come from : https://blog.csdn.net/jinchengzhou/article/details/82897429
tinyalsa使用
tinyalsa源码位于android源码目录下external/tinyalsa，包含了四个命令，分别是tinymix，tinycap, tinyplay，tinymeminfo和一个库libtinyalsa.so
使用mmm命令编译，mmm external/tinyalsa
相关目录及文件
- /dev/snd/ 系统下control设备管理、pcm设备都在此目录下
- /proc/asound/ 声卡相关信息可以在此目录下找到，命令：
cat /proc/asound/cards可以查看系统下所有声卡及其ID - /sys/class/sound sys系统下声卡相关的文件结点在此目录下
1 tinymix
输入tinymixu会将声卡(不指定的话，默认为0)的所有control打印出来，下面为部分打印
-
# tinymix -
Mixer name: 'wm8962-audio' -
Number of controls: 105 -
ctl type num name value -
0 BOOL 2 Input Mixer Switch On On -
1 INT 1 MIXINL IN2L Volume 5 -
2 INT 1 MIXINL PGA Volume 0 -
3 INT 1 MIXINL IN3L Volume 5 -
4 INT 1 MIXINR IN2R Volume 5 -
5 INT 1 MIXINR PGA Volume 0 -
6 INT 1 MIXINR IN3R Volume 7 -
7 INT 2 Digital Capture Volume 108 108 -
8 INT 2 Capture Volume 63 63 -
9 BOOL 2 Capture Switch Off Off -
10 BOOL 2 Capture ZC Switch On On -
11 BOOL 1 Capture HPF Switch On -
12 ENUM 1 Capture HPF Mode Hi-fi
每个control都有一个ID，查看具体某个control
-
root@sabresd_6dq:/ # tinymix 8 -
Capture Volume: 63 63 (range 0->63)
改变某个control的值
-
root@sabresd_6dq:/ # tinymix 8 "31 31" -
root@sabresd_6dq:/ # tinymix 8 -
Capture Volume: 31 31 (range 0->63)
查看、修改enum类型的control，tinymix会列出所有control的选项，前面带>号为当前选项
-
root@sabresd_6dq:/ # tinymix 15 -
Capture LHPF Mode: >LPF HPF -
root@sabresd_6dq:/ # tinymix 15 HPF -
root@sabresd_6dq:/ # tinymix 15 -
Capture LHPF Mode: LPF >HPF
当前有多个声卡时，使用-D选项指定声卡，不指定的话默认为0
root@sabresd_6dq:/ # tinymix -D 1
Mixer name: 'imx-hdmi-soc'
Number of controls: 4
ctl type num name value
0 IEC958 1 IEC958 Playback Default unknown
1 INT 1 HDMI Support Channels 2
2 INT 3 HDMI Support Rates 32000 44100 48000
3 INT 1 HDMI Support Formats 16
2 tinyplay
tinyplay只能播放wav格式的音频文件 tinyplay test.wav
3 tinycap
录音格式如下，保存到record.wav tinycap /sdcard/record.wav
4 tinymeminfo
查看安卓系统的codec配置
执行tinymix命令：
对应codec功能模块图：
tinymix命令返回内容：
root@avl7420:/ # tinymix
Mixer name: 'ESPRESSO-RT5647'
Number of controls: 201
ctl type num name value
0 BOOL 2 DMIC2 Latch Switch On Off
1 BOOL 2 Speaker Playback Switch Off Off
2 INT 2 Speaker Playback Volume 31 31
3 BOOL 2 HP Playback Switch Off Off
4 INT 2 HP Playback Volume 31 31
5 BOOL 1 Mono Playback Switch Off
6 INT 1 Mono Playback Volume 31
7 BOOL 2 OUT Playback Switch Off Off
