开篇先贴上一个高通的例子，后续基于此文件做具体分析。
XML
1 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
2 <!-- Copyright (c) 2016-2019, The Linux Foundation. All rights reserved
3 Not a Contribution.
4 -->
5 <!-- Copyright (C) 2015 The Android Open Source Project
6
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
10
11 http://www.apache.org/licenses/LICENSE-2.0
12
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18 -->
19
20 <audioPolicyConfiguration version="1.0" xmlns:xi="http://www.w3.org/2001/XInclude">
21 <!-- version section contains a "version" tag in the form "major.minor" e.g version="1.0" -->
22
23 <!-- Global configuration Decalaration -->
24 <globalConfiguration speaker_drc_enabled="true"/>
25
26 <!-- Modules section:
27 There is one section per audio HW module present on the platform.
28 Each module section will contains two mandatory tags for audio HAL "halVersion" and "name".
29 The module names are the same as in current .conf file:
30 "primary", "A2DP", "remote_submix", "USB"
31 Each module will contain the following sections:
32 "devicePorts": a list of device descriptors for all input and output devices accessible via this
33 module.
34 This contains both permanently attached devices and removable devices.
35 "gain": constraints applied to the millibel values:
36 - maxValueMB >= minValueMB
37 - defaultValueMB >= minValueMB && defaultValueMB <= maxValueMB
38 - (maxValueMB - minValueMB) % stepValueMB == 0
39 - (defaultValueMB - minValueMB) % stepValueMB == 0
40 "mixPorts": listing all output and input streams exposed by the audio HAL
41 "routes": list of possible connections between input and output devices or between stream and
42 devices.
43 "route": is defined by an attribute:
44 -"type": <mux|mix> means all sources are mutual exclusive (mux) or can be mixed (mix)
45 -"sink": the sink involved in this route
46 -"sources": all the sources than can be connected to the sink via vis route
47 "attachedDevices": permanently attached devices.
48 The attachedDevices section is a list of devices names. The names correspond to device names
49 defined in <devicePorts> section.
50 "defaultOutputDevice": device to be used by default when no policy rule applies
51 -->
52 <modules>
53 <!-- Primary Audio HAL -->
54 <module name="primary" halVersion="3.0">
55 <attachedDevices>
56 <item>Media Bus</item>
57 <item>Sys Notification Bus</item>
58 <item>Nav Guidance Bus</item>
59 <item>Phone Bus</item>
60 <item>Tts Bus</item>
61 <item>Vr Tts Bus</item>
62 <item>Boot Music Bus</item>
63 <item>Chime Tts Bus</item>
64 <item>BT Codriver Bus</item>
65 <item>Projection Vr Tts Bus</item>
66 <item>Ringtone Bus</item>
67 <item>Built-In Mic</item>
68 <item>Built-In Back Mic</item>
69 <item>FM Tuner</item>
70 <item>Speaker</item>
71 <item>Projection Vr Bus In</item>
72 <item>Projection Phone Bus In</item>
73 <item>Local Vr Bus In</item>
74 <item>Projection Esiri Bus In</item>
75 </attachedDevices>
76 <defaultOutputDevice>Media Bus</defaultOutputDevice>
77 <mixPorts>
78 <mixPort name="media" role="source"
79 flags="AUDIO_OUTPUT_FLAG_PRIMARY">
80 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
81 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
82 </mixPort>
83 <mixPort name="sys_notification" role="source">
84 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
85 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
86 </mixPort>
87 <mixPort name="nav_guidance" role="source">
88 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
89 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
90 </mixPort>
91 <mixPort name="phone" role="source">
92 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
93 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
94 </mixPort>
95 <mixPort name="tts" role="source">
96 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
97 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
98 </mixPort>
99 <mixPort name="vr_tts" role="source">
100 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
101 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
102 </mixPort>
103 <mixPort name="boot_music" role="source">
104 <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
105 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
106 </mixPort>
107 <mixPort name="chime_tts" role="source">
108 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
109 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
110 </mixPort>
111 <mixPort name="bt_codriver" role="source"
112 flags="AUDIO_OUTPUT_FLAG_RIGHT_ZONE">
113 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
114 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
115 </mixPort>
116 <mixPort name="primary output" role="source" flags="AUDIO_OUTPUT_FLAG_FAST|AUDIO_OUTPUT_FLAG_PRIMARY">
117 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
118 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
119 </mixPort>
120 <mixPort name="raw" role="source"
121 flags="AUDIO_OUTPUT_FLAG_FAST|AUDIO_OUTPUT_FLAG_RAW">
122 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
123 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
124 </mixPort>
125 <mixPort name="deep_buffer" role="source"
126 flags="AUDIO_OUTPUT_FLAG_DEEP_BUFFER">
127 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
