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authorEric Laurent <elaurent@google.com>2012-08-24 14:17:34 -0700
committerEric Laurent <elaurent@google.com>2012-08-24 14:17:34 -0700
commite44615ff6022239850a3ea459ad6e07b44c37544 (patch)
tree67b26af98c6bff960193a642bf0a48181c1cee43 /media/libeffects/lvm
parent9a150640a28d3fa5507a590125a6c004681bb221 (diff)
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Reduce THD when equalizer is ON.
Increase headroom in LVM bundle to reduce THD when equalizer is ON with high band gains. Also add a workaround for a bug in headroom parameter control. Change-Id: I1d67c9ae475f6cf852c2e0e49bacfc82a5e484fd
Diffstat (limited to 'media/libeffects/lvm')
-rw-r--r--media/libeffects/lvm/lib/Bundle/src/LVM_Init.c4
-rw-r--r--media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp4
2 files changed, 5 insertions, 3 deletions
diff --git a/media/libeffects/lvm/lib/Bundle/src/LVM_Init.c b/media/libeffects/lvm/lib/Bundle/src/LVM_Init.c
index 20370b7..dd34fb5 100644
--- a/media/libeffects/lvm/lib/Bundle/src/LVM_Init.c
+++ b/media/libeffects/lvm/lib/Bundle/src/LVM_Init.c
@@ -557,7 +557,9 @@ LVM_ReturnStatus_en LVM_GetInstanceHandle(LVM_Handle_t *phInstance,
*/
pInstance->Params.OperatingMode = LVM_MODE_OFF;
pInstance->Params.SampleRate = LVM_FS_8000;
- pInstance->Params.SourceFormat = LVM_MONO;
+// FIXME: Workaround to avoid reset of headroom parameters on first call to LVM_Process.
+// pInstance->Params.SourceFormat = LVM_MONO;
+ pInstance->Params.SourceFormat = LVM_STEREO;
pInstance->Params.SpeakerType = LVM_HEADPHONES;
pInstance->Params.VC_EffectLevel = 0;
pInstance->Params.VC_Balance = 0;
diff --git a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
index 1a45e35..32ee89e 100644
--- a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
+++ b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp
@@ -698,10 +698,10 @@ int LvmBundle_init(EffectContext *pContext){
/* Set the headroom parameters */
HeadroomBandDef[0].Limit_Low = 20;
HeadroomBandDef[0].Limit_High = 4999;
- HeadroomBandDef[0].Headroom_Offset = 3;
+ HeadroomBandDef[0].Headroom_Offset = 0;
HeadroomBandDef[1].Limit_Low = 5000;
HeadroomBandDef[1].Limit_High = 24000;
- HeadroomBandDef[1].Headroom_Offset = 4;
+ HeadroomBandDef[1].Headroom_Offset = 0;
HeadroomParams.pHeadroomDefinition = &HeadroomBandDef[0];
HeadroomParams.Headroom_OperatingMode = LVM_HEADROOM_ON;
HeadroomParams.NHeadroomBands = 2;