8 BOOL 2 OUT Channel Switch Off Off
9 INT 2 OUT Playback Volume 31 31
10 BOOL 2 DAC2 Playback Switch On On
11 INT 2 DAC1 Playback Volume 175 175
12 INT 2 Mono DAC Playback Volume 175 175
13 INT 2 HPMIX DAC1 Gain 3 3
14 INT 2 HPMIX DAC2 Gain 3 3
15 INT 2 HPMIX IN Gain 3 3
16 INT 2 HPMIX BST3 Gain 3 3
17 INT 2 HPMIX BST2 Gain 3 3
18 INT 1 HPMIXL BST1 Gain 3
19 INT 1 HPMIXR BST2 Gain 3
20 INT 2 SPKMIX IN Gain 3 3
21 INT 2 SPKMIX DAC1 Gain 3 3
22 INT 2 SPKMIX DAC2 Gain 3 3
23 INT 2 SPKMIX BST3 Gain 3 3
24 INT 1 SPKMIXL BST1 Gain 3
25 INT 1 SPKMIXR BST2 Gain 3
26 INT 1 MonoMix BST3 Gain 3
27 INT 1 MonoMix DACL2 Gain 3
28 INT 1 MonoMix DACR2 Gain 3
29 INT 1 MonoMix DACR1 Gain 3
30 INT 1 MonoMix BST2 Gain 3
31 INT 2 OUTMIX BST3 Gain 6 6
32 INT 2 OUTMIX IN Gain 6 6
33 INT 2 OUTMIX DAC2 Gain 6 6
34 INT 2 OUTMIX DAC1 Gain 6 6
35 INT 1 OUTMIXL BST1 Gain 3
36 INT 1 OUTMIXR BST2 Gain 3
37 BOOL 1 HPO Gain Off
38 INT 1 Speaker Output Gain 4
39 INT 1 IN1 Boost 5
40 INT 1 IN2 Boost 2
41 INT 1 IN3 Boost 0
42 ENUM 1 IN2 Mode Control Single ended
43 ENUM 1 IN3 Mode Control Single ended
44 INT 2 IN Capture Volume 23 23
45 BOOL 2 ADC Capture Switch Off Off
46 INT 2 ADC Capture Volume 87 87
47 INT 2 Mono ADC Capture Volume 47 47
48 INT 2 STO1 ADC Boost Gain 0 0
49 INT 2 STO2 ADC Boost Gain 0 0
50 INT 2 Mono ADC Boost Gain 0 0
51 INT 1 Mono ADC Comp Gain 0
52 INT 1 Stereo ADC Comp Gain 0
53 INT 2 RECMIX BST3 Gain 6 6
54 INT 2 RECMIX BST2 Gain 6 6
55 INT 2 RECMIX BST1 Gain 6 6
56 ENUM 1 ClassD Amp Ratio Gain Control 2.77x
57 INT 1 Bass Back Boost Gain 19
58 INT 1 TrueTreble Gain 6
59 BOOL 1 I2S2 Func Switch On
60 ENUM 1 Haptic Actuator Type AC
61 ENUM 1 Haptic Trigger Type Disable
62 BOOL 1 Haptic Enable Switch Off
63 ENUM 1 ADC IF2 Data Switch Normal
64 ENUM 1 DAC IF2 Data Switch Normal
65 ENUM 1 ADC IF3 Data Switch Normal
66 ENUM 1 DAC IF3 Data Switch Normal
67 ENUM 1 push button Disable
68 ENUM 1 jack type Disable
69 BOOL 1 HP Switch On
70 BOOL 1 SPK Switch On
71 BOOL 1 HDMI Switch On
72 BOOL 1 Main Mic Switch On
73 BOOL 1 Sub Mic Switch On
74 ENUM 1 AIF2 Mode Slave
75 ENUM 1 PDM1 R Mux Mono DAC
76 ENUM 1 PDM1 L Mux Mono DAC
77 BOOL 1 PDM R Switch Off
78 BOOL 1 PDM L Switch Off
79 BOOL 1 MONOAmp MIX DAC L2 Switch Off
80 BOOL 1 MONOAmp MIX MONOVOL Switch Off
