com.bramosystems.oss.player.core.client
Class PlayerUtil

java.lang.Object
  com.bramosystems.oss.player.core.client.PlayerUtil

public class PlayerUtil
extends Object

Utility class for various media player related functions.

Author:

Sikirulai Braheem

Constructor Summary

PlayerUtil()

Method Summary

static String	formatMediaTime(long milliSeconds) Formats the specified time (in milliseconds) into time string in the format hh:mm:ss.
static PluginVersion	getDivXPlayerPluginVersion() Detects the version of the DivX Web Player plugin available on the clients browser.
static PluginVersion	getFlashPlayerVersion() Detects the version of the Flash Player plugin available on the clients browser.
static com.google.gwt.user.client.ui.Widget	getMissingPluginNotice(Plugin plugin) Convenience method to get a widget that may be used to notify the user when a required plugin is not available.
static com.google.gwt.user.client.ui.Widget	getMissingPluginNotice(Plugin plugin, String version) Convenience method to get a widget that may be used to notify the user when a required plugin is not available.
static com.google.gwt.user.client.ui.Widget	getMissingPluginNotice(Plugin plugin, String title, String message, boolean asHTML) Returns a widget that may be used to notify the user when a required plugin is not available.
static AbstractMediaPlayer	getPlayer(PlayerInfo playerInfo, String mediaURL, boolean autoplay, String height, String width) Utility method to get the player with the specified playerInfo.
static AbstractMediaPlayer	getPlayer(Plugin plugin, String mediaURL, boolean autoplay) Utility method to get a player that best supports the specified mediaURL with the specified plugin feature.
static AbstractMediaPlayer	getPlayer(Plugin plugin, String mediaURL, boolean autoplay, String height, String width) Utility method to get a player that best supports the specified mediaURL with the specified plugin feature.
static AbstractMediaPlayer	getPlayer(String mediaURL, boolean autoplay, String height, String width) Utility method to get a player that best supports the specified mediaURL.
static PlayerInfo	getPlayerInfo(String providerName, String playerName) Returns the PlayerInfo object describing the features of the specified playerName from the specified providerName.
static Set<String>	getPlayerNames(String playerProvider) Returns the name of all players available from the specified playerProvider
static Set<String>	getPlayerProviderNames() Returns the name of all available player providers.
static PluginInfo	getPluginInfo(Plugin plugin) Returns the PluginInfo object describing the features of the specified plugin
static PluginVersion	getQuickTimePluginVersion() Detects the version of the QuickTime plugin available on the clients browser.
static PluginVersion	getVLCPlayerPluginVersion() Detects the version of the VLC Media Player plugin available on the clients browser.
static PluginVersion	getWindowsMediaPlayerPluginVersion() Detects the version of the Windows Media Player plugin available on the clients browser.
static boolean	isHTML5CompliantClient() Checks if the browser implements the HTML 5 specification.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PlayerUtil

public PlayerUtil()

Method Detail

formatMediaTime

public static String formatMediaTime(long milliSeconds)

Formats the specified time (in milliseconds) into time string in the format hh:mm:ss.

The hours part of the formatted time is omitted if milliseconds time is less than 60 minutes.

Parameters:

milliSeconds - media time to be formatted

Returns:

the formatted time as String

getPlayer

public static AbstractMediaPlayer getPlayer(String mediaURL,
                                            boolean autoplay,
                                            String height,
                                            String width)
                                     throws LoadException,
                                            PluginNotFoundException,
                                            PluginVersionException

Utility method to get a player that best supports the specified mediaURL.

A suitable player is determined based on the plugin available on the browser as well as its suitability to playback the specified media.

NOTE: If the media is served with a special streaming protocol such as MMS and RTSP, mediaURL should be specified in its absolute form. Otherwise mediaURL should end in a standard media format extension e.g. .mp3, .wma, .mov, .flv ...

Parameters:

mediaURL - the URL of the media to playback

autoplay - true to start playing automatically, false otherwise

height - the height of the player

width - the width of the player.

Returns:

a suitable player implementation

Throws:

LoadException - if an error occurs while loading the media.

PluginVersionException - if the required plugin version is not installed on the client.

