/*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package javax.microedition.media.control;
import javax.microedition.media.MediaException;
/**
* <code>VideoControl</code> controls the display of video.
* A <code>Player</code> which supports the playback of video
* must provide a <code>VideoControl</code> via its
* <code>getControl</code> and <code>getControls</code>
* method.
*
*/
public interface VideoControl extends GUIControl {
/**
* This defines a mode on how the video is displayed.
* It is used in conjunction with
* <a href="#initDisplayMode(int, java.lang.Object)">
* <code>initDisplayMode</code></a>.
* <p>
* <code>USE_DIRECT_VIDEO</code> mode can only be used
* on platforms with LCDUI support.
* <p>
* When <code>USE_DIRECT_VIDEO</code> is specified for
* <code>initDisplayMode</code>, the <code>arg</code>
* argument must not be null and must be a
* <code>javax.microedition.lcdui.Canvas</code> or a subclass of it.
* In this mode, the video is directly
* rendered onto the canvas. The region where the video
* is rendered can be set by the <code>setDisplayLocation</code>
* method. By default, the location is (0, 0).
* Drawing any graphics or rendering other video at the same
* region on the canvas may not be supported.
* <p>
* <code>initDisplayMode</code>
* returns <code>null</code> in this mode.
* <p>
* Here is one sample usage scenario:
* <pre>
* <code>
* javax.microedition.lcdui.Canvas canvas;
* // canvas must be created before being used in the following code.
*
* try {
* Player p = Manager.createPlayer("http://mymachine/abc.mpg");
* p.realize();
* VideoControl vc;
* if ((vc = (VideoControl)p.getControl("VideoControl")) != null) {
* vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, canvas);
* vc.setVisible(true);
* }
* p.start();
* } catch (MediaException pe) {
* } catch (IOException ioe) {
* }
* </code>
* </pre>
* <p>
* Value 1 is assigned to <code>USE_DIRECT_VIDEO</code>.
*/
int USE_DIRECT_VIDEO = 1;
/**
* Initialize the mode on how the video is displayed.
* This method must be called before video can be displayed.
* <p>
* Two modes are defined:
* <ul>
* <li> <a href="GUIControl.html#USE_GUI_PRIMITIVE"><code>USE_GUI_PRIMITIVE</code></a> (inherited from GUIControl)
* <li> <a href="#USE_DIRECT_VIDEO"><code>USE_DIRECT_VIDEO</code></a>
* </ul>
* On platforms with LCDUI support, both modes must be supported.
*
* @param mode The video mode that determines how video is
* displayed. It can be <code>USE_GUI_PRIMITIVE</code>,
* <code>USE_DIRECT_VIDEO</code> or an implementation-
* specific mode.
*
* @param arg The exact semantics of this argument is
* specified in the respective mode definitions.
*
* @return The exact semantics and type of the object returned
* are specified in the respective mode definitions.
*
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> is called again after it has
* previously been called successfully.
*
* @exception IllegalArgumentException Thrown if
* the <code>mode</code> or <code>arg</code>
* argument is invalid. <code>mode</code> must be
* <code>USE_GUI_PRIMITIVE</code>,
* <code>USE_DIRECT_VIDEO</code>, or a custom mode
* supported by this implementation.
* <code>arg</code> must conform to the
* conditions defined by the
* respective mode definitions.
* Refer to the mode definitions for the required type
* of <code>arg</code>.
*/
Object initDisplayMode(int mode, Object arg);
/**
* Set the location of the video with respect to
* the canvas where the video is displayed.
* <p>
* This method only works when the <code>USE_DIRECT_VIDEO</code>
* mode is set. In <code>USE_GUI_PRIMITIVE</code> mode,
* this call will be ignored.
* <p>
* The location is specified in pixel values relative to the
* upper left hand corner of the GUI object.
* <p>
* By default, video appears at location (0,0).
* <p>
* The location can be given in negative values or can be
* greater than the actual size of the canvas. When
* that happens, the video should be clipped to the
* boundaries of the canvas.
*
* @param x The x coordinate (in pixels) of the video location.
* @param y The y coordinate (in pixels) of the video location.
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
*/
void setDisplayLocation(int x, int y);
/**
* Return the X-coordinate of the video with respect
* to the GUI object where the video is displayed.
* The coordinate is specified in pixel values relative to the
* upper left hand corner of the GUI object.
* <p>
* The return value is undefined if <code>initDisplayMode</code>
* has not been called.
*
* @return the X-coordinate of the video.
