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(*
* Copyright 2008 Savonet team
*
* This file is part of ocaml-speex.
*
* ocaml-speex is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* ocaml-speex is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with ocaml-speex; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
(**
* An wav to ogg converter using ocaml-speex.
*
* @author Samuel Mimram, Romain Beauxis, and many others...
*)
open Speex
let src = ref ""
let dst = ref ""
let input_string chan len =
let ans = Bytes.create len in
really_input chan ans 0 len;
Bytes.to_string ans
let input_int chan =
let buf = input_string chan 4 in
int_of_char buf.[0]
+ (int_of_char buf.[1] lsl 8)
+ (int_of_char buf.[2] lsl 16)
+ (int_of_char buf.[3] lsl 24)
let input_short chan =
let buf = input_string chan 2 in
int_of_char buf.[0] + (int_of_char buf.[1] lsl 8)
let usage = "usage: wav2speex [options] source destination"
let float = ref false
let mode = ref Wideband
let fpp = ref 5
let vbr = ref false
let quality = ref 7
let _ =
let f = Printf.sprintf in
let string_of_mode m =
match m with
| Narrowband -> "narrowband"
| Wideband -> "wideband"
| Ultra_wideband -> "ultra-wideband"
in
Arg.parse
[
( "--float",
Arg.Unit (fun _ -> float := true),
f "Use floats for decoding. Default: %b" !float );
( "--mode",
Arg.String
(fun b ->
match b with
| "narrowband" -> mode := Narrowband
| "wideband" -> mode := Wideband
| "ultra-wideband" -> mode := Ultra_wideband
| _ -> failwith "unkown mode"),
f
"Encoding mode, one of \"narrowband\", \"wideband\" or \
\"ultra-wideband\". Default: %s"
(string_of_mode !mode) );
( "--frame_per_packet",
Arg.Int (fun b -> fpp := b),
f "Frames per Ogg packet. Default: %i" !fpp );
( "--vbr",
Arg.Unit (fun _ -> vbr := true),
f "Encode in vbr mode. Default: %b" !vbr );
( "--quality",
Arg.Int (fun b -> quality := b),
f "Encoding bitrate, in Kbps. Default: %i" !quality );
]
(let pnum = ref (-1) in
fun s ->
incr pnum;
match !pnum with
| 0 -> src := s
| 1 -> dst := s
| _ ->
Printf.eprintf "Error: too many arguments\n";
exit 1)
usage;
if !src = "" || !dst = "" then (
Printf.printf "%s\n" usage;
exit 1);
let ic = open_in_bin !src in
let oc = open_out_bin !dst in
(* TODO: improve! *)
if input_string ic 4 <> "RIFF" then invalid_arg "No RIFF tag";
ignore (input_string ic 4);
if input_string ic 4 <> "WAVE" then invalid_arg "No WAVE tag";
if input_string ic 4 <> "fmt " then invalid_arg "No fmt tag";
let _ = input_int ic in
let _ = input_short ic in
(* TODO: should be 1 *)
let channels = input_short ic in
let infreq = input_int ic in
let _ = input_int ic in
(* bytes / s *)
let _ = input_short ic in
(* block align *)
let ibits = input_short ic in
if input_string ic 4 <> "data" then invalid_arg "No data tag";
let _ = input_int ic in
(* datalen *)
let fos buf =
let len = String.length buf / (2 * channels) in
let ans = Array.init channels (fun _ -> Array.make len 0) in
for i = 0 to len - 1 do
for c = 0 to channels - 1 do
let n =
int_of_char buf.[(2 * channels * i) + (2 * c)]
+ (int_of_char buf.[(2 * channels * i) + (2 * c) + 1] lsl 8)
in
let n =
if n land (1 lsl 15) = 0 then n
else (n land 0b111111111111111) - 32768
in
ans.(c).(i) <- max (-32768) (min 32767 n)
done
done;
ans
in
let enc = Encoder.init !mode !fpp in
if not !vbr then Encoder.set enc SPEEX_SET_QUALITY !quality
else Encoder.set enc SPEEX_SET_VBR_QUALITY !quality;
Encoder.set enc SPEEX_SET_SAMPLING_RATE infreq;
let ivbr = if !vbr then 1 else 0 in
Encoder.set enc SPEEX_SET_VBR ivbr;
let fsize = Encoder.get enc SPEEX_GET_FRAME_SIZE in
let os = Ogg.Stream.create () in
let header =
Header.init ~rate:infreq ~nb_channels:channels ~mode:!mode ~vbr:!vbr
~frames_per_packet:!fpp ()
in
Header.encode_header header [] os;
let s_o_f (h, b) = h ^ b in
let flush s =
let rec f v =
try
let v = v ^ s_o_f (Ogg.Stream.flush_page s) in
f v
with Ogg.Not_enough_data -> v
in
f ""
in
output_string oc (flush os);
let start = Unix.time () in
let smode =
match !mode with
| Narrowband -> "narrowband"
| Wideband -> "wideband"
| Ultra_wideband -> "ultra-wideband"
in
Printf.printf "Input detected: PCM WAVE %d channels, %d Hz, %d bits\n%!"
channels infreq ibits;
Printf.printf
"Encoding to: SPEEX %d channels, %d Hz, %s, VBR: %s\nPlease wait...\n%!"
channels infreq smode (string_of_bool !vbr);
begin
try
while true do
let buflen = 2 * fsize * channels in
let buf = Bytes.create buflen in
let feed () =
really_input ic buf 0 buflen;
let buf = Bytes.to_string buf in
let fbuf = fos buf in
assert (Array.length fbuf.(0) = fsize);
fbuf
in
let h, v =
if channels = 1 then (
let feed () =
let frame = feed () in
frame.(0)
in
if !float then (
let feed () = Array.map float_of_int (feed ()) in
Encoder.encode_page enc os feed)
else Encoder.encode_page_int enc os feed)
else if !float then (
let feed () =
Array.map (fun x -> Array.map float_of_int x) (feed ())
in
Encoder.encode_page_stereo enc os feed)
else Encoder.encode_page_int_stereo enc os feed
in
output_string oc (h ^ v)
done
with End_of_file -> ()
end;
List.iter
(fun (ph, pb) -> output_string oc (ph ^ pb))
(Ogg.Stream.terminate os);
close_in ic;
close_out oc;
Printf.printf "Finished in %.0f seconds.\n" (Unix.time () -. start);
Gc.full_major ()
|
