This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.

disp_vid_channel_props_t

Configurable properties of a video scaler channel

Synopsis:

#include <vid.h>

typedef struct {
    unsigned short   size;
    unsigned short   reserved0;
    unsigned         flags;
    unsigned         format;
    disp_color_t     chroma_key0;
    unsigned         reserved1;
    unsigned         chroma_flags;
    disp_color_t     chroma_key_mask;
    disp_color_t     chroma_mode;
    int              x1, y1;
    int              x2, y2;
    int              src_width, src_height;
    unsigned         fmt_index;
    short            brightness;
    short            contrast;
    disp_vid_alpha_t alpha [DISP_VID_MAX_ALPHA];
    unsigned         reserved [8];
} disp_vid_channel_props_t;

Description:

The disp_vid_channel_props_t structure describes the configurable properties of a video scaler channel. The members include:

size

The size of this structure.

reserved0, reserved1, reserved

Reserved, don't examine or modify.

flags

A combination of the following bits:

• DISP_VID_FLAG_ENABLE -- enable the video viewport.
• DISP_VID_FLAG_CHROMA_ENABLE -- perform chroma-keying.
• DISP_VID_FLAG_DOUBLE_BUFFER -- perform double-buffering.

format

The format of the frame data.

chroma_key0

The chroma-key color.

chroma_flags

The chroma-key comparison operation.

chroma_key_mask

Colors are masked with this before chroma comparison.

chroma_mode

The type of chroma key match to perform:

• DISP_VID_CHROMA_FLAG_DST -- perform chroma test on desktop data.
• DISP_VID_CHROMA_FLAG_SRC -- perform chroma test on video frame data.

x1, y1

The top left corner of video viewport in display coordinates.

x2, y2

The bottom right corner of video viewport in display coordinates.

src_width, src_height

The dimensions of the video source data.

fmt_index

Selects the format of the source frame data.

brightness

Brightness adjustment, where 0x7fff is normal, 0 the darkest, and 0xffff the brightest.

contrast

Contrast adjustment, where 0x7fff is normal, 0 the minimum, and 0xffff the maximum.

alpha

An array of regions of the video viewport to be blended with desktop. For more information, see disp_vid_alpha_t.

Classification:

Photon

See also:

disp_vid_alpha_t, disp_vidfuncs_t