tv digital interativa no brasil se faz com ginga

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Page 1: TV digital interativa no Brasil se faz com Ginga

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Este documento é uma versão preliminar de: Barbosa, S.D.J. & Soares, L.F.G. TV digital interativa no Brasil se faz com Ginga: Fundamentos, Padrões, Autoria Declarativa e Usabilidade. Em T. Kowaltowski & K. Breitman (orgs.) Atualizações em Informática 2008. Rio de Janeiro, RJ: Editora PUC-Rio, 2008. pp.105-174.

Esta versão em formato A4 está disponível apenas para facilitar a impressão e não pode ser distribuída com fins comerciais.

Pedimos que as citações e referências sejam realizadas sobre a obra publicada, obedecendo a numeração de suas páginas.

Page 2: TV digital interativa no Brasil se faz com Ginga

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Page 4: TV digital interativa no Brasil se faz com Ginga

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Page 5: TV digital interativa no Brasil se faz com Ginga

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Page 6: TV digital interativa no Brasil se faz com Ginga

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Page 7: TV digital interativa no Brasil se faz com Ginga

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Tabela 3.1.Codificação de áudio no sistema brasileiro de TV digital.

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Page 8: TV digital interativa no Brasil se faz com Ginga

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Tabela 3.2. Codificação de vídeo no sistema brasileiro de TV digital.

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Page 9: TV digital interativa no Brasil se faz com Ginga

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3.2.3.1. Multiplexação de dados

^1!:O+T%1!5'!5.5%1!7%5'$!1'-!8-.&17%-8.5%1!.8-.Ib1!5'!1'-I#V%1!1]&<-%&%1![:-.<.$'&8'!.<%7O.5%1\2! 1#&<-%&#).5%1! [:%-8'$'&8'! .<%7O.5%1\! %+! .11]&<-%&%1! [5'1.<%7O.5%1\B! ^!1'-I#V%!5'!8-.&17%-8'!1]&<-%&%!.11+$'!,+'!%1!:O+T%1!5'!5.5%1!1E%!1#&<-%&#).5%1!'&8-'!1#2!1'P+#&5%!%!7.-.5#P$.!5'! '#T%!5%! 8'$7%! [8#$'O#&'\!7'O.!.5#VE%!5'!<.-#$0%1!5'! 8'$7%![8#$'18.$71\B!^1! :O+T%1! 5'! 5.5%12! &%! '&8.&8%2! &E%! '18E%! -'O.<#%&.5%1! i! 8'$7%-#).VE%!5%1! :O+T%1! 5'! ;+5#%! 7-#&<#7.O! '! I]5'%! 7-#&<#7.OB!U! 4#P+-.! gBH! #O+18-.! %! 7-%<'5#$'&8%B!S%8'!,+'!%1!<.-#$0%1!5'!8'$7%!.11%<#.5%1!.%1!:O+T%1!5'!5.5%1!1E%!5#:'-'&8'1!5.,+'O'1!.11%<#.5%1!.%1!:O+T%1!5'!;+5#%!7-#&<#7.O!'!I]5'%!7-#&<#7.OB!

65@6>;K(L:V%@)0

!>65@6>;K(L:V%@)0

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WX X

F

F

Y$2"' <-"/+"<.4

AD2)' <-"/+"<.4 Z 2.2'%Y$2"' <-"/+"<.4

AD2)' <-"/+"<.4

Y$2"' <-"/+"<.4

AD2)' <-"/+"<.4 Z 2.2'%!

Figura 3.5.Transporte de dados síncronos

! ^! 1'-I#V%! 5'! 8-.&17%-8'! 1#&<-%&#).5%! .11+$'! ,+'! %1! :O+T%1! 5'! 5.5%1! 1E%!1#&<-%&#).5%1! '&8-'! 1#! '! 8.$0b$! <%$! %1! :O+T%1! 5'! ;+5#%! 7-#&<#7.O! '! I]5'%! 7-#&<#7.O2!1'$7-'!1'P+#&5%!%!7.-.5#P$.!5'!'#T%!5%!8'$7%![8#$'O#&'\2!7'O.!.5#VE%!5'!<.-#$0%1!5'!8'$7%![8#$'18.$71\B!S'11'!<.1%2!%1!<.-#$0%1!5'!8'$7%!.11%<#.5%1!.%1!:O+T%1!5'!5.5%1!1E%!#P+.#1!i,+'O'1!.11%<#.5%1!.%1!:O+T%1!5'!;+5#%!7-#&<#7.O!'!I]5'%!7-#&<#7.OB!

! 4O+T%1! 5'! 5.5%1! &%! 8-.&17%-8'! 1]&<-%&%! '! 1#&<-%&#).5%! 1X! 7'-$#8'$! %!1#&<-%&#1$%!,+.&5%!%!#&18.&8'!5'!8'$7%!5'!1#&<-%&#).VE%!b!5'8'-$#&]18#<%B!U7O#<.Vc'1!#&8'-.8#I.12! %&5'! .! 1#&<-%&#).VE%! b! 5.5.! '$! +$! 8'$7%! .O'.8X-#%! 5'8'-$#&.5%! 7'O%!+1+;-#%!8'O'17'<8.5%-2!.7O#<.Vc'1!%&5'!%!<%&8'f5%!b!P'-.5%!'$!8'$7%!5'!'T#0#VE%!'!&E%!1'!7%5'!5'8'-$#&.-!%!8'$7%!'T.8%!%&5'!'I'&8%1!%<%--'-E%2!'!.7O#<.Vc'1!<+e%!<%&8'f5%!b!5'8'-$#&.5%! '$! 8'$7%! 5'! 'T#0#VE%2! &E%! 7%5'$! 1'-! 1#&<-%&#).5.1! +1.&5%! %1! 1'-I#V%1!1]&<-%&%!%+!1#&<-%&#).5%B!=.-.!8.&8%!'T#18'!%!1'-I#V%!5'!8-.&17%-8'!.11]&<-%&%B!

! "'-I#V%1!.11]&<-%&%1! #$7O#<.$!,+'!&'&Y+$.!$.-<.!5'! 8'$7%![8#$'18.$7\!'18;!.11%<#.5.! .%1! 5.5%1B! S%! '&8.&8%2! 7%5'! Y.I'-! 1#&<-%&#1$%! '&8-'! %1! I;-#%1! %0e'8%1!8-.&17%-8.5%12!'!'&8-'!'11'1!%0e'8%1!'!%1!:O+T%1!5'!;+5#%!'`%+!I]5'%!7-#&<#7.OB!=.-.!8.&8%!%!7.-.5#P$.!5'!1#&<-%&#).VE%!5'!'#T%!5%! 8'$7%!b!.0.&5%&.5%2!1'&5%!1+018#8+]5%!7'O%!7.-.5#P$.! 5'! <.+1.O#5.5'`-'18-#VE%B! S%1! 1'-I#V%1! .11]&<-%&%12! e+&8%! <%$! %1! 5.5%1! b!$.&5.5%!%!.7O#<.8#I%![Y.<Y+-.5%!&.!4#P+-.!gBj\2!,+'!'17'<#:#<.2!'$!+$.!O#&P+.P'$!5'!7-%P-.$.VE%!'17'<]:#<.2! %! <%$7%-8.$'&8%! -'O.8#I%!5%1!5.5%12!5%!;+5#%!7-#&<#7.O!'!5%!I]5'%!7-#&<#7.O2!&%!8'$7%!'!&%!'17.V%B!

65@6>;K(L:V%@)0

!>65@6>;K(L:V%@)0

W

WX X

Y$2"' <-"/+"<.4

AD2)' <-"/+"<.4 Z 2.2'%Y$2"' <-"/+"<.4

AD2)' <-"/+"<.4

Y$2"' <-"/+"<.4

AD2)' <-"/+"<.4 Z 2.2'%!

Figura 3.6.Transporte de dados assíncronos

! ^! 1'-I#V%! .11]&<-%&%! b! .! f&#<.! :%-$.! 7.-.! .! 1#&<-%&#).VE%! <%$! 8'$7%!#&5'8'-$#&.5%B!ZO'2!&%!'&8.&8%2!'T#P'!+$.!O#&P+.P'$!7.-.!'17'<#:#<.VE%!5%!1#&<-%&#1$%!'2! &%! -'<'78%-2! +$.! $;,+#&.! <.7.)! 5'! #&8'-7-'8.-! '! 'T'<+8.-! %1! <%$.&5%1! 5'!

