(**
 	Module: Interpreter	
	Description: Input wave -> interpretation -> output wave
	@author WANG Haisheng	
	Created: 15/05/2013	Modified: 14/08/2013
*)

open Aux;;
open Process;;
open Faustio;;

exception Missing_Expression;;

let version = "Faustine: 0.0.1";;

let set_GC () = 
	let _ = Gc.set { (Gc.get()) 
		       with Gc.minor_heap_size = 0xFFFFFF } in
	let _ = Gc.set { (Gc.get()) 
		       with Gc.major_heap_increment = 0xFFFFFF } in
	let _ = Gc.set { (Gc.get()) 
		       with Gc.space_overhead = 100 } in
	let _ = Gc.set { (Gc.get()) 
		       with Gc.max_overhead = 0xFFFFF } in
	let _ = Gc.set { (Gc.get()) 
		       with Gc.stack_limit = 0xFFFFF } in
	let _ = Gc.set { (Gc.get()) 
		       with Gc.allocation_policy = 0 } in
	() ;;

let path_dsp = ref "";;
let size_input = ref 0;;
let inputs = ref [];;
let time_max = ref 0xFFFF;;
let dir_output = ref "../output_sounds/";;
let format_output = ref "wav";;
let basename_output = ref "output";;

let option_usage = "usage: " ^ Sys.argv.(0) 
  ^ " [-d dsp_src] [-i input] [-t time] [--odir dir] [--oformat wav/csv] [--obasename name]";;

let option_unknown = 
  fun x -> raise (Arg.Bad ("Bad argument : " ^ x))

let speclist = [
  ("-d", Arg.String (fun s -> path_dsp := s), ": set dsp source file");
  ("-i", Arg.String (fun s -> incr size_input; inputs := !inputs @ [s]), ": set input wave file");
  ("-t", Arg.Int (fun i -> time_max := i), ": set max output length");
  ("--odir", Arg.String (fun s -> dir_output := s), ": set output directory");
  ("--oformat", Arg.String (fun s -> format_output := s), ": set output format");
  ("--obasename", Arg.String (fun s -> basename_output := s), ": set output basename");
  ];;
 

let main () = 

	let () = Arg.parse speclist option_unknown option_usage in
        let _ = Sys.signal Sys.sigalrm Sys.Signal_ignore in
	let _ = set_GC () in
	let io = new iomanager in
	let () = io#set !dir_output !format_output !basename_output in


	let () = print_string("    Faustine -> Reading input ...") in
	let tic0 = Sys.time () in
	let input = io#read !inputs in
	let toc0 = Sys.time () in
	let () = print_endline(" Done. (duration: " ^ (string_of_float (toc0 -. tic0)) ^ "s.)") in


	let () = print_string("    Faustine -> Preprocessing...") in
	let tic1 = Sys.time () in
	let faust_core = Preprocess.preprocess !path_dsp in
	let toc1 = Sys.time () in
	let () = print_endline(" Done. (duration: " ^ (string_of_float (toc1 -. tic1)) ^ "s.)") in


	let () = print_string("    Faustine -> Constructing process...") in
	let tic2 = Sys.time () in
	let faust_exp = exp_of_string faust_core in
	let proc = (new proc_factory)#make faust_exp in
	let toc2 = Sys.time () in
	let () = print_endline(" Done. (duration: " ^ (string_of_float (toc2 -. tic2)) ^ "s.)") in


	let () = print_string("    Faustine -> Evaluating...") in
	let tic3 = Sys.time () in
	let output = proc#eval input in
	let toc3 = Sys.time () in
	let () = print_endline(" Done. (duration: " ^ (string_of_float (toc3 -. tic3)) ^ "s.)") in


	let () = print_string("    Faustine -> Calculating...") in
	let tic4 = Sys.time () in
	let data = output#output !time_max in
	let rates = output#frequency in
	let toc4 = Sys.time () in
	let () = print_endline(" Done. (duration: " ^ (string_of_float (toc4 -. tic4)) ^ "s.)") in


	let () = print_string("    Faustine -> Writing output...") in
	let tic5 = Sys.time () in
	let output_paths = io#write rates data in
	let toc5 = Sys.time () in
	let () = print_endline(" Done. (duration: " ^ (string_of_float (toc5 -. tic5)) ^ "s.)") in

	let _ = Array.map print_endline 
	    (Array.map decorate output_paths) in
	();;

main();;