128 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
129 </mixPort>
130 <mixPort name="mmap_no_irq_out" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_MMAP_NOIRQ">
131 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
132 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
133 </mixPort>
134 <mixPort name="hifi_playback" role="source" />
135 <mixPort name="compress_passthrough" role="source"
136 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD|AUDIO_OUTPUT_FLAG_NON_BLOCKING">
137 <profile name="" format="dynamic"
138 samplingRates="dynamic" channelMasks="dynamic"/>
139 </mixPort>
140 <mixPort name="direct_pcm" role="source"
141 flags="AUDIO_OUTPUT_FLAG_DIRECT">
142 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
143 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
144 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
145 <profile name="" format="AUDIO_FORMAT_PCM_8_24_BIT"
146 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000,352800,384000"
147 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
148 <profile name="" format="AUDIO_FORMAT_PCM_24_BIT_PACKED"
149 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000,352800,384000"
150 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
151 <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
152 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000,352800,384000"
153 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
154 </mixPort>
155
156 <mixPort name="bt_codriver_direct_pcm" role="source"
157 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_RIGHT_ZONE">
158 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
159 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
160 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
161 <profile name="" format="AUDIO_FORMAT_PCM_8_24_BIT"
162 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000,352800,384000"
163 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
164 <profile name="" format="AUDIO_FORMAT_PCM_24_BIT_PACKED"
165 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000,352800,384000"
166 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
167 <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
168 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000,352800,384000"
169 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
170 </mixPort>
171 <mixPort name="compressed_offload" role="source"
172 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD|AUDIO_OUTPUT_FLAG_NON_BLOCKING">
173 <profile name="" format="AUDIO_FORMAT_MP3"
174 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
175 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
176 <profile name="" format="AUDIO_FORMAT_FLAC"
177 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
178 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
179 <profile name="" format="AUDIO_FORMAT_ALAC"
180 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
181 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
182 <profile name="" format="AUDIO_FORMAT_APE"
183 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
184 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
185 <profile name="" format="AUDIO_FORMAT_AAC_LC"
186 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
187 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
188 <profile name="" format="AUDIO_FORMAT_AAC_HE_V1"
189 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
190 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
191 <profile name="" format="AUDIO_FORMAT_AAC_HE_V2"
192 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
193 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
194 <profile name="" format="AUDIO_FORMAT_DTS"
195 samplingRates="32000,44100,48000"
196 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1"/>
197 <profile name="" format="AUDIO_FORMAT_DTS_HD"
198 samplingRates="32000,44100,48000,64000,88200,96000,128000,176400,192000"
199 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
200 <profile name="" format="AUDIO_FORMAT_WMA"
201 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
202 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
203 <profile name="" format="AUDIO_FORMAT_WMA_PRO"
204 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
205 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
206 <profile name="" format="AUDIO_FORMAT_VORBIS"
207 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
208 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
209 <profile name="" format="AUDIO_FORMAT_AAC_ADTS_LC"
210 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
211 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
212 <profile name="" format="AUDIO_FORMAT_AAC_ADTS_HE_V1"
213 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
214 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
215 <profile name="" format="AUDIO_FORMAT_AAC_ADTS_HE_V2"
216 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
217 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
218 </mixPort>
219
220 <mixPort name="bt_codriver_offload" role="source"
221 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD|AUDIO_OUTPUT_FLAG_NON_BLOCKING|AUDIO_OUTPUT_FLAG_RIGHT_ZONE">
