/**

• • \brief Check, if hardware supports pause

• • \brief Check if hardware supports pause

• \param params Configuration space

• • \return Boolean value

• \retval 0 Hardware doesn't support pause
• \retval 1 Hardware supports pause

• • It is not allowed to call this function when given configuration is not exactly one.
• • Usually, #snd_pcm_hw_params() function chooses one configuration
• • from the configuration space.

• • This function should only be called when the configuration space
• • contains a single configuration. Call #snd_pcm_hw_params to choose
• • a single configuration from the configuration space.

*/ int snd_pcm_hw_params_can_pause(const snd_pcm_hw_params_t *params)

What is the meaning of the configuration space contains a single configuration ?

since the hardware either support pause or does not support pause

it seem that only need to call snd_pcm_hw_params_any() instead of snd_pcm_hw_params() before calling snd_pcm_hw_params_can_pause()

err= snd_pcm_open(&pcm, device, stream, SND_PCM_NONBLOCK);

err= snd_pcm_hw_params_any(pcm, pars);

if (snd_pcm_hw_params_can_pause(pars)) printf("pcm device support pause\n");