Page 10: TV digital interativa no Brasil se faz com Ginga

! !

1#&<-%&#).VE%!'17'<#:#<.5%1!&'11.! O#&P+.P'$B!^!7.5-E%!C=Z6@G!"h18'$!'17'<#:#<.!%1!I;-#%1! 8#7%1! 5'! 1'-I#V%2!$.1! &E%! '17'<#:#<.! .! O#&P+.P'$! +1.5.! 7.-.! 1#&<-%&#).VE%! &%!1'-I#V%!.11]&<-%&%B!Z11'!.11+&8%!1'-;!8'$.!5.!"'VE%!KBgB!

! U8b!.P%-.!7.-8#$%1!5%!7-'11+7%18%!,+'!%1!:O+T%1!5'!5.5%1!e;!'18.I.$!P'-.5%1B!^!7.5-E%!C=Z6@G!"h18'$!'17'<#:#<.!8.$0b$!%!7-%<'11%!5'!P'-.VE%!5'11'1!:O+T%12!<%$%!5#1<+8#5%!.!1'P+#-B!

3.2.3.2. Car rossel de Dados DSM-C C

?%$%!.!1#&8%&#).VE%!5'!+$!<.&.O!'17'<]:#<%!5'!WF!['2!.11#$2!5'!+$!:O+T%!$+O8#7O'T.5%!C=Z6@G! "h18'$\! 7%5'! 1'-! -'.O#).5.! '$! ,+.O,+'-! #&18.&8'2! 5.5%1! ,+'! &E%! 8'&Y.$!-'O.VE%!8'$7%-.O!7%-!$'#%!5'!<.-#$0%1!5'!8'$7%!5'I'$!1'-!'&I#.5%1!<#<O#<.$'&8'B!"'!.11#$!:%-!:'#8%2!%!-'<'0#$'&8%!5'11'1!5.5%1!b!#&5'7'&5'&8'!5%!#&18.&8'!5'!1#&8%&#).VE%B!=.-.!5.-! 1+7%-8'! .! '11'! '&I#%! <]<O#<%2!7-'I.O'<'!&%1! 1#18'$.1!5'!WF!5#P#8.O! 8'--'18-'!.!+8#O#).VE%!5%!7-%8%<%O%!<.--%11'O!5'!5.5%1!'!<.--%11'O!5'!%0e'8%12!'17'<#:#<.5%!&%!7.5-E%!("C@??![(#P#8.O!"8%-.P'!C'5#.!!!?%$$.&5!.&5!?%&8-%O\!k9"^`9Z?!KgmKm@j!KLLmlB!

! >$!<.--%11'O!5'!5.5%1!("C@??!7'-$#8'!%!'&I#%!5'!5.5%1!&E%!'18-+8+-.5%1B!U!'18-+8+-.VE%!:#<.!7%-!<%&8.!5%!1#18'$.!5'!WF!5#P#8.O!,+'!%!+8#O#).B!^!1#18'$.!e.7%&D1!5'!WF!5#P#8.O!:.)!+1%!5'11.!:.<#O#5.5'!5%!7.5-E%B!>$!<.--%11'O!5'!%0e'8%1!7'-$#8'!%!'&I#%!<]<O#<%! 5'! +$! 1#18'$.! 5'! .-,+#I%1B! U11#$2! .%! 1#&8%&#).-! +$! 5'8'-$#&.5%! <.&.O2! %!-'<'78%-!5'I'!1'-!<.7.)!5'!5'<%5#:#<.-!%1!5.5%1!-'<'0#5%1!'!<%O%<;@O%1!'$!+$.!;-'.!5'!$'$X-#.! 7.-.! ,+'! 7%11.$! 1'-! +8#O#).5%12! 7-'1'-I.&5%! .! '18-+8+-.! 5'! .-,+#I%1! '!5#-'8X-#%1!'&I#.5.B!(.5%1!'&I#.5%1!8.&8%!&%1!1#18'$.1!.$'-#<.&%!'!'+-%7'+2!,+.&8%!&%!1#18'$.!0-.1#O'#-%!5'!WF!5#P#8.O2!+8#O#).$!%!<.--%11'O!5'!%0e'8%1B!?.0'!%01'-I.-!,+'!$.#1!5'! +$! <.--%11'O! 7%5'! 1'-! 8-.&1$#8#5%! 1#$+O8.&'.$'&8'2! '!,+'!+$!<.--%11'O!5'!%0e'8%1!7%5'! :.)'-! +1%! 5'! -'<+-1%1! [.-,+#I%12! 5#-'8X-#%1! '! %+8-%1! %0e'8%1! k9"^`9Z?! KgmKm@j!KLLml\! ,+'! '18'e.$! 1'&5%! 8-.&1:'-#5%1! '$! %+8-%1! <.--%11b#1B! C.#1! .#&5.2! .7O#<.Vc'1!8-.&1:'-#5.1!'$!.-,+#I%1!5'!+$!<.--%11'O!7%5'$!:.)'-!-':'-D&<#.!.!-'<+-1%1!7-'1'&8'1!&%!$'1$%!<.--%11'O!%+!.! -'<+-1%1!5'!%+8-%1!<.--%11b#1B!=%-!'T'$7O%2!+$.!7;P#&.!oWC3!8-.&1$#8#5.!'$!+$!<.--%11'O!7%5'!-':'-'&<#.-!+$.!#$.P'$!<+e%!<%&8'f5%!b!8-.&1$#8#5%!'$! +$! %+8-%! <.--%11'O! 5'! %0e'8%1B! ?.--%11'O! 5'! %0e'8%1! b! 5'! :.8%! +$! 7-%8%<%O%! 5'!8-.&1$#11E%!<]<O#<.!5'!5.5%1B!^!-'1+O8.5%!b!+$!:O+T%!'O'$'&8.-!5'!5.5%1!,+'!<%&8b$!%!1#18'$.!5'! .-,+#I%1! 8-.&1$#8#5%! 5'! :%-$.! <]<O#<.B!U11#$2! 1'! +$!5'8'-$#&.5%! -'<'78%-!&E%!-'<'0'+!+$!0O%<%!5'!5.5%1!'$!7.-8#<+O.-![5'I#5%!.!+$.!:.OY.!&.!8-.&1$#11E%!%+!7%-!8'-! 1#&8%&#).5%! %! <.&.O! .7X1! .! 8-.&1$#11E%! 5'11'! 0O%<%\2! 0.18.! '17'-.-! 7'O.! 1+.!-'8-.&1$#11E%!<%--'8.B!

! ?%$%!$'&<#%&.5%!.&8'-#%-$'&8'2! '$!+$! 8-.&17%-8'!5'!5.5%1! .11]&<-%&%2! 8%5.!'17'<#:#<.VE%!5'!1#&<-%&#1$%!'&8-'!%1!5.5%12!;+5#%!7-#&<#7.O!'!I]5'%!7-#&<#7.O!b!'&I#.5.!'$! +$! .7O#<.8#I%! [0O%<%! Y.<Y+-.5%! &.! 4#P+-.! gBj\B! Z11'! .7O#<.8#I%! 8.$0b$! I.#!8-.&17%-8.5%!'$!+$!<.--%11'O!("C@??B!=.-.!,+'!%!.7O#<.8#I%!'&8-'!'$!'T'<+VE%2!+$!<%$.&5%!5'I'!1'-!'&I#.5%!.%! -'<'78%-B!^!7.5-E%!C=Z6@G!"h18'$! 8.$0b$!'17'<#:#<.!<%$%!#11%!7%5'!1'-!-'.O#).5%!.8-.Ib1!5%!'&I#%!5'!'I'&8%1!5'!1#&<-%&#1$%!("C@??![%+!1#$7O'1$'&8'!'I'&8%1!("C@??\B!

