diff options
| author | Takashi Iwai <tiwai@suse.de> | 2009-02-16 22:48:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-16 17:52:49 -0700 |
| commit | 052bfb327a2624ac0cc36a4a0a420488bc28b363 (patch) | |
| tree | 54b9b0f50373134ade851fda0efb2fe8106fbae2 /sound/usb/usbaudio.c | |
| parent | 680e9398245ae6d34419624cfa716b13dd2bb0b7 (diff) | |
ALSA: usb-audio - Fix non-continuous rate detection
commit 0412558c873f716efe902b397af0653a550f7341 upstream.
The detection of non-continuous rates (given via rate tables) isn't
processed properly (e.g. for type II).
This patch fixes and simplifies the detection code.
Tested-by: Joris van Rantwijk <jorispubl@xs4all.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/usb/usbaudio.c')
| -rw-r--r-- | sound/usb/usbaudio.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 7a1a8c8245d0..85bcb37211d2 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -2516,7 +2516,6 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform * build the rate table and bitmap flags */ int r, idx; - unsigned int nonzero_rates = 0; fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); if (fp->rate_table == NULL) { @@ -2524,24 +2523,26 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform return -1; } - fp->nr_rates = nr_rates; - fp->rate_min = fp->rate_max = combine_triple(&fmt[8]); + fp->nr_rates = 0; + fp->rate_min = fp->rate_max = 0; for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { unsigned int rate = combine_triple(&fmt[idx]); + if (!rate) + continue; /* C-Media CM6501 mislabels its 96 kHz altsetting */ if (rate == 48000 && nr_rates == 1 && chip->usb_id == USB_ID(0x0d8c, 0x0201) && fp->altsetting == 5 && fp->maxpacksize == 392) rate = 96000; - fp->rate_table[r] = rate; - nonzero_rates |= rate; - if (rate < fp->rate_min) + fp->rate_table[fp->nr_rates] = rate; + if (!fp->rate_min || rate < fp->rate_min) fp->rate_min = rate; - else if (rate > fp->rate_max) + if (!fp->rate_max || rate > fp->rate_max) fp->rate_max = rate; fp->rates |= snd_pcm_rate_to_rate_bit(rate); + fp->nr_rates++; } - if (!nonzero_rates) { + if (!fp->nr_rates) { hwc_debug("All rates were zero. Skipping format!\n"); return -1; } |