Created new plugin ('medadata') and element ('metadataparse') that extract metadata from images (look at bug #486659).

Original commit message from CVS:
Created new plugin ('medadata') and element ('metadataparse') that extract metadata from images (look at bug #486659).

1 files changed, 112 insertions, 0 deletions

diff --git a/ext/metadata/metadataparse.h b/ext/metadata/metadataparse.h
new file mode 100644
index 00000000..661bb31d
--- /dev/null
+++ b/ext/metadata/metadataparse.h
@@ -0,0 +1,112 @@
+/*
+ * GStreamer
+ * Copyright 2007 Edgard Lima <edgard.lima@indt.org.br>
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library 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.
+ */
+
+#ifndef __METADATAPARSE_H__
+#define __METADATAPARSE_H__
+
+#include <gst/base/gstadapter.h>
+
+#include "metadataparsejpeg.h"
+
+G_BEGIN_DECLS
+
+typedef enum _tag_ParseOption {
+  PARSE_OPT_EXIF = (1 << 0),
+  PARSE_OPT_IPTC = (1 << 1),
+  PARSE_OPT_XMP  = (1 << 2),
+  PARSE_OPT_ALL  = (1 << 3) -1
+} ParseOption;
+
+typedef enum _tag_ParseState {
+  STATE_NULL,
+  STATE_READING,
+  STATE_EXIF,
+  STATE_IPTC,
+  STATE_XMP,
+  STATE_DONE
+} ParseState;
+
+typedef enum _tag_ImageType {
+  IMG_NONE,
+  IMG_JPEG,
+  IMG_PNG
+} ImageType;
+
+
+typedef struct _tag_ParseData {
+  ParseState state;
+  ImageType  img_type;
+  ParseOption option;
+  union {
+    JpegData jpeg;
+  } format_data;
+  GstAdapter *adpt_exif;
+  GstAdapter *adpt_iptc;
+  GstAdapter *adpt_xmp;
+} ParseData;
+
+#define PARSE_DATA_IMG_TYPE(p) (p).img_type
+#define PARSE_DATA_OPTION(p) (p).option
+#define set_parse_option(p, m) do { (p).option = (p).option | (m); } while(FALSE)
+#define unset_parse_option(p, m) do { (p).option = (p).option & ~(m); } while(FALSE)
+
+extern void
+metadataparse_init(ParseData *parse_data);
+
+/*
+ * offset: number of bytes to jump (just a hint to jump a chunk)
+ * return:
+ *   -1 -> error
+ *    0 -> done
+ *    1 -> need more data
+ */
+extern int
+metadataparse_parse(ParseData *parse_data, const guint8 *buf, guint32 bufsize, guint32 * next_offset, guint32 * next_size);
+
+
+extern void
+metadataparse_dispose(ParseData *parse_data);
+
+G_END_DECLS
+
+#endif /* __METADATAPARSE_H__ */