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3.2.3.3. F luxo de T ransporte

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! "#$7O#:#<.5.$'&8'2! $+O8#7O'T.-! 1'-I#V%1! '$! +$! :O+T%! 5'! 8-.&17%-8'! 1#P&#:#<.!%-P.&#).-! %1! 7.<%8'1! 5%1! I;-#%1! :O+T%1! 'O'$'&8.-'12! 7'-8'&<'&8'1! .%1! 1'-I#V%1!<%&8'$7O.5%12!'$!+$!f&#<%!:O+T%B!=.-.!#11%2!b!&'<'11;-#%!#&1'-#-!&%!:O+T%!5'!8-.&17%-8'!#&:%-$.Vc'1!,+'!7'-$#8.$!.%!5'<%5#:#<.5%-!C=Z6@G!#5'&8#:#<.-!.!,+.O!1'-I#V%!+$!5.5%!:O+T%!'O'$'&8.-!7'-8'&<'B!Z11.1!#&:%-$.Vc'1!1E%!5#17%18.1!<%$%!+$!<%&e+&8%!5'!8.0'O.1!5'!#&:%-$.VE%!'17'<]:#<.!5'!7-%P-.$.![="9!!!=-%P-.$!"7'<#:#<!9&:%-$.8#%&\B!>$.!="9!7.-8#<+O.-2! 5'&%$#&.5.! =CW! [=-%P-.$!C.7! W.0O'\2! <%&8b$! .! O#18.! 5'! #5'&8#:#<.5%-'1!5%1!:O+T%1!'O'$'&8.-'1!,+'!<%$7c'$!+$!1'-I#V%B!?.5.!=CW!'&<%&8-.5.!-'7-'1'&8.!+$!1'-I#V%! 5#17%&]I'OB! U1! =CW1! 1E%! O%<.O#).5.1! .8-.Ib1! 5'! %+8-.! ="9! 5'&%$#&.5.! =UW![=-%P-.$! U11%<#.8#%&! W.0O'\2! ,+'! <%&8b$! #5'&8#:#<.5%-'1! 5%1! :O+T%1! 'O'$'&8.-'1!<%&8'&5%!.1!=CW1B!^!:O+T%!'O'$'&8.-!,+'!7%11+#!.!=UW!7%11+#!#5'&8#:#<.5%-!:#T%!<%$!%!I.O%-! Y'T.5'<#$.O! MTMMB! U! 4#P+-.! gBn! #O+18-.! .! $+O8#7O'T.VE%! C=Z6@G! "h18'$2!#&<O+#&5%!%1!:O+T%1!'O'$'&8.-'1!5.1!8.0'O.1!="9B!

Fluxos elementares

(vídeo/áudio/dados)

Mapa dos fluxos elementares

(Program map table)

Fluxo de programa

Fluxos de programa 1!n

Mapa dos fluxos de programa

(Program association table)

Fluxo de transporte

PCR- Program

Clock Reference

!Figura 3.7. Fluxo de transporte MPEG-2 System

*CHCVC ) N(-&'"FG()

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Page 12: TV digital interativa no Brasil se faz com Ginga

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Page 15: TV digital interativa no Brasil se faz com Ginga

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Page 16: TV digital interativa no Brasil se faz com Ginga

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Page 17: TV digital interativa no Brasil se faz com Ginga

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Tabela 3.3. Ambientes de aplicações para receptores fixos e móveis

Middleware Sistema de TVD Ambiente Declarativo Ambiente Procedural

ACAP Americano/ATSC ACAP-X [ATSC A-101 2005] (linguagem declarativa = XHTML like; linguagem não-declarativa = ECMAScript)

ACAP-J [ATSC A-101 2005] (linguagem não-declarativa = Java

MHP Europeu/DVB-T DVB-HTML [ETSI TS 102 812 V1.2.2 2006] (linguagem declarativa = XHTML like; linguagem não-declarativa = ECMAScript)

MHP [ETSI TS 102 812 V1.2.2 2006]

(linguagem não-declarativa = Java

ARIB-BML Japonês/ISDB-T ARIB ! BML [ARIB B-24 2004] (linguagem declarativa = BML (XHTML like; linguagem não-declarativa = ECMAScript)

Opcional (GEM [ETSI TS 102 819 V1.3.1 2005] like); não implementado)

Ginga Brasileiro/SBTVD

Ginga-NCL [ABNT NBR 15606-2 2007] (linguagem declarativa = NCL; linguagem não-declarativa = Lua)

Ginga-J

(linguagem não-declarativa = Java

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Tabela 3.4. Ambientes de aplicações para receptores portáteis

Middleware Sistema de TVD Ambiente Declarativo Ambiente Procedural

ARIB-BML Japonês/ISDB-T ARIB ! BML [ARIB B-24 2004] (linguagem declarativa = BML (XHTML like; linguagem não-declarativa = ECMAScript)

X

Ginga Brasileiro/SBTVD Ginga-NCL [ABNT NBR 15606-5 2007] (linguagem declarativa = NCL; linguagem não-declarativa = Lua)

Opcional o Ginga-J

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Page 21: TV digital interativa no Brasil se faz com Ginga

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Page 22: TV digital interativa no Brasil se faz com Ginga

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Figura 3.12. Representação de nós de mídia e de composição.

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Page 23: TV digital interativa no Brasil se faz com Ginga

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! um cabeçalho de arquivo NCL (linhas 1 e 2);

! uma seção de cabeçalho do programa (seção .&/#, linhas 3 a 13), onde se definem as

regiões, os descritores, os conectores e as regras utilizados pelo programa;

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!G!S'18'!5%<+$'&8%2!+8#O#).-'$%1!%1!8'-$%1!(+.4+'9'!'!0.&/9*,).%A"#(*+9F0#'C!<%$%!1#&s&#$%1B!

Page 24: TV digital interativa no Brasil se faz com Ginga

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! o corpo do programa (seção !"#$, linhas 14 a 17), onde se definem os contextos, nós

de mídia, elos e outros elementos que definem o conteúdo e a estrutura do programa;

! pelo menos uma porta que indica por onde o programa começa a ser exibido (port pInicio, linha 15); e

! a conclusão do documento (linha 18).

Tabela 3.5. Estrutura básica de um documento NCL.

cabeçalho do arquivo NCL

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cabeçalho do programa

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base de regiões

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base de descritores

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base de conectores

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ponto de interface do programa

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conteúdo do programa

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término 0A1 2F)+6D7

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Exemplo 01 ! Reproduzindo um vídeo Z18.! 1'VE%!.7-'1'&8.!+$!5%<+$'&8%!S?3!1#$7O'12!,+'!.7'&.1! -'7-%5+)!+$!I]5'%!'$!8'O.!#&8'#-.B!U7'1.-!5'!&E%!1'!8-.8.-!5'!+$!5%<+$'&8%!Y#7'-$]5#.!8]7#<%![7%#1!&E%!Y;!'O%1!O#P.&5%!%1!&X1\2!%!'T'$7O%!8'$!7%-!%0e'8#I%!:.$#O#.-#).-!%!O'#8%-!<%$!.OP+&1!'O'$'&8%1!0;1#<%1!5.!O#&P+.P'$!S?3B!

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Page 25: TV digital interativa no Brasil se faz com Ginga

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(a)

pVideoAbertura

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(b)

rgTelaInteira: 0,0 (100%x100%)

rgTV: 0, 0 (100%x100%)

Figura 3.14. Visões (a) estrutural e (b) de leiaute do primeiro exemplo.

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! (#: identificador unívoco da base de regiões

Page 26: TV digital interativa no Brasil se faz com Ginga

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! #&8(+&: dispositivo ao qual a região está associada. Pode ser da forma

*$*-&5>+%&&)\(]^7*$*-&5b[#("\(], conforme os dispositivos disponíveis.

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! (#*: identificador único, utilizado nas referências à região (por exemplo, pelos

descritores das mídias que serão apresentadas na região)

! -(-6&7(título): título da região, cujo uso depende da implementação do formatador

! 6&Q-7 (esquerda), -", (topo), %('.- (direita), !"--"5 (base): coordenadas da região,

com relação às coordenadas da região pai (ou da tela, no caso de a região não estar

aninhada a nenhuma outra).

! G(#-. (largura) e .&('.- (altura): dimensões horizontal e vertical da região. Cabe

observar que o autor pode escolher especificar as dimensões de uma região

conforme sua conveniência. Por exemplo, em certos casos pode ser melhor definir

os atributos %('.-^7 !"--"5^7 G(#-. e .&('.-. Em outros casos, pode ser mais

apropriado especificar os atributos -",^76&Q-^7G(#-.7e7.&('.-.

! c=)#&4: número entre 0 e 255 que define a "camada" da região, ou sua posição da

região no eixo "z", utilizado geralmente para indicar, no caso de regiões sobrepostas,

quais regiões aparecem sobre quais outras. Camadas com c=)#&4 maior são

apresentadas no topo de (sobrepondo) camadas com c=)#&4 menor.

