gLib/jp2k_tool.c File Reference

JP2K TOOL with OpenJpeg-1.5. More...

#include "jp2k_tool.h"
#include "jbxl_state.h"

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Functions
void	init_jp2k (JP2KImage *jp)
void	free_jp2k (JP2KImage *jp)
void	setup_jp2k (JP2KImage *jp)
int	get_jp2k_format (uByte *buf)
JP2KImage	read_jp2k_file (const char *fname)
JP2KImage	read_jp2k_data (unsigned char *data, int len, int format)
BSGraph	jp2k_toBSGraph (JP2KImage jp)

---

Detailed Description

Version:

0.9

Date:

2014 10/19

Author:

Fumi.Iseki (C)

Attention:

this software is based on OpenJPEG. http://www.openjpeg.org/ this software does not support OpenJpeg-1.3

Definition in file jp2k_tool.c.

---

Function Documentation

void free_jp2k

(

JP2KImage *

jp

)

Definition at line 37 of file jp2k_tool.c.

References JP2KImage::image, and init_jp2k().

{
    if (jp==NULL) return;
    //
    if (jp->image!=NULL) {
        opj_image_destroy(jp->image);
    }
    init_jp2k(jp);
}

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int get_jp2k_format

(

uByte *

buf

)

JPEG 2000のヘッダからファイルの種類を返す．
ただし，ヘッダから JP2K_FMT_JPTであることは判別できないので，注意する．

Parameters:

buf

ヘッダ情報の入った変数．最低12Byte必要．

Returns:

ファイル種別 (JP2K_FMT_NONE, JP2K_FMT_JP2, JP2K_FMT_J2K)

Definition at line 112 of file jp2k_tool.c.

References JP2K_FMT_J2K, JP2K_FMT_JP2, JP2K_FMT_NONE, JP2K_MAGIC_J2K, JP2K_MAGIC_JP2, and JP2K_MAGIC_RFC3745_JP2.

Referenced by read_jp2k_file().

{
    int format = JP2K_FMT_NONE;

    if (!memcmp(buf, JP2K_MAGIC_RFC3745_JP2, 12) || !memcmp(buf, JP2K_MAGIC_JP2, 4)) {
        format = JP2K_FMT_JP2;
    }
    else if (!memcmp(buf, JP2K_MAGIC_J2K, 4)) {
        format = JP2K_FMT_J2K;
    }
    return format;
}

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void init_jp2k

(

JP2KImage *

jp

)

Definition at line 24 of file jp2k_tool.c.

References JP2KImage::cmode, JP2KImage::col, GRAPH_COLOR_RGBA, JP2KImage::image, JBXL_NORMAL, JP2KImage::state, JP2KImage::xs, and JP2KImage::ys.

Referenced by free_jp2k(), read_jp2k_data(), and read_jp2k_file().

{
    if (jp==NULL) return;
    //
    jp->xs    = 0;
    jp->ys    = 0;
    jp->col   = 0;
    jp->cmode = GRAPH_COLOR_RGBA;
    jp->state = JBXL_NORMAL;
    jp->image = NULL;
}

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BSGraph jp2k_toBSGraph

(

JP2KImage

jp

)

Definition at line 218 of file jp2k_tool.c.

References JP2KImage::col, BSGraph::gp, JP2KImage::hs, JP2KImage::image, JBXL_GRAPH_NODATA_ERROR, make_BSGraph(), BSGraph::state, JP2KImage::ws, and JP2KImage::xs.

{
    BSGraph vp;
    int i, j, k, yp, yz, zp;

    memset(&vp, 0, sizeof(BSGraph));
    if (jp.image==NULL || jp.image->comps==NULL) {
        vp.state = JBXL_GRAPH_NODATA_ERROR;
        return vp;
    }

    vp = make_BSGraph(jp.ws, jp.hs, jp.col);
    if (vp.gp==NULL) return vp;

    for (k=0; k<jp.col; k++) {
        zp = k*jp.ws*jp.hs;
        for (j=0; j<jp.hs; j++) {
            yp = j*jp.xs;
            yz = j*jp.ws + zp;
            for (i=0; i<jp.ws; i++) {
                vp.gp[yz + i] = (uByte)jp.image->comps[k].data[yp + i];  // as Byte境界
            }
        }
    }

    return vp;
}

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JP2KImage read_jp2k_data	(	unsigned char *	data,
		int	len,
		int	format
	)

Definition at line 172 of file jp2k_tool.c.

References JP2KImage::image, init_jp2k(), JBXL_GRAPH_IVDDATA_ERROR, JBXL_GRAPH_NODATA_ERROR, JP2K_FMT_J2K, JP2K_FMT_JP2, JP2K_FMT_JPT, PRINT_MESG, setup_jp2k(), and JP2KImage::state.

Referenced by read_jp2k_file().