*/
int getDisplayX();
/**
* Return the Y-coordinate of the video with respective
* to the GUI object where the video is displayed.
* The coordinate is specified in pixel values relative to the
* upper left hand corner of the GUI object.
* <p>
* The return value is undefined if <code>initDisplayMode</code>
* has not been called.
*
* @return the Y-coordinate of the video.
*/
int getDisplayY();
/**
* Show or hide the video.
* <p>
* If <code>USE_GUI_PRIMITIVE</code> is set, the video by
* default is shown when the GUI primitive is displayed.
* If <code>USE_DIRECT_VIDEO</code> is set, the video by
* default is not shown when the canvas is displayed
* until <code>setVisible(true)</code> is called. If
* the canvas is removed from the screen, the video
* will not be displayed.
*
* @param visible Show the video if true, hide it otherwise.
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
*/
void setVisible(boolean visible);
/**
* Resize the video image.
* <p>
* If the video mode is set to <code>USE_DIRECT_VIDEO</code>,
* setting the size of the video will not
* affect the size of the GUI object that the video is
* displayed.
* If the video is scaled to beyond the size of the
* GUI object, the video will be clipped.
* <p>
* If the video mode is set to <code>USE_GUI_PRIMITIVE</code>,
* Scaling the video will also scale the GUI object.
* <p>
* The actual scaling algorithm is left up
* to the underlying implementation. If
* the dimensions of the requested display size are smaller than
* the dimensions of the video clip, some implementations may
* choose to merely clip the video while other implementations
* may resize the video.
* <p>
* If the dimensions of the requested display size are bigger than
* the dimensions of the video clip, some implementations may
* resize the video while others may leave the video clip in the
* original size and just enlarge the display region. It is
* left up to the implementation
* where the video clip is placed in the display region in this
* instance (i.e., it can be in the center of the window or
* in a corner of the window).
*
* @param width Desired width (in pixels) of the display window
* @param height Desired height (in pixels) of the display window
* @exception IllegalArgumentException Thrown if the
* given <code>width</code> and <code>height</code> are
* non-positive values.
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
* @exception MediaException Thrown if resizing is not supported or
* the operation failed due to hardware or software limitations.
*/
void setDisplaySize(int width, int height)
throws MediaException;
/**
* Set the size of the render region for the video clip to be
* fullscreen. It is left up to the underlying implementation how
* fullscreen mode is
* implemented and what actual dimensions constitutes fullscreen.
* This is useful when the application does not know the actual
* width and height dimensions
* that are needed to make setDisplaySize(width, height) go to
* fullscreen mode.
* For example, on a device with a 400 pixel wide by 200 pixel
* high screen, a video
* clip that is 50 pixels wide by 100 pixels high in fullscreen
* mode may be
* 100 pixels wide by 200 pixels high if the underlying implementation
* wants
* to preserve the aspect ratio. In this case, an exception
* is not thrown.
* @param fullScreenMode Indicates whether or not to render
* in full screen mode
* @exception MediaException Thrown if resizing to full screen size
* is not supported.
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
*/
void setDisplayFullScreen(boolean fullScreenMode) throws MediaException;
/**
* Return the width of the source video. The
* width must be a positive number.
* @return the width of the source video
*/
int getSourceWidth();
/**
* Return the height of the source video. The
* height must be a positive number.
* @return the height of the source video
*/
int getSourceHeight();
/**
* Return the actual width of the current render video.
*
* @return width of the display video
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
*/
int getDisplayWidth();
/**
* Return the actual height of the current render video.
*
* @return height of the display video
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
*/
int getDisplayHeight();
/**
* Get a snapshot of the displayed content. Features and format
* of the captured image are specified by <code>imageType</code>.
* Supported formats can be queried from <code>System.getProperty</code>
* with
* <a href="../../../../overview-summary.html#video.snapshot.encodings">
* <code>video.snapshot.encodings</code></a> as the key.
* The first format in the supported list is the default capture format.
*
* @param imageType Format and resolution of the returned image.
* If <code>null</code> is given, the default capture format is used.
* @return image as a byte array in required format.
* @exception IllegalStateException Thrown if
* <code>initDisplayMode</code> has not been called.
* @exception MediaException Thrown if the requested format is
* not supported or the <code>Player</code> does not support
* snapshots.
* @exception SecurityException Thrown if the caller does
* not have the security permission to take the snapshot.
*/
byte[] getSnapshot(String imageType) throws MediaException;
}
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