From 5875e2016a0437b2127be00f0c95060b95aab668 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim-Philipp=20M=C3=BCller?= <tim.muller@collabora.co.uk>
Date: Sat, 15 Aug 2009 20:38:40 +0100
Subject: [PATCH] qtdemux: add qt_atom_parser_get_offset() and optimise
 _peek_sub()

---
 gst/qtdemux/qtatomparser.h | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/gst/qtdemux/qtatomparser.h b/gst/qtdemux/qtatomparser.h
index 44f40c2a7e..dbd6b8205a 100644
--- a/gst/qtdemux/qtatomparser.h
+++ b/gst/qtdemux/qtatomparser.h
@@ -104,10 +104,10 @@ qt_atom_parser_peek_sub (QtAtomParser * parser, guint offset, guint size,
 {
   *sub = *parser;
 
-  if (G_UNLIKELY (!gst_byte_reader_skip (sub, offset)))
+  if (G_UNLIKELY (!qt_atom_parser_skip (sub, offset)))
     return FALSE;
 
-  return (gst_byte_reader_get_remaining (sub) >= size);
+  return (qt_atom_parser_get_remaining (sub) >= size);
 }
 
 static inline gboolean
@@ -122,4 +122,30 @@ qt_atom_parser_skipn_and_get_uint32 (QtAtomParser * parser,
   return TRUE;
 }
 
+/* off_size must be either 4 or 8 */
+static inline gboolean
+qt_atom_parser_get_offset (QtAtomParser * parser, guint off_size, guint64 * val)
+{
+  if (G_UNLIKELY (qt_atom_parser_get_remaining (parser) < off_size))
+    return FALSE;
+
+  if (off_size == sizeof (guint64)) {
+    *val = qt_atom_parser_get_uint64_unchecked (parser);
+  } else {
+    *val = qt_atom_parser_get_uint32_unchecked (parser);
+  }
+  return TRUE;
+}
+
+/* off_size must be either 4 or 8 */
+static inline guint64
+qt_atom_parser_get_offset_unchecked (QtAtomParser * parser, guint off_size)
+{
+  if (off_size == sizeof (guint64)) {
+    return qt_atom_parser_get_uint64_unchecked (parser);
+  } else {
+    return qt_atom_parser_get_uint32_unchecked (parser);
+  }
+}
+
 #endif /* QT_ATOM_PARSER_H */