snd_pcm_status_event_t

Information about status change because audio management occurred on the audio stream

Synopsis:

typedef struct snd_pcm_status_event
{
	uint32_t old_status;
	uint32_t new_status;
	uint32_t flags;
#define SND_PCM_STATUS_EVENT_HARD_SUSPEND (1<<0)
#define SND_PCM_STATUS_EVENT_SOFT_SUSPEND (1<<1)
#define SND_PCM_STATUS_EVENT_AUTOPAUSE    (1<<2)
} snd_pcm_status_event_t;

Description:

The snd_pcm_status_event structure describes status information about the event. You can use this structure to get information about the event. You get handle about this structure from the snd_pcm_event_t() structure.

The members include:

flags
The previous state that the channel had transitioned from, which can be one of the following list of states. For more information about the various states, see the PCM state machine section in the Audio Architecture chapter of this book.
new_status
The current state that the channel had transitioned to, which can be one of the following list of states. For more information about the various states, see the PCM state machine section in the Audio Architecture chapter of this book.
flags
A flag that indicates more information about the new status. It can be one of the following values:
  • SND_PCM_STATUS_EVENT_HARD_SUSPEND—The channel is in a hard suspended (SND_PCM_STATUS_SUSPENDED) state, which means the channel can't start playing when you call a snd_pcm_*_resume() function.
  • SND_PCM_STATUS_EVENT_SOFT_SUSPEND— The channel is in a soft suspended (SND_PCM_STATUS_SUSPENDED) state, which means the channel can start playing when you call a snd_pcm_*_resume() function.
  • SND_PCM_STATUS_EVENT_AUTOPAUSE—The channel is in the SUSPENDED (SND_PCM_STATUS_SUSPENDED) state, but when the suspension is lifted, the channel transitions to the PAUSED (SND_PCM_STATUS_PAUSED) state because the audio management policies were applied. In other words, the application didn't call a snd_pcm_*_pause() function to move to the PAUSED state.
.

Classification:

QNX Neutrino