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add EOR
add coded stream flags


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17438 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
ods15 2006-01-20 19:06:28 +00:00
parent 3cb89b0765
commit 322d669cec
1 changed files with 42 additions and 20 deletions
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62
DOCS/tech/mpcf.txt
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@ -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