package/libpjsip: add ffmpeg support

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libpjsip/libpjsip.mk

@@ -33,7 +33,6 @@ LIBPJSIP_CONF_OPTS = \
 	--disable-g711-codec \
 	--disable-l16-codec \
 	--disable-g722-codec \
-	--disable-ffmpeg \
 	--disable-ipp \
 	--disable-silk \
 	--with-external-srtp
@@ -57,6 +56,13 @@ else
 LIBPJSIP_CONF_OPTS += --disable-bcg729
 endif
 
+ifeq ($(BR2_PACKAGE_FFMPEG),y)
+LIBPJSIP_DEPENDENCIES += ffmpeg
+LIBPJSIP_CONF_OPTS += --with-ffmpeg=$(STAGING_DIR)/usr
+else
+LIBPJSIP_CONF_OPTS += --disable-ffmpeg
+endif
+
 ifeq ($(BR2_PACKAGE_LIBGSM),y)
 LIBPJSIP_CONF_OPTS += \
 	--enable-gsm-codec \