基于Android11简单分析audio_policy_configuration.xml
开篇先贴上一个高通的例子，后续基于此文件做具体分析。
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:
每个module标签对应有自己hal，也就是hal的源码实现都不一样，如primary、usb、a2dp等。
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：
audio.primary.sdm845.so
audio.a2dp.default.so
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，配置了自己的格式、采样率以及mask。
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。
MixPort中的flag
| AUDIO_OUTPUT_FLAG | Description |
| AUDIO_OUTPUT_FLAG_PRIMARY | 表示音频流需要输出到主输出设备，一般用于铃声类声音 |
| AUDIO_OUTPUT_FLAG_DIRECT | 表示音频流直接输出到音频设备，不需要软件混音，一般用于 HDMI 设备声音输出 |
| AUDIO_OUTPUT_FLAG_FAST | 表示音频流需要快速输出到音频设备，一般用于按键音、游戏背景音等对时延要求高的场景 |
| AUDIO_OUTPUT_FLAG_DEEP_BUFFER | 表示音频流输出可以接受较大的时延，一般用于音乐、视频播放等对时延要求不高的场景 |
| AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD | 表示音频流没有经过软件解码，需要输出到硬件解码器， |
devicePort:
包含可从此模块访问的所有输入和输出设备（包括永久连接的设备和可移除设备）的设备描述符列表。有实际的物理设备，在android中有定义的设备类型，比如AUDIO_DEVICE_OUT_SPEAKER、AUDIO_DEVICE_IN_HDMI、AUDIO_DEVICE_OUT_BLUETOOTH_A2DP等等，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，表示支持sampleRate、format和channelMask。
devicePort标签可以理解为一个device设备，设备也分output和input，但是不在像mixport那样以role来分，而是以type中含有的关键字“IN”和“OUT”来分，type用于设备的唯一标识。
routes：
route是把deviceport和mixport连接起来的路由，数据由一个stream输出到另一个device，或者从一个device输出到另一个stream，简单来说就是连接设备和流，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。
<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：
1. 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。
2. 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。
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：
1. 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。
2. 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。
相关文章：
基于Android11简单分析audio_policy_configuration.xml
开篇先贴上一个高通的例子，后续基于此文件做具体分析。 1 <?xml version"1.0" encoding"UTF-8" standalone"yes"?> 2 <!-- Copyright (c) 2016-2019, The Linux Foundation. All rights reserved 3 Not a Contribut…...
kafka-manager修改zookeeper端口号后启动仍然连接2181端口
问题描述： zookeeper默认端口号修改为了2182，kafka-manager的配置文件application.conf中也已经修改了zkhosts为新的端口号，然而启动kafka-manger时报错连接连接超时，发现连接的还是2181端口，很奇怪？&…...
RabbitMQ 入门(三)SpringAMQP
一、Spring AMQP 简介 SpringAMQP是基于RabbitMQ封装的一套模板，并且还利用SpringBoot对其实现了自动装配，使用起来非常方便。 SpringAmqp的官方地址：https://spring.io/projects/spring-amqp SpringAMQP提供了三个功能： - 自动…...
celery 项目中mysql 数据库连接数耗尽事故记录
python 项目中使用 celery 中导致mysql数据库连接耗尽记录【mysql数据库连接池使用错误】 结论：由于使用 celery 进行项目的多任务管理，在worker任务定义的过程中，使用了 dbutils 中的 PooledDB 连接池进行 mysql数据库连接， 因此…...
Python数据分析-Scipy科学计算法
1.认识Scipy SciPy（发音为 "Sigh Pie"）是一个开源的 Python 算法库和数学工具包。 通常与 NumPy、Matplotlib 和 pandas 等库一起使用，这些库共同构成了 Python 的科学计算基础。 2.使用Scipy基本函数 2.1 引用Scipy函数 impor…...
【Python Django + Vue】酒店在线预订系统：用技术说话！
🎓 作者：计算机毕设小月哥 | 软件开发专家 🖥️ 简介：8年计算机软件程序开发经验。精通Java、Python、微信小程序、安卓、大数据、PHP、.NET|C#、Golang等技术栈。 🛠️ 专业服务 🛠️ 需求定制化开发源码提…...
