On Tue, Nov 29, 2005 at 11:14:51PM +0100, Martin Dauskardt wrote:

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Date: Mon, 28 Nov 2005 20:30:20 +0100 From: Sascha Volkenandt lists@magoa.net Subject: Re: [vdr] RE: [ANNOUNCE] VDR developer version 1.3.37 To: VDR Mailing List vdr@linuxtv.org

On Monday 28 November 2005 07:34, Martin Dauskardt wrote:

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I recognized that channel switching to an AC3-channel goes much

faster with

...

Live-AC3, when you comment out some lines in transfer.c and dvbosd.c to turn off the buffer reserve :

// #define FW_NEEDS_BUFFER_RESERVE_FOR_AC3 // #ifdef FW_NEEDS_BUFFER_RESERVE_FOR_AC3 //XXX This is a very ugly hack to allow cDvbOsd to reduce

the buffer

...

 //XXX requirements in cTransfer if it detects a 4MB full

featured DVB

...

card. extern bool DvbCardWith4MBofSDRAM; DvbCardWith4MBofSDRAM = osdMem >= 1000000; // #endif

Sorry for complaining, but with these three lines commented, the code does exactly the same as the original code (it even compiles to the same object code). Maybe this mail is missing the patched part in transfer.c? Or am I missing something? :-)

no, there is nothing wrong.

Try it, it works. Channel switching to an AC3-channel becomes much faster.

The trick is that if FW_NEEDS_BUFFER_RESERVE_FOR_AC3 is not defined the later code in cTransfer::Action() used only with this cpp macro defined, will not executed. The boolean DvbCardWith4MBofSDRAM is set to false but never used anymore.

Werner