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Added snd_pcm_hw_params_set_rate_resample function

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- snd_pcm_hw_params_set_rate_resample()
- snd_pcm_hw_params_get_rate_resample()
This commit is contained in:
Jaroslav Kysela 2005-04-12 12:09:55 +00:00
parent 72ad0e9ae7
commit f65d9f3108
9 changed files with 72 additions and 4 deletions
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30
src/pcm/pcm.c
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@ -744,6 +744,7 @@ int snd_pcm_hw_params_current(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
if (!pcm->setup)
return -EBADFD;
memset(params, 0, snd_pcm_hw_params_sizeof());
params->flags = pcm->hw_flags;
snd_mask_copy(&params->masks[SND_PCM_HW_PARAM_ACCESS - SND_PCM_HW_PARAM_FIRST_MASK], (snd_mask_t *)&pcm->access);
snd_mask_copy(&params->masks[SND_PCM_HW_PARAM_FORMAT - SND_PCM_HW_PARAM_FIRST_MASK], (snd_mask_t *)&pcm->format);
snd_mask_copy(&params->masks[SND_PCM_HW_PARAM_SUBFORMAT - SND_PCM_HW_PARAM_FIRST_MASK], (snd_mask_t *)&pcm->subformat);
@ -3909,6 +3910,35 @@ int snd_pcm_hw_params_set_rate_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
return snd_pcm_hw_param_set_last(pcm, params, SND_PCM_HW_PARAM_RATE, val, dir);
}
/**
* \brief Restrict a configuration space to contain only real hardware rates
* \param pcm PCM handle
* \param params Configuration space
* \param val 0 = disable, 1 = enable (default) rate resampling
* \return 0 otherwise a negative error code
*/
int snd_pcm_hw_params_set_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
{
assert(pcm && params);
if (!val)
params->flags |= SND_PCM_HW_PARAMS_NORESAMPLE;
else
params->flags &= ~SND_PCM_HW_PARAMS_NORESAMPLE;
return snd_pcm_hw_refine(pcm, params);
}
/**
* \brief Extract resample state from a configuration space
* \param pcm PCM handle
* \param *val 0 = disable, 1 = enable rate resampling
* \return 0 otherwise a negative error code
*/
int snd_pcm_hw_params_get_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
{
assert(pcm && params && val);
*val = params->flags & SND_PCM_HW_PARAMS_NORESAMPLE ? 0 : 1;
return 0;
}
/**
* \brief Extract period time from a configuration space