Merge changes from team/russell/codec_resample

This commit imports libresample for use in Asterisk.  It also adds a new codec
module, codec_resample.  This module uses libresample to re-sample signed linear
audio between 8 kHz and 16 kHz.

It also provides an alternative for converting between 16 kHz G.722 and 8 kHz
signed linear when using G.722, which will likely be useful as some people have
complained about volume issues when the current codec_g722 converts to 8 kHz 
signed linear.  But, to test this, you will have to disable the g722-to-slin and
g722-to-slin16 translators in codec_g722.c.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@95501 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/libresample/win/libresample.dsp

@@ -0,0 +1,116 @@
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+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
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+CFG=libresample - Win32 Debug
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "libresample.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "libresample.mak" CFG="libresample - Win32 Debug"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "libresample - Win32 Release" (based on "Win32 (x86) Static Library")
+!MESSAGE "libresample - Win32 Debug" (based on "Win32 (x86) Static Library")
+!MESSAGE 
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+RSC=rc.exe
+
+!IF  "$(CFG)" == "libresample - Win32 Release"
+
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+# PROP BASE Intermediate_Dir "Release"
+# PROP BASE Target_Dir ""
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+# PROP Use_Debug_Libraries 0
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+# PROP Intermediate_Dir "Release"
+# PROP Target_Dir ""
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+# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c
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+# ADD RSC /l 0x409 /d "_DEBUG"
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+LIB32=link.exe -lib
+# ADD BASE LIB32 /nologo
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