/*!
?*************************************************************************************
?*?\file?annexb.c
?*
?*?\brief
?*????Annex?B?Byte?Stream?format
?*
?*?\author
?*????Main?contributors?（see?contributors.h?for?copyright?address?and?affiliation?details）
?*??????-?Stephan?Wenger??????????????????
?*************************************************************************************
?*/

#include?
#include?

#include?“global.h“
#include?“annexb.h“
#include?“memalloc.h“


FILE?*bits?=?NULL;????????????????//!static?int?FindStartCode?（unsigned?char?*Buf?int?zeros_in_startcode）;

int?IsFirstByteStreamNALU=1;
int?LastAccessUnitExists=0;
int?NALUCount=0;


/*!
?************************************************************************
?*?\brief
?*????Returns?the?size?of?the?NALU?（bits?between?start?codes?in?case?of
?*????Annex?B.??nalu->buf?and?nalu->len?are?filled.??Other?field?in
?*????nalu->?remain?uninitialized?（will?be?taken?care?of?by?NALUtoRBSP.
?*
?*?\return
?*?????0?if?there?is?nothing?any?more?to?read?（EOF）
?*????-1?in?case?of?any?error
?*
?*??\note?Side-effect:?Returns?length?of?start-code?in?bytes.?
?*
?*?\note
?*???GetAnnexbNALU?expects?start?codes?at?byte?aligned?positions?in?the?file
?*
?************************************************************************
?*/

int?GetAnnexbNALU?（NALU_t?*nalu）
{
??int?info2?info3?pos?=?0;
??int?StartCodeFound?rewind;
??char?*Buf;
??int?LeadingZero8BitsCount=0?TrailingZero8Bits=0;
????
??if?（（Buf?=?（char*）calloc?（nalu->max_size??sizeof（char）））?==?NULL）?no_mem_exit（“GetAnnexbNALU:?Buf“）;

??while（!feof（bits）?&&?（Buf[pos++]=fgetc（bits））==0）;
??
??if（feof（bits））
??{
????if（pos==0）
????return?0;
????else
????{
??????printf（?“GetAnnexbNALU?can‘t?read?start?code\n“）;
??????free（Buf）;
??????return?-1;
????}
??}

??if（Buf[pos-1]!=1）
??{
????printf?（“GetAnnexbNALU:?no?Start?Code?at?the?begin?of?the?NALU?return?-1\n“）;
????free（Buf）;
????return?-1;
??}

??if（pos<3）
??{
????printf?（“GetAnnexbNALU:?no?Start?Code?at?the?begin?of?the?NALU?return?-1\n“）;
????free（Buf）;
????return?-1;
??}
??else?if（pos==3）
??{
????nalu->startcodeprefix_len?=?3;
????LeadingZero8BitsCount?=?0;
??}
??else
??{
????LeadingZero8BitsCount?=?pos-4;
????nalu->startcodeprefix_len?=?4;
??}

??//the?1st?byte?stream?NAL?unit?can?has?leading_zero_8bits?but?subsequent?ones?are?not
??//allowed?to?contain?it?since?these?zeros（if?any）?are?considered?trailing_zero_8bits
??//of?the?previous?byte?stream?NAL?unit.
??if（!IsFirstByteStreamNALU?&&?LeadingZero8BitsCount>0）
??{
????printf?（“GetAnnexbNALU:?The?leading_zero_8bits?syntax?can?only?be?present?in?the?first?byte?stream?NAL?unit?return?-1\n“）;
????free（Buf）;
????return?-1;
??}
??IsFirstByteStreamNALU=0;

??StartCodeFound?=?0;
??info2?=?0;
??info3?=?0;

??while?（!StartCodeFound）
??{
????if?（feof?（bits））
????{
??

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????644??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\data.txt

?????文件????????160??2013-01-19?21:41??jm8.6最終注釋版\jm8.6final\JM\bin\dataDec.txt

?????文件????????753??2004-09-16?22:38??jm8.6最終注釋版\jm8.6final\JM\bin\decoder.cfg

?????文件??????11218??2012-11-28?11:51??jm8.6最終注釋版\jm8.6final\JM\bin\encoder_baseline.cfg

?????文件??????11221??2004-09-02?12:46??jm8.6最終注釋版\jm8.6final\JM\bin\encoder_extended.cfg

?????文件??????11217??2012-11-28?11:51??jm8.6最終注釋版\jm8.6final\JM\bin\encoder_main.cfg

?????文件?????114048??2001-09-03?13:05??jm8.6最終注釋版\jm8.6final\JM\bin\foreman_part_qcif.yuv

?????文件???11404800??2006-04-22?05:18??jm8.6最終注釋版\jm8.6final\JM\bin\foreman_qcif.yuv

?????文件?????430179??2013-01-19?21:38??jm8.6最終注釋版\jm8.6final\JM\bin\ldecod.exe

?????文件?????136188??2013-01-19?21:38??jm8.6最終注釋版\jm8.6final\JM\bin\ldecod.map

?????文件?????730112??2013-01-19?21:38??jm8.6最終注釋版\jm8.6final\JM\bin\ldecod.pdb

?????文件????????100??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\leakybucketparam.cfg

?????文件?????????16??2001-12-20?10:42??jm8.6最終注釋版\jm8.6final\JM\bin\leakybucketrate.cfg

?????文件????1587836??2013-01-12?22:02??jm8.6最終注釋版\jm8.6final\JM\bin\lencod.ilk

?????文件??????????0??2013-01-12?22:02??jm8.6最終注釋版\jm8.6final\JM\bin\lencod.map

?????文件????1025024??2013-01-12?22:02??jm8.6最終注釋版\jm8.6final\JM\bin\lencod.pdb

?????文件???????2593??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\log.dat

?????文件????????642??2013-01-19?21:41??jm8.6最終注釋版\jm8.6final\JM\bin\log.dec

?????文件?????????66??2004-05-25?15:54??jm8.6最終注釋版\jm8.6final\JM\bin\sg0conf.cfg

?????文件????????126??2004-05-25?15:54??jm8.6最終注釋版\jm8.6final\JM\bin\sg2conf.cfg

?????文件???????1188??2004-05-25?15:54??jm8.6最終注釋版\jm8.6final\JM\bin\sg6conf.cfg

?????文件???????2919??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\stat.dat

?????文件???????7487??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\test.264

?????文件??????????0??2013-01-19?21:41??jm8.6最終注釋版\jm8.6final\JM\bin\test_dec.yuv

?????文件?????380160??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\test_rec.yuv

?????文件????2004269??2012-12-14?11:42??jm8.6最終注釋版\jm8.6final\JM\bin\trace_enc.txt

?????文件??????30821??2004-09-16?18:00??jm8.6最終注釋版\jm8.6final\JM\CHANGES.TXT

?????文件???????5002??2004-01-14?15:19??jm8.6最終注釋版\jm8.6final\JM\Changes_detail.txt

?????文件???????1383??2003-06-11?20:22??jm8.6最終注釋版\jm8.6final\JM\copyright.txt

?????文件???????1069??2001-08-29?13:58??jm8.6最終注釋版\jm8.6final\JM\disclaimer.txt

............此處省略361個文件信息