Av:Developer:InfoService - Revision history

Johnh: /* State Variables */ added description of remaining state variables

2013-08-07T13:34:37Z

State Variables: added description of remaining state variables

← Older revision		Revision as of 13:34, 7 August 2013
Line 34:		Line 34:
	= State Variables =		= State Variables =
	== TrackCount ==		== TrackCount ==
-	the strictly monotonically increasing integer number of ~~track~~ played (incl. current one)	+	the strictly monotonically increasing integer number of tracks played (incl. current one)

	== DetailsCount ==		== DetailsCount ==
		+	the strictly monotonically increasing integer number versioning changes in track encoding parameters (duration, bitrate, bitdepth, samplerate, lossy compression, codec); reset to zero on each track change
		+
	== MetatextCount ==		== MetatextCount ==
		+	the strictly monotonicallyl increasing integer number versioning changes in any text associated with the currently playing track; reset to zero on each track change
		+
	== Uri ==		== Uri ==
		+	the Universal Resource Indicator, indicating the currently playing track; initially empty string
		+
	== Metadata ==		== Metadata ==
		+	the DIDL-Lite encoded string of information about the currently playing track (e.g. artist, album, year, etc.); initially empty string
		+
	== Duration ==		== Duration ==
		+	the length of the currently playing track in seconds
		+
	== BitRate ==		== BitRate ==
		+	the dataflow rate in bits per second of the currently playing track in its encoded representation(XXX)
		+	XXX MP3: CBR vs. VBR
		+
	== BitDepth ==		== BitDepth ==
		+	the sample (data) resolution in bits per channel sample of the currently playing track
		+
	== SampleRate ==		== SampleRate ==
		+	the time resolution of samples per second in kHz of the currently playing track
		+
	== Lossless ==		== Lossless ==
		+	the indication of whether the currently playing track can be decoded (decompressed) to a bit-accurate representation of the original audio data (lossless) or merely to a good approximation (lossy encoding)
		+
	== CodecName ==		== CodecName ==
		+	the shorthand name for the audio encoding and container format used to represent the currently playing track (e.g. AAC); initially empty string
		+
	== Metatext ==		== Metatext ==
		+	the additional textual information (if any) associated with the currently playing track

	= Technical Details =		= Technical Details =

Johnh: /* TrackCount */ described TrackCount

2013-08-06T13:48:46Z

TrackCount: described TrackCount

← Older revision		Revision as of 13:48, 6 August 2013
Line 34:		Line 34:
	= State Variables =		= State Variables =
	== TrackCount ==		== TrackCount ==
		+	the strictly monotonically increasing integer number of track played (incl. current one)
		+
	== DetailsCount ==		== DetailsCount ==
	== MetatextCount ==		== MetatextCount ==

Johnh: added section on State Variables

2013-08-06T13:37:36Z

added section on State Variables

← Older revision		Revision as of 13:37, 6 August 2013
Line 31:		Line 31:

	This currently amounts to broadcast information from Internet radio stations, but the same mechanism could be used for other purposes in the future.		This currently amounts to broadcast information from Internet radio stations, but the same mechanism could be used for other purposes in the future.
		+
		+	= State Variables =
		+	== TrackCount ==
		+	== DetailsCount ==
		+	== MetatextCount ==
		+	== Uri ==
		+	== Metadata ==
		+	== Duration ==
		+	== BitRate ==
		+	== BitDepth ==
		+	== SampleRate ==
		+	== Lossless ==
		+	== CodecName ==
		+	== Metatext ==

	= Technical Details =		= Technical Details =

Johnh: /* Metatext */ fixed capitalisation

2013-08-06T13:23:10Z

Metatext: fixed capitalisation

← Older revision		Revision as of 13:23, 6 August 2013
Line 30:		Line 30:
	Reports dynamic textual information concerning the current media.		Reports dynamic textual information concerning the current media.

-	This currently amounts to broadcast information from ~~internet~~ radio stations, but the same mechanism could be used for other purposes in the future.	+	This currently amounts to broadcast information from Internet radio stations, but the same mechanism could be used for other purposes in the future.

	= Technical Details =		= Technical Details =

Johnh: /* Track */ fixed capitalisation

2013-08-06T13:22:05Z

Track: fixed capitalisation

← Older revision		Revision as of 13:22, 6 August 2013
Line 15:		Line 15:
	==Track==		==Track==
	Reports current track information concerning the current media:		Reports current track information concerning the current media:
-	*~~Uri~~	+	*URI
	*Metadata		*Metadata

Johnh: /* Counters */ minor reordering and rewording

2013-08-06T13:20:40Z

Counters: minor reordering and rewording

← Older revision		Revision as of 13:20, 6 August 2013
Line 5:		Line 5:
	= Actions =		= Actions =
	==Counters==		==Counters==
-	Counters are used to ~~manage the changing of the~~ Track, Details, and Metatext information.	+	Counters are used to version Track, Details, and Metatext information in the face of dynamic changes.

