commit fc2f142a02125b0f72dcce3eb14cf98b1eaa89aa
parent e2ec7235a685ebc687a30e68a35c20d7749bf425
Author: Christian Grothoff <christian@grothoff.org>
Date: Thu, 14 Jul 2005 19:48:48 +0000
API updates
Diffstat:
15 files changed, 386 insertions(+), 419 deletions(-)
diff --git a/doc/libextractor.3 b/doc/libextractor.3
@@ -1,6 +1,6 @@
-.TH LIBEXTRACTOR 3 "Apr 5, 2005"
+.TH LIBEXTRACTOR 3 "Jul 14, 2005"
.SH NAME
-libextractor \- meta\-information extraction library 0.5.0
+libextractor \- meta\-information extraction library 0.5.2
.SH SYNOPSIS
\fB#include <extractor.h>
@@ -28,6 +28,8 @@ libextractor \- meta\-information extraction library 0.5.0
\fBEXTRACTOR_KeywordList * EXTRACTOR_getKeywords (EXTRACTOR_ExtractorList * \fIextractor\fB, const char * \fIfilename\fB);
+ \fBEXTRACTOR_KeywordList * EXTRACTOR_getKeywords (EXTRACTOR_ExtractorList * \fIextractor\fB, const char * \fIdata\fB, size_t \fIsize\fB);
+
\fBEXTRACTOR_KeywordList * EXTRACTOR_removeEmptyKeywords (EXTRACTOR_KeywordList * \fIlist\fB);
\fBEXTRACTOR_KeywordList * EXTRACTOR_removeDuplicateKeywords (EXTRACTOR_KeywordList * \fIlist\fB, const unsigned int \fIoptions\fB);
diff --git a/src/include/extractor.h b/src/include/extractor.h
@@ -161,6 +161,9 @@ typedef struct EXTRACTOR_Keywords {
/**
* Signature of the extract method that each plugin
* must provide.
+ *
+ * @param filename MAYBE NULL (!)
+ * @param data must not be modified (!)
*/
typedef EXTRACTOR_KeywordList *
(*ExtractMethod)(const char * filename,
@@ -273,6 +276,22 @@ EXTRACTOR_getKeywords(EXTRACTOR_ExtractorList * extractor,
/**
+ * Extract keywords from a buffer in memory
+ * using the available extractors.
+ *
+ * @param extractor the list of extractor libraries
+ * @param data the data of the file
+ * @param size the number of bytes in data
+ * @return the list of keywords found in the file, NULL if none
+ * were found (or other errors)
+ */
+EXTRACTOR_KeywordList *
+EXTRACTOR_getKeywords2(EXTRACTOR_ExtractorList * extractor,
+ const char * data,
+ size_t size);
+
+
+/**
* Remove duplicate keywords from the list.
* @param list the original keyword list (destroyed in the process!)
* @param options a set of options (DUPLICATES_XXXX)
@@ -339,6 +358,31 @@ const char * EXTRACTOR_extractLastByString(const char * type,
unsigned int EXTRACTOR_countKeywords(EXTRACTOR_KeywordList * keywords);
+/**
+ * This function can be used to decode the binary data
+ * encoded in the libextractor metadata (i.e. for
+ * the thumbnails).
+ *
+ * @param in 0-terminated string from the meta-data
+ * @return 1 on error, 0 on success
+ */
+int EXTRACTOR_binaryDecode(const unsigned char * in,
+ unsigned char ** out,
+ size_t * outSize);
+
+
+/**
+ * Encode the given binary data object
+ * as a 0-terminated C-string according
+ * to the LE binary data encoding standard.
+ *
+ * @return NULL on error, the 0-terminated
+ * encoding otherwise
+ */
+char * EXTRACTOR_binaryEncode(const char * data,
+ size_t size);
+
+
#ifdef __cplusplus
}
#endif
diff --git a/src/include/plibc.h b/src/include/plibc.h
@@ -1,20 +1,20 @@
/*
- This file is part of PlibC.
- (C) 2005 Nils Durner (and other contributing authors)
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
+ This file is part of PlibC.
