blob: 828a9d35283634bce376262762f6f6400f8645ec (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DISPATCHER_IMPL_H_
#define MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DISPATCHER_IMPL_H_
#include <memory>
#include <set>
#include "base/containers/unique_ptr_adapters.h"
#include "base/files/scoped_file.h"
#include "base/memory/singleton.h"
#include "base/threading/thread.h"
#include "components/chromeos_camera/common/jpeg_encode_accelerator.mojom.h"
#include "components/chromeos_camera/common/mjpeg_decode_accelerator.mojom.h"
#include "media/capture/capture_export.h"
#include "media/capture/video/chromeos/mojo/cros_camera_service.mojom.h"
#include "media/capture/video/chromeos/video_capture_device_factory_chromeos.h"
#include "media/capture/video/video_capture_device_factory.h"
#include "mojo/public/cpp/bindings/binding_set.h"
#include "mojo/public/cpp/bindings/interface_ptr_set.h"
#include "mojo/public/cpp/platform/platform_channel_server_endpoint.h"
namespace base {
class SingleThreadTaskRunner;
class WaitableEvent;
} // namespace base
namespace media {
using MojoJpegEncodeAcceleratorFactoryCB = base::RepeatingCallback<void(
chromeos_camera::mojom::JpegEncodeAcceleratorRequest)>;
class CAPTURE_EXPORT CameraClientObserver {
public:
virtual ~CameraClientObserver();
virtual void OnChannelCreated(cros::mojom::CameraModulePtr camera_module) = 0;
};
// The CameraHalDispatcherImpl hosts and waits on the unix domain socket
// /var/run/camera3.sock. CameraHalServer and CameraHalClients connect to the
// unix domain socket to create the initial Mojo connections with the
// CameraHalDisptcherImpl, and CameraHalDispatcherImpl then creates and
// dispaches the Mojo channels between CameraHalServer and CameraHalClients to
// establish direct Mojo connections between the CameraHalServer and the
// CameraHalClients.
//
// For general documentation about the CameraHalDispater Mojo interface see the
// comments in mojo/cros_camera_service.mojom.
class CAPTURE_EXPORT CameraHalDispatcherImpl final
: public cros::mojom::CameraHalDispatcher,
public base::trace_event::TraceLog::EnabledStateObserver {
public:
static CameraHalDispatcherImpl* GetInstance();
bool Start(MojoMjpegDecodeAcceleratorFactoryCB jda_factory,
MojoJpegEncodeAcceleratorFactoryCB jea_factory);
void AddClientObserver(std::unique_ptr<CameraClientObserver> observer);
bool IsStarted();
// CameraHalDispatcher implementations.
void RegisterServer(cros::mojom::CameraHalServerPtr server) final;
void RegisterClient(cros::mojom::CameraHalClientPtr client) final;
void GetJpegDecodeAccelerator(
chromeos_camera::mojom::MjpegDecodeAcceleratorRequest jda_request) final;
void GetJpegEncodeAccelerator(
chromeos_camera::mojom::JpegEncodeAcceleratorRequest jea_request) final;
// base::trace_event::TraceLog::EnabledStateObserver implementation.
void OnTraceLogEnabled() final;
void OnTraceLogDisabled() final;
private:
friend struct base::DefaultSingletonTraits<CameraHalDispatcherImpl>;
// Allow the test to construct the class directly.
friend class CameraHalDispatcherImplTest;
CameraHalDispatcherImpl();
~CameraHalDispatcherImpl() final;
bool StartThreads();
// Creates the unix domain socket for the camera client processes and the
// camera HALv3 adapter process to connect.
void CreateSocket(base::WaitableEvent* started);
// Waits for incoming connections (from HAL process or from client processes).
// Runs on |blocking_io_thread_|.
void StartServiceLoop(base::ScopedFD socket_fd, base::WaitableEvent* started);
void AddClientObserverOnProxyThread(
std::unique_ptr<CameraClientObserver> observer);
void EstablishMojoChannel(CameraClientObserver* client_observer);
// Handler for incoming Mojo connection on the unix domain socket.
void OnPeerConnected(mojo::ScopedMessagePipeHandle message_pipe);
// Mojo connection error handlers.
void OnCameraHalServerConnectionError();
void OnCameraHalClientConnectionError(CameraClientObserver* client);
void StopOnProxyThread();
void OnTraceLogEnabledOnProxyThread();
void OnTraceLogDisabledOnProxyThread();
base::ScopedFD proxy_fd_;
base::ScopedFD cancel_pipe_;
base::Thread proxy_thread_;
base::Thread blocking_io_thread_;
scoped_refptr<base::SingleThreadTaskRunner> proxy_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> blocking_io_task_runner_;
mojo::BindingSet<cros::mojom::CameraHalDispatcher> binding_set_;
cros::mojom::CameraHalServerPtr camera_hal_server_;
std::set<std::unique_ptr<CameraClientObserver>, base::UniquePtrComparator>
client_observers_;
MojoMjpegDecodeAcceleratorFactoryCB jda_factory_;
MojoJpegEncodeAcceleratorFactoryCB jea_factory_;
DISALLOW_COPY_AND_ASSIGN(CameraHalDispatcherImpl);
};
} // namespace media
#endif // MEDIA_CAPTURE_VIDEO_CHROMEOS_CAMERA_HAL_DISPATCHER_IMPL_H_
|
