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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_ENVIRONMENTALREVERB_H_
     18 #define ANDROID_EFFECT_ENVIRONMENTALREVERB_H_
     19 
     20 #include <hardware/audio_effect.h>
     21 
     22 #if __cplusplus
     23 extern "C" {
     24 #endif
     25 
     26 #ifndef OPENSL_ES_H_
     27 static const effect_uuid_t SL_IID_ENVIRONMENTALREVERB_ = { 0xc2e5d5f0, 0x94bd, 0x4763, 0x9cac,
     28         { 0x4e, 0x23, 0x4d, 0x6, 0x83, 0x9e } };
     29 const effect_uuid_t * const SL_IID_ENVIRONMENTALREVERB = &SL_IID_ENVIRONMENTALREVERB_;
     30 #endif //OPENSL_ES_H_
     31 
     32 /* enumerated parameter settings for environmental reverb effect */
     33 typedef enum
     34 {
     35     // Parameters below are as defined in OpenSL ES specification for environmental reverb interface
     36     REVERB_PARAM_ROOM_LEVEL,            // in millibels,    range -6000 to 0
     37     REVERB_PARAM_ROOM_HF_LEVEL,         // in millibels,    range -4000 to 0
     38     REVERB_PARAM_DECAY_TIME,            // in milliseconds, range 100 to 20000
     39     REVERB_PARAM_DECAY_HF_RATIO,        // in permilles,    range 100 to 1000
     40     REVERB_PARAM_REFLECTIONS_LEVEL,     // in millibels,    range -6000 to 0
     41     REVERB_PARAM_REFLECTIONS_DELAY,     // in milliseconds, range 0 to 65
     42     REVERB_PARAM_REVERB_LEVEL,          // in millibels,    range -6000 to 0
     43     REVERB_PARAM_REVERB_DELAY,          // in milliseconds, range 0 to 65
     44     REVERB_PARAM_DIFFUSION,             // in permilles,    range 0 to 1000
     45     REVERB_PARAM_DENSITY,               // in permilles,    range 0 to 1000
     46     REVERB_PARAM_PROPERTIES,
     47     REVERB_PARAM_BYPASS
     48 } t_env_reverb_params;
     49 
     50 //t_reverb_settings is equal to SLEnvironmentalReverbSettings defined in OpenSL ES specification.
     51 typedef struct s_reverb_settings {
     52     int16_t     roomLevel;
     53     int16_t     roomHFLevel;
     54     uint32_t    decayTime;
     55     int16_t     decayHFRatio;
     56     int16_t     reflectionsLevel;
     57     uint32_t    reflectionsDelay;
     58     int16_t     reverbLevel;
     59     uint32_t    reverbDelay;
     60     int16_t     diffusion;
     61     int16_t     density;
     62 } __attribute__((packed)) t_reverb_settings;
     63 
     64 
     65 #if __cplusplus
     66 }  // extern "C"
     67 #endif
     68 
     69 
     70 #endif /*ANDROID_EFFECT_ENVIRONMENTALREVERB_H_*/
     71