fd568fc3fe
ARRAY_SIZE is more concise to use when the size of an array is divided by the size of its type or the size of its first element. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @i@ @@ #include <linux/kernel.h> @depends on i using "paren.iso"@ type T; T[] E; @@ - (sizeof(E)/sizeof(T)) + ARRAY_SIZE(E) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
3 KiB
C
139 lines
3 KiB
C
/*
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* dsp_hwec.c:
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* builtin mISDN dsp pipeline element for enabling the hw echocanceller
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*
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* Copyright (C) 2007, Nadi Sarrar
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*
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* Nadi Sarrar <nadi@beronet.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mISDNdsp.h>
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#include <linux/mISDNif.h>
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#include "core.h"
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#include "dsp.h"
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#include "dsp_hwec.h"
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static struct mISDN_dsp_element_arg args[] = {
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{ "deftaps", "128", "Set the number of taps of cancellation." },
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};
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static struct mISDN_dsp_element dsp_hwec_p = {
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.name = "hwec",
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.new = NULL,
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.free = NULL,
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.process_tx = NULL,
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.process_rx = NULL,
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.num_args = ARRAY_SIZE(args),
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.args = args,
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};
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struct mISDN_dsp_element *dsp_hwec = &dsp_hwec_p;
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void dsp_hwec_enable(struct dsp *dsp, const char *arg)
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{
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int deftaps = 128,
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len;
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struct mISDN_ctrl_req cq;
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if (!dsp) {
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printk(KERN_ERR "%s: failed to enable hwec: dsp is NULL\n",
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__func__);
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return;
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}
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if (!arg)
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goto _do;
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len = strlen(arg);
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if (!len)
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goto _do;
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{
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char _dup[len + 1];
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char *dup, *tok, *name, *val;
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int tmp;
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strcpy(_dup, arg);
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dup = _dup;
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while ((tok = strsep(&dup, ","))) {
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if (!strlen(tok))
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continue;
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name = strsep(&tok, "=");
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val = tok;
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if (!val)
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continue;
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if (!strcmp(name, "deftaps")) {
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if (sscanf(val, "%d", &tmp) == 1)
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deftaps = tmp;
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}
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}
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}
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_do:
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printk(KERN_DEBUG "%s: enabling hwec with deftaps=%d\n",
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__func__, deftaps);
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memset(&cq, 0, sizeof(cq));
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cq.op = MISDN_CTRL_HFC_ECHOCAN_ON;
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cq.p1 = deftaps;
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if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
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printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
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__func__);
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return;
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}
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}
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void dsp_hwec_disable(struct dsp *dsp)
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{
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struct mISDN_ctrl_req cq;
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if (!dsp) {
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printk(KERN_ERR "%s: failed to disable hwec: dsp is NULL\n",
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__func__);
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return;
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}
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printk(KERN_DEBUG "%s: disabling hwec\n", __func__);
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memset(&cq, 0, sizeof(cq));
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cq.op = MISDN_CTRL_HFC_ECHOCAN_OFF;
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if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
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printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
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__func__);
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return;
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}
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}
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int dsp_hwec_init(void)
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{
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mISDN_dsp_element_register(dsp_hwec);
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return 0;
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}
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void dsp_hwec_exit(void)
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{
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mISDN_dsp_element_unregister(dsp_hwec);
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}
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