Csv IO class implemented.

[Faustine.git] / interpretor / beam.ml

diff --git a/interpretor/beam.ml b/interpretor/beam.ml
index fe3ac61..273ae1c 100644 (file)
--- a/interpretor/beam.ml
+++ b/interpretor/beam.ml
@@ -70,34 +70,46 @@ class beam : signal_type array -> beam_type =
          let signal_at = fun (t : time) -> fun (s : signal_type) -> s#at t in
          Array.map (signal_at t) self#get
 
-      method output : int -> value_type array array = 
+      method output : int -> float array array array = 
          fun (length_max : int) ->
            let transpose : 'a array array -> 'a array array = 
              fun matrix ->
                let get_element = fun i -> fun array -> array.(i) in
                let get_column = fun m -> fun i -> Array.map (get_element i) m in
                Array.init self#width (get_column matrix) in
-            let value_init = new value Error in
+           let value2float = fun (v : value_type) -> v#to_float_array in
+            let init = [|0.|] in
            let container = Array.make length_max 
-               (Array.make self#width value_init) in
+               (Array.make self#width init) in
            let index = ref 0 in
 
            try
              while !index < length_max do
-               container.(!index) <- self#at !index;
+               container.(!index) <- Array.map value2float (self#at !index);
                incr index;
              done;
              transpose container
-           with x ->
 
+           with x ->
              let error_message = 
                match x with
                | Convert_Error s -> "Convert_Error: " ^ s
                | Basic_operation s -> "Basic_operation: " ^ s
                | Signal_operation s -> "Signal_operation: " ^ s
                | Beam_matching s -> "Beam_Matching_Error: " ^ s
-               | _ -> "Compute finished."
+               | Invalid_argument s -> "Compute finished."
+               | _ -> "Unknown error"
              in
              let () = print_string error_message in
              transpose (Array.sub container 0 !index)
+
+      method frequency : int array = 
+       let each_rate : signal -> int = 
+         fun (s : signal) -> 
+           let rate = s#frequency in
+           if rate > 0 then rate
+           else if rate = 0 then 44100
+           else raise (Beam_matching "frequency error.") in    
+       Array.map each_rate self#get 
+
     end