readme

Linux 下C语言播放器程序

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README
This is a short readme explaining the srec/splay test application.
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To record use srec [options] destFile
	Options:
		-t seconds
			Number of seconds to record (required)
		-b bits
			Sample size in bits.  The default is 16.  (For mw8731, only 16-bit is allowed)
		-s frequency
			Sampling frequency in Hz.  The default is 8000.  (For mw8731, use either 8000 
			or 44100)
		-S
			Use this option to select stereo recording; the default (without -S) is mono
		-L
			Use this option to select LINE-IN as the recording source; the default (without 
			-L) is MIC-IN
		-l
			For loop back test

To playback use splay [options] sourceFile
	Options:
		-t seconds
			Number of seconds to play
		-b bits
			Sample size in bits.  The default is 16.  (For mw8731, only 16-bit is allowed)
		-s frequency
			Sampling frequency in Hz.  The default is 8000.  (For mw8731, use either 8000 
			or 44100)
		-S
			Use this option to select stereo recording; the default (without -S) is mono

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Examples:
# ./srec -t 5 -b 16 -s 44100 file.pcm

This records a 44.1kHz, 16 bit/sample PCM for 5 seconds and stores in file.pcm


# ./splay -b 16 -s 8000 file.pcm

This plays back file.pcm as a 8kHz, 16 bit/sample PCM file.

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Notes:
1) You will not hear the correct playback since file.pcm is a 44.1kHz PCM.
2) No need to specify time when using splay when you want to playback the whole PCM.
3) splay and srec are in fact the same executable with a different name.  See the Makefile
   for more information.