diff options
| -rw-r--r-- | sound/usb/usbaudio.c | 45 |
1 files changed, 26 insertions, 19 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 56e42b8..8fd3759 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -186,6 +186,7 @@ struct snd_usb_substream { u64 formats; /* format bitmasks (all or'ed) */ unsigned int num_formats; /* number of supported audio formats (list) */ struct list_head fmt_list; /* format list */ + struct snd_pcm_hw_constraint_list rate_list; /* limited rates */ spinlock_t lock; struct snd_urb_ops ops; /* callbacks (must be filled at init) */ @@ -1818,28 +1819,33 @@ static int check_hw_params_convention(struct snd_usb_substream *subs) static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { - struct list_head *p; - struct snd_pcm_hw_constraint_list constraints_rates; + struct audioformat *fp; + int count = 0, needs_knot = 0; int err; - list_for_each(p, &subs->fmt_list) { - struct audioformat *fp; - fp = list_entry(p, struct audioformat, list); - - if (!fp->needs_knot) - continue; - - constraints_rates.count = fp->nr_rates; - constraints_rates.list = fp->rate_table; - constraints_rates.mask = 0; - - err = snd_pcm_hw_constraint_list(runtime, 0, - SNDRV_PCM_HW_PARAM_RATE, - &constraints_rates); - - if (err < 0) - return err; + list_for_each_entry(fp, &subs->fmt_list, list) { + if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) + return 0; + count += fp->nr_rates; + if (fp->needs_knot) + needs_knot = 1; } + if (!needs_knot) + return 0; + + subs->rate_list.count = count; + subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL); + subs->rate_list.mask = 0; + count = 0; + list_for_each_entry(fp, &subs->fmt_list, list) { + int i; + for (i = 0; i < fp->nr_rates; i++) + subs->rate_list.list[count++] = fp->rate_table[i]; + } + err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + &subs->rate_list); + if (err < 0) + return err; return 0; } @@ -2238,6 +2244,7 @@ static void free_substream(struct snd_usb_substream *subs) kfree(fp->rate_table); kfree(fp); } + kfree(subs->rate_list.list); } |
