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move file up so its found first, this probably improves readability

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20634 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2006-11-03 13:52:12 +00:00
parent b0890999db
commit 0daf53d611
1 changed files with 48 additions and 47 deletions
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95
DOCS/tech/nut.txt
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@ -116,6 +116,54 @@ t (v coded universal timestamp)
Bitstream syntax:
=================
file:
file_id_string
while(!eof){
if(next_byte == 'N'){
packet_header
switch(startcode){
case main_startcode: main_header; break;
case stream_startcode:stream_header; break;
case info_startcode: info_packet; break;
case index_startcode: index; break;
case syncpoint_startcode: syncpoint; break;
}
packet_footer
}else
frame
}
the structure of a undamaged file should look like the following, but
demuxers should be flexible and be able to deal with damaged headers so the
above is a better loop in practice (not to mention its simpler)
note, demuxers MUST be able to deal with new and unknown headers
file:
file_id_string
while(!eof){
packet_header, main_header, packet_footer
reserved_headers
for(i=0; i<stream_count; i++){
packet_header, stream_header, packet_footer
reserved_headers
}
while(next_code == info_startcode){
packet_header, info_packet, packet_footer
reserved_headers
}
if(next_code == index_startcode){
packet_header, index_packet, packet_footer
}
if (!eof) while(next_code != main_startcode){
if(next_code == syncpoint_startcode){
packet_header, syncpoint, packet_footer
}
frame
reserved_headers
}
}
Common elements:
----------------
@ -319,53 +367,6 @@ syncpoint:
Complete definition:
file:
file_id_string
while(!eof){
if(next_byte == 'N'){
packet_header
switch(startcode){
case main_startcode: main_header; break;
case stream_startcode:stream_header; break;
case info_startcode: info_packet; break;
case index_startcode: index; break;
case syncpoint_startcode: syncpoint; break;
}
packet_footer
}else
frame
}
the structure of a undamaged file should look like the following, but
demuxers should be flexible and be able to deal with damaged headers so the
above is a better loop in practice (not to mention its simpler)
note, demuxers MUST be able to deal with new and unknown headers
file:
file_id_string
while(!eof){
packet_header, main_header, packet_footer
reserved_headers
for(i=0; i<stream_count; i++){
packet_header, stream_header, packet_footer
reserved_headers
}
while(next_code == info_startcode){
packet_header, info_packet, packet_footer
reserved_headers
}
if(next_code == index_startcode){
packet_header, index_packet, packet_footer
}
if (!eof) while(next_code != main_startcode){
if(next_code == syncpoint_startcode){
packet_header, syncpoint, packet_footer
}
frame
reserved_headers
}
}
Tag description:
----------------