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.
5 #ifndef MEDIA_VIDEO_CAPTURE_ANDROID_VIDEO_CAPTURE_DEVICE_ANDROID_H_
6 #define MEDIA_VIDEO_CAPTURE_ANDROID_VIDEO_CAPTURE_DEVICE_ANDROID_H_
11 #include "base/android/scoped_java_ref.h"
12 #include "base/synchronization/lock.h"
13 #include "base/threading/thread.h"
14 #include "base/time/time.h"
15 #include "media/base/media_export.h"
16 #include "media/video/capture/video_capture_device.h"
20 // VideoCaptureDevice on Android. The VideoCaptureDevice API's are called
21 // by VideoCaptureManager on its own thread, while OnFrameAvailable is called
22 // on JAVA thread (i.e., UI thread). Both will access |state_| and |client_|,
23 // but only VideoCaptureManager would change their value.
24 class MEDIA_EXPORT VideoCaptureDeviceAndroid : public VideoCaptureDevice {
26 virtual ~VideoCaptureDeviceAndroid();
28 static VideoCaptureDevice* Create(const Name& device_name);
29 static bool RegisterVideoCaptureDevice(JNIEnv* env);
31 // VideoCaptureDevice implementation.
32 virtual void AllocateAndStart(
33 const VideoCaptureCapability& capture_format,
34 scoped_ptr<Client> client) OVERRIDE;
35 virtual void StopAndDeAllocate() OVERRIDE;
37 // Implement org.chromium.media.VideoCapture.nativeOnFrameAvailable.
38 void OnFrameAvailable(
49 kIdle, // The device is opened but not in use.
50 kCapturing, // Video is being captured.
51 kError // Hit error. User needs to recover by destroying the object.
54 // Automatically generated enum to interface with Java world.
55 enum AndroidImageFormat {
56 #define DEFINE_ANDROID_IMAGEFORMAT(name, value) name = value,
57 #include "media/video/capture/android/imageformat_list.h"
58 #undef DEFINE_ANDROID_IMAGEFORMAT
61 explicit VideoCaptureDeviceAndroid(const Name& device_name);
63 VideoPixelFormat GetColorspace();
64 void SetErrorState(const std::string& reason);
66 // Prevent racing on accessing |state_| and |client_| since both could be
67 // accessed from different threads.
70 bool got_first_frame_;
71 base::TimeTicks expected_next_frame_time_;
72 base::TimeDelta frame_interval_;
73 scoped_ptr<VideoCaptureDevice::Client> client_;
76 VideoCaptureCapability current_settings_;
78 // Java VideoCaptureAndroid instance.
79 base::android::ScopedJavaGlobalRef<jobject> j_capture_;
81 DISALLOW_IMPLICIT_CONSTRUCTORS(VideoCaptureDeviceAndroid);
86 #endif // MEDIA_VIDEO_CAPTURE_ANDROID_VIDEO_CAPTURE_DEVICE_ANDROID_H_