static void h263_decode_dquant ( MpegEncContext * s ) {
 static const int8_t quant_tab [ 4 ] = {
 - 1 , - 2 , 1 , 2 }
 ;
 if ( s -> modified_quant ) {
 if ( get_bits1 ( & s -> gb ) ) s -> qscale = ff_modified_quant_tab [ get_bits1 ( & s -> gb ) ] [ s -> qscale ] ;
 else s -> qscale = get_bits ( & s -> gb , 5 ) ;
 }
 else s -> qscale += quant_tab [ get_bits ( & s -> gb , 2 ) ] ;
 ff_set_qscale ( s , s -> qscale ) ;
 }
static void h263_decode_dquant ( MpegEncContext * s ) {
 static const int8_t quant_tab [ 4 ] = {
 - 1 , - 2 , 1 , 2 }
 ;
 if ( s -> modified_quant ) {
 if ( get_bits1 ( & s -> gb ) ) s -> qscale = ff_modified_quant_tab [ get_bits1 ( & s -> gb ) ] [ s -> qscale ] ;
 else s -> qscale = get_bits ( & s -> gb , 5 ) ;
 }
 else s -> qscale += quant_tab [ get_bits ( & s -> gb , 2 ) ] ;
 ff_set_qscale ( s , s -> qscale ) ;
 }