3 files changed, 8 insertions, 0 deletions

diff --git a/firmware/export/config/android.h b/firmware/export/config/android.h
index ed1a283c7d..69a758d69b 100644
--- a/firmware/export/config/android.h
+++ b/firmware/export/config/android.h
@@ -79,6 +79,9 @@
 /* define this if the target has volume keys which can be used in the lists */
 #define HAVE_VOLUME_IN_LIST
 
+/* define this if the host platform can change volume outside of rockbox */
+#define PLATFORM_HAS_VOLUME_CHANGE
+
 #define HAVE_SW_TONE_CONTROLS 
 
 /* Define current usage levels. */
diff --git a/firmware/export/kernel.h b/firmware/export/kernel.h
index 6aaf11ddb9..66efce33f6 100644
--- a/firmware/export/kernel.h
+++ b/firmware/export/kernel.h
@@ -83,6 +83,7 @@
 #define SYS_IAP_HANDLEPKT         MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 2)
 #define SYS_CALL_INCOMING         MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 3)
 #define SYS_CALL_HUNG_UP          MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 4)
+#define SYS_VOLUME_CHANGED        MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 5)
 
 #define IS_SYSEVENT(ev)           ((ev & SYS_EVENT) == SYS_EVENT)
 
diff --git a/firmware/export/system.h b/firmware/export/system.h
index 78bddae387..3f626c3688 100644
--- a/firmware/export/system.h
+++ b/firmware/export/system.h
@@ -137,6 +137,10 @@ int get_cpu_boost_counter(void);
 #undef htobe32
 #endif
 
+#if (CONFIG_PLATFORM & PLATFORM_HOSTED) && defined(PLATFORM_HAS_VOLUME_CHANGE)
+int hosted_get_volume(void);
+#endif
+
 /* Get the byte offset of a type's member */
 #define OFFSETOF(type, membername) ((off_t)&((type *)0)->membername)