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DTMF events are now published on a channel's stasis_topic. AMI was

Browse Source 
refactored to use these events rather than producing the events directly
in channel.c. Finally, the code was added to app_stasis to produce
DTMF events on the WebSocket.

The AMI events are completely backward compatible, including sending
events on transmitted DTMF, and sending DTMF start events.

The Stasis-HTTP events are somewhat simplified. Since DTMF start and
DTMF send events are generally less useful, Stasis-HTTP will only send
events on received DTMF end.

(closes issue ASTERISK-21282)
(closes issue ASTERISK-21359)
Review: https://reviewboard.asterisk.org/r/2439


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@385734 65c4cc65-6c06-0410-ace0-fbb531ad65f3
changes/78/78/1
David M. Lee 12 years ago
parent c6cf12408e
commit 2450722f52
5 changed files with 206 additions and 46 deletions
Show Stats Download Patch File Download Diff File

40
apps/app_stasis.c
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@ -358,6 +358,43 @@ static int send_end_msg(struct app *app, struct ast_channel *chan)
return 0;
}
static void dtmf_handler(struct app *app, struct ast_channel_blob *obj)
{
RAII_VAR(struct ast_json *, extra, NULL, ast_json_unref);
RAII_VAR(struct ast_json *, msg, NULL, ast_json_unref);
const char *direction;
/* To simplify events, we'll only generate on receive */
direction = ast_json_string_get(
ast_json_object_get(obj->blob, "direction"));
if (strcmp("Received", direction) != 0) {
return;
}
extra = ast_json_pack(
"{s: o}",
"digit", ast_json_ref(ast_json_object_get(obj->blob, "digit")));
if (!extra) {
return;
}
msg = app_event_create("dtmf-received", obj->snapshot, extra);
if (!msg) {
return;
}
app_send(app, msg);
}
static void blob_handler(struct app *app, struct ast_channel_blob *blob)
{
/* To simplify events, we'll only generate on DTMF end */
if (strcmp(ast_channel_blob_json_type(blob), "dtmf_end") == 0) {
dtmf_handler(app, blob);
}
}
static void sub_handler(void *data, struct stasis_subscription *sub,
struct stasis_topic *topic,
struct stasis_message *message)
@ -373,6 +410,9 @@ static void sub_handler(void *data, struct stasis_subscription *sub,
return;
}
app_send(app, msg);
} else if (ast_channel_blob_type() == stasis_message_type(message)) {
struct ast_channel_blob *blob = stasis_message_data(message);
blob_handler(app, blob);
}
if (stasis_subscription_final_message(sub, message)) {
ao2_cleanup(data);

16
include/asterisk/cli.h
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@ -28,6 +28,7 @@ extern "C" {
#endif
#include "asterisk/linkedlists.h"
#include "asterisk/strings.h"
void ast_cli(int fd, const char *fmt, ...)
__attribute__((format(printf, 2, 3)));
@ -57,12 +58,17 @@ void ast_cli(int fd, const char *fmt, ...)
*/
#define ESS(x) ((x) == 1 ? "" : "s")
/*! \brief return Yes or No depending on the argument.
* This is used in many places in CLI command, having a function to generate
* this helps maintaining a consistent output (and possibly emitting the
* output in other languages, at some point).
/*!
* \brief Return Yes or No depending on the argument.
*
* Note that this should probably still be used for CLI commands instead of
* AST_YESNO(), in the off chance we someday want to translate the CLI.
*
* \param x Boolean value
* \return "Yes" if x is true (non-zero)
* \return "No" if x is false (zero)
*/
#define AST_CLI_YESNO(x) (x) ? "Yes" : "No"
#define AST_CLI_YESNO(x) AST_YESNO(x)
/*! \brief return On or Off depending on the argument.
* This is used in many places in CLI command, having a function to generate

12
include/asterisk/strings.h
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@ -82,6 +82,18 @@ static force_inline int attribute_pure ast_strlen_zero(const char *s)
*/
#define S_COR(a, b, c) ({typeof(&((b)[0])) __x = (b); (a) && !ast_strlen_zero(__x) ? (__x) : (c);})
/*!
* \brief return Yes or No depending on the argument.
*
* Note that this macro is used my AMI, where a literal "Yes" and "No" are
* expected, and translations would cause problems.
*
* \param x Boolean value
* \return "Yes" if x is true (non-zero)
* \return "No" if x is false (zero)
*/
#define AST_YESNO(x) ((x) ? "Yes" : "No")
/*!
\brief Gets a pointer to the first non-whitespace character in a string.
\param str the input string

