android Audio调试程序常用命令

常用命令：

(一)

在android中通过adb shell播放一首歌曲：
adb shell am start -a "android.intent.action.VIEW" -t "audio/mp3" -d "file:///storage/sdcard0/Music/hello.mp3"

也可以终端直接使用．
am start -a "android.intent.action.VIEW" -t "audio/mp3"-d "file:///storage/sdcard0/Music/hello.mp3"

(二)

录音：

arecord -D plughw:2,0 -r 8000 -c2 -f S16_LE > /data/tests/1channel_test.wav

Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 8000 Hz, Stereo

放音：

aplay -D plughw:0,0 -f dat /data/tests/1channel_test.wav

Playing WAVE '/data/tests/1channel_test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo

(三)amixer controls

amixer cset numid=1 60:60：　改变numid=1的设备的音量

arecord -Dhw:0,2 -r48000 -f S32_LE -c 2 | aplay -Dhw:0,1 -r48000//一边采集一边播放
amixer cget controls中所输出的某个参数
amixer cset controls中所输出的某个参数具体的值(比如,0,1,On,Off等)

以下转载自网络，有更加详细的解释．

ALSA音频工具amixer,aplay,arecord

ALSA音频工具编译安装

========================================================================
1.官网http://www.alsa-project.org下载alsa-lib和alsa-utils
我的版本:alsa-lib-1.0.27.2.tar.bz2 和alsa-utils-1.0.27.2.tar.bz2
2.创建/home/m/3rd/alsa目录,并在目录下创建install目录,接着把压缩包拷到alsa目录下
3.编译alsa-lib步骤
tar -xvf alsa-lib-1.0.27.2.tar.bz2
cd alsa-lib-1.0.27.2
CC=arm-none-linux-gnueabi-gcc ./configure --host=arm-linux --prefix=/home/m/3rd/alsa/install/
make
make install
4.编译alsa-utils步骤
tar -xvf alsa-utils-1.0.27.2.tar.bz2
cd alsa-utils-1.0.27.2
CC=arm-none-linux-gnueabi-gcc ./configure --prefix=/home/m/3rd/alsa/install/ --host=arm-linux --with-alsa-inc-prefix=/home/m/3rd/alsa/install/include --with-alsa-prefix=/home/m/3rd/alsa/install/lib --disable-alsamixer --disable-xmlto --disable-nls
make
5.简单说明
--prefix指定了alsa-lib编译后的安装目录,包含库和头文件,编译alsa-utils时候要指明它的库lib和头文件include的目录.
alsamixer是图形化的amixer工具,需要ncurses的支持,在secure CRT中乱码,怕麻烦用--disable-alsamixer禁用了它.
--disable-xmlto和--disable-nls去掉编译都不通过,没去研究为啥.
aplay和arecord是同一个东东改下名字就可以了

if (strstr(argv[0], "arecord")) {  
    stream = SND_PCM_STREAM_CAPTURE;  
    file_type = FORMAT_WAVE;  
    command = "arecord";  
    start_delay = 1;  
    direction = stdout;  
} else if (strstr(argv[0], "aplay")) {  
    stream = SND_PCM_STREAM_PLAYBACK;  
    command = "aplay";  
    direction = stdin;  
} else {  
    error(_("command should be named either arecord or aplay"));  
    return 1;  
}

========================================================================

声音录制

======================================================================

arecord帮助提示信息

arecord -l列出声卡和数字音频设备

-D参数用于指定音频设备PCM
以hwx,x开头
根据上面l列出的设备,如果选择tvp5158来录制声音的话那么pcm设备就位hw0,0,如果是tlv320aic3x则pcm设备为hw0,1,sii9135则pcm设备为hw0,2。
声卡号,设备号
-r指定采样频率:5512/8000/11025/16000/22050/32000/44100/48000/64000/88200/96000/176400/192000
-f指定采样格式上面列出了:cd/cdr/dat/S16_LE/S32_LE/...

arecord -D default:CARD=mcasp0 -d 100000   -f cd -t raw mysong15.raw
arecord -D default:CARD=mcasp0 -d 100000   -f dat -t raw mysong10.raw
arecord -D default:CARD=mcasp0 -d 100000   -f S16_LE -r 16000 -t raw mysong10.raw
arecord -Dhw:0,1 -r8000 -f cd /a/1.wmv
arecord -Dhw:0,0 -r8000 -f S16_LE -c 2 /a/1.wmv
arecord -Dhw:0,2 -r48000 -f S32_LE -c 2 /a/1.wmv

