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<blockquote data-quote="morpheus_xx" data-source="post: 546962" data-attributes="member: 48495">this is the code for patching the PMT for AstonCrypt2. I think that this does only work partitially, maybe more streams/pid need patching too. missing some PIDs might result in a message from CAM, that it was not able to descramble something...[CODE]&nbsp; &nbsp; /// &lt;summary&gt;&nbsp; &nbsp; /// Patches the PMT to force standard AC3 header.&nbsp; &nbsp; /// &lt;/summary&gt;&nbsp; &nbsp; /// &lt;param name=&quot;PMT&quot;&gt;byte array containing the PMT&lt;/param&gt;&nbsp; &nbsp; /// &lt;param name=&quot;pmtLength&quot;&gt;length of the pmt array&lt;/param&gt;&nbsp; &nbsp; /// &lt;param name=&quot;newPmtLength&quot;&gt;The new PMT length&lt;/param&gt;&nbsp; &nbsp; /// &lt;returns&gt;&lt;/returns&gt;&nbsp; &nbsp; private static byte[] PatchPMT_AstonCrypt2(byte[] PMT, int pmtLength, out int newPmtLength)&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; byte[] newPMT = new byte[1024];&nbsp; // create a new array.&nbsp; &nbsp; &nbsp; int ps = 0;&nbsp; &nbsp; &nbsp; int pd = 0;&nbsp; &nbsp; &nbsp; for (int i = 0; i &lt; 12; ++i)&nbsp; &nbsp; &nbsp; &nbsp; newPMT[pd++] = PMT[ps++];&nbsp; &nbsp; &nbsp; for (int i = 0; i &lt; PMT[11]; ++i)&nbsp; &nbsp; &nbsp; &nbsp; newPMT[pd++] = PMT[ps++];&nbsp; &nbsp; &nbsp; // Need to patch audio AC3 channels 0x06, , , , ,0x6A in real AC3 descriptor 0x81, .... for ( at least !) ASTONCRYPT CAM module&nbsp; &nbsp; &nbsp; while ((ps + 5 &lt; pmtLength) &amp;&amp; (pd &lt; 1024))&nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; int len = PMT[ps + 4] + 5;&nbsp; &nbsp; &nbsp; &nbsp; for (int i = 0; i &lt; len; ++i)&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (pd &gt;= 1024)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if ((i == 0) &amp;&amp; (PMT[ps] == 0x06) &amp;&amp; (PMT[ps + 5] == 0x6A)) { newPMT[pd++] = 0x81; ps++; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; else&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; newPMT[pd++] = PMT[ps++];&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; newPmtLength = pd;&nbsp; &nbsp; &nbsp; return newPMT;&nbsp; &nbsp; }[/CODE]Question: Do the CAM messages also occur, if you set the CAM type to default (means no patching)?</blockquote>

[QUOTE="morpheus_xx, post: 546962, member: 48495"] this is the code for patching the PMT for AstonCrypt2. I think that this does only work partitially, maybe more streams/pid need patching too. missing some PIDs might result in a message from CAM, that it was not able to descramble something... [CODE] /// <summary> /// Patches the PMT to force standard AC3 header. /// </summary> /// <param name="PMT">byte array containing the PMT</param> /// <param name="pmtLength">length of the pmt array</param> /// <param name="newPmtLength">The new PMT length</param> /// <returns></returns> private static byte[] PatchPMT_AstonCrypt2(byte[] PMT, int pmtLength, out int newPmtLength) { byte[] newPMT = new byte[1024]; // create a new array. int ps = 0; int pd = 0; for (int i = 0; i < 12; ++i) newPMT[pd++] = PMT[ps++]; for (int i = 0; i < PMT[11]; ++i) newPMT[pd++] = PMT[ps++]; // Need to patch audio AC3 channels 0x06, , , , ,0x6A in real AC3 descriptor 0x81, .... for ( at least !) ASTONCRYPT CAM module while ((ps + 5 < pmtLength) && (pd < 1024)) { int len = PMT[ps + 4] + 5; for (int i = 0; i < len; ++i) { if (pd >= 1024) break; if ((i == 0) && (PMT[ps] == 0x06) && (PMT[ps + 5] == 0x6A)) { newPMT[pd++] = 0x81; ps++; } else newPMT[pd++] = PMT[ps++]; } } newPmtLength = pd; return newPMT; } [/CODE] Question: Do the CAM messages also occur, if you set the CAM type to default (means no patching)? [/QUOTE]

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