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Side by Side Diff: media/capture/video/android/video_capture_device_android.h

Issue 2143903003: [WIP] Move media/capture to device/capture (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 5 months ago
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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef MEDIA_CAPTURE_VIDEO_ANDROID_VIDEO_CAPTURE_DEVICE_ANDROID_H_
6 #define MEDIA_CAPTURE_VIDEO_ANDROID_VIDEO_CAPTURE_DEVICE_ANDROID_H_
7
8 #include <jni.h>
9 #include <string>
10
11 #include "base/android/scoped_java_ref.h"
12 #include "base/macros.h"
13 #include "base/synchronization/lock.h"
14 #include "base/threading/thread.h"
15 #include "base/time/time.h"
16 #include "media/capture/capture_export.h"
17 #include "media/capture/video/video_capture_device.h"
18
19 namespace tracked_objects {
20 class Location;
21 } // namespace tracked_
22
23 namespace media {
24
25 // VideoCaptureDevice on Android. The VideoCaptureDevice API's are called
26 // by VideoCaptureManager on its own thread, while OnFrameAvailable is called
27 // on JAVA thread (i.e., UI thread). Both will access |state_| and |client_|,
28 // but only VideoCaptureManager would change their value.
29 class CAPTURE_EXPORT VideoCaptureDeviceAndroid : public VideoCaptureDevice {
30 public:
31 // Automatically generated enum to interface with Java world.
32 //
33 // A Java counterpart will be generated for this enum.
34 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.media
35 enum AndroidImageFormat {
36 // Android graphics ImageFormat mapping, see reference in:
37 // http://developer.android.com/reference/android/graphics/ImageFormat.html
38 ANDROID_IMAGE_FORMAT_NV21 = 17,
39 ANDROID_IMAGE_FORMAT_YUV_420_888 = 35,
40 ANDROID_IMAGE_FORMAT_YV12 = 842094169,
41 ANDROID_IMAGE_FORMAT_UNKNOWN = 0,
42 };
43
44 explicit VideoCaptureDeviceAndroid(const Name& device_name);
45 ~VideoCaptureDeviceAndroid() override;
46
47 static VideoCaptureDevice* Create(const Name& device_name);
48 static bool RegisterVideoCaptureDevice(JNIEnv* env);
49
50 // Registers the Java VideoCaptureDevice pointer, used by the rest of the
51 // methods of the class to operate the Java capture code. This method must be
52 // called after the class constructor and before AllocateAndStart().
53 bool Init();
54
55 // VideoCaptureDevice implementation.
56 void AllocateAndStart(const VideoCaptureParams& params,
57 std::unique_ptr<Client> client) override;
58 void StopAndDeAllocate() override;
59 void GetPhotoCapabilities(GetPhotoCapabilitiesCallback callback) override;
60 void SetPhotoOptions(mojom::PhotoSettingsPtr settings,
61 SetPhotoOptionsCallback callback) override;
62 void TakePhoto(TakePhotoCallback callback) override;
63
64 // Implement org.chromium.media.VideoCapture.nativeOnFrameAvailable.
65 void OnFrameAvailable(JNIEnv* env,
66 const base::android::JavaParamRef<jobject>& obj,
67 const base::android::JavaParamRef<jbyteArray>& data,
68 jint length,
69 jint rotation);
70
71 // Implement org.chromium.media.VideoCapture.nativeOnError.
72 void OnError(JNIEnv* env,
73 const base::android::JavaParamRef<jobject>& obj,
74 const base::android::JavaParamRef<jstring>& message);
75
76 // Implement org.chromium.media.VideoCapture.nativeOnPhotoTaken.
77 void OnPhotoTaken(JNIEnv* env,
78 const base::android::JavaParamRef<jobject>& obj,
79 jlong callback_id,
80 const base::android::JavaParamRef<jbyteArray>& data);
81
82 private:
83 enum InternalState {
84 kIdle, // The device is opened but not in use.
85 kCapturing, // Video is being captured.
86 kError // Hit error. User needs to recover by destroying the object.
87 };
88
89 VideoPixelFormat GetColorspace();
90 void SetErrorState(const tracked_objects::Location& from_here,
91 const std::string& reason);
92
93 // Prevent racing on accessing |state_| and |client_| since both could be
94 // accessed from different threads.
95 base::Lock lock_;
96 InternalState state_;
97 bool got_first_frame_;
98 base::TimeTicks expected_next_frame_time_;
99 base::TimeTicks first_ref_time_;
100 base::TimeDelta frame_interval_;
101 std::unique_ptr<VideoCaptureDevice::Client> client_;
102
103 // List of |photo_callbacks_| in flight, being served in Java side.
104 base::Lock photo_callbacks_lock_;
105 std::list<std::unique_ptr<TakePhotoCallback>> photo_callbacks_;
106
107 Name device_name_;
108 VideoCaptureFormat capture_format_;
109
110 // Java VideoCaptureAndroid instance.
111 base::android::ScopedJavaLocalRef<jobject> j_capture_;
112
113 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceAndroid);
114 };
115
116 } // namespace media
117
118 #endif // MEDIA_CAPTURE_VIDEO_ANDROID_VIDEO_CAPTURE_DEVICE_ANDROID_H_
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