1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_EFFECT_EQUALIZER_H_ 18 #define ANDROID_EFFECT_EQUALIZER_H_ 19 20 #include <hardware/audio_effect.h> 21 22 #ifndef OPENSL_ES_H_ 23 static const effect_uuid_t SL_IID_EQUALIZER_ = { 0x0bed4300, 0xddd6, 0x11db, 0x8f34, { 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b } }; 24 const effect_uuid_t * const SL_IID_EQUALIZER = &SL_IID_EQUALIZER_; 25 #endif //OPENSL_ES_H_ 26 27 #if __cplusplus 28 extern "C" { 29 #endif 30 31 /* enumerated parameters for Equalizer effect */ 32 typedef enum 33 { 34 EQ_PARAM_NUM_BANDS, // Gets the number of frequency bands that the equalizer supports. 35 EQ_PARAM_LEVEL_RANGE, // Returns the minimum and maximum band levels supported. 36 EQ_PARAM_BAND_LEVEL, // Gets/Sets the gain set for the given equalizer band. 37 EQ_PARAM_CENTER_FREQ, // Gets the center frequency of the given band. 38 EQ_PARAM_BAND_FREQ_RANGE, // Gets the frequency range of the given frequency band. 39 EQ_PARAM_GET_BAND, // Gets the band that has the most effect on the given frequency. 40 EQ_PARAM_CUR_PRESET, // Gets/Sets the current preset. 41 EQ_PARAM_GET_NUM_OF_PRESETS, // Gets the total number of presets the equalizer supports. 42 EQ_PARAM_GET_PRESET_NAME, // Gets the preset name based on the index. 43 EQ_PARAM_PROPERTIES // Gets/Sets all parameters at a time. 44 } t_equalizer_params; 45 46 //t_equalizer_settings groups all current equalizer setting for backup and restore. 47 typedef struct s_equalizer_settings { 48 uint16_t curPreset; 49 uint16_t numBands; 50 uint16_t bandLevels[]; 51 } t_equalizer_settings; 52 53 #if __cplusplus 54 } // extern "C" 55 #endif 56 57 58 #endif /*ANDROID_EFFECT_EQUALIZER_H_*/ 59
