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// 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_,
gfx::Rect(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
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