379 static void init_sine(sine_t *sine)  in init_sine()  argument
381   sine->phase = 0;  in init_sine()
382   sine->max_phase = 1.0 / freq;  in init_sine()
383   sine->step = 1.0 / (double)rate;  in init_sine()
388   sine_t *sine = arg;  in generate_sine()  local
391   res.f = sin((sine->phase * 2 * M_PI) / sine->max_phase - M_PI);  in generate_sine()
395   sine->phase += sine->step;  in generate_sine()
396   if (sine->phase >= sine->max_phase)  in generate_sine()
397     sine->phase -= sine->max_phase;  in generate_sine()
852 static sine_t sine;  variable
862     init_sine(&sine);  in init_loop()
901       do_generate(frames, channel, period_size, generate_sine, &sine);  in write_loop()