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_VIRTUALIZER_H_ 18 #define ANDROID_EFFECT_VIRTUALIZER_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_VIRTUALIZER_ = { 0x37cc2c00, 0xdddd, 0x11db, 0x8577, 28 { 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b } }; 29 const effect_uuid_t * const SL_IID_VIRTUALIZER = &SL_IID_VIRTUALIZER_; 30 #endif //OPENSL_ES_H_ 31 32 /* enumerated parameter settings for virtualizer effect */ 33 /* to keep in sync with frameworks/base/media/java/android/media/audiofx/Virtualizer.java */ 34 typedef enum 35 { 36 VIRTUALIZER_PARAM_STRENGTH_SUPPORTED, 37 VIRTUALIZER_PARAM_STRENGTH, 38 // used with EFFECT_CMD_GET_PARAM 39 // format: 40 // parameters int32_t VIRTUALIZER_PARAM_VIRTUAL_SPEAKER_ANGLES 41 // audio_channel_mask_t input channel mask 42 // audio_devices_t audio output device 43 // output int32_t* an array of length 3 * the number of channels in the mask 44 // where entries are the succession of the channel mask 45 // of each speaker (i.e. a single bit is selected in the 46 // channel mask) followed by the azimuth and the 47 // elevation angles. 48 // status int -EINVAL if configuration is not supported or invalid or not forcing 49 // 0 if configuration is supported and the mode is forced 50 // notes: 51 // - all angles are expressed in degrees and are relative to the listener, 52 // - for azimuth: 0 is the direction the listener faces, 180 is behind the listener, and 53 // -90 is to her/his left, 54 // - for elevation: 0 is the horizontal plane, +90 is above the listener, -90 is below. 55 VIRTUALIZER_PARAM_VIRTUAL_SPEAKER_ANGLES, 56 // used with EFFECT_CMD_SET_PARAM 57 // format: 58 // parameters int32_t VIRTUALIZER_PARAM_FORCE_VIRTUALIZATION_MODE 59 // audio_devices_t audio output device 60 // status int -EINVAL if the device is not supported or invalid 61 // 0 if the device is supported and the mode is forced, or forcing 62 // was disabled for the AUDIO_DEVICE_NONE audio device. 63 VIRTUALIZER_PARAM_FORCE_VIRTUALIZATION_MODE, 64 // used with EFFECT_CMD_GET_PARAM 65 // format: 66 // parameters int32_t VIRTUALIZER_PARAM_VIRTUALIZATION_MODE 67 // output audio_device_t audio device reflecting the current virtualization mode, 68 // AUDIO_DEVICE_NONE when not virtualizing 69 // status int -EINVAL if an error occurred 70 // 0 if the output value is successfully retrieved 71 VIRTUALIZER_PARAM_VIRTUALIZATION_MODE 72 } t_virtualizer_params; 73 74 #if __cplusplus 75 } // extern "C" 76 #endif 77 78 79 #endif /*ANDROID_EFFECT_VIRTUALIZER_H_*/ 80
