/* * Copyright (C) 2016 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. */ package android.hardware.audio.effect@2.0; import android.hardware.audio.common@2.0; import IEffect; interface IEqualizerEffect extends IEffect { /** * Gets the number of frequency bands that the equalizer supports. */ getNumBands() generates (Result retval, uint16_t numBands); /** * Returns the minimum and maximum band levels supported. */ getLevelRange() generates (Result retval, int16_t minLevel, int16_t maxLevel); /** * Sets the gain for the given equalizer band. */ setBandLevel(uint16_t band, int16_t level) generates (Result retval); /** * Gets the gain for the given equalizer band. */ getBandLevel(uint16_t band) generates (Result retval, int16_t level); /** * Gets the center frequency of the given band, in milliHertz. */ getBandCenterFrequency(uint16_t band) generates (Result retval, uint32_t centerFreqmHz); /** * Gets the frequency range of the given frequency band, in milliHertz. */ getBandFrequencyRange(uint16_t band) generates (Result retval, uint32_t minFreqmHz, uint32_t maxFreqmHz); /** * Gets the band that has the most effect on the given frequency * in milliHertz. */ getBandForFrequency(uint32_t freqmHz) generates (Result retval, uint16_t band); /** * Gets the names of all presets the equalizer supports. */ getPresetNames() generates (Result retval, vec names); /** * Sets the current preset using the index of the preset in the names * vector returned via 'getPresetNames'. */ setCurrentPreset(uint16_t preset) generates (Result retval); /** * Gets the current preset. */ getCurrentPreset() generates (Result retval, uint16_t preset); struct AllProperties { uint16_t curPreset; vec bandLevels; }; /** * Sets all properties at once. */ setAllProperties(AllProperties properties) generates (Result retval); /** * Gets all properties at once. */ getAllProperties() generates (Result retval, AllProperties properties); };