========================================================================

声音播放

========================================================================
aplay帮助提示信息和aplay -l 列出声卡和数字音频设备

-D参数用于指定音频设备PCM
以hwx,x开头
根据上面l列出的设备,如果选择tlv320aic3x来播放声音的话那么pcm设备就位hw0,1,如果是hdmi则pcm设备为hw0,0。
声卡号,设备号
-r指定采样频率:5512/8000/11025/16000/22050/32000/44100/48000/64000/88200/96000/176400/192000
-f指定采样格式上面列出了:cd/cdr/dat/S16_LE/S32_LE/...

aplay -Dhw:0,1 -r8000 -f cd /a/1.wmv
aplay -Dhw:0,1 -r48000 -f cd /a/1.wmv

arecord -Dhw:0,2 -r48000 -f S32_LE -c 2 | aplay -Dhw:0,1 -r48000//一边采集一边播放
========================================================================

简述amixer及其用法
alsamixer是Linux 音频架构ALSA中的Alsa工具的其中一个，用于配置音频的各个参数。
alsamixer是基于文本下的图形界面的，可以通过键盘的上下键，左右键等，很方便地设置需要的音量，开关某个switch（开关）等等操作。
amixer，是alsamixer的文本模式,即命令行模式，需要用amixer命令的形式去配置你的声卡的各个选项。
对于amixer的使用，你首先需要搞懂你要设置的参数是哪些，然后才可能去了解，如何去配置对应的值，整体来说，相对alsamixer来说，是有点繁琐，下面简要介绍其具体用法：

1.查看amixer支持的命令

===================================================================
amixer -h

2.查看可使用的接口

===================================================================
再看看当前你的音频系统（不同的音频驱动对应不同的内容和操作接口）提供了那些供你使用的接口去操作
关于驱动里面已经提供了多少接口可以去操作，可以用命令：
amixer contents
查看，比如:

========================================================================
3.如何去设置某个参数

========================================================================
总结起来就是，先要用get系列命令去看懂有哪些接口，然后再去用set系列的命令，去设置对应你所要设置的值。

查看获取某个设置项的值用amixer cget +控制参数
根据控制参数类型设置控制参数使用amixer cset +控制参数+" "+参数

想要针对某项设置，比如想要设置上面的的主音量，master volume，即controls中显示的：
numid=5,iface=MIXER,name=’PCM Volume’
那么，可以先看看当前的值：
# amixer cget numid=5,iface=MIXER,name=’PCM Volume’
numid=5,iface=MIXER,name=’PCM Volume’
; type=INTEGER,access=rw—R–,values=2,min=0,max=27,step=0
: values=27,27
| dBscale-min=-40.50dB,step=1.50dB,mute=0
显示的是最大的27，假设想要设置为25，那么就用cset去设置：
# amixer cset numid=5,iface=MIXER,name=’PCM Volume’ 25
numid=5,iface=MIXER,name=’PCM Volume’
; type=INTEGER,access=rw—R–,values=2,min=0,max=27,step=0
: values=25,25
| dBscale-min=-40.50dB,step=1.50dB,mute=0

再比如，去将’Mic Supply 的switch关闭：
# amixer cset numid=12,iface=MIXER,name=’Mic Supply Switch’ Off
numid=12,iface=MIXER,name=’Mic Supply Switch’
; type=ENUMERATED,access=rw——,values=1,items=2
; Item #0 ‘On’
; Item #1 ‘Off’
: values=1

总结一下用法，就是：
amixer cget controls中所输出的某个参数
amixer cset controls中所输出的某个参数具体的值(比如,0,1,On,Off等)

【提示】
同上面介绍的的cget/cset系列命令：
controls        show all controls for given card
contents        show contents of all controls for given card
cset cID P      set control contents for one control
cget cID        get control contents for one control

