jp2k_tool.c

Go to the documentation of this file.

 
#include "jp2k_tool.h"
#include "jbxl_state.h"
 
 
#ifdef  ENABLE_OPENJPEG
 
#if OPENJPEG_VER <= JP2K_VER_15
 
void  init_jp2k(JP2KImage* jp)
{
    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;
}
 
 
void  free_jp2k(JP2KImage* jp)
{
    if (jp==NULL) return;
    //
    if (jp->image!=NULL) {
        opj_image_destroy(jp->image);
    }
    init_jp2k(jp);
}
 
 
void  setup_jp2k(JP2KImage* jp)
{
    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==OPJ_CLRSPC_SRGB) {          /// 1
        jp->col = 3;
    }
    else if (jp->image->color_space==OPJ_CLRSPC_GRAY) {     /// 2
        jp->col = 1;
    }
    else if (jp->image->color_space==OPJ_CLRSPC_SYCC || jp->image->color_space==OPJ_CLRSPC_EYCC) {  /// 3, 4
        jp->col = 3;
    }
    else if (jp->image->color_space==OPJ_CLRSPC_CMYK) {     /// 5
        jp->col = 4;
    }
    */
 
    // 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;
    DEBUG_MODE PRINT_MESG("JBXL::JPEG2KIMage::setup_image: INFO: xs  = %d, ys = %d, col = %d, depth = %d\n", jp->xs, jp->ys, jp->col, depth);
    if (depth==0 || depth==8) {
        if      (jp->col==1) jp->cmode = GRAPH_COLOR_GRAY;
        else if (jp->col==3) jp->cmode = GRAPH_COLOR_RGB;
        else if (jp->col==4) jp->cmode = GRAPH_COLOR_RGBA;
    }
    if (jp->cmode==GRAPH_COLOR_UNKNOWN) {
        PRINT_MESG("JBXL::JPEG2KIMage::setup_image: unknown color mode: col = %d, depth = %d\n", jp->col, depth);
        jp->cmode = GRAPH_COLOR_RGBA;
    }
 
#if OPENJPEG_VER > JP2K_VER_12
    freeNull(jp->image->icc_profile_buf);
    jp->image->icc_profile_len = 0;
#endif
}
 
 
int  get_jp2k_format(uByte* buf)
{
    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;
}
 
 
JP2KImage  read_jp2k_file(const char* fname)
{
    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;
    }
    memset(data, 0, len);
 
    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;
}
 
 
JP2KImage  read_jp2k_data(unsigned char* data, int len, int format)
{
    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("ERROR: JBXL::readJPEG2KData: 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;
}
 
 
BSGraph  jp2k_toBSGraph(JP2KImage jp)
{
    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;
}
 
 
#endif    // OPENJPEG_VER <= JP2K_VER_15
#endif    // ENABLE_OPENJPEG