Function report

tests/client_deess_test.cpp:23–30

int g_failed = 0;

void report(const char* name, bool ok, const std::string& detail = {})
{
    std::printf("%s %-54s %s\n",
                ok ? "[ OK ]" : "[FAIL]",
                name,
                detail.c_str());
    if (!ok) ++g_failed;
}

std::vector<float> makeTone(double freq, int frames, float amplitude)
{