X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/e1705e136ab823be2e76e63728db1a5359d5d443..84216a960fd7a1334db3d5d519dfb72a0671a55a:/interpretor/beam.ml

diff --git a/interpretor/beam.ml b/interpretor/beam.ml
index 33fb08e..b66ac2b 100644
--- a/interpretor/beam.ml
+++ b/interpretor/beam.ml
@@ -7,35 +7,102 @@
 
 exception Beam_matching of string;;
 
+open Types;;
+open Basic;;
+open Value;;
 open Signal;;
 
 class beam : signal_type array -> beam_type = 
-  fun (sa_init : signal_type array) ->
+  fun (signals_init : signal_type array) ->
     object (self)
-      val sa = sa_init
-      val l = Array.length sa
+      val signals = signals_init
 
-      method get = sa
-
-      method length = l
+      method get = signals
+      method width = Array.length signals
 
       method sub : int -> int -> beam_type = 
 	fun start ->
 	  fun len ->
 	    new beam (Array.sub self#get start len)
 
+      method cut : int -> beam_type * beam_type =
+	fun (cut_width : int)->
+	  ((self#sub 0 cut_width),(self#sub cut_width (self#width - cut_width))) 
+
       method append : beam_type -> beam_type =
-	fun b -> 
-	  new beam (Array.append self#get b)
+	fun (b : beam_type) -> 
+	  new beam (Array.append self#get b#get)
+
+      method private add_memory : int -> unit =
+	fun (window : int) ->
+	  let signal_add_memory : int -> signal_type -> unit = 
+	    fun (l : int) ->
+	      fun (s : signal) ->
+		s#add_memory l in
+	  let _ = Array.map (signal_add_memory window) self#get in ()
 	  
-      method matching : int -> beam_type
+      method matching : int -> beam_type = 
 	  fun size ->
-	    if size = self#length then self
-	    else if size > self#length && size mod self#length = 0 then
-	      
-	    else if size < self#length && self#length mod size = 0 then
-	      
+	    if size = self#width then new beam self#get
+
+	    else if (size > self#width) && (size mod self#width = 0) then
+	      let () = self#add_memory 1 in
+	      let split_signals = 
+		Array.concat (Array.to_list 
+		     (Array.make (size/self#width) self#get)) in
+	      new beam split_signals
+
+	    else if (size < self#width) && (self#width mod size = 0) then
+	      let rec merge_rec  = 
+		fun (sa : signal_type array) ->
+		  fun (l : int) ->
+		    fun (i : int) ->
+		      if i + l < Array.length sa then
+			(sa.(i))#add (merge_rec sa l (i + l))
+		      else sa.(i) in
+	      let merge_signals = Array.init size (merge_rec self#get size) in	
+	      new beam merge_signals
+
 	    else raise (Beam_matching "matching size error")
 
+      method at : time -> value_type array = 
+	fun t ->
+	  let signal_at = fun (t : time) -> fun (s : signal_type) -> s#at t in
+	  Array.map (signal_at t) self#get
+
+      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 value2float = fun (v : value_type) -> v#to_float_array in
+            let init = [|0.|] in
+	    let container = Array.make length_max 
+		(Array.make self#width init) in
+	    let index = ref 0 in
+
+	    try
+	      while !index < length_max do
+		container.(!index) <- Array.map value2float (self#at !index);
+		incr index;
+	      done;
+	      transpose container
+
+	    with x ->
+		match x with
+		| Invalid_argument s -> 
+		    transpose (Array.sub container 0 !index)
+		| _ -> raise x
+
+      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