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Added const specifier in several functions

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Functions changed are:
 - pcm_params_get_mask
 - pcm_params_get_min
 - pcm_params_get_max
 - param_get_mask
 - param_get_min
 - param_get_max
This commit is contained in:
Taylor Holberton
2016-12-01 15:58:16 -08:00
parent 5b9db5b888
commit 2f387d2aa1
1 changed files with 14 additions and 9 deletions
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src/pcm.c
+14 -9
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@@ -64,6 +64,11 @@ static inline int param_is_interval(int p)
(p <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL);
}
static inline const struct snd_interval *param_get_interval(const struct snd_pcm_hw_params *p, int n)
{
return &(p->intervals[n - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]);
}
static inline struct snd_interval *param_to_interval(struct snd_pcm_hw_params *p, int n)
{
return &(p->intervals[n - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]);
@@ -94,19 +99,19 @@ static void param_set_min(struct snd_pcm_hw_params *p, int n, unsigned int val)
}
}
static unsigned int param_get_min(struct snd_pcm_hw_params *p, int n)
static unsigned int param_get_min(const struct snd_pcm_hw_params *p, int n)
{
if (param_is_interval(n)) {
struct snd_interval *i = param_to_interval(p, n);
const struct snd_interval *i = param_get_interval(p, n);
return i->min;
}
return 0;
}
static unsigned int param_get_max(struct snd_pcm_hw_params *p, int n)
static unsigned int param_get_max(const struct snd_pcm_hw_params *p, int n)
{
if (param_is_interval(n)) {
struct snd_interval *i = param_to_interval(p, n);
const struct snd_interval *i = param_get_interval(p, n);
return i->max;
}
return 0;
@@ -696,7 +701,7 @@ static int pcm_param_to_alsa(enum pcm_param param)
* Otherwise, the mask associated with @p param is returned.
* @ingroup libtinyalsa-pcm
*/
struct pcm_mask *pcm_params_get_mask(struct pcm_params *pcm_params,
const struct pcm_mask *pcm_params_get_mask(const struct pcm_params *pcm_params,
enum pcm_param param)
{
int p;
@@ -710,7 +715,7 @@ struct pcm_mask *pcm_params_get_mask(struct pcm_params *pcm_params,
return NULL;
}
return (struct pcm_mask *)param_to_mask(params, p);
return (const struct pcm_mask *)param_to_mask(params, p);
}
/** Get the minimum of a specified PCM parameter.
@@ -719,7 +724,7 @@ struct pcm_mask *pcm_params_get_mask(struct pcm_params *pcm_params,
* @returns On success, the parameter minimum.
* On failure, zero.
*/
unsigned int pcm_params_get_min(struct pcm_params *pcm_params,
unsigned int pcm_params_get_min(const struct pcm_params *pcm_params,
enum pcm_param param)
{
struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params;
@@ -741,10 +746,10 @@ unsigned int pcm_params_get_min(struct pcm_params *pcm_params,
* @returns On success, the parameter maximum.
* On failure, zero.
*/
unsigned int pcm_params_get_max(struct pcm_params *pcm_params,
unsigned int pcm_params_get_max(const struct pcm_params *pcm_params,
enum pcm_param param)
{
struct snd_pcm_hw_params *params = (struct snd_pcm_hw_params *)pcm_params;
const struct snd_pcm_hw_params *params = (const struct snd_pcm_hw_params *)pcm_params;
int p;
if (!params)