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_VISUALIZER_H_ 18 #define ANDROID_EFFECT_VISUALIZER_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_VISUALIZATION_ = 28 { 0xe46b26a0, 0xdddd, 0x11db, 0x8afd, { 0x00, 0x02, 0xa5, 0xd5, 0xc5, 0x1b } }; 29 const effect_uuid_t * const SL_IID_VISUALIZATION = &SL_IID_VISUALIZATION_; 30 #endif //OPENSL_ES_H_ 31 32 #define VISUALIZER_CAPTURE_SIZE_MAX 1024 // maximum capture size in samples 33 #define VISUALIZER_CAPTURE_SIZE_MIN 128 // minimum capture size in samples 34 35 // to keep in sync with frameworks/base/media/java/android/media/audiofx/Visualizer.java 36 #define VISUALIZER_SCALING_MODE_NORMALIZED 0 37 #define VISUALIZER_SCALING_MODE_AS_PLAYED 1 38 39 #define MEASUREMENT_MODE_NONE 0x0 40 #define MEASUREMENT_MODE_PEAK_RMS 0x1 41 42 #define MEASUREMENT_IDX_PEAK 0 43 #define MEASUREMENT_IDX_RMS 1 44 #define MEASUREMENT_COUNT 2 45 46 /* enumerated parameters for Visualizer effect */ 47 typedef enum 48 { 49 VISUALIZER_PARAM_CAPTURE_SIZE, // Sets the number PCM samples in the capture. 50 VISUALIZER_PARAM_SCALING_MODE, // Sets the way the captured data is scaled 51 VISUALIZER_PARAM_LATENCY, // Informs the visualizer about the downstream latency 52 VISUALIZER_PARAM_MEASUREMENT_MODE, // Sets which measurements are to be made 53 } t_visualizer_params; 54 55 /* commands */ 56 typedef enum 57 { 58 VISUALIZER_CMD_CAPTURE = EFFECT_CMD_FIRST_PROPRIETARY, // Gets the latest PCM capture. 59 VISUALIZER_CMD_MEASURE, // Gets the current measurements 60 }t_visualizer_cmds; 61 62 // VISUALIZER_CMD_CAPTURE retrieves the latest PCM snapshot captured by the visualizer engine. 63 // It returns the number of samples specified by VISUALIZER_PARAM_CAPTURE_SIZE 64 // in 8 bit unsigned format (0 = 0x80) 65 66 // VISUALIZER_CMD_MEASURE retrieves the lastest measurements as int32_t saved in the 67 // MEASUREMENT_IDX_* array index order. 68 69 #if __cplusplus 70 } // extern "C" 71 #endif 72 73 74 #endif /*ANDROID_EFFECT_VISUALIZER_H_*/ 75
