From 572e512bbedc361d211dc48a4fb2b74301368f6f Mon Sep 17 00:00:00 2001
From: Dheeraj CVR <cvr.dheeraj@gmail.com>
Date: Tue, 19 May 2015 00:56:45 +0400
Subject: audio: enable noise suppression by default

Framework was responsible for enabling or disabling the noise suppression using
audio parameters. However, this is currently broken in lollipop and most of the
newer devices have noise suppression enabled by default.

Use noise suppression when using the default input device (main microphone).

Change-Id: Ie8bdfe1d9860fdad996640d1664e8111df7d3cec
---
 audio/audio_hw.c                                   | 34 ++++++++++++----------
 overlay/packages/apps/Phone                        |  1 -
 .../services/Telephony/res/values/config.xml       | 25 ----------------
 3 files changed, 19 insertions(+), 41 deletions(-)
 delete mode 120000 overlay/packages/apps/Phone
 delete mode 100644 overlay/packages/services/Telephony/res/values/config.xml

diff --git a/audio/audio_hw.c b/audio/audio_hw.c
index d53cd94..f266c35 100644
--- a/audio/audio_hw.c
+++ b/audio/audio_hw.c
@@ -200,6 +200,7 @@ struct m0_dev_cfg {
 
 static void select_output_device(struct m0_audio_device *adev);
 static void select_input_device(struct m0_audio_device *adev);
+static void set_noise_supression(struct m0_audio_device *adev, int enable);
 static int adev_set_voice_volume(struct audio_hw_device *dev, float volume);
 static int do_input_standby(struct m0_stream_in *in);
 static int do_output_standby(struct m0_stream_out *out);
@@ -593,6 +594,7 @@ static void select_mode(struct m0_audio_device *adev)
             set_bigroute_by_array(adev->mixer, voicecall_default_disable, 1);
             ALOGD("%s: set voicecall route: default_input_disable", __func__);
             set_bigroute_by_array(adev->mixer, default_input_disable, 1);
+            set_noise_supression(adev, 0);
             ALOGD("%s: set voicecall route: headset_input_disable", __func__);
             set_bigroute_by_array(adev->mixer, headset_input_disable, 1);
             ALOGD("%s: set voicecall route: bt_disable", __func__);
@@ -671,9 +673,11 @@ static void select_output_device(struct m0_audio_device *adev)
         if (speaker_on || earpiece_on || headphone_on) {
             ALOGD("%s: set voicecall route: default_input", __func__);
             set_bigroute_by_array(adev->mixer, default_input, 1);
+            set_noise_supression(adev, 1);
         } else {
             ALOGD("%s: set voicecall route: default_input_disable", __func__);
             set_bigroute_by_array(adev->mixer, default_input_disable, 1);
+            set_noise_supression(adev, 0);
         }
 
         if (headset_on) {
@@ -726,6 +730,21 @@ static void select_input_device(struct m0_audio_device *adev)
     select_devices(adev);
 }
 
+static void set_noise_supression(struct m0_audio_device *adev, int enable)
+{
+    if (enable) {
+        // Enable Noise suppression for builtin microphone
+        ALOGE("%s: enabling two mic control", __func__);
+        ril_set_two_mic_control(&adev->ril, AUDIENCE, TWO_MIC_SOLUTION_ON);
+        set_bigroute_by_array(adev->mixer, noise_suppression, 1);
+    } else {
+        // Disable Noise suppression for builtin microphone
+        ALOGE("%s: disabling two mic control", __func__);
+        ril_set_two_mic_control(&adev->ril, AUDIENCE, TWO_MIC_SOLUTION_OFF);
+        set_bigroute_by_array(adev->mixer, noise_suppression_disable, 1);
+    }
+}
+
 /* must be called with hw device and output stream mutexes locked */
 static int start_output_stream_low_latency(struct m0_stream_out *out)
 {
@@ -2543,21 +2562,6 @@ static int adev_set_parameters(struct audio_hw_device *dev, const char *kvpairs)
             adev->screen_off = true;
     }
 
-    ret = str_parms_get_str(parms, "noise_suppression", value, sizeof(value));
-    if (ret >= 0) {
-        if (strcmp(value, "true") == 0) {
-            ALOGE("%s: enabling two mic control", __func__);
-            ril_set_two_mic_control(&adev->ril, AUDIENCE, TWO_MIC_SOLUTION_ON);
-            /* sub mic */
-            set_bigroute_by_array(adev->mixer, noise_suppression, 1);
-        } else {
-            ALOGE("%s: disabling two mic control", __func__);
-            ril_set_two_mic_control(&adev->ril, AUDIENCE, TWO_MIC_SOLUTION_OFF);
-            /* sub mic */
-            set_bigroute_by_array(adev->mixer, noise_suppression_disable, 1);
-        }
-    }
-
     str_parms_destroy(parms);
     return ret;
 }
diff --git a/overlay/packages/apps/Phone b/overlay/packages/apps/Phone
deleted file mode 120000
index 0f8d39e..0000000
--- a/overlay/packages/apps/Phone
+++ /dev/null
@@ -1 +0,0 @@
-../services/Telephony/
\ No newline at end of file
diff --git a/overlay/packages/services/Telephony/res/values/config.xml b/overlay/packages/services/Telephony/res/values/config.xml
deleted file mode 100644
index 23ec4e4..0000000
--- a/overlay/packages/services/Telephony/res/values/config.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2009 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
-<!-- Phone app resources that may need to be customized
-     for different hardware or product builds. -->
-<resources>
-    <!-- Determines if device implements a noise suppression device for in call audio-->
-    <bool name="has_in_call_noise_suppression">true</bool>
-
-    <!-- Audio parameter for setting noise suppression-->
-    <string name="in_call_noise_suppression_audioparameter">noise_suppression=true=false</string>
-</resources>
-- 
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