[PATCH] usbaudio: Fix wrong bitrate for Creative Creative VF0470 Live Cam

From: Arseniy Lartsev
Date: Tue Mar 02 2010 - 07:53:23 EST


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@xxxxxxxxxx>

--
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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