audioresample faile with alsasink

[brad2012]

hi all,

Could someone help me ?

the environment I used:
a sound card is I2S+ audio codec, that is comply ALSA.
I can play audio_src_32k_le.wav with sample rate conversion by aplay.
But it is fail when I try to play the same wav file by gstreamer.
After trace the flow in kernel .
I can see the audio data in kernel snd_pcm_lib_write_transfer(). The
function do copy from user about audio data.
when I start to play by gst-lanuch command.
there are a lot of "0000" audio data in kernel after a few bytes.
I do not have idea about this  phenomenon. 
the first few audio data is not "0000", but then a lot of "0000" audio data
in kernel , such that no sound to I2S+codec alsa device.




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