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414 lines
11 KiB
C
414 lines
11 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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#include <libiptcdata/iptc-jpeg.h>
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static int
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metadataparse_jpeg_reading (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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static int
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metadataparse_jpeg_hold_chunk (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start,
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guint32 * next_size, GstAdapter ** adapter);
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static int
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metadataparse_jpeg_exif (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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static int
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metadataparse_jpeg_iptc (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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static int
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metadataparse_jpeg_xmp (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
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static int
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metadataparse_jpeg_jump (JpegData * 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_init (JpegData * jpeg_data, GstAdapter ** adpt_exif,
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GstAdapter ** adpt_iptc, GstAdapter ** adpt_xmp)
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{
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jpeg_data->state = JPEG_NULL;
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jpeg_data->adpt_exif = adpt_exif;
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jpeg_data->adpt_iptc = adpt_iptc;
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jpeg_data->adpt_xmp = adpt_xmp;
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jpeg_data->read = 0;
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metadataparse_xmp_init ();
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}
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void
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metadataparse_jpeg_dispose (JpegData * jpeg_data)
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{
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metadataparse_xmp_dispose ();
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jpeg_data->adpt_exif = NULL;
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jpeg_data->adpt_iptc = NULL;
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jpeg_data->adpt_xmp = NULL;
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}
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int
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metadataparse_jpeg_parse (JpegData * 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 = 0;
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guint8 mark[2] = { 0x00, 0x00 };
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*next_start = buf;
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if (jpeg_data->state == JPEG_NULL) {
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if (*bufsize < 2) {
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*next_size = (buf - *next_start) + 2;
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ret = 1;
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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 = -1;
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goto done;
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}
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jpeg_data->state = JPEG_READING;
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}
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while (ret == 0) {
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switch (jpeg_data->state) {
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case JPEG_READING:
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ret =
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metadataparse_jpeg_reading (jpeg_data, &buf, bufsize, next_start,
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next_size);
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break;
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case JPEG_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_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_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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break;
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case JPEG_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_DONE:
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goto done;
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break;
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default:
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ret = -1;
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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 int
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metadataparse_jpeg_reading (JpegData * 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 = -1;
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guint8 mark[2] = { 0x00, 0x00 };
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guint16 chunk_size = 0;
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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 IptcHeader[] = "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 = 1;
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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 = 0;
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jpeg_data->state = JPEG_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 = 0;
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jpeg_data->state = JPEG_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 = 1;
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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] == 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 = 1;
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goto done;
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}
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if (jpeg_data->adpt_exif) {
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if (0 == memcmp (ExifHeader, *buf, 6)) {
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jpeg_data->read = chunk_size - 2;
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ret = 0;
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jpeg_data->state = JPEG_EXIF;
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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 = 1;
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goto done;
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}
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if (jpeg_data->adpt_xmp) {
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if (0 == memcmp (XmpHeader, *buf, 29)) {
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jpeg_data->read = chunk_size - 2;
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ret = 0;
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jpeg_data->state = JPEG_XMP;
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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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} 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 = 1;
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goto done;
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}
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if (jpeg_data->adpt_iptc) {
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if (0 == memcmp (IptcHeader, *buf, 14)) {
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jpeg_data->read = chunk_size - 2;
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ret = 0;
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jpeg_data->state = JPEG_IPTC;
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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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/* just set jump sise */
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jpeg_data->read = chunk_size - 2;
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jpeg_data->state = JPEG_JUMPING;
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ret = 0;
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} else {
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/* invalid JPEG chunk */
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ret = -1;
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}
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done:
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return ret;
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}
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static int
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metadataparse_jpeg_hold_chunk (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start,
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guint32 * next_size, GstAdapter ** adapter)
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{
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int ret;
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if (jpeg_data->read > *bufsize) {
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*next_start = *buf;
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*next_size = jpeg_data->read;
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ret = 1;
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} else {
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GstBuffer *gst_buf;
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if (NULL == *adapter) {
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*adapter = gst_adapter_new ();
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}
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gst_buf = gst_buffer_new_and_alloc (jpeg_data->read);
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memcpy (GST_BUFFER_DATA (gst_buf), *buf, jpeg_data->read);
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gst_adapter_push (*adapter, gst_buf);
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*next_start = *buf + jpeg_data->read;
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*buf += jpeg_data->read;
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*bufsize -= jpeg_data->read;
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jpeg_data->state = JPEG_READING;
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ret = 0;
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}
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return ret;
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}
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static int
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metadataparse_jpeg_exif (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
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{
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return metadataparse_jpeg_hold_chunk (jpeg_data, buf,
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bufsize, next_start, next_size, jpeg_data->adpt_exif);
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}
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static int
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metadataparse_jpeg_iptc (JpegData * 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_jpeg_hold_chunk (jpeg_data, buf,
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bufsize, next_start, next_size, jpeg_data->adpt_iptc);
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if (ret == 0) {
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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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size = gst_adapter_available (*jpeg_data->adpt_iptc);
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buf = gst_adapter_peek (*jpeg_data->adpt_iptc, 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 = -1;
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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->adpt_iptc);
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} else {
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gst_adapter_flush (*jpeg_data->adpt_iptc, res);
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size = gst_adapter_available (*jpeg_data->adpt_iptc);
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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->adpt_iptc, iptc_len);
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gst_adapter_clear (*jpeg_data->adpt_iptc);
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gst_adapter_push (*jpeg_data->adpt_iptc, buf);
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}
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}
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}
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return ret;
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}
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static int
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metadataparse_jpeg_xmp (JpegData * jpeg_data, guint8 ** buf,
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guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
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{
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return metadataparse_jpeg_hold_chunk (jpeg_data, buf,
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bufsize, next_start, next_size, jpeg_data->adpt_xmp);
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}
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static int
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metadataparse_jpeg_jump (JpegData * 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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if (jpeg_data->read > *bufsize) {
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jpeg_data->read -= *bufsize;
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*next_size = 2;
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*next_start = *buf + *bufsize + jpeg_data->read;
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jpeg_data->read = 0;
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*bufsize = 0;
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jpeg_data->state = JPEG_READING;
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ret = 1;
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} else {
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*next_start = *buf + jpeg_data->read;
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*buf += jpeg_data->read;
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*bufsize -= jpeg_data->read;
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jpeg_data->state = JPEG_READING;
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ret = 0;
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}
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return ret;
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}
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