lavc: use avpriv_ prefix for ff_ac3_parse_header.

It's used in lavf.

libavcodec/ac3_parser.c

@@ -35,7 +35,7 @@ static const uint8_t eac3_blocks[4] = {
 };
 
 
-int ff_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr)
+int avpriv_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr)
 {
     int frame_size_code;
 
@@ -141,7 +141,7 @@ static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info,
     GetBitContext gbc;
 
     init_get_bits(&gbc, tmp.u8+8-AC3_HEADER_SIZE, 54);
-    err = ff_ac3_parse_header(&gbc, &hdr);
+    err = avpriv_ac3_parse_header(&gbc, &hdr);
 
     if(err < 0)
         return 0;

libavcodec/ac3_parser.h

@@ -36,6 +36,6 @@
  * -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(GetBitContext *gbc, AC3HeaderInfo *hdr);
+int avpriv_ac3_parse_header(GetBitContext *gbc, AC3HeaderInfo *hdr);
 
 #endif /* AVCODEC_AC3_PARSER_H */

libavcodec/ac3dec.c

@@ -261,7 +261,7 @@ static int parse_frame_header(AC3DecodeContext *s)
     AC3HeaderInfo hdr;
     int err;
 
-    err = ff_ac3_parse_header(&s->gbc, &hdr);
+    err = avpriv_ac3_parse_header(&s->gbc, &hdr);
     if(err)
         return err;
 

libavformat/ac3dec.c

@@ -41,7 +41,7 @@ static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
 
         for(frames = 0; buf2 < end; frames++) {
             init_get_bits(&gbc, buf2, 54);
-            if(ff_ac3_parse_header(&gbc, &hdr) < 0)
+            if(avpriv_ac3_parse_header(&gbc, &hdr) < 0)
                 break;
             if(buf2 + hdr.frame_size > end ||
                av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))