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! (#: identificador único, utilizado nas referências ao descritor (por exemplo, nos nós

de mídia/conteúdo apresentados pelo descritor)

! %&'("): identificador da região associada ao descritor. Ao utilizar o descritor, o

objeto de mídia será exibido na região correspondente. Esse atributo só precisa ser

especificado para objetos que possuam um conteúdo visual a ser exibido.

! &4,6(+(-M[%: define a duração do objeto de mídia associado ao descritor. O valor

deste atributo deve ser expresso em segundos, no formato BCBD (valor numérico

inteiro ou real seguido da letra "s"). Quando &4,6(+(-M[%7 não for especificado, o

objeto que estiver associado ao descritor será exibido com sua duração default. Mídias como textos e imagens estáticas que utilizam um descritor sem esse atributo

definido possuem duração default infinita.

! Q%&&c&17 identifica o que acontece ao final da apresentação do objeto de mídia

associado ao descritor. Em um vídeo, o valor "7'% indica que, ao término natural do

vídeo, o último quadro deve ser congelado indefinidamente.

! ,6/$&%: identifica a ferramenta de apresentação a ser utilizada para exibir o objeto de

mídia associado ao descritor. Quando esse atributo é omitido, o formatador procura

pela ferramenta default em função do tipo do objeto de mídia.

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! 2#&*+%(,-"%P/%/5D: define um parâmetro do descritor como um par (propriedade,

valor). As propriedades e seus respectivos valores dependem do programa de

exibição da mídia associada ao descritor.

?.5.!5'1<-#8%-!7%5'!<%&8'-!5#I'-1%1!'O'$'&8%1!2#&*+%(,-"%P/%/5D2!5':#&#5%1!&%!:%-$.8%q!

Page 28: TV digital interativa no Brasil se faz com Ginga

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! (#: identificador único do nó de mídia, utilizado nas referências ao nó (por exemplo,

nas portas dos nós de contexto que levam à mídia)

! -$,&: tipo de mídia, especificado como MIME, através de um dos seguintes valores: -&4-F.-56^7 -&4-F+**^7 -&4-F456^7 (5/'&F!5,^7 (5/'&F,)'^7 (5/'&F'(Q^7 (5/'&Fe,&'^7/[#("F!/*(+^7 /[#("F5,K^7 /[#("F5,E^7 /[#("F5,&'R^7 8(#&"F5,&'^7 /,,6(+/-(")F4@'()'/@HIJ[/^7 /,,6(+/-(")F4@'()'/@HIJ&-^7 /,,6(+/-(")F4@'()'/@*&--()'*^7 /,,6(+/-(")F4@'()'/@-(5&

! *%+: fonte do objeto de mídia. Trata-se do caminho para o arquivo de mídia. Esse

caminho pode ser relativo, a partir do diretório onde se encontra o arquivo NCL, ou

absoluto, através de uma URI.

! #&*+%(,-"%: identificador ((#) do descritor que controla a apresentação do objeto de

mídia

! %&Q&%: referência a um outro nó de mídia previamente definido, como forma de re-

uso de nó (utiliza os atributos do nó de mídia referenciado, exceto o (#). Esse

Page 29: TV digital interativa no Brasil se faz com Ginga

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atributo será visto mais adiante no exemplo 07, no caso de importação de um

programa NCL que se encontra em outro arquivo.

! )&G=)*-/)+&: utilizado apenas quando o atributo %&Q&% é definido. Estabelece se este

nó gera uma nova instância do objeto no formatador ou se reutiliza a instância

previamente criada.

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! (#: identificador único da porta, utilizado nas referências à porta (por exemplo, por

elos)

! +"5,")&)-: nó de mídia ou contexto ao qual a porta mapeia.

! ()-&%Q/+&: nome do ponto de interface de destino: (# da porta de um contexto ou da

âncora de destino no nó de mídia.

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Exemplo 02 ! Quando acontecer " isto " , faça " aquilo " : iniciando e terminando dois objetos de mídia simultaneamente ^!%0e'8#I%!5'18'!'T'$7O%!b!.7-'1'&8.-!5%#1!&X1!5'!$]5#.!1#$+O8.&'.$'&8'2!+$!5'!I]5'%![4(2%356%7"'78\! '! %+8-%! 5'! #$.P'$! [()*E';87<&"73\B! Z$!S?32! %! 1#&<-%&#1$%! 5'! #&]<#%! '!8b-$#&%! '&8-'! $]5#.1! b! 5.5%! 7%-! 'O%1! '&8-'! .1! $]5#.1B! ^! <%$7%-8.$'&8%! 5%! 'O%! b!5':#&#5%! 7'O%! <%&'<8%-! .! 'O'! .11%<#.5%B!^! <%&'<8%-! 5':#&'! ! +$!%+!$.#1! 7.7b#1! 7.-.! .!<%&5#VE%!5'!.8#I.VE%!5%!'O%!'!+$!%+!$.#1!7.7b#1!7.-.!.Vc'1!,+'!5'I'$!1'-!-'.O#).5.1!,+.&5%! %! 'O%! b! .8#I.5%B! S'18'! 'T'$7O%2! 1E%! +8#O#).5%1! %1! <%&'<8%-'1! 3&F%*(&G"87"! '!3&H&2G"30B!^!<%&'<8%-!3&F%*(&G"87"!b!0'$!1#$7O'1q!7%11+#!.7'&.1!+$!7.7'O!5'!<%&5#VE%!'!+$!7.7'O!5'!.8#I.VE%q!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!g!^!6#&P.@S?3!Z$+O.8%-!7%5'!1'-!0.#T.5%!5.!7;P#&.!{'0!)+6;"%';!%B!

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! !

! ")S&'(), condição indicando que o elo é ativado quando o nó ligado a este papel for

iniciado; e

! *-/%-, ação indicando que o elo, ao ser ativado, iniciará a exibição do nó ligado a

este papel.

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onBeginStart

onEndStop

pVideoAbertura

bodyvideoAbertura imgPularIntro

rgTelaInteira

rgBotao

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Figura 3.15. Visão (a) estrutural e (b) de leiaute do exemplo 02.

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Page 31: TV digital interativa no Brasil se faz com Ginga

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Page 32: TV digital interativa no Brasil se faz com Ginga

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^!7-#$'#-%!'O%!.!1'-!<-#.5%!b!%!'O%!,+'!5'I'! #&#<#.-!.!.7-'1'&8.VE%!5%!&X! ()*E';87<&"73-

.11#$! ,+'! .! .7-'1'&8.VE%! 5%! &X! 4(2%356%7"'78! b! #&#<#.5.B! Z$! %+8-.1! 7.O.I-.12! v,+.&5%!4(2%356%7"'78! #&#<#.-2! #&#<#.! ()*E';87<&"73vB! ZT.$#&.&5%! .! 5':#&#VE%! 5%1! <%&'<8%-'1!5':#&#5%1! &%! 7.11%! .&8'-#%-2! %01'-I.@1'! ,+'! '11'! <%$7%-8.$'&8%! b! 5':#&#5%! 7'O%!<%&'<8%-!3&F%*(&G"87"B!^!'O%!.!1'-!5':#&#5%!5'I'!'&8E%!O#P.-!.!$]5#.!4(2%356%7"'78-.%!7.7'O!3&F%*(&!'!.!$]5#.!()*E';87<&"73-.%!7.7'O!*-/%-B!

U!5':#&#VE%!5%!'O%!b!:'#8.!&%!<%-7%!5%!5%<+$'&8%![1'VE%!2!"#$D\2!P'-.O$'&8'!.0.#T%!5.!5':#&#VE%!5.1!$]5#.1q!26()h74+"))&+-"%9:")S&'()>-/%-:D77772!()#7+"5,")&)-9:8(#&"b!&%-[%/:7%"6&9:")S&'():7FD7777772!()#7+"5,")&)-9:(5'P[6/%=)-%":7%"6&9:*-/%-:7FD72F6()hD7

^!'O%!7.-.!1#&<-%&#).-!%!8b-$#&%!5'!'T#0#VE%!5.1!$]5#.1!b!5':#&#5%!5'!:%-$.!.&;O%P.q!26()h74+"))&+-"%9:")L)#>-",:D77772!()#7+"5,")&)-9:8(#&"b!&%-[%/:7%"6&9:")L)#:7FD77772!()#7+"5,")&)-9:(5'P[6/%=)-%":7%"6&9:*-",:7FD72F6()hD7

.&%&(#&"*%(,&/#0(>?-#(

^1! 'O%1! [5#,\$\! .11%<#.$! &X1! .8-.Ib1! 5'! <%&'<8%-'1! [&.,,*&).+$\2! ,+'! 5':#&'$! .!1'$d&8#<.!5.!.11%<#.VE%!'&8-'!%1!&X1B!U!S?3!5':#&'!%1!1'P+#&8'1!.8-#0+8%1!5'!'O%1q!

