[ALSA] pcm: add snd_pcm_rate_to_rate_bit() helper

Add a snd_pcm_rate_to_rate_bit() function to factor out common code used
by several drivers.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 5 insertions, 26 deletions

diff --git a/sound/ppc/pmac.c b/sound/ppc/pmac.c
index 04b95ae5c3aa..4f9b19c90a43 100644
--- a/sound/ppc/pmac.c
+++ b/sound/ppc/pmac.c
@@ -490,35 +490,14 @@ static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
                              struct snd_pcm_substream *subs)
 {
         struct snd_pcm_runtime *runtime = subs->runtime;
-        int i, j, fflags;
-        static int typical_freqs[] = {
-                44100,
-                22050,
-                11025,
-                0,
-        };
-        static int typical_freq_flags[] = {
-                SNDRV_PCM_RATE_44100,
-                SNDRV_PCM_RATE_22050,
-                SNDRV_PCM_RATE_11025,
-                0,
-        };
+        int i;
 
         /* look up frequency table and fill bit mask */
         runtime->hw.rates = 0;
-        fflags = chip->freqs_ok;
-        for (i = 0; typical_freqs[i]; i++) {
-                for (j = 0; j < chip->num_freqs; j++) {
-                        if ((chip->freqs_ok & (1 << j)) &&
-                            chip->freq_table[j] == typical_freqs[i]) {
-                                runtime->hw.rates |= typical_freq_flags[i];
-                                fflags &= ~(1 << j);
-                                break;
-                        }
-                }
-        }
-        if (fflags) /* rest */
-                runtime->hw.rates |= SNDRV_PCM_RATE_KNOT;
+        for (i = 0; i < chip->num_freqs; i++)
+                if (chip->freqs_ok & (1 << i))
+                        runtime->hw.rates |=
+                                snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
 
         /* check for minimum and maximum rates */
         for (i = 0; i < chip->num_freqs; i++) {