gstreamer/ext/metadata/metadataparsejpeg.c
Edgard Lima f17824d0d1 Added support for PNG/XMP. Indentation. And fixed pull mode to parse the file.
Original commit message from CVS:
Added support for PNG/XMP. Indentation. And fixed pull mode to parse the file.
2007-11-02 16:50:42 +00:00

376 lines
9.8 KiB
C

/*
* 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 "metadataparsejpeg.h"
#include <string.h>
#include <libiptcdata/iptc-jpeg.h>
static int
metadataparse_jpeg_reading (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
static int
metadataparse_jpeg_exif (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
static int
metadataparse_jpeg_iptc (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
static int
metadataparse_jpeg_xmp (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
static int
metadataparse_jpeg_jump (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size);
#define READ(buf, size) ( (size)--, *((buf)++) )
void
metadataparse_jpeg_init (JpegData * jpeg_data, GstAdapter ** adpt_exif,
GstAdapter ** adpt_iptc, GstAdapter ** adpt_xmp)
{
jpeg_data->state = JPEG_NULL;
jpeg_data->adpt_exif = adpt_exif;
jpeg_data->adpt_iptc = adpt_iptc;
jpeg_data->adpt_xmp = adpt_xmp;
jpeg_data->read = 0;
metadataparse_xmp_init ();
}
void
metadataparse_jpeg_dispose (JpegData * jpeg_data)
{
metadataparse_xmp_dispose ();
jpeg_data->adpt_exif = NULL;
jpeg_data->adpt_iptc = NULL;
jpeg_data->adpt_xmp = NULL;
}
int
metadataparse_jpeg_parse (JpegData * jpeg_data, guint8 * buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
{
int ret = 0;
guint8 mark[2] = { 0x00, 0x00 };
*next_start = buf;
if (jpeg_data->state == JPEG_NULL) {
if (*bufsize < 2) {
*next_size = (buf - *next_start) + 2;
ret = 1;
goto done;
}
mark[0] = READ (buf, *bufsize);
mark[1] = READ (buf, *bufsize);
if (mark[0] != 0xFF || mark[1] != 0xD8) {
ret = -1;
goto done;
}
jpeg_data->state = JPEG_READING;
}
while (ret == 0) {
switch (jpeg_data->state) {
case JPEG_READING:
ret =
metadataparse_jpeg_reading (jpeg_data, &buf, bufsize, next_start,
next_size);
break;
case JPEG_JUMPING:
ret =
metadataparse_jpeg_jump (jpeg_data, &buf, bufsize, next_start,
next_size);
break;
case JPEG_EXIF:
ret =
metadataparse_jpeg_exif (jpeg_data, &buf, bufsize, next_start,
next_size);
break;
case JPEG_IPTC:
ret =
metadataparse_jpeg_iptc (jpeg_data, &buf, bufsize, next_start,
next_size);
break;
case JPEG_XMP:
ret =
metadataparse_jpeg_xmp (jpeg_data, &buf, bufsize, next_start,
next_size);
break;
case JPEG_DONE:
goto done;
break;
default:
ret = -1;
break;
}
}
done:
return ret;
}
/* look for markers */
static int
metadataparse_jpeg_reading (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
{
int ret = -1;
guint8 mark[2] = { 0x00, 0x00 };
guint16 chunk_size = 0;
static const unsigned char ExifHeader[] =
{ 0x45, 0x78, 0x69, 0x66, 0x00, 0x00 };
static const char IptcHeader[] = "Photoshop 3.0";
static const char XmpHeader[] = "http://ns.adobe.com/xap/1.0/";
*next_start = *buf;
if (*bufsize < 2) {
*next_size = (*buf - *next_start) + 2;
ret = 1;
goto done;
}
mark[0] = READ (*buf, *bufsize);
mark[1] = READ (*buf, *bufsize);
if (mark[0] == 0xFF) {
if (mark[1] == 0xD9) { /* end of image */
ret = 0;
jpeg_data->state = JPEG_DONE;
goto done;
