diff options
Diffstat (limited to '1.4.23-rc4/apps/app_milliwatt.c')
| -rw-r--r-- | 1.4.23-rc4/apps/app_milliwatt.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/1.4.23-rc4/apps/app_milliwatt.c b/1.4.23-rc4/apps/app_milliwatt.c new file mode 100644 index 000000000..b63771c38 --- /dev/null +++ b/1.4.23-rc4/apps/app_milliwatt.c @@ -0,0 +1,194 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2005, Digium, Inc. + * + * Mark Spencer <markster@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief Digital Milliwatt Test + * + * \author Mark Spencer <markster@digium.com> + * + * \ingroup applications + */ + +/*** MODULEINFO + <depend>res_indications</depend> + ***/ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> + +#include "asterisk/lock.h" +#include "asterisk/file.h" +#include "asterisk/logger.h" +#include "asterisk/channel.h" +#include "asterisk/pbx.h" +#include "asterisk/module.h" +#include "asterisk/utils.h" + +static char *app = "Milliwatt"; + +static char *synopsis = "Generate a Constant 1004Hz tone at 0dbm (mu-law)"; + +static char *descrip = +" Milliwatt([options]): Generate a Constant 1004Hz tone at 0dbm.\n" +"Previous versions of this application generated the tone at 1000Hz. If for\n" +"some reason you would prefer that behavior, supply the 'o' option to get the\n" +"old behavior.\n" +""; + + +static char digital_milliwatt[] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e} ; + +static void *milliwatt_alloc(struct ast_channel *chan, void *params) +{ + return ast_calloc(1, sizeof(int)); +} + +static void milliwatt_release(struct ast_channel *chan, void *data) +{ + free(data); + return; +} + +static int milliwatt_generate(struct ast_channel *chan, void *data, int len, int samples) +{ + unsigned char buf[AST_FRIENDLY_OFFSET + 640]; + const int maxsamples = sizeof (buf) / sizeof (buf[0]); + int i, *indexp = (int *) data; + struct ast_frame wf = { + .frametype = AST_FRAME_VOICE, + .subclass = AST_FORMAT_ULAW, + .offset = AST_FRIENDLY_OFFSET, + .data = buf + AST_FRIENDLY_OFFSET, + .src = __FUNCTION__, + }; + + /* Instead of len, use samples, because channel.c generator_force + * generate(chan, tmp, 0, 160) ignores len. In any case, len is + * a multiple of samples, given by number of samples times bytes per + * sample. In the case of ulaw, len = samples. for signed linear + * len = 2 * samples */ + + if (samples > maxsamples) { + ast_log(LOG_WARNING, "Only doing %d samples (%d requested)\n", maxsamples, samples); + samples = maxsamples; + } + + len = samples * sizeof (buf[0]); + wf.datalen = len; + wf.samples = samples; + + /* create a buffer containing the digital milliwatt pattern */ + for (i = 0; i < len; i++) { + buf[AST_FRIENDLY_OFFSET + i] = digital_milliwatt[(*indexp)++]; + *indexp &= 7; + } + + if (ast_write(chan,&wf) < 0) { + ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",chan->name,strerror(errno)); + return -1; + } + + return 0; +} + +static struct ast_generator milliwattgen = { + alloc: milliwatt_alloc, + release: milliwatt_release, + generate: milliwatt_generate, +}; + +static int old_milliwatt_exec(struct ast_channel *chan) +{ + ast_set_write_format(chan, AST_FORMAT_ULAW); + ast_set_read_format(chan, AST_FORMAT_ULAW); + + if (chan->_state != AST_STATE_UP) { + ast_answer(chan); + } + + if (ast_activate_generator(chan,&milliwattgen,"milliwatt") < 0) { + ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",chan->name); + return -1; + } + + while (!ast_safe_sleep(chan, 10000)) + ; + + ast_deactivate_generator(chan); + + return -1; +} + +static int milliwatt_exec(struct ast_channel *chan, void *data) +{ + const char *options = data; + struct ast_app *playtones_app; + struct ast_module_user *u; + int res = -1; + + u = ast_module_user_add(chan); + + if (!ast_strlen_zero(options) && strchr(options, 'o')) { + res = old_milliwatt_exec(chan); + goto exit_app; + } + + if (!(playtones_app = pbx_findapp("Playtones"))) { + ast_log(LOG_ERROR, "The Playtones application is required to run Milliwatt()\n"); + goto exit_app; + } + + res = pbx_exec(chan, playtones_app, "1004/1000"); + + while (!res) { + res = ast_safe_sleep(chan, 10000); + } + + res = 0; + +exit_app: + ast_module_user_remove(u); + + return res; +} + +static int unload_module(void) +{ + int res; + + res = ast_unregister_application(app); + + ast_module_user_hangup_all(); + + return res; +} + +static int load_module(void) +{ + return ast_register_application(app, milliwatt_exec, synopsis, descrip); +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Digital Milliwatt (mu-law) Test Application"); |