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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Implementation of a fake VideoCaptureDevice class. Used for testing other | 5 // Implementation of a fake VideoCaptureDevice class. Used for testing other |
6 // video capture classes when no real hardware is available. | 6 // video capture classes when no real hardware is available. |
7 | 7 |
8 #ifndef MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_ | 8 #ifndef MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_ |
9 #define MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_ | 9 #define MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_ |
10 | 10 |
11 #include <string> | 11 #include <string> |
12 | 12 |
13 #include "base/atomicops.h" | 13 #include "base/atomicops.h" |
14 #include "base/memory/scoped_ptr.h" | 14 #include "base/memory/scoped_ptr.h" |
15 #include "base/threading/thread.h" | 15 #include "base/threading/thread.h" |
16 #include "media/video/capture/video_capture_device.h" | 16 #include "media/video/capture/video_capture_device.h" |
17 | 17 |
18 namespace media { | 18 namespace media { |
19 | 19 |
20 class MEDIA_EXPORT FakeVideoCaptureDevice : public VideoCaptureDevice { | 20 class MEDIA_EXPORT FakeVideoCaptureDevice : public VideoCaptureDevice { |
21 public: | 21 public: |
22 static VideoCaptureDevice* Create(const Name& device_name); | 22 static VideoCaptureDevice* Create(const Name& device_name); |
23 virtual ~FakeVideoCaptureDevice(); | 23 virtual ~FakeVideoCaptureDevice(); |
24 // Used for testing. This will make sure the next call to Create will | 24 // Used for testing. This will make sure the next call to Create will |
25 // return NULL; | 25 // return NULL; |
26 static void SetFailNextCreate(); | 26 static void SetFailNextCreate(); |
27 static void SetNumberOfFakeDevices(size_t number_of_devices); | 27 static void SetNumberOfFakeDevices(size_t number_of_devices); |
| 28 static int NumberOfFakeDevices(); |
28 | 29 |
29 static void GetDeviceNames(Names* device_names); | 30 static void GetDeviceNames(Names* device_names); |
30 static void GetDeviceSupportedFormats(const Name& device, | 31 static void GetDeviceSupportedFormats(const Name& device, |
31 VideoCaptureCapabilities* formats); | 32 VideoCaptureFormats* supported_formats); |
32 | 33 |
33 // VideoCaptureDevice implementation. | 34 // VideoCaptureDevice implementation. |
34 virtual void AllocateAndStart(const VideoCaptureParams& params, | 35 virtual void AllocateAndStart(const VideoCaptureParams& params, |
35 scoped_ptr<VideoCaptureDevice::Client> client) | 36 scoped_ptr<VideoCaptureDevice::Client> client) |
36 OVERRIDE; | 37 OVERRIDE; |
37 virtual void StopAndDeAllocate() OVERRIDE; | 38 virtual void StopAndDeAllocate() OVERRIDE; |
38 | 39 |
39 private: | 40 private: |
40 // Flag indicating the internal state. | 41 // Flag indicating the internal state. |
41 enum InternalState { | 42 enum InternalState { |
42 kIdle, | 43 kIdle, |
43 kCapturing, | 44 kCapturing, |
44 kError | 45 kError |
45 }; | 46 }; |
46 FakeVideoCaptureDevice(); | 47 FakeVideoCaptureDevice(); |
47 | 48 |
48 // Called on the capture_thread_. | 49 // Called on the capture_thread_. |
49 void OnCaptureTask(); | 50 void OnCaptureTask(); |
50 | |
51 // EXPERIMENTAL, similar to allocate, but changes resolution and calls | |
52 // client->OnFrameInfoChanged(VideoCaptureCapability&) | |
53 void Reallocate(); | 51 void Reallocate(); |
54 void PopulateFormatRoster(); | 52 void PopulateFormatRoster(); |
55 | 53 |
56 scoped_ptr<VideoCaptureDevice::Client> client_; | 54 scoped_ptr<VideoCaptureDevice::Client> client_; |
57 InternalState state_; | 55 InternalState state_; |
58 base::Thread capture_thread_; | 56 base::Thread capture_thread_; |
59 scoped_ptr<uint8[]> fake_frame_; | 57 scoped_ptr<uint8[]> fake_frame_; |
60 int frame_count_; | 58 int frame_count_; |
61 VideoCaptureFormat capture_format_; | 59 VideoCaptureFormat capture_format_; |
62 | 60 |
63 // When the device is configured as mutating video captures, this vector | 61 // When the device is configured as mutating video captures, this vector |
64 // holds the available ones which are used in sequence, restarting at the end. | 62 // holds the available ones which are used in sequence, restarting at the end. |
65 std::vector<VideoCaptureFormat> format_roster_; | 63 std::vector<VideoCaptureFormat> format_roster_; |
66 int format_roster_index_; | 64 int format_roster_index_; |
67 | 65 |
| 66 static int number_of_fake_devices_; |
68 static bool fail_next_create_; | 67 static bool fail_next_create_; |
69 // |number_of_devices_| is atomic since tests can call SetNumberOfFakeDevices | 68 // |number_of_devices_| is atomic since tests can call SetNumberOfFakeDevices |
70 // on the IO thread to set |number_of_devices_|. The variable can be | 69 // on the IO thread to set |number_of_devices_|. The variable can be |
71 // read from a separate thread. | 70 // read from a separate thread. |
72 // TODO(perkj): Make tests independent of global state. crbug/323913 | 71 // TODO(perkj): Make tests independent of global state. crbug/323913 |
73 static base::subtle::Atomic32 number_of_devices_; | 72 static base::subtle::Atomic32 number_of_devices_; |
74 | 73 |
75 DISALLOW_COPY_AND_ASSIGN(FakeVideoCaptureDevice); | 74 DISALLOW_COPY_AND_ASSIGN(FakeVideoCaptureDevice); |
76 }; | 75 }; |
77 | 76 |
78 } // namespace media | 77 } // namespace media |
79 | 78 |
80 #endif // MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_ | 79 #endif // MEDIA_VIDEO_CAPTURE_FAKE_VIDEO_CAPTURE_DEVICE_H_ |
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