} else if (mark[1] == 0xDA) { /* start of scan, lets not look behinf of this */
ret = 0;
jpeg_data->state = JPEG_DONE;
goto done;
}
if (*bufsize < 2) {
*next_size = (*buf - *next_start) + 2;
ret = 1;
goto done;
}
chunk_size = READ (*buf, *bufsize) << 8;
chunk_size += READ (*buf, *bufsize);
if (mark[1] == 0xE1) { /* may be it is Exif or XMP */
if (chunk_size >= 8) { /* size2 'EXIF' 0x00 0x00 */
guint8 ch;
if (*bufsize < 6) {
*next_size = (*buf - *next_start) + 6;
ret = 1;
goto done;
}
if (jpeg_data->adpt_exif) {
if (0 == memcmp (ExifHeader, *buf, 6)) {
jpeg_data->read = chunk_size - 2;
ret = 0;
jpeg_data->state = JPEG_EXIF;
goto done;
}
}
if (chunk_size >= 31) { /* size2 "http://ns.adobe.com/xap/1.0/" */
if (*bufsize < 29) {
*next_size = (*buf - *next_start) + 29;
ret = 1;
goto done;
}
if (jpeg_data->adpt_xmp) {
if (0 == memcmp (XmpHeader, *buf, 29)) {
*buf += 29;
*bufsize -= 29;
jpeg_data->read = chunk_size - 2 - 29;
ret = 0;
jpeg_data->state = JPEG_XMP;
goto done;
}
}
}
}
} else if (mark[1] == 0xED) { /* may be it is photoshop and may be there is iptc */
if (chunk_size >= 16) { /* size2 "Photoshop 3.0" */
if (*bufsize < 14) {
*next_size = (*buf - *next_start) + 14;
ret = 1;
goto done;
}
if (jpeg_data->adpt_iptc) {
if (0 == memcmp (IptcHeader, *buf, 14)) {
jpeg_data->read = chunk_size - 2;
ret = 0;
jpeg_data->state = JPEG_IPTC;
goto done;
}
}
}
}
/* just set jump sise */
jpeg_data->read = chunk_size - 2;
jpeg_data->state = JPEG_JUMPING;
ret = 0;
} else {
/* invalid JPEG chunk */
ret = -1;
}
done:
return ret;
}
static int
metadataparse_jpeg_exif (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
{
int ret;
ret = metadataparse_util_hold_chunk (&jpeg_data->read, buf,
bufsize, next_start, next_size, jpeg_data->adpt_exif);
if (ret == 0) {
jpeg_data->state = JPEG_READING;
}
return ret;
}
static int
metadataparse_jpeg_iptc (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
{
int ret;
ret = metadataparse_util_hold_chunk (&jpeg_data->read, buf,
bufsize, next_start, next_size, jpeg_data->adpt_iptc);
if (ret == 0) {
const guint8 *buf;
guint32 size;
unsigned int iptc_len;
int res;
jpeg_data->state = JPEG_READING;
size = gst_adapter_available (*jpeg_data->adpt_iptc);
buf = gst_adapter_peek (*jpeg_data->adpt_iptc, size);
res = iptc_jpeg_ps3_find_iptc (buf, size, &iptc_len);
if (res < 0) {
/* error */
ret = -1;
} else if (res == 0) {
/* no iptc data found */
gst_adapter_clear (*jpeg_data->adpt_iptc);
} else {
gst_adapter_flush (*jpeg_data->adpt_iptc, res);
size = gst_adapter_available (*jpeg_data->adpt_iptc);
if (size > iptc_len) {
GstBuffer *buf;
buf = gst_adapter_take_buffer (*jpeg_data->adpt_iptc, iptc_len);
gst_adapter_clear (*jpeg_data->adpt_iptc);
gst_adapter_push (*jpeg_data->adpt_iptc, buf);
}
}
}
return ret;
}
static int
metadataparse_jpeg_xmp (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
{
int ret;
ret = metadataparse_util_hold_chunk (&jpeg_data->read, buf,
bufsize, next_start, next_size, jpeg_data->adpt_xmp);
if (ret == 0) {
jpeg_data->state = JPEG_READING;
}
return ret;
}
static int
metadataparse_jpeg_jump (JpegData * jpeg_data, guint8 ** buf,
guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
{
jpeg_data->state = JPEG_READING;
return metadataparse_util_jump_chunk (&jpeg_data->read, buf,
bufsize, next_start, next_size);
}