Asterisk - The Open Source Telephony Project GIT-master-0bf3178
app_controlplayback.c
Go to the documentation of this file.
1/*
2 * Asterisk -- An open source telephony toolkit.
3 *
4 * Copyright (C) 1999 - 2005, Digium, Inc.
5 *
6 * Mark Spencer <markster@digium.com>
7 *
8 * See http://www.asterisk.org for more information about
9 * the Asterisk project. Please do not directly contact
10 * any of the maintainers of this project for assistance;
11 * the project provides a web site, mailing lists and IRC
12 * channels for your use.
13 *
14 * This program is free software, distributed under the terms of
15 * the GNU General Public License Version 2. See the LICENSE file
16 * at the top of the source tree.
17 */
18
19/*! \file
20 *
21 * \brief Trivial application to control playback of a sound file
22 *
23 * \author Mark Spencer <markster@digium.com>
24 *
25 * \ingroup applications
26 */
27
28/*** MODULEINFO
29 <support_level>core</support_level>
30 ***/
31
32#include "asterisk.h"
33
34#include "asterisk/pbx.h"
35#include "asterisk/app.h"
36#include "asterisk/module.h"
37#include "asterisk/manager.h"
38#include "asterisk/utils.h"
39#include "asterisk/astobj2.h"
40
41/*** DOCUMENTATION
42 <application name="ControlPlayback" language="en_US">
43 <synopsis>
44 Play a file with fast forward and rewind.
45 </synopsis>
46 <syntax>
47 <parameter name="filename" required="true" />
48 <parameter name="skipms">
49 <para>This is number of milliseconds to skip when rewinding or
50 fast-forwarding.</para>
51 </parameter>
52 <parameter name="ff">
53 <para>Fast-forward when this DTMF digit is received. (defaults to <literal>#</literal>)</para>
54 </parameter>
55 <parameter name="rew">
56 <para>Rewind when this DTMF digit is received. (defaults to <literal>*</literal>)</para>
57 </parameter>
58 <parameter name="stop">
59 <para>Stop playback when this DTMF digit is received.</para>
60 </parameter>
61 <parameter name="pause">
62 <para>Pause playback when this DTMF digit is received.</para>
63 </parameter>
64 <parameter name="restart">
65 <para>Restart playback when this DTMF digit is received.</para>
66 </parameter>
67 <parameter name="options">
68 <optionlist>
69 <option name="o">
70 <argument name="time" required="true">
71 <para>Start at <replaceable>time</replaceable> ms from the
72 beginning of the file.</para>
73 </argument>
74 </option>
75 </optionlist>
76 </parameter>
77 </syntax>
78 <description>
79 <para>This application will play back the given <replaceable>filename</replaceable>.</para>
