Author: michael
Date: Fri Nov 3 14:52:12 2006
New Revision: 20634
Modified:
trunk/DOCS/tech/nut.txt
Log:
move file up so its found first, this probably improves
readability
Modified: trunk/DOCS/tech/nut.txt
============================================================
==================
--- trunk/DOCS/tech/nut.txt (original)
+++ trunk/DOCS/tech/nut.txt Fri Nov 3 14:52:12 2006
 -116,6
+116,54
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
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:
----------------
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