use-case.h: add USB as allowed device name

Some USB devices are really generic where the
PCM stream can be routed to different paths.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/include/use-case.h b/include/use-case.h
index c2ba79a9fdb16ae4331e6bf652da0d8ef4d1b092..21df1de472d6f6068e3e779c5763904670390018 100644 (file)
--- a/include/use-case.h
+++ b/include/use-case.h
@@ -140,6 +140,7 @@ extern "C" {
 #define SND_USE_CASE_DEV_EARPIECE      "Earpiece"      /**< Earpiece Device */
 #define SND_USE_CASE_DEV_SPDIF         "SPDIF"         /**< SPDIF Device */
 #define SND_USE_CASE_DEV_HDMI          "HDMI"          /**< HDMI Device */
+#define SND_USE_CASE_DEV_USB           "USB"           /**< USB Device (multifunctional) */
 /* add new devices to end of list */