Example: play video within Xterm

2024-09-19 11:50:19 -06:00 · 2022-01-04 23:01:16 -06:00 · 2022-01-04 23:01:16 -06:00 · 8c9c567312
commit 8c9c567312
parent df624db085
1 changed files with 117 additions and 0 deletions
--- a/examples/XtermVideoPlayer.java
+++ b/examples/XtermVideoPlayer.java
@ -0,0 +1,117 @@
+import java.awt.image.BufferedImage;
+import java.io.File;
+import jexer.TApplication;
+import jexer.TExceptionDialog;
+import jexer.TImage;
+import jexer.TWindow;
+import jexer.event.TResizeEvent;
+import org.bytedeco.javacv.FFmpegFrameGrabber;
+import org.bytedeco.javacv.Java2DFrameConverter;
+
+public class XtermVideoPlayer extends TApplication {
+
+    // The image reference.
+    private TImage image;
+
+    // Constructor sets up widgets.
+    public XtermVideoPlayer(String filename) throws Exception {
+        super(BackendType.XTERM);
+
+        // Create standard menus for Tool, File, and Window.
+        addToolMenu();
+        addFileMenu();
+        addWindowMenu();
+
+        // Add a single image to a window.  We will load frames into this
+        // image.
+        TWindow window = new TWindow(this, filename, 0, 0,
+            getScreen().getWidth(), getScreen().getHeight() - 2) {
+            @Override
+            public void onResize(final TResizeEvent event) {
+                if (event.getType() == TResizeEvent.Type.WIDGET) {
+                    TResizeEvent imageSize;
+                    imageSize = new TResizeEvent(event.getBackend(),
+                        TResizeEvent.Type.WIDGET, event.getWidth() - 2,
+                        event.getHeight() - 2);
+                    image.onResize(imageSize);
+                }
+            }
+        };
+
+        image = window.addImage(0, 0, window.getWidth() - 2,
+            window.getHeight() - 2, new BufferedImage(720, 360,
+                BufferedImage.TYPE_INT_ARGB), 0, 0);
+        image.setScaleType(TImage.Scale.SCALE);
+    }
+
+    // Function that grabs frames from a file and displays them in image.
+    private void getFrames(final File file) {
+        FFmpegFrameGrabber grabber = null;
+        try {
+            Java2DFrameConverter conv = new Java2DFrameConverter();
+            grabber = new FFmpegFrameGrabber(file);
+            grabber.start();
+            while (isRunning()) {
+                BufferedImage frame;
+                frame = conv.convert(grabber.grab());
+                if ((image != null) && (frame != null)) {
+                    invokeLater(new Runnable() {
+                        public void run() {
+                            image.setImage(frame);
+                            // image.setScaleType(TImage.Scale.SCALE);
+                            doRepaint();
+                        }
+                    });
+                } else if ((image != null) && (frame == null)) {
+                    // Frame is null.
+                }
+                try {
+                    // Ideally we would sync with the real video speed and
+                    // drop frames as needed.  For this example we will just
+                    // grab at about 20 fps.
+                    Thread.sleep(50);
+                } catch (InterruptedException e) {
+                    // SQUASH
+                }
+            }
+        } catch (Exception e) {
+            // Show this exception to the user.
+            invokeLater(new Runnable() {
+                public void run() {
+                    new TExceptionDialog(XtermVideoPlayer.this, e);
+                }
+            });
+            // And exit the thread
+        }
+        if (grabber != null) {
+            try {
+                grabber.release();
+            } catch (Exception e) {
+                // Show this exception to the user.
+                invokeLater(new Runnable() {
+                    public void run() {
+                        new TExceptionDialog(XtermVideoPlayer.this, e);
+                    }
+                });
+            }
+        }
+    }
+
+    public static void main(String [] args) throws Exception {
+        if (args.length == 0) {
+            System.err.println("USAGE: java XtermVideoPlayer filename");
+            System.exit(-1);
+        }
+        File file = new File(args[0]);
+        if (!file.canRead()) {
+            System.err.println("Cannot read from file: " + args[0]);
+            System.exit(-1);
+        }
+
+        XtermVideoPlayer app = new XtermVideoPlayer(args[0]);
+        // The application will spin on its thread.
+        (new Thread(app)).start();
+
+        app.getFrames(new File(args[0]));
+    }
+}