222 <profile name="" format="AUDIO_FORMAT_MP3"
223 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
224 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
225 <profile name="" format="AUDIO_FORMAT_FLAC"
226 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
227 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
228 <profile name="" format="AUDIO_FORMAT_ALAC"
229 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
230 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
231 <profile name="" format="AUDIO_FORMAT_APE"
232 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
233 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
234 <profile name="" format="AUDIO_FORMAT_AAC_LC"
235 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
236 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
237 <profile name="" format="AUDIO_FORMAT_AAC_HE_V1"
238 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
239 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
240 <profile name="" format="AUDIO_FORMAT_AAC_HE_V2"
241 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
242 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
243 <profile name="" format="AUDIO_FORMAT_DTS"
244 samplingRates="32000,44100,48000"
245 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1"/>
246 <profile name="" format="AUDIO_FORMAT_DTS_HD"
247 samplingRates="32000,44100,48000,64000,88200,96000,128000,176400,192000"
248 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
249 <profile name="" format="AUDIO_FORMAT_WMA"
250 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
251 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
252 <profile name="" format="AUDIO_FORMAT_WMA_PRO"
253 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
254 channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_2POINT1,AUDIO_CHANNEL_OUT_QUAD,AUDIO_CHANNEL_OUT_PENTA,AUDIO_CHANNEL_OUT_5POINT1,AUDIO_CHANNEL_OUT_6POINT1,AUDIO_CHANNEL_OUT_7POINT1"/>
255 <profile name="" format="AUDIO_FORMAT_VORBIS"
256 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000,128000,176400,192000"
257 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
258 <profile name="" format="AUDIO_FORMAT_AAC_ADTS_LC"
259 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
260 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
261 <profile name="" format="AUDIO_FORMAT_AAC_ADTS_HE_V1"
262 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
263 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
264 <profile name="" format="AUDIO_FORMAT_AAC_ADTS_HE_V2"
265 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,64000,88200,96000"
266 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
267 </mixPort>
268 <mixPort name="dsd_compress_passthrough" role="source"
269 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD|AUDIO_OUTPUT_FLAG_NON_BLOCKING">
270 <profile name="" format="AUDIO_FORMAT_DSD"
271 samplingRates="2822400,5644800"
272 channelMasks="AUDIO_CHANNEL_OUT_STEREO,AUDIO_CHANNEL_OUT_MONO"/>
273 </mixPort>
274 <mixPort name="voice_tx" role="source">
275 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
276 samplingRates="8000,16000,48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
277 </mixPort>
278 <mixPort name="voip_rx" role="source"
279 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_VOIP_RX">
280 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
281 samplingRates="8000,16000,32000,48000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
282 </mixPort>
283 <mixPort name="projection_vr_downlink" role="source">
284 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
285 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
286 </mixPort>
287 <mixPort name="projection_phone_downlink" role="source"
288 flags="AUDIO_OUTPUT_FLAG_DIRECT|AUDIO_OUTPUT_FLAG_DIRECT_PROJECTION">
289 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
290 samplingRates="8000,16000,24000,32000,48000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
291 </mixPort>
292 <mixPort name="ringtone" role="source">
293 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
294 samplingRates="16000,44100,48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
295 </mixPort>
296
297 <mixPort name="primary input" role="sink" maxOpenCount="2" maxActiveCount="2">
298 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
299 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
300 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_6,AUDIO_CHANNEL_INDEX_MASK_7"/>
301 </mixPort>
302 <mixPort name="surround_sound" role="sink">
303 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
304 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
305 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_3,AUDIO_CHANNEL_INDEX_MASK_4,AUDIO_CHANNEL_IN_5POINT1,AUDIO_CHANNEL_INDEX_MASK_6"/>
306 </mixPort>
307 <mixPort name="record_24" role="sink">
308 <profile name="" format="AUDIO_FORMAT_PCM_24_BIT_PACKED"
309 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,96000,192000"
310 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_3,AUDIO_CHANNEL_INDEX_MASK_4"/>
311 <profile name="" format="AUDIO_FORMAT_PCM_8_24_BIT"
312 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000,96000,192000"
