bf3fe05dfb
This needs some more testing before it's on by default. If the card is otherwise functioning, these messages may be confusing to the user. If the card is not functioning, the driver can be reloaded with debug to check for this condition. Signed-off-by: Shaun Ruffell <sruffell@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9205 a0bf4364-ded3-4de4-8d8a-66a801d63aff
146 lines
3.6 KiB
C
146 lines
3.6 KiB
C
/*
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* ECHO_CAN_JPAH
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*
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* by Jason Parker
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*
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* Based upon mg2ec.h - sort of.
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* This "echo can" will completely hose your audio.
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* Don't use it unless you're absolutely sure you know what you're doing.
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*
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* Copyright (C) 2007-2008, Digium, Inc.
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*
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* All rights reserved.
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*
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*/
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/*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2 as published by the
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* Free Software Foundation. See the LICENSE file included with
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* this program for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/ctype.h>
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#include <linux/moduleparam.h>
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#include <dahdi/kernel.h>
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static int debug;
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#define module_printk(level, fmt, args...) printk(level "%s: " fmt, THIS_MODULE->name, ## args)
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#define debug_printk(level, fmt, args...) if (debug >= level) printk("%s (%s): " fmt, THIS_MODULE->name, __FUNCTION__, ## args)
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static int echo_can_create(struct dahdi_chan *chan, struct dahdi_echocanparams *ecp,
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struct dahdi_echocanparam *p, struct dahdi_echocan_state **ec);
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static void echo_can_free(struct dahdi_chan *chan, struct dahdi_echocan_state *ec);
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static void echo_can_process(struct dahdi_echocan_state *ec, short *isig, const short *iref, u32 size);
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static int echo_can_traintap(struct dahdi_echocan_state *ec, int pos, short val);
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static const struct dahdi_echocan_factory my_factory = {
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.name = "JPAH",
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.owner = THIS_MODULE,
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.echocan_create = echo_can_create,
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};
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static const struct dahdi_echocan_ops my_ops = {
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.name = "JPAH",
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.echocan_free = echo_can_free,
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.echocan_process = echo_can_process,
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.echocan_traintap = echo_can_traintap,
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};
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struct ec_pvt {
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struct dahdi_echocan_state dahdi;
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int blah;
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};
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#define dahdi_to_pvt(a) container_of(a, struct ec_pvt, dahdi)
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static int echo_can_create(struct dahdi_chan *chan, struct dahdi_echocanparams *ecp,
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struct dahdi_echocanparam *p, struct dahdi_echocan_state **ec)
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{
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struct ec_pvt *pvt;
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if (ecp->param_count > 0) {
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printk(KERN_WARNING "JPAH does not support parameters; failing request\n");
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return -EINVAL;
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}
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pvt = kzalloc(sizeof(*pvt), GFP_KERNEL);
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if (!pvt)
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return -ENOMEM;
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pvt->dahdi.ops = &my_ops;
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*ec = &pvt->dahdi;
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return 0;
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}
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static void echo_can_free(struct dahdi_chan *chan, struct dahdi_echocan_state *ec)
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{
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struct ec_pvt *pvt = dahdi_to_pvt(ec);
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kfree(pvt);
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}
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static void echo_can_process(struct dahdi_echocan_state *ec, short *isig, const short *iref, u32 size)
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{
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struct ec_pvt *pvt = dahdi_to_pvt(ec);
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u32 x;
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for (x = 0; x < size; x++) {
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if (pvt->blah < 2) {
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pvt->blah++;
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*isig++ = 0;
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} else {
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pvt->blah = 0;
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isig++;
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}
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}
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}
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static int echo_can_traintap(struct dahdi_echocan_state *ec, int pos, short val)
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{
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return 0;
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}
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static int __init mod_init(void)
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{
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if (dahdi_register_echocan_factory(&my_factory)) {
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module_printk(KERN_ERR, "could not register with DAHDI core\n");
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return -EPERM;
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}
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module_printk(KERN_NOTICE, "Registered echo canceler '%s'\n", my_factory.name);
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return 0;
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}
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static void __exit mod_exit(void)
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{
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dahdi_unregister_echocan_factory(&my_factory);
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}
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module_param(debug, int, S_IRUGO | S_IWUSR);
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MODULE_DESCRIPTION("DAHDI Jason Parker Audio Hoser");
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MODULE_AUTHOR("Jason Parker <jparker@digium.com>");
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MODULE_LICENSE("GPL v2");
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module_init(mod_init);
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module_exit(mod_exit);
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