-	~~When a track changes, the Track Count is incremented, the Uri and Metadata~~ are ~~set, the Details Count is set~~ to ~~zero, the Details are defaulted~~ to ~~blank and zero values,~~ the ~~Metatext Count is set to zero, and~~ the ~~Metatext is set to blank~~.	+	The Counters action can be used by clients that are unable to partake in UPnP eventing in order to track changes in the information provided by the Info Service.

-	~~Subsequent updates~~ to the Details and Metatext ~~are accompanied by increments in their respective Counters~~.	+	When a track changes, the Track Count is incremented, the URI and Metadata are set, the Details Count is set to zero, the Details are defaulted to blank and zero values, the Metatext Count is set to zero, and the Metatext is set to blank.

-	~~The Counters action can be used by clients that are unable~~ to ~~partake in UPnP eventing in order to establish changes in~~ the ~~information provided~~ by ~~the Info Service~~.	+	Subsequent updates to the Details and Metatext are accompanied by increments in their respective Counters.

	==Track==		==Track==

Johnh: /* Overview */ minor edit

2013-08-06T13:13:56Z

Overview: minor edit

← Older revision		Revision as of 13:13, 6 August 2013
Line 1:		Line 1:
	= Overview =		= Overview =

-	The Info service provides information concerning the currently playing media. The information provided is based on the concept of a track, which has a ~~uri~~ and metadata in DIDL-Lite format. Some time after the track changes further information becomes available such as the bit-rate, sample-rate, bit-depth, etc. Optionally a track may contain dynamic textual information (known as metatext) that is updated as the track is played. Metatext is typically used to convey broadcast information from ~~internet~~ radio stations.	+	The Info service provides information concerning the currently playing media. The information provided is based on the concept of a track, which has a URI and metadata in DIDL-Lite format. Some time after the track changes further information becomes available such as the bit-rate, sample-rate, bit-depth, etc. Optionally a track may contain dynamic textual information (known as metatext) that is updated as the track is played. Metatext is typically used to convey broadcast information from Internet radio stations.

	= Actions =		= Actions =

Simonc: /* Architectural Overview */

2013-08-02T10:58:27Z

Architectural Overview

← Older revision		Revision as of 10:58, 2 August 2013
Line 1:		Line 1:
-	= ~~Architectural~~ Overview =	+	= Overview =

	The Info service provides information concerning the currently playing media. The information provided is based on the concept of a track, which has a uri and metadata in DIDL-Lite format. Some time after the track changes further information becomes available such as the bit-rate, sample-rate, bit-depth, etc. Optionally a track may contain dynamic textual information (known as metatext) that is updated as the track is played. Metatext is typically used to convey broadcast information from internet radio stations.		The Info service provides information concerning the currently playing media. The information provided is based on the concept of a track, which has a uri and metadata in DIDL-Lite format. Some time after the track changes further information becomes available such as the bit-rate, sample-rate, bit-depth, etc. Optionally a track may contain dynamic textual information (known as metatext) that is updated as the track is played. Metatext is typically used to convey broadcast information from internet radio stations.

Openhome at 15:15, 5 May 2011

2011-05-05T15:15:48Z

← Older revision		Revision as of 15:15, 5 May 2011
Line 40:		Line 40:

	== Info Service Description (XML) ==		== Info Service Description (XML) ==
-	<~~code~~>	+	<syntaxhighlight lang="xml">
	<?xml version="1.0" encoding="utf-8"?>		<?xml version="1.0" encoding="utf-8"?>
	<scpd xmlns="urn:schemas-upnp-org:service-1-0">		<scpd xmlns="urn:schemas-upnp-org:service-1-0">
Line 180:		Line 180:
	</serviceStateTable>		</serviceStateTable>
	</scpd>		</scpd>
-	</~~code~~>	+	</syntaxhighlight>

Joshh: /* Info Service Description (XML) */

2011-05-05T14:09:32Z

Info Service Description (XML)

← Older revision		Revision as of 14:09, 5 May 2011
Line 180:		Line 180:
	</serviceStateTable>		</serviceStateTable>
	</scpd>		</scpd>
-
-
	</code>		</code>