const nsecs_t kWaitDuration = 50000000; // 50 ms
110
111    int32_t mRecordingRequestId;
112    int mRecordingStreamId;
113    int mRecordingFrameCount;
114    sp<BufferItemConsumer> mRecordingConsumer;
115    sp<ANativeWindow>  mRecordingWindow;
116    CameraMetadata mRecordingRequest;
117    sp<camera2::Camera2Heap> mRecordingHeap;
118
119    bool mRecordingFrameAvailable;
120    Condition mRecordingFrameAvailableSignal;
121
122    static const size_t kDefaultRecordingHeapCount = 8;
123    size_t mRecordingHeapCount;
124    Vector<BufferItemConsumer::BufferItem> mRecordingBuffers;
125    size_t mRecordingHeapHead, mRecordingHeapFree;
126
127    virtual bool threadLoop();
128
129    status_t processRecordingFrame();
130
131    // Unilaterally free any buffers still outstanding to stagefright
132    void releaseAllRecordingFramesLocked();
133
134    // Determine if the specified stream is currently in use
135    static bool isStreamActive(const Vector<int32_t> &streams,
136            int32_t recordingStreamId);
137};
138
139
140}; // namespace camera2
141}; // namespace android
142
143#endif
144