[OpenSmalltalk/opensmalltalk-vm] effa97: CogVM source as per VMMaker.oscog-eem.2949

 
  Branch: refs/heads/Cog
  Home:   https://github.com/OpenSmalltalk/opensmalltalk-vm
  Commit: effa97f75ee6bd216a482c3983b401feba1de05c
      https://github.com/OpenSmalltalk/opensmalltalk-vm/commit/effa97f75ee6bd216a482c3983b401feba1de05c
  Author: Eliot Miranda <[hidden email]>
  Date:   2021-04-12 (Mon, 12 Apr 2021)

  Changed paths:
    M platforms/Cross/plugins/CameraPlugin/CameraPlugin.h
    M platforms/iOS/plugins/CameraPlugin/AVFoundationVideoGrabber.m
    M platforms/unix/plugins/CameraPlugin/sqCamera-linux.c
    M platforms/win32/plugins/CameraPlugin/winCameraOps.cpp
    M src/plugins/CameraPlugin/CameraPlugin.c

  Log Message:
  -----------
  CogVM source as per VMMaker.oscog-eem.2949

Add CameraPlugin primSetCameraBuffers to avoid a copy when reading a frame.
Provide an implementation for macOS.