From a768c306b2391b8b573f047de3416c693fa50e62 Mon Sep 17 00:00:00 2001
From: Eric Laurent <elaurent@google.com>
Date: Mon, 28 Jul 2014 11:33:43 -0700
Subject: [PATCH] audio: add audio device address helper function

Add helper function to derive set_parameter command
string from device type and address.

14815883

Change-Id: Icf47218f1809f567ef93bdd99d6308475886b298
---
 include/system/audio.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/system/audio.h b/include/system/audio.h
index 13c8ae5be..a2873890f 100644
--- a/include/system/audio.h
+++ b/include/system/audio.h
@@ -20,6 +20,7 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 
@@ -1325,6 +1326,23 @@ static inline size_t audio_bytes_per_sample(audio_format_t format)
     return size;
 }
 
+/* converts device address to string sent to audio HAL via set_parameters */
+static char *audio_device_address_to_parameter(audio_devices_t device, const char *address)
+{
+    const size_t kSize = AUDIO_DEVICE_MAX_ADDRESS_LEN + sizeof("a2dp_sink_address=");
+    char param[kSize];
+
+    if (device & AUDIO_DEVICE_OUT_ALL_A2DP)
+        snprintf(param, kSize, "%s=%s", "a2dp_sink_address", address);
+    else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
+        snprintf(param, kSize, "%s=%s", "mix", address);
+    else
+        snprintf(param, kSize, "%s", address);
+
+    return strdup(param);
+}
+
+
 __END_DECLS
 
 #endif  // ANDROID_AUDIO_CORE_H