gstBufferManager.h

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/*
 * Copyright (c) 2021, 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
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#ifndef __GSTREAMER_BUFFER_MANAGER_H__
#define __GSTREAMER_BUFFER_MANAGER_H__
 
#include "gstUtility.h"
#include "imageFormat.h"
#include "videoOptions.h"
#include "Event.h"
#include "Mutex.h"
#include "RingBuffer.h"
 
 
#ifdef ENABLE_NVMM
#if !GST_CHECK_VERSION(1,0,0)
        #undef ENABLE_NVMM      // NVMM is only enabled for GStreamer 1.0 and newer
#endif
 
#include "NvInfer.h"
#if NV_TENSORRT_MAJOR > 8 || (NV_TENSORRT_MAJOR == 8 && NV_TENSORRT_MINOR >= 4)
        #undef ENABLE_NVMM  // debug NVMM under JetPack 5
#endif
#endif
 
#define GST_CAPS_FEATURE_MEMORY_NVMM "memory:NVMM"
 
 
class gstBufferManager
{
public:
        gstBufferManager( videoOptions* options );
        
        ~gstBufferManager();
        
        bool Enqueue( GstBuffer* buffer, GstCaps* caps );
        
        int Dequeue( void** output, imageFormat format, uint64_t timeout=UINT64_MAX );
 
        uint64_t GetLastTimestamp() const { return mLastTimestamp; }
 
        inline imageFormat GetRawFormat() const { return mFormatYUV; }
 
        inline uint64_t GetFrameCount() const   { return mFrameCount; }
        
protected:
 
        imageFormat   mFormatYUV;  
        RingBuffer    mBufferYUV;  
        RingBuffer    mTimestamps; 
        RingBuffer    mBufferRGB;  
        uint64_t      mLastTimestamp;  
        Event         mWaitEvent;  
        videoOptions* mOptions;    
        uint64_t          mFrameCount; 
        bool          mNvmmUsed;   
#ifdef ENABLE_NVMM
        Mutex  mNvmmMutex;
        int    mNvmmFD;
        void*  mNvmmEGL;
        void*  mNvmmCUDA;
        size_t mNvmmSize;
        bool   mNvmmReleaseFD;
#endif
};
  
#endif