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Side by Side Diff: content/renderer/media/rtc_video_renderer.cc

Issue 10918052: create a separate WebMediaPlayer for URL derived from media stream (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: code review Created 8 years, 2 months ago
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1 // Copyright (c) 2012 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 "content/renderer/media/rtc_video_renderer.h"
6
7 #include "base/bind.h"
8 #include "base/location.h"
9 #include "base/logging.h"
10 #include "base/message_loop_proxy.h"
11 #include "media/base/video_frame.h"
12 #include "media/base/video_util.h"
13 #include "third_party/libjingle/source/talk/base/timeutils.h"
14 #include "third_party/libjingle/source/talk/media/base/videoframe.h"
15
16 using media::CopyYPlane;
17 using media::CopyUPlane;
18 using media::CopyVPlane;
19
20 namespace content {
21
22 RTCVideoRenderer::RTCVideoRenderer(
23 webrtc::VideoTrackInterface* video_track,
24 const base::Closure& error_cb,
25 const RepaintCB& repaint_cb)
26 : error_cb_(error_cb),
27 repaint_cb_(repaint_cb),
28 message_loop_proxy_(base::MessageLoopProxy::current()),
29 state_(kStopped),
30 video_track_(video_track) {
31 }
32
33 RTCVideoRenderer::~RTCVideoRenderer() {
34 }
35
36 void RTCVideoRenderer::Start() {
37 DCHECK(message_loop_proxy_->BelongsToCurrentThread());
38 DCHECK_EQ(state_, kStopped);
39
40 if (video_track_)
41 video_track_->AddRenderer(this);
42 state_ = kStarted;
43 }
44
45 void RTCVideoRenderer::Stop() {
46 DCHECK(message_loop_proxy_->BelongsToCurrentThread());
47 if (video_track_) {
48 state_ = kStopped;
49 video_track_->RemoveRenderer(this);
50 video_track_ = NULL;
51 }
52 }
53
54 void RTCVideoRenderer::Play() {
55 DCHECK(message_loop_proxy_->BelongsToCurrentThread());
56 if (video_track_ && state_ == kPaused) {
57 state_ = kStarted;
58 }
59 }
60
61 void RTCVideoRenderer::Pause() {
62 DCHECK(message_loop_proxy_->BelongsToCurrentThread());
63 if (video_track_ && state_ == kStarted) {
64 state_ = kPaused;
65 }
66 }
67
68 void RTCVideoRenderer::SetSize(int width, int height) {
69 }
70
71 void RTCVideoRenderer::RenderFrame(const cricket::VideoFrame* frame) {
72 base::TimeDelta timestamp = base::TimeDelta::FromMilliseconds(
73 frame->GetTimeStamp() / talk_base::kNumNanosecsPerMillisec);
74 gfx::Size size(frame->GetWidth(), frame->GetHeight());
75 scoped_refptr<media::VideoFrame> video_frame =
76 media::VideoFrame::CreateFrame(media::VideoFrame::YV12,
77 size,
78 size,
79 timestamp);
80
81 // Aspect ratio unsupported; DCHECK when there are non-square pixels.
82 DCHECK_EQ(frame->GetPixelWidth(), 1u);
83 DCHECK_EQ(frame->GetPixelHeight(), 1u);
84
85 int y_rows = frame->GetHeight();
86 int uv_rows = frame->GetHeight() / 2; // YV12 format.
87 CopyYPlane(frame->GetYPlane(), frame->GetYPitch(), y_rows, video_frame);
88 CopyUPlane(frame->GetUPlane(), frame->GetUPitch(), uv_rows, video_frame);
89 CopyVPlane(frame->GetVPlane(), frame->GetVPitch(), uv_rows, video_frame);
90
91 message_loop_proxy_->PostTask(
92 FROM_HERE, base::Bind(&RTCVideoRenderer::DoRenderFrameOnMainThread,
93 this, video_frame));
94 }
95
96 void RTCVideoRenderer::DoRenderFrameOnMainThread(
97 scoped_refptr<media::VideoFrame> video_frame) {
98 DCHECK(message_loop_proxy_->BelongsToCurrentThread());
99
100 if (state_ != kStarted) {
101 return;
102 }
103
104 repaint_cb_.Run(video_frame);
105 }
106
107 } // namespace content
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