Version 0.1.1 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@95 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 92 insertions, 0 deletions

diff --git a/codecs/mp3/src/wcvt.c b/codecs/mp3/src/wcvt.c
new file mode 100755
index 000000000..d373cd694
--- /dev/null
+++ b/codecs/mp3/src/wcvt.c
@@ -0,0 +1,92 @@
+/*____________________________________________________________________________
+	
+	FreeAmp - The Free MP3 Player
+
+        MP3 Decoder originally Copyright (C) 1995-1997 Xing Technology
+        Corp.  http://www.xingtech.com
+
+	Portions Copyright (C) 1998 EMusic.com
+
+	This program 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.
+
+	This program 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 this program; if not, write to the Free Software
+	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	
+	$Id$
+____________________________________________________________________________*/
+
+/*---- wcvt.c --------------------------------------------
+
+conditional inclusion to wavep.c
+
+pcm conversion to wave format
+  for big endians or when sizeof(short) > 16 bits
+
+mod 1/9/97 warnings
+
+-----------------------------------------------------------*/
+static int bytes_per_samp = 1;
+static int big_ender;
+static int cvt_flag;
+
+/*-------------------------------------------------------*/
+void cvt_to_wave_init(int bits)
+{
+
+   big_ender = 1;
+   if ((*(unsigned char *) &big_ender) == 1)
+      big_ender = 0;
+
+/*--- printf("\n big_ender = %d", big_ender );  ---*/
+
+   if (bits == 8)
+      bytes_per_samp = 1;
+   else
+      bytes_per_samp = sizeof(short);
+
+
+   cvt_flag = 0;
+   if (bits > 8)
+   {
+      if (big_ender)
+	 cvt_flag = 1;
+      cvt_flag |= (sizeof(short) > 2);
+   }
+
+}
+/*-------------------------------------------------------*/
+unsigned int cvt_to_wave(unsigned char *pcm, unsigned int bytes_in)
+{
+   unsigned int i, k;
+   unsigned int nsamp;
+   short tmp;
+   unsigned short *w;
+
+// printf("\n wave convert");
+
+   if (cvt_flag == 0)
+      return bytes_in;
+/*-- no conversion required --*/
+
+   nsamp = bytes_in / bytes_per_samp;
+   w = (unsigned short *) pcm;
+   for (i = 0, k = 0; i < nsamp; i++, k += 2)
+   {
+      tmp = w[i];
+      pcm[k] = (unsigned char) tmp;
+      pcm[k + 1] = (unsigned char) (tmp >> 8);
+   }
+
+   return (nsamp << 1);
+/*--- return bytes out ---*/
+}
+/*-------------------------------------------------------*/