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Added snd_pcm_hw_params_current() function and clear() functions for structures

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This commit is contained in:
Jaroslav Kysela 2002-10-12 10:38:43 +00:00
parent 453dd9f698
commit dac0626b9f
6 changed files with 56 additions and 2 deletions
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1
src/pcm/interval.h
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@ -30,6 +30,7 @@ int snd_interval_setinteger(snd_interval_t *i);
int snd_interval_empty(const snd_interval_t *i);
int snd_interval_single(const snd_interval_t *i);
int snd_interval_value(const snd_interval_t *i);
void snd_interval_set_value(snd_interval_t *i, unsigned int val);
int snd_interval_min(const snd_interval_t *i);
int snd_interval_max(const snd_interval_t *i);
int snd_interval_test(const snd_interval_t *i, unsigned int val);

8
src/pcm/interval_inline.h
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@ -60,6 +60,14 @@ INTERVAL_INLINE int snd_interval_value(const snd_interval_t *i)
return i->min;
}
INTERVAL_INLINE void snd_interval_set_value(snd_interval_t *i, unsigned int val)
{
i->openmax = i->openmin = 0;
i->min = i->max = val;
i->integer = 0;
i->empty = 0;
}
INTERVAL_INLINE int snd_interval_min(const snd_interval_t *i)
{
assert(!snd_interval_empty(i));

35
src/pcm/pcm.c
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@ -734,6 +734,41 @@ int snd_pcm_info(snd_pcm_t *pcm, snd_pcm_info_t *info)
return pcm->ops->info(pcm->op_arg, info);
}
/** \brief Retreive current PCM hardware configuration chosen with #snd_pcm_hw_params
* \param pcm PCM handle
* \param params Configuration space definition container
* \return 0 on success otherwise a negative error code
*/
int snd_pcm_hw_params_current(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
{
unsigned int frame_bits;
assert(pcm && params);
if (!pcm->setup)
return -EBADFD;
snd_pcm_hw_params_clear(params);
snd_mask_copy(&params->masks[SND_PCM_HW_PARAM_ACCESS], (snd_mask_t *)&pcm->access);
snd_mask_copy(&params->masks[SND_PCM_HW_PARAM_FORMAT], (snd_mask_t *)&pcm->format);
snd_mask_copy(&params->masks[SND_PCM_HW_PARAM_SUBFORMAT], (snd_mask_t *)&pcm->subformat);
frame_bits = snd_pcm_format_physical_width(pcm->format) * pcm->channels;
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_FRAME_BITS], frame_bits);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_CHANNELS], pcm->channels);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_RATE], pcm->rate);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_PERIOD_TIME], pcm->period_time);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_PERIOD_SIZE], pcm->period_size);
snd_interval_copy(&params->intervals[SND_PCM_HW_PARAM_PERIODS], &pcm->periods);
snd_interval_copy(&params->intervals[SND_PCM_HW_PARAM_BUFFER_TIME], &pcm->buffer_time);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_BUFFER_SIZE], pcm->buffer_size);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_BUFFER_BYTES], (pcm->buffer_size * frame_bits) / 8);
snd_interval_set_value(&params->intervals[SND_PCM_HW_PARAM_TICK_TIME], pcm->tick_time);
params->info = pcm->info;
params->msbits = pcm->msbits;
params->rate_num = pcm->rate_num;
params->rate_den = pcm->rate_den;
params->fifo_size = pcm->fifo_size;
return 0;
}
/** \brief Install one PCM hardware configuration chosen from a configuration space and #snd_pcm_prepare it
* \param pcm PCM handle
* \param params Configuration space definition container

2
src/pcm/pcm_local.h
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@ -170,6 +170,7 @@ struct _snd_pcm {
unsigned int rate; /* rate in Hz */
snd_pcm_uframes_t period_size;
unsigned int period_time; /* period duration */
snd_interval_t periods;
unsigned int tick_time;
snd_pcm_tstamp_t tstamp_mode; /* timestamp mode */
unsigned int period_step;
@ -188,6 +189,7 @@ struct _snd_pcm {
unsigned int rate_den; /* rate denominator */
snd_pcm_uframes_t fifo_size; /* chip FIFO size in frames */
snd_pcm_uframes_t buffer_size;
snd_interval_t buffer_time;
unsigned int sample_bits;
unsigned int frame_bits;
snd_pcm_rbptr_t appl;