X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;ds=sidebyside;f=index.html;h=dec5f13d9933b6c39eae07d89e70a50663a94ec9;hb=52b286d5570447d1e4d9b4e70e8639d2e0db3fc3;hp=cdc8db5702d554d4b5018dba2d35dcf828fbdef2;hpb=3c4520bf24e7c124fb3117785afc3d8a58c4c3f9;p=lca-dvswitch.git

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index cdc8db5..dec5f13 100644
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@@ -219,6 +219,12 @@
       </ul>
     </li>
   </ul>
+  <div class="handout">
+    <p>
+      DIF is the DV Interchange Format, sometimes referred to as 'raw
+      DV' although it is a container format in its own right.
+    </p>
+  </div>
 </div>
 
 <div class="slide">
@@ -256,5 +262,27 @@
   <object data="screenshot-1-annotated.png" width="50%"></object>
 </div>
 
+<div class="slide">
+  <h1>Mixer internals</h1>
+  <object data="dvswitch-internal.svg" width="90%" height="90%"></object>
+  <div class="handout">
+    <p>
+      To simplify the diagram, I omitted connection setup, tally light
+      and recording control, and the internal sinks that haven't been
+      implemented yet.
+    </p>
+    <p>
+      All these interfaces have limited-length queues.  If a queue
+      fills up, frames have to be dropped - we must not block or use
+      unlimited memory!
+    </p>
+    <p>
+      The mixer clock thread maintains a frame clock at about 25 or
+      30&nbsp;Hz depending on the video system, constantly adjusted to
+      follow the audio source.
+    </p>
+  </div>
+</div>
+
 </body>
 </html>