ALSA: Make pcm.h self-contained

Move the macros depending on snd_mask_min() and co out of pcm.h into
pcm_params.h.  Otherwise using some params_*() macros will give comiple
errors without inclusion of pcm_params.h.

Also use hw_param_interval_c() and hw_param_mask_c() for const pointer.

Reported-by: Tim Blechmann <tim@klingt.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 15 insertions, 1 deletions

diff --git a/include/sound/pcm_params.h b/include/sound/pcm_params.h
index 85cf1cf4f31a..f494f1e3c900 100644
--- a/include/sound/pcm_params.h
+++ b/include/sound/pcm_params.h
@@ -337,5 +337,19 @@ static inline unsigned int sub(unsigned int a, unsigned int b)
         return 0;
 }
 
-#endif /* __SOUND_PCM_PARAMS_H */
+#define params_access(p) ((__force snd_pcm_access_t)\
+                snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_ACCESS)))
+#define params_format(p) ((__force snd_pcm_format_t)\
+                snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_FORMAT)))
+#define params_subformat(p) \
+        snd_mask_min(hw_param_mask_c((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
 
+static inline unsigned int
+params_period_bytes(const struct snd_pcm_hw_params *p)
+{
+        return (params_period_size(p) *
+                snd_pcm_format_physical_width(params_format(p)) *
+                params_channels(p)) / 8;
+}
+
+#endif /* __SOUND_PCM_PARAMS_H */