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simplify flags

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17719 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2006-03-03 22:30:17 +00:00
parent 99cb97975c
commit 608b2793cd
1 changed files with 16 additions and 22 deletions
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38
DOCS/tech/mpcf.txt
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@ -131,8 +131,6 @@ main header:
for(i=0; i<256; ){
tmp_flag v
tmp_fields 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
@ -147,12 +145,11 @@ main header:
}
for(j=0; j<count && i<256; j++, i++){
if (i == 'N') {
flags[i]= 4;
flags[i]= FLAG_INVALID;
j--;
continue;
}
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;
@ -195,15 +192,17 @@ frame:
if(pts_delta[frame_code]==0){
coded_pts v
}
if(flags[frame_code]&1){
data_size_msb v
frame_flags= flags[frame_code]
if(frame_flags&FLAG_CODED){
coded_flags v
frame_flags ^= coded_flags
}
if(flags[frame_code]&2){
coded_stream_flags v
if(frame_flags&FLAG_SIZE_MSB){
data_size_msb v
}
for(i=0; i<reserved_count[frame_code]; i++)
reserved v
if(stream_flags&4){
if(frame_flagsFLAG_CHECKSUM){
checksum u(32)
}
data
@ -494,21 +493,16 @@ frame_code
the value 78 ('N') is forbidden to ensure that the byte is always
different from the first byte of any startcode
flags[frame_code]
flags[frame_code], frame_flags
Bit Name Description
1 data_size_msb if set, data_size_msb is at frame header,
1 FLAG_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.
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)
4 has_checksum if set then the frame header contains a checksum
2 FLAG_CHECKSUM if set then the frame header contains a checksum
4 FLAG_KEY if set, frame is keyframe
8 FLAG_EOR if set, stream has no relevance on
presentation. (EOR)
256 FLAG_CODED if set, coded_flags are stored in the frame header.
512 FLAG_INVALID if set, frame_code is invalid.
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