PluginNotFoundException - if the required plugin is not installed on the client.

getPlayer

public static AbstractMediaPlayer getPlayer(Plugin plugin,
                                            String mediaURL,
                                            boolean autoplay,
                                            String height,
                                            String width)
                                     throws LoadException,
                                            PluginNotFoundException,
                                            PluginVersionException

Utility method to get a player that best supports the specified mediaURL with the specified plugin feature.

A suitable player is determined based on the features/capabilities derivable from the player plugin, its availability on the browser, and its suitability to playback the specified media.

The current implementation considers the following features:

• Plugin.Auto : Basic features i.e. ability to play, pause, stop e.t.c
• Plugin.PlaylistSupport : Playlist management features i.e. ability to add and/or remove media items from playlists
• Plugin.MatrixSupport : Matrix transformation features i.e. ability to perform such operations as rotation, traslation, skewing etc

NOTE: If the media is served with a special streaming protocol such as MMS and RTSP, mediaURL should be specified in its absolute form. Otherwise mediaURL should end in a standard media format extension e.g. .mp3, .wma, .mov, .flv ...

Parameters:

plugin - the features of the required player plugin

mediaURL - the URL of the media to playback

autoplay - true to start playing automatically, false otherwise

height - the height of the player

width - the width of the player.

Returns:

a suitable player implementation

Throws:

LoadException - if an error occurs while loading the media.

PluginVersionException - if the required plugin version is not installed on the client.

PluginNotFoundException - if the required plugin is not installed on the client.

Since:

1.0

See Also:

getPlayer(String, boolean, String, String)

getPlayer

public static AbstractMediaPlayer getPlayer(Plugin plugin,
                                            String mediaURL,
                                            boolean autoplay)
                                     throws LoadException,
                                            PluginNotFoundException,
                                            PluginVersionException

Utility method to get a player that best supports the specified mediaURL with the specified plugin feature.

Parameters:

plugin - the features of the required player plugin

mediaURL - the URL of the media to playback

autoplay - true to start playing automatically, false otherwise

Returns:

a suitable player implementation

Throws:

LoadException - if an error occurs while loading the media.

PluginVersionException - if the required plugin version is not installed on the client.

PluginNotFoundException - if the required plugin is not installed on the client.

Since:

1.1

See Also:

getPlayer(Plugin, String, boolean, String, String)

getFlashPlayerVersion

public static PluginVersion getFlashPlayerVersion()
                                           throws PluginNotFoundException

Detects the version of the Flash Player plugin available on the clients browser.

Returns:

PluginVersion object wrapping the version numbers of the Flash Player on the browser.

Throws:

PluginNotFoundException - if a Flash Player plugin could not be found (especially if none is installed or the plugin is disabled).

getQuickTimePluginVersion

public static PluginVersion getQuickTimePluginVersion()
                                               throws PluginNotFoundException

Detects the version of the QuickTime plugin available on the clients browser.

Returns:

PluginVersion object wrapping the version numbers of the QuickTime plugin on the browser.

Throws:

PluginNotFoundException - if a QuickTime plugin could not be found. (especially if none is installed or the plugin is disabled).

getWindowsMediaPlayerPluginVersion

public static PluginVersion getWindowsMediaPlayerPluginVersion()
                                                        throws PluginNotFoundException

Detects the version of the Windows Media Player plugin available on the clients browser.

Returns:

PluginVersion object wrapping the version numbers of the plugin on the browser.

Throws:

PluginNotFoundException - if a plugin could not be found. (especially if none is installed or the plugin is disabled).

getVLCPlayerPluginVersion

public static PluginVersion getVLCPlayerPluginVersion()
                                               throws PluginNotFoundException

Detects the version of the VLC Media Player plugin available on the clients browser.

Returns:

PluginVersion object wrapping the version numbers of the plugin on the browser.

Throws:

PluginNotFoundException - if a plugin could not be found. (especially if none is installed or the plugin is disabled).

Since:

1.0

getDivXPlayerPluginVersion

public static PluginVersion getDivXPlayerPluginVersion()
                                                throws PluginNotFoundException

Detects the version of the DivX Web Player plugin available on the clients browser.

Returns:

PluginVersion object wrapping the version numbers of the plugin on the browser.

Throws:

PluginNotFoundException - if a plugin could not be found. (especially if none is installed or the plugin is disabled).

