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| author | John W. Linville <linville@tuxdriver.com> | 2011-11-22 14:05:46 -0500 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-11-22 14:05:46 -0500 |
| commit | 515db09338704a6ad7d27b5f1e33820d3052edd2 (patch) | |
| tree | 74f915531710303397d34069b325c2be7a5ac93c /sound/core/pcm_lib.c | |
| parent | 30be52e44fd4276d768efffb55d424fb682e6505 (diff) | |
| parent | cfcfc9eca2bcbd26a8e206baeb005b055dbf8e37 (diff) | |
| download | blackbird-obmc-linux-515db09338704a6ad7d27b5f1e33820d3052edd2.tar.gz blackbird-obmc-linux-515db09338704a6ad7d27b5f1e33820d3052edd2.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Conflicts:
drivers/net/wireless/iwlegacy/iwl-debugfs.c
drivers/net/wireless/iwlegacy/iwl-rx.c
drivers/net/wireless/iwlegacy/iwl-scan.c
drivers/net/wireless/iwlegacy/iwl-tx.c
include/net/bluetooth/bluetooth.h
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 62e90b862a0d..3420bd3da5d7 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -23,6 +23,7 @@ #include <linux/slab.h> #include <linux/time.h> #include <linux/math64.h> +#include <linux/export.h> #include <sound/core.h> #include <sound/control.h> #include <sound/info.h> @@ -1399,6 +1400,32 @@ int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); +static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; + struct snd_interval *rate; + + rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + return snd_interval_list(rate, 1, &base_rate, 0); +} + +/** + * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling + * @runtime: PCM runtime instance + * @base_rate: the rate at which the hardware does not resample + */ +int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, + unsigned int base_rate) +{ + return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, + SNDRV_PCM_HW_PARAM_RATE, + snd_pcm_hw_rule_noresample_func, + (void *)(uintptr_t)base_rate, + SNDRV_PCM_HW_PARAM_RATE, -1); +} +EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); + static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { |
