Linux Kernel it is!
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Repo: https://github.com/torvalds/linux
File: /sound/firewire/amdtp-stream.c
When you are ready, start typing!
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unsigned int sfc;
for (sfc = 0; sfc < ARRAY_SIZE(amdtp_rate_table); ++sfc) {
   if (amdtp_rate_table[sfc] == rate)
}
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