Since:

1.2

getMissingPluginNotice

public static com.google.gwt.user.client.ui.Widget getMissingPluginNotice(Plugin plugin,
                                                                          String title,
                                                                          String message,
                                                                          boolean asHTML)

Returns a widget that may be used to notify the user when a required plugin is not available. The widget provides a link to the plugin download page.

CSS Style Rules

• .player-MissingPlugin { the missing plugin widget }
• .player-MissingPlugin-title { the title section }
• .player-MissingPlugin-message { the message section }

Parameters:

plugin - the missing plugin

title - the title of the message

message - descriptive message to notify user about the missing plugin

asHTML - true if message should be interpreted as HTML, false otherwise.

Returns:

missing plugin widget.

Since:

0.6

getMissingPluginNotice

public static com.google.gwt.user.client.ui.Widget getMissingPluginNotice(Plugin plugin,
                                                                          String version)

Convenience method to get a widget that may be used to notify the user when a required plugin is not available.

This is same as calling getMissingPluginNotice(plugin, "Missing Plugin", "<<message>>", false)
<<message>> => [Plugin Name] [version] or later is required to play this media. Click here to get [Plugin Name]

Parameters:

plugin - the required plugin

version - the minimum version of the required plugin

Returns:

missing plugin widget.

Since:

0.6

See Also:

getMissingPluginNotice(Plugin, String, String, boolean)

getMissingPluginNotice

public static com.google.gwt.user.client.ui.Widget getMissingPluginNotice(Plugin plugin)

Convenience method to get a widget that may be used to notify the user when a required plugin is not available.

This is same as calling getMissingPluginNotice(plugin, "Missing Plugin", "<<message>>", false)
<<message>> => [Plugin Name] is required to play this media. Click here to get [Plugin Name]

Parameters:

plugin - the required plugin

Returns:

missing plugin widget.

Since:

0.6

See Also:

getMissingPluginNotice(Plugin, String, String, boolean)

isHTML5CompliantClient

public static boolean isHTML5CompliantClient()

Checks if the browser implements the HTML 5 specification.

Returns:

true if browser is HTML 5 compliant, false otherwise

Since:

1.1

getPluginInfo

public static PluginInfo getPluginInfo(Plugin plugin)
                                throws PluginNotFoundException

Returns the PluginInfo object describing the features of the specified plugin

Parameters:

plugin - the plugin

Returns:

PluginInfo object

Throws:

PluginNotFoundException - if the specified plugin is not available

Since:

1.3

See Also:

PluginInfo

getPlayerProviderNames

public static Set<String> getPlayerProviderNames()

Returns the name of all available player providers.

Returns:

names of player providers

Since:

1.3

getPlayerNames

public static Set<String> getPlayerNames(String playerProvider)

Returns the name of all players available from the specified playerProvider

Parameters:

playerProvider - the name of the player provider

Returns:

names of available players

Throws:

IllegalArgumentException - if playerProvider is not registered

Since:

1.3

getPlayerInfo

public static PlayerInfo getPlayerInfo(String providerName,
                                       String playerName)

Returns the PlayerInfo object describing the features of the specified playerName from the specified providerName.

Parameters:

providerName - name of the player provider

playerName - name of player

Returns:

the PlayerInfo object

Throws:

IllegalArgumentException - if providerName and/or playerName is not available

Since:

1.3

See Also:

PlayerInfo

getPlayer

public static AbstractMediaPlayer getPlayer(PlayerInfo playerInfo,
                                            String mediaURL,
                                            boolean autoplay,
                                            String height,
                                            String width)
                                     throws LoadException,
                                            PluginNotFoundException,
                                            PluginVersionException

Utility method to get the player with the specified playerInfo.

This method acts as a factory to instantiate player widgets from various providers.

Parameters:

playerInfo - the required player widget

mediaURL - the URL of the media to playback

autoplay - true to start playing automatically, false otherwise

height - the height of the player

width - the width of the player.

Returns:

the player implementation

Throws:

LoadException - if an error occurs while loading the media.

PluginVersionException - if the required plugin version is not installed on the client.

PluginNotFoundException - if the required plugin is not installed on the client.

Since:

1.3

See Also:

getPlayer(String, boolean, String, String)