func: static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info,
  
          int *need_next_header, int *new_frame_start)
  
  {
  
      GetBitContext bits;
  
      AACADTSHeaderInfo hdr;
  
      int size;
  
      union {
  
          uint64_t u64;
  
          uint8_t  u8[8];
  
      } tmp;
  
  
  
      tmp.u64 = av_be2ne64(state);
  
      init_get_bits(&bits, tmp.u8+8-AAC_ADTS_HEADER_SIZE, AAC_ADTS_HEADER_SIZE * 8);
  
  
  
      if ((size = avpriv_aac_parse_header(&bits, &hdr)) < 0)
  
          return 0;
  
      *need_next_header = 0;
  
      *new_frame_start  = 1;
  
      hdr_info->sample_rate = hdr.sample_rate;
  
      hdr_info->channels    = ff_mpeg4audio_channels[hdr.chan_config];
  
      hdr_info->samples     = hdr.samples;
  
      hdr_info->bit_rate    = hdr.bit_rate;
  
      return size;
  
  }
  