| // Copyright (c) 2012 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. |
| |
| #include "webkit/media/simple_video_frame_provider.h" |
| |
| #include "base/bind.h" |
| #include "base/location.h" |
| #include "base/message_loop_proxy.h" |
| #include "media/base/video_frame.h" |
| |
| namespace webkit_media { |
| |
| SimpleVideoFrameProvider::SimpleVideoFrameProvider( |
| const gfx::Size& size, |
| const base::TimeDelta& frame_duration, |
| const base::Closure& error_cb, |
| const VideoFrameProvider::RepaintCB& repaint_cb) |
| : message_loop_proxy_(base::MessageLoopProxy::current()), |
| size_(size), |
| state_(kStopped), |
| frame_duration_(frame_duration), |
| error_cb_(error_cb), |
| repaint_cb_(repaint_cb) { |
| } |
| |
| SimpleVideoFrameProvider::~SimpleVideoFrameProvider() {} |
| |
| void SimpleVideoFrameProvider::Start() { |
| DVLOG(1) << "SimpleVideoFrameProvider::Start"; |
| DCHECK(message_loop_proxy_->BelongsToCurrentThread()); |
| state_ = kStarted; |
| message_loop_proxy_->PostTask( |
| FROM_HERE, |
| base::Bind(&SimpleVideoFrameProvider::GenerateFrame, this)); |
| } |
| |
| void SimpleVideoFrameProvider::Stop() { |
| DVLOG(1) << "SimpleVideoFrameProvider::Stop"; |
| DCHECK(message_loop_proxy_->BelongsToCurrentThread()); |
| state_ = kStopped; |
| } |
| |
| void SimpleVideoFrameProvider::Play() { |
| DVLOG(1) << "SimpleVideoFrameProvider::Play"; |
| DCHECK(message_loop_proxy_->BelongsToCurrentThread()); |
| if (state_ == kPaused) |
| state_ = kStarted; |
| } |
| |
| void SimpleVideoFrameProvider::Pause() { |
| DVLOG(1) << "SimpleVideoFrameProvider::Pause"; |
| DCHECK(message_loop_proxy_->BelongsToCurrentThread()); |
| if (state_ == kStarted) |
| state_ = kPaused; |
| } |
| |
| void SimpleVideoFrameProvider::GenerateFrame() { |
| DVLOG(1) << "SimpleVideoFrameProvider::GenerateFrame"; |
| DCHECK(message_loop_proxy_->BelongsToCurrentThread()); |
| if (state_ == kStopped) |
| return; |
| |
| if (state_ == kStarted) { |
| // Always allocate a new frame. |
| scoped_refptr<media::VideoFrame> video_frame = |
| media::VideoFrame::CreateFrame(media::VideoFrame::YV12, |
| size_, |
| size_, |
| current_time_); |
| |
| // TODO(wjia): set pixel data to pre-defined patterns if it's desired to |
| // verify frame content. |
| |
| repaint_cb_.Run(video_frame); |
| } |
| |
| current_time_ += frame_duration_; |
| message_loop_proxy_->PostDelayedTask( |
| FROM_HERE, |
| base::Bind(&SimpleVideoFrameProvider::GenerateFrame, this), |
| frame_duration_); |
| } |
| |
| } // namespace webkit_media |