1 /*
2 * Copyright (C) 2014 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 #ifndef AUDIO_POLICY_HELPER_H_
17 #define AUDIO_POLICY_HELPER_H_
18
19 #include <system/audio.h>
20
audio_attributes_to_stream_type(const audio_attributes_t * attr)21 static audio_stream_type_t audio_attributes_to_stream_type(const audio_attributes_t *attr)
22 {
23 // flags to stream type mapping
24 if ((attr->flags & AUDIO_FLAG_AUDIBILITY_ENFORCED) == AUDIO_FLAG_AUDIBILITY_ENFORCED) {
25 return AUDIO_STREAM_ENFORCED_AUDIBLE;
26 }
27 if ((attr->flags & AUDIO_FLAG_SCO) == AUDIO_FLAG_SCO) {
28 return AUDIO_STREAM_BLUETOOTH_SCO;
29 }
30
31 // usage to stream type mapping
32 switch (attr->usage) {
33 case AUDIO_USAGE_MEDIA:
34 case AUDIO_USAGE_GAME:
35 case AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY:
36 case AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE:
37 return AUDIO_STREAM_MUSIC;
38 case AUDIO_USAGE_ASSISTANCE_SONIFICATION:
39 return AUDIO_STREAM_SYSTEM;
40 case AUDIO_USAGE_VOICE_COMMUNICATION:
41 return AUDIO_STREAM_VOICE_CALL;
42
43 case AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING:
44 return AUDIO_STREAM_DTMF;
45
46 case AUDIO_USAGE_ALARM:
47 return AUDIO_STREAM_ALARM;
48 case AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE:
49 return AUDIO_STREAM_RING;
50
51 case AUDIO_USAGE_NOTIFICATION:
52 case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST:
53 case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT:
54 case AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED:
55 case AUDIO_USAGE_NOTIFICATION_EVENT:
56 return AUDIO_STREAM_NOTIFICATION;
57
58 case AUDIO_USAGE_UNKNOWN:
59 default:
60 return AUDIO_STREAM_MUSIC;
61 }
62 }
63
stream_type_to_audio_attributes(audio_stream_type_t streamType,audio_attributes_t * attr)64 static void stream_type_to_audio_attributes(audio_stream_type_t streamType,
65 audio_attributes_t *attr) {
66 memset(attr, 0, sizeof(audio_attributes_t));
67
68 switch (streamType) {
69 case AUDIO_STREAM_DEFAULT:
70 case AUDIO_STREAM_MUSIC:
71 attr->content_type = AUDIO_CONTENT_TYPE_MUSIC;
72 attr->usage = AUDIO_USAGE_MEDIA;
73 break;
74 case AUDIO_STREAM_VOICE_CALL:
75 attr->content_type = AUDIO_CONTENT_TYPE_SPEECH;
76 attr->usage = AUDIO_USAGE_VOICE_COMMUNICATION;
77 break;
78 case AUDIO_STREAM_ENFORCED_AUDIBLE:
79 attr->flags |= AUDIO_FLAG_AUDIBILITY_ENFORCED;
80 // intended fall through, attributes in common with STREAM_SYSTEM
81 case AUDIO_STREAM_SYSTEM:
82 attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
83 attr->usage = AUDIO_USAGE_ASSISTANCE_SONIFICATION;
84 break;
85 case AUDIO_STREAM_RING:
86 attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
87 attr->usage = AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE;
88 break;
89 case AUDIO_STREAM_ALARM:
90 attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
91 attr->usage = AUDIO_USAGE_ALARM;
92 break;
93 case AUDIO_STREAM_NOTIFICATION:
94 attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
95 attr->usage = AUDIO_USAGE_NOTIFICATION;
96 break;
97 case AUDIO_STREAM_BLUETOOTH_SCO:
98 attr->content_type = AUDIO_CONTENT_TYPE_SPEECH;
99 attr->usage = AUDIO_USAGE_VOICE_COMMUNICATION;
100 attr->flags |= AUDIO_FLAG_SCO;
101 break;
102 case AUDIO_STREAM_DTMF:
103 attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
104 attr->usage = AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING;
105 break;
106 case AUDIO_STREAM_TTS:
107 attr->content_type = AUDIO_CONTENT_TYPE_SPEECH;
108 attr->usage = AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY;
109 break;
110 default:
111 ALOGE("invalid stream type %d when converting to attributes", streamType);
112 }
113 }
114
115 #endif //AUDIO_POLICY_HELPER_H_
116