JP2Converter Class Reference

#include <jp2_converter.h>

Inheritance diagram for JP2Converter:

Public Slots
virtual void	cancel ()

Public Member Functions
void	addErrorString (const std::string &str)
void	addInfoString (const std::string &str)
void	addWarningString (const std::string &str)
KisImportExportErrorCode	buildFile (const QString &filename, KisPaintLayerSP layer, const JP2ConvertOptions &options)
KisImportExportErrorCode	buildImage (const QString &filename)
KisImageWSP	image ()
	JP2Converter (KisDocument *doc)
virtual	~JP2Converter ()

Private Member Functions
KisImportExportErrorCode	decode (const QString &filename)
int	infile_format (const char *fname)

Private Attributes
std::string	err
KisDocument *	m_doc
KisImageSP	m_image
bool	m_stop
std::string	warn

Detailed Description

Definition at line 26 of file jp2_converter.h.

Constructor & Destructor Documentation

JP2Converter()

JP2Converter::JP2Converter

(

KisDocument *

doc

)

Definition at line 41 of file jp2_converter.cc.

                                           {
    m_doc = doc;
    m_stop = false;
}

References m_doc, and m_stop.

~JP2Converter()

JP2Converter::~JP2Converter ( )

virtual

Definition at line 46 of file jp2_converter.cc.

                            {
}

Member Function Documentation

addErrorString()

void JP2Converter::addErrorString

(

const std::string &

str

)

Definition at line 412 of file jp2_converter.cc.

                                                      {
    if (!err.empty())
        err += "\n";
    err += str;
}

References err.

addInfoString()

void JP2Converter::addInfoString

(

const std::string &

str

)

Definition at line 407 of file jp2_converter.cc.

                                                     {
    dbgFile
    << str.c_str();
}

References dbgFile.

addWarningString()

void JP2Converter::addWarningString

(

const std::string &

str

)

Definition at line 402 of file jp2_converter.cc.

                                                        {
    if (!warn.empty())
        warn += "\n";
    warn += str;
}

References warn.

buildFile()

KisImportExportErrorCode JP2Converter::buildFile	(	const QString &	filename,
		KisPaintLayerSP	layer,
		const JP2ConvertOptions &	options )

Definition at line 390 of file jp2_converter.cc.

                                                                 {
    (void) layer;
    (void) filename;
    (void) options;
    return ImportExportCodes::Failure;
}

References ImportExportCodes::Failure, and void().

buildImage()

KisImportExportErrorCode JP2Converter::buildImage

(

const QString &

filename

)

Definition at line 147 of file jp2_converter.cc.

                                                                         {
    KisImportExportErrorCode res = ImportExportCodes::OK;
    const QByteArray file_str = filename.toUtf8();
    opj_codec_t *l_codec = 0;
    opj_dparameters_t parameters;
    bool hasColorSpaceInfo = false;
    opj_stream_t *l_stream = NULL;
    opj_image_t *image = NULL;
    int pos = 0;
    KisHLineIteratorSP it = NULL;
    unsigned int numComponents = 0;
    unsigned int precision = 0;
    const KoColorSpace *colorSpace = 0;
    QVector<int> channelorder;
    KisPaintLayerSP layer;
    bool isSigned;
    int32_t signedCorrection = 0;
    uint32_t w=0, h=0;
 
    // decompression parameters
    opj_set_default_decoder_parameters(&parameters);
    // Determine the type
    parameters.decod_format = infile_format(file_str.constData());
    if (parameters.decod_format == -1) {
        addErrorString("Not a JPEG 2000 file.");
        res = ImportExportCodes::FileFormatIncorrect;
        goto beach;
    }
 
    // Decode the file
    /* get a decoder handle */
    switch (parameters.decod_format) {
    case J2K_CFMT: {
        l_codec = opj_create_decompress(OPJ_CODEC_J2K);
        break;
    }
    case JP2_CFMT: {
        l_codec = opj_create_decompress(OPJ_CODEC_JP2);
        hasColorSpaceInfo = true;
        break;
    }
    }
    Q_ASSERT(l_codec);
 
    opj_codec_set_threads( l_codec,QThread::idealThreadCount() );
 
    /* setup the decoder decoding parameters using user parameters */
    opj_setup_decoder(l_codec, &parameters);
 
    l_stream = opj_stream_create_default_file_stream(file_str.constData(), 1);
    if (!l_stream) {
        addErrorString("Failed to create the stream");
        res = ImportExportCodes::ErrorWhileReading;
        goto beach;
    }
 
    // Setup an event handling
    opj_set_info_handler(l_codec, info_callback, this);
    opj_set_error_handler(l_codec, error_callback, this);
    opj_set_warning_handler(l_codec, warning_callback, this);
 
    if (!opj_read_header(l_stream, l_codec, &image)) {
        addErrorString("Failed to read the header");
        res = ImportExportCodes::ErrorWhileReading;
        goto beach;
    }
 
    /* Get the decoded image */
    if (!(opj_decode(l_codec, l_stream, image)
            && opj_end_decompress(l_codec, l_stream))) {
        addErrorString("Failed to decode image");
        res = ImportExportCodes::ErrorWhileReading;
        goto beach;
    }
 
