static void set_default_style(ASS_Style *style)
{
    style->Name             = strdup("Default");
    style->FontName         = strdup("Arial");
    style->FontSize         = 18;
    style->PrimaryColour    = 0xffffff00;
    style->SecondaryColour  = 0x00ffff00;
    style->OutlineColour    = 0x00000000;
    style->BackColour       = 0x00000080;
    style->Bold             = 200;
    style->ScaleX           = 1.0;
    style->ScaleY           = 1.0;
    style->Spacing          = 0;
    style->BorderStyle      = 1;
    style->Outline          = 2;
    style->Shadow           = 3;
    style->Alignment        = 2;
    style->MarginL = style->MarginR = style->MarginV = 20;
}
static void set_default_style(ASS_Style *style)
{
    style->Name             = strdup("Default");
    style->FontName         = strdup("Arial");
    style->FontSize         = 18;
    style->PrimaryColour    = 0xffffff00;
    style->SecondaryColour  = 0x00ffff00;
    style->OutlineColour    = 0x00000000;
    style->BackColour       = 0x00000080;
    style->Bold             = 200;
    style->ScaleX           = 1.0;
    style->ScaleY           = 1.0;
    style->Spacing          = 0;
    style->BorderStyle      = 1;
    style->Outline          = 2;
    style->Shadow           = 3;
    style->Alignment        = 2;
    style->MarginL = style->MarginR = style->MarginV = 20;
}