StreamingProcessor.h revision a53021f776d0c82271727e5817388936513feb92 
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    // If needsUpdate is set to true, a updateRecordingStream call with params will recreate
58    // recording stream
59    status_t recordingStreamNeedsUpdate(const Parameters &params, bool *needsUpdate);
60    status_t updateRecordingStream(const Parameters &params);
61    status_t deleteRecordingStream();
62    int getRecordingStreamId() const;
63
64    enum StreamType {
65        NONE,
66        PREVIEW,
67        RECORD
68    };
69    status_t startStream(StreamType type,
70            const Vector<int32_t> &outputStreams);
71
72    // Toggle between paused and unpaused. Stream must be started first.
73    status_t togglePauseStream(bool pause);
74
75    status_t stopStream();
76
77    // Returns the request ID for the currently streaming request
78    // Returns 0 if there is no active request.
79    status_t getActiveRequestId() const;
80    status_t incrementStreamingIds();
81
82    // Callback for new recording frames from HAL
83    virtual void onFrameAvailable();
84    // Callback from stagefright which returns used recording frames
85    void releaseRecordingFrame(const sp<IMemory>& mem);
86
87    status_t dump(int fd, const Vector<String16>& args);
88
89  private:
90    mutable Mutex mMutex;
91
92    enum {
93        NO_STREAM = -1
94    };
95
96    wp<Camera2Client> mClient;
97    wp<CameraDeviceBase> mDevice;
98    int mId;
99
100    StreamType mActiveRequest;
101    bool mPaused;
102
103    Vector<int32_t> mActiveStreamIds;
104
105    // Preview-related members
106    int32_t mPreviewRequestId;
107    int mPreviewStreamId;
108    CameraMetadata mPreviewRequest;
109    sp<ANativeWindow> mPreviewWindow;
110
111    // Recording-related members
112    static const nsecs_t kWaitDuration = 50000000; // 50 ms
113
114    int32_t mRecordingRequestId;
115    int mRecordingStreamId;
116    int mRecordingFrameCount;
117    sp<BufferItemConsumer> mRecordingConsumer;
118    sp<ANativeWindow>  mRecordingWindow;
119    CameraMetadata mRecordingRequest;
120    sp<camera2::Camera2Heap> mRecordingHeap;
121
122    bool mRecordingFrameAvailable;
123    Condition mRecordingFrameAvailableSignal;
124
125    static const size_t kDefaultRecordingHeapCount = 8;
126    size_t mRecordingHeapCount;
127    Vector<BufferItemConsumer::BufferItem> mRecordingBuffers;
128    size_t mRecordingHeapHead, mRecordingHeapFree;
129
130    virtual bool threadLoop();
131
132    status_t processRecordingFrame();
133
134    // Unilaterally free any buffers still outstanding to stagefright
135    void releaseAllRecordingFramesLocked();
136
137    // Determine if the specified stream is currently in use
138    static bool isStreamActive(const Vector<int32_t> &streams,
139            int32_t recordingStreamId);
140};
141
142
143}; // namespace camera2
144}; // namespace android
145
146#endif
147