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[ALSA] pcm: add snd_pcm_rate_to_rate_bit() helper

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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>
This commit is contained in:
Clemens Ladisch
2007-08-13 17:40:54 +02:00
committed by Jaroslav Kysela
parent 7653d55760
commit 918f3a0e8c
8 changed files with 47 additions and 145 deletions
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21
sound/pci/bt87x.c
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@@ -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;