80 <para>It sets the following channel variables upon completion:</para>
81 <variablelist>
82 <variable name="CPLAYBACKSTATUS">
83 <para>Contains the status of the attempt as a text string</para>
84 <value name="SUCCESS" />
85 <value name="USERSTOPPED" />
86 <value name="REMOTESTOPPED" />
87 <value name="ERROR" />
88 </variable>
89 <variable name="CPLAYBACKOFFSET">
90 <para>Contains the offset in ms into the file where playback
91 was at when it stopped. <literal>-1</literal> is end of file.</para>
92 </variable>
93 <variable name="CPLAYBACKSTOPKEY">
94 <para>If the playback is stopped by the user this variable contains
95 the key that was pressed.</para>
96 </variable>
97 </variablelist>
98 </description>
99 </application>
100 <manager name="ControlPlayback" language="en_US">
101 <synopsis>
102 Control the playback of a file being played to a channel.
103 </synopsis>
104 <syntax>
105 <xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
106 <parameter name="Channel" required="true">
107 <para>The name of the channel that currently has a file being played back to it.</para>
108 </parameter>
109 <parameter name="Control" required="true">
110 <enumlist>
111 <enum name="stop">
112 <para>Stop the playback operation.</para>
113 </enum>
114 <enum name="forward">
115 <para>Move the current position in the media forward. The amount
116 of time that the stream moves forward is determined by the
117 <replaceable>skipms</replaceable> value passed to the application
118 that initiated the playback.</para>
119 <note>
120 <para>The default skipms value is <literal>3000</literal> ms.</para>
121 </note>
122 </enum>
123 <enum name="reverse">
124 <para>Move the current position in the media backward. The amount
125 of time that the stream moves backward is determined by the
126 <replaceable>skipms</replaceable> value passed to the application
127 that initiated the playback.</para>
128 <note>
129 <para>The default skipms value is <literal>3000</literal> ms.</para>
130 </note>
131 </enum>
132 <enum name="pause">
133 <para>Pause/unpause the playback operation, if supported.
134 If not supported, stop the playback.</para>
135 </enum>
136 <enum name="restart">
137 <para>Restart the playback operation, if supported.
138 If not supported, stop the playback.</para>
139 </enum>
140 </enumlist>
141 </parameter>
142 </syntax>
143 <description>
144 <para>Control the operation of a media file being played back to a channel.
145 Note that this AMI action does not initiate playback of media to channel, but
146 rather controls the operation of a media operation that was already initiated
147 on the channel.</para>
148 <note>
149 <para>The <literal>pause</literal> and <literal>restart</literal>
150 <replaceable>Control</replaceable> options will stop a playback
151 operation if that operation was not initiated from the
152 <replaceable>ControlPlayback</replaceable> application or the
153 <replaceable>control stream file</replaceable> AGI command.</para>
154 </note>
155 </description>
156 <see-also>
157 <ref type="application">Playback</ref>
158 <ref type="application">ControlPlayback</ref>
159 <ref type="agi">stream file</ref>
160 <ref type="agi">control stream file</ref>
161 </see-also>
162 </manager>
163 ***/
164static const char app[] = "ControlPlayback";
165
166enum {
167 OPT_OFFSET = (1 << 1),
168};
169
170enum {
172 /* must stay as the last entry ... */
174};
175
180
181static int is_on_phonepad(char key)
182{
183 return key == 35 || key == 42 || (key >= 48 && key <= 57);
184}
185
186static int is_argument(const char *haystack, int needle)
187{
188 if (ast_strlen_zero(haystack))
189 return 0;
190
191 if (strchr(haystack, needle))
192 return -1;
193
194 return 0;
195}
196
197static int controlplayback_exec(struct ast_channel *chan, const char *data)
198{
199 int res = 0;
200 int skipms = 0;
201 long offsetms = 0;
202 char offsetbuf[20];
203 char stopkeybuf[2];
204 char *tmp;
205 struct ast_flags opts = { 0, };
206 char *opt_args[OPT_ARG_ARRAY_LEN];
208 AST_APP_ARG(filename);
209 AST_APP_ARG(skip);
210 AST_APP_ARG(fwd);
211 AST_APP_ARG(rev);
213 AST_APP_ARG(pause);
214 AST_APP_ARG(restart);
216 );
217
218 if (ast_strlen_zero(data)) {
219 ast_log(LOG_WARNING, "ControlPlayback requires an argument (filename)\n");
220 return -1;
221 }
