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21962cbffe
Original commit message from CVS: Some IPTC tags mapped.
500 lines
14 KiB
C
500 lines
14 KiB
C
/*
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* GStreamer
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* Copyright 2007 Edgard Lima <edgard.lima@indt.org.br>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "metadataparsejpeg.h"
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#include <string.h>
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#ifdef HAVE_IPTC
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#include <libiptcdata/iptc-jpeg.h>
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#endif
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static MetadataParsingReturn
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metadataparse_jpeg_reading (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, const guint32 offset, const guint8 * step_buf,
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guint8 ** next_start, guint32 * next_size);
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static MetadataParsingReturn
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metadataparse_jpeg_exif (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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#ifdef HAVE_IPTC
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static MetadataParsingReturn
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metadataparse_jpeg_iptc (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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#endif
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static MetadataParsingReturn
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metadataparse_jpeg_xmp (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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static MetadataParsingReturn
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metadataparse_jpeg_jump (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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#define READ(buf, size) ( (size)--, *((buf)++) )
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void
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metadataparse_jpeg_lazy_update (JpegParseData * jpeg_data)
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{
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/* nothing to do */
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}
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void
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metadataparse_jpeg_init (JpegParseData * jpeg_data, GstAdapter ** exif_adpt,
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GstAdapter ** iptc_adpt, GstAdapter ** xmp_adpt,
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MetadataChunkArray * strip_chunks, MetadataChunkArray * inject_chunks,
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gboolean parse_only)
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{
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jpeg_data->state = JPEG_PARSE_NULL;
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jpeg_data->exif_adapter = exif_adpt;
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jpeg_data->iptc_adapter = iptc_adpt;
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jpeg_data->xmp_adapter = xmp_adpt;
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jpeg_data->read = 0;
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jpeg_data->jfif_found = FALSE;
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jpeg_data->strip_chunks = strip_chunks;
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jpeg_data->inject_chunks = inject_chunks;
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jpeg_data->parse_only = parse_only;
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}
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void
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metadataparse_jpeg_dispose (JpegParseData * jpeg_data)
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{
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jpeg_data->exif_adapter = NULL;
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jpeg_data->iptc_adapter = NULL;
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jpeg_data->xmp_adapter = NULL;
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}
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MetadataParsingReturn
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metadataparse_jpeg_parse (JpegParseData * jpeg_data, guint8 * buf,
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guint32 * bufsize, const guint32 offset, guint8 ** next_start,
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guint32 * next_size)
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{
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int ret = META_PARSING_DONE;
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guint8 mark[2] = { 0x00, 0x00 };
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const guint8 *step_buf = buf;
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*next_start = buf;
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if (jpeg_data->state == JPEG_PARSE_NULL) {
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if (*bufsize < 2) {
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*next_size = (buf - *next_start) + 2;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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mark[0] = READ (buf, *bufsize);
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mark[1] = READ (buf, *bufsize);
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if (mark[0] != 0xFF || mark[1] != 0xD8) {
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ret = META_PARSING_ERROR;
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goto done;
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}
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jpeg_data->state = JPEG_PARSE_READING;
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}
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while (ret == META_PARSING_DONE) {
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switch (jpeg_data->state) {
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case JPEG_PARSE_READING:
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ret =
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metadataparse_jpeg_reading (jpeg_data, &buf, bufsize,
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offset, step_buf, next_start, next_size);
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break;
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case JPEG_PARSE_JUMPING:
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ret =
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metadataparse_jpeg_jump (jpeg_data, &buf, bufsize, next_start,
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next_size);
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break;
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case JPEG_PARSE_EXIF:
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ret =
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metadataparse_jpeg_exif (jpeg_data, &buf, bufsize, next_start,
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next_size);
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break;
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case JPEG_PARSE_IPTC:
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#ifdef HAVE_IPTC
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ret =
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metadataparse_jpeg_iptc (jpeg_data, &buf, bufsize, next_start,
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next_size);
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#endif
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break;
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case JPEG_PARSE_XMP:
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ret =
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metadataparse_jpeg_xmp (jpeg_data, &buf, bufsize, next_start,
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next_size);
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break;
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case JPEG_PARSE_DONE:
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goto done;
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break;
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default:
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ret = META_PARSING_ERROR;
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break;
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}
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}
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done:
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return ret;
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}
