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authorClemens Ladisch <clemens@ladisch.de>2010-03-04 19:46:15 +0100
committerTakashi Iwai <tiwai@suse.de>2010-03-05 08:18:32 +0100
commit015eb0b08150c6fef843efe22609589ead3d4fb8 (patch)
tree3ffcb8b5be54355761d94001a8c5415c965daccd /sound/usb/pcm.c
parente11b4e0e4f5ab40ec342dc07b7201c09a45f9574 (diff)
downloadlinux-linaro-015eb0b08150c6fef843efe22609589ead3d4fb8.tar.gz
ALSA: usb-audio: use a format bitmask per alternate setting
In preparation for USB audio 2.0 support, change the audioformat structure so that it uses a bitmask to specify possible formats. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index c3d5a977cfe..bd0f84f3a9d 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -58,7 +58,9 @@ static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned
list_for_each(p, &subs->fmt_list) {
struct audioformat *fp;
fp = list_entry(p, struct audioformat, list);
- if (fp->format != format || fp->channels != channels)
+ if (!(fp->formats & (1uLL << format)))
+ continue;
+ if (fp->channels != channels)
continue;
if (rate < fp->rate_min || rate > fp->rate_max)
continue;
@@ -428,10 +430,15 @@ static int hw_check_valid_format(struct snd_usb_substream *subs,
struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
+ struct snd_mask check_fmts;
unsigned int ptime;
/* check the format */
- if (!snd_mask_test(fmts, fp->format)) {
+ snd_mask_none(&check_fmts);
+ check_fmts.bits[0] = (u32)fp->formats;
+ check_fmts.bits[1] = (u32)(fp->formats >> 32);
+ snd_mask_intersect(&check_fmts, fmts);
+ if (snd_mask_empty(&check_fmts)) {
hwc_debug(" > check: no supported format %d\n", fp->format);
return 0;
}
@@ -584,7 +591,7 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
fp = list_entry(p, struct audioformat, list);
if (!hw_check_valid_format(subs, params, fp))
continue;
- fbits |= (1ULL << fp->format);
+ fbits |= fp->formats;
}
oldbits[0] = fmt->bits[0];