Add DAC's oversampling filter roll-off selection to sound settings.

Change-Id: I1258ba50dd9308f49d97965562f3a423c9bfb785

apps/lang/english.lang

@@ -13114,3 +13114,45 @@
     *: "Select directories to scan"
   </voice>
 </phrase>
+<phrase>
+  id: LANG_FILTER_ROLL_OFF
+  desc: in sound settings
+  user: core
+  <source>
+    *: "DAC's filter roll-off"
+  </source>
+  <dest>
+    *: "DAC's filter roll-off"
+  </dest>
+  <voice>
+    *: "DAC's filter roll-off"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_FILTER_SHARP
+  desc: in sound settings
+  user: core
+  <source>
+    *: "Sharp"
+  </source>
+  <dest>
+    *: "Sharp"
+  </dest>
+  <voice>
+    *: "Sharp"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_FILTER_SLOW
+  desc: in sound settings
+  user: core
+  <source>
+    *: "Slow"
+  </source>
+  <dest>
+    *: "Slow"
+  </dest>
+  <voice>
+    *: "Slow"
+  </voice>
+</phrase>

apps/menus/sound_menu.c

@@ -88,6 +88,10 @@ MENUITEM_SETTING(stereo_width, &global_settings.stereo_width,
 MENUITEM_SETTING(depth_3d, &global_settings.depth_3d, NULL);
 #endif
 
+#ifdef AUDIOHW_HAVE_FILTER_ROLL_OFF
+MENUITEM_SETTING(roll_off, &global_settings.roll_off, NULL);
+#endif
+
 #if CONFIG_CODEC == SWCODEC
     /* Crossfeed Submenu */
     MENUITEM_SETTING(crossfeed, &global_settings.crossfeed, lowlatency_callback);
@@ -183,6 +187,9 @@ MAKE_MENU(sound_settings, ID2P(LANG_SOUND_SETTINGS), NULL, Icon_Audio,
 #ifdef AUDIOHW_HAVE_DEPTH_3D
           ,&depth_3d
 #endif
+#ifdef AUDIOHW_HAVE_FILTER_ROLL_OFF
+          ,&roll_off
+#endif
 #if CONFIG_CODEC == SWCODEC
           ,&crossfeed_menu, &equalizer_menu, &dithering_enabled
 #ifdef HAVE_PITCHCONTROL

apps/settings.c

@@ -753,6 +753,9 @@ void sound_settings_apply(void)
 #ifdef AUDIOHW_HAVE_DEPTH_3D
     sound_set(SOUND_DEPTH_3D, global_settings.depth_3d);
 #endif
+#ifdef AUDIOHW_HAVE_FILTER_ROLL_OFF
+    sound_set(SOUND_FILTER_ROLL_OFF, global_settings.roll_off);
+#endif
 #ifdef AUDIOHW_HAVE_EQ
     int b;
 

apps/settings.h

@@ -790,6 +790,10 @@ struct user_settings
     int depth_3d;
 #endif
 
+#ifdef AUDIOHW_HAVE_FILTER_ROLL_OFF
+    int roll_off;
+#endif
+
 #ifdef AUDIOHW_HAVE_EQ
     /** Hardware EQ tone controls **/
     struct hw_eq_band

apps/settings_list.c

@@ -778,6 +778,13 @@ const struct settings_list settings[] = {
     SOUND_SETTING(0,depth_3d, LANG_DEPTH_3D, "3-d enhancement",
                   SOUND_DEPTH_3D),
 #endif
+
+#ifdef AUDIOHW_HAVE_FILTER_ROLL_OFF
+    CHOICE_SETTING(F_SOUNDSETTING, roll_off, LANG_FILTER_ROLL_OFF, 0,
+                   "roll_off", "sharp,slow", sound_set_filter_roll_off,
+                   2, ID2P(LANG_FILTER_SHARP), ID2P(LANG_FILTER_SLOW)),
+#endif
+
     /* playback */
     OFFON_SETTING(0, playlist_shuffle, LANG_SHUFFLE, false, "shuffle", NULL),
     SYSTEM_SETTING(NVRAM(4), resume_index, -1),

firmware/export/audiohw.h

@@ -40,6 +40,7 @@
 #define MONO_VOL_CAP          (1 << 10)
 #define LIN_GAIN_CAP          (1 << 11)
 #define MIC_GAIN_CAP          (1 << 12)
+#define FILTER_ROLL_OFF_CAP   (1 << 13)
 
 /* Used by every driver to export its min/max/default values for its audio
    settings. */
@@ -269,6 +270,11 @@ enum AUDIOHW_EQ_SETTINGS
 #define AUDIOHW_HAVE_MIC_GAIN
 #endif
 #endif /* HAVE_RECORDING */
+
+#if (AUDIOHW_CAPS & FILTER_ROLL_OFF_CAP)
+#define AUDIOHW_HAVE_FILTER_ROLL_OFF
+#endif
+
 #endif /* AUDIOHW_CAPS */
 
 #ifdef HAVE_SW_TONE_CONTROLS
@@ -454,6 +460,16 @@ void audiohw_set_eq_band_width(unsigned int band, int val);
 void audiohw_set_depth_3d(int val);
 #endif
 
+#ifdef AUDIOHW_HAVE_FILTER_ROLL_OFF
+/**
+ * Set DAC's oversampling filter roll-off.
+ * @param val 0 - sharp roll-off, 1 - slow roll-off.
+ * NOTE: AUDIOHW_CAPS need to contain
+ *          FILTER_ROLL_OFF_CAP
+ */
+void audiohw_set_filter_roll_off(int val);
+#endif
+
 
 void audiohw_set_frequency(int fsel);
 

firmware/export/audiohw_settings.h

@@ -110,6 +110,9 @@ AUDIOHW_SETTINGS(
 #if defined(AUDIOHW_HAVE_DEPTH_3D)
     AUDIOHW_SETTING_ENT(DEPTH_3D,           sound_set_depth_3d)
 #endif
+#if defined(AUDIOHW_HAVE_FILTER_ROLL_OFF)
+    AUDIOHW_SETTING_ENT(FILTER_ROLL_OFF,    sound_set_filter_roll_off)
+#endif
 /* Hardware EQ tone controls */
 #if defined(AUDIOHW_HAVE_EQ)
     AUDIOHW_SETTING_ENT(EQ_BAND1_GAIN,      sound_set_hw_eq_band1_gain)

firmware/export/sound.h

@@ -51,6 +51,10 @@ void sound_set_treble_cutoff(int value);
 void sound_set_depth_3d(int value);
 #endif
 
+#if defined(AUDIOHW_HAVE_FILTER_ROLL_OFF)
+void sound_set_filter_roll_off(int value);
+#endif
+
 #ifdef AUDIOHW_HAVE_EQ
 /*
  * band = SOUND_EQ_BANDb

firmware/sound.c

@@ -314,6 +314,16 @@ void sound_set_depth_3d(int value)
 }
 #endif /* AUDIOHW_HAVE_DEPTH_3D */
 
+#if defined(AUDIOHW_HAVE_FILTER_ROLL_OFF)
+void sound_set_filter_roll_off(int value)
+{
+    if (!audio_is_initialized)
+        return;
+
+    audiohw_set_filter_roll_off(value);
+}
+#endif
+
 #if defined(AUDIOHW_HAVE_EQ)
 int sound_enum_hw_eq_band_setting(unsigned int band,
                                   unsigned int band_setting)