interpreter/lib/src/libsndfile-ocaml/sndfile.ml

   1 (*
   2 ** File: sndfile.ml
   3 **
   4 **      Copyright (c) 2006, 2007 Erik de Castro Lopo <erikd at mega-nerd dot com>
   5 **      WWW: http://www.mega-nerd.com/libsndfile/Ocaml/
   6 **
   7 **      This library is free software; you can redistribute it and/or
   8 **      modify it under the terms of the GNU Lesser General Public
   9 **      License as published by the Free Software Foundation; either
  10 **      version 2 of the License, or (at your option) any later version.
  11 **
  12 **      This library is distributed in the hope that it will be useful,
  13 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 **      Lesser General Public License for more details.
  16 **
  17 **      You should have received a copy of the GNU Lesser General Public
  18 **      License along with this library; if not, write to the Free Software
  19 **      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20 *)
  21
  22 type open_mode_t =
  23         |       READ
  24         |       WRITE
  25         |       RDWR
  26
  27 type seek_mode_t =
  28         |       SEEK_SET
  29         |       SEEK_CUR
  30         |       SEEL_END
  31
  32 type major_format_t =
  33         |       MAJOR_NONE
  34         |       MAJOR_WAV
  35         |       MAJOR_AIFF
  36         |       MAJOR_AU
  37         |       MAJOR_RAW
  38         |       MAJOR_PAF
  39         |       MAJOR_SVX
  40         |       MAJOR_NIST
  41         |       MAJOR_VOC
  42         |       MAJOR_IRCAM
  43         |       MAJOR_W64
  44         |       MAJOR_MAT4
  45         |       MAJOR_MAT5
  46         |       MAJOR_PVF
  47         |       MAJOR_XI
  48         |       MAJOR_HTK
  49         |       MAJOR_SDS
  50         |       MAJOR_AVR
  51         |       MAJOR_WAVEX
  52         |       MAJOR_SD2
  53         |       MAJOR_FLAC
  54         |       MAJOR_CAF
  55
  56 type minor_format_t =
  57         |       MINOR_NONE
  58         |       MINOR_PCM_S8
  59         |       MINOR_PCM_16
  60         |       MINOR_PCM_24
  61         |       MINOR_PCM_32
  62         |       MINOR_PCM_U8
  63         |       MINOR_FLOAT
  64         |       MINOR_DOUBLE
  65         |       MINOR_ULAW
  66         |       MINOR_ALAW
  67         |       MINOR_IMA_ADPCM
  68         |       MINOR_MS_ADPCM
  69         |       MINOR_GSM610
  70         |       MINOR_VOX_ADPCM
  71         |       MINOR_G721_32
  72         |       MINOR_G723_24
  73         |       MINOR_G723_40
  74         |       MINOR_DWVW_12
  75         |       MINOR_DWVW_16
  76         |       MINOR_DWVW_24
  77         |       MINOR_DWVW_N
  78         |       MINOR_DPCM_8
  79         |       MINOR_DPCM_16
  80
  81 type endianness_t =
  82         |       ENDIAN_FILE
  83         |       ENDIAN_LITTLE
  84         |       ENDIAN_BIG
  85         |       ENDIAN_CPU
  86
  87
  88 type file_format_t
  89
  90 type error =
  91         |       No_error
  92         |       Unrecognised_format
  93         |       System
  94         |       Malformed_file
  95         |       Unsupported_encoding
  96         |       Internal
  97
  98 exception Error of (error * string)
  99
 100 type t
 101
 102 external format_e : major_format_t -> minor_format_t -> endianness_t -> file_format_t = "caml_sf_format_e"
 103
 104 let format major minor =
 105         format_e major minor ENDIAN_FILE
 106
 107 external open_private :
 108         string -> (* filename *)
 109         open_mode_t ->
 110         file_format_t ->
 111         int -> (* channels *)
 112         int -> (* samplerate *)
 113         t = "caml_sf_open_private"
 114
 115 let bad_format = format MAJOR_NONE MINOR_NONE
 116
 117 let openfile ?(info = (READ, bad_format, 0, 0)) filename =
 118         let (mode, fmt, channels, samplerate) = info in
 119         open_private filename mode fmt channels samplerate
 120
 121 external close : t -> unit = "caml_sf_close"
 122
 123 external read : t -> float array -> int = "caml_sf_read"
 124 external write : t -> float array -> int = "caml_sf_write"
 125
 126
 127 external frames : t -> Int64.t = "caml_sf_frames"
 128
 129 external samplerate : t -> int = "caml_sf_samplerate"
 130
 131 external channels : t -> int = "caml_sf_channels"
 132
 133 external seek : t -> Int64.t -> seek_mode_t -> Int64.t = "caml_sf_seek"
 134
 135 external compare : t -> t -> int = "caml_sf_compare"
 136
 137 let _ =
 138         Callback.register_exception "sndfile_open_exn" (Error (No_error, "No error."))