blob: 08e51da9bdac039279879575c2ef0a309872360b [file] [log] [blame]
// Copyright 2013 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 "base/callback.h"
#include "base/memory/ref_counted.h"
namespace media {
class VideoFrame;
namespace content {
// Define an interface to provide a sequence of video frames to clients.
// TODO(wjia): remove ref count.
// TODO(wjia): rename interface so it doesn't clash with cc::VideoFrameProvider.
class VideoFrameProvider
: public base::RefCountedThreadSafe<VideoFrameProvider> {
typedef base::Callback<void(const scoped_refptr<media::VideoFrame>&)>
// Start to provide video frames to the caller.
virtual void Start() = 0;
// Stop to provide video frames to the caller.
virtual void Stop() = 0;
// Resume to provide video frames to the caller after being paused.
virtual void Play() = 0;
// Put the provider in pause state and the caller will not receive video
// frames, but the provider might still generate video frames which are
// thrown away.
virtual void Pause() = 0;
friend class base::RefCountedThreadSafe<VideoFrameProvider>;
virtual ~VideoFrameProvider() {}
} // namespace content