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-rw-r--r--sound/usb/mixer.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index b4a2c8165e4..ae1a14dcfe8 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -24,7 +24,16 @@ struct usb_mixer_interface {
u8 xonar_u1_status;
};
-#define MAX_CHANNELS 10 /* max logical channels */
+#define MAX_CHANNELS 16 /* max logical channels */
+
+enum {
+ USB_MIXER_BOOLEAN,
+ USB_MIXER_INV_BOOLEAN,
+ USB_MIXER_S8,
+ USB_MIXER_U8,
+ USB_MIXER_S16,
+ USB_MIXER_U16,
+};
struct usb_mixer_elem_info {
struct usb_mixer_interface *mixer;
@@ -55,4 +64,7 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
+int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
+ struct snd_kcontrol *kctl);
+
#endif /* __USBMIXER_H */