+ (C) 2005 Nils Durner (and other contributing authors)
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
diff --git a/src/main/extractor.c b/src/main/extractor.c
@@ -647,8 +647,11 @@ EXTRACTOR_getKeywords (EXTRACTOR_ExtractorList * extractor,
return NULL;
result = NULL;
while (extractor != NULL) {
- result = extractor->extractMethod (filename, buffer, size, result,
- extractor->options);
+ result = extractor->extractMethod(filename,
+ buffer,
+ size,
+ result,
+ extractor->options);
extractor = extractor->next;
}
if (size > 0)
@@ -903,4 +906,110 @@ EXTRACTOR_countKeywords (EXTRACTOR_KeywordList * keywords)
return count;
}
+/**
+ * Encode the given binary data object
+ * as a 0-terminated C-string according
+ * to the LE binary data encoding standard.
+ *
+ * @return NULL on error, the 0-terminated
+ * encoding otherwise
+ */
+char * EXTRACTOR_binaryEncode(const char * data,
+ size_t size) {
+
+ char * binary;
+ size_t pos;
+ size_t end;
+ size_t wpos;
+ size_t i;
+ unsigned int markers[8]; /* 256 bits */
+ unsigned char marker;
+ char * format;
+
+ /* encode! */
+ binary = malloc(2 + size + (size+256) / 254);
+ if (binary == NULL)
+ return NULL;
+
+ pos = 0;
+ wpos = 0;
+ while (pos < size) {
+ /* find unused value between 1 and 255 in
+ the next 254 bytes */
+ end = pos + 254;
+ if (end < pos)
+ break; /* integer overflow! */
+ if (end > size)
+ end = size;
+ memset(markers,
+ 0,
+ sizeof(markers));
+ for (i=pos;i<end;i++)
+ markers[data[i]&7] |= 1 << (data[i] >> 3);
+ marker = 1;
+ while (markers[marker&7] & (1 << (marker >> 3))) {
+ marker++;
+ if (marker == 0) {
+ /* assertion failed... */
+ free(binary);
+ return NULL;
+ }
+ }
+ /* recode */
+ binary[wpos++] = marker;
+ for (i=pos;i<end;i++)
+ binary[wpos++] = data[i] == 0 ? marker : data[i];
+ pos = end;
+ }
+ binary[wpos++] = 0; /* 0-termination! */
+ return binary;
+}
+
+
+/**
+ * This function can be used to decode the binary data
+ * encoded in the libextractor metadata (i.e. for
+ * the thumbnails).
+ *
+ * @param in 0-terminated string from the meta-data
+ * @return 1 on error, 0 on success
+ */
+int EXTRACTOR_binaryDecode(const unsigned char * in,
+ unsigned char ** out,
+ size_t * outSize) {
+ unsigned char * buf;
+ size_t pos;
+ size_t wpos;
+ unsigned char marker;
+ size_t i;
+ size_t end;
+ size_t inSize;
+
+ inSize = strlen(in);
+ if (inSize == 0) {
+ *out = NULL;
+ *outSize = 0;
+ return 1;
+ }
+
+ buf = malloc(inSize); /* slightly more than needed ;-) */
+ *out = buf;
+
+ pos = 0;
+ wpos = 0;
+ while (pos < inSize) {
+ end = pos + 255; /* 255 here: count the marker! */
+ if (end > inSize)
+ end = inSize;
+ marker = in[pos++];
+ for (i=pos;i<end;i++)
+ buf[wpos++] = (in[i] == marker) ? 0 : in[i];
+ pos = end;
+ }
+ *outSize = wpos;
+ return 0;
+}
+
+
+
/* end of extractor.c */
diff --git a/src/plugins/exiv2/exiv2extractor.cc b/src/plugins/exiv2/exiv2extractor.cc
