From 322d669cecd8379f9eed5d8a9203abc4cd23d749 Mon Sep 17 00:00:00 2001
From: ods15 <ods15@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Fri, 20 Jan 2006 19:06:28 +0000
Subject: bump date add EOR add coded stream flags

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17438 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 DOCS/tech/mpcf.txt | 62 ++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 42 insertions(+), 20 deletions(-)

(limited to 'DOCS/tech')

diff --git a/DOCS/tech/mpcf.txt b/DOCS/tech/mpcf.txt
index d7cf7c78dc..58c2368c85 100644
--- a/DOCS/tech/mpcf.txt
+++ b/DOCS/tech/mpcf.txt
@@ -1,5 +1,5 @@
 ========================================
-NUT Open Container Format DRAFT 20060105
+NUT Open Container Format DRAFT 20060120
 ========================================
 
 
@@ -131,23 +131,29 @@ main header:
     stream_count                        v
     max_distance                        v
     max_index_distance                  v
+    tmp_pts=0
+    tmp_mul=1
+    tmp_stream=0
     for(i=0; i<256; ){
         tmp_flag                        v
         tmp_fields                      v
-        if(tmp_fields>0) tmp_pts        s
-        if(tmp_fields>1) tmp_mul        v
-        if(tmp_fields>2) tmp_stream     v
-        if(tmp_fields>3) tmp_size       v
+        if(tmp_fields>0) tmp_sflag      v
+        else tmp_sflag=0
+        if(tmp_fields>1) tmp_pts        s
+        if(tmp_fields>2) tmp_mul        v
+        if(tmp_fields>3) tmp_stream     v
+        if(tmp_fields>4) tmp_size       v
         else tmp_size=0
-        if(tmp_fields>4) tmp_res        v
+        if(tmp_fields>5) tmp_res        v
         else tmp_res=0
-        if(tmp_fields>5) count          v
+        if(tmp_fields>6) count          v
         else count= tmp_mul - tmp_size
-        for(j=6; j<tmp_fields; j++){
+        for(j=7; j<tmp_fields; j++){
             tmp_reserved[i]             v
         }
         for(j=0; j<count && i<256; j++, i++){
             flags[i]= tmp_flag;
+            stream_flags[i]= tmp_sflag;
             stream_id_plus1[i]= tmp_stream;
             data_size_mul[i]= tmp_mul;
             data_size_lsb[i]= tmp_size + j;
@@ -208,6 +214,9 @@ frame:
     if(flags[frame_code]&1){
         data_size_msb                   v
     }
+    if(flags[frame_code]&2){
+        coded_stream_flags              v
+    }
     for(i=0; i<reserved_count[frame_code]; i++)
         reserved                        v
     data
@@ -302,6 +311,8 @@ back_ptr
     one keyframe for each stream lies between the syncpoint to which
     real_back_ptr points, and the current syncpoint.
 
+    A stream where EOR is set is to be ignored for back_ptr.
+
 global_key_pts
     After a syncpoint, last_pts of each stream is to be set to:
     last_pts[i] = convert_ts(global_key_pts, timebase[stream], timebase[i])
@@ -417,17 +428,27 @@ frame_code
     different from the first byte of any startcode
 
 flags[frame_code]
-    first of the flags from MSB to LSB are called KD
-    if D is 1 then data_size_msb is coded, otherwise data_size_msb is 0
-    K is the keyframe_type
-        0 -> no keyframe,
-        1 -> keyframe,
-    flags=4 can be used to mark illegal frame_code bytes
-    frame_code=78 must have flags=4
-    Note: frames MUST NOT depend(1) upon frames prior to the last
-          frame_startcode
-    Important: depend(1) means dependency on the container level (NUT) not
-    dependency on the codec level
+    Bit  Name             Description
+      1  data_size_msb    if set, data_size_msb is at frame header,
+                          otherwise data_size_msb is 0
+      2  more_flags       if set, stream control flags are at frame header.
+      4  invalid          if set, frame_code is invalid.
+
+    frame_code=78 ('N') MUST have flags=64
+
+stream_flags
+    stream_flags is "stream_flags[frame_code] ^ coded_stream_flags"
+
+    Bit  Name               Description
+      1  is_key             if set, frame is keyframe
+      2  end_of_relevance   if set, stream has no relevance on
+                            presentation. (EOR)
+
+    EOR frames MUST be zero-length and must be set keyframe.
+    All streams SHOULD end with EOR, where the pts of the EOR indicates the
+    end presentation time of the final frame.
+    An EOR set stream is unset by the first content frames.
+    When an EOR is unset, dts_cache of the stream is reset to -1.
 
 stream_id_plus1[frame_code]
     must be <250
@@ -476,7 +497,8 @@ dts
     this buffer is initalized with decode_delay -1 elements
 
     Pts of all frames in all streams MUST be bigger or equal to dts of all
-    previous frames in all streams, compared in common timebase.
+    previous frames in all streams, compared in common timebase. (EOR
+    frames are NOT exempt from this rule)
 
 width/height
     MUST be set to the coded width/height
-- 
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