@ -56,11 +56,12 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
int w , h , x , y , i ;
int64_t packet_time = 0 ;
GetBitContext gb ;
int has_alpha = avctx - > codec_tag = = MKTAG ( ' D ' , ' X ' , ' S ' , ' A ' ) ;
memset ( sub , 0 , sizeof ( * sub ) ) ;
// check that at least header fits
if ( buf_size < 27 + 7 * 2 + 4 * 3 ) {
if ( buf_size < 27 + 7 * 2 + 4 * ( 3 + has_alpha ) ) {
av_log ( avctx , AV_LOG_ERROR , " coded frame too small \n " ) ;
return - 1 ;
}
@ -107,9 +108,15 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
// read palette
for ( i = 0 ; i < sub - > rects [ 0 ] - > nb_colors ; i + + )
( ( uint32_t * ) sub - > rects [ 0 ] - > pict . data [ 1 ] ) [ i ] = bytestream_get_be24 ( & buf ) ;
// make all except background (first entry) non-transparent
for ( i = 1 ; i < sub - > rects [ 0 ] - > nb_colors ; i + + )
( ( uint32_t * ) sub - > rects [ 0 ] - > pict . data [ 1 ] ) [ i ] | = 0xff000000 ;
if ( ! has_alpha ) {
// make all except background (first entry) non-transparent
for ( i = 1 ; i < sub - > rects [ 0 ] - > nb_colors ; i + + )
( ( uint32_t * ) sub - > rects [ 0 ] - > pict . data [ 1 ] ) [ i ] | = 0xff000000 ;
} else {
for ( i = 0 ; i < sub - > rects [ 0 ] - > nb_colors ; i + + )
( ( uint32_t * ) sub - > rects [ 0 ] - > pict . data [ 1 ] ) [ i ] | = * buf + + < < 24 ;
}
// process RLE-compressed data
init_get_bits ( & gb , buf , ( buf_end - buf ) * 8 ) ;