create png waveform from audio file with c++ then upload to php -

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i have been reading lot developing function can output png image audio file using c++, upload web server using php, later use on website similar how soundcloud used it.

however, have come across no examples or documents on how this, , pretty baffled on start.

i have fair amount of knowledge when comes php, , minor knowledge in c++.

i have found few js scripts job, however, canvas's used draw out shape of waveforms must loaded when user lands on page, , on it's own drain on server, , takes way long on users end (hence reason want use png's instead).

wavesurfer example

obviously not going easy feat, , i'm not expecting write out whole script this, able write out sample script me understanding on start?


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