Method and apparatus for connecting video sources and video sink

Details Method and apparatus for connecting video sources and video sink Method and apparatus for connecting video sources and video sink

1995-09-28

1998-12-22

Burgess, Glenton B.

Television

Combined with diverse art device

348232, 348714, 348719, H04N 530

Patent

active

058524720

ABSTRACT:
A method for creating a video connection between a video source for transmitting frames of video data and a video sink for receiving the frames. The video source may be a file, a camera, a computer network, and a telephony interface. The video sink may be a file, a visual display device, a computer network, and a telephony interface. The video source has a recycle framehandler function for recycling used buffers and the video sink has a process framehandler function for processing received frames. A video stream object is created having data members that include a reference to the video sink and a reference to the video source, as well as several member functions. The member functions are used to query the video sink to obtain a reference to the process framehandler function and to then provide the reference to the video source. The member functions are also used to query the video source to obtain a reference to the recycle framehandler function, which is then provided to the video sink. The reference to the process framehandler function is stored as a data member of a first framehandler object to be used by the video source, and the reference to the recycle framehandler function is stored as a data member of a second framehandler object to be used by the video sink. The video source may then directly invoke the process framehandler function and the video sink may directly invoke the recycle framehandler function.

REFERENCES:
patent: 5016107 (1991-05-01), Sasson et al.
patent: 5488570 (1996-01-01), Agarwal
patent: 5515296 (1996-05-01), Agarwal
patent: 5563655 (1996-10-01), Lathrop
patent: 5627825 (1997-05-01), Barraclough et al.

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