opencv/modules/imgcodecs/src/grfmt_base.hpp

127 lines
4.3 KiB
C++

/*M///////////////////////////////////////////////////////////////////////////////////////
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#ifndef _GRFMT_BASE_H_
#define _GRFMT_BASE_H_
#include "utils.hpp"
#include "bitstrm.hpp"
#include "exif.hpp"
namespace cv
{
class BaseImageDecoder;
class BaseImageEncoder;
typedef Ptr<BaseImageEncoder> ImageEncoder;
typedef Ptr<BaseImageDecoder> ImageDecoder;
///////////////////////////////// base class for decoders ////////////////////////
class BaseImageDecoder
{
public:
BaseImageDecoder();
virtual ~BaseImageDecoder() {}
int width() const { return m_width; }
int height() const { return m_height; }
virtual int type() const { return m_type; }
ExifEntry_t getExifTag(const ExifTagName tag) const;
virtual bool setSource( const String& filename );
virtual bool setSource( const Mat& buf );
virtual int setScale( const int& scale_denom );
virtual bool readHeader() = 0;
virtual bool readData( Mat& img ) = 0;
/// Called after readData to advance to the next page, if any.
virtual bool nextPage() { return false; }
virtual size_t signatureLength() const;
virtual bool checkSignature( const String& signature ) const;
virtual ImageDecoder newDecoder() const;
protected:
int m_width; // width of the image ( filled by readHeader )
int m_height; // height of the image ( filled by readHeader )
int m_type;
int m_scale_denom;
String m_filename;
String m_signature;
Mat m_buf;
bool m_buf_supported;
ExifReader m_exif;
};
///////////////////////////// base class for encoders ////////////////////////////
class BaseImageEncoder
{
public:
BaseImageEncoder();
virtual ~BaseImageEncoder() {}
virtual bool isFormatSupported( int depth ) const;
virtual bool setDestination( const String& filename );
virtual bool setDestination( std::vector<uchar>& buf );
virtual bool write( const Mat& img, const std::vector<int>& params ) = 0;
virtual bool writemulti(const std::vector<Mat>& img_vec, const std::vector<int>& params);
virtual String getDescription() const;
virtual ImageEncoder newEncoder() const;
virtual void throwOnEror() const;
protected:
String m_description;
String m_filename;
std::vector<uchar>* m_buf;
bool m_buf_supported;
String m_last_error;
};
}
#endif/*_GRFMT_BASE_H_*/