The Milliwatt application uses incorrect tone timings that cause it to play the 1004 Hz tone constantly. This adds an option to enable the correct timing behavior, so that the Milliwatt application can be used for milliwatt test lines. The default behavior remains unchanged for compatability reasons, even though it is incorrect. ASTERISK-29575 #close Change-Id: I73ccc6c6fcaa31931c6fff3b85ad1805b2ce9d8c
192 lines
5.1 KiB
C
192 lines
5.1 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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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/indications.h"
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#include "asterisk/format_cache.h"
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/*** DOCUMENTATION
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<application name="Milliwatt" language="en_US">
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<synopsis>
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Generates a 1004 Hz test tone at 0dbm (mu-law).
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</synopsis>
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<syntax>
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<parameter name="options">
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<optionlist>
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<option name="m">
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<para>Generate a 1004 Hz Milliwatt test tone at 0dbm, with a
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1 second silent interval. This option must be specified
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if you are using this for a milliwatt test line.</para>
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</option>
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<option name="o">
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<para>Generate a constant tone at 1000 Hz like previous version.</para>
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</option>
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</optionlist>
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</parameter>
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</syntax>
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<description>
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<para>Generates a 1004 Hz test tone.</para>
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<para>By default, this application does not provide a Milliwatt test tone. It simply
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plays a 1004 Hz tone, which is not suitable for performing a milliwatt test.
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The <literal>m</literal> option should be used so that a real Milliwatt test tone
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is provided. This will include a 1 second silent interval every 10 seconds.</para>
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<para>Previous versions of this application generated a constant tone at 1000 Hz. If for
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some reason you would prefer that behavior, supply the <literal>o</literal> option to get the
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old behavior.</para>
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</description>
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</application>
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***/
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static const char app[] = "Milliwatt";
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static const 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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ast_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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unsigned char buf[AST_FRIENDLY_OFFSET + 640];
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const int maxsamples = ARRAY_LEN(buf) - (AST_FRIENDLY_OFFSET / sizeof(buf[0]));
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int i, *indexp = (int *) data, res;
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struct ast_frame wf = {
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.frametype = AST_FRAME_VOICE,
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.offset = AST_FRIENDLY_OFFSET,
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.src = __FUNCTION__,
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};
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wf.subclass.format = ast_format_ulaw;
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wf.data.ptr = buf + AST_FRIENDLY_OFFSET;
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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.datalen = len;
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wf.samples = samples;
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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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buf[AST_FRIENDLY_OFFSET + i] = digital_milliwatt[(*indexp)++];
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*indexp &= 7;
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}
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res = ast_write(chan, &wf);
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ast_frfree(&wf);
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if (res < 0) {
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ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",ast_channel_name(chan),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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.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 old_milliwatt_exec(struct ast_channel *chan)
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{
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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 (ast_channel_state(chan) != AST_STATE_UP) {
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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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ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",ast_channel_name(chan));
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return -1;
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}
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while (!ast_safe_sleep(chan, 10000))
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;
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ast_deactivate_generator(chan);
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return -1;
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}
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static int milliwatt_exec(struct ast_channel *chan, const char *data)
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{
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const char *options = data;
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int res = -1;
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if (!ast_strlen_zero(options) && strchr(options, 'o')) {
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return old_milliwatt_exec(chan);
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}
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if (!ast_strlen_zero(options) && strchr(options, 'm')) {
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res = ast_playtones_start(chan, 23255, "1004/9000,0/1000", 0);
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} else {
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res = ast_playtones_start(chan, 23255, "1004/1000", 0);
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}
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while (!res) {
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res = ast_safe_sleep(chan, 10000);
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}
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application_xml(app, milliwatt_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Digital Milliwatt (mu-law) Test Application");
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