gstEncoder.h

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/*
 * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef __GSTREAMER_ENCODER_H__
#define __GSTREAMER_ENCODER_H__
 
#include "gstUtility.h"
#include "videoOutput.h"
#include "RingBuffer.h"
 
 
// Forward declarations
class RTSPServer;
class WebRTCServer;
struct WebRTCPeer;
 
 
class gstEncoder : public videoOutput
{
public:
        static gstEncoder* Create( const videoOptions& options );
 
        static gstEncoder* Create( const URI& resource, videoOptions::Codec codec );
        
        ~gstEncoder();
        
        template<typename T> bool Render( T* image, uint32_t width, uint32_t height )           { return Render((void**)image, width, height, imageFormatFromType<T>()); }
        
        virtual bool Render( void* image, uint32_t width, uint32_t height, imageFormat format );
 
        virtual bool Open();
 
        virtual void Close();
 
        inline GstPipeline* GetPipeline() const                 { return GST_PIPELINE(mPipeline); }
        
        inline WebRTCServer* GetWebRTCServer() const    { return mWebRTCServer; }
        
        virtual inline uint32_t GetType() const                 { return Type; }
 
        static const uint32_t Type = (1 << 2);
 
        static const char* SupportedExtensions[];
 
        static bool IsSupportedExtension( const char* ext );
 
protected:
        gstEncoder( const videoOptions& options );
        
        bool init();
        bool initPipeline();
        void destroyPipeline();
        
        void checkMsgBus();
        bool buildCapsStr();
        bool buildLaunchStr();
        bool encodeYUV( void* buffer, size_t size );
        
        // appsrc callbacks
        static void onNeedData( GstElement* pipeline, uint32_t size, void* user_data );
        static void onEnoughData( GstElement* pipeline, void* user_data );
 
        // WebRTC callbacks
        static void onWebsocketMessage( WebRTCPeer* peer, const char* message, size_t message_size, void* user_data );
 
        GstBus*     mBus;
        GstCaps*    mBufferCaps;
        GstElement* mAppSrc;
        GstElement* mPipeline;
        bool        mNeedData;
        
        std::string  mCapsStr;
        std::string  mLaunchStr;
 
        RingBuffer mBufferYUV;
        
        RTSPServer*   mRTSPServer;
        WebRTCServer* mWebRTCServer;
};
 
 
#endif