diff options
Diffstat (limited to 'services/audiopolicy/enginedefault/src/Gains.cpp')
| -rw-r--r-- | services/audiopolicy/enginedefault/src/Gains.cpp | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/services/audiopolicy/enginedefault/src/Gains.cpp b/services/audiopolicy/enginedefault/src/Gains.cpp index a684fdd..78f2909 100644 --- a/services/audiopolicy/enginedefault/src/Gains.cpp +++ b/services/audiopolicy/enginedefault/src/Gains.cpp @@ -197,10 +197,10 @@ const VolumeCurvePoint *Gains::sVolumeProfiles[AUDIO_STREAM_CNT] }; //static -float Gains::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, - int indexInUi) +float Gains::volIndexToDb(Volume::device_category deviceCategory, + const StreamDescriptor& streamDesc, + int indexInUi) { - Volume::device_category deviceCategory = Volume::getDeviceCategory(device); const VolumeCurvePoint *curve = streamDesc.getVolumeCurvePoint(deviceCategory); // the volume index in the UI is relative to the min and max volume indices for this stream type @@ -212,7 +212,7 @@ float Gains::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& stre // find what part of the curve this index volume belongs to, or if it's out of bounds int segment = 0; if (volIdx < curve[Volume::VOLMIN].mIndex) { // out of bounds - return 0.0f; + return VOLUME_MIN_DB; } else if (volIdx < curve[Volume::VOLKNEE1].mIndex) { segment = 0; } else if (volIdx < curve[Volume::VOLKNEE2].mIndex) { @@ -220,7 +220,7 @@ float Gains::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& stre } else if (volIdx <= curve[Volume::VOLMAX].mIndex) { segment = 2; } else { // out of bounds - return 1.0f; + return 0.0f; } // linear interpolation in the attenuation table in dB @@ -231,17 +231,25 @@ float Gains::volIndexToAmpl(audio_devices_t device, const StreamDescriptor& stre ((float)(curve[segment+1].mIndex - curve[segment].mIndex)) ); - float amplification = exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 ) - - ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f] ampl=%.5f", + ALOGVV("VOLUME vol index=[%d %d %d], dB=[%.1f %.1f %.1f]", curve[segment].mIndex, volIdx, curve[segment+1].mIndex, curve[segment].mDBAttenuation, decibels, - curve[segment+1].mDBAttenuation, - amplification); + curve[segment+1].mDBAttenuation); + + return decibels; +} - return amplification; + +//static +float Gains::volIndexToAmpl(Volume::device_category deviceCategory, + const StreamDescriptor& streamDesc, + int indexInUi) +{ + return Volume::DbToAmpl(volIndexToDb(deviceCategory, streamDesc, indexInUi)); } + + }; // namespace android |