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321 lines
9 KiB
C
321 lines
9 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 "metadatamuxjpeg.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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metadatamux_jpeg_reading (JpegMuxData * 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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#define READ(buf, size) ( (size)--, *((buf)++) )
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static void
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metadatamux_wrap_chunk (MetadataChunk * chunk, const guint8 * buf,
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guint32 buf_size, guint8 a, guint8 b)
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{
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guint8 *data = g_new (guint8, 4 + buf_size + chunk->size);
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memcpy (data + 4 + buf_size, chunk->data, chunk->size);
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g_free (chunk->data);
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chunk->data = data;
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chunk->size += 4 + buf_size;
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data[0] = a;
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data[1] = b;
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data[2] = ((chunk->size - 2) >> 8) & 0xFF;
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data[3] = (chunk->size - 2) & 0xFF;
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if (buf && buf_size) {
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memcpy (data + 4, buf, buf_size);
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}
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}
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void
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metadatamux_jpeg_lazy_update (JpegMuxData * jpeg_data)
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{
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gsize i;
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gboolean has_exif = FALSE;
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for (i = 0; i < jpeg_data->inject_chunks->len; ++i) {
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if (jpeg_data->inject_chunks->chunk[i].size > 0 &&
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jpeg_data->inject_chunks->chunk[i].data) {
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switch (jpeg_data->inject_chunks->chunk[i].type) {
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case MD_CHUNK_EXIF:
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metadatamux_wrap_chunk (&jpeg_data->inject_chunks->chunk[i], NULL, 0,
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0xFF, 0xE1);
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has_exif = TRUE;
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break;
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case MD_CHUNK_IPTC:
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#ifdef HAVE_IPTC
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{
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unsigned int size = jpeg_data->inject_chunks->chunk[i].size + 256;
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unsigned char *buf = g_new (guint8, size);
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size = iptc_jpeg_ps3_save_iptc (NULL, 0,
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jpeg_data->inject_chunks->chunk[i].data,
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jpeg_data->inject_chunks->chunk[i].size, buf, size);
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if (size > 0) {
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g_free (jpeg_data->inject_chunks->chunk[i].data);
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jpeg_data->inject_chunks->chunk[i].data = buf;
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jpeg_data->inject_chunks->chunk[i].size = size;
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metadatamux_wrap_chunk (&jpeg_data->inject_chunks->chunk[i], NULL,
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0, 0xFF, 0xED);
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} else {
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GST_ERROR ("Invalid IPTC chunk\n");
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g_free (buf);
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/* FIXME: remove entry from list */
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}
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}
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#endif /* #ifdef HAVE_IPTC */
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break;
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case MD_CHUNK_XMP:
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{
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static const char XmpHeader[] = "http://ns.adobe.com/xap/1.0/";
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metadatamux_wrap_chunk (&jpeg_data->inject_chunks->chunk[i],
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XmpHeader, sizeof (XmpHeader), 0xFF, 0xE1);
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}
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break;
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default:
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break;
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}
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}
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}
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if (!has_exif) {
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/* EXIF not injected so not strip JFIF anymore */
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metadata_chunk_array_clear (jpeg_data->strip_chunks);
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}
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}
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void
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metadatamux_jpeg_init (JpegMuxData * jpeg_data,
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MetadataChunkArray * strip_chunks, MetadataChunkArray * inject_chunks)
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{
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jpeg_data->state = JPEG_MUX_NULL;
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jpeg_data->strip_chunks = strip_chunks;
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jpeg_data->inject_chunks = inject_chunks;
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}
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void
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metadatamux_jpeg_dispose (JpegMuxData * jpeg_data)
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{
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jpeg_data->inject_chunks = NULL;
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jpeg_data->strip_chunks = NULL;
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jpeg_data->state = JPEG_MUX_NULL;
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}
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MetadataParsingReturn
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metadatamux_jpeg_parse (JpegMuxData * 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_MUX_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_MUX_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_MUX_READING:
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ret =
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metadatamux_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_MUX_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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metadatamux_jpeg_reading (JpegMuxData * 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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gint64 new_chunk_offset = 0;
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MetadataChunk chunk;
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gboolean jfif_found = FALSE;
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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 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 = 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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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 < 5) {
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*next_size = (*buf - *next_start) + 5;
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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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jfif_found = TRUE;
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}
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} else {
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/* FIXME: should we check if the first chunk is EXIF? */
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}
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}
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if (!jfif_found) {
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ret = META_PARSING_ERROR;
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goto done;
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}
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new_chunk_offset = 2;
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/* EXIF will always be in the begining */
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = 2;
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chunk.type = MD_CHUNK_EXIF;
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metadata_chunk_array_append_sorted (jpeg_data->inject_chunks, &chunk);
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if (jfif_found) {
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/* remove JFIF chunk */
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/* this acation can be canceled with lazy update if no Exif is add */
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = 2;
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chunk.size = chunk_size + 2; /* chunk size plus app marker */
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chunk.type = MD_CHUNK_UNKNOWN;
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metadata_chunk_array_append_sorted (jpeg_data->strip_chunks, &chunk);
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new_chunk_offset = chunk.offset_orig + chunk.size;
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}
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/* IPTC */
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = new_chunk_offset;
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chunk.type = MD_CHUNK_IPTC;
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metadata_chunk_array_append_sorted (jpeg_data->inject_chunks, &chunk);
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/* XMP */
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memset (&chunk, 0x00, sizeof (MetadataChunk));
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chunk.offset_orig = new_chunk_offset;
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chunk.type = MD_CHUNK_XMP;
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metadata_chunk_array_append_sorted (jpeg_data->inject_chunks, &chunk);
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jpeg_data->state = JPEG_MUX_DONE;
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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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