move aac and ac3 parsers in their own files

Originally committed as revision 8941 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/parser.h

@@ -24,7 +24,6 @@
 #define FFMPEG_PARSER_H
 
 #include "avcodec.h"
-#include "ac3.h"
 
 typedef struct ParseContext{
     uint8_t *buffer;
@@ -63,16 +62,4 @@ void ff_parse1_close(AVCodecParserContext *s);
 /* h263dec.c */
 int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 
-/**
- * Parses AC-3 frame header.
- * Parses the header up to the lfeon element, which is the first 52 or 54 bits
- * depending on the audio coding mode.
- * @param buf[in] Array containing the first 7 bytes of the frame.
- * @param hdr[out] Pointer to struct where header info is written.
- * @return Returns 0 on success, -1 if there is a sync word mismatch,
- * -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate)
- * element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.
- */
-int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr);
-
 #endif /* !FFMPEG_PARSER_H */