Audio policy: fix device gain initialization

Fix initilization of default gain configuration for
audio devices loaded from audio_policy.conf.

Initialization cannot be done in constructor as the possible
gain configurations are not loaded yet.

Bug: 19120566.
Change-Id: I78f057ecfa1a121365ac3d8f317912a6f1647627

2 files changed, 15 insertions, 5 deletions

diff --git a/services/audiopolicy/AudioPolicyManager.cpp b/services/audiopolicy/AudioPolicyManager.cpp
index 0349327..fb74d66 100644
--- a/services/audiopolicy/AudioPolicyManager.cpp
+++ b/services/audiopolicy/AudioPolicyManager.cpp
@@ -7449,9 +7449,6 @@ AudioPolicyManager::DeviceDescriptor::DeviceDescriptor(const String8& name, audi
                              NULL),
                      mDeviceType(type), mAddress(""), mId(0)
 {
-    if (mGains.size() > 0) {
-        mGains[0]->getDefaultConfig(&mGain);
-    }
 }
 
 bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& other) const
@@ -7466,6 +7463,15 @@ bool AudioPolicyManager::DeviceDescriptor::equals(const sp<DeviceDescriptor>& ot
                 mChannelMask == other->mChannelMask);
 }
 
+void AudioPolicyManager::DeviceDescriptor::loadGains(cnode *root)
+{
+    AudioPort::loadGains(root);
+    if (mGains.size() > 0) {
+        mGains[0]->getDefaultConfig(&mGain);
+    }
+}
+
+
 void AudioPolicyManager::DeviceVector::refreshTypes()
 {
     mDeviceTypes = AUDIO_DEVICE_NONE;
diff --git a/services/audiopolicy/AudioPolicyManager.h b/services/audiopolicy/AudioPolicyManager.h
index 0fa182b..2bc91e1 100644
--- a/services/audiopolicy/AudioPolicyManager.h
+++ b/services/audiopolicy/AudioPolicyManager.h
@@ -264,7 +264,7 @@ protected:
 
             audio_gain_mode_t loadGainMode(char *name);
             void loadGain(cnode *root, int index);
-            void loadGains(cnode *root);
+            virtual void loadGains(cnode *root);
 
             // searches for an exact match
             status_t checkExactSamplingRate(uint32_t samplingRate) const;
@@ -344,10 +344,14 @@ protected:
             virtual ~DeviceDescriptor() {}
 
             bool equals(const sp<DeviceDescriptor>& other) const;
+
+            // AudioPortConfig
+            virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; }
             virtual void toAudioPortConfig(struct audio_port_config *dstConfig,
                                    const struct audio_port_config *srcConfig = NULL) const;
-            virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; }
 
+            // AudioPort
+            virtual void loadGains(cnode *root);
             virtual void toAudioPort(struct audio_port *port) const;
 
             status_t dump(int fd, int spaces, int index) const;