[alsa-devel] [PATCH] ALSA: Add params_width() helper

Mark Brown broonie at kernel.org
Mon Dec 23 13:48:58 CET 2013

From: Mark Brown <broonie at linaro.org>

Add a helper for obtaining the width of a format directly from params
since this is expected to become a common operation in ASoC.

Signed-off-by: Mark Brown <broonie at linaro.org>

Just starting on the ASoC changes to use this; I'm not 100% sure on the
lack of prefixing for the name but it's consistent with the other uses

 include/sound/pcm_params.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/sound/pcm_params.h b/include/sound/pcm_params.h
index 37ae12e..47b03b4 100644
--- a/include/sound/pcm_params.h
+++ b/include/sound/pcm_params.h
@@ -354,4 +354,10 @@ params_period_bytes(const struct snd_pcm_hw_params *p)
 		params_channels(p)) / 8;
+static inline unsigned int
+params_width(const struct snd_pcm_hw_params *p)
+	return snd_pcm_format_width(params_format(p));
 #endif /* __SOUND_PCM_PARAMS_H */

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