added inband dtmf support to chan_lcr

Use option 's' in lcr_config or within the dial-command options,
just like in misdn.

diff --git a/chan_lcr.c b/chan_lcr.c
index b00bc7e..1f25d72 100644 (file)
--- a/chan_lcr.c
+++ b/chan_lcr.c
@@ -461,7 +461,6 @@ void apply_opt(struct chan_call *call, char *data)
                        CDEBUG(call, call->ast, "Option 'r' (re-buffer 160 bytes)");
                        call->rebuffer = 1;
                        break;
-#if 0
                case 's':
                        if (opt[1] != '\0') {
                                CERROR(call, call->ast, "Option 's' (inband DTMF) expects no parameter.\n", opt);
@@ -469,9 +468,7 @@ void apply_opt(struct chan_call *call, char *data)
                        }
                        CDEBUG(call, call->ast, "Option 's' (inband DTMF).\n");
                        call->inband_dtmf = 1;
-todo
                        break;
-#endif
                case 'v':
                        if (opt[1] != 'r' && opt[1] != 't') {
                                CERROR(call, call->ast, "Option 'v' (volume) expects parameter.\n", opt);
@@ -1755,6 +1752,42 @@ static int lcr_call(struct ast_channel *ast, char *dest, int timeout)
        return 0; 
 }
 
+static void send_digit_to_chan(struct ast_channel * ast, char digit )
+{
+        static const char* dtmf_tones[] = {
+                "!941+1336/100,!0/100", /* 0 */
+                "!697+1209/100,!0/100", /* 1 */
+                "!697+1336/100,!0/100", /* 2 */
+                "!697+1477/100,!0/100", /* 3 */
+                "!770+1209/100,!0/100", /* 4 */
+                "!770+1336/100,!0/100", /* 5 */
+                "!770+1477/100,!0/100", /* 6 */
+                "!852+1209/100,!0/100", /* 7 */
+                "!852+1336/100,!0/100", /* 8 */
+                "!852+1477/100,!0/100", /* 9 */
+                "!697+1633/100,!0/100", /* A */
+                "!770+1633/100,!0/100", /* B */
+                "!852+1633/100,!0/100", /* C */
+                "!941+1633/100,!0/100", /* D */
+                "!941+1209/100,!0/100", /* * */
+                "!941+1477/100,!0/100" };       /* # */
+
+        if (digit >= '0' && digit <='9')
+                ast_playtones_start(ast,0,dtmf_tones[digit-'0'], 0);
+        else if (digit >= 'A' && digit <= 'D')
+                ast_playtones_start(ast,0,dtmf_tones[digit-'A'+10], 0);
+        else if (digit == '*')
+                ast_playtones_start(ast,0,dtmf_tones[14], 0);
+        else if (digit == '#')
+                ast_playtones_start(ast,0,dtmf_tones[15], 0);
+        else {
+                /* not handled */
+                ast_log(LOG_DEBUG, "Unable to handle DTMF tone "
+                       "'%c' for '%s'\n", digit, ast->name);
+        }
+}
+
+
 static int lcr_digit_begin(struct ast_channel *ast, char digit)
 {
         struct chan_call *call;
@@ -1798,7 +1831,34 @@ static int lcr_digit_begin(struct ast_channel *ast, char digit)
 
 static int lcr_digit_end(struct ast_channel *ast, char digit, unsigned int duration)
 {
-       printf("DIGIT END %c\n", digit);
+       int inband_dtmf = 0;
+        struct chan_call *call;
+
+       ast_mutex_lock(&chan_lock);
+
+        call = ast->tech_pvt;
+
+       if (!call) {
+               CERROR(NULL, ast, 
+                      "Received digit from Asterisk, "
+                      "but no call instance exists.\n");
+               ast_mutex_unlock(&chan_lock);
+               return -1;
+       }
+
+       CDEBUG(call, ast, "DIGIT END '%c' from Asterisk.\n", digit);
+
+       if (call->state == CHAN_LCR_STATE_CONNECT && call->inband_dtmf) {
+               inband_dtmf = 1;
+       }
+
+       ast_mutex_unlock(&chan_lock);
+
+       if (inband_dtmf) {
+               CDEBUG(call, ast, "-> sending '%c' inband.\n", digit);
+               send_digit_to_chan(ast, digit);
+       }
+
        return (0);
 }
 
@@ -2469,7 +2529,7 @@ int load_module(void)
                                 "    c - Make crypted outgoing call, optarg is keyindex.\n"
                                 "    e - Perform echo cancelation on this channel.\n"
                                 "        Takes mISDN pipeline option as optarg.\n"
-//                              "    s - Send Non Inband DTMF as inband.\n"
+                                "    s - Send Non Inband DTMF as inband.\n"
                                 "   vr - rxgain control\n"
                                 "   vt - txgain control\n"
                                 "        Volume changes at factor 2 ^ optarg.\n"

diff --git a/chan_lcr.h b/chan_lcr.h
index 1ef853d..a55c87c 100644 (file)
--- a/chan_lcr.h
+++ b/chan_lcr.h
@@ -54,6 +54,8 @@ struct chan_call {
                                        /* shall dtmf be enabled */
        int                     no_dtmf;
                                        /* dtmf disabled by option */
+       int                     inband_dtmf; /* generate dtmf tones, if
+                                             requested by asterisk */
         int                     rebuffer; /* send only 160 bytes frames
                                             to asterisk */
         int                     on_hold; /* track hold management, since