! (#: identificador único do elo

! 4+"))&+-"%: identificador do conector associado ao elo

U!S?3!5':#&'!%1!1'P+#&8'1!'O'$'&8%1!<%&8#5%1!&+$!'O'$'&8%!5'!'O%q!

! 6()hP/%/5: define um parâmetro do elo como um par <propriedade, valor>. As

propriedades e seus respectivos valores dependem da definição do conector ao qual

o elo está associado. Um elo pode conter diversos elementos 6()hP/%/5.

! !()#: indica uma ligação entre um componente (+"5,")&)-, nó de mídia ou de

contexto) e seu papel (%"6&) no elo, conforme a semântica do conector. Em alguns

casos deve-se indicar também o ponto de interface (()-&%Q/+&) do nó ao qual o elo é

ligado: uma porta de contexto, uma âncora de conteúdo ou uma propriedade de um

nó de mídia. Um elo pode conter diversos elementos !()#, mas deve conter pelo

menos um !()# para cada papel definido no conector.

^!'O'$'&8%!D#,0!7%5'!.#&5.!<%&8'-!+$.!%+!$.#1!#&18d&<#.1!5%!1'P+#&8'!'O'$'&8%!<%$%!'O'$'&8%1!:#OY%1q!

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!!

! !()#P/%/5: define um parâmetro específico do !()# como um par <propriedade,

valor>. As propriedades e seus respectivos valores dependem da definição do

conector ao qual o elo está associado.

^1! <%&'<8%-'1! ")S&'()>-/%-! '! ")L)#>-",7 1E%! 0'$! 1#$7O'12! 7%#1! #&<O+'$! .7'&.1! +$.!<%&5#VE%! '! +$.! .VE%2! '!&E%!'&I%OI'$!7.-d$'8-%1!5'! <%&'<8%-B!C.#1! .5#.&8'!I'-'$%1!%+8-%1!<%&'<8%-'1!$.#1!'O.0%-.5%12!,+'!.P-+7.$!<%&5#Vc'1!'!.Vc'12!7'-$#8'$!.!O#P.VE%!5'!$.#1!5'!+$!&X!.!+$!$'1$%!7.7'O!%+!.<'#8.$!7.-d$'8-%1B!

Exemplo 03 ! Interação do usuário: inter rompendo um vídeo e iniciando outro ^! %0e'8#I%! 5'18'! 'T'$7O%! b! $%5#:#<.-! %! 'T'$7O%! .&8'-#%-! 7.-.! ,+'! %! +1+;-#%! 7%11.!7-%11'P+#-!7.-.!+$!1'P+&5%!I]5'%![4(2%3E7(&!(08;\!7-'11#%&.&5%!.!8'<O.!I'-5'!5%!<%&8-%O'!-'$%8%B! U$0%1! %1! I]5'%1! 5'I'$! 1'-! .7-'1'&8.5%1! &.! $'1$.! 7%1#VE%! 5.! 8'O.B! =.-.!<.78+-.-! .! #&8'-.VE%! 5%! +1+;-#%! <%$! %! <%&8-%O'! -'$%8%2! 7-'<#1.$%1! 5'! +$! &%I%!<%&'<8%-2!5'18.!I')!+$!,+'!+8#O#)'!%!7.7'O!7-'5':#&#5%!")>&6&+-(")2!'!,+'!-'<'0.!<%$%!7.-d$'8-%! %! <X5#P%! 5.! 8'<O.! ,+'! 1'! 5'1'e.! <.78+-.-B! ^! <%$7%-8.$'&8%! 5%! 'O%! ,+'!+8#O#).-;!%!<%&'<8%-!5'I'!1'-q!5+-.&8'!.!'T#0#VE%!5'! ()*E';87<&"732!,+.&5%!.! 8'<O.!I'-5'![igLLH\! 5%! <%&8-%O'! -'$%8%! :%-! 7-'11#%&.5.2! 7;-.! %! I]5'%! 5'! .0'-8+-.! [4(2%356%7"'78\B!r+.&5%! %! I]5'%! 5'! .0'-8+-.! 8'-$#&.2! %! 'O%! ,+'! 8'-$#&.! .! 'T#0#VE%! 5.! #$.P'$!()*E';87<&"73!'!%!'O%!,+'!#&#<#.!.!'T#0#VE%!5%!I]5'%!7-#&<#7.O![4(2%3E7(&!(08;\!1E%!.8#I.5%12!-'1+O8.&5%!&%!<%$7%-8.$'&8%!5'1'e.5%B!=.-.!,+'!%!8'O'17'<8.5%-!1.#0.!,+.O!b!.!8'<O.!,+'!7%5'!7-'11#%&.-!.!<.5.!#&18.&8'2!b!#$7%-8.&8'!,+'!+$.!$]5#.!1'e.!'T#0#5.!#&5#<.&5%!.1!%7%-8+&#5.5'1! 5'! #&8'-.VE%B! 911%! e;! '18;! 1'&5%! :'#8%! 7'O.! $]5#.! ()*E';87<&"732! ,+'! .8b!.P%-.!&E%!7%11+].!<%$7%-8.$'&8%!5'!#&8'-.8#I#5.5'!.!'O.!.11%<#.5%B!

S'18'!'T'$7O%2!b!.<-'1<'&8.5%!+$!'O%!,+'!+8#O#).!%!<%&'<8%-!3&K%LG%;%!"(3&G"302!.!1'-! <-#.5%!7.-.! <.78+-.-!%!7-'11#%&.$'&8%!5.! 8'<O.!I'-5'! [igLLH\!5%!<%&8-%O'! -'$%8%!'!7.-.-!%!I]5'%!5'!.0'-8+-.![4#P+-.!gBKj\B!

onBeginStart

onEndStop

pVideoAbertura

bodyvideoAbertura imgPularIntro

videoPrincipal

onEndStart

onKeySelectionStopkey=GREEN

Figura 3.16. Visão estrutural do exemplo 03.

="55()DJ)@16.0.0-()()8(018%(2)

^1! <%&'<8%-'1! +8#O#).5%1! &'18'! 'T'$7O%! 1E%q! 3&F%*(&G"87"2! 3&H&2G"302! 3&H&2G"87"! '!3&K%LG%;%!"(3&G"30B! ^1! <%&'<8%-'1! 3&F%*(&G"87",- 3&H&2G"30! '! 3&H&2G"87"! :%-.$! 5':#&#5%1!.&8'-#%-$'&8'B!U!8.0'O.!.!1'P+#-!.7-'1'&8.!.!5':#&#VE%!5%!<%&'<8%-!3&K%LG%;%!"(3&G"30q!

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! !

Tabela 3.7. Conector onKeySelectionStop.

?X5#P%!S?3q!

77777772+/[*/6I"))&+-"%7(#9:")j&$>&6&+-(")>-",:D77777777772+"))&+-"%P/%/57)/5&9:/N&+6/:7FD77777777772*(5,6&I")#(-(")7%"6&9:")>&6&+-("):7h&$9:k/N&+6/:FD77777777772*(5,6&b+-(")7%"6&9:*-",:7FD777777772F+/[*/6I"))&+-"%D7

3'#8+-.q! Z&,+.&8%! %! &X! O#P.5%! .%! 7.7'O! ")>&6&+-(")! :%-! .7-'1'&8.5%2!!,+.&5%! .! 8'<O.! 8:%!;8- :%-! 7-'11#%&.5.2!!7;-.!%!&X!O#P.5%!.%!7.7'O!*-",B!

