opencv/modules/imgcodecs/src/grfmt_base.cpp

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#include "precomp.hpp"

#include "grfmt_base.hpp"
#include "bitstrm.hpp"
#include <opencv2/core/utils/logger.hpp>

namespace cv
{

BaseImageDecoder::BaseImageDecoder()
{
    m_width = m_height = 0;
    m_type = -1;
    m_buf_supported = false;
    m_scale_denom = 1;
    m_use_rgb = false;
    m_frame_count = 1;
}


ExifEntry_t BaseImageDecoder::getExifTag(const ExifTagName tag) const
{
    return m_exif.getTag(tag);
}
bool BaseImageDecoder::setSource( const String& filename )
{
    m_filename = filename;
    m_buf.release();
    return true;
}

bool BaseImageDecoder::setSource( const Mat& buf )
{
    if( !m_buf_supported )
        return false;
    m_filename = String();
    m_buf = buf;
    return true;
}

size_t BaseImageDecoder::signatureLength() const
{
    return m_signature.size();
}

bool BaseImageDecoder::checkSignature( const String& signature ) const
{
    size_t len = signatureLength();
    return signature.size() >= len && memcmp( signature.c_str(), m_signature.c_str(), len ) == 0;
}

int BaseImageDecoder::setScale( const int& scale_denom )
{
    int temp = m_scale_denom;
    m_scale_denom = scale_denom;
    return temp;
}

void BaseImageDecoder::setRGB(bool useRGB)
{
    m_use_rgb = useRGB;
}

ImageDecoder BaseImageDecoder::newDecoder() const
{
    return ImageDecoder();
}

BaseImageEncoder::BaseImageEncoder()
{
    m_buf = 0;
    m_buf_supported = false;
}

bool  BaseImageEncoder::isFormatSupported( int depth ) const
{
    return depth == CV_8U;
}

String BaseImageEncoder::getDescription() const
{
    return m_description;
}

bool BaseImageEncoder::setDestination( const String& filename )
{
    m_filename = filename;
    m_buf = 0;
    return true;
}

bool BaseImageEncoder::setDestination( std::vector<uchar>& buf )
{
    if( !m_buf_supported )
        return false;
    m_buf = &buf;
    m_buf->clear();
    m_filename = String();
    return true;
}

bool BaseImageEncoder::write(const Mat &img, const std::vector<int> &params) {
    std::vector<Mat> img_vec(1, img);
    return writemulti(img_vec, params);
}

bool BaseImageEncoder::writemulti(const std::vector<Mat>& img_vec, const std::vector<int>& params)
{
    if(img_vec.size() > 1)
        CV_LOG_INFO(NULL, "Multi page image will be written as animation with 1 second frame duration.");

    Animation animation;
    animation.frames = img_vec;

    for (size_t i = 0; i < animation.frames.size(); i++)
    {
        animation.durations.push_back(1000);
    }
    return writeanimation(animation, params);
}

bool BaseImageEncoder::writeanimation(const Animation&, const std::vector<int>& )
{
    CV_LOG_WARNING(NULL, "No Animation encoder for specified file extension");
    return false;
}

ImageEncoder BaseImageEncoder::newEncoder() const
{
    return ImageEncoder();
}

void BaseImageEncoder::throwOnError() const
{
    if(!m_last_error.empty())
    {
        String msg = "Raw image encoder error: " + m_last_error;
        CV_Error( Error::BadImageSize, msg.c_str() );
    }
}

}

/* End of file. */