81 BOOL 1 MONOVOL MIX DAC R1 Switch Off
82 BOOL 1 MONOVOL MIX DAC R2 Switch Off
83 BOOL 1 MONOVOL MIX DAC L2 Switch Off
84 BOOL 1 MONOVOL MIX BST3 Switch Off
85 BOOL 1 MONOVOL MIX BST2 Switch Off
86 BOOL 1 LOUT MIX DAC L1 Switch Off
87 BOOL 1 LOUT MIX DAC R1 Switch Off
88 BOOL 1 LOUT MIX OUTMIX L Switch Off
89 BOOL 1 LOUT MIX OUTMIX R Switch Off
90 BOOL 1 HPO MIX DAC1 Switch Off
91 BOOL 1 HPO MIX HPVOL Switch Off
92 BOOL 1 SPOR MIX DAC R1 Switch Off
93 BOOL 1 SPOR MIX SPKVOL R Switch Off
94 BOOL 1 SPOR MIX BST3 Switch Off
95 BOOL 1 SPOL MIX DAC R1 Switch Off
96 BOOL 1 SPOL MIX DAC L1 Switch Off
97 BOOL 1 SPOL MIX SPKVOL R Switch Off
98 BOOL 1 SPOL MIX SPKVOL L Switch Off
99 BOOL 1 SPOL MIX BST3 Switch Off
100 BOOL 1 HPOVOL R Switch Off
101 BOOL 1 HPOVOL L Switch Off
102 BOOL 1 HPOVOL MIXR DAC1 Switch Off
103 BOOL 1 HPOVOL MIXR DAC2 Switch Off
104 BOOL 1 HPOVOL MIXR INR Switch Off
105 BOOL 1 HPOVOL MIXR BST3 Switch Off
106 BOOL 1 HPOVOL MIXR BST2 Switch Off
107 BOOL 1 HPOVOL MIXL DAC1 Switch Off
108 BOOL 1 HPOVOL MIXL DAC2 Switch Off
109 BOOL 1 HPOVOL MIXL INL Switch Off
110 BOOL 1 HPOVOL MIXL BST3 Switch Off
111 BOOL 1 HPOVOL MIXL BST1 Switch Off
112 BOOL 1 SPKVOL R Switch Off
113 BOOL 1 SPKVOL L Switch Off
114 BOOL 1 MONOVOL Switch Off
115 BOOL 1 OUT MIXR BST3 Switch Off
116 BOOL 1 OUT MIXR BST2 Switch Off
117 BOOL 1 OUT MIXR INR Switch Off
118 BOOL 1 OUT MIXR DAC R2 Switch Off
119 BOOL 1 OUT MIXR DAC R1 Switch Off
120 BOOL 1 OUT MIXL BST3 Switch Off
121 BOOL 1 OUT MIXL BST1 Switch Off
122 BOOL 1 OUT MIXL INL Switch Off
123 BOOL 1 OUT MIXL DAC L2 Switch Off
124 BOOL 1 OUT MIXL DAC L1 Switch Off
125 BOOL 1 SPK MIXR DAC R1 Switch Off
126 BOOL 1 SPK MIXR DAC R2 Switch Off
127 BOOL 1 SPK MIXR INR Switch Off
128 BOOL 1 SPK MIXR BST3 Switch Off
129 BOOL 1 SPK MIXR BST2 Switch Off
130 BOOL 1 SPK MIXL DAC L1 Switch Off
131 BOOL 1 SPK MIXL DAC L2 Switch Off
132 BOOL 1 SPK MIXL INL Switch Off
133 BOOL 1 SPK MIXL BST3 Switch Off
134 BOOL 1 SPK MIXL BST1 Switch Off
135 BOOL 1 DAC MIXR Sto DAC Mix R Switch Off
136 BOOL 1 DAC MIXR DAC R2 Switch Off
137 BOOL 1 DAC MIXR DAC L2 Switch Off
138 BOOL 1 DAC MIXL Sto DAC Mix L Switch Off
139 BOOL 1 DAC MIXL DAC L2 Switch Off
140 BOOL 1 DAC MIXL DAC R2 Switch Off
141 BOOL 1 Mono DAC MIXR DAC R1 Switch Off
142 BOOL 1 Mono DAC MIXR DAC R2 Switch Off