@@ -83,7 +83,7 @@ struct EXTRACTOR_Keywords * addExiv2Tag(const Exiv2::ExifData& exifData,
extern "C" {
- struct EXTRACTOR_Keywords * libextractor_exiv2_extract(char * filename,
+ struct EXTRACTOR_Keywords * libextractor_exiv2_extract(const char * filename,
unsigned char * data,
size_t size,
struct EXTRACTOR_Keywords * prev)
@@ -91,11 +91,8 @@ extern "C" {
struct EXTRACTOR_Keywords * result = 0;
try {
- if (!Exiv2::fileExists(filename, true)) return result;
-
-
- Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(filename);
+ Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(data, size);
assert(image.get() != 0);
image->readMetadata();
Exiv2::ExifData &exifData = image->exifData();
diff --git a/src/plugins/filenameextractor.c b/src/plugins/filenameextractor.c
@@ -24,14 +24,17 @@
/* "extract" the 'filename' as a keyword */
-struct EXTRACTOR_Keywords * libextractor_filename_extract(const char * filename,
- char * date,
- size_t size,
- struct EXTRACTOR_Keywords * prev) {
+struct EXTRACTOR_Keywords *
+libextractor_filename_extract(const char * filename,
+ char * date,
+ size_t size,
+ struct EXTRACTOR_Keywords * prev) {
EXTRACTOR_KeywordList * keyword;
const char * filenameRoot = filename;
int res;
+ if (filename == NULL)
+ return prev;
for (res=strlen(filename)-1;res>=0;res--)
if (filename[res] == DIR_SEPARATOR) {
filenameRoot = &filename[res+1];
@@ -41,8 +44,7 @@ struct EXTRACTOR_Keywords * libextractor_filename_extract(const char * filename,
keyword->next = prev;
keyword->keyword = convertToUtf8(filenameRoot,
strlen(filenameRoot),
- nl_langinfo(CODESET)
- );
+ nl_langinfo(CODESET));
keyword->keywordType = EXTRACTOR_FILENAME;
return keyword;
}
diff --git a/src/plugins/manextractor.c b/src/plugins/manextractor.c
@@ -203,31 +203,63 @@ static struct EXTRACTOR_Keywords * tryParse(const char * buf,
return prev;
}
+static voidpf Emalloc(voidpf opaque, uInt items, uInt size) {
+ return malloc(size * items);
+}
+
+static void Efree(voidpf opaque, voidpf ptr) {
+ free(ptr);
+}
+
/**
* How many bytes do we actually try to scan? (from the beginning
* of the file).
*/
#define MAX_READ 2048
-struct EXTRACTOR_Keywords * libextractor_man_extract(const char * filename,
- char * data,
- size_t size,
- struct EXTRACTOR_Keywords * prev) {
- gzFile gz;
+struct EXTRACTOR_Keywords *
+libextractor_man_extract(const char * filename,
+ char * data,
+ size_t size,
+ struct EXTRACTOR_Keywords * prev) {
+ z_stream strm;
char * buf;
int len;
- gz = gzopen(filename, "rb");
- buf = malloc(MAX_READ);
- len = gzread(gz, buf, MAX_READ);
- if (len < 0) {
+ memset(&strm,
+ 0,
+ sizeof(z_stream));
+ strm.next_in = (char*) data;
+ strm.avail_in = size;
+ strm.total_in = 0;
+ strm.zalloc = &Emalloc;
+ strm.zfree = &Efree;
+ strm.opaque = NULL;
+ if (Z_OK == inflateInit2(&strm,
+ 15 + 32)) {
+ buf = malloc(MAX_READ);
