[hamradio-commits] [dump1090] 70/389: Create a preamble pointer in the message detector loop

[Matthew Ernisse]

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mernisse-guest pushed a commit to branch master
in repository dump1090.

commit 09af545933bd445a3cb0b559016f2ac3a49b5116
Merge: 316b456 70031e1
Author: Malcolm Robb <Support at ATTAvionics.com>
Date:   Wed Apr 10 01:12:50 2013 +0100

    Create a preamble pointer in the message detector loop
    
    Create a preamble pointer in the message detector loop
    
    Create a pointer, pPreamble, which points to the start of the preamble
    in the analogue sample buffer m[]. So pPreamble = &m[p] Then use this
    pointer to perform the preamble detection tests.  It should save a few
    cpu cycles per test because accessing pPointer[2] should be quicker than
    m[p+2].
    
    Also move the decision on whether to try OutOfPhase correction to the
    end of the first pass, rather than automatically going into phase
    correction if the first pass fails. This saves two memcpy's if the
    decision in the second pass is to not do phase correction.

 dump1090.c | 76 +++++++++++++++++++++++++++++---------------------------------
 1 file changed, 35 insertions(+), 41 deletions(-)

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