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PgCreateVideoChannel()

Create a channel for video streaming

Synopsis:

PgVideoChannel_t * PgCreateVideoChannel(
                      unsigned type,
                      unsigned flags );

Arguments:

type

The type of channel to create. Currently, the only defined type is Pg_VIDEO_CHANNEL_SCALER. This specifies that the video channel is for outputting video frames using scaler hardware.

flags

There are currently no flags; pass 0 for this argument.

Library:

ph

Description:

This function creates a channel to be used for video streaming, and reserves the video hardware for exclusive use by the application.

Returns:

A pointer to a PgVideoChannel_t structure that describes a channel for subsequent video operations, or NULL if a video channel couldn't be created (errno is set).

Errors:

EBUSY

Scaler hardware is present, but is in use by another application.

ENXIO

No scaler hardware is present.

Classification:

Photon

Safety:
Interrupt handler	No
Signal handler	No
Thread	No

See also:

PgConfigScalerChannel(), PgDestroyVideoChannel(), PgGetOverlayChromaColor(), PgGetScalerCapabilities(), PgNextVideoFrame(), PgScalerCaps_t, PgScalerProps_t, PgVideoChannel_t

"Video overlay" in the Raw Drawing and Animation chapter of the Photon Programmer's Guide

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