From 6836fdea8367cdcaea53505a5a9ff93909b103d8 Mon Sep 17 00:00:00 2001 From: Edgard Lima Date: Tue, 30 Oct 2007 12:49:04 +0000 Subject: 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). --- ext/metadata/metadataparseexif.c | 129 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 ext/metadata/metadataparseexif.c (limited to 'ext/metadata/metadataparseexif.c') diff --git a/ext/metadata/metadataparseexif.c b/ext/metadata/metadataparseexif.c new file mode 100644 index 00000000..abd9f50a --- /dev/null +++ b/ext/metadata/metadataparseexif.c @@ -0,0 +1,129 @@ +/* + * GStreamer + * Copyright 2007 Edgard Lima + * + * 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" + +GST_DEBUG_CATEGORY (gst_metadata_parse_exif_debug); +#define GST_CAT_DEFAULT gst_metadata_parse_exif_debug + +#ifndef HAVE_EXIF + +void +metadataparse_exif_dump (GstAdapter * adapter) +{ + + GST_LOG ("EXIF not defined, here I should send just one tag as whole chunk"); + +} + +#else /* ifndef HAVE_EXIF */ + +#include + +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_dump (GstAdapter * adapter) +{ + const guint8 *buf; + guint32 size; + ExifData *exif = NULL; + + if (adapter == NULL || (size = gst_adapter_available (adapter)) == 0) { + goto done; + } + + 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 *) NULL /* app data */ ); + +done: + + if (exif) + exif_data_unref (exif); + + return; + +} + +static void +exif_data_foreach_content_func (ExifContent * content, void *callback_data) +{ + ExifIfd ifd = exif_content_get_ifd (content); + + 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, + callback_data); +} + +static void +exif_content_foreach_entry_func (ExifEntry * entry, void *unused) +{ + char buf[2048]; + + 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) */ -- cgit v1.2.1