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some typos

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info_header -> info_packet
adding variable sized reserved_bytes where i forgot it
start/end time in the info_packet
stuffing_packet


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9311 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2003-02-07 09:48:06 +00:00
parent 40aaadd9f8
commit 1de44c5cde
1 changed files with 38 additions and 8 deletions
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46
DOCS/tech/mpcf.txt
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@ -72,7 +72,7 @@ main header:
version v
stream_count v
file_size v
length_in msec v
length_in_msec v
reserved_bytes
checksum u(32)
@ -144,18 +144,27 @@ Index:
index_timestamp v
index_position v
}
reserved_bytes
checksum u(32)
info_header: (optional)
info_packet: (optional)
packet header
info_startcode f(64)
start_time v
end_time v
entry_count v
for(i=0; i<entry_count; i++){
name sz
value sz
}
reserved_bytes
checksum u(32)
stuffing_packet: (optional)
packet_header
stuffing_startcode f(64)
for(i=0; i<forward_ptr - length_of_non_reserved; i++)
stuffing f(8)
forward_ptr
backward_ptr
@ -281,6 +290,10 @@ index_position
position in bytes of the first byte of the keyframe header, relative
to the last index_position
start_time, stop_time
the time range in msecs to which the info applies
Note: can be used to mark chapters
name
the name of the info entry, valid names are
"Author","Description","Copyright","Encoder","Title"
@ -289,7 +302,8 @@ name
value
stuffing
0xFF
Structure:
@ -307,11 +321,27 @@ headers may be repated, but if they are then they MUST all be repeated together
and repeated headers MUST be identical
headers MUST be repeated every 10sec at least ? FIXME
headers MUST be repeated at least twice (so they exist 3 times in a file)
Index
the index can be repeated but there MUST be at least one at the end
Info packets
the info_packet can be repeated, it can also contain different names & values
each time but only if allso the time is different
Info packets can be used to describe the file or some part of it (chapters)
info packets, SHOULD be placed at the begin of the file at least
for realtime streaming info packets will normally be transmitted when they apply
for example, the current song title & artist of the currently shown music video
Stuffing packets
can be used as a filler, for example to leave some empty space at the begin for
a copy of the index
Unknown packets
MUST be ignored by the decoder
the info_header can be repeated, it can also contain different names & values
each time
Sample code (GPL, & untested)
typedef BufferContext{