Transplant tinyplay for imx6q development board QT system

Supporting information in the network disk information “iTOP-i.MX6 Development board data summary （ No CD data ）\08_iTOP-i.MX6 Development board Linux System development information \13-Linux System migration tinyplay\iTOP-iMX6-Linux System - Sound card transplantation tinyplay.zip”

tinyalsa yes Google stay Android 4.0 The later push is based on alsa User layer audio interface of kernel .tinyalsa The provided header file is "asoundlib.h", Provide the most basic pcm and mixer operation .

tinyalsa The implementation file of is pcm.c（ Realization pcm api） and mixer.c（ Realization mixer api）. There are four gadgets in them

Namely ：

tinypcminfo：tinypcminfo.c, see pcm Equipment capacity ;

tinyplay：tinyplay.c, Use pcm Device playback wav Audio files in format ;

tinycap：tinycap.c, Use pcm Device acquisition pcm Format bitstream , And save for wav File format ;

tinymix：tinymix.c, Yes pcm Control of equipment , Including volume adjustment 、 Device switching .

These four tools can be used first tinypcminfo see pcm The ability of the device , In case we use unreasonable configuration when using the other three commands parameter invalid Error of .

This document applies to the minimum Linux System and Qt System .

78.1 Source code compilation

Check the content of the compressed package provided this time , They are guidance documents , Test music and source folder , As shown in the figure below .

  The folder in the package that will be provided tinyalsa copy to Ubunut Working directory of , Pictured .

  This compilation environment is “arm-2009q3”, As shown in the figure below .

  Enter into ubuntu Upper tinyalsa Folder , Enter a command in the current directory “make”, Automatic generation 4 individual Executable file “tinycap、tinymix、tinypcminfo、tinyplay”.

  Compile the complete .

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