Vela CineCast 2000-0422, Installation And User Manual

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60 CineCast Quad Pro Version 2.6 Installation and User Manual
MPEG PLAY Command
host is not sending data fast enough to keep up with the playback rate. This is a
fatal playback error, in which the decoder is informing the host system that play-
back has stopped. The decoder will return the following on the next
WRITE
(10):
A
RESET BUFFER
command, new data [via
WRITE
(10)], and a new
MPEG PLAY
command are required before playback can start again.
When set to 1, the decoder will automatically enter a Pause state when the
decoder detects that the DRAM buffer is empty. The decoder will wait for eight
64-K buffers to be filled before resuming playback. This mode requires that a
RESET BUFFER
be sent at the end of a stream, so the decoder knows the differ-
ence between the data underflow and the end of a stream. Also, the decoder
keeps a count of the number of times this data underrun condition occurs.
Refer to Mode Page (30h).
Mid-Stream Start (Midstrm)
By setting this bit to 1, the decoder will automatically find the first valid sequence
header before starting playback. This allows the start of playback in a random
position within an MPEG file. (This feature may delay video start-up by a few
frames. The end result will be more black between back-to-back videos.)
Autodetect must be used with mid-stream starts. By setting this bit to 0, the
decoder assumes that the MPEG stream begins on a valid sequence header.
Automatic Pause on First Visible Frame (Pause)
When this bit is set to 1, the decoder begins playback, but automatically pauses
on the first non-black video frame. This depends on the value of Pre-Black. Once
paused, use the
DECODER
(45
H
) command with code 0012h to resume from
pause. Alternatively, the
F
RAME ADVANCE
(010
F
) command can be used to
advance one video frame.
Trigger
When this bit is set to 1, the decoder waits for the trigger event (as defined in Trigger
Event) to occur before beginning playback.
SCSI Status Check Condition
Sense Key 03h Medium Error
Additional Sense Code and Qualifier 0005h End-of-Data Detected
Stream Type Hex Code
Autodetect 00h