From 102399153cc12f988c4e1039caab8cd159dd1019 Mon Sep 17 00:00:00 2001
From: Benny Prijono <bennylp@teluu.com>
Date: Tue, 4 Apr 2006 19:43:24 +0000
Subject: Changed RTCP timing to use high resolution timestamp

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@381 74dad513-b988-da41-8d7b-12977e46ad98
---
 pjmedia/include/pjmedia/rtcp.h |  6 +++++-
 pjmedia/src/pjmedia/rtcp.c     | 40 +++++++++++++++++++++++++++++++++-------
 pjmedia/src/pjmedia/stream.c   |  2 +-
 3 files changed, 39 insertions(+), 9 deletions(-)

(limited to 'pjmedia')

diff --git a/pjmedia/include/pjmedia/rtcp.h b/pjmedia/include/pjmedia/rtcp.h
index f39c7800..ccd32a20 100644
--- a/pjmedia/include/pjmedia/rtcp.h
+++ b/pjmedia/include/pjmedia/rtcp.h
@@ -27,6 +27,7 @@
 #include <pjmedia/types.h>
 #include <pjmedia/rtp.h>
 
+
 PJ_BEGIN_DECL
 
 
@@ -148,12 +149,14 @@ struct pjmedia_rtcp_session
     
     pjmedia_rtp_seq_session seq_ctrl;	/**< RTCP sequence number control.  */
 
+    unsigned	    clock_rate;	    /**< Clock rate.			    */
     pj_uint32_t	    received;       /**< # pkts received		    */
     pj_uint32_t	    expected_prior; /**< # pkts expected at last interval   */
     pj_uint32_t	    received_prior; /**< # pkts received at last interval   */
     pj_int32_t	    transit;        /**< Relative trans time for prev pkt   */
     pj_uint32_t	    jitter;	    /**< Estimated jitter		    */
-    
+    pj_timestamp    ts_freq;	    /**< System timestamp frequency.	    */
+
     pjmedia_rtcp_ntp_rec rtcp_lsr;	 /**< NTP ts in last SR received    */
     unsigned 		 rtcp_lsr_time;  /**< Time when last SR is received.*/
     pj_uint32_t		 peer_ssrc;	 /**< Peer SSRC			    */
@@ -173,6 +176,7 @@ typedef struct pjmedia_rtcp_session pjmedia_rtcp_session;
  * @param ssrc	    The SSRC used in to identify the session.
  */
 PJ_DECL(void) pjmedia_rtcp_init( pjmedia_rtcp_session *session, 
+				 unsigned clock_rate,
 				 pj_uint32_t ssrc );
 
 
diff --git a/pjmedia/src/pjmedia/rtcp.c b/pjmedia/src/pjmedia/rtcp.c
index 7bd5a7d8..3ce2783e 100644
--- a/pjmedia/src/pjmedia/rtcp.c
+++ b/pjmedia/src/pjmedia/rtcp.c
@@ -27,6 +27,8 @@
 #define RTCP_RR   201
 
 
+#define USE_TIMESTAMP	PJ_HAS_HIGH_RES_TIMER
+
 
 /*
  * Get NTP time.
@@ -45,12 +47,16 @@ static void rtcp_get_ntp_time(struct pjmedia_rtcp_ntp_rec *ntp)
 
 
 PJ_DEF(void) pjmedia_rtcp_init(pjmedia_rtcp_session *s, 
+			       unsigned clock_rate,
 			       pj_uint32_t ssrc)
 {
     pjmedia_rtcp_pkt *rtcp_pkt = &s->rtcp_pkt;
     
     pj_memset(rtcp_pkt, 0, sizeof(pjmedia_rtcp_pkt));
     
+    /* Set clock rate */
+    s->clock_rate = clock_rate;
+
     /* Init time */
     s->rtcp_lsr.hi = s->rtcp_lsr.lo = 0;
     s->rtcp_lsr_time = 0;
@@ -64,6 +70,11 @@ PJ_DEF(void) pjmedia_rtcp_init(pjmedia_rtcp_session *s,
     /* Init SR */
     rtcp_pkt->sr.ssrc = pj_htonl(ssrc);
     
+    /* Get timestamp frequency */
+#if USE_TIMESTAMP
+    pj_get_timestamp_freq(&s->ts_freq);
+#endif
+
     /* RR will be initialized on receipt of the first RTP packet. */
 }
 
@@ -90,8 +101,6 @@ PJ_DEF(void) pjmedia_rtcp_rx_rtp(pjmedia_rtcp_session *s,
 {   
     pj_uint32_t arrival;
     pj_int32_t transit;
-    unsigned long timer_tick;
-    pj_time_val tv;
     int status;
 
     /* Update sequence numbers (received, lost, etc). */
@@ -106,15 +115,32 @@ PJ_DEF(void) pjmedia_rtcp_rx_rtp(pjmedia_rtcp_session *s,
 
     ++s->received;
 
-    pj_gettimeofday(&tv);
-    timer_tick = tv.sec * 1000 + tv.msec;
-    
     /*
      * Calculate jitter (s->jitter is in timer tick unit)
      */
-    PJ_TODO(SUPPORT_JITTER_CALCULATION_FOR_NON_8KHZ_SAMPLE_RATE)
+#if USE_TIMESTAMP
+    {
+	pj_timestamp ts;
+
+	pj_get_timestamp(&ts);
+
+	/* Convert timestamp to samples */
+	ts.u64 = ts.u64 * s->clock_rate / s->ts_freq.u64;
+	arrival = (pj_uint32_t)ts.u64;
+    }
+#else
+    {
+	pj_time_val tv;
+	unsigned long timer_tick;
+
+	pj_gettimeofday(&tv);
+	timer_tick = tv.sec * 1000 + tv.msec;
+
+	/* Convert timer tick to samples */
+	arrival = timer_tick * s->clock_rate / 1000;
+    }
+#endif
 
-    arrival = timer_tick << 3;	// 8 samples per ms.
     transit = arrival - rtp_ts;
     
     if (s->transit == 0) {
diff --git a/pjmedia/src/pjmedia/stream.c b/pjmedia/src/pjmedia/stream.c
index 95d9a7c9..6f0d4881 100644
--- a/pjmedia/src/pjmedia/stream.c
+++ b/pjmedia/src/pjmedia/stream.c
@@ -738,7 +738,7 @@ PJ_DEF(pj_status_t) pjmedia_stream_create( pjmedia_endpt *endpt,
 
     /* Init RTCP session: */
 
-    pjmedia_rtcp_init(&stream->rtcp, info->ssrc);
+    pjmedia_rtcp_init(&stream->rtcp, info->fmt.sample_rate, info->ssrc);
 
 
     /* Create jitter buffer: */
-- 
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