gstreamer/ext/metadata/metadataparseexif.c

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/*
* 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.
*/
#include "metadataparseexif.h"
#include "metadataparseutil.h"
GST_DEBUG_CATEGORY (gst_metadata_parse_exif_debug);
#define GST_CAT_DEFAULT gst_metadata_parse_exif_debug
#define GST_TAG_EXIF "exif"
void
metadataparse_exif_tags_register (void)
{
gst_tag_register (GST_TAG_EXIF, GST_TAG_FLAG_META,
GST_TYPE_BUFFER, GST_TAG_EXIF, "exif metadata chunk", NULL);
}
#ifndef HAVE_EXIF
void
metadataparse_exif_tag_list_add (GstTagList * taglist, GstTagMergeMode mode,
GstAdapter * adapter)
{
GST_LOG ("EXIF not defined, here I should send just one tag as whole chunk");
metadataparse_util_tag_list_add_chunk (taglist, mode, GST_TAG_EXIF, adapter);
}
#else /* ifndef HAVE_EXIF */
#include <libexif/exif-data.h>
static void
exif_data_foreach_content_func (ExifContent * content, void *callback_data);
static void exif_content_foreach_entry_func (ExifEntry * entry, void *);
void
metadataparse_exif_tag_list_add (GstTagList * taglist, GstTagMergeMode mode,
GstAdapter * adapter)
{
const guint8 *buf;
guint32 size;
ExifData *exif = NULL;
if (adapter == NULL || (size = gst_adapter_available (adapter)) == 0) {
goto done;
}
/* add chunk tag */
metadataparse_util_tag_list_add_chunk (taglist, mode, GST_TAG_EXIF, adapter);
buf = gst_adapter_peek (adapter, size);
exif = exif_data_new_from_data (buf, size);
if (exif == NULL) {
goto done;
}
exif_data_foreach_content (exif, exif_data_foreach_content_func,
(void *) taglist);
done:
if (exif)
exif_data_unref (exif);
return;
}
static void
exif_data_foreach_content_func (ExifContent * content, void *user_data)
{
ExifIfd ifd = exif_content_get_ifd (content);
GstTagList *taglist = (GstTagList *) user_data;
GST_LOG ("\n Content %p: %s (ifd=%d)", content, exif_ifd_get_name (ifd),
ifd);
exif_content_foreach_entry (content, exif_content_foreach_entry_func,
user_data);
}
static void
exif_content_foreach_entry_func (ExifEntry * entry, void *user_data)
{
char buf[2048];
GstTagList *taglist = (GstTagList *) user_data;
GST_LOG ("\n Entry %p: %s (%s)\n"
" Size, Comps: %d, %d\n"
" Value: %s\n"
" Title: %s\n"
" Description: %s\n",
entry,
exif_tag_get_name_in_ifd (entry->tag, EXIF_IFD_0),
exif_format_get_name (entry->format),
entry->size,
(int) (entry->components),
exif_entry_get_value (entry, buf, sizeof (buf)),
exif_tag_get_title_in_ifd (entry->tag, EXIF_IFD_0),
exif_tag_get_description_in_ifd (entry->tag, EXIF_IFD_0));
}
#endif /* else (ifndef HAVE_EXIF) */