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1 // Copyright 2016 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 #include "media/capture/service/stream_impl.h" | |
6 | |
7 #include "base/bind.h" | |
8 #include "base/callback.h" | |
9 #include "base/thread_task_runner_handle.h" | |
10 #include "base/time/time.h" | |
11 #include "media/base/bind_to_current_loop.h" | |
12 #include "media/capture/interfaces/video_capture.mojom.h" | |
13 #include "media/mojo/common/mojo_shared_buffer_video_frame.h" | |
14 #include "mojo/converters/geometry/geometry_type_converters.h" | |
15 | |
16 namespace media { | |
17 | |
18 StreamImpl::StreamImpl( | |
19 mojo::InterfaceRequest<mojom::VideoCaptureStream> request, | |
20 const base::Closure& start_callback, | |
21 const base::Closure& close_callback, | |
22 const base::Closure& error_callback) | |
23 : binding_(this, std::move(request)), | |
24 start_callback_(start_callback), | |
25 close_callback_(close_callback), | |
26 error_callback_(error_callback), | |
27 task_runner_(base::ThreadTaskRunnerHandle::Get()), | |
28 weak_factory_(this) { | |
29 binding_.set_connection_error_handler(error_callback_); | |
30 } | |
31 | |
32 StreamImpl::~StreamImpl() { | |
33 DCHECK(task_runner_->BelongsToCurrentThread()); | |
34 } | |
35 | |
36 void StreamImpl::Start(mojom::VideoCaptureStreamClientPtr client) { | |
37 DCHECK(task_runner_->BelongsToCurrentThread()); | |
38 DCHECK(!client_) << "Start() should not be called several times."; | |
39 client_ = std::move(client); | |
40 client_.set_connection_error_handler(error_callback_); | |
41 start_callback_.Run(); | |
perkj_chrome
2016/03/07 23:58:27
This callback seems pretty useless. The implementa
mcasas
2016/03/08 23:57:28
Removed.
| |
42 } | |
43 | |
44 void StreamImpl::Stop() { | |
45 DCHECK(task_runner_->BelongsToCurrentThread()); | |
46 DCHECK(client_); | |
47 close_callback_.Run(); | |
48 } | |
49 | |
50 void StreamImpl::OnFrame(const scoped_refptr<MojoSharedBufferVideoFrame>& frame, | |
51 const base::TimeTicks& timestamp) { | |
52 task_runner_->PostTask( | |
53 FROM_HERE, base::Bind(&StreamImpl::NotifyOnFrameAvailable, | |
54 weak_factory_.GetWeakPtr(), frame, timestamp)); | |
55 } | |
56 | |
57 void StreamImpl::OnError(const std::string& reason) { | |
58 DLOG(ERROR) << __FUNCTION__ << " " << reason; | |
59 task_runner_->PostTask( | |
60 FROM_HERE, | |
61 base::Bind(&StreamImpl::NotifyError, weak_factory_.GetWeakPtr(), reason)); | |
62 } | |
63 | |
64 void StreamImpl::NotifyOnFrameAvailable( | |
65 const scoped_refptr<MojoSharedBufferVideoFrame>& frame, | |
66 const base::TimeTicks& timestamp) { | |
67 DCHECK(task_runner_->BelongsToCurrentThread()); | |
68 DCHECK(client_); | |
69 | |
70 const int32_t buffer_id = running_buffer_id_++; | |
71 | |
72 mojom::FrameInfoPtr frame_info = mojom::FrameInfo::New(); | |
73 | |
74 // We duplicate the handle immediately to avoid passing around the primordial | |
75 // handle. While it's OK for someone to continue using the buffer after the | |
76 // pool drops ownership, it's not OK to dupe the primordial handle once it's | |
77 // been invalidated. | |
78 mojo::ScopedSharedBufferHandle handle; | |
79 MojoResult rv = mojo::DuplicateBuffer(frame->handle(), nullptr, &handle); | |
80 DLOG_IF(ERROR, rv != MOJO_RESULT_OK) << "Error duplicating handle"; | |
81 if (rv != MOJO_RESULT_OK) | |
82 return; | |
83 frame_info->storage_handle = std::move(handle); | |
84 frame_info->storage_size = frame->mapped_size(); | |
85 | |
86 frame_info->pixel_format = | |
87 static_cast<media::interfaces::VideoFormat>(frame->format()); | |
88 frame_info->coded_size = mojo::Size::From(frame->coded_size()); | |
89 frame_info->visible_rect = mojo::Rect::From(frame->visible_rect()); | |
90 frame_info->timestamp = timestamp.ToInternalValue(); | |
91 | |
92 in_use_video_frames_.insert(std::make_pair(buffer_id, frame)); | |
93 client_->OnFrameAvailable(std::move(frame_info), | |
94 base::Bind(&StreamImpl::OnFrameConsumed, | |
95 weak_factory_.GetWeakPtr(), buffer_id)); | |
96 } | |
97 | |
98 void StreamImpl::NotifyError(const mojo::String& error) { | |
99 DCHECK(task_runner_->BelongsToCurrentThread()); | |
100 // A device may notify of error(s) before Start() registers a |client_|. | |
101 if (client_) | |
102 client_->OnError(error); | |
103 error_callback_.Run(); | |
104 } | |
105 | |
106 void StreamImpl::OnFrameConsumed(int32_t buffer_id) { | |
107 DCHECK(task_runner_->BelongsToCurrentThread()); | |
108 const auto video_frame = in_use_video_frames_.find(buffer_id); | |
109 DCHECK(video_frame != in_use_video_frames_.end()) << "Buffer id " << buffer_id | |
110 << " not found!"; | |
111 in_use_video_frames_.erase(video_frame); | |
112 } | |
113 | |
114 } // namespace media | |
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