% Copyright 2003--2007 by Till Tantau
% Copyright 2010 by Vedran Mileti\'c
% Copyright 2011,2012,2015 by Vedran Mileti\'c, Joseph Wright
% Copyright 2017,2018 by Louis Stuart, Joseph Wright
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file LICENSE.md for more details.

\ProvidesPackage{multimedia}[2012/05/02 ver 0.02]
\NeedsTeXFormat{LaTeX2e}[1995/12/01]


\RequirePackage{keyval}[1997/11/10]

\RequirePackage{ifpdf}

\ifx\directlua\@undefined
  \let\beamer@pdfpageattr\pdfpageattr
  \let\beamer@pdfobj\pdfobj
  \let\beamer@pdfrefobj\pdfrefobj
  \let\beamer@pdflastobj\pdflastobj
  \let\beamer@pdfannot\pdfannot
  \let\beamer@pdfstartlink\pdfstartlink
  \let\beamer@pdfendlink\pdfendlink
\else %
  \edef\beamer@pdfpageattr{\pdfvariable pageattr}
  \protected\def\beamer@pdfobj{\pdfextension obj }
  \protected\def\beamer@pdfrefobj{\pdfextension refobj }
  \protected\def\beamer@pdflastobj{\numexpr\pdffeedback lastobj\relax}
  \protected\def\beamer@pdfannot{\pdfextension annot }
  \protected\def\beamer@pdfstartlink{\pdfextension startlink }
  \protected\def\beamer@pdfendlink{\pdfextension endlink\relax}
\fi

\ifpdf
  \let\mm@psorpdf\@secondoftwo
\else
  \let\mm@psorpdf\@firstoftwo
  \PassOptionsToPackage{pdfmark}{hyperref}
  \define@key{PDF}{Movie}{\pdf@addtoks{#1}{Movie}}
  \define@key{PDF}{T}{\pdf@addtoks{#1}{T}}
  \define@key{PDF}{Annotations}{\pdf@addtoks{#1}{A}}
\fi

\define@key{multimedia}{automute}[true]{\csname mm@autostop#1\endcsname}
\define@key{multimedia}{autostart}[true]{\csname mm@autostart#1\endcsname}
\define@key{multimedia}{bitspersample}{\def\mm@b{/B #1}}
\define@key{multimedia}{borderwidth}{{\@tempdima=#1\relax\@tempdima=0.99626401\@tempdima\xdef\mm@bw{\strip@pt\@tempdima}}}
\define@key{multimedia}{channels}{\def\mm@c{/C #1}}
\define@key{multimedia}{depth}{\@tempdimc=#1\relax}
\define@key{multimedia}{duration}{\mm@convert#1{\mm@duration}{/Duration}}%
\define@key{multimedia}{encoding}{\def\mm@e{/E /#1}}
\define@key{multimedia}{externalviewer}[]{\mm@externaltrue}
\define@key{multimedia}{height}{\@tempdimb=#1\relax}
\define@key{multimedia}{inlinesound}[true]{\csname mm@inline#1\endcsname}
\define@key{multimedia}{label}{\def\mm@label{#1}}
\define@key{multimedia}{loop}[]{\def\mm@playmode{/Mode /Repeat}\def\mm@repeat{/Repeat true}}
\define@key{multimedia}{mixsound}[true]{\def\mm@mix{/Mix #1}}
\define@key{multimedia}{once}[]{\def\mm@playmode{/Mode /Once}}
\define@key{multimedia}{palindrome}[]{\def\mm@playmode{/Mode /Palindrome}}
\define@key{multimedia}{pause}[]{\def\mm@do{/Operation /Pause}}
\define@key{multimedia}{play}[]{\def\mm@do{/Operation /Play}}
\define@key{multimedia}{poster}[true]{\def\mm@poster{/Poster #1}}
\define@key{multimedia}{repeat}[]{\def\mm@playmode{/Mode /Repeat}\def\mm@repeat{/Repeat true}}
\define@key{multimedia}{resume}[]{\def\mm@do{/Operation /Resume}}
\define@key{multimedia}{samplingrate}{\def\mm@r{/R #1}}
\define@key{multimedia}{showcontrols}[true]{\def\mm@controls{/ShowControls #1}}
\define@key{multimedia}{start}{\mm@convert#1{\mm@start}{/Start}}%
\define@key{multimedia}{stop}[]{\def\mm@do{/Operation /Stop}}
\define@key{multimedia}{width}{\@tempdima=#1\relax}
\define@key{multimedia}{open}[]{\def\mm@playmode{/Mode /Open}}

\def\mm@convert#1s{\mm@@convert{#1}}
\def\mm@@convert#1#2#3{%
  {\@tempdima=#1pt%
  \@tempcnta=\@tempdima%
  \divide\@tempcnta by 512%
  \xdef#2{#3 [\the\@tempcnta\space 128]}}}