^01'-I.VE%q! ^1!'O%1!,+'!+8#O#).-'$!'18'!<%&'<8%-!5'I'-E%!#5'&8#:#<.-2!<%$%!7.-d$'8-%!.5#<#%&.O! 5.! O#P.VE%! <%$! %! &X! 5'! %-#P'$! [!()#P/%/57 "[7 6()hP/%/5\2! %!<X5#P%!I#-8+.O!5.!8'<O.!5%!<%&8-%O'!-'$%8%!.11%<#.5.!i!1'O'VE%2!.8-.Ib1!5%!7.-d$'8-%!8:%!;8B!=%-!'T'$7O%q!!2!()#7+"5,")&)-9:(5'P[6/%=)-%":7%"6&9:")>&6&+-("):D7

2!()#P/%/57)/5&9:/N&+6/:78/6[&9:igLLH:7FD7

2F!()#D

?%$%!1'$7-'2!%!<%&'<8%-!")j&$>&6&+-(")>-",!5'I'!1'-!5':#&#5%!&.!1'VE%!+"))&+-"%S/*&q!2+/[*/6I"))&+-"%7(#9:")j&$>&6&+-(")>-",:D7

2+"))&+-"%P/%/57)/5&9:/N&+6/:7FD72*(5,6&I")#(-(")7%"6&9:")>&6&+-("):7h&$9:k/N&+6/:7FD72*(5,6&b+-(")7%"6&9:*-",:7FD7

2F+/[*/6I"))&+-"%D7

="55()HJ)@16.0.0-()()1'()-1).0%12"%.3.-"-1)

^! 'O%! b! 5':#&#5%! 5'! :%-$.! 1'$'OY.&8'! .%1! 'O%1! .&8'-#%-'12! <%$! ()*E';87<&"73-&%! 7.7'O!")>&6&+-(")! [<%$! 7.-d$'8-%! 8:%!;8- #P+.O! .! MJHHN2! <%--'17%&5'&8'! i! 8'<O.! I'-5'! 5%!<%&8-%O'!-'$%8%\!'!4(2%356%7"'78-&%!7.7'O!*-",q!

26()h74+"))&+-"%9:")j&$>&6&+-(")>-",:D72!()#7+"5,")&)-9:(5'P[6/%=)-%":7%"6&9:")>&6&+-("):D7

2!()#P/%/57)/5&9:/N&+6/:78/6[&9:igLLH:7FD72F!()#D72!()#7+"5,")&)-9:8(#&"b!&%-[%/:7%"6&9:*-",:7FD7

2F6()hD7

F.O'! %01'-I.-! ,+'2! <%$%! %! 7.7'O! ")>&6&+-(")! '18;! .11%<#.5%! i! $]5#.! ()*E';87<&"732! b!&'<'11;-#%! ,+'! '18.!$]5#.! '18'e.! 1'&5%! .7-'1'&8.5.! 7.-.! ,+'! %! 'O%! 7%11.! 1'-! .8#I.5%B!Z&,+.&8%!.!'T#0#VE%!5.!$]5#.! ()*E';87<&"73!&E%!8#I'-!1#5%!#&#<#.5.2!'11'!'O%!&E%!7%5'-;!1'-!.8#I.5%B!!

.&%&(#&"*%(,&/#0(=56/1-#(6*($*'?&#(6-('-9$%-?*(%*,-$-(

^1!<X5#P%1!5'!8'<O.1!5':#&#5%1!&%!7.5-E%!6#&P.@S?3!'!,+'!7%5'$!1'-!+8#O#).5%1!<%$%!I.O%-!5%!.8-#0+8%!h&$![7.11.5%1!<%$%!I.O%-!5%!7.-d$'8-%!8:%!;82!&'11'!'T'$7O%\!1E%q!M2!K2!G2!g2!J2!H2!j2!n2!m2!L2!U2!/2!?2!(2!Z2!42!62!o2!92!*2!u2!32!C2!S2!^2!=2!r2!A2!"2!W2!>2!F2!z2! |2! �2! p2! �2! �2! CZS>2! 9S4^2! 6>9(Z2! ?>A"^A�3Z4W2! ?>A"^A�A96oW2!?>A"^A�>=2! ?>A"^A�(^zS2! ?oUSSZ3�>=2! ?oUSSZ3�(^zS2!F^3>CZ�>=2! F^3>CZ�(^zS2! ZSWZA2! AZ(2! 6AZZS2! �Z33^z2! /3>Z2!/U?u2!Z|9W2!=^zZA2!AZz9S(2!"W^=2!Z*Z?W2!=3U�2!AZ?^A(2!=U>"Z!

Exemplo 04 ! T rabalhando com bases de conectores em arquivos separados ?%$%! 5#8%! .&8'-#%-$'&8'2! 'T#18'$! 5+.1! :%-$.1! 5'! 1'! 5':#&#-! '! +8#O#).-! <%&'<8%-'1q![.\!5':#&#&5%!%1!&%I%1!<%&'<8%-'1!&%!7-X7-#%!Y#7'-5%<+$'&8%x!%+![0\!<-#.&5%!+$!&%I%!

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!!

.-,+#I%!5'!<%&'<8%-'1!'!#$7%-8.&5%@%!&.!1'VE%!+"))&+-"%S/*&B!S%!'T'$7O%!.&8'-#%-2!:%#!

.5%8.5.!.!'18-.8bP#.![.\B!S'18'!'T'$7O%2!b!.5%8.5.!.!'18-.8bP#.![0\2!1'7.-.&5%!%!.-,+#I%!5'!<%&'<8%-'1!'!#$7%-8.&5%@%!&%!7-%P-.$.!7-#&<#7.OJB!

="55()DJ)!2."0-()"2U&.3()-1)8(018%(215)

^!7-#$'#-%! 7.11%! <%&1#18'! '$! <-#.-! +$! .-,+#I%!S?3!<%$!%1! <%&'<8%-'1!5':#&#5%1!&%!'T'$7O%B!?%$%!1'-;!<-#.5.!+$.!0.1'!5'!<%&'<8%-'1!.7'&.12!1'$!,+.O,+'-!$]5#.2!&E%!b!&'<'11;-#%!5':#&#-!.!1'VE%!!"#$B!('I'@1'!.7'&.1!<-#.-!+$.!1'VE%!+"))&+-"%S/*&2!<%$!%1!<%&'<8%-'1!,+'!1'-E%!+8#O#).5%1!7'O%!7-%P-.$.B!2345678&%*(")9:0;<:7&)+"#()'9:=>?@AABC@0:3D72)+67(#9:(#l#"l#"+[5&)-":777777456)*9:.--,1FFGGG;)+6;"%';!%FHIJK;<FLMNOP%"Q(6&:D77

2.&/#D77772+"))&+-"%S/*&D77777772T@@7"*7+")&+-"%&*7#&8&57*&%7#&Q()(#"*7/Z[(7@@D77772F+"))&+-"%S/*&D72F.&/#D7

72F)+6D7

U!7.-8#-! 5'11'! '1,+'O'8%2! 7%5'@1'! .P%-.! <%7#.-! %1! <%&'<8%-'1! +8#O#).5%1! 7'O%! 'T'$7O%!.&8'-#%-2!<%$7O'8.&5%!%!.-,+#I%!5'!<%&'<8%-'12!.,+#!<Y.$.5%!5'!!3&%!"37%D9+C&!;B!

="55()HJ)E9#(2%"0-()")B"51)-1)8(018%(215)

=.-.!#$7%-8.-!%1!<%&'<8%-'1!7.-.!%!7-%P-.$.!7-#&<#7.O2!+8#O#).@1'!%!'O'$'&8%!(5,"%-S/*&!5'&8-%!5%!'O'$'&8%!+"))&+-"%S/*&2! '$!1+018#8+#VE%!.! 8%5.1!.1!5':#&#Vc'1!5'!<%&'<8%-'1!,+'!.O#!Y.I#.q!2+"))&+-"%S/*&D7

2(5,"%-S/*&7/6(/*9:5&[*I")&+-"%&*:7#"+[5&)-fg=9:+")&+-"%&*O0;)+6:7FD72F+"))&+-"%S/*&D7

.&%&(#&"*%(,&/#0(@,A-%$&96-("&#*#(6*(&%B+/C-#(*D$*%9-#(

=.-.! #$7%-8.-! 0.1'1! 5'! .-,+#I%1! 'T8'-&%12! +8#O#).@1'! %! 'O'$'&8%! (5,"%-S/*&! <%$%! +$!'O'$'&8%! .&#&Y.5%! .%! 'O'$'&8%! <%--'17%&5'&8'! i!0.1'! .! 1'-! #$7%-8.5.B!=.-.! #$7%-8.-!+$.! 0.1'! 5'! -'P#c'12! 7%-! 'T'$7O%2! 5'I'@1'! 5':#&#-! +$! (5,"%-S/*&! 5'&8-%! 5%! 'O'$'&8%!%&'(")S/*&q!2%&'(")S/*&D7

2(5,"%-S/*&7/6(/*9:%&'("&*M"+[5&)-/%(":77777777777777#"+[5&)-fg=9:!/*&g&'("&*M"+[5&)-/%(";)+6:7FD7

2F%&'(")S/*&D7

^!'O'$'&8%!(5,"%-S/*&77%11+#!%1!1'P+#&8'1!.8-#0+8%1q!

