[Asterisk-code-review] ARI POST DTMF: Make not compete with channel's media thread. (asterisk[13])
Richard Mudgett
asteriskteam at digium.com
Tue Jun 19 15:04:04 CDT 2018
Richard Mudgett has uploaded this change for review. ( https://gerrit.asterisk.org/9210
Change subject: ARI POST DTMF: Make not compete with channel's media thread.
......................................................................
ARI POST DTMF: Make not compete with channel's media thread.
There can be one and only one thread handling a channel's media at a time.
Otherwise, we don't know which thread is going to handle the media frames.
ASTERISK-27625
Change-Id: I4d6a2fe7386ea447ee199003bf8ad681cb30454e
---
M include/asterisk/app.h
M main/app.c
M res/stasis/control.c
3 files changed, 115 insertions(+), 34 deletions(-)
git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/10/9210/1
diff --git a/include/asterisk/app.h b/include/asterisk/app.h
index 5b10b1c..0865121 100644
--- a/include/asterisk/app.h
+++ b/include/asterisk/app.h
@@ -923,24 +923,51 @@
void ast_unreplace_sigchld(void);
/*!
- \brief Send DTMF to a channel
-
- \param chan The channel that will receive the DTMF frames
- \param peer (optional) Peer channel that will be autoserviced while the
- primary channel is receiving DTMF
- \param digits This is a string of characters representing the DTMF digits
- to be sent to the channel. Valid characters are
- "0123456789*#abcdABCD". Note: You can pass arguments 'f' or
- 'F', if you want to Flash the channel (if supported by the
- channel), or 'w' to add a 500 millisecond pause to the DTMF
- sequence.
- \param between This is the number of milliseconds to wait in between each
- DTMF digit. If zero milliseconds is specified, then the
- default value of 100 will be used.
- \param duration This is the duration that each DTMF digit should have.
-*/
+ * \brief Send a string of DTMF digits to a channel
+ *
+ * \param chan The channel that will receive the DTMF frames
+ * \param peer (optional) Peer channel that will be autoserviced while the
+ * primary channel is receiving DTMF
+ * \param digits This is a string of characters representing the DTMF digits
+ * to be sent to the channel. Valid characters are
+ * "0123456789*#abcdABCD". Note: You can pass arguments 'f' or
+ * 'F', if you want to Flash the channel (if supported by the
+ * channel), or 'w' to add a 500 millisecond pause to the DTMF
+ * sequence.
+ * \param between This is the number of milliseconds to wait in between each
+ * DTMF digit. If zero milliseconds is specified, then the
+ * default value of 100 will be used.
+ * \param duration This is the duration that each DTMF digit should have.
+ *
+ * \pre This must only be called by the channel's media handler thread.
+ *
+ * \retval 0 on success.
+ * \retval -1 on failure or a channel hung up.
+ */
int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration);
+/*!
+ * \brief Send a string of DTMF digits to a channel from an external thread.
+ *
+ * \param chan The channel that will receive the DTMF frames
+ * \param digits This is a string of characters representing the DTMF digits
+ * to be sent to the channel. Valid characters are
+ * "0123456789*#abcdABCD". Note: You can pass arguments 'f' or
+ * 'F', if you want to Flash the channel (if supported by the
+ * channel), or 'w' to add a 500 millisecond pause to the DTMF
+ * sequence.
+ * \param between This is the number of milliseconds to wait in between each
+ * DTMF digit. If zero milliseconds is specified, then the
+ * default value of 100 will be used.
+ * \param duration This is the duration that each DTMF digit should have.
+ *
+ * \pre This must only be called by threads that are not the channel's
+ * media handler thread.
