add U16view, I16view, U32view, I32view classes

res/scripts/hud.lua

@@ -124,10 +124,11 @@ function on_hud_open()
     streamid = audio.play_stream_2d("test-stream", 2.0, 1.0, "ui")
 
 
-    s = audio.PCMStream(44100, 1, 8)
-    local buffer = Bytearray(44100)
-    for i=1, #buffer do
-        buffer[i] = math.random(1, 8)
+    s = audio.PCMStream(44100, 1, 16)
+    local buffer = Bytearray(44100 * 4)
+    local view = U16view(buffer)
+    for i=1, view.size do
+        view[i] = 16000 + math.sin(i / 200.0 * (1 + i * 0.0001)) * 2000
     end
     s:feed(buffer)
     s:create_sound("test-sound")

res/scripts/stdmin.lua

@@ -269,6 +269,10 @@ require "core:internal/extensions/string"
 local bytearray = require "core:internal/bytearray"
 Bytearray = bytearray.FFIBytearray
 Bytearray_as_string = bytearray.FFIBytearray_as_string
+U16view = bytearray.FFIU16view
+I16view = bytearray.FFII16view
+U32view = bytearray.FFIU32view
+I32view = bytearray.FFII32view
 Bytearray_construct = function(...) return Bytearray(...) end
 
 bit.compile = require "core:bitwise/compiler"