    // Look for the colorspace
    numComponents = image->numcomps;
    if (image->numcomps == 0) {
        addErrorString("Image must have at least one component");
        res = ImportExportCodes::Failure;
        goto beach;
    }
    precision = image->comps[0].prec;
    for (uint32_t i = 1; i < numComponents; ++i) {
        if (image->comps[i].prec != precision) {
            std::ostringstream buffer;
            buffer << "All components must have the same bit depth "
                    << precision;
            addErrorString(buffer.str());
            res = ImportExportCodes::FormatFeaturesUnsupported;
            goto beach;
        }
    }
    isSigned = false;
    for (uint32_t i = 0; i < numComponents; ++i) {
        if ((image->comps[i].dx != 1) || (image->comps[i].dy != 1)) {
            addErrorString("Sub-sampling not supported");
            res = ImportExportCodes::FormatFeaturesUnsupported;
            goto beach;
        }
        isSigned = isSigned || (image->comps[0].sgnd);
    }
    if (isSigned)
        signedCorrection = 1 << (precision - 1);
 
    dbgFile
    << "Image has " << numComponents << " numComponents and a bit depth of "
            << precision << " for color space " << image->color_space;
    channelorder = QVector<int>(numComponents);
    if (!hasColorSpaceInfo) {
        if (numComponents == 3) {
            image->color_space = OPJ_CLRSPC_SRGB;
        } else if (numComponents == 1) {
            image->color_space = OPJ_CLRSPC_GRAY;
        }
    }
    switch (image->color_space) {
    case OPJ_CLRSPC_UNKNOWN:
    case OPJ_CLRSPC_UNSPECIFIED:
        break;
    case OPJ_CLRSPC_SRGB: {
        if (precision == 16 || precision == 12) {
            colorSpace = KoColorSpaceRegistry::instance()->rgb16();
        } else if (precision == 8) {
            colorSpace = KoColorSpaceRegistry::instance()->rgb8();
        }
        if (numComponents != 3) {
            std::ostringstream buffer;
            buffer << "sRGB: number of numComponents " << numComponents
                    << " does not equal 3";
            addErrorString(buffer.str());
            res = ImportExportCodes::FormatFeaturesUnsupported;
            goto beach;
        }
        channelorder[0] = KoBgrU16Traits::red_pos;
        channelorder[1] = KoBgrU16Traits::green_pos;
        channelorder[2] = KoBgrU16Traits::blue_pos;
        break;
    }
    case OPJ_CLRSPC_GRAY: {
        if (precision == 16 || precision == 12) {
            colorSpace = KoColorSpaceRegistry::instance()->colorSpace(
                    GrayAColorModelID.id(), Integer16BitsColorDepthID.id(), "");
        } else if (precision == 8) {
            colorSpace = KoColorSpaceRegistry::instance()->colorSpace(
                    GrayAColorModelID.id(), Integer8BitsColorDepthID.id(), "");
        }
        if (numComponents != 1) {
            std::ostringstream buffer;
            buffer << "Grayscale: number of numComponents " << numComponents
                    << " greater than 1";
            addErrorString(buffer.str());
            res = ImportExportCodes::FormatFeaturesUnsupported;
            goto beach;
        }
        channelorder[0] = 0;
        break;
    }
    case OPJ_CLRSPC_SYCC:
        addErrorString("YUV color space not supported");
        res = ImportExportCodes::FormatColorSpaceUnsupported;
        goto beach;
        break;
    case OPJ_CLRSPC_EYCC:
        addErrorString("eYCC color space not supported");
        res = ImportExportCodes::FormatColorSpaceUnsupported;
        goto beach;
        break;
    case OPJ_CLRSPC_CMYK:
        addErrorString("CMYK color space not supported");
        res = ImportExportCodes::FormatColorSpaceUnsupported;
        goto beach;
        break;
    default:
        break;
    }
 
    if (!colorSpace) {
        addErrorString("No color space found for image");
        res = ImportExportCodes::FormatColorSpaceUnsupported;
        goto beach;
    }
 
    // Create the image
    w = (uint32_t)(image->x1 - image->x0);
    h = (uint32_t)(image->y1 - image->y0);
    if (m_image == 0) {
        m_image = new KisImage(m_doc->createUndoStore(), w, h,
                colorSpace, "built image");
    }
 
    // Create the layer
    layer = new KisPaintLayer(m_image, m_image->nextLayerName(),
            OPACITY_OPAQUE_U8);
    m_image->addNode(layer);
 
    // Set the data
    it = layer->paintDevice()->createHLineIteratorNG(0, 0, w);
    for (OPJ_UINT32 v = 0; v < image->y1; ++v) {
        if (precision == 16 || precision == 12) {
            do {
                quint16 *px = reinterpret_cast<quint16*>(it->rawData());
                for (uint32_t i = 0; i < numComponents; ++i) {
                    px[channelorder[i]] = image->comps[i].data[pos]
                            + signedCorrection;
                }
                colorSpace->setOpacity(it->rawData(), OPACITY_OPAQUE_U8, 1);
                ++pos;
 