+ if (buf == NULL) {
+ inflateEnd(&strm);
+ return prev;
+ }
+ strm.next_out = buf;
+ strm.avail_out = MAX_READ;
+ inflate(&strm,
+ Z_FINISH);
+ if (strm.total_out > 0) {
+ prev = tryParse(buf,
+ strm.total_out,
+ prev);
+ inflateEnd(&strm);
+ free(buf);
+ return prev;
+ }
free(buf);
- gzclose(gz);
- return prev;
- }
- gzclose(gz);
- prev = tryParse(buf, len, prev);
- free(buf);
- return prev;
+ inflateEnd(&strm);
+ }
+ return tryParse(data,
+ size,
+ prev);
}
+/* end of manextractor.c */
diff --git a/src/plugins/mp3extractor.c b/src/plugins/mp3extractor.c
@@ -435,7 +435,7 @@ mp3parse(char * data,
/* mimetype = audio/mpeg */
struct EXTRACTOR_Keywords *
-libextractor_mp3_extract(char * filename,
+libextractor_mp3_extract(const char * filename,
char * data,
size_t size,
struct EXTRACTOR_Keywords * klist) {
diff --git a/src/plugins/oggextractor.c b/src/plugins/oggextractor.c
@@ -74,7 +74,7 @@ static long tellError(void * datasource) {
}
/* mimetype = application/ogg */
-struct EXTRACTOR_Keywords * libextractor_ogg_extract(char * filename,
+struct EXTRACTOR_Keywords * libextractor_ogg_extract(const char * filename,
char * data,
size_t size,
struct EXTRACTOR_Keywords * prev) {
@@ -94,20 +94,12 @@ struct EXTRACTOR_Keywords * libextractor_ogg_extract(char * filename,
callbacks.close_func = &closeOk;
callbacks.tell_func = &tellError;
if (0 != ov_open_callbacks(NULL, &vf, data, size, callbacks)) {
-#if DEBUG_EXTRACT_OGG
- fprintf(stderr,"\nError opening file %s as ogg\n",filename);
-#endif
ov_clear(&vf);
return prev;
}
comments = ov_comment(&vf, -1);
if (NULL == comments) {
-#if DEBUG_EXTRACT_OGG
- fprintf(stderr,
- "\nError decoding ogg information of %s, ignoring.\n",
- filename);
-#endif
ov_clear(&vf);
return prev;
}
diff --git a/src/plugins/ole2/ole2extractor.c b/src/plugins/ole2/ole2extractor.c
@@ -44,9 +44,10 @@ void __attribute__ ((constructor)) ole_gobject_init(void) {
g_type_init();
}
-static struct EXTRACTOR_Keywords * addKeyword(EXTRACTOR_KeywordList *oldhead,
- const char *phrase,
- EXTRACTOR_KeywordType type) {
+static struct EXTRACTOR_Keywords *
+addKeyword(EXTRACTOR_KeywordList *oldhead,
+ const char *phrase,
+ EXTRACTOR_KeywordType type) {
EXTRACTOR_KeywordList * keyword;
if (strlen(phrase) == 0)
@@ -917,10 +918,11 @@ static struct EXTRACTOR_Keywords * processSO(GsfInput * src,
return prev;
}
-struct EXTRACTOR_Keywords * libextractor_ole2_extract(const char * filename,
- char * date,
- size_t size,
- struct EXTRACTOR_Keywords * prev) {
+struct EXTRACTOR_Keywords *
+libextractor_ole2_extract(const char * filename,
+ char * date,
+ size_t size,
+ struct EXTRACTOR_Keywords * prev) {
GsfInput *input;
GsfInfile *infile;
int i;
diff --git a/src/plugins/oo/ooextractor.c b/src/plugins/oo/ooextractor.c
@@ -21,6 +21,7 @@
#include "platform.h"
#include "extractor.h"
#include "unzip.h"
+#include "ioapi.h"
#define CASESENSITIVITY (0)
