audio: define type for unique audio Ids.
Define a type for unique audio Ids allocated by AudioFLinger
for use as session Ids or I/O handles.
Bug: 12378680.
Change-Id: Ic9019fff97a1227b60e48c88c57d25dbbdcd7d1e
diff --git a/include/system/audio.h b/include/system/audio.h
index a287389..719a7c4 100644
--- a/include/system/audio.h
+++ b/include/system/audio.h
@@ -173,6 +173,11 @@
AUDIO_SESSION_ALLOCATE = 0,
} audio_session_t;
+/* a unique ID allocated by AudioFlinger for use as a audio_io_handle_t or audio_session_t */
+typedef int audio_unique_id_t;
+
+#define AUDIO_UNIQUE_ID_ALLOCATE AUDIO_SESSION_ALLOCATE
+
/* Audio sub formats (see enum audio_format). */
/* PCM sub formats */