[mythtv] [PATCH] Enable recording of encrypted channels without decrypting them first.

[James Courtier-Dutton]

On 9 July 2010 12:47, Janne Grunau <janne-mythtv at grunau.be> wrote:
> On Fri, Jul 09, 2010 at 10:09:01AM +0100, Stuart Auchterlonie wrote:
>> On 09/07/2010 01:42, James Courtier-Dutton wrote:
>> > Hi,
>> >
>> > Here is a patch that lets one record encrypted channels without
>> > decrypting them first.
>> > It also includes the ECM PID so that the recording can be later
>> > decrypted at playback time.
>> > The main advantage of this is that one can then record as many
>> > encrypted channels as one has tuners, and then later, using the
>> > correct smart card, decrypt them while playing them back.
>> > In this way, you only have to decrypt one channel at a time.
>> >
>> > I would be interested to find out if this patch breaks anything.
>> >
>> > Kind Regards
>> >
>>
>> I may be missing something. but what is the point of creating
>> ProcessEncTSPacket ???
>>
>> An encrypted TS packet isn't any different from a normal TS packet
>> apart from the data portion being encrypted, as such the ProcessTSPacket
>> could be used instead?
>
> There is one important difference: the payload is encrypted.
> ProcessTSPacket() looks at the payload for keyframes.
>

That is exactly why I had to add a new function.