alsasrc

alsasrc

Properties

gchar * card-name Read
gchar * device Read / Write
gchar * device-name Read

Types and Values

struct GstAlsaSrc

Description

This element reads data from an audio card using the ALSA API.

Example pipelines

1
gst-launch-1.0 -v alsasrc ! queue ! audioconvert ! vorbisenc ! oggmux ! filesink location=alsasrc.ogg
Record from a sound card using ALSA and encode to Ogg/Vorbis.

Synopsis

Element Information

plugin

alsa

author

Wim Taymans <wim@fluendo.com>

class

Source/Audio

Element Pads

name

src

direction

source

presence

always

details

audio/x-raw, format=(string){ S8, U8, S16LE, S16BE, U16LE, U16BE, S24_32LE, S24_32BE, U24_32LE, U24_32BE, S32LE, S32BE, U32LE, U32BE, S24LE, S24BE, U24LE, U24BE, S20LE, S20BE, U20LE, U20BE, S18LE, S18BE, U18LE, U18BE, F32LE, F32BE, F64LE, F64BE }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]

Functions

Types and Values

struct GstAlsaSrc

struct GstAlsaSrc {
  GstAudioSrc           src;

  gchar                 *device;

  snd_pcm_t             *handle;
  snd_pcm_hw_params_t   *hwparams;
  snd_pcm_sw_params_t   *swparams;

  GstCaps               *cached_caps;

  snd_pcm_access_t      access;
  snd_pcm_format_t      format;
  guint                 rate;
  guint                 channels;
  gint                  bpf;
  gboolean              driver_timestamps;

  guint                 buffer_time;
  guint                 period_time;
  snd_pcm_uframes_t     buffer_size;
  snd_pcm_uframes_t     period_size;

  GMutex                alsa_lock;
};

Opaque data structure

Property Details

The “card-name” property

  “card-name”                gchar *

Human-readable name of the sound card.

Flags: Read

Default value: ""


The “device” property

  “device”                   gchar *

ALSA device, as defined in an asound configuration file.

Flags: Read / Write

Default value: "default"


The “device-name” property

  “device-name”              gchar *

Human-readable name of the sound device.

Flags: Read

Default value: ""

See Also

alsasink