webrtc/talk/media/base/videorenderer.h
guoweis@webrtc.org 00c509ad1c Add concept of whether video renderer supports rotation.
Rotation is best done when rendered in GPU, added the shader code which rotates the frame. For renderers which don't support rotation, the rotation will be done before sending down the frame to render. By default, assume renderer can't do rotation.

Tested with peerconnection_client on windows, AppRTCDemo on Mac.

BUG=4145
R=glaznev@webrtc.org, pthatcher@webrtc.org

Committed: https://code.google.com/p/webrtc/source/detail?r=8660

Committed: https://code.google.com/p/webrtc/source/detail?r=8661

Review URL: https://webrtc-codereview.appspot.com/43569004

Cr-Commit-Position: refs/heads/master@{#8705}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8705 4adac7df-926f-26a2-2b94-8c16560cd09d
2015-03-12 21:38:19 +00:00

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2.4 KiB
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/*
* libjingle
* Copyright 2004 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_MEDIA_BASE_VIDEORENDERER_H_
#define TALK_MEDIA_BASE_VIDEORENDERER_H_
#ifdef _DEBUG
#include <string>
#endif // _DEBUG
#include "webrtc/base/sigslot.h"
namespace cricket {
class VideoFrame;
// Abstract interface for rendering VideoFrames.
class VideoRenderer {
public:
virtual ~VideoRenderer() {}
// Called when the video has changed size. This is also used as an
// initialization method to set the UI size before any video frame
// rendered. webrtc::ExternalRenderer's FrameSizeChange will invoke this when
// it's called or later when a VideoRenderer is attached.
virtual bool SetSize(int width, int height, int reserved) = 0;
// Called when a new frame is available for display.
virtual bool RenderFrame(const VideoFrame *frame) = 0;
#ifdef _DEBUG
// Allow renderer dumping out rendered frames.
virtual bool SetDumpPath(const std::string &path) { return true; }
#endif // _DEBUG
};
} // namespace cricket
#endif // TALK_MEDIA_BASE_VIDEORENDERER_H_