gnuradio: add gr-audio support

gr-audio is a gnuradio module to use audio card as sink or source.

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Signed-off-by: Julien BOIBESSOT <julien.boibessot@armadeus.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gnuradio/Config.in

@@ -30,6 +30,12 @@ config BR2_PACKAGE_GNURADIO
 
 if BR2_PACKAGE_GNURADIO
 
+config BR2_PACKAGE_GNURADIO_AUDIO
+	bool "gr-audio"
+	depends on BR2_PACKAGE_ALSA_LIB || BR2_PACKAGE_PORTAUDIO
+	help
+	  Add audio source/sink to GNU Radio
+
 config BR2_PACKAGE_GNURADIO_BLOCKS
 	bool "blocks support"
 	help

package/gnuradio/gnuradio.mk

@@ -52,6 +52,18 @@ else
 GNURADIO_CONF_OPTS += -DENABLE_GR_ANALOG=OFF
 endif
 
+ifeq ($(BR2_PACKAGE_GNURADIO_AUDIO),y)
+ifeq ($(BR2_PACKAGE_ALSA_LIB),y)
+GNURADIO_DEPENDENCIES += alsa-lib
+endif
+ifeq ($(BR2_PACKAGE_PORTAUDIO),y)
+GNURADIO_DEPENDENCIES += portaudio
+endif
+GNURADIO_CONF_OPTS += -DENABLE_GR_AUDIO=ON
+else
+GNURADIO_CONF_OPTS += -DENABLE_GR_AUDIO=OFF
+endif
+
 ifeq ($(BR2_PACKAGE_GNURADIO_BLOCKS),y)
 GNURADIO_CONF_OPTS += -DENABLE_GR_BLOCKS=ON
 else