            } while (it->nextPixel());
        } else if (precision == 8) {
            do {
                quint8 *px = it->rawData();
                for (uint32_t i = 0; i < numComponents; ++i) {
                    px[channelorder[i]] = image->comps[i].data[pos]
                            + signedCorrection;
                }
                colorSpace->setOpacity(px, OPACITY_OPAQUE_U8, 1);
                ++pos;
 
            } while (it->nextPixel());
        }
        it->nextRow();
    }
 
beach:
    if (l_stream)
        opj_stream_destroy(l_stream);
    if (l_codec)
        opj_destroy_codec(l_codec);
    if (image)
        opj_image_destroy(image);
    if (!err.empty())
        m_doc->setErrorMessage(i18n(err.c_str()));
    if (!warn.empty())
        m_doc->setWarningMessage(i18n(warn.c_str()));
    return res;
}

References addErrorString(), KisNodeFacade::addNode(), KoBgrTraits< quint16 >::blue_pos, KoColorSpaceRegistry::colorSpace(), KisPaintDevice::createHLineIteratorNG(), KisDocument::createUndoStore(), dbgFile, err, error_callback(), ImportExportCodes::ErrorWhileReading, ImportExportCodes::Failure, ImportExportCodes::FileFormatIncorrect, ImportExportCodes::FormatColorSpaceUnsupported, ImportExportCodes::FormatFeaturesUnsupported, GrayAColorModelID, KoBgrTraits< quint16 >::green_pos, KoID::id(), image(), infile_format(), info_callback(), KoColorSpaceRegistry::instance(), Integer16BitsColorDepthID, Integer8BitsColorDepthID, J2K_CFMT, JP2_CFMT, m_doc, m_image, KisImage::nextLayerName(), ImportExportCodes::OK, OPACITY_OPAQUE_U8, KisPaintLayer::paintDevice, KoBgrTraits< quint16 >::red_pos, KoColorSpaceRegistry::rgb16(), KoColorSpaceRegistry::rgb8(), KisDocument::setErrorMessage(), KoColorSpace::setOpacity(), KisDocument::setWarningMessage(), v, warn, and warning_callback().

cancel

void JP2Converter::cancel ( )

virtualslot

Definition at line 398 of file jp2_converter.cc.

                          {
    m_stop = true;
}

References m_stop.

decode()

KisImportExportErrorCode JP2Converter::decode ( const QString & filename )

private

image()

KisImageWSP JP2Converter::image

(

)

Retrieve the constructed image

Definition at line 386 of file jp2_converter.cc.

                                {
    return m_image;
}

References m_image.

infile_format()

int JP2Converter::infile_format ( const char * fname )

private

Definition at line 102 of file jp2_converter.cc.

                                                 {
    FILE *reader;
    const char *s, *magic_s;
    int ext_format, magic_format;
    unsigned char buf[12];
    OPJ_SIZE_T l_nb_read;
 
    reader = fopen(fname, "rb");
 
    if (reader == NULL) {
        return -2;
    }
 
    memset(buf, 0, 12);
    l_nb_read = fread(buf, 1, 12, reader);
    fclose(reader);
    if (l_nb_read != 12) {
        return -1;
    }
    ext_format = getFileFormat(fname);
    if (memcmp(buf, JP2_RFC3745_MAGIC, 12) == 0
            || memcmp(buf, JP2_MAGIC, 4) == 0) {
        magic_format = JP2_CFMT;
        magic_s = ".jp2";
    } else if (memcmp(buf, J2K_CODESTREAM_MAGIC, 4) == 0) {
        magic_format = J2K_CFMT;
        magic_s = ".j2k, .j2c, .jpc, .jpx, or .jpf";
    } else {
        return -1;
    }
 
    if (magic_format == ext_format) {
        return ext_format;
    }
 
    if (strlen(fname) >= 4) {
        s = fname + strlen(fname) - 4;
        std::ostringstream buffer;
        buffer << "The extension of this file is incorrect.\n"
            << "Found " << s << " while it should be " << magic_s << ".";
        addErrorString(buffer.str());
    }
    return magic_format;
}

References addErrorString(), getFileFormat(), J2K_CFMT, J2K_CODESTREAM_MAGIC, JP2_CFMT, JP2_MAGIC, and JP2_RFC3745_MAGIC.

Member Data Documentation

err

std::string JP2Converter::err

private

Definition at line 52 of file jp2_converter.h.

m_doc

KisDocument* JP2Converter::m_doc

private

Definition at line 50 of file jp2_converter.h.

m_image

KisImageSP JP2Converter::m_image

private

Definition at line 49 of file jp2_converter.h.

m_stop

bool JP2Converter::m_stop

private

Definition at line 51 of file jp2_converter.h.

warn

std::string JP2Converter::warn

private

Definition at line 53 of file jp2_converter.h.

---

The documentation for this class was generated from the following files:

• plugins/impex/jp2/jp2_converter.h
• plugins/impex/jp2/jp2_converter.cc