143 BOOL 1 Mono DAC MIXR DAC L2 Switch Off
144 BOOL 1 Mono DAC MIXR Sidetone Switch Off
145 BOOL 1 Mono DAC MIXL DAC L1 Switch Off
146 BOOL 1 Mono DAC MIXL DAC L2 Switch Off
147 BOOL 1 Mono DAC MIXL DAC R2 Switch Off
148 BOOL 1 Mono DAC MIXL Sidetone Switch Off
149 BOOL 1 Stereo DAC MIXR DAC R1 Switch Off
150 BOOL 1 Stereo DAC MIXR DAC R2 Switch Off
151 BOOL 1 Stereo DAC MIXR DAC L1 Switch Off
152 BOOL 1 Stereo DAC MIXR ANC Switch Off
153 BOOL 1 Stereo DAC MIXL DAC L1 Switch Off
154 BOOL 1 Stereo DAC MIXL DAC L2 Switch Off
155 BOOL 1 Stereo DAC MIXL DAC R1 Switch Off
156 BOOL 1 Stereo DAC MIXL ANC Switch Off
157 ENUM 1 ANC Mux SNC
158 ENUM 1 Sidetone Mux DMIC L1
159 ENUM 1 DAC1 R Mux IF1 DAC
160 ENUM 1 DAC1 L Mux IF1 DAC
161 ENUM 1 DAC R2 Mux IF2 DAC
162 ENUM 1 DAC L2 Mux IF1 DAC
163 BOOL 1 DAC1 MIXR Stereo ADC Switch Off
164 BOOL 1 DAC1 MIXR DAC1 Switch On
165 BOOL 1 DAC1 MIXL Stereo ADC Switch Off
166 BOOL 1 DAC1 MIXL DAC1 Switch On
167 ENUM 1 VAD ADC Mux Sto1 ADC L
168 ENUM 1 IF3 ADC Mux VAD_ADC
169 ENUM 1 IF2 ADC Mux IF_ADC2
170 BOOL 1 Mono ADC MIXR ADC1 Switch Off
171 BOOL 1 Mono ADC MIXR ADC2 Switch On
172 BOOL 1 Mono ADC MIXL ADC1 Switch Off
173 BOOL 1 Mono ADC MIXL ADC2 Switch On
174 BOOL 1 Sto1 ADC MIXR ADC1 Switch Off
175 BOOL 1 Sto1 ADC MIXR ADC2 Switch On
176 BOOL 1 Sto1 ADC MIXL ADC1 Switch Off
177 BOOL 1 Sto1 ADC MIXL ADC2 Switch On
178 ENUM 1 Mono ADC R2 Mux DMIC
179 ENUM 1 Mono ADC R1 Mux ADC
180 ENUM 1 Mono ADC L1 Mux ADC
181 ENUM 1 Mono ADC L2 Mux DMIC
182 ENUM 1 Mono DMIC R Mux DMIC1
183 ENUM 1 Mono DMIC L Mux DMIC1
184 ENUM 1 Stereo1 ADC1 Mux ADC
185 ENUM 1 Stereo1 ADC 2 Mux DMIC
186 ENUM 1 Stereo1 DMIC Mux DMIC1
187 BOOL 1 RECMIXR MONO Switch Off
188 BOOL 1 RECMIXR HPOR Switch Off
189 BOOL 1 RECMIXR INR Switch Off
190 BOOL 1 RECMIXR BST3 Switch On
191 BOOL 1 RECMIXR BST2 Switch Off
192 BOOL 1 RECMIXR BST1 Switch On
193 BOOL 1 RECMIXR OUT MIXR Switch Off
194 BOOL 1 RECMIXL MONO Switch Off
195 BOOL 1 RECMIXL HPOL Switch Off
196 BOOL 1 RECMIXL INL Switch Off
197 BOOL 1 RECMIXL BST3 Switch On
198 BOOL 1 RECMIXL BST2 Switch Off
199 BOOL 1 RECMIXL BST1 Switch On
200 BOOL 1 RECMIXL OUT MIXL Switch Off
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come from : https://blog.csdn.net/ljl86400/article/details/80411125