313 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_3,AUDIO_CHANNEL_INDEX_MASK_4"/>
314 </mixPort>
315 <mixPort name="voice_rx" role="sink">
316 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
317 samplingRates="8000,16000,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
318 </mixPort>
319 <mixPort name="mmap_no_irq_in" role="sink" flags="AUDIO_INPUT_FLAG_MMAP_NOIRQ">
320 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
321 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
322 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_3"/>
323 </mixPort>
324 <mixPort name="projection_vr_uplink" role="sink" flags="AUDIO_INPUT_FLAG_PROJECTION_VR">
325 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
326 samplingRates="8000,16000,24000"
327 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
328 </mixPort>
329 <mixPort name="projection_phone_uplink" role="sink" flags="AUDIO_INPUT_FLAG_PROJECTION_PHONE">
330 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
331 samplingRates="8000,16000,24000,32000,48000"
332 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
333 </mixPort>
334 <mixPort name="local_vr_uplink" role="sink" flags="AUDIO_INPUT_FLAG_LOCAL_VR">
335 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
336 samplingRates="16000"
337 channelMasks="AUDIO_CHANNEL_INDEX_MASK_4,AUDIO_CHANNEL_INDEX_MASK_7"/>
338 </mixPort>
339 <mixPort name="projection_esiri_uplink" role="sink">
340 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
341 samplingRates="16000"
342 channelMasks="AUDIO_CHANNEL_INDEX_MASK_7,AUDIO_CHANNEL_INDEX_MASK_8"/>
343 </mixPort>
344 </mixPorts>
345
346 <devicePorts>
347 <!-- Output devices declaration, i.e. Sink DEVICE PORT -->
348 <devicePort tagName="Media Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
349 address="BUS00_MEDIA">
350 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
351 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
352 <gains>
353 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
354 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
355 </gains>
356 </devicePort>
357 <devicePort tagName="Sys Notification Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
358 address="BUS01_SYS_NOTIFICATION">
359 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
360 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
361 <gains>
362 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
363 minValueMB="-7800" maxValueMB="-4800" defaultValueMB="-4800" stepValueMB="3000"/>
364 </gains>
365 </devicePort>
366 <devicePort tagName="Nav Guidance Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
367 address="BUS02_NAV_GUIDANCE">
368 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
369 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
370 <gains>
371 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
372 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
373 </gains>
374 </devicePort>
375 <devicePort tagName="Phone Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
376 address="BUS03_PHONE">
377 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
378 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
379 <gains>
380 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
381 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
382 </gains>
383 </devicePort>
384 <devicePort tagName="Tts Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
385 address="BUS04_TTS">
386 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
387 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
388 <gains>
389 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
390 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
391 </gains>
392 </devicePort>
393 <devicePort tagName="Vr Tts Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
394 address="BUS05_VR_TTS">
395 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
396 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
397 <gains>
398 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
399 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
400 </gains>
401 </devicePort>
402 <devicePort tagName="Boot Music Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
403 address="BUS07_BOOT_MUSIC">
404 <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
405 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
406 <gains>
407 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
408 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
409 </gains>
410 </devicePort>
411 <devicePort tagName="Chime Tts Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
412 address="BUS08_CHIME_TTS">
413 <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
414 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
415 <gains>
416 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
417 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
418 </gains>
419 </devicePort>
420 <devicePort tagName="BT Codriver Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
421 address="BUS09_BT_CODRIVER">
422 <profile name="" format="AUDIO_FORMAT_PCM_32_BIT"
423 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
424 <gains>
425 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
