isdn/mISDN/dsp_cmx.c

14  * There is a chain of struct dsp_conf which has one or more members in a chain
34  * Two members will also exchange their data so they are crossconnected.
35  * Three or more members will be added in a conference and will hear each
39  *  - Crossconnecting or even conference, if more than two members are together.
40  *  - Force mixing of transmit data with other crossconnect/conference members.
135  * by using conference even with two members
492 	/* conf gets updated (all members) */
498 		printk(KERN_ERR "%s: conference without members\n",
505 	/* check all members in our conference */
636 		/* determine if members are on the same hfc chip */
639 		/* if there are members already in a conference */
668 	 * ok, now we are sure that all members are on the same pcm.
669 	 * now we will see if we have only two members, so we can do
673 	/* if we have only two members */
702 		/* if members have two banks (and not on the same chip) */
707 			/* if both members have same slots with crossed banks */
722 				/* all members have same slot */
785 				       "both members have not same slots\n",
799 			/* if members have one bank (or on the same chip) */
801 			/* if both members have different crossed slots */
816 				/* all members have same slot */
894 				       "PCM, because both members have not "
914 	 * unit available on the chip. also all members must be on the same
922 			       "members are on different chips or not "
928 	/* for more than two members.. */
930 	/* if all members already have the same conference */
938 	 * if there is an existing conference, but not all members have joined
1042 	/* join all members */
1087 			/* update members left on conf */
1141 	/* update members on conf */
1298 dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
1331 	       "SEND members=%d dsp=%s, conf=%p, rx_R=%05x rx_W=%05x\n",
1332 	       members, dsp->name, conf, dsp->rx_R, dsp->rx_W);
1408 	if (!conf || members <= 1) {
1442 	/* PROCESS DATA (two members) */
1446 	if (members == 2) {
1503 	/* PROCESS DATA (three or more members) */
1622 	int mustmix, members;
1656 	/* loop all members that do not require conference mixing */
1662 		members = 0;
1664 			members = list_count_nodes(&conf->mlist);
1666 			if (conf->software && members > 1)
1668 			if (conf->software && members > 2)
1675 			dsp_cmx_send_member(dsp, length, mixbuffer, members);
1684 	/* loop all members that require conference mixing */
1686 		/* count members and check hardware */
1687 		members = list_count_nodes(&conf->mlist);
1689 		if (conf->software && members > 1) {
1691 		if (conf->software && members > 2) {
1718 						    mixbuffer, members);
1902  * hdlc data is received from card and sent to all members.