// Copyright (c) 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.
#ifndef CONTENT_RENDERER_MEDIA_WEBRTC_VIDEO_DESTINATION_HANDLER_H_
#define CONTENT_RENDERER_MEDIA_WEBRTC_VIDEO_DESTINATION_HANDLER_H_
#include <string>
#include <vector>
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "content/common/content_export.h"
#include "content/renderer/media/media_stream_video_source.h"
#include "media/base/video_frame_pool.h"
namespace content {
class MediaStreamDependencyFactory;
class MediaStreamRegistryInterface;
class PPB_ImageData_Impl;
// Interface used by the effects pepper plugin to output the processed frame
// to the video track.
class CONTENT_EXPORT FrameWriterInterface {
public:
// The ownership of the |image_data| deosn't transfer. So the implementation
// of this interface should make a copy of the |image_data| before return.
virtual void PutFrame(PPB_ImageData_Impl* image_data,
int64 time_stamp_ns) = 0;
virtual ~FrameWriterInterface() {}
};
// PpFrameWriter implements MediaStreamVideoSource and can therefore provide
// video frames to MediaStreamVideoTracks. It also implements
// FrameWriterInterface, which will be used by the effects pepper plugin to
// inject the processed frame.
class CONTENT_EXPORT PpFrameWriter
: NON_EXPORTED_BASE(public MediaStreamVideoSource),
public FrameWriterInterface,
NON_EXPORTED_BASE(public base::SupportsWeakPtr<PpFrameWriter>) {
public:
explicit PpFrameWriter(MediaStreamDependencyFactory* factory);
virtual ~PpFrameWriter();
// FrameWriterInterface implementation.
// This method will be called by the Pepper host from render thread.
virtual void PutFrame(PPB_ImageData_Impl* image_data,
int64 time_stamp_ns) OVERRIDE;
protected:
// MediaStreamVideoSource implementation.
virtual void GetCurrentSupportedFormats(int max_requested_width,
int max_requested_height) OVERRIDE;
virtual void StartSourceImpl(
const media::VideoCaptureParams& params) OVERRIDE;
virtual void StopSourceImpl() OVERRIDE;
private:
// |format_| is the format currently received by this source.
media::VideoCaptureFormat format_;
bool first_frame_received_;
media::VideoFramePool frame_pool_;
DISALLOW_COPY_AND_ASSIGN(PpFrameWriter);
};
// VideoDestinationHandler is a glue class between the content MediaStream and
// the effects pepper plugin host.
class CONTENT_EXPORT VideoDestinationHandler {
public:
// Instantiates and adds a new video track to the MediaStream specified by
// |url|. Returns a handler for delivering frames to the new video track as
// |frame_writer|.
// If |factory| is NULL the MediaStreamDependencyFactory owned by
// RenderThreadImpl::current() will be used.
// If |registry| is NULL the global blink::WebMediaStreamRegistry will be
// used to look up the media stream.
// The caller of the function takes the ownership of |frame_writer|.
// Returns true on success and false on failure.
static bool Open(MediaStreamDependencyFactory* factory,
MediaStreamRegistryInterface* registry,
const std::string& url,
FrameWriterInterface** frame_writer);
private:
DISALLOW_COPY_AND_ASSIGN(VideoDestinationHandler);
};
} // namespace content
#endif // CONTENT_RENDERER_MEDIA_VIDEO_DESTINATION_HANDLER_H_