[Boost-users] state machine frequence detecting

Subject: [Boost-users] state machine frequence detecting
From: Kraus Philipp (philipp.kraus_at_[hidden])
Date: 2012-07-22 11:34:41

Hello,

I need an idea for detecting frequencies. I have got an audio signal and I would check if a sequence of frequences are in the signal eg:
I have got this frequencies: 100Hz, 600Hz, 800Hz, so I would create a statemachine that accepts this sequence of frequencies like

frequence statemachin st;

for each audio sample
        if signal has st.getFrequence then
                    st.next
        else
                st.reset

        if st.final then
                   accept

Frequences and the order of the frequences are stored in a configuration file, so the state machine can have a lot of
states. In some cases I can have got something like

100Hz, 600Hz, 800Hz, delay, 100Hz, 600Hz, 800Hz
|        1                             |           |            2                          |

So the sequence must be accepted if one of the frequence block (1 || 2) is in the final state.
I have read the howto about the Boost finale statemachine, but I can not make a decision
if the Boost statemaschine is the correct structure to solve this problem. 

Can anyone help me to discuss the pro / cons for the Boost statemachine in this case?
Thanks a lot

Phil