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/*
* Copyright (C) 2015 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.
*/
namespace android {
class VolumeCurvePoint
{
public:
int mIndex;
float mDBAttenuation;
};
class StreamDescriptor;
class ApmGains
{
public :
// 4 points to define the volume attenuation curve, each characterized by the volume
// index (from 0 to 100) at which they apply, and the attenuation in dB at that index.
// we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl()
enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4};
// device categories used for volume curve management.
enum device_category {
DEVICE_CATEGORY_HEADSET,
DEVICE_CATEGORY_SPEAKER,
DEVICE_CATEGORY_EARPIECE,
DEVICE_CATEGORY_EXT_MEDIA,
DEVICE_CATEGORY_CNT
};
// returns the category the device belongs to with regard to volume curve management
static ApmGains::device_category getDeviceCategory(audio_devices_t device);
// extract one device relevant for volume control from multiple device selection
static audio_devices_t getDeviceForVolume(audio_devices_t device);
static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc,
int indexInUi);
// default volume curve
static const VolumeCurvePoint sDefaultVolumeCurve[ApmGains::VOLCNT];
// default volume curve for media strategy
static const VolumeCurvePoint sDefaultMediaVolumeCurve[ApmGains::VOLCNT];
// volume curve for non-media audio on ext media outputs (HDMI, Line, etc)
static const VolumeCurvePoint sExtMediaSystemVolumeCurve[ApmGains::VOLCNT];
// volume curve for media strategy on speakers
static const VolumeCurvePoint sSpeakerMediaVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[ApmGains::VOLCNT];
// volume curve for sonification strategy on speakers
static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[ApmGains::VOLCNT];
static const VolumeCurvePoint sDefaultSystemVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[ApmGains::VOLCNT];
static const VolumeCurvePoint sHeadsetSystemVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sDefaultVoiceVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sLinearVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sSilentVolumeCurve[ApmGains::VOLCNT];
static const VolumeCurvePoint sFullScaleVolumeCurve[ApmGains::VOLCNT];
// default volume curves per stream and device category. See initializeVolumeCurves()
static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][ApmGains::DEVICE_CATEGORY_CNT];
};
class AudioGain: public RefBase
{
public:
AudioGain(int index, bool useInChannelMask);
virtual ~AudioGain() {}
void dump(int fd, int spaces, int index) const;
void getDefaultConfig(struct audio_gain_config *config);
status_t checkConfig(const struct audio_gain_config *config);
int mIndex;
struct audio_gain mGain;
bool mUseInChannelMask;
};
// stream descriptor used for volume control
class StreamDescriptor
{
public:
StreamDescriptor();
int getVolumeIndex(audio_devices_t device);
void dump(int fd);
int mIndexMin; // min volume index
int mIndexMax; // max volume index
KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device
bool mCanBeMuted; // true is the stream can be muted
const VolumeCurvePoint *mVolumeCurve[ApmGains::DEVICE_CATEGORY_CNT];
};
}; // namespace android
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