RE: [Alsa-user] ALSA - CMI8788 card - sound not playing.

[<sak...@wi...>]

I am not getting the sound o/p with the default values.
I am calling the snd_pcm_hw_params_set_buffer_size_near(),
snd_pcm_hw_params_set_period_size_near() functions
For setting the period size and buffer size().

The returned values are for CMI 8788 are 32, 64 respectively. I am
writing 32 frames using snd_pcm_writei().NO sound output.=20

The same APIs are used for intel and application is giving the proper
output. Buffer sizes and period sizes are 16384 and 1024 respectively.

My Question: 1. snd_pcm_hw_params_set_buffer_size_near() - APIs should
return same value for all cards. Or it will differ from card to card.
Could it be problem with the CMI8788 driver on ALSA support?=20
2. Should I need to use buffertime Apis? I am not clear on this?




-----Original Message-----
From: als...@li...
[mailto:als...@li...] On Behalf Of Clemens
Ladisch
Sent: Wednesday, August 31, 2005 2:55 PM
To: Sakthi Subramanian (WT01 - Semiconductors & Consumer Electronics)
Cc: als...@li...
Subject: Re: [Alsa-user] ALSA - CMI8788 card - sound not playing.

sak...@wi... wrote:
>      I have a developed sample playback application which is playing=20
> the sound properly for 48 Khz, 44.1 Khz for intel sound card which is=20
> built in Pentium PC.
> For setting the period size and buffer size ...

Why do you set them?  Is there anything wrong with the default values?


Regards,
Clemens



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