Cache Control - Revision history

SMIL T.A.: /* cacheControl */

2013-06-03T10:34:50Z

‎cacheControl

SMIL T.A.: /* cacheControl */

2013-06-03T10:34:31Z

‎cacheControl

SMIL T.A.: /* systemCache */

2013-06-03T10:33:28Z

‎systemCache

SMIL T.A.: /* systemCache */

2013-06-03T10:32:26Z

‎systemCache

SMIL T.A.: /* systemCache */

2013-06-03T10:32:04Z

‎systemCache

SMIL T.A.: Created page with 'A-SMIL features 2 methods , "systemCache" property and "cacheControl" parameter to manage player's playback behavior regarding to player's local cache status. ==systemCache== F...'

2013-06-03T10:31:17Z

Created page with 'A-SMIL features 2 methods , "systemCache" property and "cacheControl" parameter to manage player's playback behavior regarding to player's local cache status. ==systemCache== F...'

New page

A-SMIL features 2 methods , "systemCache" property and "cacheControl" parameter to manage player's playback behavior regarding to player's local cache status.

==systemCache==

First is systemCache which is defining conditions whether a media item should be played based on the player's local cache.
Below example illustrates the usage and condition of systemCache.

Precondition of this example -
dummy1.jpg exists in player's local cache by previous successful download , instead dummy2.jpg and dummy3.jpg aren't avaialble from previous download.

<source lang="smil">
<seq repeatCount="indefinite">
<img src="http://foo.com/dummy1.jpg" dur="7s" /> 
<img src="http://foo.com/dummy2.jpg" dur="7s" /> 
<img src="http://foo.com/dummy3.jpg" dur="7s" systemCache="http://foo.com/dummy3.jpg" /> 
</seq>
</source>

==cacheControl==

CacheControl parameter is defining conditions regarding which copy to be played , whether from local cache or from server.

A-SMIL defines 3 different cacheControl behavior as below :

*auto (default)
Play local cached content or stream from the server.
*onlyIfCached
Content is played only if it is cached locally.
*noCache
Content is always revalidated with origin server.

Below example illustrates the usage and condition of cacheControl parameter.

Precondition of this example -
dummy1.jpg exists in player's local cache by previous successful download, instead dummy2.jpg is not available in cache from previous download.

<source lang="smil">
<seq repeatCount="indefinite">
<img src="http://foo.com/dummy1.jpg" dur="7s"> 
</img>
<img src="http://foo.com/dummy1.jpg" dur="7s">
<param name="cacheControl" value="auto"/> 
</img>
<img src="http://foo.com/dummy1.jpg" dur="7s">
<param name="cacheControl" value="onlyIfCached"/> 
</img>
<img src="http://foo.com/dummy1.jpg" dur="7s">
<param name="cacheControl" value="noCache"/> 
</img>
<img src="http://foo.com/dummy2.jpg" dur="7s"> 
<param name="cacheControl" value="onlyIfCached"/>
</img>
</seq>
</source>

@@ Line 53: / Line 53: @@
    <img src="http://foo.com/dummy2.jpg" dur="7s">   <!-- player has no local cache content to play from , player wait 7 seconds
   to play next item -->
-		<param name="cacheControl" value="onlyIfCached"/>
+	   <param name="cacheControl" value="onlyIfCached"/>
    </img>
    </seq>
 </source>

@@ Line 48: / Line 48: @@
    </img>
    <img src="http://foo.com/dummy1.jpg" dur="7s">
-	   <param name="cacheControl" value="noCache"/>  <!-- Player download from server again and play, instead of playing from local cache -->
+	   <param name="cacheControl" value="noCache"/>  <!-- Player download from server again and play, instead of playing
    </img>
-   <img src="http://foo.com/dummy2.jpg" dur="7s">   <!-- player has no local cache content to play from , player wait 7 seconds to play next item -->
+   <img src="http://foo.com/dummy2.jpg" dur="7s">   <!-- player has no local cache content to play from , player wait 7 seconds
 		<param name="cacheControl" value="onlyIfCached"/>
    </img>
    </seq>
 </source>

@@ Line 15: / Line 15: @@
    <img src="http://foo.com/dummy2.jpg" dur="7s" />  <!-- player has no media to play , player wait 7 seconds to play next item -->
    <img src="http://foo.com/dummy3.jpg" dur="7s" systemCache="http://foo.com/dummy3.jpg" /> <!-- player has no media to play
-  , player skipped and start next item playback immediately -->
+  , player skip this playback and start next item playback immediately -->
 </seq>
 </source>

← Older revision		Revision as of 10:32, 3 June 2013
Line 4:		Line 4:

	First is systemCache which is defining conditions whether a media item should be played based on the player's local cache.		First is systemCache which is defining conditions whether a media item should be played based on the player's local cache.
		+
	Below example illustrates the usage and condition of systemCache.		Below example illustrates the usage and condition of systemCache.