codec: cc: only decode valid captions

required to remove cc filtering ahead
videolan · Sep 23, 2016 · 67dd763 · 67dd763
1 parent aeb5eea
commit 67dd763
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/modules/codec/cc.c b/modules/codec/cc.c
@@ -467,7 +467,8 @@ static subpicture_t *Convert( decoder_t *p_dec, block_t **pp_block )
     while( p_block->i_buffer >= 3 && !(i_status & EIA608_STATUS_DISPLAY) )
     {
         /* Mask off the specific i_field bit, else some sequences can be lost. */
-        if ( (p_block->p_buffer[0] & 0x01) == p_sys->i_field )
+        if ( (p_block->p_buffer[0] & 0x01) == p_sys->i_field &&
+             (p_block->p_buffer[0] & 0x04) /* Valid bit */ )
             i_status = Eia608Parse( &p_sys->eia608, p_sys->i_channel, &p_block->p_buffer[1] );
 
         p_block->i_buffer -= 3;