Fix Windows warning during Windows compilation

Make sure OpenAL context is setup before opening capture device

utils/iaxclient/lib/CMakeLists.txt

@@ -1,4 +1,4 @@
-
+# CMakeLists.txt, for utils/iaxclient/lib - 20130925
 # even if we don't select the codec, speex is used for pre-processing audio
 set(ENABLE_SPEXX 1)
 
@@ -112,6 +112,18 @@ add_definitions(-DLIBIAX)
 add_definitions(-DHAS_STRING_H -DHAS_STDLIB_H)
 add_definitions(-DCODEC_GSM)
 
+if (MSVC)
+    # turn off various warnings
+    set(WFLAGS)
+    foreach(warning 4244 4305 4996)
+        set(WFLAGS "${WFLAGS} /wd${warning}")
+    endforeach()
+    add_definitions(${WFLAGS})
+endif ()
+
+add_definitions( -DHAVE_CONFIG_H ) # to use fgfs config.h to get FG version, if needed
+add_definitions( -DLIBVER="SVN 261" ) # add an iaxclient_lib version string
+
 include_directories(${PROJECT_SOURCE_DIR}/utils/iaxclient/lib)
 include_directories(${PROJECT_SOURCE_DIR}/utils/iaxclient/lib/libiax2/src)
 include_directories(${PROJECT_SOURCE_DIR}/utils/iaxclient/lib/gsm/inc)
@@ -122,3 +134,4 @@ add_library(iaxclient_lib STATIC
     ${SPEEX_SOURCES}
     ${LIBIAX2_SOURCES})
 
+# eof

utils/iaxclient/lib/audio_openal.c

@@ -263,14 +263,7 @@ int openal_initialize(struct iaxc_audio_driver *d, int sample_rate)
     int err = alGetError();
     d->priv = priv;
 
-    // First we are looking for input device
+    // First we are looking for output device
-    priv->in_dev = alcCaptureOpenDevice(NULL, 8000, AL_FORMAT_MONO16, 800);
-    if (!priv->in_dev) return openal_error("alcCaptureOpenDevice", alGetError());
-
-    alcCaptureStart(priv->in_dev);
-    if ((err = alGetError())) return openal_error("alcCaptureStart", err);
-
-    // Then we look for output device
     priv->out_ctx = alcGetCurrentContext();
 
     if( priv->out_ctx == NULL ) { // FGCom standalone only
@@ -284,6 +277,14 @@ int openal_initialize(struct iaxc_audio_driver *d, int sample_rate)
     alcMakeContextCurrent(priv->out_ctx);
     if ((err = alGetError())) return openal_error("alcMakeContextCurrent", err);
 
+    // Then we look for input device
+    priv->in_dev = alcCaptureOpenDevice(NULL, 8000, AL_FORMAT_MONO16, 800);
+    if (!priv->in_dev) return openal_error("alcCaptureOpenDevice", alGetError());
+    if ((err = alGetError())) return openal_error("alcCaptureOpenDevice1", alGetError());
+
+    alcCaptureStart(priv->in_dev);
+    if ((err = alGetError())) return openal_error("alcCaptureStart", err);
+
     priv->sample_rate = sample_rate;    
     priv->num_buffers = 20;
     priv->input_level = 0;

utils/iaxclient/lib/libiax2/src/iax.c

@@ -923,8 +923,12 @@ void iax_set_jb_target_extra( long value )
 int iax_init(int preferredportno)
 {
 	int portno = preferredportno;
-
+#ifndef _MSC_VER // avoid compare of address of imported function
+     /* MSVC only - In certain circumstances the addresses placed in iax_sendto and iax_recvfrom 
+        can be an offset to a jump table, making a compare of the current address to the address 
+        of the actual imported function fail. */
 	if (iax_recvfrom == (iax_recvfrom_t)recvfrom)
+#endif // !_MSC_VER
 	{
 		struct sockaddr_in sin;
 		socklen_t sinlen;