#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "asterisk.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 dependency graph for app_milliwatt.c:
Go to the source code of this file.
Functions | |
char * | description (void) |
Provides a description of the module. | |
char * | key () |
Returns the ASTERISK_GPL_KEY. | |
int | load_module (void) |
Initialize the module. | |
static void * | milliwatt_alloc (struct ast_channel *chan, void *params) |
static int | milliwatt_exec (struct ast_channel *chan, void *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) |
int | unload_module (void) |
Cleanup all module structures, sockets, etc. | |
int | usecount (void) |
Provides a usecount. | |
Variables | |
static char * | app = "Milliwatt" |
static char * | descrip |
static char | digital_milliwatt [] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e} |
LOCAL_USER_DECL | |
static struct ast_generator | milliwattgen |
STANDARD_LOCAL_USER | |
static char * | synopsis = "Generate a Constant 1000Hz tone at 0dbm (mu-law)" |
static char * | tdesc = "Digital Milliwatt (mu-law) Test Application" |
Definition in file app_milliwatt.c.
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Provides a description of the module.
Definition at line 155 of file app_milliwatt.c. References tdesc. 00156 { 00157 return tdesc; 00158 }
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Returns the ASTERISK_GPL_KEY. This returns the ASTERISK_GPL_KEY, signifiying that you agree to the terms of the GPL stated in the ASTERISK_GPL_KEY. Your module will not load if it does not return the EXACT message:
char *key(void) { return ASTERISK_GPL_KEY; }
Definition at line 167 of file app_milliwatt.c. References ASTERISK_GPL_KEY. 00168 { 00169 return ASTERISK_GPL_KEY; 00170 }
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Initialize the module. Initialize the Agents module. This function is being called by Asterisk when loading the module. Among other thing it registers applications, cli commands and reads the cofiguration file.
Definition at line 150 of file app_milliwatt.c. References app, ast_register_application(), descrip, milliwatt_exec(), and synopsis. 00151 { 00152 return ast_register_application(app, milliwatt_exec, synopsis, descrip); 00153 }
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Definition at line 58 of file app_milliwatt.c. References malloc. 00059 { 00060 int *indexp; 00061 indexp = malloc(sizeof(int)); 00062 if (indexp == NULL) return(NULL); 00063 *indexp = 0; 00064 return(indexp); 00065 }
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Definition at line 116 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, LOCAL_USER_ADD, LOCAL_USER_REMOVE, LOG_WARNING, and ast_channel::name. Referenced by load_module(). 00117 { 00118 00119 struct localuser *u; 00120 LOCAL_USER_ADD(u); 00121 ast_set_write_format(chan, AST_FORMAT_ULAW); 00122 ast_set_read_format(chan, AST_FORMAT_ULAW); 00123 if (chan->_state != AST_STATE_UP) 00124 { 00125 ast_answer(chan); 00126 } 00127 if (ast_activate_generator(chan,&milliwattgen,"milliwatt") < 0) 00128 { 00129 ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",chan->name); 00130 LOCAL_USER_REMOVE(u); 00131 return -1; 00132 } 00133 while(!ast_safe_sleep(chan, 10000)); 00134 ast_deactivate_generator(chan); 00135 LOCAL_USER_REMOVE(u); 00136 return -1; 00137 }
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Definition at line 73 of file app_milliwatt.c. References AST_FORMAT_ULAW, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_write(), ast_frame::data, ast_frame::datalen, ast_frame::delivery, digital_milliwatt, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_channel::name, ast_frame::next, ast_frame::offset, ast_frame::prev, ast_frame::samples, ast_frame::src, and ast_frame::subclass. 00074 { 00075 struct ast_frame wf; 00076 unsigned char buf[AST_FRIENDLY_OFFSET + 640]; 00077 int i,*indexp = (int *) data; 00078 00079 if (len + AST_FRIENDLY_OFFSET > sizeof(buf)) 00080 { 00081 ast_log(LOG_WARNING,"Only doing %d bytes (%d bytes requested)\n",(int)(sizeof(buf) - AST_FRIENDLY_OFFSET),len); 00082 len = sizeof(buf) - AST_FRIENDLY_OFFSET; 00083 } 00084 wf.frametype = AST_FRAME_VOICE; 00085 wf.subclass = AST_FORMAT_ULAW; 00086 wf.offset = AST_FRIENDLY_OFFSET; 00087 wf.mallocd = 0; 00088 wf.data = buf + AST_FRIENDLY_OFFSET; 00089 wf.datalen = len; 00090 wf.samples = wf.datalen; 00091 wf.src = "app_milliwatt"; 00092 wf.delivery.tv_sec = 0; 00093 wf.delivery.tv_usec = 0; 00094 wf.prev = wf.next = NULL; 00095 /* create a buffer containing the digital milliwatt pattern */ 00096 for(i = 0; i < len; i++) 00097 { 00098 buf[AST_FRIENDLY_OFFSET + i] = digital_milliwatt[(*indexp)++]; 00099 *indexp &= 7; 00100 } 00101 if (ast_write(chan,&wf) < 0) 00102 { 00103 ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",chan->name,strerror(errno)); 00104 return -1; 00105 } 00106 return 0; 00107 }
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Definition at line 67 of file app_milliwatt.c. References free.
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Cleanup all module structures, sockets, etc. This is called at exit. Any registrations and memory allocations need to be unregistered and free'd here. Nothing else will do these for you (until exit).
Definition at line 139 of file app_milliwatt.c. References app, ast_unregister_application(), and STANDARD_HANGUP_LOCALUSERS. 00140 { 00141 int res; 00142 00143 res = ast_unregister_application(app); 00144 00145 STANDARD_HANGUP_LOCALUSERS; 00146 00147 return res; 00148 }
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Provides a usecount. This function will be called by various parts of asterisk. Basically, all it has to do is to return a usecount when called. You will need to maintain your usecount within the module somewhere. The usecount should be how many channels provided by this module are in use.
Definition at line 160 of file app_milliwatt.c. References STANDARD_USECOUNT. 00161 { 00162 int res; 00163 STANDARD_USECOUNT(res); 00164 return res; 00165 }
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Definition at line 45 of file app_milliwatt.c. |
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Initial value:
"Milliwatt(): Generate a Constant 1000Hz tone at 0dbm (mu-law)\n"
Definition at line 49 of file app_milliwatt.c. |
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Definition at line 56 of file app_milliwatt.c. Referenced by milliwatt_generate(). |
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Definition at line 54 of file app_milliwatt.c. |
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Definition at line 109 of file app_milliwatt.c. |
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Definition at line 52 of file app_milliwatt.c. |
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Definition at line 47 of file app_milliwatt.c. |
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Definition at line 43 of file app_milliwatt.c. |