(* * Copyright 2003 Savonet team * * This file is part of OCaml-Vorbis. * * OCaml-Vorbis 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-Vorbis 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-Vorbis; 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-Vorbis. * * @author Samuel Mimram, and many others... *) (* $Id: wav2ogg.ml 3816 2007-06-01 08:17:48Z smimram $ *) open Vorbis open Unix let src = ref "" let dst = ref "" let buflen = ref 1024 let input_string chan len = let ans = String.create len in (* TODO: check length *) ignore (input chan ans 0 len) ; 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 bitrate = ref 128000 let usage = "usage: wav2ogg [options] source destination" let _ = Arg.parse [ "--bitrate", Arg.Int (fun b -> bitrate := b * 1000), "Bitrate, in kilobits per second, defaults to 128kbps" ; "--buflen", Arg.Int (fun i -> buflen := i), "Size of chunks successively encoded" ] ( 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 bits = input_short ic in let fos buf = let len = String.length buf / (2 * channels) in let ans = Array.init channels (fun _ -> Array.create 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) <- float n /. 32768.; ans.(c).(i) <- max (-1.) (min 1. ans.(c).(i)) done; done; ans in let enc = Encoder.create channels infreq (-1) !bitrate (-1) in let os = Ogg.Stream.create () in let encode buf = let fbuf = fos buf in Encoder.encode_buffer_float enc os fbuf 0 (Array.length fbuf.(0)) in let start = Unix.time () in Printf.printf "Input detected: PCM WAVE %d channels, %d Hz, %d bits\n%!" channels infreq bits; Printf.printf "Encoding to: OGG %d channels, %d Hz, %d kbps\nPlease wait...\n%!" channels infreq !bitrate; Encoder.headerout enc os ["ARTIST", "test"]; if input_string ic 4 <> "data" then invalid_arg "No data tag"; (* This ensures the actual audio data will start on a new page, as per * spec. *) output_string oc (Ogg.Stream.flush os); let buflen = !buflen in let buf = String.create buflen in begin try while true do really_input ic buf 0 buflen; encode buf; output_string oc (Ogg.Stream.pagesout os); done; with End_of_file -> () end; Encoder.end_of_stream enc os; output_string oc (Ogg.Stream.pagesout os); close_in ic; close_out oc; Printf.printf "Finished in %.0f seconds.\n" ((Unix.time ())-.start); Gc.full_major ()