Stream.hpp

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#ifndef STREAM_H
#define STREAM_H
#include <fstream>
#include "Format.hpp"
#include "StreamDescription.hpp"
#include "Index.hpp"
#include "FileStream.hpp"

namespace pocolog_cpp
{

class Stream
{
    
protected:
    const StreamDescription &desc;
    Index &index;

    FileStream fileStream;
    Stream(const StreamDescription &desc, Index &index);

    bool loadSampleHeader(std::streampos pos, pocolog_cpp::SampleHeaderData& header);
    
public:
    virtual ~Stream();
    
    bool isValid() const        
    { 
        return desc.getType() != UnknownStreamType; 
    }
    
    std::string getName() const
    {
        return desc.getName();
    }

    std::string getTypeName() const
    {
        return desc.getTypeName();
    }
    
    StreamType getStreamType() const    
    { 
        return desc.getType(); 
    }
    
    const base::Time &getFistSampleTime() const
    {
        return index.getFirstSampleTime();
    }
    
    const base::Time &getLastSampleTime() const
    {
        return index.getLastSampleTime();
    }

    size_t getIndex() const       
    { 
        return desc.getIndex(); 
    }
    
    Index& getFileIndex() const       
    { 
        return index; 
    }
    
    size_t getSize() const
    {
        return index.getNumSamples();
    }
    
    bool getSampleData(std::vector<uint8_t> &result, size_t sampleNr);
    
    template<typename T>
    bool readSample(T &sample, size_t sampleNr) 
    {
        fileStream.seekg(index.getSamplePos(sampleNr));
        fileStream.read((char *) &sample, sizeof(T));
        
        return fileStream.good();
    }
    
};

}
#endif // STREAM_H