![rizzo](/assets/img/avatar_default.png)
As partly documented in loader.c and include/asterisk/module.h, modules are now expected to return all of their methods and flags into a structure 'mod_data', and are normally loaded with RTLD_NOW | RTLD_LOCAL, so symbols are resolved immediately and conflicts should be less likely. Only in a small number of cases (res_*, typically) modules are loaded RTLD_GLOBAL, so they can export symbols. The core of the change is only the two files loader.c and include/asterisk/module.h, all the rest is simply adaptation of the existing modules to the new API, a rather mechanical (but believe me, time and finger-consuming!) process whose detail you can figure out by svn diff'ing any single module. Expect some minor compilation issue after this change, please report it on mantis http://bugs.digium.com/view.php?id=6968 so we collect all the feedback in one place. I am just sorry that this change missed SVN version number 20000! git-svn-id: http://svn.digium.com/svn/asterisk/trunk@20003 f38db490-d61c-443f-a65b-d21fe96a405b
168 lines
3.9 KiB
C
168 lines
3.9 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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* \author Mark Spencer <markster@digium.com>
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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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#include "asterisk/utils.h"
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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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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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return ast_calloc(1, sizeof(int));
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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 buf[AST_FRIENDLY_OFFSET + 640];
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const int maxsamples = sizeof (buf) / sizeof (buf[0]);
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int i, *indexp = (int *) data;
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/* Instead of len, use samples, because channel.c generator_force
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* generate(chan, tmp, 0, 160) ignores len. In any case, len is
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* a multiple of samples, given by number of samples times bytes per
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* sample. In the case of ulaw, len = samples. for signed linear
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* len = 2 * samples */
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if (samples > maxsamples) {
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ast_log(LOG_WARNING, "Only doing %d samples (%d requested)\n", maxsamples, samples);
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samples = maxsamples;
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}
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len = samples * sizeof (buf[0]);
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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 + AST_FRIENDLY_OFFSET;
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wf.datalen = len;
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wf.samples = samples;
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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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wf.prev = wf.next = NULL;
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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[AST_FRIENDLY_OFFSET + 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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static int unload_module(void *mod)
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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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static int load_module(void *mod)
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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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static const char *description(void)
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{
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return "Digital Milliwatt (mu-law) Test Application";
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}
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static const char *key(void)
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{
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return ASTERISK_GPL_KEY;
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}
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STD_MOD1;
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