[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>

3 files changed, 9 insertions, 55 deletions

diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c
index f0e12985dc2..85d50b64d2b 100644
--- a/sound/pci/bt87x.c
+++ b/sound/pci/bt87x.c
@@ -340,28 +340,9 @@ static struct snd_pcm_hardware snd_bt87x_analog_hw = {
 
 static int snd_bt87x_set_digital_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime)
 {
-	static struct {
-		int rate;
-		unsigned int bit;
-	} ratebits[] = {
-		{8000, SNDRV_PCM_RATE_8000},
-		{11025, SNDRV_PCM_RATE_11025},
-		{16000, SNDRV_PCM_RATE_16000},
-		{22050, SNDRV_PCM_RATE_22050},
-		{32000, SNDRV_PCM_RATE_32000},
-		{44100, SNDRV_PCM_RATE_44100},
-		{48000, SNDRV_PCM_RATE_48000}
-	};
-	int i;
-
 	chip->reg_control |= CTL_DA_IOM_DA;
 	runtime->hw = snd_bt87x_digital_hw;
-	runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
-	for (i = 0; i < ARRAY_SIZE(ratebits); ++i)
-		if (chip->dig_rate == ratebits[i].rate) {
-			runtime->hw.rates = ratebits[i].bit;
-			break;
-		}
+	runtime->hw.rates = snd_pcm_rate_to_rate_bit(chip->dig_rate);
 	runtime->hw.rate_min = chip->dig_rate;
 	runtime->hw.rate_max = chip->dig_rate;
 	return 0;
diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c
index ee0189b756d..1475912588e 100644
--- a/sound/pci/rme32.c
+++ b/sound/pci/rme32.c
@@ -258,19 +258,6 @@ static inline unsigned int snd_rme32_pcm_byteptr(struct rme32 * rme32)
 		& RME32_RCR_AUDIO_ADDR_MASK);
 }
 
-static int snd_rme32_ratecode(int rate)
-{
-	switch (rate) {
-	case 32000: return SNDRV_PCM_RATE_32000;
-	case 44100: return SNDRV_PCM_RATE_44100;
-	case 48000: return SNDRV_PCM_RATE_48000;
-	case 64000: return SNDRV_PCM_RATE_64000;
-	case 88200: return SNDRV_PCM_RATE_88200;
-	case 96000: return SNDRV_PCM_RATE_96000;
-	}
-	return 0;
-}
-
 /* silence callback for halfduplex mode */
 static int snd_rme32_playback_silence(struct snd_pcm_substream *substream, int channel,	/* not used (interleaved data) */
 				      snd_pcm_uframes_t pos,
@@ -887,7 +874,7 @@ static int snd_rme32_playback_spdif_open(struct snd_pcm_substream *substream)
 	if ((rme32->rcreg & RME32_RCR_KMODE) &&
 	    (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) {
 		/* AutoSync */
-		runtime->hw.rates = snd_rme32_ratecode(rate);
+		runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
 		runtime->hw.rate_min = rate;
 		runtime->hw.rate_max = rate;
 	}       
@@ -929,7 +916,7 @@ static int snd_rme32_capture_spdif_open(struct snd_pcm_substream *substream)
 		if (isadat) {
 			return -EIO;
 		}
-		runtime->hw.rates = snd_rme32_ratecode(rate);
+		runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
 		runtime->hw.rate_min = rate;
 		runtime->hw.rate_max = rate;
 	}
@@ -965,7 +952,7 @@ snd_rme32_playback_adat_open(struct snd_pcm_substream *substream)
 	if ((rme32->rcreg & RME32_RCR_KMODE) &&
 	    (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) {
                 /* AutoSync */
-                runtime->hw.rates = snd_rme32_ratecode(rate);
+                runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
 	}        
@@ -989,7 +976,7 @@ snd_rme32_capture_adat_open(struct snd_pcm_substream *substream)
 		if (!isadat) {
 			return -EIO;
 		}
-                runtime->hw.rates = snd_rme32_ratecode(rate);
+                runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
         }
diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c
index ba4a34bae48..0b3c532c401 100644
--- a/sound/pci/rme96.c
+++ b/sound/pci/rme96.c
@@ -301,20 +301,6 @@ snd_rme96_capture_ptr(struct rme96 *rme96)
 }
 
 static int
-snd_rme96_ratecode(int rate)
-{
-    switch (rate) {
-    case 32000: return SNDRV_PCM_RATE_32000;
-    case 44100: return SNDRV_PCM_RATE_44100;
-    case 48000: return SNDRV_PCM_RATE_48000;
-    case 64000: return SNDRV_PCM_RATE_64000;
-    case 88200: return SNDRV_PCM_RATE_88200;
-    case 96000: return SNDRV_PCM_RATE_96000;
-    }
-    return 0;
-}
-
-static int
 snd_rme96_playback_silence(struct snd_pcm_substream *substream,
 			   int channel, /* not used (interleaved data) */
 			   snd_pcm_uframes_t pos,
@@ -1192,7 +1178,7 @@ snd_rme96_playback_spdif_open(struct snd_pcm_substream *substream)
 	    (rate = snd_rme96_capture_getrate(rme96, &dummy)) > 0)
 	{
                 /* slave clock */
-                runtime->hw.rates = snd_rme96_ratecode(rate);
+                runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
 	}        
@@ -1219,7 +1205,7 @@ snd_rme96_capture_spdif_open(struct snd_pcm_substream *substream)
                 if (isadat) {
                         return -EIO;
                 }
-                runtime->hw.rates = snd_rme96_ratecode(rate);
+                runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
         }
@@ -1259,7 +1245,7 @@ snd_rme96_playback_adat_open(struct snd_pcm_substream *substream)
 	    (rate = snd_rme96_capture_getrate(rme96, &dummy)) > 0)
 	{
                 /* slave clock */
-                runtime->hw.rates = snd_rme96_ratecode(rate);
+                runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
 	}        
@@ -1284,7 +1270,7 @@ snd_rme96_capture_adat_open(struct snd_pcm_substream *substream)
                 if (!isadat) {
                         return -EIO;
                 }
-                runtime->hw.rates = snd_rme96_ratecode(rate);
+                runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate);
                 runtime->hw.rate_min = rate;
                 runtime->hw.rate_max = rate;
         }