1 /* 2 * Copyright (C) 2015 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 #pragma once 18 19 #include <system/audio.h> 20 21 static const audio_format_t gDynamicFormat = AUDIO_FORMAT_DEFAULT; 22 23 // For mixed output and inputs, the policy will use max mixer sampling rates. 24 // Do not limit sampling rate otherwise 25 #define SAMPLE_RATE_HZ_MAX 192000 26 27 // Used when a client opens a capture stream, without specifying a desired sample rate. 28 #define SAMPLE_RATE_HZ_DEFAULT 48000 29 30 // For mixed output and inputs, the policy will use max mixer channel count. 31 // Do not limit channel count otherwise 32 #define MAX_MIXER_CHANNEL_COUNT FCC_8 33 34 /** 35 * A device mask for all audio input devices that are considered "virtual" when evaluating 36 * active inputs in getActiveInputs() 37 */ 38 #define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX|\ 39 AUDIO_DEVICE_IN_BUS|AUDIO_DEVICE_IN_FM_TUNER) 40 41 42 /** 43 * A device mask for all audio input and output devices where matching inputs/outputs on device 44 * type alone is not enough: the address must match too 45 */ 46 #define APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL (AUDIO_DEVICE_OUT_REMOTE_SUBMIX|AUDIO_DEVICE_OUT_BUS) 47 48 #define APM_AUDIO_DEVICE_IN_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_BUS) 49 50 /** 51 * Alias to AUDIO_DEVICE_OUT_DEFAULT defined for clarification when this value is used by volume 52 * control APIs (e.g setStreamVolumeIndex(). 53 */ 54 #define AUDIO_DEVICE_OUT_DEFAULT_FOR_VOLUME AUDIO_DEVICE_OUT_DEFAULT 55 56 57 /** 58 * Check if the state given correspond to an in call state. 59 * @TODO find a better name for widely call state 60 * 61 * @param[in] state to consider 62 * 63 * @return true if given state represents a device in a telephony or VoIP call 64 */ 65 static inline bool is_state_in_call(int state) 66 { 67 return (state == AUDIO_MODE_IN_CALL) || (state == AUDIO_MODE_IN_COMMUNICATION); 68 } 69 70 /** 71 * Check if the input device given is considered as a virtual device. 72 * 73 * @param[in] device to consider 74 * 75 * @return true if the device is a virtual one, false otherwise. 76 */ 77 static inline bool is_virtual_input_device(audio_devices_t device) 78 { 79 if ((device & AUDIO_DEVICE_BIT_IN) != 0) { 80 device &= ~AUDIO_DEVICE_BIT_IN; 81 if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0)) 82 return true; 83 } 84 return false; 85 } 86 87 /** 88 * Check whether the device type is one 89 * where addresses are used to distinguish between one connected device and another 90 * 91 * @param[in] device to consider 92 * 93 * @return true if the device needs distinguish on address, false otherwise.. 94 */ 95 static inline bool device_distinguishes_on_address(audio_devices_t device) 96 { 97 return (((device & AUDIO_DEVICE_BIT_IN) != 0) && 98 ((~AUDIO_DEVICE_BIT_IN & device & APM_AUDIO_DEVICE_IN_MATCH_ADDRESS_ALL) != 0)) || 99 (((device & AUDIO_DEVICE_BIT_IN) == 0) && 100 ((device & APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL) != 0)); 101 } 102 103 /** 104 * Returns the priority of a given audio source for capture. The priority is used when more than one 105 * capture session is active on a given input stream to determine which session drives routing and 106 * effect configuration. 107 * 108 * @param[in] inputSource to consider. Valid sources are: 109 * - AUDIO_SOURCE_VOICE_COMMUNICATION 110 * - AUDIO_SOURCE_CAMCORDER 111 * - AUDIO_SOURCE_MIC 112 * - AUDIO_SOURCE_FM_TUNER 113 * - AUDIO_SOURCE_VOICE_RECOGNITION 114 * - AUDIO_SOURCE_HOTWORD 115 * 116 * @return the corresponding input source priority or 0 if priority is irrelevant for this source. 117 * This happens when the specified source cannot share a given input stream (e.g remote submix) 118 * The higher the value, the higher the priority. 119 */ 120 static inline int32_t source_priority(audio_source_t inputSource) 121 { 122 switch (inputSource) { 123 case AUDIO_SOURCE_VOICE_COMMUNICATION: 124 return 6; 125 case AUDIO_SOURCE_CAMCORDER: 126 return 5; 127 case AUDIO_SOURCE_MIC: 128 return 4; 129 case AUDIO_SOURCE_FM_TUNER: 130 return 3; 131 case AUDIO_SOURCE_VOICE_RECOGNITION: 132 return 2; 133 case AUDIO_SOURCE_HOTWORD: 134 return 1; 135 default: 136 break; 137 } 138 return 0; 139 } 140 141 /* Indicates if audio formats are equivalent when considering a match between 142 * audio HAL supported formats and client requested formats 143 */ 144 static inline bool audio_formats_match(audio_format_t format1, 145 audio_format_t format2) 146 { 147 if (audio_is_linear_pcm(format1) && 148 (audio_bytes_per_sample(format1) > 2) && 149 audio_is_linear_pcm(format2) && 150 (audio_bytes_per_sample(format2) > 2)) { 151 return true; 152 } 153 return format1 == format2; 154 } 155
