package/tvheadend: Add transcoding support by ffmpeg

Add --disable-libffmpeg_static to disable static linking of ffmpeg
libraries into the tvheadend binary.

tvheadend compiles with ffmpeg using this minimal defconfig:

BR2_TOOLCHAIN_BUILDROOT_LARGEFILE=y
BR2_TOOLCHAIN_BUILDROOT_INET_IPV6=y
BR2_PACKAGE_FFMPEG=y
BR2_PACKAGE_TVHEADEND=y

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/tvheadend/Config.in

@@ -13,6 +13,8 @@ config BR2_PACKAGE_TVHEADEND
 	# architecture is avr32, which uses gcc 4.2.
 	depends on !BR2_avr32
 	select BR2_PACKAGE_DTV_SCAN_TABLES
+	select BR2_PACKAGE_FFMPEG_AVRESAMPLE if BR2_PACKAGE_FFMPEG
+	select BR2_PACKAGE_FFMPEG_SWSCALE if BR2_PACKAGE_FFMPEG
 	select BR2_PACKAGE_LIBICONV if !BR2_ENABLE_LOCALE
 	select BR2_PACKAGE_OPENSSL
 	help

package/tvheadend/tvheadend.mk

@@ -14,6 +14,13 @@ ifeq ($(BR2_PACKAGE_AVAHI),y)
 TVHEADEND_DEPENDENCIES += avahi
 endif
 
+ifeq ($(BR2_PACKAGE_FFMPEG),y)
+TVHEADEND_DEPENDENCIES += ffmpeg
+TVHEADEND_CONF_OPTS += --enable-libav
+else
+TVHEADEND_CONF_OPTS += --disable-libav
+endif
+
 ifeq ($(BR2_PACKAGE_LIBDVBCSA),y)
 TVHEADEND_DEPENDENCIES += libdvbcsa
 TVHEADEND_CONF_OPTS += --enable-dvbcsa
@@ -38,6 +45,7 @@ define TVHEADEND_CONFIGURE_CMDS
 	 --python="$(HOST_DIR)/usr/bin/python"	\
 	 --disable-dvbscan			\
 	 --enable-bundle			\
+	 --disable-libffmpeg_static		\
 	 $(TVHEADEND_CONF_OPTS)			\
 	)
 endef