\newif\ifmm@autostart
\newif\ifmm@autostop
\newif\ifmm@external
\newif\ifmm@inline
\newcount\mm@movie

\newcommand\movie[3][]{%
  \leavevmode%
  % Sanity check
  \IfFileExists{\@currdir #3}{}{%
    \PackageWarning{multimedia}{The movie file ``#3'' could not be
      found in the current directory, where it must reside for
      viewing.}%
  }%
  {%
    % Calculate size of the poster
    \setbox\@tempboxa=\hbox{#2}%
    \@tempdima=\wd\@tempboxa%
    \@tempdimb=\ht\@tempboxa%
    \@tempdimc=\dp\@tempboxa%
    \global\advance\mm@movie by1\relax%
    \edef\mm@label{mmdefaultlabel\the\mm@movie}%
    \def\mm@playmode{}%
    \def\mm@duration{}%
    \def\mm@start{}%
    \def\mm@poster{}%
    \def\mm@controls{}%
    \mm@autostartfalse%
    \mm@externalfalse%
    \def\mm@bw{0}%
    \setkeys{multimedia}{#1}%
    \wd\@tempboxa=\@tempdima%
    \ht\@tempboxa=\@tempdimb%
    \dp\@tempboxa=\@tempdimc%
    \ifmm@external%
      \href{run:#3}{\box\@tempboxa}%
    \else%
      \mm@psorpdf{%
        \pdfmark[{\box\@tempboxa}]{%
          pdfmark=/ANN,%
          Subtype=/Movie,%
          Movie=<< /F (#3) \mm@poster\space >>,%
          Annotations=<< \mm@start\space \mm@duration\space \mm@playmode\space \mm@controls\space>>,%
          T=(\mm@label),
          Border={0 0 \mm@bw}}%
       }{%
        \beamer@pdfannot width \@tempdima height \@tempdimb depth \@tempdimc
        {
          /Subtype /Movie
          /T (\mm@label)
          /Border [0 0 \mm@bw]
          /Movie << /F (#3) \mm@poster\space >>
          /A << \mm@start\space \mm@duration\space \mm@playmode\space \mm@controls\space >>
        }%
      }%
      \mm@psorpdf{}{\box\@tempboxa}%
      \ifmm@autostart%
      \mm@psorpdf%
      {%
        \pdfmark{pdfmark=/PUT,%
           Raw={{ThisPage} << /AA << /O << /S /Movie
         /T (\mm@label) /Operation /Play >> >> >>}%
      }}%
      {%
        \immediate\beamer@pdfobj {<< /S /Movie /T (\mm@label) /Operation /Play >>}%
        \beamer@pdfannot width 0pt height 0pt depth 0pt {%
          /Subtype/Widget
          /FT/Btn/Ff 65537
          /T (wid@\mm@label)
          /AA <</PO \the\beamer@pdflastobj\space 0 R>>% attention: /O --> /PO for Widget annots
        }%  
      }%
      \fi%
    \fi%
  }%
}


\newcommand\hyperlinkmovie[3][]{%
  \leavevmode%
  {\def\mm@playmode{}\def\mm@start{}\def\mm@duration{}\def\mm@do{}\def\mm@controls{}%
  \setkeys{multimedia}{#1}%
  \mm@psorpdf{%
    \pdfmark[{#3}]{%
      Color=\@linkbordercolor,%
      linktype={link},%
      AcroHighlight=\@pdfhighlight,%
      Border=\@pdfborder,%
      pdfmark=/ANN,%
      Subtype=/Link,%
      Annotations=<< /S /Movie /T (#2) \mm@controls\space
        \mm@do\space \mm@start\space \mm@duration\space \mm@playmode\space
      >>%
    }}%
    {%
    \beamer@pdfstartlink
    attr{%
      /Border [\@pdfborder]
      /H \@pdfhighlight\space
      /C [\@menubordercolor]%
    }%
    user{
      /Subtype /Link
      /A <<
        /S /Movie /T (#2) \mm@controls\space
        \mm@do\space \mm@start\space \mm@duration\space \mm@playmode\space
      >>
    }%
  #3\beamer@pdfendlink}%
  }%
}


