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 getActiveInput()
37 */
38 #define APM_AUDIO_IN_DEVICE_VIRTUAL_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_FM_TUNER)
39
40
41 /**
42 * A device mask for all audio input and output devices where matching inputs/outputs on device
43 * type alone is not enough: the address must match too
44 */
45 #define APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL (AUDIO_DEVICE_OUT_REMOTE_SUBMIX|AUDIO_DEVICE_OUT_BUS)
46
47 #define APM_AUDIO_DEVICE_IN_MATCH_ADDRESS_ALL (AUDIO_DEVICE_IN_REMOTE_SUBMIX|AUDIO_DEVICE_IN_BUS)
48
49 /**
50 * Stub audio output device. Used in policy configuration file on platforms without audio outputs.
51 * This alias value to AUDIO_DEVICE_OUT_DEFAULT is only used in the audio policy context.
52 */
53 #define AUDIO_DEVICE_OUT_STUB AUDIO_DEVICE_OUT_DEFAULT
54 /**
55 * Stub audio input device. Used in policy configuration file on platforms without audio inputs.
56 * This alias value to AUDIO_DEVICE_IN_DEFAULT is only used in the audio policy context.
57 */
58 #define AUDIO_DEVICE_IN_STUB AUDIO_DEVICE_IN_DEFAULT
59 /**
60 * Alias to AUDIO_DEVICE_OUT_DEFAULT defined for clarification when this value is used by volume
61 * control APIs (e.g setStreamVolumeIndex().
62 */
63 #define AUDIO_DEVICE_OUT_DEFAULT_FOR_VOLUME AUDIO_DEVICE_OUT_DEFAULT
64
65
66 /**
67 * Check if the state given correspond to an in call state.
68 * @TODO find a better name for widely call state
69 *
70 * @param[in] state to consider
71 *
72 * @return true if given state represents a device in a telephony or VoIP call
73 */
is_state_in_call(int state)74 static inline bool is_state_in_call(int state)
75 {
76 return (state == AUDIO_MODE_IN_CALL) || (state == AUDIO_MODE_IN_COMMUNICATION);
77 }
78
79 /**
80 * Check if the input device given is considered as a virtual device.
81 *
82 * @param[in] device to consider
83 *
84 * @return true if the device is a virtual one, false otherwise.
85 */
is_virtual_input_device(audio_devices_t device)86 static inline bool is_virtual_input_device(audio_devices_t device)
87 {
88 if ((device & AUDIO_DEVICE_BIT_IN) != 0) {
89 device &= ~AUDIO_DEVICE_BIT_IN;
90 if ((popcount(device) == 1) && ((device & ~APM_AUDIO_IN_DEVICE_VIRTUAL_ALL) == 0))
91 return true;
92 }
93 return false;
94 }
95
96 /**
97 * Check whether the device type is one
98 * where addresses are used to distinguish between one connected device and another
99 *
100 * @param[in] device to consider
101 *
102 * @return true if the device needs distinguish on address, false otherwise..
103 */
device_distinguishes_on_address(audio_devices_t device)104 static inline bool device_distinguishes_on_address(audio_devices_t device)
105 {
106 return (((device & AUDIO_DEVICE_BIT_IN) != 0) &&
107 ((~AUDIO_DEVICE_BIT_IN & device & APM_AUDIO_DEVICE_IN_MATCH_ADDRESS_ALL) != 0)) ||
108 (((device & AUDIO_DEVICE_BIT_IN) == 0) &&
109 ((device & APM_AUDIO_DEVICE_OUT_MATCH_ADDRESS_ALL) != 0));
110 }
111
112 /* Indicates if audio formats are equivalent when considering a match between
113 * audio HAL supported formats and client requested formats
114 */
audio_formats_match(audio_format_t format1,audio_format_t format2)115 static inline bool audio_formats_match(audio_format_t format1,
116 audio_format_t format2)
117 {
118 if (audio_is_linear_pcm(format1) &&
119 (audio_bytes_per_sample(format1) > 2) &&
120 audio_is_linear_pcm(format2) &&
121 (audio_bytes_per_sample(format2) > 2)) {
122 return true;
123 }
124 return format1 == format2;
125 }
126