426 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
427 </gains>
428 </devicePort>
429 <devicePort tagName="Projection Vr Tts Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
430 address="BUS11_PROJECTION_VR_TTS">
431 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
432 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
433 <gains>
434 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
435 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
436 </gains>
437 </devicePort>
438 <devicePort tagName="Ringtone Bus" role="sink" type="AUDIO_DEVICE_OUT_BUS"
439 address="BUS12_RINGTONE">
440 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
441 samplingRates="16000,48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
442 <gains>
443 <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
444 minValueMB="-7800" maxValueMB="0" defaultValueMB="-5800" stepValueMB="200"/>
445 </gains>
446 </devicePort>
447 <devicePort tagName="Earpiece" type="AUDIO_DEVICE_OUT_EARPIECE" role="sink">
448 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
449 samplingRates="48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
450 </devicePort>
451 <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER" address="">
452 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
453 samplingRates="8000,16000,24000,32000,48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
454 </devicePort>
455 <devicePort tagName="Wired Headset" type="AUDIO_DEVICE_OUT_WIRED_HEADSET" role="sink">
456 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
457 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
458 </devicePort>
459 <devicePort tagName="Wired Headphones" type="AUDIO_DEVICE_OUT_WIRED_HEADPHONE" role="sink">
460 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
461 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
462 </devicePort>
463 <devicePort tagName="Line" type="AUDIO_DEVICE_OUT_LINE" role="sink">
464 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
465 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
466 </devicePort>
467 <devicePort tagName="BT SCO" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO" role="sink">
468 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
469 samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
470 </devicePort>
471 <devicePort tagName="BT SCO Headset" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET" role="sink">
472 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
473 samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
474 </devicePort>
475 <devicePort tagName="BT SCO Car Kit" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT" role="sink">
476 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
477 samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
478 </devicePort>
479 <devicePort tagName="BT SCO All" type="AUDIO_DEVICE_OUT_ALL_SCO" role="sink">
480 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
481 samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
482 </devicePort>
483 <devicePort tagName="Telephony Tx" type="AUDIO_DEVICE_OUT_TELEPHONY_TX" role="sink">
484 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
485 samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
486 </devicePort>
487 <devicePort tagName="HDMI" type="AUDIO_DEVICE_OUT_AUX_DIGITAL" role="sink">
488 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
489 samplingRates="8000,11025,16000,22050,32000,44100,48000,64000,88200,96000,128000,176400,192000" channelMasks="dynamic"/>
490 </devicePort>
491 <devicePort tagName="Proxy" type="AUDIO_DEVICE_OUT_PROXY" role="sink">
492 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
493 samplingRates="8000,11025,16000,22050,32000,44100,48000,64000,88200,96000,128000,176400,192000" channelMasks="dynamic"/>
494 </devicePort>
495 <devicePort tagName="FM" type="AUDIO_DEVICE_OUT_FM" role="sink">
496 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
497 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO,AUDIO_CHANNEL_OUT_STEREO"/>
498 </devicePort>
499 <devicePort tagName="BT A2DP Out" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP" role="sink">
500 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
501 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
502 </devicePort>
503 <devicePort tagName="BT A2DP Headphones" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES" role="sink">
504 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
505 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
506 </devicePort>
507 <devicePort tagName="BT A2DP Speaker" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER" role="sink">
508 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
509 samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
510 </devicePort>
511
512 <!-- Input devices declaration, i.e. Source DEVICE PORT -->
513 <devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source">
514 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
515 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
516 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_6,AUDIO_CHANNEL_INDEX_MASK_7"/>
517 </devicePort>
518 <devicePort tagName="Built-In Back Mic" type="AUDIO_DEVICE_IN_BACK_MIC" role="source">