{
    JP2KImage jp;
    init_jp2k(&jp);

    opj_dinfo_t* codec  = NULL;
    opj_cio_t*   stream = NULL;

    opj_dparameters_t parameters;   
    opj_set_default_decoder_parameters(&parameters);

    if (format==JP2K_FMT_J2K) {         // JPEG 2000 codestream
        codec = opj_create_decompress(CODEC_J2K);
    }   
    else if (format==JP2K_FMT_JP2) {    // JPEG 2000 compressed image data
        codec = opj_create_decompress(CODEC_JP2);
    }
    else if (format==JP2K_FMT_JPT) {    // JPEG 2000 JPIP
        codec = opj_create_decompress(CODEC_JPT);
    }
    else {
        PRINT_MESG("JBXL::readJPEG2KData: ERROR: unknown file format!\n");
        jp.state = JBXL_GRAPH_NODATA_ERROR;
        return jp;
    }

    opj_setup_decoder(codec, &parameters);
    stream = opj_cio_open((opj_common_ptr)codec, data, len);
    jp.image = opj_decode(codec, stream);
    if (jp.image==NULL) {
        opj_cio_close(stream);
        opj_destroy_decompress(codec);
        jp.state = JBXL_GRAPH_IVDDATA_ERROR;
        return jp;
    }

    setup_jp2k(&jp);

    opj_cio_close(stream);
    opj_destroy_decompress(codec);

    return jp;
}

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JP2KImage read_jp2k_file

(

const char *

fname

)

Definition at line 127 of file jp2k_tool.c.

References file_size(), get_jp2k_format(), init_jp2k(), JBXL_GRAPH_IVDARG_ERROR, JBXL_GRAPH_MEMORY_ERROR, JBXL_GRAPH_OPFILE_ERROR, JP2K_FMT_JPT, JP2K_FMT_NONE, read_jp2k_data(), JP2KImage::state, and UNUSED.

{
    unsigned char head[12];
    JP2KImage jp;
    size_t rs;
    UNUSED(rs);

    init_jp2k(&jp);
    //
    if (fname==NULL) {
        jp.state = JBXL_GRAPH_IVDARG_ERROR;
        return jp;
    }

    int len = (int)file_size(fname);

    FILE* fp = fopen(fname, "rb");
    if (fp==NULL) {
        jp.state = JBXL_GRAPH_OPFILE_ERROR;
        return jp;
    }

    unsigned char* data = (unsigned char*)malloc(len);
    if (data==NULL) {
        fclose(fp);
        jp.state = JBXL_GRAPH_MEMORY_ERROR;
        return jp;
    }

    rs = fread(head, 12, 1, fp);
    fseek(fp, 0, 0);
    int format = get_jp2k_format(head);
    if (format==JP2K_FMT_NONE) format = JP2K_FMT_JPT;

    rs = fread(data, len, 1, fp);
    fclose(fp);

    jp = read_jp2k_data(data, len, format);
    free(data);

    return jp;
}

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void setup_jp2k

(

JP2KImage *

jp

)

Definition at line 49 of file jp2k_tool.c.

References JP2KImage::cmode, JP2KImage::col, freeNull, GRAPH_COLOR_MONO, GRAPH_COLOR_MONO16, GRAPH_COLOR_RGB, GRAPH_COLOR_RGB16, GRAPH_COLOR_RGBA, GRAPH_COLOR_RGBA16, GRAPH_COLOR_UNKNOWN, JP2KImage::hs, JP2KImage::image, JP2KImage::ws, JP2KImage::xs, and JP2KImage::ys.

Referenced by read_jp2k_data().

{
    if (jp==NULL || jp->image==NULL || jp->image->comps==NULL) return;
    //
    jp->xs = jp->image->x1 - jp->image->x0;
    jp->ys = jp->image->y1 - jp->image->y0;

    int fac = (int)jp->image->comps->factor;
    jp->ws = (jp->xs + (1<<fac) - 1)>>fac;
    jp->hs = (jp->ys + (1<<fac) - 1)>>fac;

    jp->col = (int)jp->image->numcomps;
    if (jp->image->color_space==CLRSPC_SRGB) {
        jp->col = 3;
    }
    else if (jp->image->color_space==CLRSPC_GRAY) {
        jp->col = 1;
    }
/*
#if OPENJPEG_VER > JP2K_VER_12
    else if (jp->image->color_space==CLRSPC_UNSPECIFIED) {
        jp->col = (int)jp->image->numcomps;
    }
#endif
*/
    // 設定されないものについては，未対応
    jp->cmode = GRAPH_COLOR_UNKNOWN;
    int depth = (int)jp->image->comps->bpp;
    if (depth==0) {
        if      (jp->col==3) jp->cmode = GRAPH_COLOR_RGB;
        else if (jp->col==4) jp->cmode = GRAPH_COLOR_RGBA;
    }
    else if (depth==32) {
        if      (jp->col==3) jp->cmode = GRAPH_COLOR_RGB;
        else if (jp->col==4) jp->cmode = GRAPH_COLOR_RGBA;
    }
    else if (depth==24) {
        if      (jp->col==3) jp->cmode = GRAPH_COLOR_RGB;
    }
    else if (depth==16) {
        if      (jp->col==1) jp->cmode = GRAPH_COLOR_MONO16;
        else if (jp->col==3) jp->cmode = GRAPH_COLOR_RGB16;
        else if (jp->col==4) jp->cmode = GRAPH_COLOR_RGBA16;
    }
    else if (depth==8) {
        if      (jp->col==1) jp->cmode = GRAPH_COLOR_MONO;
    }

#if OPENJPEG_VER > JP2K_VER_12
    freeNull(jp->image->icc_profile_buf);
    jp->image->icc_profile_len = 0;
#endif
}

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