PlayerLayer create_player_layer_from_line_stream(LineStream *line_stream);
LayerPtr player_layer_as_layer(PlayerLayer *player_layer);
int player_layer_render(const PlayerLayer *player_layer,
PlayerLayer create_player_layer_from_line_stream(LineStream *line_stream);
LayerPtr player_layer_as_layer(PlayerLayer *player_layer);
int player_layer_render(const PlayerLayer *player_layer,