519 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
520 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
521 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK,AUDIO_CHANNEL_INDEX_MASK_6,AUDIO_CHANNEL_INDEX_MASK_7"/>
522 </devicePort>
523 <devicePort tagName="FM Tuner" type="AUDIO_DEVICE_IN_FM_TUNER" role="source" address="tuner0">
524 <gains>
525 <gain name="gain_2" mode="AUDIO_GAIN_MODE_JOINT"
526 minValueMB="0"
527 maxValueMB="480"
528 defaultValueMB="240"
529 stepValueMB="16"/>
530 </gains>
531 </devicePort>
532 <devicePort tagName="Wired Headset Mic" type="AUDIO_DEVICE_IN_WIRED_HEADSET" role="source">
533 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
534 samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
535 channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
536 </devicePort>
537 <devicePort tagName="BT SCO Headset Mic" type="AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET" role="source">
538 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
539 samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
540 </devicePort>
541 <devicePort tagName="Telephony Rx" type="AUDIO_DEVICE_IN_TELEPHONY_RX" role="source">
542 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
543 samplingRates="8000,16000,48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
544 </devicePort>
545 <devicePort tagName="Projection Vr Bus In" type="AUDIO_DEVICE_IN_BUS" role="source"
546 address="BUS01_PROJECTION_VR_BUS_IN">
547 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
548 samplingRates="16000,24000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
549 </devicePort>
550 <devicePort tagName="Projection Phone Bus In" type="AUDIO_DEVICE_IN_BUS" role="source"
551 address="BUS02_PROJECTION_PHONE_BUS_IN">
552 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
553 samplingRates="8000,16000,24000,32000,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
554 </devicePort>
555 <devicePort tagName="Local Vr Bus In" type="AUDIO_DEVICE_IN_BUS" role="source"
556 address="BUS03_LOCAL_VR_BUS_IN">
557 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
558 samplingRates="16000" channelMasks="AUDIO_CHANNEL_INDEX_MASK_4,AUDIO_CHANNEL_INDEX_MASK_7"/>
559 </devicePort>
560 <devicePort tagName="Projection Esiri Bus In" type="AUDIO_DEVICE_IN_BUS" role="source"
561 address="BUS05_PROJECTION_ESIRI_BUS_IN">
562 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
563 samplingRates="16000" channelMasks="AUDIO_CHANNEL_INDEX_MASK_7,AUDIO_CHANNEL_INDEX_MASK_8"/>
564 </devicePort>
565 </devicePorts>
566 <!-- route declaration, i.e. list all available sources for a given sink -->
567 <routes>
568 <route type="mix" sink="Media Bus"
569 sources="media,direct_pcm,compressed_offload,voip_rx,mmap_no_irq_out"/>
570 <route type="mix" sink="Sys Notification Bus"
571 sources="sys_notification"/>
572 <route type="mix" sink="Nav Guidance Bus"
573 sources="nav_guidance"/>
574 <route type="mix" sink="Phone Bus"
575 sources="phone"/>
576 <route type="mix" sink="Tts Bus"
577 sources="tts"/>
578 <route type="mix" sink="Vr Tts Bus"
579 sources="vr_tts"/>
580 <route type="mix" sink="Boot Music Bus"
581 sources="boot_music"/>
582 <route type="mix" sink="Chime Tts Bus"
583 sources="chime_tts"/>
584 <route type="mix" sink="BT Codriver Bus"
585 sources="bt_codriver,bt_codriver_offload,bt_codriver_direct_pcm"/>
586 <route type="mix" sink="Projection Vr Tts Bus"
587 sources="projection_vr_downlink"/>
588 <route type="mix" sink="Ringtone Bus"
589 sources="ringtone"/>
590 <route type="mix" sink="Earpiece"
591 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,voip_rx,mmap_no_irq_out"/>
592 <route type="mix" sink="Speaker"
593 sources="primary output,direct_pcm,compressed_offload,voip_rx,mmap_no_irq_out,projection_phone_downlink"/>
594 <route type="mix" sink="Wired Headset"
595 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,dsd_compress_passthrough,voip_rx,mmap_no_irq_out"/>
596 <route type="mix" sink="Wired Headphones"
597 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,dsd_compress_passthrough,voip_rx,mmap_no_irq_out"/>
598 <route type="mix" sink="Line"
599 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,dsd_compress_passthrough,voip_rx,mmap_no_irq_out"/>
600 <route type="mix" sink="HDMI"
601 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,compress_passthrough,voip_rx"/>
602 <route type="mix" sink="Proxy"
603 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload"/>
604 <route type="mix" sink="FM"
605 sources="primary output"/>
606 <route type="mix" sink="BT SCO All"
607 sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,voip_rx"/>
608 <route type="mix" sink="Telephony Tx"
609 sources="voice_tx"/>
610 <route type="mix" sink="voice_rx"
611 sources="Telephony Rx"/>
612 <route type="mix" sink="primary input"
613 sources="Built-In Mic,Built-In Back Mic,Wired Headset Mic,BT SCO Headset Mic,FM Tuner,Telephony Rx"/>
614 <route type="mix" sink="surround_sound"
615 sources="Built-In Mic,Built-In Back Mic"/>
616 <route type="mix" sink="record_24"
617 sources="Built-In Mic,Built-In Back Mic,Wired Headset Mic"/>
618 <route type="mix" sink="mmap_no_irq_in"
619 sources="Built-In Mic,Built-In Back Mic,Wired Headset Mic"/>
