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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/capture/service/mojo_video_frame.h" | |
14 #include "mojo/converters/geometry/geometry_type_converters.h" | |
15 | |
16 namespace media { | |
17 | |
18 StreamImpl::StreamImpl(mojo::InterfaceRequest<video_capture::Stream> request, | |
19 const base::Closure& start_callback, | |
20 const base::Closure& close_callback, | |
21 const base::Closure& error_callback) | |
22 : binding_(this, std::move(request)), | |
23 start_callback_(start_callback), | |
24 close_callback_(close_callback), | |
25 error_callback_(error_callback), | |
26 task_runner_(base::ThreadTaskRunnerHandle::Get()), | |
27 weak_factory_(this) { | |
28 binding_.set_connection_error_handler(error_callback_); | |
29 } | |
30 | |
31 StreamImpl::~StreamImpl() { | |
32 DCHECK(task_runner_->BelongsToCurrentThread()); | |
33 } | |
34 | |
35 void StreamImpl::Start(video_capture::StreamClientPtr client) { | |
36 DCHECK(task_runner_->BelongsToCurrentThread()); | |
37 DCHECK(!client_) << "Start() should not be called several times."; | |
38 DCHECK(!paused_); | |
39 client_ = std::move(client); | |
40 client_.set_connection_error_handler(error_callback_); | |
41 start_callback_.Run(); | |
42 } | |
43 | |
44 void StreamImpl::Pause() { | |
45 DCHECK(task_runner_->BelongsToCurrentThread()); | |
46 DCHECK(client_); | |
47 paused_ = true; | |
48 } | |
49 | |
50 void StreamImpl::Resume() { | |
51 DCHECK(task_runner_->BelongsToCurrentThread()); | |
52 DCHECK(client_); | |
53 paused_ = false; | |
54 } | |
55 | |
56 void StreamImpl::Stop() { | |
57 DCHECK(task_runner_->BelongsToCurrentThread()); | |
58 DCHECK(client_); | |
59 close_callback_.Run(); | |
60 } | |
61 | |
62 void StreamImpl::OnFrame(const scoped_refptr<MojoVideoFrame>& frame, | |
63 const base::TimeTicks& timestamp) { | |
64 task_runner_->PostTask( | |
65 FROM_HERE, base::Bind(&StreamImpl::NotifyFrameAvailable, | |
66 weak_factory_.GetWeakPtr(), frame, timestamp)); | |
67 } | |
68 | |
69 void StreamImpl::OnError(const std::string& reason) { | |
70 DLOG(ERROR) << __FUNCTION__ << " " << reason; | |
71 task_runner_->PostTask( | |
72 FROM_HERE, | |
73 base::Bind(&StreamImpl::NotifyError, weak_factory_.GetWeakPtr(), reason)); | |
74 } | |
75 | |
76 void StreamImpl::NotifyFrameAvailable( | |
77 const scoped_refptr<MojoVideoFrame>& frame, | |
78 const base::TimeTicks& timestamp) { | |
79 DCHECK(task_runner_->BelongsToCurrentThread()); | |
80 DCHECK(client_); | |
81 | |
82 if (paused_) // Drop the frame immediately if we aren't playing. | |
83 return; | |
84 | |
85 const int32_t buffer_id = running_buffer_id_++; | |
86 | |
87 video_capture::FrameInfoPtr frame_info = video_capture::FrameInfo::New(); | |
88 | |
89 // We duplicate the handle immediately to avoid passing around the primordial | |
90 // handle. While it's OK for someone to continue using the buffer after the | |
91 // pool drops ownership, it's not OK to dupe the primordial handle once it's | |
92 // been invalidated. | |
93 mojo::ScopedSharedBufferHandle handle; | |
94 MojoResult rv = mojo::DuplicateBuffer(frame->handle(), nullptr, &handle); | |
95 DLOG_IF(ERROR, rv != MOJO_RESULT_OK) << "Error duplicating handle"; | |
96 if (rv != MOJO_RESULT_OK) | |
97 return; | |
98 frame_info->storage_handle = std::move(handle); | |
99 frame_info->storage_size = frame->mapped_size(); | |
100 | |
101 frame_info->pixel_format = | |
102 static_cast<media::interfaces::VideoFormat>(frame->format()); | |
103 frame_info->coded_size = mojo::Size::From(frame->coded_size()); | |
104 frame_info->visible_rect = mojo::Rect::From(frame->visible_rect()); | |
105 frame_info->timestamp = timestamp.ToInternalValue(); | |
106 | |
107 in_use_video_frames_.insert(std::make_pair(buffer_id, frame)); | |
108 | |
109 client_->FrameAvailable(std::move(frame_info), | |
110 base::Bind(&StreamImpl::OnFrameConsumed, | |
111 weak_factory_.GetWeakPtr(), buffer_id)); | |
112 } | |
113 | |
114 void StreamImpl::NotifyError(const mojo::String& error) { | |
115 DCHECK(task_runner_->BelongsToCurrentThread()); | |
116 if (client_) // A devices can notify of errors before there is a |client_|. | |
Ken Rockot(use gerrit already)
2016/03/02 02:52:08
nit: "A device cannot notify" perhaps?
mcasas
2016/03/02 19:53:51
Rewritten.
| |
117 client_->Error(error); | |
118 error_callback_.Run(); | |
119 } | |
120 | |
121 void StreamImpl::OnFrameConsumed(int32_t buffer_id) { | |
122 DCHECK(task_runner_->BelongsToCurrentThread()); | |
123 const auto video_frame = in_use_video_frames_.find(buffer_id); | |
124 if (video_frame == in_use_video_frames_.end()) { | |
125 DLOG(ERROR) << "Buffer id " << buffer_id << " not found!"; | |
126 return; | |
127 } | |
128 in_use_video_frames_.erase(video_frame); | |
129 } | |
130 | |
131 } // namespace media | |
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