StreamingProcessor.h revision d309fb9c8a2c4564d88fffba19c4e3688e4b862b 
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
34struct 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<Surface> 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 setRecordingFormat(int format, android_dataspace_t dataspace);
57
58    status_t updateRecordingRequest(const Parameters &params);
59    // If needsUpdate is set to true, a updateRecordingStream call with params will recreate
60    // recording stream
61    status_t recordingStreamNeedsUpdate(const Parameters &params, bool *needsUpdate);
62    status_t updateRecordingStream(const Parameters &params);
63    status_t deleteRecordingStream();
64    int getRecordingStreamId() const;
65
66    enum StreamType {
67        NONE,
68        PREVIEW,
69        RECORD
70    };
71    status_t startStream(StreamType type,
72            const Vector<int32_t> &outputStreams);
73
74    // Toggle between paused and unpaused. Stream must be started first.
75    status_t togglePauseStream(bool pause);
76
77    status_t stopStream();
78
79    // Returns the request ID for the currently streaming request
80    // Returns 0 if there is no active request.
81    status_t getActiveRequestId() const;
82    status_t incrementStreamingIds();
83
84    // Callback for new recording frames from HAL
85    virtual void onFrameAvailable(const BufferItem& item);
86    // Callback from stagefright which returns used recording frames
87    void releaseRecordingFrame(const sp<IMemory>& mem);
88
89    status_t dump(int fd, const Vector<String16>& args);
90
91  private:
92    mutable Mutex mMutex;
93
94    enum {
95        NO_STREAM = -1
96    };
97
98    wp<Camera2Client> mClient;
99    wp<CameraDeviceBase> mDevice;
100    int mId;
101
102    StreamType mActiveRequest;
103    bool mPaused;
104
105    Vector<int32_t> mActiveStreamIds;
106
107    // Preview-related members
108    int32_t mPreviewRequestId;
109    int mPreviewStreamId;
110    CameraMetadata mPreviewRequest;
111    sp<Surface> mPreviewWindow;
112
113    // Recording-related members
114    static const nsecs_t kWaitDuration = 50000000; // 50 ms
115
116    int32_t mRecordingRequestId;
117    int mRecordingStreamId;
118    int mRecordingFrameCount;
119    sp<BufferItemConsumer> mRecordingConsumer;
120    sp<Surface>  mRecordingWindow;
121    CameraMetadata mRecordingRequest;
122    sp<camera2::Camera2Heap> mRecordingHeap;
123
124    bool mRecordingFrameAvailable;
125    Condition mRecordingFrameAvailableSignal;
126
127    static const size_t kDefaultRecordingHeapCount = 8;
128    size_t mRecordingHeapCount;
129    Vector<BufferItem> mRecordingBuffers;
130    size_t mRecordingHeapHead, mRecordingHeapFree;
131
132    static const int kDefaultRecordingFormat =
133            HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
134    int mRecordingFormat;
135
136    static const android_dataspace kDefaultRecordingDataSpace =
137            HAL_DATASPACE_BT709;
138    android_dataspace mRecordingDataSpace;
139
140    static const int kDefaultRecordingGrallocUsage =
141            GRALLOC_USAGE_HW_VIDEO_ENCODER;
142    int mRecordingGrallocUsage;
143
144    virtual bool threadLoop();
145
146    status_t processRecordingFrame();
147
148    // Unilaterally free any buffers still outstanding to stagefright
149    void releaseAllRecordingFramesLocked();
150
151    // Determine if the specified stream is currently in use
152    static bool isStreamActive(const Vector<int32_t> &streams,
153            int32_t recordingStreamId);
154};
155
156
157}; // namespace camera2
158}; // namespace android
159
160#endif
161