make libaudioflinger symbols visibility hidden

we export only symbols needed by clients of this library.
this saves about 130KB (1/3rd of the lib size)

Change-Id: Id81f3ecb299ee3abc0811915cf6efe87180bf15c

4 files changed, 11 insertions, 5 deletions

diff --git a/services/audioflinger/Android.mk b/services/audioflinger/Android.mk
index 061a079..714854e 100644
--- a/services/audioflinger/Android.mk
+++ b/services/audioflinger/Android.mk
@@ -81,6 +81,8 @@ else
     LOCAL_CFLAGS += -DANDROID_SMP=0
 endif
 
+LOCAL_CFLAGS += -fvisibility=hidden
+
 include $(BUILD_SHARED_LIBRARY)
 
 #
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index b0efef6..cf68848 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -24,6 +24,8 @@
 
 #include <common_time/cc_helper.h>
 
+#include <cutils/compiler.h>
+
 #include <media/IAudioFlinger.h>
 #include <media/IAudioFlingerClient.h>
 #include <media/IAudioTrack.h>
@@ -89,7 +91,7 @@ class AudioFlinger :
 {
     friend class BinderService<AudioFlinger>;   // for AudioFlinger()
 public:
-    static const char* getServiceName() { return "media.audio_flinger"; }
+    static const char* getServiceName() ANDROID_API { return "media.audio_flinger"; }
 
     virtual     status_t    dump(int fd, const Vector<String16>& args);
 
@@ -278,7 +280,7 @@ private:
 
                 bool        btNrecIsOff() const { return mBtNrecIsOff; }
 
-                            AudioFlinger();
+                            AudioFlinger() ANDROID_API;
     virtual                 ~AudioFlinger();
 
     // call in any IAudioFlinger method that accesses mPrimaryHardwareDev
diff --git a/services/audioflinger/AudioPolicyService.h b/services/audioflinger/AudioPolicyService.h
index 35cf368..53238fa 100644
--- a/services/audioflinger/AudioPolicyService.h
+++ b/services/audioflinger/AudioPolicyService.h
@@ -19,6 +19,7 @@
 
 #include <cutils/misc.h>
 #include <cutils/config_utils.h>
+#include <cutils/compiler.h>
 #include <utils/String8.h>
 #include <utils/Vector.h>
 #include <utils/SortedVector.h>
@@ -44,7 +45,7 @@ class AudioPolicyService :
 
 public:
     // for BinderService
-    static const char *getServiceName() { return "media.audio_policy"; }
+    static const char *getServiceName() ANDROID_API { return "media.audio_policy"; }
 
     virtual status_t    dump(int fd, const Vector<String16>& args);
 
@@ -137,7 +138,7 @@ public:
     virtual status_t setVoiceVolume(float volume, int delayMs = 0);
 
 private:
-                        AudioPolicyService();
+                        AudioPolicyService() ANDROID_API;
     virtual             ~AudioPolicyService();
 
             status_t dumpInternals(int fd);
diff --git a/services/audioflinger/AudioResampler.h b/services/audioflinger/AudioResampler.h
index 2b8694f..29dc5b6 100644
--- a/services/audioflinger/AudioResampler.h
+++ b/services/audioflinger/AudioResampler.h
@@ -19,13 +19,14 @@
 
 #include <stdint.h>
 #include <sys/types.h>
+#include <cutils/compiler.h>
 
 #include <media/AudioBufferProvider.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
 
-class AudioResampler {
+class ANDROID_API AudioResampler {
 public:
     // Determines quality of SRC.
     //  LOW_QUALITY: linear interpolator (1st order)