ReQuest Multimedia VideoReQuest, Руководство по протоколу

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VideoReQuest Protocol Guide v1.1.2 - 5/18/04
Phone (518) 899-1254
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Fax (518) 899-1251
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www.request.com
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9 -
H a n d l i n g F e e d b a c k
Before the VideoReQuest will send feedback data, you must send a command to the
VideoReQuest that initializes communication. See
Initializing the Connection on Page 6 for
more information.
All feedback is formatted in the same manner as commands sent
TO the VideoReQuest. In
general, the format is as follows:
HEADER DATA
Marker Command
Type
Command
Subtype
Flags Data Size Chk
Sum
Data Chk Sum
FC h A0 h 0A h 1 Byte 00 h 00 h Byte 1 Byte 2 00 h 1+ Bytes 00 h
In this case, the
Subtype determines what data you are receiving (i.e. Movie Title, Genre,
etc) and the Data portion contains the actual data (i.e. the actual Movie Title, the actual
Genre name, etc). The length of the Data portion is determined by the 2 byte Data Size in
the Header.
For help understanding what each
Subtype is, see Appendix A .
Possible Subtypes:
Hex Integer Description Data Size
80 128 Browse window title (“Welcome”, “Total: 46”, etc) TBD
81 129 Browse List Title (Home, Genres, etc)* TBD
82 130 Browse Column 1 Header (Total) TBD
83 131 Browse Column 2 Header (Genre, Rating, etc) TBD
84 132 Browse Column 1 Data TBD
85 133 Browse Column 2 Data TBD
86 134 Browse List Size, Page UP/DOWN Flags and Cursor Position* 8
8A 138 Browse Long Description TBD
8B 139 Engine Mode 0: On Browse Page
1: On Player Page
2: DVD Pass-thru (Playing a movie)
2
8C 140 View Mode, Changer Number, Slot Number* 5
90 144 Browse Text Line 1* TBD
91 145 Browse Text Line 2* TBD
… … … …
9F 159 Browse Text Line 16* TBD
A0 160 Player Long Description (not used) TBD
A1 161 Player List Size, Page UP/DOWN Flags and Cursor Position (which chapter is
selected)*
8
A2 162 Player Movie Title TBD
A3 163 Player State 0: Stopped
1: Playing
2: Paused
2
A5 165 Player Window Title (“More Info”, “Chapters”) TBD
A6 166 Player Detail Headers* TBD
A7 167 Player Detail Text* TBD
A8 168 Player Mode (on Chapters or on Details)
0: Details
1: Chapters
2
A9 169 Player List Size, Page UP/DOWN Flags and Now Playing Cursor Position
(which chapter is playing)*
8
B0 176 Player Chapter Line 1 Text TBD
B1 177 Player Chapter Line 2 Text TBD
… … … …
BF 191 Player Chapter Line 16 Text TBD
* - Format of this data is explained on the next page under Special Data Formats