92
main/channel.c
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@ -3714,42 +3714,56 @@ int ast_waitfordigit_full(struct ast_channel *c, int timeout_ms, int audiofd, in
return 0; /* Time is up */
}
static void send_dtmf_event(struct ast_channel *chan, const char *direction, const char digit, const char *begin, const char *end)
enum DtmfDirection {
DTMF_RECEIVED,
DTMF_SENT
};
static const char *dtmf_direction_to_string(enum DtmfDirection direction)
{
/*** DOCUMENTATION
<managerEventInstance>
<synopsis>Raised when a DTMF digit has started or ended on a channel.</synopsis>
<syntax>
<parameter name="Direction">
<enumlist>
<enum name="Received"/>
<enum name="Sent"/>
</enumlist>
</parameter>
<parameter name="Begin">
<enumlist>
<enum name="Yes"/>
<enum name="No"/>
</enumlist>
</parameter>
<parameter name="End">
<enumlist>
<enum name="Yes"/>
<enum name="No"/>
</enumlist>
</parameter>
</syntax>
</managerEventInstance>
***/
ast_manager_event(chan, EVENT_FLAG_DTMF,
"DTMF",
"Channel: %s\r\n"
"Uniqueid: %s\r\n"
"Digit: %c\r\n"
"Direction: %s\r\n"
"Begin: %s\r\n"
"End: %s\r\n",
ast_channel_name(chan), ast_channel_uniqueid(chan), digit, direction, begin, end);
switch (direction) {
case DTMF_RECEIVED:
return "Received";
case DTMF_SENT:
return "Sent";
}
return "?";
}
static void send_dtmf_begin_event(struct ast_channel *chan,
enum DtmfDirection direction, const char digit)
{
RAII_VAR(struct ast_json *, blob, NULL, ast_json_unref);
char digit_str[] = { digit, '\0' };
blob = ast_json_pack("{ s: s, s: s, s: s }",
"type", "dtmf_begin",
"digit", digit_str,
"direction", dtmf_direction_to_string(direction));
if (!blob) {
return;
}
publish_channel_blob(chan, blob);
}
static void send_dtmf_end_event(struct ast_channel *chan,
enum DtmfDirection direction, const char digit, long duration_ms)
{
RAII_VAR(struct ast_json *, blob, NULL, ast_json_unref);
char digit_str[] = { digit, '\0' };
blob = ast_json_pack("{ s: s, s: s, s: s, s: i }",
"type", "dtmf_end",
"digit", digit_str,
"direction", dtmf_direction_to_string(direction),
"duration_ms", duration_ms);
if (!blob) {
return;
}
publish_channel_blob(chan, blob);
}
static void ast_read_generator_actions(struct ast_channel *chan, struct ast_frame *f)
@ -4104,7 +4118,7 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
}
break;
case AST_FRAME_DTMF_END:
send_dtmf_event(chan, "Received", f->subclass.integer, "No", "Yes");
send_dtmf_end_event(chan, DTMF_RECEIVED, f->subclass.integer, f->len);
ast_log(LOG_DTMF, "DTMF end '%c' received on %s, duration %ld ms\n", f->subclass.integer, ast_channel_name(chan), f->len);
/* Queue it up if DTMF is deferred, or if DTMF emulation is forced. */
if (ast_test_flag(ast_channel_flags(chan), AST_FLAG_DEFER_DTMF) || ast_test_flag(ast_channel_flags(chan), AST_FLAG_EMULATE_DTMF)) {
@ -4190,7 +4204,7 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
}
break;
case AST_FRAME_DTMF_BEGIN:
send_dtmf_event(chan, "Received", f->subclass.integer, "Yes", "No");
send_dtmf_begin_event(chan, DTMF_RECEIVED, f->subclass.integer);
ast_log(LOG_DTMF, "DTMF begin '%c' received on %s\n", f->subclass.integer, ast_channel_name(chan));
if (ast_test_flag(ast_channel_flags(chan), AST_FLAG_DEFER_DTMF | AST_FLAG_END_DTMF_ONLY | AST_FLAG_EMULATE_DTMF) ||
(!ast_tvzero(*ast_channel_dtmf_tv(chan)) &&
@ -5042,7 +5056,7 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
if (old_frame != fr)
f = fr;
}
send_dtmf_event(chan, "Sent", fr->subclass.integer, "Yes", "No");
send_dtmf_begin_event(chan, DTMF_SENT, fr->subclass.integer);
ast_clear_flag(ast_channel_flags(chan), AST_FLAG_BLOCKING);
ast_channel_unlock(chan);
res = ast_senddigit_begin(chan, fr->subclass.integer);
@ -5058,7 +5072,7 @@ int ast_write(struct ast_channel *chan, struct ast_frame *fr)
ast_frfree(new_frame);
}
}
send_dtmf_event(chan, "Sent", fr->subclass.integer, "No", "Yes");
send_dtmf_end_event(chan, DTMF_SENT, fr->subclass.integer, fr->len);
ast_clear_flag(ast_channel_flags(chan), AST_FLAG_BLOCKING);
ast_channel_unlock(chan);
res = ast_senddigit_end(chan, fr->subclass.integer, fr->len);

