interpretor/faustio.ml

   1 (**
   2         Module: Faustio
   3         Description: audio input/output, csv input/output
   4         @author WANG Haisheng
   5         Created: 12/08/2013     Modified: 13/08/2013
   6 *)
   7
   8 open Types;;
   9 open Beam;;
  10 open Aux;;
  11
  12 let default_output_path = "../output_sounds/";;
  13
  14 class virtual io =
  15   object
  16     method virtual read : string array -> beam
  17     method virtual write : int array -> value_type array array -> string array
  18     method private to_float : value_type array array -> float array array =
  19       fun (origin : value_type array array) ->
  20         let data =
  21           let value2float = fun (v : value_type) -> v#to_float_array in
  22           Array.map (Array.map value2float) origin in
  23         Array.map Array.concat (Array.map Array.to_list data)
  24   end;;
  25
  26 class waveio : io_type =
  27   object (self)
  28     inherit io
  29     method read : string array -> beam =
  30       fun (paths : string array) ->
  31         let n = Array.length paths in
  32         if n = 0 then
  33           new beam [||]
  34         else
  35           let signals =
  36             let files = Array.map Sndfile.openfile paths in
  37             let frames = Array.map Int64.to_int (Array.map Sndfile.frames files) in
  38             let rates = Array.map Sndfile.samplerate files in
  39             let create_container = fun l -> Array.create l 1. in
  40             let containers = Array.map create_container frames in
  41             let _ = array_map2 Sndfile.read files containers in
  42             let _ = Array.map Sndfile.close files in
  43             array_map2 (new signal) rates containers in
  44           new beam signals
  45
  46     method write : int array -> value_type array array -> string array =
  47       fun (rates : int array) ->
  48         fun (output : value_type array array) ->
  49           let () = print_string("    Faustine -> Writing wave files...") in
  50           let tic = Sys.time () in
  51
  52           let n = Array.length output in
  53           let paths = Array.init n (fun i ->
  54             default_output_path ^ "output" ^ (string_of_int i) ^ ".wav") in
  55
  56           let files =
  57             let channels =
  58               let get_channel = fun l -> fun s ->
  59                 match s.(l - 1)#get with
  60                 | Vec vec -> vec#size
  61                 | _ -> 1 in
  62               Array.map (get_channel n) output in
  63             let format = Sndfile.format Sndfile.MAJOR_WAV Sndfile.MINOR_PCM_16 in
  64             let openwr = fun path -> fun channel -> fun rate ->
  65               Sndfile.openfile ~info:(Sndfile.RDWR, format, channel, rate) path in
  66             array_map3 openwr paths channels rates in
  67
  68           let () =
  69             let data = self#to_float output in
  70             let _ = array_map2 Sndfile.write files data in
  71             let _ = Array.map Sndfile.close files in
  72             let toc = Sys.time () in
  73             let duration = toc -. tic in
  74             Print_endline
  75               (" Done. (duration: " ^ (string_of_float duration) ^ "s)") in
  76           paths
  77   end;;
  78
  79 (*
  80 class csvio : io_type =
  81   object (self)
  82     inherit io
  83     method private csvread =
  84     method read : string array -> beam =
  85
  86
  87
  88     method write : value_type array array -> string array
  89   end;;
  90 *)
  91
  92 let csvread = fun (ic : in_channel) ->
  93   let string_list = ref [] in
  94   try
  95     while true do
  96       string_list := !string_list @ [(input_line ic)]
  97     done;
  98     [||]
  99   with End_of_file ->
 100     (*let () = print_endline(List.nth !string_list 0) in*)
 101     Array.of_list (List.map float_of_string !string_list);;
 102
 103 let read_input_csv = fun argv ->
 104         let n_input = (Array.length argv) - 4 in
 105         if n_input < 0 then
 106                 raise Missing_Expression
 107         else if n_input = 0 then
 108                 ([], [])
 109         else
 110                 (* open csv file *)
 111                 let file_string_array = Array.sub argv 4 n_input in
 112                 let make_chemin s = io_macro_to_string Input_Route_string ^ s in
 113                 let file_chemin_string_array = Array.map make_chemin file_string_array in
 114                 let file_array = Array.map open_in file_chemin_string_array in
 115                 let file_list = Array.to_list file_array in
 116
 117                 (* read sample rates and data *)
 118                 let rate_list = Array.to_list (Array.create n_input 0) in
 119                 let data_float_array_list = List.map csvread file_list in
 120                 let _ = List.map close_in file_list in
 121                 (rate_list, data_float_array_list);;
 122
 123
 124 let write_output_csv = fun channel_int_list -> fun data_float_array_list ->
 125         let () = print_string("    Faustine -> Writing csv files...") in
 126         let tic = Sys.time () in
 127
 128         (* make output txt file names : output0, output1, ... *)
 129         let n_output = List.length data_float_array_list in
 130         let n_array = Array.init n_output (fun n -> n) in
 131         let make_file_name i = "output" ^ (string_of_int i) ^ ".csv" in
 132
 133         (* make output wave file routes *)
 134         let make_chemin s = io_macro_to_string Output_Route_string ^ s in
 135         let file_name_string_array = Array.map make_file_name n_array in
 136         let file_chemin_string_array = Array.map make_chemin file_name_string_array in
 137         let file_chemin_string_list = Array.to_list file_chemin_string_array in
 138
 139         (* open output channels *)
 140         let file_list = List.map open_out file_chemin_string_list in
 141         let data_string_array_list = List.map (Array.map string_of_float) data_float_array_list in
 142         let array_to_string = fun data_string_array -> fun channel_int ->
 143           let data_length = Array.length data_string_array in
 144           let rec to_string_rec =
 145             fun data -> fun channel -> fun n -> fun i -> fun column ->
 146               if i < n then
 147                 (
 148                 let element = data.(i) in
 149                 if column < (channel - 1) then
 150                   element ^ "," ^ (to_string_rec data channel n (i + 1) (column + 1))
 151                 else if column = (channel - 1) then
 152                   element ^ "\n" ^ (to_string_rec data channel n (i + 1) 0)
 153                 else raise (Invalid_argument "write_output_txt.")
 154                     )
 155               else "" in
 156           to_string_rec data_string_array channel_int data_length 0 0 in
 157
 158         let data_string_list = List.map2 array_to_string data_string_array_list channel_int_list in
 159         let _ = List.map2 output_string file_list data_string_list in
 160         let _ = List.map close_out file_list in
 161         let toc = Sys.time () in
 162         print_endline(" Done. (duration: " ^ (string_of_float (toc -. tic)) ^ "s)");;
 163