+ *
+ * \return Nothing
+ */
+void ast_dtmf_stream_external(struct ast_channel *chan, const char *digits, int between, unsigned int duration);
+
/*! \brief Stream a filename (or file descriptor) as a generator. */
int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride);
diff --git a/main/app.c b/main/app.c
index 331c827..e7aab10 100644
--- a/main/app.c
+++ b/main/app.c
@@ -875,25 +875,37 @@
}
#endif
-int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration)
+static int external_sleep(struct ast_channel *chan, int ms)
+{
+ usleep(ms * 1000);
+ return 0;
+}
+
+static int dtmf_stream(struct ast_channel *chan, const char *digits, int between, unsigned int duration, int is_external)
{
const char *ptr;
int res;
struct ast_silence_generator *silgen = NULL;
+ int (*my_sleep)(struct ast_channel *chan, int ms);
+ int (*my_senddigit)(struct ast_channel *chan, char digit, unsigned int duration);
+
+ if (is_external) {
+ my_sleep = external_sleep;
+ my_senddigit = ast_senddigit_external;
+ } else {
+ my_sleep = ast_safe_sleep;
+ my_senddigit = ast_senddigit;
+ }
if (!between) {
between = 100;
- }
-
- if (peer && ast_autoservice_start(peer)) {
- return -1;
}
/* Need a quiet time before sending digits. */
if (ast_opt_transmit_silence) {
silgen = ast_channel_start_silence_generator(chan);
}
- res = ast_safe_sleep(chan, 100);
+ res = my_sleep(chan, 100);
if (res) {
goto dtmf_stream_cleanup;
}
@@ -901,12 +913,14 @@
for (ptr = digits; *ptr; ptr++) {
if (*ptr == 'w') {
/* 'w' -- wait half a second */
- if ((res = ast_safe_sleep(chan, 500))) {
+ res = my_sleep(chan, 500);
+ if (res) {
break;
}
} else if (*ptr == 'W') {
/* 'W' -- wait a second */
- if ((res = ast_safe_sleep(chan, 1000))) {
+ res = my_sleep(chan, 1000);
+ if (res) {
break;
}
} else if (strchr("0123456789*#abcdfABCDF", *ptr)) {
@@ -915,10 +929,11 @@
ast_indicate(chan, AST_CONTROL_FLASH);
} else {
/* Character represents valid DTMF */
- ast_senddigit(chan, *ptr, duration);
+ my_senddigit(chan, *ptr, duration);
}
/* pause between digits */
- if ((res = ast_safe_sleep(chan, between))) {
+ res = my_sleep(chan, between);
+ if (res) {
break;
}
} else {
@@ -930,6 +945,18 @@
if (silgen) {
ast_channel_stop_silence_generator(chan, silgen);
}
+
+ return res;
+}
+
+int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration)
+{
+ int res;
+
+ if (peer && ast_autoservice_start(peer)) {
+ return -1;
+ }
+ res = dtmf_stream(chan, digits, between, duration, 0);
if (peer && ast_autoservice_stop(peer)) {
res = -1;
}
@@ -937,6 +964,11 @@
return res;
}
+void ast_dtmf_stream_external(struct ast_channel *chan, const char *digits, int between, unsigned int duration)
+{
+ dtmf_stream(chan, digits, between, duration, 1);
+}
+
struct linear_state {
int fd;
int autoclose;
diff --git a/res/stasis/control.c b/res/stasis/control.c
index df97931..1821f20 100644
--- a/res/stasis/control.c
+++ b/res/stasis/control.c
@@ -503,6 +503,32 @@
char dtmf[];
};
+static void dtmf_in_bridge(struct ast_channel *chan, struct stasis_app_control_dtmf_data *dtmf_data)
+{
+ if (dtmf_data->before) {
+ usleep(dtmf_data->before * 1000);
+ }
+
+ ast_dtmf_stream_external(chan, dtmf_data->dtmf, dtmf_data->between, dtmf_data->duration);
+
+ if (dtmf_data->after) {
+ usleep(dtmf_data->after * 1000);
+ }
+}
+
+static void dtmf_no_bridge(struct ast_channel *chan, struct stasis_app_control_dtmf_data *dtmf_data)
+{
+ if (dtmf_data->before) {
+ ast_safe_sleep(chan, dtmf_data->before);
+ }
+
+ ast_dtmf_stream(chan, NULL, dtmf_data->dtmf, dtmf_data->between, dtmf_data->duration);
+
+ if (dtmf_data->after) {
+ ast_safe_sleep(chan, dtmf_data->after);
+ }
+}
+
static int app_control_dtmf(struct stasis_app_control *control,
struct ast_channel *chan, void *data)
{
@@ -512,14 +538,10 @@
ast_indicate(chan, AST_CONTROL_PROGRESS);
}
- if (dtmf_data->before) {
- ast_safe_sleep(chan, dtmf_data->before);
- }
-
- ast_dtmf_stream(chan, NULL, dtmf_data->dtmf, dtmf_data->between, dtmf_data->duration);
-
- if (dtmf_data->after) {
- ast_safe_sleep(chan, dtmf_data->after);
+ if (stasis_app_get_bridge(control)) {
+ dtmf_in_bridge(chan, dtmf_data);
+ } else {
+ dtmf_no_bridge(chan, dtmf_data);
}
return 0;
--
To view, visit https://gerrit.asterisk.org/9210
To unsubscribe, visit https://gerrit.asterisk.org/settings
Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-MessageType: newchange
Gerrit-Change-Id: I4d6a2fe7386ea447ee199003bf8ad681cb30454e
Gerrit-Change-Number: 9210
Gerrit-PatchSet: 1
Gerrit-Owner: Richard Mudgett <rmudgett at digium.com>
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