172 lines
3.6 KiB
C
172 lines
3.6 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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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. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Digital Milliwatt Test
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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static char *tdesc = "Digital Milliwatt (mu-law) Test Application";
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static char *app = "Milliwatt";
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static char *synopsis = "Generate a Constant 1000Hz tone at 0dbm (mu-law)";
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static char *descrip =
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"Milliwatt(): Generate a Constant 1000Hz tone at 0dbm (mu-law)\n";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static char digital_milliwatt[] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e} ;
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static void *milliwatt_alloc(struct ast_channel *chan, void *params)
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{
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int *indexp;
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indexp = malloc(sizeof(int));
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if (indexp == NULL) return(NULL);
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*indexp = 0;
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return(indexp);
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}
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static void milliwatt_release(struct ast_channel *chan, void *data)
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{
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free(data);
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return;
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}
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static int milliwatt_generate(struct ast_channel *chan, void *data, int len, int samples)
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{
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struct ast_frame wf;
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unsigned char waste[AST_FRIENDLY_OFFSET];
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unsigned char buf[640];
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int i,*indexp = (int *) data;
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if (len > sizeof(buf))
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{
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ast_log(LOG_WARNING,"Only doing %d bytes (%d bytes requested)\n",(int)sizeof(buf),len);
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len = sizeof(buf);
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}
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waste[0] = 0; /* make compiler happy */
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wf.frametype = AST_FRAME_VOICE;
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wf.subclass = AST_FORMAT_ULAW;
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wf.offset = AST_FRIENDLY_OFFSET;
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wf.mallocd = 0;
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wf.data = buf;
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wf.datalen = len;
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wf.samples = wf.datalen;
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wf.src = "app_milliwatt";
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wf.delivery.tv_sec = 0;
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wf.delivery.tv_usec = 0;
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/* create a buffer containing the digital milliwatt pattern */
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for(i = 0; i < len; i++)
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{
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buf[i] = digital_milliwatt[(*indexp)++];
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*indexp &= 7;
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}
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if (ast_write(chan,&wf) < 0)
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{
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ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",chan->name,strerror(errno));
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return -1;
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}
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return 0;
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}
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static struct ast_generator milliwattgen =
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{
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alloc: milliwatt_alloc,
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release: milliwatt_release,
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generate: milliwatt_generate,
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} ;
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static int milliwatt_exec(struct ast_channel *chan, void *data)
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{
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struct localuser *u;
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LOCAL_USER_ADD(u);
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ast_set_write_format(chan, AST_FORMAT_ULAW);
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ast_set_read_format(chan, AST_FORMAT_ULAW);
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if (chan->_state != AST_STATE_UP)
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{
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ast_answer(chan);
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}
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if (ast_activate_generator(chan,&milliwattgen,"milliwatt") < 0)
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{
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ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",chan->name);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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while(!ast_safe_sleep(chan, 10000));
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ast_deactivate_generator(chan);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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int unload_module(void)
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{
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int res;
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res = ast_unregister_application(app);
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STANDARD_HANGUP_LOCALUSERS;
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return res;
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}
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int load_module(void)
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{
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return ast_register_application(app, milliwatt_exec, synopsis, descrip);
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}
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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