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Asterisk raw format

--- a/soxformat.7

+++ b/soxformat.7

@@ -556,6 +556,10 @@

 Sound Description Interchange Format). Used by academic music software

 such as the CSound package, and the MixView sound sample editor.

 .TP

+\&\fB.sln\fR

+Asterisk PBX `signed linear' 8khz, 16-bit signed integer, little-endian

+raw format.

+.TP

 \&\fB.sph\fR, \fB.nist\fR (also with \fB\-t sndfile\fR)

 SPHERE (SPeech HEader Resources) is a file format defined by NIST

 (National Institute of Standards and Technology) and is used with

--- a/src/raw-fmt.c

+++ b/src/raw-fmt.c

@@ -1,4 +1,4 @@

-/* libSoX file formats: raw         (c) 2007-8 SoX contributors

+/* libSoX file formats: raw         (c) 2007-11 SoX contributors

  *

  * This library is free software; you can redistribute it and/or modify it

  * under the terms of the GNU Lesser General Public License as published by

@@ -36,6 +36,26 @@

     raw_start, lsx_rawread , NULL,

     raw_start, lsx_rawwrite, NULL,

     lsx_rawseek, encodings, NULL, 0

+  };

+  return &handler;

+}

+

+static int sln_start(sox_format_t * ft)

+{

+  return lsx_check_read_params(ft, 1, 8000., SOX_ENCODING_SIGN2, 16, (uint64_t)0, sox_false);

+}

+

+LSX_FORMAT_HANDLER(sln)

+{

+  static char const * const names[] = {"sln", NULL};

+  static unsigned const write_encodings[] = {SOX_ENCODING_SIGN2, 16, 0, 0};

+  static sox_rate_t const write_rates[] = {8000, 0};

+  static sox_format_handler_t handler = {SOX_LIB_VERSION_CODE,

+    "Asterisk PBX headerless format",

+    names, SOX_FILE_LIT_END|SOX_FILE_MONO,

+    sln_start, lsx_rawread, NULL,

+    NULL, lsx_rawwrite, NULL,

+    lsx_rawseek, write_encodings, write_rates, 0

   };

   return &handler;

 }