Importing libmpeg2 from mpeg2dec-0.3.1

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9858 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 76 insertions, 0 deletions

diff --git a/libmpeg2/alloc.c b/libmpeg2/alloc.c
new file mode 100644
index 0000000000..0a434d9782
--- /dev/null
+++ b/libmpeg2/alloc.c
@@ -0,0 +1,76 @@
+/*
+ * alloc.c
+ * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <inttypes.h>
+
+#include "mpeg2.h"
+#include "mpeg2_internal.h"
+
+#if defined(HAVE_MEMALIGN) && !defined(__cplusplus)
+/* some systems have memalign() but no declaration for it */
+void * memalign (size_t align, size_t size);
+#endif
+
+void * (* mpeg2_malloc_hook) (int size, int reason) = NULL;
+int (* mpeg2_free_hook) (void * buf) = NULL;
+
+void * mpeg2_malloc (int size, int reason)
+{
+    char * buf;
+
+    if (mpeg2_malloc_hook) {
+	buf = (char *) mpeg2_malloc_hook (size, reason);
+	if (buf)
+	    return buf;
+    }
+
+#if defined(HAVE_MEMALIGN) && !defined(__cplusplus) && !defined(DEBUG)
+    return memalign (16, size);
+#else
+    buf = (char *) malloc (size + 15 + sizeof (void **));
+    if (buf) {
+	char * align_buf;
+
+	align_buf = buf + 15 + sizeof (void **);
+	align_buf -= (long)align_buf & 15;
+	*(((void **)align_buf) - 1) = buf;
+	return align_buf;
+    }
+    return NULL;
+#endif
+}
+
+void mpeg2_free (void * buf)
+{
+    if (mpeg2_free_hook && mpeg2_free_hook (buf))
+	return;
+
+#if defined(HAVE_MEMALIGN) && !defined(__cplusplus) && !defined(DEBUG)
+    free (buf);
+#else
+    free (*(((void **)buf) - 1));
+#endif
+}