7a7d4000a0
Changed the echocan factory name to a function (get_name) called to get the name. This allows a factory to return a different name when being called in reference to a channel such as in the case of hardware echo cancellers. To further accommodate this change for HWEC, a new echocan_name function was added to the span ops struct and is used in hwec_factory in dahdi-base for all cards that support hardware echo cancellation. Signed-off-by: Kinsey Moore <kmoore@digium.com> Acked-by: Shaun Ruffell <sruffell@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9524 a0bf4364-ded3-4de4-8d8a-66a801d63aff
148 lines
3.7 KiB
C
148 lines
3.7 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 char *name = "JPAH";
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static const char *ec_name(const struct dahdi_chan *chan) { return name; }
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static const struct dahdi_echocan_factory my_factory = {
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.get_name = ec_name,
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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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.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",
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my_factory.get_name(NULL));
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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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