107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
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/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This sub-API supports the following functionalities:
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// - Specify render destinations for incoming video streams, capture devices
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// and files.
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// - Configuring render streams.
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#ifndef WEBRTC_VIDEO_ENGINE_MAIN_INTERFACE_VIE_RENDER_H_
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#define WEBRTC_VIDEO_ENGINE_MAIN_INTERFACE_VIE_RENDER_H_
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#include "common_types.h"
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namespace webrtc
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{
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class VideoRender;
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class VideoEngine;
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// ----------------------------------------------------------------------------
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// ExternalRenderer
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// ----------------------------------------------------------------------------
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// This class declares an abstract interface to be used for external renderers.
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// The user implemented derived class is registered using AddRenderer().
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class WEBRTC_DLLEXPORT ExternalRenderer
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{
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public:
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// This method will be called when the stream to be rendered changes in
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// resolution or number of streams mixed in the image.
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virtual int FrameSizeChange(unsigned int width, unsigned int height,
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unsigned int numberOfStreams) = 0;
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// This method is called when a new frame should be rendered.
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virtual int DeliverFrame(unsigned char* buffer, int bufferSize) = 0;
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protected:
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virtual ~ExternalRenderer() {}
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};
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// ----------------------------------------------------------------------------
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// ViERender
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// ----------------------------------------------------------------------------
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class WEBRTC_DLLEXPORT ViERender
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{
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public:
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// Factory for the ViERender sub‐API and increases an internal reference
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// counter if successful. Returns NULL if the API is not supported or if
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// construction fails.
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static ViERender* GetInterface(VideoEngine* videoEngine);
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// Releases the ViERender sub-API and decreases an internal reference
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// counter. Returns the new reference count. This value should be zero
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// for all sub-API:s before the VideoEngine object can be safely deleted.
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virtual int Release() = 0;
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// Registers render module
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virtual int RegisterVideoRenderModule(VideoRender& renderModule) = 0;
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// Deegisters render module
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virtual int DeRegisterVideoRenderModule(VideoRender& renderModule) = 0;
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// Sets the render destination for a given render ID.
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virtual int AddRenderer(const int renderId, void* window,
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const unsigned int zOrder, const float left,
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const float top, const float right,
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const float bottom) = 0;
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// Removes the renderer for a stream
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virtual int RemoveRenderer(const int renderId) = 0;
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// Starts rendering a render stream.
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virtual int StartRender(const int renderId) = 0;
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// Stops rendering a render stream.
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virtual int StopRender(const int renderId) = 0;
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// Configures an already added render stream.
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virtual int ConfigureRender(int renderId, const unsigned int zOrder,
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const float left, const float top,
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const float right, const float bottom) = 0;
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// This function mirrors the rendered stream left and right or up and down.
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virtual int MirrorRenderStream(const int renderId, const bool enable,
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const bool mirrorXAxis,
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const bool mirrorYAxis) = 0;
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// External render
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virtual int AddRenderer(const int renderId, RawVideoType videoInputFormat,
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ExternalRenderer* renderer) = 0;
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protected:
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ViERender() {};
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virtual ~ViERender() {};
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};
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} // namespace webrtc
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#endif // WEBRTC_VIDEO_ENGINE_MAIN_INTERFACE_VIE_RENDER_H_
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