类似的，还有另外一套sget/sset系列的命令：
scontrols       show all mixer simple controls
scontents       show contents of all mixer simple controls (default command)
sset sID P      set contents for one mixer simple control
sget sID        get contents for one mixer simple control
也是同样做法，比如：
通过查看当然有哪些选择可以控制：
# amixer scontrols
Simple mixer control ‘Master’,0
Simple mixer control ‘Master Mode’,0
Simple mixer control ‘Master Mux’,0
Simple mixer control ‘Master Quality’,0
。。。

同理，amixer scontents，可以查看当前所有的值，具体就不在这列举了。
另外，去查看或者配置用sget，比如：
# amixer sget ‘Microphone Input’,0
Simple mixer control ‘Microphone Input’,0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]

如果想要修改对应设置，用amixer sset ，具体用法是：
amixer sset sID(控制字符串) P(支持的某个值)
其中sID，就是上面的Simple mixer control后面的那个字符串，比如’Master Mux’,0
而对其设置就是，先看看其提供了哪些供你设置的值：
# amixer sget ‘Master Mux’,0
Simple mixer control ‘Master Mux’,0
Capabilities: enum
Items: ‘Sum’ ‘DAC’ ‘Line’ ‘Mic’
Item0: ‘DAC’
然后比如要设置成Line的，就可以这样：
# amixer sset ‘Master Mux’,0 Line
Simple mixer control ‘Master Mux’,0
Capabilities: enum
Items: ‘Sum’ ‘DAC’ ‘Line’ ‘Mic’
Item0: ‘Line’

=======================================================================

amixer设置音量：
=======================================================================
1.设置声卡0左声道音量为200
amixer cset numid=6,iface=MIXER,name='L ADC VOLUME' 200
2.获取声卡0左声道音量值
root@dvr:~# amixer cget numid=6,iface=MIXER,name='L ADC VOLUME'
numid=6,iface=MIXER,name='L ADC VOLUME'
; type=INTEGER,access=rw------,values=1,min=0,max=255,step=0
: values=200
3.设置声卡0右声道音量为200
amixer cset numid=5,iface=MIXER,name='PCM Volume' 200
4.获取声卡0右声道音量值值
root@dvr:~# amixer cget numid=5,iface=MIXER,name='PCM Volume'
numid=5,iface=MIXER,name='R ADC VOLUME'
; type=INTEGER,access=rw------,values=1,min=0,max=255,step=0
: values=200
5.设置声卡1右声道音量为200
amixer -c 1 cset numid=5,iface=MIXER,name='PCM Volume' 200
6.获取声卡1右声道音量值
root@dvr:~# amixer -c 1 cget numid=5,iface=MIXER,name='PCM Volume'
numid=5,iface=MIXER,name='R ADC VOLUME'
; type=INTEGER,access=rw------,values=1,min=0,max=255,step=0
: values=200
7.设置声卡1左声道音量为200
amixer -c 1 cset numid=6,iface=MIXER,name='L ADC VOLUME' 200
8.获取声卡1左声道音量值
root@dvr:~# amixer -c 1 cget numid=6,iface=MIXER,name='L ADC VOLUME'
numid=6,iface=MIXER,name='L ADC VOLUME'
; type=INTEGER,access=rw------,values=1,min=0,max=255,step=0
: values=200
========================================================================

参考：http://blog.csdn.net/paomadi/article/details/8866944

lucid (1) aplay.1.gz
Provided by: alsa-utils_1.0.22-0ubuntu5_i386

NAME

       arecord,  aplay  -  command-line  sound  recorder  and  player for ALSA
       soundcard driver

SYNOPSIS

       arecord [flags] [filename]
       aplay [flags] [filename [filename]] ...

DESCRIPTION

       arecord is a command-line soundfile recorder  for  the  ALSA  soundcard
       driver.  It  supports several file formats and multiple soundcards with
       multiple devices. If recording with interleaved mode samples  the  file
       is automatically split before the 2GB filesize.

       aplay  is  much  the  same,  only  it  plays  instead of recording. For
       supported soundfile formats, the sampling rate, bit depth, and so forth
       can be automatically determined from the soundfile header.

       If filename is not specified, the standard output or input is used. The
       aplay utility accepts multiple filenames.

OPTIONS

       -h, --help
              Help: show syntax.

       --version
              Print current version.