禁用微软的windos安全中心
目录 一、为什么禁用 二、WDControl_1.5.0程序禁用windows安全中心 步骤1--- 步骤2--- 三、禁用widows安全中心成功 一、为什么禁用 描述：下载第三方软件常常会收到病毒防护秒杀， 第1---直接无法下载 第2---提前下载在U盘解压会被干掉程序文件 …...
2.html编辑器介绍
html编辑器介绍 HTML 编辑器推荐 理论上我们可以使用记事本进行html编码和开发，但是在实际开发html页面的时候，使用一些专业的开发工具可以使我们更加快速和高效的进行开发，下面介绍几种开发工具： VS Code：https://…...
树莓派应用--AI项目实战篇来啦-17.YOLOv8目标检测-安全帽检测
1. YOLOv8介绍 YOLOv8是Ultralytics公司2023年推出的Yolo系列目标检测算法，可以用于图像分类、物体检测和实例分割等任务。YOLOv8作为YOLO系列算法的最新成员，在损失函数、Anchor机制、样本分配策略等方面进行了全面优化和创新。这些改进不仅提高了模型的…...
git-secret介绍
git-secret介绍 git-secret 是一个与git兼容的命令行工具，旨在安全地存储和管理敏感数据，如源代码中的密码、密钥以及敏感文件。它通过 GPG 加密来保护文件，确保只有授权的用户才能访问这些敏感信息。 使用流程 1、安装 Git-Secret：在本地开发环境中安装 git-secret。 2…...
【实战】Nginx+Lua脚本+Redis 实现自动封禁访问频率过高IP
大家好，我是冰河~~ 自己搭建的网站刚上线，短信接口就被一直攻击，并且攻击者不停变换IP，导致阿里云短信平台上的短信被恶意刷取了几千条，加上最近工作比较忙，就直接在OpenResty上对短信接口做了一些限制&am…...
计算机专业大一课程：线性代数探秘
计算机专业大一课程：线性代数探秘 对于计算机专业的大一新生来说，线性代数是一门基础且重要的课程。它不仅是数学的一个分支，更是计算机科学中不可或缺的工具。那么，线性代数究竟包含哪些内容，对我们的计算机学习有何…...
vscode写markdown插入图片视频并放在指定目录
目录 前言正文 前言 各种云文档非常好用，但是当你想把这些资料保存在本地时，markdown我觉得是最好的选择 markdown编辑器也有很多，但我还是觉得vscode最好用，直接粘贴文件就可以插入也类似云文档的使用体验，但是想要…...
鸿蒙富文本显示
1.使用 RichText 组件（ArkTS） 背景知识：在 ArkTS（一种鸿蒙应用开发语言）中，RichText组件提供了更强大的富文本显示功能。它允许设置不同的文本样式，包括字体、颜色、字号等多种属性。 Rich Te…...
手写mybatis之细化XML语句构建器，完善静态SQL解析
前言 1：在流程上，通过 DefaultSqlSession#selectOne 方法调用执行器，并通过预处理语句处理器 PreparedStatementHandler 执行参数设置和结果查询。 2：那么这个流程中我们所处理的参数信息，也就是每个 SQL 执行时&#…...
使用Milvus和Llama-agents构建更强大的Agent系统
代理（Agent）系统能够帮助开发人员创建智能的自主系统，因此变得越来越流行。大语言模型（LLM）能够遵循各种指令，是管理 Agent 的理想选择，在许多场景中帮助我们尽可能减少人工干预、处理更多复杂任…...
Python 工具库每日推荐【Arrow】
文章目录 引言Python时间日期处理库的重要性今日推荐：Arrow工具库主要功能：使用场景：安装与配置快速上手示例代码代码解释实际应用案例案例：跨时区会议安排器案例分析高级特性时间范围和区间自定义时间格式扩展阅读与资源优缺点分析优点：缺点：总结【 已更新完 TypeScript…...
