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 Basic;;
  10 open Value;;
  11 open Signal;;
  12 open Beam;;
  13 open Aux;;
  14
  15 let default_output_path = "../output_sounds/";;
  16
  17 class virtual io =
  18   object
  19     method virtual read : string array -> beam
  20     method virtual write : int array -> float array array array -> string array
  21     method private concat : float array array array -> float array array =
  22       fun (origin : float array array array) ->
  23         Array.map Array.concat (Array.map Array.to_list origin)
  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
  38                 (Array.map Sndfile.frames files) in
  39             let rates = Array.map Sndfile.samplerate files in
  40             let create_container = fun l -> Array.create l 1. in
  41             let containers = Array.map create_container frames in
  42             let _ = array_map2 Sndfile.read files containers in
  43             let _ = Array.map Sndfile.close files in
  44             let stream2func =
  45               fun stream -> fun t -> new value (R stream.(t)) in
  46             array_map2 (new signal) rates (Array.map stream2func containers) in
  47           new beam signals
  48
  49     method write : int array -> float array array array -> string array =
  50       fun (rates : int array) ->
  51         fun (output : float array array array) ->
  52           let () = print_string("    Faustine -> Writing wave files...") in
  53           let tic = Sys.time () in
  54
  55           let n = Array.length output in
  56           let paths = Array.init n (fun i ->
  57             default_output_path ^ "output" ^ (string_of_int (i + 1)) ^ ".wav") in
  58
  59           let files =
  60             let channels =
  61               let get_channel = fun s ->
  62                 let l = Array.length s in
  63                 Array.length s.(l - 1) in
  64               Array.map get_channel output in
  65             let file_format = Sndfile.format
  66                 Sndfile.MAJOR_WAV Sndfile.MINOR_PCM_16 in
  67             let openwr = fun path -> fun channel -> fun rate ->
  68               Sndfile.openfile ~info:(Sndfile.RDWR, file_format, channel, rate) path in
  69             array_map3 openwr paths channels rates in
  70
  71           let () =
  72             let data = self#concat output in
  73             let _ = array_map2 Sndfile.write files data in
  74             let _ = Array.map Sndfile.close files in
  75             let toc = Sys.time () in
  76             let duration = toc -. tic in
  77             print_endline
  78               (" Done. (duration: " ^ (string_of_float duration) ^ "s)") in
  79           paths
  80   end;;
  81
  82
  83 (*
  84 class csvio : io_type =
  85   object (self)
  86     inherit io
  87     method private csvread =
  88     method read : string array -> beam =
  89
  90
  91
  92     method write : value_type array array -> string array
  93   end;;
  94 *)
  95
  96
  97 (*
  98 let csvread = fun (ic : in_channel) ->
  99   let string_list = ref [] in
 100   try
 101     while true do
 102       string_list := !string_list @ [(input_line ic)]
 103     done;
 104     [||]
 105   with End_of_file ->
 106     (*let () = print_endline(List.nth !string_list 0) in*)
 107     Array.of_list (List.map float_of_string !string_list);;
 108
 109 let read_input_csv = fun argv ->
 110         let n_input = (Array.length argv) - 4 in
 111         if n_input < 0 then
 112                 raise (Invalid_argument "xxx")
 113         else if n_input = 0 then
 114                 ([], [])
 115         else
 116                 (* open csv file *)
 117                 let file_string_array = Array.sub argv 4 n_input in
 118                 let make_chemin s = io_macro_to_string Input_Route_string ^ s in
 119                 let file_chemin_string_array = Array.map make_chemin file_string_array in
 120                 let file_array = Array.map open_in file_chemin_string_array in
 121                 let file_list = Array.to_list file_array in
 122
 123                 (* read sample rates and data *)
 124                 let rate_list = Array.to_list (Array.create n_input 0) in
 125                 let data_float_array_list = List.map csvread file_list in
 126                 let _ = List.map close_in file_list in
 127                 (rate_list, data_float_array_list);;
 128
 129
 130 let write_output_csv = fun channel_int_list -> fun data_float_array_list ->
 131         let () = print_string("    Faustine -> Writing csv files...") in
 132         let tic = Sys.time () in
 133
 134         (* make output txt file names : output0, output1, ... *)
 135         let n_output = List.length data_float_array_list in
 136         let n_array = Array.init n_output (fun n -> n) in
 137         let make_file_name i = "output" ^ (string_of_int i) ^ ".csv" in
 138
 139         (* make output wave file routes *)
 140         let make_chemin s = io_macro_to_string Output_Route_string ^ s in
 141         let file_name_string_array = Array.map make_file_name n_array in
 142         let file_chemin_string_array = Array.map make_chemin file_name_string_array in
 143         let file_chemin_string_list = Array.to_list file_chemin_string_array in
 144
 145         (* open output channels *)
 146         let file_list = List.map open_out file_chemin_string_list in
 147         let data_string_array_list = List.map (Array.map string_of_float) data_float_array_list in
 148         let array_to_string = fun data_string_array -> fun channel_int ->
 149           let data_length = Array.length data_string_array in
 150           let rec to_string_rec =
 151             fun data -> fun channel -> fun n -> fun i -> fun column ->
 152               if i < n then
 153                 (
 154                 let element = data.(i) in
 155                 if column < (channel - 1) then
 156                   element ^ "," ^ (to_string_rec data channel n (i + 1) (column + 1))
 157                 else if column = (channel - 1) then
 158                   element ^ "\n" ^ (to_string_rec data channel n (i + 1) 0)
 159                 else raise (Invalid_argument "write_output_txt.")
 160                     )
 161               else "" in
 162           to_string_rec data_string_array channel_int data_length 0 0 in
 163
 164         let data_string_list = List.map2 array_to_string data_string_array_list channel_int_list in
 165         let _ = List.map2 output_string file_list data_string_list in
 166         let _ = List.map close_out file_list in
 167         let toc = Sys.time () in
 168         print_endline(" Done. (duration: " ^ (string_of_float (toc -. tic)) ^ "s)");;
 169
 170 *)