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 // For mixed output and inputs, the policy will use max mixer sampling rates.
22 // Do not limit sampling rate otherwise
23 #define MAX_MIXER_SAMPLING_RATE 192000
24 
25 // For mixed output and inputs, the policy will use max mixer channel count.
26 // Do not limit channel count otherwise
27 #define MAX_MIXER_CHANNEL_COUNT 8
28 
29 /**
30  * A device mask for all audio input devices that are considered "virtual" when evaluating
31  * active inputs in getActiveInput()
32  */
33 #define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL  (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_FM_TUNER)
34 
35 
36 /**
37  * A device mask for all audio input and output devices where matching inputs/outputs on device
38  * type alone is not enough: the address must match too
39  */
40 #define APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL (AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
41 
42 #define APM_AUDIO_DEVICE_IN_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX)
43 
44 /**
45  * Check if the state given correspond to an in call state.
46  * @TODO find a better name for widely call state
47  *
48  * @param[in] state to consider
49  *
50  * @return true if given state represents a device in a telephony or VoIP call
51  */
is_state_in_call(int state)52 static inline bool is_state_in_call(int state)
53 {
54     return (state == AUDIO_MODE_IN_CALL) || (state == AUDIO_MODE_IN_COMMUNICATION);
55 }
56 
57 /**
58  * Check if the input device given is considered as a virtual device.
59  *
60  * @param[in] device to consider
61  *
62  * @return true if the device is a virtual one, false otherwise.
63  */
is_virtual_input_device(audio_devices_t device)64 static inline bool is_virtual_input_device(audio_devices_t device)
65 {
66     if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
67         device &= ~AUDIO_DEVICE_BIT_IN;
68         if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
69             return true;
70     }
71     return false;
72 }
73 
74 /**
75  * Check whether the device type is one
76  * where addresses are used to distinguish between one connected device and another
77  *
78  * @param[in] device to consider
79  *
80  * @return true if the device needs distinguish on address, false otherwise..
81  */
device_distinguishes_on_address(audio_devices_t device)82 static inline bool device_distinguishes_on_address(audio_devices_t device)
83 {
84     return (((device & AUDIO_DEVICE_BIT_IN) != 0) &&
85             ((~AUDIO_DEVICE_BIT_IN & device & APM_AUDIO_DEVICE_IN_MATCH_ADDRESS_ALL) != 0)) ||
86            (((device & AUDIO_DEVICE_BIT_IN) == 0) &&
87             ((device & APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL) != 0));
88 }
89