From 0b6a930096bb6fc6d8482044357836c55db90636 Mon Sep 17 00:00:00 2001
From: Eric Laurent <elaurent@google.com>
Date: Tue, 25 May 2010 09:31:59 -0700
Subject: [PATCH] Fix issue 2641884: Bluetooth volume is dependent on in call
 volume.

The problem is that the code in AudioPolicyManagerBase::checkAndSetVolume() that forces
voice volume to max when setting bluetooth SCO volume is not called if the bluetooth stream
volume did not actually change. So even if we re apply volumes when switching to bluetooth
device, the volume voice volume is not changed and remains what it was when routed to earpiece
What makes things worse on Passion is that stream volumes are limited when connected to bluetooth
and their actual value does not change as soon as they exceed the limit threshold.

Change-Id: I18265e5e6686db0a1f30fc37a31e2ecde4f3fbc6
---
 libs/audioflinger/AudioPolicyManagerBase.cpp | 34 +++++++++++++-------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/libs/audioflinger/AudioPolicyManagerBase.cpp b/libs/audioflinger/AudioPolicyManagerBase.cpp
index 381a95803..549d66118 100644
--- a/libs/audioflinger/AudioPolicyManagerBase.cpp
+++ b/libs/audioflinger/AudioPolicyManagerBase.cpp
@@ -902,7 +902,8 @@ AudioPolicyManagerBase::AudioPolicyManagerBase(AudioPolicyClientInterface *clien
 #ifdef AUDIO_POLICY_TEST
     Thread(false),
 #endif //AUDIO_POLICY_TEST
-    mPhoneState(AudioSystem::MODE_NORMAL), mRingerMode(0), mMusicStopTime(0), mLimitRingtoneVolume(false)
+    mPhoneState(AudioSystem::MODE_NORMAL), mRingerMode(0), mMusicStopTime(0), mLimitRingtoneVolume(false),
+    mLastVoiceVolume(-1.0f)
 {
     mpClientInterface = clientInterface;
 
@@ -1713,29 +1714,38 @@ status_t AudioPolicyManagerBase::checkAndSetVolume(int stream, int index, audio_
     }
 
     float volume = computeVolume(stream, index, output, device);
-    // do not set volume if the float value did not change
-    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] || force) {
+    // We actually change the volume if:
+    // - the float value returned by computeVolume() changed
+    // - the force flag is set
+    if (volume != mOutputs.valueFor(output)->mCurVolume[stream] ||
+            force) {
         mOutputs.valueFor(output)->mCurVolume[stream] = volume;
         LOGV("setStreamVolume() for output %d stream %d, volume %f, delay %d", output, stream, volume, delayMs);
         if (stream == AudioSystem::VOICE_CALL ||
             stream == AudioSystem::DTMF ||
             stream == AudioSystem::BLUETOOTH_SCO) {
-            float voiceVolume = -1.0;
             // offset value to reflect actual hardware volume that never reaches 0
             // 1% corresponds roughly to first step in VOICE_CALL stream volume setting (see AudioService.java)
             volume = 0.01 + 0.99 * volume;
-            if (stream == AudioSystem::VOICE_CALL) {
-                voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
-            } else if (stream == AudioSystem::BLUETOOTH_SCO) {
-                voiceVolume = 1.0;
-            }
-            if (voiceVolume >= 0 && output == mHardwareOutput) {
-                mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
-            }
         }
         mpClientInterface->setStreamVolume((AudioSystem::stream_type)stream, volume, output, delayMs);
     }
 
+    if (stream == AudioSystem::VOICE_CALL ||
+        stream == AudioSystem::BLUETOOTH_SCO) {
+        float voiceVolume;
+        // Force voice volume to max for bluetooth SCO as volume is managed by the headset
+        if (stream == AudioSystem::VOICE_CALL) {
+            voiceVolume = (float)index/(float)mStreams[stream].mIndexMax;
+        } else {
+            voiceVolume = 1.0;
+        }
+        if (voiceVolume != mLastVoiceVolume && output == mHardwareOutput) {
+            mpClientInterface->setVoiceVolume(voiceVolume, delayMs);
+            mLastVoiceVolume = voiceVolume;
+        }
+    }
+
     return NO_ERROR;
 }