Specifications

Windows Embedded Automotive 7 Deep Dive: Phone Core and Media Core 80
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AutoMediaCore\Config
Key Value
Type
Description
AllowableUsedSpace
DWORD
The threshold at which Windows Embedded Automotive dumps the old
index because it contains too much stale information. This value is used
when multiple Quick Scans are performed on the index. The default value is
A (10).
SpaceDifference
DWORD
The space difference between two indexes. This is used to determine
whether the current index is a possible match for a previously built index.
This value is expressed in a percentage of space difference between two
indexes, and accounts for changes that are made to the index—such as
adding a new album—that result in space differences.
Lower percentage values for this entry increase the constraints and are
used to determine whether the indexes are the same. For example, if the
percentage is changed from 10 percent to 5 percent, the probability that
two indexes will be considered from the same device will decrease. The
default value is 10 percent.
FileCheckDuration
DWORD
The amount of time that Media Core looks for files to determine whether
the new disk is the same disk that was seen last time. The default value is
0x07D0 (2 seconds).
IdleDelay
DWORD
The amount of time to wait after a speech idle (SSN_IDLE) message is
posted before Media Core resumes playback. The default value is 0x01C0
(448 milliseconds).
MaxIndexedSourceCount
DWORD
The maximum number of RAM sources, also known as full sources. These
contain full sets of metadata. This controls the number of concurrently
available supported devices. The default value is 5.
MaxCncCount
DWORD
The maximum number of command-and-control devices that are
supported. Be aware that these sources are not persisted so this is the
number of concurrent sources. A Bluetooth music device is an example of a
command-and-control device. The default value is 1.
MaxPersistedCount
DWORD
The maximum number of full sources that are persisted to flash memory.
The default value is 6.
ExtraDataCacheSize
DWORD
The maximum size of the extra data table in bytes. The default value is 1.3
MB, which is enough for 86,000 GUIDs. The default value is 150,000 (1.3
MB).
StringHashSize
DWORD
The number of pages to allocate each string metadata hash table (for
Genre, Title, Artist, Album, and so on). The default value is 2.
FileHashSize
DWORD
The number of pages to allocate for the file hash table. The default value is
10 pages.
ExtraHashSize
DWORD
The number of pages to allocate for the extra hash table. The default value
is 2 pages.
VideoSupport
DWORD
Whether Media Core can play video from video-enabled media files. The
default value is 0 (no video).