92
main/manager_channels.c
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@ -275,8 +275,8 @@ struct ast_str *ast_manager_build_channel_state_string_suffix(
struct ast_var_t *var;
AST_LIST_TRAVERSE(snapshot->manager_vars, var, entries) {
ast_str_append(&out, 0, "ChanVariable%s: %s=%s\r\n",
suffix,
var->name, var->value);
suffix,
var->name, var->value);
}
}
@ -657,6 +657,90 @@ static void channel_hangup_request(struct ast_channel_blob *obj)
ast_str_buffer(extra));
}
static void channel_dtmf_begin(struct ast_channel_blob *obj)
{
RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
const char *digit =
ast_json_string_get(ast_json_object_get(obj->blob, "digit"));
const char *direction =
ast_json_string_get(ast_json_object_get(obj->blob, "direction"));
channel_event_string = manager_build_channel_state_string(obj->snapshot);
if (!channel_event_string) {
return;
}
/*** DOCUMENTATION
<managerEventInstance>
<synopsis>Raised when a DTMF digit has started on a channel.</synopsis>
<syntax>
<xi:include xpointer="xpointer(/docs/managerEvent[@name='Newchannel']/managerEventInstance/syntax/parameter)" />
<parameter name="Digit">
<para>DTMF digit received or transmitted (0-9, A-E, # or *</para>
</parameter>
<parameter name="Direction">
<enumlist>
<enum name="Received"/>
<enum name="Sent"/>
</enumlist>
</parameter>
</syntax>
</managerEventInstance>
***/
manager_event(EVENT_FLAG_DTMF, "DTMFBegin",
"%s"
"Digit: %s\r\n"
"Direction: %s\r\n",
ast_str_buffer(channel_event_string),
digit, direction);
}
static void channel_dtmf_end(struct ast_channel_blob *obj)
{
RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
const char *digit =
ast_json_string_get(ast_json_object_get(obj->blob, "digit"));
const char *direction =
ast_json_string_get(ast_json_object_get(obj->blob, "direction"));
long duration_ms =
ast_json_integer_get(ast_json_object_get(obj->blob, "duration_ms"));
channel_event_string = manager_build_channel_state_string(obj->snapshot);
if (!channel_event_string) {
return;
}
/*** DOCUMENTATION
<managerEventInstance>
<synopsis>Raised when a DTMF digit has ended on a channel.</synopsis>
<syntax>
<xi:include xpointer="xpointer(/docs/managerEvent[@name='Newchannel']/managerEventInstance/syntax/parameter)" />
<parameter name="Digit">
<para>DTMF digit received or transmitted (0-9, A-E, # or *</para>
</parameter>
<parameter name="DurationMs">
<para>Duration (in milliseconds) DTMF was sent/received</para>
</parameter>
<parameter name="Direction">
<enumlist>
<enum name="Received"/>
<enum name="Sent"/>
</enumlist>
</parameter>
</syntax>
</managerEventInstance>
***/
manager_event(EVENT_FLAG_DTMF, "DTMFEnd",
"%s"
"Digit: %s\r\n"
"DurationMs: %ld\r\n"
"Direction: %s\r\n",
ast_str_buffer(channel_event_string),
digit, duration_ms, direction);
}
/*!
* \brief Callback processing messages on the channel topic.
*/
@ -672,6 +756,10 @@ static void channel_blob_cb(void *data, struct stasis_subscription *sub,
channel_userevent(obj);
} else if (strcmp("hangup_request", ast_channel_blob_json_type(obj)) == 0) {
channel_hangup_request(obj);
} else if (strcmp("dtmf_begin", ast_channel_blob_json_type(obj)) == 0) {
channel_dtmf_begin(obj);
} else if (strcmp("dtmf_end", ast_channel_blob_json_type(obj)) == 0) {
channel_dtmf_end(obj);
}
}

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