222
223 tmp = ast_strdupa(data);
225
226 if (args.argc < 1) {
227 ast_log(LOG_WARNING, "ControlPlayback requires an argument (filename)\n");
228 return -1;
229 }
230
231 skipms = args.skip ? (atoi(args.skip) ? atoi(args.skip) : 3000) : 3000;
232
233 if (!args.fwd || !is_on_phonepad(*args.fwd)) {
234 char *digit = "#";
235 if (!is_argument(args.rev, *digit) && !is_argument(args.stop, *digit) && !is_argument(args.pause, *digit) && !is_argument(args.restart, *digit))
236 args.fwd = digit;
237 else
238 args.fwd = NULL;
239 }
240 if (!args.rev || !is_on_phonepad(*args.rev)) {
241 char *digit = "*";
242 if (!is_argument(args.fwd, *digit) && !is_argument(args.stop, *digit) && !is_argument(args.pause, *digit) && !is_argument(args.restart, *digit))
243 args.rev = digit;
244 else
245 args.rev = NULL;
246 }
247 ast_debug(1, "Forward key = %s, Rewind key = %s\n", args.fwd, args.rev);
248 if (args.stop && !is_on_phonepad(*args.stop))
249 args.stop = NULL;
250 if (args.pause && !is_on_phonepad(*args.pause))
251 args.pause = NULL;
252 if (args.restart && !is_on_phonepad(*args.restart))
253 args.restart = NULL;
254
255 if (args.options) {
256 ast_app_parse_options(cpb_opts, &opts, opt_args, args.options);
257 if (ast_test_flag(&opts, OPT_OFFSET))
258 offsetms = atol(opt_args[OPT_ARG_OFFSET]);
259 }
260
261 res = ast_control_streamfile(chan, args.filename, args.fwd, args.rev, args.stop, args.pause, args.restart, skipms, &offsetms);
262
263 /* If we stopped on one of our stop keys, return 0 */
264 if (res > 0 && args.stop && strchr(args.stop, res)) {
265 pbx_builtin_setvar_helper(chan, "CPLAYBACKSTATUS", "USERSTOPPED");
266 snprintf(stopkeybuf, sizeof(stopkeybuf), "%c", res);
267 pbx_builtin_setvar_helper(chan, "CPLAYBACKSTOPKEY", stopkeybuf);
268 res = 0;
269 } else if (res > 0 && res == AST_CONTROL_STREAM_STOP) {
270 pbx_builtin_setvar_helper(chan, "CPLAYBACKSTATUS", "REMOTESTOPPED");
271 res = 0;
272 } else {
273 if (res < 0) {
274 res = 0;
275 pbx_builtin_setvar_helper(chan, "CPLAYBACKSTATUS", "ERROR");
276 } else
277 pbx_builtin_setvar_helper(chan, "CPLAYBACKSTATUS", "SUCCESS");
278 }
279
280 snprintf(offsetbuf, sizeof(offsetbuf), "%ld", offsetms);
281 pbx_builtin_setvar_helper(chan, "CPLAYBACKOFFSET", offsetbuf);
282
283 return res;
284}
285
286static int controlplayback_manager(struct mansession *s, const struct message *m)
287{
288 const char *channel_name = astman_get_header(m, "Channel");
289 const char *control_type = astman_get_header(m, "Control");
290 struct ast_channel *chan;
291
292 if (ast_strlen_zero(channel_name)) {
293 astman_send_error(s, m, "Channel not specified");
294 return 0;
295 }
296
297 if (ast_strlen_zero(control_type)) {
298 astman_send_error(s, m, "Control not specified");
299 return 0;
300 }
301
302 chan = ast_channel_get_by_name(channel_name);
303 if (!chan) {
304 astman_send_error(s, m, "No such channel");
305 return 0;
306 }
307
308 if (!strcasecmp(control_type, "stop")) {
310 } else if (!strcasecmp(control_type, "forward")) {
312 } else if (!strcasecmp(control_type, "reverse")) {
314 } else if (!strcasecmp(control_type, "pause")) {
316 } else if (!strcasecmp(control_type, "restart")) {
318 } else {
319 astman_send_error(s, m, "Unknown control type");
320 chan = ast_channel_unref(chan);
321 return 0;
322 }
323
324 chan = ast_channel_unref(chan);
325 astman_send_ack(s, m, NULL);
326 return 0;
327}
328
329static int unload_module(void)
330{
331 int res = 0;
332
334 res |= ast_manager_unregister("ControlPlayback");
335
336 return res;
337}
338
339static int load_module(void)
340{
341 int res = 0;
342
345
346 return res;
347}
348
349AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Control Playback Application");
char digit
@ OPT_ARG_OFFSET
@ OPT_ARG_ARRAY_LEN
static const char app[]
static const struct ast_app_option cpb_opts[128]
static int is_on_phonepad(char key)
static int controlplayback_exec(struct ast_channel *chan, const char *data)
static int is_argument(const char *haystack, int needle)
static int controlplayback_manager(struct mansession *s, const struct message *m)
static int load_module(void)
@ OPT_OFFSET
static int unload_module(void)
unsigned int stop
Definition: app_sla.c:336
static int skipms
Asterisk main include file. File version handling, generic pbx functions.