       -l, --list-devices
              List all soundcards and digital audio devices

       -L, --list-pcms
              List all PCMs defined

       -D, --device=NAME
              Select PCM by name

       -q --quiet
              Quiet mode. Suppress messages (not sound :))

       -t, --file-type TYPE
              File type (voc, wav, raw or au).  If this parameter  is  omitted
              the WAVE format is used.

       -c, --channels=#
              The number of channels.  The default is one channel.

       -f --format=FORMAT
              Sample format
              Recognized sample formats are: S8 U8 S16_LE S16_BE U16_LE U16_BE
              S24_LE S24_BE U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE
              FLOAT_BE      FLOAT64_LE      FLOAT64_BE      IEC958_SUBFRAME_LE
              IEC958_SUBFRAME_BE MU_LAW A_LAW IMA_ADPCM MPEG GSM
              Some of these may not be available on selected hardware
              There are also two format shortcuts available:
              -f cd (16 bit little endian, 44100, stereo [-f S16_LE -c2 -r44100]
              -f dat (16 bit little endian, 48000, stereo) [-f S16_LE -c2 -r48000]
              If no format is given U8 is used.

       -r, --rate=#<Hz>
              Sampling rate in Hertz. The default rate is 8000 Hertz.

       -d, --duration=#
              Interrupt after # seconds.  A value of zero means infinity.  The
              default  is  zero, so if this option is omitted then the arecord
              process will run until it is killed.

       -s, --sleep-min=#
              Min ticks to sleep. The default is not to sleep.

       -M, --mmap
              Use memory-mapped (mmap) I/O mode for the audio stream.  If this
              option is not set, the read/write I/O mode will be used.

       -N, --nonblock
              Open  the  audio  device  in non-blocking mode. If the device is
              busy the program will exit immediately.  If this option  is  not
              set  the  program will block until the audio device is available
              again.

       -F, --period-time=#
              Distance between interrupts is #  microseconds.   If  no  period
              time  and  no  period size is given then a quarter of the buffer
              time is set.

       -B, --buffer-time=#
              Buffer duration is # microseconds  If  no  buffer  time  and  no
              buffer  size  is  given then the maximal allowed buffer time but
              not more than 500ms is set.

       --period-size=#
              Distance between interrupts is # frames If no period size and no
              period time is given then a quarter of the buffer size is set.

       --buffer-size=#
              Buffer duration is # frames If no buffer time and no buffer size
              is given then the maximal allowed buffer time but not more  than
              500ms is set.

       -A, --avail-min=#
              Min available space for wakeup is # microseconds

       -R, --start-delay=#
              Delay  for  automatic  PCM  start is # microseconds (relative to
              buffer size if <= 0)

       -T, --stop-delay=#
              Delay for automatic PCM stop is # microseconds from xrun

       -v, --verbose
              Show PCM structure and setup.  This option is accumulative.  The
              VU meter is displayed when this is given twice or three times.

       -V, --vumeter=TYPE
              Specifies  the VU-meter type, either stereo or mono.  The stereo
              VU-meter is available only for  2-channel  stereo  samples  with
              interleaved format.

       -I, --separate-channels
              One file for each channel

   Example:
       aplay -c 1 -t raw -r 22050 -f mu_law foobar
              will  play the raw file "foobar" as a 22050-Hz, mono, 8-bit, Mu-
              Law .au file.

       arecord -d 10 -f cd -t wav -D copy foobar.wav
              will record foobar.wav as a  10-second,  CD-quality  wave  file,
              using  the  PCM  "copy"  (which  might  be defined in the user’s
              .asoundrc file as:
              pcm.copy {
                type plug
                slave {
                  pcm hw
                }
                route_policy copy
              }

BUGS

       Note that .aiff files are not currently supported.

AUTHOR

       arecord and aplay are by Jaroslav Kysela <[email protected]> This document
       is by Paul Winkler <[email protected]>.  Updated for Alsa 0.9 by James
       Tappin <[email protected]>

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android Audio调试程序常用命令

常用命令：

ALSA音频工具amixer,aplay,arecord

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

SEE ALSO

BUGS

AUTHOR

Linux電源管理_Wakeup count功能－－（三）

Linux inotify的功能及實現原理

Linux電源管理_autosleep－－（五）

Makefile Summary

android Audio調試程序常用命令

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