620 <route type="mix" sink="BT A2DP Out"
621 sources="primary output,deep_buffer,direct_pcm,compressed_offload,voip_rx"/>
622 <route type="mix" sink="BT A2DP Headphones"
623 sources="primary output,deep_buffer,direct_pcm,compressed_offload,voip_rx"/>
624 <route type="mix" sink="BT A2DP Speaker"
625 sources="primary output,deep_buffer,direct_pcm,compressed_offload,voip_rx"/>
626 <route type="mix" sink="projection_vr_uplink"
627 sources="Projection Vr Bus In"/>
628 <route type="mix" sink="projection_phone_uplink"
629 sources="Projection Phone Bus In"/>
630 <route type="mix" sink="local_vr_uplink"
631 sources="Local Vr Bus In"/>
632 <route type="mix" sink="projection_esiri_uplink"
633 sources="Projection Esiri Bus In"/>
634 </routes>
635
636 </module>
637
638 <!-- A2DP Audio HAL -->
639 <module name="a2dp" halVersion="2.0">
640 <mixPorts>
641 <mixPort name="a2dp input" role="sink">
642 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
643 samplingRates="44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
644 </mixPort>
645 </mixPorts>
646
647 <devicePorts>
648 <devicePort tagName="BT A2DP In" type="AUDIO_DEVICE_IN_BLUETOOTH_A2DP" role="source">
649 <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
650 samplingRates="44100,48000" channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO"/>
651 </devicePort>
652 </devicePorts>
653
654 <routes>
655 <route type="mix" sink="a2dp input"
656 sources="BT A2DP In"/>
657 </routes>
658 </module>概括来说，这个文件定义了系统会使用到的音频设备，支持的音频流，以及设备与流之间的走向关系。devicePort对应设备，mixPort对应流，routes对应走向关系。
module:
module对应不同的hal实现，从文件中我们看到有primary，a2dp，两个module，
需要注意的是AudioFlinger中通过hal接口IDevicesFactory.openDevice(string device) 打开的就是这个module，而不是一个真实的扬声器或者耳机之类的设备。
每个module都会有一个audio_hal的实现，通常会命名为audio_hw.c，代码路径如下：
android/vendor/qcom/opensource/audio-hal/primary-hal/hal/
android/system/bt/audio_a2dp_hw/
对应到设备端，会看到有两个库，分别是：
attachedDevices:
永久连接的设备，是devicePort中的一部分。
defaultOutputDevice：
当无策略规则适用时默认会使用这个设备
mixPort:
每一个mixPort都对应一个音频输入或者输出流。
其中role有两个角色，source代表此流可以用于输出，如输出到扬声器。sink代表此流可以用于接受输入，如麦克风采集到数据后输出到此流。
flag和profile用于指定此流支持的一些属性配置。
devicePort:
对应一个真实设备。可以是永久连接的设备，也可以是动态插拔的外设。同样role有source和sink两个角色。profile于指定此流支持的一些属性配置。
type用于设备的唯一标识。
routes：
用于连接设备和流，列出所有可能的连接。
type：表示所有音源相互排斥（mux）或可以混合（mix）。
sink: 可以是设备，也可以是流。每一个route只有一个sink。
source: 同样可以是设备，也可以是流。每一个route中可包含多个source。
XML
<route type="mix" sink="Earpiece" sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,voip_rx,mmap_no_irq_out"/>
<route type="mix" sink="primary input" sources="Built-In Mic,Built-In Back Mic,Wired Headset Mic,BT SCO Headset Mic,FM Tuner,Telephony Rx"/>
<route type="mix" sink="Speaker" sources="primary output,direct_pcm,compressed_offload,voip_rx,mmap_no_irq_out,projection_phone_downlink"/>
<route type="mix" sink="Wired Headset" sources="primary output,raw,deep_buffer,direct_pcm,compressed_offload,dsd_compress_passthrough,voip_rx,mmap_no_irq_out"/>以上配置可以解释为：
1.假定音频流要输出到耳机或扬声器，那么可以采用的音频流(mixPort)可以是primary output, raw 等等。
2.假定音频流要输出到primary input。那么可以使用的设备有 Built-In Mic,Built-In Back Mic等麦克风。
从配置文件中可以看到不同的sink，可能有相同的source。那么具体采用那个source会根据音频策略来决定。比如：
-
从上层传来了一个compressed_offload的流，到底是输出到耳机还是内置扬声器，会根据是否插入耳机和耳机的优先级来判定。
-
上层传来请求录音请求，不管是普通录音，还是voip语音电话录音，会从可用的录音设备中查找优先级最高的一个设备进行录音。
audio_policy_configuration初始化逻辑：
audio_policy_configuration.xml在AudioPolicyManager初始化时会被解析。
首先遍历module，再分别遍历输出mixport和输入mixport。如果mixport找到的设备出现在attachedDevices中才会打开此流。
cpp
4866 void AudioPolicyManager::onNewAudioModulesAvailableInt(DeviceVector *newDevices)
4867 {
4868 for (const auto& hwModule : mHwModulesAll) {
4869 if (std::find(mHwModules.begin(), mHwModules.end(), hwModule) != mHwModules.end()) {
4870 continue;
4871 }
4872 hwModule->setHandle(mpClientInterface->loadHwModule(hwModule->getName()));
4873 if (hwModule->getHandle() == AUDIO_MODULE_HANDLE_NONE) {
4874 ALOGW("could not open HW module %s", hwModule->getName());
4875 continue;
4876 }
4877 mHwModules.push_back(hwModule);
4878 // open all output streams needed to access attached devices
4879 // except for direct output streams that are only opened when they are actually
4880 // required by an app.
4881 // This also validates mAvailableOutputDevices list
4882 for (const auto& outProfile : hwModule->getOutputProfiles()) {
4883 if (!outProfile->canOpenNewIo()) {
4884 ALOGE("Invalid Output profile max open count %u for profile %s",
4885 outProfile->maxOpenCount, outProfile->getTagName().c_str());
4886 continue;
4887 }
4888 if (!outProfile->hasSupportedDevices()) {
4889 ALOGW("Output profile contains no device on module %s", hwModule->getName());
4890 continue;
4891 }
4892 if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_TTS) != 0) {
4893 mTtsOutputAvailable = true;
4894 }
4895 if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
4896 continue;
4897 }
4898 const DeviceVector &supportedDevices = outProfile->getSupportedDevices();
4899 DeviceVector availProfileDevices = supportedDevices.filter(mOutputDevicesAll);
4900 sp<DeviceDescriptor> supportedDevice = 0;
4901 if (supportedDevices.contains(mDefaultOutputDevice)) {
4902 supportedDevice = mDefaultOutputDevice;
4903 } else {
4904 // choose first device present in profile's SupportedDevices also part of
4905 // mAvailableOutputDevices.
