ALSA: pcm: use helper functions to refer parameters as constants

To fixup some parameters, ALSA PCM core refers the other parameters as
constants. There're some macros for this purpose.

This commit replaces codes with them.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 422ee4629698a1bd57f537ceba3569449d640571..87a507f12f2ff28495c104b58121577dcb874f72 100644 (file)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -444,8 +444,8 @@ int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
                      struct snd_pcm_hw_params *params)
 {
        struct snd_pcm_hardware *hw;
-       struct snd_interval *i = NULL;
-       struct snd_mask *m = NULL;
+       const struct snd_interval *i;
+       const struct snd_mask *m;
        int err;
 
        params->info = 0;
@@ -470,13 +470,13 @@ int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
                return err;
 
        if (!params->msbits) {
-               i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
+               i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
                if (snd_interval_single(i))
                        params->msbits = snd_interval_value(i);
        }
 
        if (!params->rate_den) {
-               i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+               i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
                if (snd_interval_single(i)) {
                        params->rate_num = snd_interval_value(i);
                        params->rate_den = 1;
@@ -492,8 +492,8 @@ int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
                                          SNDRV_PCM_INFO_MMAP_VALID);
        }
        if (!params->fifo_size) {
-               m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
-               i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+               m = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
+               i = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
                if (snd_mask_single(m) && snd_interval_single(i)) {
                        err = substream->ops->ioctl(substream,
                                        SNDRV_PCM_IOCTL1_FIFO_SIZE, params);