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/* look for markers */
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static MetadataParsingReturn
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metadataparse_jpeg_reading (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, const guint32 offset, const guint8 * step_buf,
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guint8 ** next_start, guint32 * next_size)
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{
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int ret = META_PARSING_ERROR;
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guint8 mark[2] = { 0x00, 0x00 };
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guint16 chunk_size = 0;
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static const char JfifHeader[] = "JFIF";
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static const unsigned char ExifHeader[] =
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{ 0x45, 0x78, 0x69, 0x66, 0x00, 0x00 };
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static const char PhotoshopHeader[] = "Photoshop 3.0";
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static const char XmpHeader[] = "http://ns.adobe.com/xap/1.0/";
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*next_start = *buf;
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if (*bufsize < 2) {
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*next_size = (*buf - *next_start) + 2;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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mark[0] = READ (*buf, *bufsize);
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mark[1] = READ (*buf, *bufsize);
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if (mark[0] == 0xFF) {
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if (mark[1] == 0xD9) { /* end of image */
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ret = META_PARSING_DONE;
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jpeg_data->state = JPEG_PARSE_DONE;
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goto done;
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} else if (mark[1] == 0xDA) { /* start of scan, lets not look behinf of this */
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ret = META_PARSING_DONE;
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jpeg_data->state = JPEG_PARSE_DONE;
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goto done;
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}
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if (*bufsize < 2) {
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*next_size = (*buf - *next_start) + 2;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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chunk_size = READ (*buf, *bufsize) << 8;
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chunk_size += READ (*buf, *bufsize);
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if (mark[1] == 0xE0) { /* may be JFIF */
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if (chunk_size >= 16) {
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if (*bufsize < 14) {
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*next_size = (*buf - *next_start) + 14;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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if (0 == memcmp (JfifHeader, *buf, 5)) {
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jpeg_data->jfif_found = TRUE;
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}
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}
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} else if (mark[1] == 0xE1) { /* may be it is Exif or XMP */
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if (chunk_size >= 8) { /* size2 'EXIF' 0x00 0x00 */
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guint8 ch;
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if (*bufsize < 6) {
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*next_size = (*buf - *next_start) + 6;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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if (0 == memcmp (ExifHeader, *buf, 6)) {
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MetadataChunk chunk;
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if (!jpeg_data->parse_only) {
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = (*buf - step_buf) + offset - 4; /* maker + size */
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chunk.size = chunk_size + 2; /* chunk size plus app marker */
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chunk.type = MD_CHUNK_EXIF;
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metadata_chunk_array_append_sorted (jpeg_data->strip_chunks,
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&chunk);
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}
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if (!jpeg_data->jfif_found) {
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/* only inject if no JFIF has been found */
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static const guint8 segment[] = { 0xff, 0xe0, 0x00, 0x10,
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0x4a, 0x46, 0x49, 0x46, 0x00,
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0x01, 0x02,
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0x00, 0x00, 0x01, 0x00, 0x01,
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0x00, 0x00
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};
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if (!jpeg_data->parse_only) {
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = 2;
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chunk.size = 18;
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chunk.type = MD_CHUNK_UNKNOWN;
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chunk.data = g_new (guint8, 18);
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memcpy (chunk.data, segment, 18);
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metadata_chunk_array_append_sorted (jpeg_data->inject_chunks,
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&chunk);
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}
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}
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if (jpeg_data->exif_adapter) {
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jpeg_data->read = chunk_size - 2;
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jpeg_data->state = JPEG_PARSE_EXIF;
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ret = META_PARSING_DONE;
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goto done;
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}
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}
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if (chunk_size >= 31) { /* size2 "http://ns.adobe.com/xap/1.0/" */
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if (*bufsize < 29) {
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*next_size = (*buf - *next_start) + 29;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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if (0 == memcmp (XmpHeader, *buf, 29)) {
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if (!jpeg_data->parse_only) {
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MetadataChunk chunk;
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = (*buf - step_buf) + offset - 4; /* maker + size */
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chunk.size = chunk_size + 2; /* chunk size plus app marker */
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chunk.type = MD_CHUNK_XMP;
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metadata_chunk_array_append_sorted (jpeg_data->strip_chunks,
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&chunk);
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}
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/* if adapter has been provided, prepare to hold chunk */
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if (jpeg_data->xmp_adapter) {
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*buf += 29;
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*bufsize -= 29;
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jpeg_data->read = chunk_size - 2 - 29;
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jpeg_data->state = JPEG_PARSE_XMP;
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ret = META_PARSING_DONE;
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goto done;
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}
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}
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}
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}
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}
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#ifdef HAVE_IPTC
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else if (mark[1] == 0xED) { /* may be it is photoshop and may be there is iptc */
