imageLoader.h

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/*
 * Copyright (c) 2020, 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
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 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef __IMAGE_LOADER_H_
#define __IMAGE_LOADER_H_


#include "videoSource.h"

#include <string>
#include <vector>


class imageLoader : public videoSource
{
public:
        static imageLoader* Create( const char* path, const videoOptions& options=videoOptions() );
        
        static imageLoader* Create( const videoOptions& options );

        virtual ~imageLoader();

        template<typename T> bool Capture( T** image, uint64_t timeout=UINT64_MAX )             { return Capture((void**)image, imageFormatFromType<T>(), timeout); }
        
        virtual bool Capture( void** image, imageFormat format, uint64_t timeout=UINT64_MAX );

        virtual bool Open();

        virtual void Close();

        inline bool IsEOS() const                               { return mEOS; }

        virtual inline uint32_t GetType() const         { return Type; }

        static const uint32_t Type = (1 << 4);

        static const char* SupportedExtensions[];

        static bool IsSupportedExtension( const char* ext );

protected:
        imageLoader( const videoOptions& options );

        inline bool isLooping() const { return (mOptions.loop < 0) || ((mOptions.loop > 0) && (mLoopCount < mOptions.loop)); }

        bool mEOS;
        size_t mLoopCount;
        size_t mNextFile;
        
        std::vector<std::string> mFiles;
        std::vector<void*> mBuffers;
};

#endif