#define ast_strdupa(s)
duplicate a string in memory from the stack
Definition: astmm.h:298
#define ast_log
Definition: astobj2.c:42
static int tmp()
Definition: bt_open.c:389
int ast_queue_control(struct ast_channel *chan, enum ast_control_frame_type control)
Queue a control frame without payload.
Definition: channel.c:1250
#define ast_channel_unref(c)
Decrease channel reference count.
Definition: channel.h:3004
struct ast_channel * ast_channel_get_by_name(const char *name)
Find a channel by name.
Definition: channel.c:1473
void astman_send_error(struct mansession *s, const struct message *m, char *error)
Send error in manager transaction.
Definition: manager.c:1969
void astman_send_ack(struct mansession *s, const struct message *m, char *msg)
Send ack in manager transaction.
Definition: manager.c:2001
const char * astman_get_header(const struct message *m, char *var)
Get header from manager transaction.
Definition: manager.c:1630
int ast_manager_unregister(const char *action)
Unregister a registered manager command.
Definition: manager.c:7608
Application convenience functions, designed to give consistent look and feel to Asterisk apps.
#define AST_APP_ARG(name)
Define an application argument.
#define END_OPTIONS
int ast_control_streamfile(struct ast_channel *chan, const char *file, const char *fwd, const char *rev, const char *stop, const char *pause, const char *restart, int skipms, long *offsetms)
Stream a file with fast forward, pause, reverse, restart.
Definition: main/app.c:1465
#define AST_APP_OPTIONS(holder, options...)
Declares an array of options for an application.
#define AST_APP_OPTION_ARG(option, flagno, argno)
Declares an application option that accepts an argument.
#define AST_DECLARE_APP_ARGS(name, arglist)
Declare a structure to hold an application's arguments.
#define BEGIN_OPTIONS
#define AST_STANDARD_APP_ARGS(args, parse)
Performs the 'standard' argument separation process for an application.
int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr)
Parses a string containing application options and sets flags/arguments.
Definition: main/app.c:3066
@ AST_CONTROL_STREAM_RESTART
@ AST_CONTROL_STREAM_SUSPEND
@ AST_CONTROL_STREAM_REVERSE
@ AST_CONTROL_STREAM_STOP
@ AST_CONTROL_STREAM_FORWARD
#define ast_debug(level,...)
Log a DEBUG message.
#define LOG_WARNING
The AMI - Asterisk Manager Interface - is a TCP protocol created to manage Asterisk with third-party ...
#define ast_manager_register_xml(action, authority, func)
Register a manager callback using XML documentation to describe the manager.
Definition: manager.h:191
#define EVENT_FLAG_CALL
Definition: manager.h:76
Asterisk module definitions.
#define AST_MODULE_INFO_STANDARD(keystr, desc)
Definition: module.h:581
#define ASTERISK_GPL_KEY
The text the key() function should return.
Definition: module.h:46
int ast_unregister_application(const char *app)
Unregister an application.
Definition: pbx_app.c:392
#define ast_register_application_xml(app, execute)
Register an application using XML documentation.
Definition: module.h:640
Core PBX routines and definitions.
int pbx_builtin_setvar_helper(struct ast_channel *chan, const char *name, const char *value)
Add a variable to the channel variable stack, removing the most recently set value for the same name.
#define NULL
Definition: resample.c:96
static force_inline int attribute_pure ast_strlen_zero(const char *s)
Definition: strings.h:65
Main Channel structure associated with a channel.
Structure used to handle boolean flags.
Definition: utils.h:199
In case you didn't read that giant block of text above the mansession_session struct,...
Definition: manager.c:326
const char * args
static struct test_options options
Utility functions.
#define ast_test_flag(p, flag)
Definition: utils.h:63