#define MAXFILENAME (256)
@@ -68,11 +69,85 @@ static Matches tmap[] = {
{ NULL, 0 },
};
+typedef struct Ecls {
+ char * data;
+ size_t size;
+ size_t pos;
+} Ecls;
-struct EXTRACTOR_Keywords * libextractor_oo_extract(const char * filename,
- char * data,
- size_t size,
- struct EXTRACTOR_Keywords * prev) {
+static voidpf Eopen_file_func (voidpf opaque,
+ const char* filename,
+ int mode) {
+ if (0 == strcmp(filename,
+ "ERROR"))
+ return opaque;
+ else
+ return NULL;
+}
+static uLong Eread_file_func(voidpf opaque,
+ voidpf stream,
+ void* buf,
+ uLong size) {
+ Ecls * e = opaque;
+ uLong ret;
+
+ ret = e->size - e->pos;
+ if (ret > size)
+ ret = size;
+ memcpy(buf,
+ e->data,
+ ret);
+ return ret;
+}
+
+static long Etell_file_func(voidpf opaque,
+ voidpf stream) {
+ Ecls * e = opaque;
+ return e->pos;
+}
+
+static long Eseek_file_func(voidpf opaque,
+ voidpf stream,
+ uLong offset,
+ int origin) {
+ Ecls * e = opaque;
+
+ switch (origin) {
+ case ZLIB_FILEFUNC_SEEK_SET:
+ e->pos = offset;
+ break;
+ case ZLIB_FILEFUNC_SEEK_END:
+ if (offset > e->size)
+ return -1;
+ e->pos = e->size - offset;
+ break;
+ case ZLIB_FILEFUNC_SEEK_CUR:
+ if (offset < - e->pos)
+ return -1;
+ e->pos += offset;
+ break;
+ default:
+ return -1;
+ }
+ return e->pos;
+}
+
+static int Eclose_file_func(voidpf opaque,
+ voidpf stream) {
+ Ecls * e = opaque;
+ return 0;
+}
+static int Etesterror_file_func(voidpf opaque,
+ voidpf stream) {
+ return 0;
+}
+
+
+struct EXTRACTOR_Keywords *
+libextractor_oo_extract(const char * filename,
+ char * data,
+ size_t size,
+ struct EXTRACTOR_Keywords * prev) {
char filename_inzip[MAXFILENAME];
unzFile uf;
unz_file_info file_info;
@@ -80,13 +155,27 @@ struct EXTRACTOR_Keywords * libextractor_oo_extract(const char * filename,
char * pbuf;
size_t buf_size;
int i;
+ zlib_filefunc_def io;
+ Ecls cls;
if (size < 100)
return prev;
if ( !( ('P'==data[0]) && ('K'==data[1]) && (0x03==data[2]) && (0x04==data[3])) )
return prev;
- uf = unzOpen(filename);
+ cls.data = data;
+ cls.size = size;
+ cls.pos = 0;
+ io.zopen_file = &Eopen_file_func;
+ io.zread_file = &Eread_file_func;
+ io.zwrite_file = NULL;
+ io.ztell_file = &Etell_file_func;
+ io.zseek_file = &Eseek_file_func;
+ io.zclose_file = &Eclose_file_func;
+ io.zerror_file = &Etesterror_file_func;
+ io.opaque = &cls;
+
+ uf = unzOpen2("ERROR", &io);
if (uf == NULL)
return prev;
diff --git a/src/plugins/psextractor.c b/src/plugins/psextractor.c
@@ -142,7 +142,7 @@ static char * blacklist[] = {
};
/* mimetype = application/postscript */
-struct EXTRACTOR_Keywords * libextractor_ps_extract(char * filename,
+struct EXTRACTOR_Keywords * libextractor_ps_extract(const char * filename,
char * data,
size_t size,
struct EXTRACTOR_Keywords * prev) {
diff --git a/src/plugins/tarextractor.c b/src/plugins/tarextractor.c
@@ -1,6 +1,6 @@
/*
This file is part of libextractor.