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if (chunk_size >= 16) { /* size2 "Photoshop 3.0" */
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if (*bufsize < 14) {
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*next_size = (*buf - *next_start) + 14;
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ret = META_PARSING_NEED_MORE_DATA;
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goto done;
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}
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if (0 == memcmp (PhotoshopHeader, *buf, 14)) {
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if (!jpeg_data->parse_only) {
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MetadataChunk chunk;
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = (*buf - step_buf) + offset - 4; /* maker + size */
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chunk.size = chunk_size + 2; /* chunk size plus app marker */
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chunk.type = MD_CHUNK_IPTC;
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metadata_chunk_array_append_sorted (jpeg_data->strip_chunks,
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&chunk);
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}
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/* if adapter has been provided, prepare to hold chunk */
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if (jpeg_data->iptc_adapter) {
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jpeg_data->read = chunk_size - 2;
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jpeg_data->state = JPEG_PARSE_IPTC;
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ret = META_PARSING_DONE;
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goto done;
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}
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}
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}
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}
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#endif /* #ifdef HAVE_IPTC */
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/* just set jump sise */
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jpeg_data->read = chunk_size - 2;
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jpeg_data->state = JPEG_PARSE_JUMPING;
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ret = META_PARSING_DONE;
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} else {
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/* invalid JPEG chunk */
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ret = META_PARSING_ERROR;
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}
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done:
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return ret;
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}
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static MetadataParsingReturn
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metadataparse_jpeg_exif (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
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{
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int ret;
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ret = metadataparse_util_hold_chunk (&jpeg_data->read, buf,
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bufsize, next_start, next_size, jpeg_data->exif_adapter);
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if (ret == META_PARSING_DONE) {
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jpeg_data->state = JPEG_PARSE_READING;
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/* if there is a second Exif chunk in the file it will be jumped */
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jpeg_data->exif_adapter = NULL;
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}
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return ret;
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}
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#ifdef HAVE_IPTC
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static MetadataParsingReturn
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metadataparse_jpeg_iptc (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
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{
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int ret;
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ret = metadataparse_util_hold_chunk (&jpeg_data->read, buf,
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bufsize, next_start, next_size, jpeg_data->iptc_adapter);
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if (ret == META_PARSING_DONE) {
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const guint8 *buf;
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guint32 size;
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unsigned int iptc_len;
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int res;
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jpeg_data->state = JPEG_PARSE_READING;
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size = gst_adapter_available (*jpeg_data->iptc_adapter);
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buf = gst_adapter_peek (*jpeg_data->iptc_adapter, size);
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res = iptc_jpeg_ps3_find_iptc (buf, size, &iptc_len);
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if (res < 0) {
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/* error */
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ret = META_PARSING_ERROR;
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} else if (res == 0) {
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/* no iptc data found */
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gst_adapter_clear (*jpeg_data->iptc_adapter);
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} else {
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gst_adapter_flush (*jpeg_data->iptc_adapter, res);
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size = gst_adapter_available (*jpeg_data->iptc_adapter);
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if (size > iptc_len) {
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GstBuffer *buf;
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buf = gst_adapter_take_buffer (*jpeg_data->iptc_adapter, iptc_len);
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gst_adapter_clear (*jpeg_data->iptc_adapter);
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gst_adapter_push (*jpeg_data->iptc_adapter, buf);
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}
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}
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/* if there is a second Iptc chunk in the file it will be jumped */
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jpeg_data->iptc_adapter = NULL;
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}
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return ret;
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}
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#endif
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static MetadataParsingReturn
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metadataparse_jpeg_xmp (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
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{
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int ret;
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ret = metadataparse_util_hold_chunk (&jpeg_data->read, buf,
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bufsize, next_start, next_size, jpeg_data->xmp_adapter);
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if (ret == META_PARSING_DONE) {
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jpeg_data->state = JPEG_PARSE_READING;
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/* if there is a second XMP chunk in the file it will be jumped */
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jpeg_data->xmp_adapter = NULL;
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}
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return ret;
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}
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static MetadataParsingReturn
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metadataparse_jpeg_jump (JpegParseData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
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{
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jpeg_data->state = JPEG_PARSE_READING;
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return metadataparse_util_jump_chunk (&jpeg_data->read, buf,
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bufsize, next_start, next_size);
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}
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