ModioFX: split backend implementations

Change-Id: Ib6f345000b25a17a5c7520ea47355f1d96936522
Signed-off-by: Roman Birg <roman@cyngn.com>

6 files changed, 29 insertions, 85 deletions

diff --git a/src/com/cyngn/audiofx/Constants.java b/src/com/cyngn/audiofx/Constants.java
index b38b0cd..c1d5475 100644
--- a/src/com/cyngn/audiofx/Constants.java
+++ b/src/com/cyngn/audiofx/Constants.java
@@ -24,8 +24,14 @@ import java.util.List;
 
 public class Constants {
 
+    // current pref version, bump to rebuild prefs
     public static final int CURRENT_PREFS_INT_VERSION = 2;
 
+    // effect type identifiers
+    public static final int EFFECT_TYPE_ANDROID = 1;
+    public static final int EFFECT_TYPE_MAXXAUDIO = 2;
+    public static final int EFFECT_TYPE_DTS = 3;
+
     // global settings
     public static final String AUDIOFX_GLOBAL_FILE = "global";
 
diff --git a/src/com/cyngn/audiofx/backends/AndroidEffects.java b/src/com/cyngn/audiofx/backends/AndroidEffects.java
index 77af1c9..090eb73 100644
--- a/src/com/cyngn/audiofx/backends/AndroidEffects.java
+++ b/src/com/cyngn/audiofx/backends/AndroidEffects.java
@@ -8,7 +8,6 @@ import android.media.audiofx.Virtualizer;
 import android.util.Log;
 
 import com.cyngn.audiofx.Constants;
-import com.cyngn.audiofx.activity.MasterConfigControl;
 
 /**
  * EffectSet which comprises standard Android effects
@@ -170,7 +169,7 @@ class AndroidEffects extends EffectSetWithAndroidEq {
 
     @Override
     public int getBrand() {
-        return EffectsFactory.ANDROID;
+        return Constants.EFFECT_TYPE_ANDROID;
     }
 
     private void setParameterSafe(AudioEffect e, int p, short v) {
diff --git a/src/com/cyngn/audiofx/backends/EffectsFactory.java b/src/com/cyngn/audiofx/backends/EffectsFactory.java
deleted file mode 100644
index 6057255..0000000
--- a/src/com/cyngn/audiofx/backends/EffectsFactory.java
+++ /dev/null
@@ -1,78 +0,0 @@
-package com.cyngn.audiofx.backends;
-
-import android.content.Context;
-import android.media.AudioDeviceInfo;
-import android.util.Log;
-
-import java.io.File;
-
-/**
- * Creates an EffectSet appropriate for the current device
- *
- * Currently handles basic Android effects and MaxxAudio. Extend for DTS in the future.
- */
-public class EffectsFactory {
-
-    private static final String TAG = "AudioFx-EffectsFactory";
-
-    private static int sBrand = -1; // cached value to not hit io every time we need a new effect
-
-    public static final int ANDROID = 1;
-    public static final int MAXXAUDIO = 2;
-    public static final int DTS = 3;
-
-    public static EffectSet createEffectSet(Context context, int sessionId,
-            AudioDeviceInfo currentDevice) {
-        EffectSet effects = null;
-        int brand = getBrand();
-
-        // dts?
-        if (brand == DTS) {
-            try {
-                effects = new DtsEffects(context, sessionId, currentDevice);
-            } catch (Exception e) {
-                Log.e(TAG, "Unable to create DTS effects!", e);
-                effects = null;
-            }
-            return effects;
-        } else if (brand == MAXXAUDIO) {
-            // try MaxxAudio next, this will throw an exception if unavailable
-            try {
-                effects = new MaxxAudioEffects(sessionId, currentDevice);
-            } catch (Exception e) {
-                Log.e(TAG, "Unable to create MaxxAudio effects!", e);
-                effects = null;
-            }
-            return effects;
-        }
-
-        // if this throws, we're screwed, don't bother to recover. these
-        // are the standard effects that every android device must have,
-        // and if they don't exist we have bigger problems.
-        return new AndroidEffects(sessionId, currentDevice);
-    }
-
-    public static int getBrand() {
-        if (sBrand == -1) {
-            sBrand = getBrandInternal();
-        }
-        return sBrand;
-    }
-
-    private static int getBrandInternal() {
-        if (hasDts()) {
-            return DTS;
-        } else if (hasMaxxAudio()) {
-            return MAXXAUDIO;
-        }
-        return ANDROID;
-    }
-
-    private static boolean hasDts() {
-        return new File("***REMOVED***").exists();
-    }
-
-    private static boolean hasMaxxAudio() {
-        return new File("***REMOVED***").exists();
-    }
-}
diff --git a/src/com/cyngn/audiofx/backends/IEffectFactory.java b/src/com/cyngn/audiofx/backends/IEffectFactory.java
new file mode 100644
index 0000000..8e629b8
--- /dev/null
+++ b/src/com/cyngn/audiofx/backends/IEffectFactory.java
@@ -0,0 +1,16 @@
+package com.cyngn.audiofx.backends;
+
+import android.content.Context;
+import android.media.AudioDeviceInfo;
+
+interface IEffectFactory {
+
+    /**
+     * Create a new EffectSet based on current stream parameters.
+     * @param context context to create the effect with
+     * @param sessionId session id to attach the effect to
+     * @param currentDevice current device that the effect should initially setup for
+     * @return an {@link EffectSet}
+     */
+    EffectSet createEffectSet(Context context, int sessionId, AudioDeviceInfo currentDevice);
+}
diff --git a/src/com/cyngn/audiofx/service/DevicePreferenceManager.java b/src/com/cyngn/audiofx/service/DevicePreferenceManager.java
index 11d4de5..928209e 100644
--- a/src/com/cyngn/audiofx/service/DevicePreferenceManager.java
+++ b/src/com/cyngn/audiofx/service/DevicePreferenceManager.java
@@ -118,7 +118,7 @@ class DevicePreferenceManager implements AudioOutputChangeListener.AudioOutputCh
             }
             return;
         }
-        EffectSet temp = EffectsFactory.createEffectSet(mContext, 0, null);
+        EffectSet temp = new EffectsFactory().createEffectSet(mContext, 0, null);
 
