add --enable-fastscan configure option

The #define in src/gui/scan_setup.h did not work (undefining
ENABLE_FASTSCAN caused really strange side effects wrt background
scanning in standby mode), and all the unused code was still built.
With this configure option, people who really want this obscure feature
can enable it for their builds.

configure.ac

@@ -165,6 +165,12 @@ AC_ARG_ENABLE(viasatepg,
 	[  --enable-viasatepg                  enable ViaSat EPG code (experimental)],
 	[AC_DEFINE(ENABLE_VIASATEPG,1,[enable ViaSat EPG code])])
 
+AC_ARG_ENABLE(fastscan,
+	[  --enable-fastscan                   enable Fastscan code)],
+	[AC_DEFINE(ENABLE_FASTSCAN,1,[enable fastscan code])])
+
+AM_CONDITIONAL(ENABLE_FASTSCAN, test "$enable_fastscan" = "yes")
+
 AC_ARG_ENABLE(giflib,
 	AS_HELP_STRING(--enable-giflib,use giflib instead of libungif),
 	,[enable_giflib=no])

src/gui/scan.cpp

@@ -2,7 +2,7 @@
 	Neutrino-GUI  -   DBoxII-Project
 
 	Copyright (C) 2001 Steffen Hehn 'McClean'
-	Copyright (C) 2011-2012 Stefan Seyfried
+	Copyright (C) 2011-2013,2015,2017 Stefan Seyfried
 
 	License: GPL
 
@@ -169,6 +169,13 @@ int CScanTs::exec(CMenuTarget* /*parent*/, const std::string & actionKey)
 	bool test = actionKey == "test";
 	bool manual = (actionKey == "manual") || test;
 	bool fast = (actionKey == "fast");
+#if !ENABLE_FASTSCAN
+	if (fast) {
+		/* popup message? But this *should* be impossible to happen anyway */
+		fprintf(stderr, "CScanTs::exec: fastscan disabled at build-time!\n");
+		return menu_return::RETURN_REPAINT;
+	}
+#endif
 
 	if (CFrontend::isSat(delsys))
 		pname = scansettings.satName;
@@ -299,8 +306,10 @@ int CScanTs::exec(CMenuTarget* /*parent*/, const std::string & actionKey)
 	} else if(manual)
 		success = g_Zapit->scan_TP(TP);
 	else if(fast) {
+#if ENABLE_FASTSCAN
 		CServiceScan::getInstance()->QuietFastScan(false);
 		success = CZapit::getInstance()->StartFastScan(scansettings.fast_type, scansettings.fast_op);
+#endif
 	}
 	else
 		success = g_Zapit->startScan(scan_flags);

src/gui/scan_setup.h

@@ -42,8 +42,6 @@
 
 #define scansettings CNeutrinoApp::getInstance()->getScanSettings()
 
-//#define ENABLE_FASTSCAN //don't define this to remove fast scan menu
-
 class CScanSetup : public CMenuTarget, public CChangeObserver
 {
 	protected:

src/neutrino.cpp

@@ -4,7 +4,7 @@
 	Copyright (C) 2001 Steffen Hehn 'McClean'
 							 and some other guys
 
-	Copyright (C) 2006-2016 Stefan Seyfried
+	Copyright (C) 2006-2017 Stefan Seyfried
 
 	Copyright (C) 2011 CoolStream International Ltd
 
@@ -4852,6 +4852,7 @@ void CNeutrinoApp::Cleanup()
 #endif
 }
 
+#if ENABLE_FASTSCAN
 void CNeutrinoApp::CheckFastScan(bool standby, bool reload)
 {
 	if (scansettings.fst_update) {
@@ -4883,6 +4884,11 @@ void CNeutrinoApp::CheckFastScan(bool standby, bool reload)
 		}
 	}
 }
+#else
+void CNeutrinoApp::CheckFastScan(bool, bool)
+{
+}
+#endif
 
 bool CNeutrinoApp::adjustToChannelID(const t_channel_id channel_id)
 {

src/zapit/include/zapit/scan.h

@@ -109,6 +109,7 @@ class CServiceScan : public OpenThreads::Thread
 		uint32_t tune_tp_index;
 
 		unsigned char fst_version;
+#if ENABLE_FASTSCAN
 		bool quiet_fastscan;
 		void InitFastscanLnb(int id);
 		bool FastscanTune(int id);
@@ -120,7 +121,7 @@ class CServiceScan : public OpenThreads::Thread
 		void process_satellite_delivery_system_descriptor(const unsigned char * const buffer, FrontendParameters * feparams, t_satellite_position * satellitePosition);
 		bool ScanFast();
 		void ReportFastScan(FrontendParameters &feparams, t_satellite_position satellitePosition);
-
+#endif
 		void run();
 
 		CFrontend * frontend;
@@ -151,12 +152,14 @@ class CServiceScan : public OpenThreads::Thread
 		bool isFtaOnly() { return flags & SCAN_FTA; }
 		int GetFlags() { return flags; }
 		bool SatHaveChannels() { return satHaveChannels; }
+#if ENABLE_FASTSCAN
 		/* fast-scan */
 		bool TestDiseqcConfig(int num);
 		bool ReadFstVersion(int num);
 		unsigned char GetFstVersion() { return fst_version; }
 		void QuietFastScan(bool enable) { quiet_fastscan = enable; }
 		bool ScanFast(int num, bool reload = true);
+#endif
 };
 
 #endif /* __scan_h__ */

src/zapit/src/Makefile.am

@@ -20,7 +20,6 @@ libzapit_a_SOURCES = \
 	bouquets.cpp \
 	capmt.cpp \
 	channel.cpp \
-	fastscan.cpp \
 	femanager.cpp \
 	frontend.cpp \
 	getservices.cpp \
@@ -33,6 +32,11 @@ libzapit_a_SOURCES = \
 	transponder.cpp \
 	zapit.cpp
 
+if ENABLE_FASTSCAN
+libzapit_a_SOURCES += \
+	fastscan.cpp
+endif
+
 bin_PROGRAMS = pzapit
 sbin_PROGRAMS = udpstreampes