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      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_AEC_H_
     18 #define ANDROID_EFFECT_AEC_H_
     19 
     20 #include <hardware/audio_effect.h>
     21 
     22 #if __cplusplus
     23 extern "C" {
     24 #endif
     25 
     26 // The AEC type UUID is not defined by OpenSL ES and has been generated from
     27 // http://www.itu.int/ITU-T/asn1/uuid.html
     28 static const effect_uuid_t FX_IID_AEC_ =
     29     { 0x7b491460, 0x8d4d, 0x11e0, 0xbd61, { 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b } };
     30 const effect_uuid_t * const FX_IID_AEC = &FX_IID_AEC_;
     31 
     32 typedef enum
     33 {
     34     AEC_PARAM_ECHO_DELAY,           // echo delay in microseconds
     35     AEC_PARAM_PROPERTIES
     36 } t_aec_params;
     37 
     38 //t_equalizer_settings groups all current aec settings for backup and restore.
     39 typedef struct s_aec_settings {
     40     uint32_t echoDelay;
     41 } t_aec_settings;
     42 
     43 #if __cplusplus
     44 }  // extern "C"
     45 #endif
     46 
     47 
     48 #endif /*ANDROID_EFFECT_AEC_H_*/
     49