GUACAMOLE-25: Set AudioCapture flag if audio input is enabled.

configure.ac

@@ -436,6 +436,7 @@ then
     have_freerdp=yes
     legacy_freerdp_extensions=no
     rdpsettings_interface=unknown
+    rdpsettings_audiocapture=yes
     rdpsettings_audioplayback=yes
     rdpsettings_deviceredirection=yes
     freerdp_interface=unknown
@@ -686,6 +687,11 @@ then
                          [rdpsettings_audioplayback=no],
                          [[#include <freerdp/freerdp.h>]])
 
+        # Legacy interface may not have AudioCapture settings
+        AC_CHECK_MEMBERS([rdpSettings.audio_capture],,
+                         [rdpsettings_audiocapture=no],
+                         [[#include <freerdp/freerdp.h>]])
+
         # Legacy interface may not have DeviceRedirection settings
         AC_CHECK_MEMBERS([rdpSettings.device_redirection],,
                          [rdpsettings_deviceredirection=no],
@@ -707,6 +713,12 @@ if test "x${have_freerdp}" = "xyes" -a "x${rdpsettings_audioplayback}" = "xyes";
               [Whether the rdpSettings structure has AudioPlayback settings])
 fi
 
+# Activate audio capture settings if present
+if test "x${have_freerdp}" = "xyes" -a "x${rdpsettings_audiocapture}" = "xyes"; then
+    AC_DEFINE([HAVE_RDPSETTINGS_AUDIOCAPTURE],,
+              [Whether the rdpSettings structure has AudioCapture settings])
+fi
+
 # Activate device redirection settings if present
 if test "x${have_freerdp}" = "xyes" -a "x${rdpsettings_deviceredirection}" = "xyes"; then
     AC_DEFINE([HAVE_RDPSETTINGS_DEVICEREDIRECTION],,

src/protocols/rdp/rdp_settings.c

@@ -993,6 +993,17 @@ void guac_rdp_push_settings(guac_rdp_settings* guac_settings, freerdp* rdp) {
 #ifdef HAVE_RDPSETTINGS_AUDIOPLAYBACK
     rdp_settings->AudioPlayback = guac_settings->audio_enabled;
 #endif
+#endif
+
+    /* Audio capture */
+#ifdef LEGACY_RDPSETTINGS
+#ifdef HAVE_RDPSETTINGS_AUDIOCAPTURE
+    rdp_settings->audio_capture = guac_settings->enable_audio_input;
+#endif
+#else
+#ifdef HAVE_RDPSETTINGS_AUDIOCAPTURE
+    rdp_settings->AudioCapture = guac_settings->enable_audio_input;
+#endif
 #endif
 
     /* Device redirection */