! /6(/*: "apelido" do arquivo importado. Trata-se do nome que será utilizado como

prefixo para se referir aos elementos importados, no formato

80%;(23O(2P23P%;%)%&"3P()037"823. No caso do exemplo, a base de conectores foi

importada com o /6(/* )%'D?3&%!"37%D. Para se referir ao conector 3&H&2G"30 dentro do

arquivo importado, deve-se utilizar a string )%'D?3&%!"37%DO3&H&2G"30.

! #"+[5&)-fg=: a localização e nome do arquivo que contém a base a ser importada.

Nesse exemplo, como o arquivo de conectores está no mesmo diretório que o

arquivo do programa, bastou definir apenas o nome do arquivo.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!J! Z18'! 5%<+$'&8%! <Y.$.! 5'! v7-%P-.$.! 7-#&<#7.Ov! %! .-,+#I%!S?3! 7%-! %&5'! %! 7-%P-.$.! <%$'V.! .! 1'-!'T'<+8.5%B!

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! !

! %&'("): no caso de o arquivo importado conter uma base de regiões, define qual

região do programa que conterá as regiões importadas.

F.O'! %01'-I.-! ,+'2! ,+.&5%! +$.! 0.1'! 5'! 5'1<-#8%-'1! b! #$7%-8.5.2! .1! -'P#c'1! 1E%!#$7%-8.5.1! .+8%$.8#<.$'&8'B! Z$! %+8-.1! 7.O.I-.12! ,+.&5%! Y;! +$! (5,"%-S/*&! &.! 1'VE%!#&*+%(,-"%S/*&2!&E%!b!&'<'11;-#%! :.)'-!%!(5,"%-S/*&!<%--'17%&5'&8'!i1! -'P#c'1!&.!1'VE%!%&'(")S/*&2!,+'!7%5'!:#<.-!I.)#.B!

="55()*J)N(-.6.8"0-()(5)1'(5)#"2")&%.'.7"2)(5)8(018%(215).9#(2%"-(5)

?%$%! 5#8%! .&8'-#%-$'&8'2! 7.-.! +8#O#).-! %1! <%&'<8%-'1! 5':#&#5%1! &%! .-,+#I%! #$7%-8.5%2!5'I'@1'! .O8'-.-2! '$! <.5.! 6()h2! .! -':'-D&<#.! .%! <%&'<8%-! <%--'17%&5'&8'! 7.-.! #&<O+#-! %!/6(/*!5.!0.1'!5'!<%&'<8%-'1!#$7%-8.5.2!&%!:%-$.8%!8;(8DP28P68D%O(2P23P!3&%!"37q!26()h74+"))&+-"%9:5&[*I")&+-"%&*m")S&'()>-/%-M&6/$:D7;;;726()h74+"))&+-"%9:5&[*I")&+-"%&*m")L)#>-",:D7;;;726()h74+"))&+-"%9:5&[*I")&+-"%&*m")L)#>-/%-:D7;;;726()h74+"))&+-"%9:5&[*I")&+-"%&*m")j&$>&6&+-(")>-",:D7;;;7

Exemplo 05 ! Sincronizando uma imagem com um trecho de vídeo (âncoras) ?%$%!<%&8#&+.VE%!5%!'T'$7O%!.&8'-#%-2!'18.!1'VE%!.7-'1'&8.!+$!7-%P-.$.!,+'2!

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! (#: identificador único da âncora

! !&'(): início da âncora, em segundos, no formato "99.9s" (atributo válido para

mídias contínuas)

! &)#: término da âncora, em segundos, no formato "99.9s" (atributo válido para

mídias contínuas)

! Q(%*-: início da âncora, em quadros (atributo válido para mídias contínuas)

! 6/*-: término da âncora, em quadros (atributo válido para mídias contínuas)

! -&4-: texto da âncora no arquivo de origem (atributo válido para mídias de texto)

! ,"*(-("): posição do texto da âncora no arquivo de origem (atributo válido para

mídias de texto)

! +""%#*: coordenadas em pixels dos vértices do polígono que determina a âncora

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! /)+."%J/!&6: identificador da âncora no arquivo de origem, tal como interpretado

pela ferramenta de exibição.

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Figura 3.19. Visão estrutural do exemplo 7.

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Exemplo 08 ! Navegando com as setas do controle remoto e selecionando um item de menu com a tecla de ativação (O K) Z18'!'T'$7O%!.<-'1<'&8.!<%$7%-8.$'&8%!5'!&.I'P.VE%!.%1! #8'&1!5'!$'&+!5%!'T'$7O%!.&8'-#%-B!^! #8'$! '$! :%<%! 8'$! +$.! 1+.! #$.P'$! .O8'-.5.! '! +$.!$%O5+-.! .<-'1<'&8.5.!7.-.!-':O'8#-!,+.O!1'-#.!%!#8'$!.8#I.5%!.%!7-'11#%&.-!%!0%8E%!5'!.8#I.VE%![^u2!Z&8'-!%+!',+#I.O'&8'\B!r+.&5%!%!+1+;-#%! 1'O'<#%&.-!%!7-#$'#-%! #8'$!5%!$'&+2!%!7-%P-.$.!5'I'!#&#<#.-! +$! 7-%P-.$.! S?3! 5':#&#5%! &+$! .-,+#I%! 1'7.-.5%B! ^! 7-%P-.$.! #$7%-8.5%!<%&1#18'! 5'! +$! I]5'%! '$! 8'O.! #&8'#-.! <%$! g! O'P'&5.1! 1#&<-%&#).5.1! .! 5'8'-$#&.5%1!8-'<Y%1!5%!I]5'%B!^!.-,+#I%!#$7%-8.5%!<Y.$.@1'!073*+9+C&!;B!

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.&%&(#&"*%(,&/#0(&$%/"+$-#(6*(6*#'%/$-%(%*?&'/-9&6-#('-,(9&C*1&FG-(! Q"+[*=)#&4: define um índice de navegação para o objeto de mídia associado ao

descritor. Caso não seja definido um índice, o objeto de mídia não poderá receber o

foco da navegação. O foco inicial estará no objeto com Q"+[*=)#&4 menor. Vale

observar que o valor de Q"+[*=)#&4 não é necessariamente um número e, nesse caso,

"menor" significa lexicograficamente menor.

! Q"+[*S"%#&%I"6"%: define a cor da moldura que destaca o elemento em foco, ou seja,

do retângulo que deve aparecer sobrescrito à região deste descritor quando o objeto a

ele associado receber o foco. Pode ser um dos seguintes valores: G.(-&^7 !6/+h^7*(68&%^7 '%/$^7 %&#^7 5/%"")^7 Q[+.*(/^7 ,[%,6&^7 6(5&^7 '%&&)^7 $&66"G^7 "6(8&^7 !6[&^7

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! Q"+[*S"%#&%r(#-.: define a espessura, em pixels, da moldura deste descritor quando o

elemento a ele associado receber o foco. Caso seja igual a 0, nenhuma borda será

apresentada. Um valor positivo indica que a borda estará fora do conteúdo do objeto,

ao passo que um valor negativo indica que a borda será desenhada sobre o conteúdo

do objeto.

! Q"+[*S"%#&%N%/)*,/%&)+$: define a porcentagem de transparência da moldura. Deve

ser um valor real entre 0 e 1 (ou um valor em porcentagem, entre 0 e 100%), onde 0

significa totalmente opaco e 1 significa totalmente transparente.

! Q"+[*>%+: define o caminho de uma mídia alternativa que deve ser exibida quando o

elemento associado a este descritor estiver com o foco. Segue o mesmo formato do

atributo *%+ do elemento 5&#(/.

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!!

! Q"+[*>&6>%+: define o caminho de uma mídia alternativa que deve ser exibida quando

for pressionado a tecla de ativação (OK, Enter ou equivalente) enquanto o elemento

associado a este descritor estiver com o foco. Segue o mesmo formato do atributo

*%+ do elemento 5&#(/.