\newcommand\sound[3][]{%
  \mm@psorpdf{\movie[#1]{#2}{#3}}% no way of defining a stream object...
  {%
  \leavevmode%
  % Sanity check
  \IfFileExists{\@currdir #3}{}{%
    \PackageWarning{multimedia}{The movie file ``#3'' could not be
      found in the current directory, where it must reside for
      viewing.}%
  }%
  {%
    % Calculate size of the poster
    \setbox\@tempboxa=\hbox{#2}%
    \@tempdima=\wd\@tempboxa%
    \@tempdimb=\ht\@tempboxa%
    \@tempdimc=\dp\@tempboxa%
    \def\mm@label{mmdefaultlabel}%
    \def\mm@playmode{}%
    \def\mm@duration{}%
    \def\mm@start{}%
    \def\mm@repeat{}%
    \def\mm@mix{/Mix false}%
    \setkeys{multimedia}{samplingrate=44100,channels=1,bitspersample=16,encoding=muLaw}%
    \mm@autostartfalse%
    \mm@autostopfalse%
    \mm@externalfalse%
    \mm@inlinefalse%
    \def\mm@bw{0}%
    \setkeys{multimedia}{#1}%
    \wd\@tempboxa=\@tempdima%
    \ht\@tempboxa=\@tempdimb%
    \dp\@tempboxa=\@tempdimc%
    \ifmm@external%
      \href{run:#3}{\box\@tempboxa}%
    \else%
      \ifmm@inline%
        \beamer@pdfobj stream
        attr {/Type /Sound \mm@r\space \mm@c\space \mm@b\space \mm@e\space}
        file {#3}%
        \beamer@pdfrefobj \beamer@pdflastobj%
      \else
        \beamer@pdfobj stream
        attr {\mm@r\space \mm@c\space \mm@b\space \mm@e\space /F (#3)}
        {}%
        \beamer@pdfrefobj \beamer@pdflastobj%
      \fi%
      \expandafter\xdef\csname mms@\mm@label\endcsname{\the\beamer@pdflastobj}%
      \def\@temp{#2}\ifx\@temp\@empty\else\hyperlinksound[#1]{\mm@label}{\box\@tempboxa}\fi%
      \ifmm@autostart%
        \beamer@pdfobj {<< /S /Sound /Sound \the\beamer@pdflastobj\space 0 R \mm@mix\space >>}%
        \beamer@pdfrefobj\beamer@pdflastobj%
        \xdef\mm@pdfpageadditionalaction{/O \the\beamer@pdflastobj\space 0 R }%
      \fi%
      \ifmm@autostop%
        \beamer@pdfobj {<< /S /Sound /Sound \mms@mute\space 0 R >>}%
        \beamer@pdfrefobj\beamer@pdflastobj%
        \xdef\mm@pdfpageadditionalaction{%
          \ifx\mm@pdfpageadditionalaction\relax\else\mm@pdfpageadditionalaction\fi\space /C \the\beamer@pdflastobj\space 0 R }%
      \fi%
    \fi%
  }%
  }%
}

\mm@psorpdf{}{%
  \beamer@pdfobj stream attr {/R 22050} {}%
  \beamer@pdfrefobj \beamer@pdflastobj%
  \edef\mms@mute{\the\beamer@pdflastobj}
}

\newcommand\hyperlinkmute[1]{\mm@psorpdf{#1}{\hyperlinksound{mute}{#1}}}

\newcommand\hyperlinksound[3][]{%
  \mm@psorpdf{\hyperlinkmovie[#1]{#2}{#3}}%
  {%
  \@ifundefined{mms@#2}%
  {\PackageError{multimedia}{Sound labeled ``#2'' not defined}{}}
  {%
    \leavevmode%
    \def\mm@mix{/Mix false}%
    \def\mm@repeat{/Repeat false}%
    \setkeys{multimedia}{#1}%
    \beamer@pdfstartlink
    attr{%
      /Border [\@pdfborder]
      /H \@pdfhighlight\space
      /C [\@menubordercolor]%
    }%
    user{
      /Subtype /Link
      /A << /S /Sound /Sound \csname mms@#2\endcsname\space 0 R \mm@mix\space \mm@repeat\space >>
    }%
    #3\beamer@pdfendlink}%
  }%
}


% Copyright Notice: The following code is based on code from hyperref.sty
\def\mm@pageadditionalaction{%
  \ifx\mm@pdfpageadditionalaction\relax
  \else
    \expandafter\mm@RemoveAAPageAttr\the\beamer@pdfpageattr^^J/AA{}>>\END
    \ifx\mm@pdfpageadditionalaction\@empty
    \else
      \edef\@processme{%
        \global\beamer@pdfpageattr{%
          \the\beamer@pdfpageattr
          ^^J/AA << \mm@pdfpageadditionalaction\space >>%
        }%
      }%
      \@processme
    \fi
    \global\let\mm@pdfpageadditionalaction=\@empty% not on next page
  \fi
}
\gdef\mm@RemoveAAPageAttr#1^^J/AA#2#3>>#4\END{%
  \ifx\\#2\\%
    \global\beamer@pdfpageattr{#1}%
  \else
    \mm@RemoveAAPageAttr#1#4\END
  \fi
}
\let\mm@pdfpageadditionalaction=\relax

% This is *not* the way to do it, but it'll have to do for now:
\let\mm@orighyper@pagetransition=\hyper@pagetransition
\AtBeginDocument{\def\hyper@pagetransition{\mm@orighyper@pagetransition\mm@pageadditionalaction}}