static int get_riff ( AVFormatContext * s , AVIOContext * pb ) {
 AVIContext * avi = s -> priv_data ;
 char header [ 8 ] = {
 0 }
 ;
 int i ;
 avio_read ( pb , header , 4 ) ;
 avi -> riff_end = avio_rl32 ( pb ) ;
 avi -> riff_end += avio_tell ( pb ) ;
 avio_read ( pb , header + 4 , 4 ) ;
 for ( i = 0 ;
 avi_headers [ i ] [ 0 ] ;
 i ++ ) if ( ! memcmp ( header , avi_headers [ i ] , 8 ) ) break ;
 if ( ! avi_headers [ i ] [ 0 ] ) return AVERROR_INVALIDDATA ;
 if ( header [ 7 ] == 0x19 ) av_log ( s , AV_LOG_INFO , "This file has been generated by a totally broken muxer.\n" ) ;
 return 0 ;
 }
static int get_riff ( AVFormatContext * s , AVIOContext * pb ) {
 AVIContext * avi = s -> priv_data ;
 char header [ 8 ] = {
 0 }
 ;
 int i ;
 avio_read ( pb , header , 4 ) ;
 avi -> riff_end = avio_rl32 ( pb ) ;
 avi -> riff_end += avio_tell ( pb ) ;
 avio_read ( pb , header + 4 , 4 ) ;
 for ( i = 0 ;
 avi_headers [ i ] [ 0 ] ;
 i ++ ) if ( ! memcmp ( header , avi_headers [ i ] , 8 ) ) break ;
 if ( ! avi_headers [ i ] [ 0 ] ) return AVERROR_INVALIDDATA ;
 if ( header [ 7 ] == 0x19 ) av_log ( s , AV_LOG_INFO , "This file has been generated by a totally broken muxer.\n" ) ;
 return 0 ;
 }