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Add snd_pcm_hw_params_get/set_export_buffer()

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Add snd_pcm_hw_params_get/set_export_buffer() API functions.
They control to ensure the buffer export to other processes.
If this flag is set, the local buffer of a plugin is exported over IPC shm.
Otherwise the buffer can be handled only locally (no shm).

Also fixed Version file for 1.0.9.
This commit is contained in:
Takashi Iwai 2005-05-19 16:59:04 +00:00
parent 18053076e2
commit 4d7c53d280
7 changed files with 65 additions and 12 deletions
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30
src/pcm/pcm.c
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@ -3959,6 +3959,36 @@ int snd_pcm_hw_params_get_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *par
return 0;
}
/**
* \brief Restrict a configuration space to allow the buffer accessible from outside
* \param pcm PCM handle
* \param params Configuration space
* \param val 0 = disable, 1 = enable (default) exporting buffer
* \return 0 otherwise a negative error code
*/
int snd_pcm_hw_params_set_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
{
assert(pcm && params);
if (val)
params->flags |= SND_PCM_HW_PARAMS_EXPORT_BUFFER;
else
params->flags &= ~SND_PCM_HW_PARAMS_EXPORT_BUFFER;
return snd_pcm_hw_refine(pcm, params);
}
/**
* \brief Extract buffer accessibility from a configuration space
* \param pcm PCM handle
* \param *val 0 = disable, 1 = enable exporting buffer
* \return 0 otherwise a negative error code
*/
int snd_pcm_hw_params_get_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
{
assert(pcm && params && val);
*val = params->flags & SND_PCM_HW_PARAMS_EXPORT_BUFFER ? 1 : 0;
return 0;
}
/**
* \brief Extract period time from a configuration space
* \param params Configuration space