Reply to thread

Message

<blockquote data-quote="morpheus_xx" data-source="post: 1282065" data-attributes="member: 48495">It is a long time since I touched TV part and descrambling support, so I might remember not correctly...There exists 2 kind of information to tell the CAM what it should decode:<ol>
<li data-xf-list-type="ol">Either a PMT (Program main table), which contains a list of all PIDs to decode (stream IDs, video, audio, teletext...)</li>
<li data-xf-list-type="ol">Or a CaPMT, which is more a command to tell the CAM &quot;add those streams to your decode list&quot; or &quot;remove those streams&quot;.</li>
</ol>The 1st way is probably used in TVE code for DD CAM: The tuner instances share one common CAM. This could explain why a 2nd tuner overwrites with its PMT the current descramble information.The 2nd way should work better, because it hands off the handling of PID lists to the CAM as the TVE code only sends differences and does not neccessary need to know the other tuner's requests.Could you maybe ask about the way it is working correctly inside the DD tools?</blockquote>

[QUOTE="morpheus_xx, post: 1282065, member: 48495"] It is a long time since I touched TV part and descrambling support, so I might remember not correctly... There exists 2 kind of information to tell the CAM what it should decode: [LIST=1] [*]Either a PMT (Program main table), which contains a list of all PIDs to decode (stream IDs, video, audio, teletext...) [*]Or a CaPMT, which is more a command to tell the CAM "add those streams to your decode list" or "remove those streams". [/LIST] The 1st way is probably used in TVE code for DD CAM: The tuner instances share one common CAM. This could explain why a 2nd tuner overwrites with its PMT the current descramble information. The 2nd way should work better, because it hands off the handling of PID lists to the CAM as the TVE code only sends differences and does not neccessary need to know the other tuner's requests. Could you maybe ask about the way it is working correctly inside the DD tools? [/QUOTE]

Verification