void dsp_dtmf_hardware()

in mISDN/dsp_dtmf.c [50:94]
38 lines of code
11 McCabe index (conditional complexity)

void dsp_dtmf_hardware(struct dsp *dsp)
{
	int hardware = 1;

	if (!dsp->dtmf.enable)
		return;

	if (!dsp->features.hfc_dtmf)
		hardware = 0;

	/* check for volume change */
	if (dsp->tx_volume) {
		if (dsp_debug & DEBUG_DSP_DTMF)
			printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
			       "because tx_volume is changed\n",
			       __func__, dsp->name);
		hardware = 0;
	}
	if (dsp->rx_volume) {
		if (dsp_debug & DEBUG_DSP_DTMF)
			printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
			       "because rx_volume is changed\n",
			       __func__, dsp->name);
		hardware = 0;
	}
	/* check if encryption is enabled */
	if (dsp->bf_enable) {
		if (dsp_debug & DEBUG_DSP_DTMF)
			printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
			       "because encryption is enabled\n",
			       __func__, dsp->name);
		hardware = 0;
	}
	/* check if pipeline exists */
	if (dsp->pipeline.inuse) {
		if (dsp_debug & DEBUG_DSP_DTMF)
			printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
			       "because pipeline exists.\n",
			       __func__, dsp->name);
		hardware = 0;
	}

	dsp->dtmf.hardware = hardware;
	dsp->dtmf.software = !hardware;
}