diff options
| -rw-r--r-- | src/pcm.c | 23 |
1 files changed, 14 insertions, 9 deletions
@@ -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) |