move ff_mpeg4_find_frame_end() from h263dec.c to mpeg4video_parser.c

now h263dec depends on mpeg4video_parser
this fixes compilation when h263 decoder is disabled

Originally committed as revision 8962 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpeg4video_parser.h

@@ -0,0 +1,34 @@
+/*
+ * MPEG4 video parser prototypes
+ * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Michael Niedermayer.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MPEG4VIDEO_PARSER_H
+#define MPEG4VIDEO_PARSER_H
+
+#include "parser.h"
+
+/**
+ * finds the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or -1
+ */
+int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
+
+#endif /* MPEG4VIDEO_PARSER_H */