         final int numBands = temp.getNumEqualizerBands();
         final int numPresets = temp.getNumEqualizerPresets();
@@ -168,8 +168,8 @@ class DevicePreferenceManager implements AudioOutputChangeListener.AudioOutputCh
 
         editor.putBoolean(AUDIOFX_GLOBAL_HAS_VIRTUALIZER, temp.hasVirtualizer());
         editor.putBoolean(AUDIOFX_GLOBAL_HAS_BASSBOOST, temp.hasBassBoost());
-        editor.putBoolean(AUDIOFX_GLOBAL_HAS_MAXXAUDIO, temp.getBrand() == EffectsFactory.MAXXAUDIO);
-        editor.putBoolean(AUDIOFX_GLOBAL_HAS_DTS, temp.getBrand() == EffectsFactory.DTS);
+        editor.putBoolean(AUDIOFX_GLOBAL_HAS_MAXXAUDIO, temp.getBrand() == Constants.EFFECT_TYPE_MAXXAUDIO);
+        editor.putBoolean(AUDIOFX_GLOBAL_HAS_DTS, temp.getBrand() == Constants.EFFECT_TYPE_DTS);
         editor.commit();
         temp.release();
 
@@ -208,7 +208,7 @@ class DevicePreferenceManager implements AudioOutputChangeListener.AudioOutputCh
 
         final SharedPreferences globalPrefs = Constants.getGlobalPrefs(mContext);
 
-        // Nothing to see here for DTS
+        // Nothing to see here for EFFECT_TYPE_DTS
         if (globalPrefs.getBoolean(AUDIOFX_GLOBAL_HAS_DTS, false)) {
             return;
         }
diff --git a/src/com/cyngn/audiofx/service/SessionManager.java b/src/com/cyngn/audiofx/service/SessionManager.java
index 2a60cc2..c744686 100644
--- a/src/com/cyngn/audiofx/service/SessionManager.java
+++ b/src/com/cyngn/audiofx/service/SessionManager.java
@@ -309,7 +309,8 @@ class SessionManager implements AudioOutputChangeListener.AudioOutputChangedCall
                         session = mAudioSessionsL.get(sessionId);
                         if (session == null) {
                             try {
-                                session = EffectsFactory.createEffectSet(mContext, sessionId, mCurrentDevice);
+                                session = new EffectsFactory()
+                                        .createEffectSet(mContext, sessionId, mCurrentDevice);
                             } catch (Exception e) {
                                 Log.e(TAG, "couldn't create effects for session id: " + sessionId, e);
                                 break;