blob: b1dda9c46fa42c59f371efc1e966906642c5a68f [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/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "content/common/content_export.h"
#include "content/common/media/video_capture.h"
#include "content/public/renderer/media_stream_sink.h"
#include "media/base/video_capturer_source.h"
namespace blink {
class WebMediaStreamTrack;
namespace content {
// MediaStreamVideoSink is an interface used for receiving video frames from a
// Video Stream Track or a Video Source.
// All methods calls will be done from the main render thread.
class CONTENT_EXPORT MediaStreamVideoSink : public MediaStreamSink {
// An implementation of MediaStreamVideoSink should call AddToVideoTrack when
// it is ready to receive data from a video track. Before the implementation
// is destroyed, RemoveFromVideoTrack must be called.
// Calls to these methods must be done on the main render thread.
// Note that |callback| for frame delivery happens on the IO thread.
// Calling RemoveFromVideoTrack also not stop frame delivery through the
// callback immediately because it may happen on another thread.
// The added callback will be reset on the render thread.
static void AddToVideoTrack(MediaStreamVideoSink* sink,
const VideoCaptureDeliverFrameCB& callback,
const blink::WebMediaStreamTrack& track);
static void RemoveFromVideoTrack(MediaStreamVideoSink* sink,
const blink::WebMediaStreamTrack& track);
~MediaStreamVideoSink() override {}
} // namespace content