Converting effect chains to float point by default.

Removed additional conversions from/to int16/float.
Fixed config file restrictions.
Detection of native format (int16/float) of effects.
On-the-fly conversion to/from 16 bit effects if necessary.
WIP: testing effects in all possible configurations.

Bug: 63935479
Test: Bufflog dumps, frequency analysis comparison, SoloTester
Change-Id: Id4cabc5c5698befc90a5d68b0b996a9b9adebfc4
diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index 946d88f..e97bb06 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -68,8 +68,8 @@
             status_t    attachAuxEffect(int EffectId);
             void        setAuxBuffer(int EffectId, int32_t *buffer);
             int32_t     *auxBuffer() const { return mAuxBuffer; }
-            void        setMainBuffer(int16_t *buffer) { mMainBuffer = buffer; }
-            int16_t     *mainBuffer() const { return mMainBuffer; }
+            void        setMainBuffer(effect_buffer_t *buffer) { mMainBuffer = buffer; }
+            effect_buffer_t *mainBuffer() const { return mMainBuffer; }
             int         auxEffectId() const { return mAuxEffectId; }
     virtual status_t    getTimestamp(AudioTimestamp& timestamp);
             void        signal();
@@ -150,7 +150,8 @@
                                     // allocated statically at track creation time,
                                     // and is even allocated (though unused) for fast tracks
                                     // FIXME don't allocate track name for fast tracks
-    int16_t             *mMainBuffer;
+    effect_buffer_t     *mMainBuffer;
+
     int32_t             *mAuxBuffer;
     int                 mAuxEffectId;
     bool                mHasVolumeController;