- (C) 2002, 2003, 2004 Vidyut Samanta and Christian Grothoff
+ (C) 2002, 2003, 2004, 2005 Vidyut Samanta and Christian Grothoff
libextractor is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
@@ -136,20 +136,29 @@ tar_extract(const char * data,
return prev;
}
+static voidpf Emalloc(voidpf opaque, uInt items, uInt size) {
+ return malloc(size * items);
+}
+
+static void Efree(voidpf opaque, voidpf ptr) {
+ free(ptr);
+}
+
/* do not decompress tar.gz files > 16 MB */
#define MAX_TGZ_SIZE 16 * 1024 * 1024
-struct EXTRACTOR_Keywords * libextractor_tar_extract(const char * filename,
- const unsigned char * data,
- size_t size,
- struct EXTRACTOR_Keywords * prev) {
+struct EXTRACTOR_Keywords *
+libextractor_tar_extract(const char * filename,
+ const unsigned char * data,
+ size_t size,
+ struct EXTRACTOR_Keywords * prev) {
if ( (data[0] == 0x1f) &&
(data[1] == 0x8b) &&
(data[2] == 0x08) ) {
time_t ctime;
char * buf;
size_t bufSize;
- gzFile gzf;
+ z_stream strm;
/* Creation time */
ctime = (((((( (unsigned int)data[7] << 8)
@@ -172,21 +181,33 @@ struct EXTRACTOR_Keywords * libextractor_tar_extract(const char * filename,
if (bufSize > MAX_TGZ_SIZE) {
return prev;
}
- gzf = gzopen(filename, "rb");
- if (gzf == NULL) {
+
+ memset(&strm, 0, sizeof(z_stream));
+ strm.next_in = (char*) data;
+ strm.avail_in = size;
+ strm.total_in = 0;
+ strm.zalloc = &Emalloc;
+ strm.zfree = &Efree;
+ strm.opaque = NULL;
+ if (Z_OK != inflateInit2(&strm,
+ 15 + 32))
return prev;
- }
buf = malloc(bufSize);
if (buf == NULL) {
- gzclose(gzf);
+ inflateEnd(&strm);
return prev;
}
- if (bufSize != gzread(gzf, buf, bufSize)) {
+ strm.next_out = buf;
+ strm.avail_out = bufSize;
+ inflate(&strm,
+ Z_FINISH);
+ if (strm.total_out == 0) {
+ inflateEnd(&strm);
free(buf);
- gzclose(gzf);
return prev;
}
- gzclose(gzf);
+ bufSize = strm.total_out;
+ inflateEnd(&strm);
prev = tar_extract(buf, bufSize, prev);
free(buf);
return prev;
diff --git a/src/plugins/thumbnail/thumbnailextractor-old.c b/src/plugins/thumbnail/thumbnailextractor-old.c
@@ -1,253 +0,0 @@
-/*
- This file is part of libextractor.
- (C) 2005 Vidyut Samanta and Christian Grothoff
-
- libextractor is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
- option) any later version.
-
- libextractor is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with libextractor; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
- */
-
-/**
- * @file thumbnailextractor.c
- * @author Christian Grothoff
- * @brief this extractor produces a binary (!) encoded
- * thumbnail of images (using imagemagick). The bottom
- * of the file includes a decoder method that can be used
- * to reproduce the 128x128 PNG thumbnails.
- */
-
-#include "platform.h"
-#include "extractor.h"
-#include <wand/magick_wand.h>
-
-#define THUMBSIZE 128
-
-static EXTRACTOR_KeywordList * addKeyword(EXTRACTOR_KeywordType type,
- char * keyword,
- EXTRACTOR_KeywordList * next) {
- EXTRACTOR_KeywordList * result;
-
- if (keyword == NULL)
- return next;
- result = malloc(sizeof(EXTRACTOR_KeywordList));
- result->next = next;
- result->keyword = keyword;
- result->keywordType = type;
- return result;
-}
-
-
-/* which mime-types maybe subjected to
- the thumbnail extractor (ImageMagick
- crashes and/or prints errors for bad
- formats, so we need to be rather
- conservative here) */
-static char * whitelist[] = {
- "image/jpeg",
- "image/gif",
