From c50e962be0a84a6e0e4b322ceb81d09b42c20faa Mon Sep 17 00:00:00 2001
From: =?utf8?q?Olivier=20Cr=C3=AAte?= <olivier.crete@collabora.co.uk>
Date: Thu, 4 Dec 2008 21:21:44 -0500
Subject: [PATCH] [MOVED FROM GST-P-FARSIGHT] Allow setting a maximum duration
 to a RTP DTMF event

---
 gst/dtmf/gstrtpdtmfdepay.c | 28 +++++++++++++++++++++++++++-
 gst/dtmf/gstrtpdtmfdepay.h |  2 +-
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/gst/dtmf/gstrtpdtmfdepay.c b/gst/dtmf/gstrtpdtmfdepay.c
index 85dac6f..2032189 100644
--- a/gst/dtmf/gstrtpdtmfdepay.c
+++ b/gst/dtmf/gstrtpdtmfdepay.c
@@ -53,6 +53,8 @@
 #define MAX_UNIT_TIME            1000
 #define DEFAULT_UNIT_TIME        0
 
+#define DEFAULT_MAX_DURATION     0
+
 typedef struct st_dtmf_key {
         char *event_name;
         int event_encoding;
@@ -121,7 +123,8 @@ enum
 enum
 {
   PROP_0,
-  PROP_UNIT_TIME
+  PROP_UNIT_TIME,
+  PROP_MAX_DURATION
 };
 
 enum
@@ -204,6 +207,12 @@ gst_rtp_dtmf_depay_class_init (GstRtpDTMFDepayClass * klass)
         "The smallest unit (ms) the duration must be a multiple of (0 disables it)", MIN_UNIT_TIME,
         MAX_UNIT_TIME, DEFAULT_UNIT_TIME, G_PARAM_READWRITE));
 
+  g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_DURATION,
+    g_param_spec_uint ("max-duration", "Maximum duration",
+        "The maxumimum duration (ms) of the outgoing soundpacket. "
+        "(0 = no limit)", 0, G_MAXUINT, DEFAULT_MAX_DURATION,
+        G_PARAM_READWRITE));
+
   gstbasertpdepayload_class->process =
     GST_DEBUG_FUNCPTR (gst_rtp_dtmf_depay_process);
   gstbasertpdepayload_class->set_caps =
@@ -230,6 +239,9 @@ gst_rtp_dtmf_depay_set_property (GObject * object, guint prop_id,
     case PROP_UNIT_TIME:
       rtpdtmfdepay->unit_time = g_value_get_uint (value);
       break;
+    case PROP_MAX_DURATION:
+      rtpdtmfdepay->max_duration = g_value_get_uint (value);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -248,6 +260,9 @@ gst_rtp_dtmf_depay_get_property (GObject * object, guint prop_id,
     case PROP_UNIT_TIME:
       g_value_set_uint (value, rtpdtmfdepay->unit_time);
       break;
+    case PROP_MAX_DURATION:
+      g_value_set_uint (value, rtpdtmfdepay->max_duration);
+      break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -385,6 +400,17 @@ gst_rtp_dtmf_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
     }
   }
 
+  /* clip to max duration */
+  if (rtpdtmfdepay->max_duration)
+  {
+    guint max_duration_clock =
+        (rtpdtmfdepay->max_duration * depayload->clock_rate) / 1000;
+
+    if (max_duration_clock < G_MAXUINT16 &&
+        dtmf_payload.duration > max_duration_clock)
+      dtmf_payload.duration = max_duration_clock;
+  }
+
   GST_DEBUG_OBJECT (depayload, "Received new RTP DTMF packet : "
       "marker=%d - timestamp=%u - event=%d - duration=%d",
       marker, timestamp, dtmf_payload.event, dtmf_payload.duration);
diff --git a/gst/dtmf/gstrtpdtmfdepay.h b/gst/dtmf/gstrtpdtmfdepay.h
index e679fbb..4fb31a0 100644
--- a/gst/dtmf/gstrtpdtmfdepay.h
+++ b/gst/dtmf/gstrtpdtmfdepay.h
@@ -54,7 +54,7 @@ struct _GstRtpDTMFDepay
   guint16		previous_duration;
   GstClockTime		first_gst_ts;
   guint unit_time;
-
+  guint max_duration;
 };
 
 struct _GstRtpDTMFDepayClass
-- 
2.7.4