## wasapisrc

wasapisrc

## Properties

GstWasapiDeviceRole | role | Read / Write
gchar * | device | Read / Write
gboolean | exclusive | Read / Write
gboolean | low-latency | Read / Write
gboolean | use-audioclient3 | Read / Write

## Types and Values

struct | GstWasapiSrc

## Description

Provides audio capture from the Windows Audio Session API available with Vista and newer.

#### Example pipelines

    1

    gst-launch-1.0 -v wasapisrc ! fakesink

Capture from the default audio device and render to fakesink.

    1

    gst-launch-1.0 -v wasapisrc low-latency=true ! fakesink

Capture from the default audio device with the minimum possible latency and render to fakesink.

## Synopsis

### Element Information

plugin | wasapi
author | Nirbheek Chauhan <nirbheek@centricular.com>
class | Source/Audio

### Element Pads

name | src
direction | source
presence | always
details | audio/x-raw, format=(string)F32LE, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]

## Functions

## Types and Values

### struct GstWasapiSrc

    struct GstWasapiSrc {
      GstAudioSrc parent;

      IMMDevice *device;
      IAudioClient *client;
      IAudioClock *client_clock;
      guint64 client_clock_freq;
      IAudioCaptureClient *capture_client;
      HANDLE event_handle;
      /* Client was reset, so it needs to be started again */
      gboolean client_needs_restart;

      /* Actual size of the allocated buffer */
      guint buffer_frame_count;
      /* The mix format that wasapi prefers in shared mode */
      WAVEFORMATEX *mix_format;
      /* The probed caps that we can accept */
      GstCaps *cached_caps;
      /* The channel positions in the data read from the device
       * we will pass this to GstAudioRingbuffer so it can
       * translate it to the native GStreamer channel layout. */
      GstAudioChannelPosition *positions;

      /* properties */
      gint role;
      gint sharemode;
      gboolean loopback;
      gboolean low_latency;
      gboolean try_audioclient3;
      wchar_t *device_strid;
    };

## Property Details

### The `“role”` property

      “role”                     GstWasapiDeviceRole

Role of the device: communications, multimedia, etc

Flags: Read / Write

Default value: console

### The `“device”` property

      “device”                   gchar *

WASAPI playback device as a GUID string

Flags: Read / Write

### The `“exclusive”` property

      “exclusive”                gboolean

Open the device in exclusive mode

Flags: Read / Write

Default value: FALSE

### The `“low-latency”` property

      “low-latency”              gboolean

Optimize all settings for lowest latency. Always safe to enable.

Flags: Read / Write

Default value: FALSE

### The `“use-audioclient3”` property

      “use-audioclient3”         gboolean

Whether to use the Windows 10 AudioClient3 API when available

Flags: Read / Write

Default value: FALSE