snd_pcm_outputclass_event_t

Information about the output port.

Synopsis:

typedef struct snd_pcm_outputclass_event
{
    uint32_t  old_output_class;
    uint32_t  new_output_class;
} snd_pcm_outputclass_event_t;

Description:

The snd_pcm_outputclass_event structure describes information about the output class event. You can use this structure to get information about the outputclass for the PCM channel. You get handle about this structure from the snd_pcm_event_t() structure.

The members include:

old_output_class
The previous output class type. The valid values are:
  • SND_OUTPUT_CLASS_UKNOWN — the output channel is for an unknown type.
  • SND_OUTPUT_CLASS_SPEAKER — the output channel is for speakers that are connected to the system.
  • SND_OUTPUT_CLASS_HEADPHONE — the output channel is for headphones that are connected to the system.
  • SND_OUTPUT_CLASS_LINEOUT— the output channel is for the line-out channel of the system.
  • SND_OUTPUT_CLASS_BLUETOOTH— the output channel is for Bluetooth.
  • SND_OUTPUT_CLASS_TOSLINK — the output channel is for an S-Link connector.
  • SND_OUTPUT_CLASS_MIRACAST — the output channel is for Miracast.
  • SND_NUM_OUTPUT_CLASSES — an end-of-list identifier that indicates the total number of output types recognized by this library.
new_output_class
The current output class that the channel was changed to which caused the event to occur. The valid values are:
  • SND_OUTPUT_CLASS_UKNOWN — the output channel is for an unknown type.
  • SND_OUTPUT_CLASS_SPEAKER — the output channel is for speakers that are connected to the system.
  • SND_OUTPUT_CLASS_HEADPHONE — the output channel is for headphones that are connected to the system.
  • SND_OUTPUT_CLASS_LINEOUT — the output channel is for the line-out channel of the system.
  • SND_OUTPUT_CLASS_BLUETOOTH — the output channel is for Bluetooth.
  • SND_OUTPUT_CLASS_TOSLINK — the output channel is for an S-Link connector.
  • SND_OUTPUT_CLASS_MIRACAST — the output channel is for Miracast.
  • SND_NUM_OUTPUT_CLASSES — an end-of-list identifier that indicates the total number of output types recognized by this library.

Classification:

QNX Neutrino

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