Mon Mar 19 11:30:32 2012

Asterisk developer's documentation


app_milliwatt.c File Reference

Digital Milliwatt Test. More...

#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/indications.h"

Go to the source code of this file.

Functions

static void __reg_module (void)
static void __unreg_module (void)
static int load_module (void)
static void * milliwatt_alloc (struct ast_channel *chan, void *params)
static int milliwatt_exec (struct ast_channel *chan, const char *data)
static int milliwatt_generate (struct ast_channel *chan, void *data, int len, int samples)
static void milliwatt_release (struct ast_channel *chan, void *data)
static int old_milliwatt_exec (struct ast_channel *chan)
static int unload_module (void)

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Digital Milliwatt (mu-law) Test Application" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "88eaa8f5c1bd988bedd71113385e0886" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, }
static const char app [] = "Milliwatt"
static struct ast_module_infoast_module_info = &__mod_info
static const char digital_milliwatt [] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e}
static struct ast_generator milliwattgen


Detailed Description

Digital Milliwatt Test.

Author:
Mark Spencer <markster@digium.com>

Definition in file app_milliwatt.c.


Function Documentation

static void __reg_module ( void   )  [static]

Definition at line 175 of file app_milliwatt.c.

static void __unreg_module ( void   )  [static]

Definition at line 175 of file app_milliwatt.c.

static int load_module ( void   )  [static]

Definition at line 170 of file app_milliwatt.c.

References ast_register_application_xml, and milliwatt_exec().

00171 {
00172    return ast_register_application_xml(app, milliwatt_exec);
00173 }

static void* milliwatt_alloc ( struct ast_channel chan,
void *  params 
) [static]

Definition at line 67 of file app_milliwatt.c.

References ast_calloc.

00068 {
00069    return ast_calloc(1, sizeof(int));
00070 }

static int milliwatt_exec ( struct ast_channel chan,
const char *  data 
) [static]

Definition at line 147 of file app_milliwatt.c.

References ast_playtones_start(), ast_safe_sleep(), ast_strlen_zero(), and old_milliwatt_exec().

Referenced by load_module().

00148 {
00149    const char *options = data;
00150    int res = -1;
00151 
00152    if (!ast_strlen_zero(options) && strchr(options, 'o')) {
00153       return old_milliwatt_exec(chan);
00154    }
00155 
00156    res = ast_playtones_start(chan, 23255, "1004/1000", 0);
00157 
00158    while (!res) {
00159       res = ast_safe_sleep(chan, 10000);
00160    }
00161 
00162    return res;
00163 }

static int milliwatt_generate ( struct ast_channel chan,
void *  data,
int  len,
int  samples 
) [static]

Definition at line 78 of file app_milliwatt.c.

References ARRAY_LEN, AST_FORMAT_ULAW, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_write(), ast_frame::data, ast_frame::datalen, errno, ast_frame::frametype, LOG_WARNING, ast_channel::name, ast_frame::ptr, and ast_frame::samples.

00079 {
00080    unsigned char buf[AST_FRIENDLY_OFFSET + 640];
00081    const int maxsamples = ARRAY_LEN(buf);
00082    int i, *indexp = (int *) data;
00083    struct ast_frame wf = {
00084       .frametype = AST_FRAME_VOICE,
00085       .subclass.codec = AST_FORMAT_ULAW,
00086       .offset = AST_FRIENDLY_OFFSET,
00087       .src = __FUNCTION__,
00088    };
00089    wf.data.ptr = buf + AST_FRIENDLY_OFFSET;
00090 
00091    /* Instead of len, use samples, because channel.c generator_force
00092    * generate(chan, tmp, 0, 160) ignores len. In any case, len is
00093    * a multiple of samples, given by number of samples times bytes per
00094    * sample. In the case of ulaw, len = samples. for signed linear
00095    * len = 2 * samples */
00096    if (samples > maxsamples) {
00097       ast_log(LOG_WARNING, "Only doing %d samples (%d requested)\n", maxsamples, samples);
00098       samples = maxsamples;
00099    }
00100 
00101    len = samples * sizeof (buf[0]);
00102    wf.datalen = len;
00103    wf.samples = samples;
00104 
00105    /* create a buffer containing the digital milliwatt pattern */
00106    for (i = 0; i < len; i++) {
00107       buf[AST_FRIENDLY_OFFSET + i] = digital_milliwatt[(*indexp)++];
00108       *indexp &= 7;
00109    }
00110 
00111    if (ast_write(chan,&wf) < 0) {
00112       ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",chan->name,strerror(errno));
00113       return -1;
00114    }
00115 
00116    return 0;
00117 }

static void milliwatt_release ( struct ast_channel chan,
void *  data 
) [static]

Definition at line 72 of file app_milliwatt.c.

References ast_free.

00073 {
00074    ast_free(data);
00075    return;
00076 }

static int old_milliwatt_exec ( struct ast_channel chan  )  [static]

Definition at line 125 of file app_milliwatt.c.

References ast_channel::_state, ast_activate_generator(), ast_answer(), ast_deactivate_generator(), AST_FORMAT_ULAW, ast_log(), ast_safe_sleep(), ast_set_read_format(), ast_set_write_format(), AST_STATE_UP, LOG_WARNING, milliwattgen, and ast_channel::name.

Referenced by milliwatt_exec().

00126 {
00127    ast_set_write_format(chan, AST_FORMAT_ULAW);
00128    ast_set_read_format(chan, AST_FORMAT_ULAW);
00129 
00130    if (chan->_state != AST_STATE_UP) {
00131       ast_answer(chan);
00132    }
00133 
00134    if (ast_activate_generator(chan,&milliwattgen,"milliwatt") < 0) {
00135       ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",chan->name);
00136       return -1;
00137    }
00138 
00139    while (!ast_safe_sleep(chan, 10000))
00140       ;
00141 
00142    ast_deactivate_generator(chan);
00143 
00144    return -1;
00145 }

static int unload_module ( void   )  [static]

Definition at line 165 of file app_milliwatt.c.

References ast_unregister_application().

00166 {
00167    return ast_unregister_application(app);
00168 }


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Digital Milliwatt (mu-law) Test Application" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "88eaa8f5c1bd988bedd71113385e0886" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, } [static]

Definition at line 175 of file app_milliwatt.c.

const char app[] = "Milliwatt" [static]

Definition at line 63 of file app_milliwatt.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 175 of file app_milliwatt.c.

const char digital_milliwatt[] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e} [static]

Definition at line 65 of file app_milliwatt.c.

struct ast_generator milliwattgen [static]

Initial value:

 {
   alloc: milliwatt_alloc,
   release: milliwatt_release,
   generate: milliwatt_generate,
}

Definition at line 119 of file app_milliwatt.c.

Referenced by old_milliwatt_exec().


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