- "image/miff",
- "image/mng",
- "image/png",
- "image/tiff",
- "image/x-bmp",
- "image/x-mng",
- "image/x-png",
- "image/x-xpm",
- "image/xcf",
- NULL,
-};
-
-struct EXTRACTOR_Keywords * libextractor_thumbnail_extract(const char * filename,
- const char * data,
- size_t size,
- struct EXTRACTOR_Keywords * prev) {
- MagickBooleanType status;
- MagickWand * magick_wand;
- size_t length;
- char * thumb;
- unsigned long width;
- unsigned long height;
- char * binary;
- size_t pos;
- size_t end;
- size_t wpos;
- size_t i;
- unsigned int markers[8]; /* 256 bits */
- unsigned char marker;
- const char * mime;
- int j;
-
- /* if the mime-type of the file is not whitelisted
- do not run the thumbnail extactor! */
- mime = EXTRACTOR_extractLast(EXTRACTOR_MIMETYPE,
- prev);
- if (mime == NULL)
- return prev;
- j = 0;
- while (whitelist[j] != NULL) {
- if (0 == strcmp(whitelist[j], mime))
- break;
- j++;
- }
- if (whitelist[j] == NULL)
- return prev;
-
- magick_wand = NewMagickWand();
- status = MagickReadImageBlob(magick_wand, data, size);
- if (status == MagickFalse) {
- DestroyMagickWand(magick_wand);
- return prev;
- }
- MagickResetIterator(magick_wand);
- if (MagickNextImage(magick_wand) == MagickFalse)
- return prev;
-
- height = MagickGetImageHeight(magick_wand);
- width = MagickGetImageWidth(magick_wand);
- if (height == 0)
- height = 1;
- if (width == 0)
- width = 1;
- if ( (height <= THUMBSIZE) &&
- (width <= THUMBSIZE) ) {
- DestroyMagickWand(magick_wand);
- return prev;
- }
-
-
- if (height > THUMBSIZE) {
- width = width * THUMBSIZE / height;
- height = THUMBSIZE;
- }
- if (width > THUMBSIZE) {
- height = height * THUMBSIZE / width;
- width = THUMBSIZE;
- }
- MagickResizeImage(magick_wand, height, width, LanczosFilter, 1.0);
- MagickSetImageDepth(magick_wand,
- 8);
- MagickSetImageChannelDepth(magick_wand,
- RedChannel,
- 2);
- MagickCommentImage(magick_wand, "");
- MagickSetImageChannelDepth(magick_wand,
- GreenChannel,
- 2);
- MagickSetImageChannelDepth(magick_wand,
- BlueChannel,
- 2);
- MagickSetImageChannelDepth(magick_wand,
- OpacityChannel,
- 2);
- MagickSetImageInterlaceScheme(magick_wand,
- NoInterlace);
-
- if (MagickFalse == MagickSetImageFormat(magick_wand, "png")) {
- DestroyMagickWand(magick_wand);
- return prev;
- }
- thumb = MagickGetImageBlob(magick_wand, &length);
- DestroyMagickWand(magick_wand);
- if (thumb == NULL)
- return prev;
-
-
- /* encode! */
- binary = malloc(2 + length + (length+256) / 254);
- if (binary == NULL)
- return prev;
-
- pos = 0;
- wpos = 0;
- while (pos < length) {
- /* find unused value between 1 and 255 in
- the next 254 bytes */
- end = pos + 254;
- if (end < pos)
- break; /* integer overflow! */
- if (end > length)
- end = length;
- memset(markers, 0, sizeof(markers));
- for (i=pos;i<end;i++)
- markers[thumb[i]&7] |= 1 << (thumb[i] >> 3);
- marker = 1;
- while (markers[marker&7] & (1 << (marker >> 3))) {
- marker++;
- if (marker == 0) {
- /* assertion failed... */
- free(binary);
- free(thumb);
- return prev;
- }
- }
- /* recode */
- binary[wpos++] = marker;
- for (i=pos;i<end;i++)
- binary[wpos++] = thumb[i] == 0 ? marker : thumb[i];
- pos = end;
- }
- binary[wpos++] = 0; /* 0-termination! */
- free(thumb);
- return addKeyword(EXTRACTOR_THUMBNAIL_DATA,
- binary,
- prev);
-}
-
-#if 0
-
-/**
- * This function can be used to decode the binary data
- * stream produced by the thumbnailextractor.
