From 929954f595220293179b7ce22f563f1707934566 Mon Sep 17 00:00:00 2001
From: Edgard Lima <edgard.lima@indt.org.br>
Date: Thu, 1 Nov 2007 16:04:29 +0000
Subject: Some XMP stuff added.

Original commit message from CVS:
Some XMP stuff added.
---
 ext/metadata/metadataparsejpeg.c | 42 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

(limited to 'ext/metadata/metadataparsejpeg.c')

diff --git a/ext/metadata/metadataparsejpeg.c b/ext/metadata/metadataparsejpeg.c
index bf453a12..753d436a 100644
--- a/ext/metadata/metadataparsejpeg.c
+++ b/ext/metadata/metadataparsejpeg.c
@@ -65,6 +65,10 @@ 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);
@@ -80,11 +84,14 @@ metadataparse_jpeg_init (JpegData * jpeg_data, GstAdapter ** 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;
@@ -143,6 +150,11 @@ metadataparse_jpeg_parse (JpegData * jpeg_data, guint8 * buf,
             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;
@@ -172,6 +184,7 @@ metadataparse_jpeg_reading (JpegData * jpeg_data, guint8 ** buf,
   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;
 
@@ -204,7 +217,8 @@ metadataparse_jpeg_reading (JpegData * jpeg_data, guint8 ** buf,
     chunk_size = READ (*buf, *bufsize) << 8;
     chunk_size += READ (*buf, *bufsize);
 
-    if (mark[1] == 0xE1) {      /* may be it is Exif */
+    if (mark[1] == 0xE1) {      /* may be it is Exif or XMP */
+
       if (chunk_size >= 8) {    /* size2 'EXIF' 0x00 0x00 */
         guint8 ch;
 
@@ -222,6 +236,22 @@ metadataparse_jpeg_reading (JpegData * jpeg_data, guint8 ** buf,
             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)) {
+              jpeg_data->read = chunk_size - 2;
+              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" */
@@ -349,6 +379,16 @@ metadataparse_jpeg_iptc (JpegData * jpeg_data, guint8 ** buf,
 
 }
 
+static int
+metadataparse_jpeg_xmp (JpegData * jpeg_data, guint8 ** buf,
+    guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
+{
+
+  return metadataparse_jpeg_hold_chunk (jpeg_data, buf,
+      bufsize, next_start, next_size, jpeg_data->adpt_xmp);
+
+}
+
 static int
 metadataparse_jpeg_jump (JpegData * jpeg_data, guint8 ** buf,
     guint32 * bufsize, guint8 ** next_start, guint32 * next_size)
-- 
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