! *&6S"%#&%I"6"%: define uma cor de moldura que deve ser exibida quando for

pressionada a tecla de ativação (OK, Enter ou equivalente) enquanto o elemento

associado a este descritor estiver com o foco

! 5"8&J&Q-: identifica o índice de navegação do elemento E que deve receber o foco

caso seja pressionada a seta para a esquerda do controle remoto enquanto o elemento

associado a este descritor estiver com o foco (definido pelo atributo Q"+[*=)#&4 do

elemento E). Caso o elemento que receberia o foco esteja com 8(*(!6& igual a V8;D%, o

foco não se desloca. Os atributos moveRight, moveUp e moveDown são análogos,

considerando as setas para cima, para baixo e para a direita, respectivamente.

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Page 45: TV digital interativa no Brasil se faz com Ginga

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87R'(43-%#%)0;3XC&!;-

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F.O'!%01'-I.-!,+'2!.7'1.-!5'!%!<%&'<8%-!3&K%LG%;%!"(3&G"87"G"30!7%5'-!-'<'0'-!+$!I.O%-!5'!8'<O.! 8:%!;8! <%$%! 7.-d$'8-%2! <.1%! '11'! I.O%-! &E%! 1'e.! 7.11.5%2! %! <%&'<8%-! .11+$'! %!<%$7%-8.$'&8%!5'!")>&6&+-(")!1'$!8'<O.!5':#&#5.2!%+!1'e.2!5'!1'O'VE%!1%0-'!%!'O'$'&8%!'$!:%<%!.8-.Ib1!5.!8'<O.!5'!.8#I.VE%![^u2!ZSWZA!%+!',+#I.O'&8'\B!

Exemplo 09 !Alternando a visibilidade da legenda Z18'! 'T'$7O%! $%5#:#<.! %! 'T'$7O%! .&8'-#%-! 7.-.! 7'-$#8#-! .%! +1+;-#%! .O8'-&.-! .!I#1#0#O#5.5'! 5.! O'P'&5.! 7-'11#%&.&5%! .! 8'<O.! .$.-'O.! [YHZZ[\\! 5%! <%&8-%O'! -'$%8%B!^!.-,+#I%!$%5#:#<.5%!b!%!.-,+#I%!#$7%-8.5%!073*+9.C&!;B!

S'11'!'T'$7O%2!%!7-%P-.$.!5'I'!vP+.-5.-v!%!I.O%-!5'!I#1#0#O#5.5'!5.!O'P'&5.B!^!-'<+-1%! ,+'! .! S?3! :%-&'<'! 7.-.! P+.-5.-! I.O%-'1! 5'! 7-%7-#'5.5'1! 5':#&#5.1! 7'O%!7-%P-.$.! b! +$! &X! 5'! $]5#.! '17'<#.O2! 5%! 8#7%! /,,6(+/-(")F4@'()'/@*&--()'*2! 8.$0b$!<Y.$.5%! &X! $*))#,4$B! ('I'@1'! 5':#&#-! <.5.! 7-%7-#'5.5'! 5%! &X! $*))#,4$! 5'! $.&'#-.!.&;O%P.! i1! 7-%7-#'5.5'1! 5'! $]5#.1! ,+'! 7-'<#1.$! 1'-! $.&#7+O.5.12! '! ,+'! 5'I'$! 1'-!5':#&#5.1!'T7O#<#8.$'&8'!5'&8-%!5.!5':#&#VE%!5.!$]5#.!<%--'17%&5'&8'B!

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[.8-.Ib1! 5%! 'O%! ,+'! +8#O#).! %! <%&'<8%-! 3&H&2G"30N\B! r+.&5%! +$.! d&<%-.! b! #&#<#.5.2! %!7-%P-.$.! 8'18.! %! I.O%-! 5.! 7-%7-#'5.5'! ;%*%&28! '2! <.1%! 1'e.! ;(*8282! 'T#0'! .! O'P'&5.B!S%!8b-$#&%! 5'! <.5.! d&<%-.2! .! O'P'&5.! <%--'17%&5'&8'! b! 8'-$#&.5.B! r+.&5%! %! +1+;-#%!7-'11#%&.!%!0%8E%!.$.-'O%! [YHZZ[\\!5%!<%&8-%O'!-'$%8%!5+-.&8'!.!'T#0#VE%!5.!#$.P'$!7.-.!5'1O#P.-!O'P'&5.![()*Z%*%&28W%D;(*87\2!%!I.O%-!5.!7-%7-#'5.5'!;%*%&28!b!.O8'-.5%!7.-.!2%D;(*8282!'!.1!$]5#.1!<%--'17%&5'&8'1!.!O#P.-!'!5'1O#P.-!O'P'&5.!1E%!8-%<.5.1B!r+.&5%!%!

Page 46: TV digital interativa no Brasil se faz com Ginga

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body

onBeginPropertyTestStarttestaProp legenda=ligada

onEndStop

video1

onBeginPropertyTestStarttestaProp legenda=ligada

onEndStop

onBeginPropertyTestStarttestaProp legenda=ligada

onEndStop

pVideo1

legenda1

legenda2

legenda3

imgLegenda

Ligar

imgLegenda

Desligar

onBeginStart

stop

start

set legenda=desligada

noSettings

legenda ligada

onKeySelection-SetStartStopDelay

onSelection key=YELLOW

stop

start

set legenda=ligada

onEndStopNstop

stop

onKeySelection-SetStartStopDelay

onSelection key=YELLOW

Figura 3.20. Visão estrutural do exemplo 09.

="55()DJ)@16.0.0-()&9")21/.G(<)&9)-1582.%(2)1)"5)9$-."5)-1).9"/19)-1)"'%12"FG()-")'1/10-")

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Page 47: TV digital interativa no Brasil se faz com Ginga

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Tabela 3.9. Definição do conector !"+",'(!-..

?X5#P%!S?3q! 2+/[*/6I"))&+-"%7(#9:")L)#>-",H:D7772*(5,6&I")#(-(")7%"6&9:")L)#:FD7772*(5,6&b+-(")7%"6&9:*-",:75/49:[)!"[)#&#:FD72F+/[*/6I"))&+-"%D7

3'#8+-.q! r+.&5%!%!&X!O#P.5%!.%!7.7'O!")L)#78'-$#&.-2!!8'-$#&.!%1!&X1!O#P.5%1!.%!7.7'O!*-",B!

="55()VJ)@16.0.0-()()1'()-()8(018%(2)U&1)%129.0")"5).9"/105)-1)'./"2)1)-15'./"2)'1/10-")U&"0-()()3$-1()%129.0")

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="55()WJ)@16.0.0-()()8(018%(2)U&1)%15%")()3"'(2)-")#2(#2.1-"-1)'1/10-")

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Tabela 3.10. Conector onBeginPropertyTestStart.

?X5#P%!S?3q!

2+/[*/6I"))&+-"%7(#9:")S&'()P%",&%-$N&*->-/%-:D77772+"))&+-"%P/%/57)/5&9:"O/6"%:FD77772+"5,"[)#I")#(-(")7",&%/-"%9:/)#:D77777772*(5,6&I")#(-(")7%"6&9:")S&'():7FD77777772/**&**5&)->-/-&5&)-7+"5,/%/-"%9:&Z:D77777777772/--%(![-&b**&**5&)-7%"6&9:-&*-/P%",:77777777777777&8&)-N$,&9:/--%(![-("):7/--%(![-&N$,&9:)"#&P%",&%-$:FD777777777728/6[&b**&**5&)-78/6[&9:k"O/6"%:FD77777772F/**&**5&)->-/-&5&)-D77772F+"5,"[)#I")#(-(")D77772*(5,6&b+-(")7%"6&9:*-/%-:7FD72F+/[*/6I"))&+-"%D7

3'#8+-.q! r+.&5%!.!$]5#.!&%!7.7'O!")S&'()!#&#<#.2!<.1%!.!7-%7-#'5.5'!O#P.5.!.%!7.7'O!"%D"8E730! 7%11+.!I.O%-! #P+.O! [&Z\! .%!7.-d$'8-%!398;372! #&#<#.!%!&X! O#P.5%!.%!7.7'O!*-/%-B!

Page 48: TV digital interativa no Brasil se faz com Ginga

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Page 49: TV digital interativa no Brasil se faz com Ginga

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Page 50: TV digital interativa no Brasil se faz com Ginga

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Page 51: TV digital interativa no Brasil se faz com Ginga

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Page 52: TV digital interativa no Brasil se faz com Ginga

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Page 54: TV digital interativa no Brasil se faz com Ginga

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