4906 if (availProfileDevices.isEmpty()) {
4907 continue;
4908 }
4909 supportedDevice = availProfileDevices.itemAt(0);
4910 }
4911 if (!mOutputDevicesAll.contains(supportedDevice)) {
4912 continue;
4913 }
4914 sp<SwAudioOutputDescriptor> outputDesc = new SwAudioOutputDescriptor(outProfile,
4915 mpClientInterface);
4916 audio_io_handle_t output = AUDIO_IO_HANDLE_NONE;
4917 status_t status = outputDesc->open(nullptr, DeviceVector(supportedDevice),
4918 AUDIO_STREAM_DEFAULT,
4919 AUDIO_OUTPUT_FLAG_NONE, &output);
4920 if (status != NO_ERROR) {
4921 ALOGW("Cannot open output stream for devices %s on hw module %s",
4922 supportedDevice->toString().c_str(), hwModule->getName());
4923 continue;
4924 }
4925 for (const auto &device : availProfileDevices) {
4926 // give a valid ID to an attached device once confirmed it is reachable
4927 if (!device->isAttached()) {
4928 device->attach(hwModule);
4929 mAvailableOutputDevices.add(device);
4930 device->setEncapsulationInfoFromHal(mpClientInterface);
4931 if (newDevices) newDevices->add(device);
4932 setEngineDeviceConnectionState(device, AUDIO_POLICY_DEVICE_STATE_AVAILABLE);
4933 }
4934 }
4935 if (mPrimaryOutput == 0 &&
4936 outProfile->getFlags() & AUDIO_OUTPUT_FLAG_PRIMARY) {
4937 mPrimaryOutput = outputDesc;
4938 }
4939 if ((outProfile->getFlags() & AUDIO_OUTPUT_FLAG_DIRECT) != 0) {
4940 outputDesc->close();
4941 } else {
4942 addOutput(output, outputDesc);
4943 ALOGI("open output stream for device %s on hw module %s mSamplingRate = %d, mFormat = %d, mChannelMask = %d, mFlags = %d",
4944 outputDesc->devices().toString().c_str(), hwModule->getName(), outputDesc->getSamplingRate(),
4945 outputDesc->getFormat(), outputDesc->getChannelMask(), outProfile->getFlags());
4946 setOutputDevices(outputDesc,
4947 DeviceVector(supportedDevice),
4948 true,
4949 0,
4950 NULL);
4951 }
4952 }
4953 // open input streams needed to access attached devices to validate
4954 // mAvailableInputDevices list
4955 for (const auto& inProfile : hwModule->getInputProfiles()) {
4956 if (!inProfile->canOpenNewIo()) {
4957 ALOGE("Invalid Input profile max open count %u for profile %s",
4958 inProfile->maxOpenCount, inProfile->getTagName().c_str());
4959 continue;
4960 }
4961 if (!inProfile->hasSupportedDevices()) {
4962 ALOGW("Input profile contains no device on module %s", hwModule->getName());
4963 continue;
4964 }
4965 // chose first device present in profile's SupportedDevices also part of
4966 // available input devices
4967 const DeviceVector &supportedDevices = inProfile->getSupportedDevices();
4968 DeviceVector availProfileDevices = supportedDevices.filter(mInputDevicesAll);
4969 if (availProfileDevices.isEmpty()) {
4970 ALOGE("%s: Input device list is empty!", __FUNCTION__);
4971 continue;
4972 }
4973 sp<AudioInputDescriptor> inputDesc =
4974 new AudioInputDescriptor(inProfile, mpClientInterface);
4975
4976 audio_io_handle_t input = AUDIO_IO_HANDLE_NONE;
4977 status_t status = inputDesc->open(nullptr,
4978 availProfileDevices.itemAt(0),
4979 AUDIO_SOURCE_MIC,
4980 AUDIO_INPUT_FLAG_NONE,
4981 &input);
4982 if (status != NO_ERROR) {
4983 ALOGW("Cannot open input stream for device %s on hw module %s",
4984 availProfileDevices.toString().c_str(),
4985 hwModule->getName());
4986 continue;
4987 }
4988 for (const auto &device : availProfileDevices) {
4989 // give a valid ID to an attached device once confirmed it is reachable
4990 if (!device->isAttached()) {
4991 device->attach(hwModule);
4992 device->importAudioPortAndPickAudioProfile(inProfile, true);
4993 mAvailableInputDevices.add(device);
4994 if (newDevices) newDevices->add(device);
4995 setEngineDeviceConnectionState(device, AUDIO_POLICY_DEVICE_STATE_AVAILABLE);
4996 }
4997 }
4998 inputDesc->close();
4999 }
5000 }
5001 }比如在打开primary module时：
-
遍历第一个输出mixport（primary output），routes中包含primary output的有：Earpiece, Speaker, Wired Headset, Wired Headphones, BT SCO, BT SCO Headset,, BT A2DP Out, BT A2DP Headphones, BT A2DP Speaker, HDMI, USB Device Out, Line, FM, Proxy。这部分设备Earpiece和Speaker存在于attachedDevices中，因此primary output流会被打开。
-
遍历第六个输出mixport（compress_passthrough），routes中包含compress_passthrough的有：HDMI，这个设备不在attachedDevices中，因此开机初始化时compress_passthrough流不会被打开。只有当HDMI插入时才会打开。