Program Flow

The following figure illustrates the interaction between the Movie Sample program and the Media Device Manager (MDM). Source code for the Movie Sample is located in the \TOOLKIT\SAMPLES\MM\MOVIE subdirectory.

             ┌─────────────────┐    ┌─────────────────┐
             │     Movie       ├───│    Initialize   │
             │     Sample      │(1) │      Open       │
             │                 │    │     Device      │
             └──┬───────────┬──┘    └─────────────────┘
  Application  (2)         (3) Default
    Window                   Window
             ┌─────────────────┐
             │     Media       │
             │     Device      │
             │    Manager      │
             └───────┬─────────┘
                    (4)
                     
             ┌─────────────────┐
             │     Digital     │
             │      Video      │
             │       MCD       │
             └─────────────────┘

• The Movie Sample creates a standard window with a style of CS_MOVENOTIFY for the application window during initialization. The Movie Sample also initializes and loads a movie file into memory during initialization time.

• If you choose to play the movie in an application window, three string commands are generated and sent to the digital video MCD. They are window, load, and put. The following list describes these commands.

  window

  Specifies the characteristics of the application-defined window.

  Note: When a window handle is selected with the window command, the digital video MCD queries the size and position of the window. If the window is visible, the digital video MCD alters the size and position of the video accordingly. However, if the window size and position is changed while the window is hidden, the digital video MCD does not note the new size and position.

  load
  Loads the digital video file.
  put
  Places the movie in the application-defined window.
  These commands (window, load, and put) must be issued in sequence to play the movie in the application-defined window.
  (3)
  If you choose to play the movie in a default window, the load command is generated and issued to the digital video MCD.
  (4)
  When you select Play, the Movie Sample program calls the digital video MCD, through the Media Device Manager, to play the movie file.

  If you select Edit, processing is passed to the EditTheMovie procedure which loads the movie, and sets the data format to frames. It copies the first 25 frames to the clipboard. The 25 frames are pasted four times to the end of the movie file (duplicating the first 25 frames four times). Next, the EditTheMovie procedure cuts the first 10 frames from the movie, seeks to the end of the movie, and pastes the 10 frames to the end. The cut command deletes the specified number of frames from the position the application specifies to start the cut. Once the movie is edited, selecting Play causes the edited version of the movie to play. To play the original "unedited" movie file, exit the Movie Sample program, restart it, and select Play.

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