snd_pcm_info_t

Capability information about a PCM device

Synopsis:

typedef struct snd_pcm_info
{
    uint32_t    type;
    uint32_t    flags;
    uint8_t     id[64];
    uint8_t     name[80];
    int32_t     playback;
    int32_t     capture;
    int32_t     card;
    int32_t     device;
    int32_t     shared_card;
    int32_t     shared_device;
    uint8_t     reserved[128];      /* must be filled with zeroes */
}       snd_pcm_info_t;

Description:

The snd_pcm_info_t structure describes the capabilities of a PCM device. The members include:

type

Sound card type. Deprecated. Do not use.

flags

Any combination of:

• SND_PCM_INFO_PLAYBACK -- the playback channel is present.
• SND_PCM_INFO_CAPTURE -- the capture channel is present.
• SND_PCM_INFO_DUPLEX -- the hardware is capable of duplex operation.
• SND_PCM_INFO_DUPLEX_RATE -- the playback and capture rates must be same for the duplex operation.
• SND_PCM_INFO_DUPLEX_MONO -- the playback and capture must be monophonic for the duplex operation.
• SND_PCM_INFO_SHARED -- some or all of the hardware channels are shared using software PCM mixing.

id[64]

ID of this PCM device (user selectable).

name[80]

Name of the device.

playback

Number of playback subdevices - 1.

capture

Number of capture subdevices - 1.

card

Card number.

device

Device number.

shared_card

Number of shared cards for this PCM device.

shared_device

Number of shared devices for this PCM device.

Classification:

QNX Neutrino

See also:

snd_ctl_pcm_info(), snd_pcm_info()