Win10 安装 Redis 数据库
一、Redis 数据库介绍 Redis 是一个开源的高性能键值对（key-value）的非关系型数据库。它通常用作数据结构服务器，支持多种类型的数据结构，如字符串（strings）、哈希（hashes）、列表&a…...
使用springboot生成war包
1.生成war包 1.1 更改pom包 打开一个springboot 项目 ，右击项目名从项目管理器打开 在pom.xml文件中插入以下两个依赖 <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><…...
见微知著：OpenEuler系统启动流程
OpenEuler是一个开源的Linux发行版，它的启动流程涉及到多个阶段，包括固件初始化、引导加载程序、内核启动、初始化系统和服务管理器等。下面将详细介绍OpenEuler的启动流程。 一、启动流程 1. 固件初始化（BIOS/UEFI） 启动过程首…...
支持向量机-笔记
支持向量机（Support Vector Machine, SVM） 是一种强大的监督学习算法，广泛应用于分类和回归任务，特别是在分类问题中表现优异。SVM 的核心思想是通过寻找一个最优超平面，将不同类别的数据点进行分割，并最大…...
研发线上事故风险解读之缓存篇
专业在线打字练习平台-巧手打字通，只输出有价值的知识。 一 前言 本文继续基于《线上事故案例集》，进一步深入梳理线上事故缓存使用方面的问题点，重点关注缓存在使用和优化过程中可能出现的问题，旨在为读者提供具有实践指导意义的…...
JavaScript前端开发技术
JavaScript前端开发技术 引言 JavaScript（简称JS）是一种广泛使用的脚本语言，特别在前端开发领域，它几乎成为了网页开发的标配。从简单的表单验证到复杂的单页应用（SPA），JavaScript都扮演着不可…...
H.264 编码参数优化策略
一、概述 随着数字媒体技术的发展，视频编码成为了多媒体领域中的重要研究方向之一。而H.264作为一种广泛应用的视频编码标准，具有高压缩比、优质画面和广泛兼容性等优点。为了进一步提高视频质量和压缩效率，对H.264编码参数进行优化成为了一个…...
C++ 游戏开发技术选型指南
C 游戏开发技术选型指南 游戏开发是一个复杂而多元化的领域，而C凭借其高性能和强大的控制能力，成为许多游戏引擎的首选编程语言。在这篇博客中，我们将探讨如何选择合适的C技术栈进行游戏开发，包括技术背景、代码示例、优化实践、…...
基于Python Django的在线考试管理系统
🍊作者：计算机毕设匠心工作室 🍊简介：毕业后就一直专业从事计算机软件程序开发，至今也有8年工作经验。擅长Java、Python、微信小程序、安卓、大数据、PHP、.NET|C#、Golang等。 擅长：按照需求定制化开发项目…...
《Java基础》变量和数据类型
综述 在开始学习变量之前，我们思考一下为什么需要使用变量。 首先我们从小开始学习加法减法的时候，后来我们再学更难的东西就是代数，其中的x和y是我们要求解的内容，这些内容就是变量。 变量是人的思维的提升，没有变量…...
FLINK内存管理解析，taskmanager、jobmanager
1、在 Flink 中设置内存的方法是配置以下两个选项之一： 1）Total Flink memory：taskmanager.memory.flink.sizejobmanager.memory.flink.size 2）Total process memory：taskmanager.memory.process.sizejobmanager.mem…...
【AI论文精读13】RAG论文综述2（微软亚研院 2409）P5-可解释推理查询L3
AI知识点总结：【AI知识点】 AI论文精读、项目、思考：【AI修炼之路】 P1，P2，P3，P4 五、可解释推理查询（L3） ps：P2有四种查询（L1，L2，L3，…...
优达学城 Generative AI 课程3：Computer Vision and Generative AI
文章目录 1 官方课程内容自述第 1 课：图像生成简介第 2 课：计算机视觉基础第 3 课：图像生成与生成对抗网络（GANs）第 4 课：基于 Transformer 的计算机视觉模型第 5 课：扩散模型第 6 课࿰…...