1 /* 2 * Copyright (C) 2016 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_DOWNMIX_CORE_H_ 18 #define ANDROID_EFFECT_DOWNMIX_CORE_H_ 19 20 #include <system/audio_effect.h> 21 22 #if __cplusplus 23 extern "C" { 24 #endif 25 26 #define EFFECT_UIID_DOWNMIX__ { 0x381e49cc, 0xa858, 0x4aa2, 0x87f6, \ 27 { 0xe8, 0x38, 0x8e, 0x76, 0x01, 0xb2 } } 28 static const effect_uuid_t EFFECT_UIID_DOWNMIX_ = EFFECT_UIID_DOWNMIX__; 29 const effect_uuid_t * const EFFECT_UIID_DOWNMIX = &EFFECT_UIID_DOWNMIX_; 30 31 32 /* enumerated parameter settings for downmix effect */ 33 typedef enum { 34 DOWNMIX_PARAM_TYPE 35 } downmix_params_t; 36 37 38 typedef enum { 39 DOWNMIX_TYPE_INVALID = -1, 40 // throw away the extra channels 41 DOWNMIX_TYPE_STRIP = 0, 42 // mix the extra channels with FL/FR 43 DOWNMIX_TYPE_FOLD = 1, 44 DOWNMIX_TYPE_CNT, 45 DOWNMIX_TYPE_LAST = DOWNMIX_TYPE_CNT - 1 46 } downmix_type_t; 47 48 #if __cplusplus 49 } // extern "C" 50 #endif 51 52 53 #endif /*ANDROID_EFFECT_DOWNMIX_CORE_H_*/ 54
