Add incomplete design doc.

1 files changed, 805 insertions, 0 deletions

diff --git a/doc/design/dcpomatic.svg b/doc/design/dcpomatic.svg
new file mode 100644
index 000000000..3d1cc7b94
--- /dev/null
+++ b/doc/design/dcpomatic.svg
@@ -0,0 +1,805 @@
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+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
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+        <dc:title></dc:title>
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+         x="178"
+         height="139"
+         width="139"
+         id="rect2985"
+         style="color:#000000;fill:none;stroke:#0000ff;stroke-width:0.99999988px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate" />
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+         id="text2987"
+         y="169.8515"
+         x="187"
+         style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#0000ff;fill-opacity:1;stroke:none;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
+         xml:space="preserve"><tspan
+           y="169.8515"
+           x="187"
+           id="tspan2989"
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+         height="24"
+         width="139"
+         id="rect2991"
+         style="color:#000000;fill:none;stroke:#0000ff;stroke-width:0.99999988px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate" />
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+         id="text2993"
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+         x="186.95799"
+         style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#ff0000;fill-opacity:1;stroke:none;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
+         xml:space="preserve"><tspan
+           y="194.74094"
+           x="186.95799"
+           id="tspan2995"
+           sodipodi:role="line">get_video()</tspan><tspan
+           id="tspan2997"
+           y="212.24094"
+           x="186.95799"
+           sodipodi:role="line">get_audio()</tspan></text>
+      <text
+         sodipodi:linespacing="125%"
+         id="text2999"
+         y="226.66934"
+         x="187.10799"
+         style="font-size:8px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#008000;fill-opacity:1;stroke:none;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
+         xml:space="preserve"><tspan
+           y="226.66934"
+           x="187.10799"
+           id="tspan3001"
+           sodipodi:role="line">Get a video frame or a section of</tspan><tspan
+           id="tspan3003"
+           y="236.66934"
+           x="187.10799"
+           sodipodi:role="line">audio from a time range given in</tspan><tspan
+           id="tspan3009"
+           y="246.66934"
+           x="187.10799"
+           sodipodi:role="line"><tspan
+   id="tspan3011"
+   style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;fill:#008000;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono">DCPTime</tspan>.</tspan></text>
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+         y="101.05739"
+         x="372.08694"
+         style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#0000ff;fill-opacity:1;stroke:none;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
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+      <rect
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+         width="139"
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+         style="color:#000000;fill:none;stroke:#0000ff;stroke-width:0.99999988px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate" />
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+         x="369.38266"
+         style="font-size:8px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:125%;letter-spacing:0px;word-spacing:0px;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#008000;fill-opacity:1;fill-rule:nonzero;stroke:none;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
+         xml:space="preserve"><tspan
+           y="121.9117"
+           x="369.38266"
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+           sodipodi:role="line">Video that has come out of a player</tspan><tspan
+           id="tspan3096"
+           y="131.9117"
+           x="369.38266"
+           sodipodi:role="line">except with the bits still in their</tspan><tspan
+           id="tspan3098"
+           y="141.9117"
+           x="369.38266"
+           sodipodi:role="line">raw form (we may want to combine</tspan><tspan
+           id="tspan3102"
+           y="151.9117"
+           x="369.38266"
+           sodipodi:role="line">the bits on a remote machine, or</tspan><tspan
+           id="tspan3104"
+           y="161.9117"
+           x="369.38266"
+           sodipodi:role="line">maybe not bother to combine them</tspan><tspan
+           id="tspan3100"
+           y="171.9117"
+           x="369.38266"
+           sodipodi:role="line">at all). <tspan
+   id="tspan3212"
+   style="font-style:italic;-inkscape-font-specification:'Latin Modern Roman, Italic'"> Note: no timing</tspan></tspan><tspan
+           id="tspan3214"
+           y="181.9117"
+           x="369.38266"
+           sodipodi:role="line"><tspan
+             id="tspan3216"
+             style="font-style:italic;-inkscape-font-specification:'Latin Modern Roman, Italic'">information.</tspan></tspan></text>
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+         x="368.44266"
+         style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:125%;letter-spacing:0px;word-spacing:0px;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#ff0000;fill-opacity:1;fill-rule:nonzero;stroke:none;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
+         xml:space="preserve"><tspan
+           y="200.65807"
+           x="368.44266"
+           id="tspan3132"
+           sodipodi:role="line">image()</tspan></text>
+      <text
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+         id="text3155"
+         y="214.6459"
+         x="369.25467"
+         style="font-size:8px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:125%;letter-spacing:0px;word-spacing:0px;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#008000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
+         xml:space="preserve"><tspan
+           y="214.6459"
+           x="369.25467"
+           id="tspan3157"
+           sodipodi:role="line">Return image ready for the DCP</tspan><tspan
+           id="tspan3159"
+           y="224.6459"
+           x="369.25467"
+           sodipodi:role="line">(scaled, cropped, subtitled etc.)</tspan></text>
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+             sodipodi:role="line"
+             x="394.47705"
+             y="146.88008"
+             id="tspan2997-9">get_video()</tspan></text>
+        <text
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+           style="font-size:8px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#008000;fill-opacity:1;stroke:none;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
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+             sodipodi:role="line"
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+    <text
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+       style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#ff0000;fill-opacity:1;stroke:none;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
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+         sodipodi:role="line"
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+    <text
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+       style="font-size:8px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#008000;fill-opacity:1;stroke:none;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
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+         sodipodi:role="line"
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+         y="281.15213"
+         id="tspan3009-0-9">Get some audio frames (specified as</tspan><tspan
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+         x="468.35236"
+         y="291.15213"
+         id="tspan6126-9">frame indices) from this decoder's</tspan><tspan
+         sodipodi:role="line"
+         x="468.35236"
+         y="301.15213"
+         id="tspan6300">content.</tspan></text>
+    <path
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+    <text
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
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+         sodipodi:role="line"
+         x="460.94891"
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+    <text
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+       style="font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:125%;letter-spacing:0px;word-spacing:0px;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#ff0000;fill-opacity:1;fill-rule:nonzero;stroke:none;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
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+         sodipodi:role="line"
+         id="tspan6666"
+         x="467.82877"
+         y="474.45602">Player::dcp_to_content_video()</tspan><tspan
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+         x="467.82877"
+         y="491.95602"
+         id="tspan6680">Player::dcp_to_content_audio()</tspan></text>
+    <text
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
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+    <text
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+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;opacity:0.93999999;fill:#0000ff;fill-opacity:1;stroke:none;font-family:Latin Modern Mono;-inkscape-font-specification:Latin Modern Mono"
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan2989-6-1"
+         x="1023.8565"
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+    <text
+       xml:space="preserve"
+       style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#800000;fill-opacity:1;stroke:none;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan5905"
+         x="1023.8365"
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+         x="1023.8365"
+         y="253.70003"
+         id="tspan5907">e.g. frame rate, J2K bandwidth </tspan></text>
+    <text
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+       style="font-size:24px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0;text-align:start;text-decoration:none;line-height:125%;letter-spacing:0px;word-spacing:0px;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;text-anchor:start;baseline-shift:baseline;color:#000000;fill:#800000;fill-opacity:1;fill-rule:nonzero;stroke:none;marker:none;visibility:visible;display:inline;overflow:visible;enable-background:accumulate;font-family:Latin Modern Roman;-inkscape-font-specification:Latin Modern Roman"
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
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+         x="1025.1324"
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+    <text
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+       sodipodi:linespacing="125%"><tspan
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+    <text
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
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