void create_raw_chunk(IFFByteStream &iff, const GUTF8String &chkid, const GURL &url) { iff.put_chunk(chkid); GP<ByteStream> ibs=ByteStream::create(url,"rb"); iff.copy(*ibs); iff.close_chunk(); }
void create_jb2_chunk(IFFByteStream &iff, const char *chkid, const GURL &url) { analyze_jb2_chunk(url); g().jb2stencil->seek(0); iff.put_chunk(chkid); iff.copy(*g().jb2stencil); iff.close_chunk(); }
void create_fg44_chunk(IFFByteStream &iff, const char *ckid, const GURL &url) { GP<ByteStream> gbs=ByteStream::create(url,"rb"); GP<IFFByteStream> gbsi=IFFByteStream::create(gbs); IFFByteStream &bsi=*gbsi; GUTF8String chkid; bsi.get_chunk(chkid); if (chkid != "FORM:PM44" && chkid != "FORM:BM44") G_THROW("djvumake: FG44 file has incorrect format (wrong IFF header)"); bsi.get_chunk(chkid); if (chkid!="PM44" && chkid!="BM44") G_THROW("djvumake: FG44 file has incorrect format (wring IFF header)"); GP<ByteStream> gmbs=ByteStream::create(); ByteStream &mbs=*gmbs; mbs.copy(*bsi.get_bytestream()); bsi.close_chunk(); if (bsi.get_chunk(chkid)) DjVuPrintErrorUTF8("%s","djvumake: FG44 file contains more than one chunk\n"); bsi.close_chunk(); mbs.seek(0); if (mbs.readall((void*)&primary, sizeof(primary)) != sizeof(primary)) G_THROW("djvumake: FG44 file is corrupted (cannot read primary header)"); if (primary.serial != 0) G_THROW("djvumake: FG44 file is corrupted (wrong serial number)"); if (mbs.readall((void*)&secondary, sizeof(secondary)) != sizeof(secondary)) G_THROW("djvumake: FG44 file is corrupted (cannot read secondary header)"); int iw = (secondary.xhi<<8) + secondary.xlo; int ih = (secondary.yhi<<8) + secondary.ylo; int red; for (red=1; red<=12; red++) if (iw==(w+red-1)/red && ih==(h+red-1)/red) break; flag_contains_fg = red; if (red>12) DjVuPrintErrorUTF8("%s","djvumake: FG44 subsampling is not in [1..12] range\n"); mbs.seek(0); iff.put_chunk(ckid); iff.copy(mbs); iff.close_chunk(); }
void create_bg44_chunk(IFFByteStream &iff, const char *ckid, GUTF8String filespec) { static GP<IFFByteStream> bg44iff; if (! bg44iff) { if (flag_contains_bg) DjVuPrintErrorUTF8("%s","djvumake: Duplicate BGxx chunk\n"); int i=filespec.rsearch(':'); for (int j=i+1; i>0 && j<(int)filespec.length(); j++) if (filespec[j] < '0' || filespec[j] > '9') i = -1; if (!i) G_THROW("djvumake: no filename specified in first BG44 specification"); GUTF8String filename=(i<0)?filespec:GUTF8String(filespec, i); const GURL::Filename::UTF8 url(filename); const GP<ByteStream> gbs(ByteStream::create(url,"rb")); if(!gbs) { G_THROW("djvumake: no such file as"+filename); } bg44iff = IFFByteStream::create(gbs); GUTF8String chkid; bg44iff->get_chunk(chkid); if (chkid != "FORM:PM44" && chkid != "FORM:BM44") G_THROW("djvumake: BG44 file has incorrect format (wrong IFF header)"); if (i>=0) filespec = i+1+(const char *)filespec; else filespec = "99"; } else { if (filespec.length() && filespec[0]!=':') G_THROW("djvumake: filename specified in BG44 refinement"); filespec = 1+(const char *)filespec; } const char *s=filespec; int nchunks = strtol((char *)s, (char **)&s, 10); if (nchunks<1 || nchunks>99) G_THROW("djvumake: invalid number of chunks in BG44 specification"); if (*s) G_THROW("djvumake: invalid BG44 specification (syntax error)"); int flag = (nchunks>=99); GUTF8String chkid; while (nchunks-->0 && bg44iff->get_chunk(chkid)) { if (chkid!="PM44" && chkid!="BM44") { DjVuPrintErrorUTF8("%s","djvumake: BG44 file contains unrecognized chunks (fixed)\n"); nchunks += 1; bg44iff->close_chunk(); continue; } GP<ByteStream> gmbs=ByteStream::create(); ByteStream &mbs=*gmbs; mbs.copy(*(bg44iff->get_bytestream())); bg44iff->close_chunk(); mbs.seek(0); if (mbs.readall((void*)&primary, sizeof(primary)) != sizeof(primary)) G_THROW("djvumake: BG44 file is corrupted (cannot read primary header)\n"); if (primary.serial == 0) { if (mbs.readall((void*)&secondary, sizeof(secondary)) != sizeof(secondary)) G_THROW("djvumake: BG44 file is corrupted (cannot read secondary header)\n"); int iw = (secondary.xhi<<8) + secondary.xlo; int ih = (secondary.yhi<<8) + secondary.ylo; int red; for (red=1; red<=12; red++) if (iw==(w+red-1)/red && ih==(h+red-1)/red) break; flag_contains_bg = red; if (red>12) DjVuPrintErrorUTF8("%s","djvumake: BG44 subsampling is not in [1..12] range\n"); } mbs.seek(0); iff.put_chunk(ckid); iff.copy(mbs); iff.close_chunk(); flag = 1; } if (!flag) DjVuPrintErrorUTF8("%s","djvumake: no more chunks in BG44 file\n"); }