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disp_vcap_channel_caps_t

Capabilities of a video capture unit

Synopsis:

typedef struct {
    unsigned    flags;

    unsigned    input_format;
    int     frame_width;
    int     frame_height;
    int     frame_rate;

    unsigned    output_format;

    unsigned    reserved[10];
} disp_vcap_channel_caps_t;

Description:

The disp_vcap_channel_caps_t structure describes the capabilities of a video capture unit. The members include:

flags

Flags that describe the capabilities:

• DISP_VCAP_CAP_SOURCE_TUNER -- can capture video from a TV tuner.
• DISP_VCAP_CAP_SOURCE_SVIDEO -- can capture video from an S-Video connector.
• DISP_VCAP_CAP_SOURCE_COMPOSITE -- can capture video from an Composite video connector.
• DISP_VCAP_CAP_BRIGHTNESS_ADJUST -- brightness can be adjusted.
• DISP_VCAP_CAP_CONTRAST_ADJUST -- contrast can be adjusted.
• DISP_VCAP_CAP_SATURATION_ADJUST -- saturation can be adjusted.
• DISP_VCAP_CAP_HUE_ADJUST -- green Hue can be adjusted.
• DISP_VCAP_CAP_AUDIO_SOURCE_MUTE -- audio can be muted.
• DISP_VCAP_CAP_AUDIO_SOURCE_TUNER -- audio can be routed from a TV tuner through the capture unit.
• DISP_VCAP_CAP_AUDIO_SOURCE_EXTERNAL -- audio can be routed from an external line in through the capture unit.
• DISP_VCAP_CAP_DOWNSCALING -- the capture unit can scale video frames downwards.
• DISP_VCAP_CAP_UPSCALING -- the capture unit can scale video frames upwards.
• DISP_VCAP_CAP_CROPPING -- the capture unit can crop frames prior to scaling.
• DISP_VCAP_CAP_DOUBLE_BUFFER -- the capture unit can alternate its output between two buffers.

input_format

The format of the incoming video signal; one of:

• DISP_TV_SIGNAL_NTSC
• DISP_TV_SIGNAL_NTSC_JAPAN
• DISP_TV_SIGNAL_PAL
• DISP_TV_SIGNAL_PAL_M
• DISP_TV_SIGNAL_PAL_N
• DISP_TV_SIGNAL_PAL_N_COMBO
• DISP_TV_SIGNAL_SECAM

frame_width

The width of the output frames, in pixels, prior to scaling.

frame_height

The height of the output frames, in scanlines, prior to scaling.

frame_rate

The frequency of frames output, in Hz (e.g. 30 for NTSC).

output_format

The data format of the frames output by the scaler unit; see "Pixel formats" in the Writing a Graphics Driver chapter.

Classification:

Photon

See also:

disp_vcapfuncs_t