- *
- * @param in 0-terminated string from the meta-data
- * @return 1 on error, 0 on success
- */
-int decodeThumbnail(const unsigned char * in,
- unsigned char ** out,
- size_t * outSize) {
- unsigned char * buf;
- size_t pos;
- size_t wpos;
- unsigned char marker;
- size_t i;
- size_t end;
- size_t inSize;
-
- inSize = strlen(in);
- if (inSize == 0) {
- *out = NULL;
- *outSize = 0;
- return 1;
- }
-
- buf = malloc(inSize); /* slightly more than needed ;-) */
- *out = buf;
-
- pos = 0;
- wpos = 0;
- while (pos < inSize) {
- end = pos + 255; /* 255 here: count the marker! */
- if (end > inSize)
- end = inSize;
- marker = in[pos++];
- for (i=pos;i<end;i++)
- buf[wpos++] = (in[i] == marker) ? 0 : in[i];
- pos = end;
- }
- *outSize = wpos;
- return 0;
-}
-
-
-#endif
diff --git a/src/plugins/thumbnail/thumbnailextractor.c b/src/plugins/thumbnail/thumbnailextractor.c
@@ -79,6 +79,7 @@ struct EXTRACTOR_Keywords * libextractor_thumbnail_extract(const char * filename
const char * data,
size_t size,
struct EXTRACTOR_Keywords * prev) {
+ GdkPixbufLoader * loader;
GdkPixbuf * in;
GdkPixbuf * out;
size_t length;
@@ -112,8 +113,14 @@ struct EXTRACTOR_Keywords * libextractor_thumbnail_extract(const char * filename
if (whitelist[j] == NULL)
return prev;
- in = gdk_pixbuf_new_from_file(filename,
- &err);
+ loader = gdk_pixbuf_loader_new();
+ gdk_pixbuf_loader_write(loader,
+ data,
+ size,
+ NULL);
+ in = gdk_pixbuf_loader_get_pixbuf(loader);
+ gdk_pixbuf_loader_close(loader,
+ NULL);
if (in == NULL)
return prev;
height = gdk_pixbuf_get_height(in);
@@ -164,92 +171,15 @@ struct EXTRACTOR_Keywords * libextractor_thumbnail_extract(const char * filename
if (thumb == NULL)
return prev;
-
- /* encode! */
- binary = malloc(2 + length + (length+256) / 254);
+ binary
+ = EXTRACTOR_binaryEncode(thumb,
+ length);
+ FREE(thumb);
if (binary == NULL)
return prev;
-
- pos = 0;
- wpos = 0;
- while (pos < length) {
- /* find unused value between 1 and 255 in
- the next 254 bytes */
- end = pos + 254;
- if (end < pos)
- break; /* integer overflow! */
- if (end > length)
- end = length;
- memset(markers, 0, sizeof(markers));
- for (i=pos;i<end;i++)
- markers[thumb[i]&7] |= 1 << (thumb[i] >> 3);
- marker = 1;
- while (markers[marker&7] & (1 << (marker >> 3))) {
- marker++;
- if (marker == 0) {
- /* assertion failed... */
- free(binary);
- free(thumb);
- return prev;
- }
- }
- /* recode */
- binary[wpos++] = marker;
- for (i=pos;i<end;i++)
- binary[wpos++] = thumb[i] == 0 ? marker : thumb[i];
- pos = end;
- }
- binary[wpos++] = 0; /* 0-termination! */
- free(thumb);
return addKeyword(EXTRACTOR_THUMBNAIL_DATA,
binary,
prev);
}
-#if 0
-
-/**
- * This function can be used to decode the binary data
- * stream produced by the thumbnailextractor.
- *
- * @param in 0-terminated string from the meta-data
- * @return 1 on error, 0 on success
- */
-int decodeThumbnail(const unsigned char * in,
- unsigned char ** out,
- size_t * outSize) {
- unsigned char * buf;
- size_t pos;
- size_t wpos;
- unsigned char marker;
- size_t i;
- size_t end;
- size_t inSize;
-
- inSize = strlen(in);
- if (inSize == 0) {
- *out = NULL;
- *outSize = 0;
- return 1;
- }
-
- buf = malloc(inSize); /* slightly more than needed ;-) */
- *out = buf;
-
- pos = 0;
- wpos = 0;
- while (pos < inSize) {
- end = pos + 255; /* 255 here: count the marker! */
- if (end > inSize)
- end = inSize;
- marker = in[pos++];
- for (i=pos;i<end;i++)
- buf[wpos++] = (in[i] == marker) ? 0 : in[i];
- pos = end;
- }
- *outSize = wpos;
- return 0;
-}
-
-
-#endif
+/* end of thumbnailextractor.c */
