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 */
is_state_in_call(int state)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 */
is_virtual_input_device(audio_devices_t device)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 */
device_distinguishes_on_address(audio_devices_t device)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 */
source_priority(audio_source_t inputSource)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 */
audio_formats_match(audio_format_t format1,audio_format_t format2)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