linux-kernel - Re: [PATCH] usbaudio: Fix wrong bitrate for Creative Creative VF0470 Live Cam

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Date:	Tue, 02 Mar 2010 13:06:19 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Arseniy Lartsev <arseniy@...lesh.ru>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usbaudio: Fix wrong bitrate for Creative Creative VF0470 Live Cam

At Tue, 2 Mar 2010 14:52:28 +0300,
Arseniy Lartsev wrote:
> 
> This patch works around misbehaviour of Creative Creative VF0470 Live Cam
> which reports 16 kHz sample rate for audio capture while actually producing
> 8 kHz stream.
> 
> Signed-off-by: Arseniy Lartsev <arseniy@...lesh.ru>

Thanks.  Applied now with minor coding-style fixes.


Takashi

> --
> diff -rup linux-2.6.33-rc8-orig/sound/usb/usbaudio.c linux-2.6.33-
> rc8/sound/usb/usbaudio.c
> --- linux-2.6.33-rc8-orig/sound/usb/usbaudio.c
> +++ linux-2.6.33-rc8/sound/usb/usbaudio.c
> @@ -2513,6 +2513,9 @@ static int parse_audio_format_rates(stru
>  			     chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
>  			    fp->altsetting == 5 && fp->maxpacksize == 392)
>  				rate = 96000;
> +			/* Creative VF0470 Live Cam reports 16 kHz instead of 8 */
> +			if ((rate == 16000) && (chip->usb_id == USB_ID(0x041e, 0x4068)))
> +				rate = 8000;
>  			fp->rate_table[fp->nr_rates] = rate;
>  			if (!fp->rate_min || rate < fp->rate_min)
>  				fp->rate_min = rate;
> 
--
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