Changeset 442

Timestamp:

May 14, 2006 6:23:34 PM (18 years ago)

Author:

bennylp

Message:

Fixed more bugs with multiple frame handling

Location:

pjproject/trunk

Files:

• pjmedia/include/pjmedia/jbuf.h (modified) (2 diffs)
• pjmedia/src/pjmedia/conference.c (modified) (3 diffs)
• pjmedia/src/pjmedia/jbuf.c (modified) (10 diffs)
• pjmedia/src/pjmedia/stream.c (modified) (12 diffs)
• pjsip-apps/src/samples/siprtp_report.c (modified) (1 diff)

pjproject/trunk/pjmedia/include/pjmedia/jbuf.h

@@ -112 +112 @@
  *                      delay that may be introduced by this jitter 
  *                      buffer.
+ * @param ptime         Indication of frame duration, used to calculate 
+ *                      the interval between jitter recalculation.
  * @param p_jb          Pointer to receive jitter buffer instance.
  *
@@ -119 +121 @@
                                          const pj_str_t *name,
                                          unsigned frame_size,
+                                         unsigned ptime,
                                          unsigned max_count,
                                          pjmedia_jbuf **p_jb);

pjproject/trunk/pjmedia/src/pjmedia/conference.c

@@ -1096 +1096 @@
      * transmit NULL frame. 
      */
+    /* note:
+     *  the "cport->sources==0" checking will cause discontinuous
+     *  transmission for RTP stream.
+     */
     if (cport->tx_setting == PJMEDIA_PORT_MUTE || cport->sources==0) {
 
@@ -1125 +1129 @@
     buf = (pj_int16_t*)cport->mix_buf;
 
-    if (cport->tx_adj_level != NORMAL_LEVEL) {
+    if (cport->tx_adj_level != NORMAL_LEVEL && cport->sources) {
 
         unsigned adj_level = cport->tx_adj_level;
@@ -1169 +1173 @@
      * indication of the signal level of the port.
      */
-    if (cport->need_tx_level) {
+    if (cport->need_tx_level && cport->sources) {
         pj_uint32_t level;
 

pjproject/trunk/pjmedia/src/pjmedia/jbuf.c

@@ -51 +51 @@
     jb_framelist    jb_framelist;
     pj_size_t       jb_frame_size;        // frame size 
+    unsigned        jb_frame_ptime;       // frame duration.
     pj_size_t       jb_max_count;         // max frames in the jitter framelist->flist_buffer
 
@@ -81 +82 @@
 
 
+/* Enabling this would log the jitter buffer state about once per 
+ * second.
+ */
+#if 0
+#  define TRACE__(args)     PJ_LOG(4,args)
+#else
+#  define TRACE__(args)
+#endif
+
 
 static pj_status_t jb_framelist_init( pj_pool_t *pool,
@@ -268 +278 @@
                                         const pj_str_t *name,
                                         unsigned frame_size, 
+                                        unsigned ptime,
                                         unsigned max_count,
                                         pjmedia_jbuf **p_jb)
@@ -282 +293 @@
     pj_strdup_with_null(pool, &jb->name, name);
     jb->jb_frame_size    = frame_size;
+    jb->jb_frame_ptime   = ptime;
     jb->jb_last_seq_no   = -1;
     jb->jb_level         = 0;
@@ -368 +380 @@
 static void jbuf_calculate_jitter(pjmedia_jbuf *jb)
 {
-    enum { STABLE_HISTORY_LIMIT = (100*2) };
+    unsigned stable_history_limit;
+
+    stable_history_limit = 1000 / jb->jb_frame_ptime;
 
     jb->jb_last_jitter = PJ_ABS(jb->jb_level-jb->jb_last_level);
@@ -377 +391 @@
     if (jb->jb_last_jitter < jb->jb_prefetch) {
         jb->jb_stable_hist += jb->jb_last_jitter;
-        if (jb->jb_stable_hist > STABLE_HISTORY_LIMIT) {
+        if (jb->jb_stable_hist > (int)stable_history_limit) {
             int seq_diff = (jb->jb_prefetch - jb->jb_max_hist_jitter)/3;
             if (seq_diff<1) seq_diff = 1;
@@ -388 +402 @@
             jb->jb_max_hist_jitter = 0;
 
-            if (jb->jb_op_count >= STABLE_HISTORY_LIMIT*2 &&
+            TRACE__((THIS_FILE,"jb updated(1), prefetch=%d, size=%d", 
+                     jb->jb_prefetch, jb_framelist_size(&jb->jb_framelist)));
+
+            /* These code is used to shorten the delay in the jitter buffer.
+
+            if (jb->jb_op_count >= stable_history_limit*2 &&
                 (int)jb_framelist_size(&jb->jb_framelist) > jb->jb_prefetch+2)
             {
@@ -399 +418 @@
                 jb->jb_op_count = 0;
             }
+            */
 
         }
@@ -409 +429 @@
         jb->jb_max_hist_jitter = 0;
 
-        if (jb->jb_op_count >= STABLE_HISTORY_LIMIT * 2) {
+        TRACE__((THIS_FILE,"jb updated(2), prefetch=%d, size=%d", 
+                 jb->jb_prefetch, jb_framelist_size(&jb->jb_framelist)));
+
+        /* These code is used to shorten the delay in the jitter buffer
+           when the current size is larger than the prefetch. But it does
+           not really work when the stream supports multiple frames, since
+           the size may grow only temporarily.
+
+        if (jb->jb_op_count >= stable_history_limit * 2) {
             if ((int)jb_framelist_size(&jb->jb_framelist) > jb->jb_prefetch+2) 
             {
@@ -422 +450 @@
             jb->jb_op_count = 0;
         }
+        */
     }
 }

pjproject/trunk/pjmedia/src/pjmedia/stream.c

@@ -41 +41 @@
 #define TRC_(expr)                      PJ_LOG(5,expr)
 
+#define BYTES_PER_SAMPLE                2
+
 /**
  * Media channel.
@@ -55 +57 @@
     void                   *out_pkt;        /**< Output buffer.             */
     pjmedia_rtp_session     rtp;            /**< RTP session.               */
+    char                    last_frm_type;  /**< Last frame type from jb    */
 };
 
@@ -153 +156 @@
     pjmedia_stream *stream = port->user_data;
     pjmedia_channel *channel = stream->dec;
-    
-    pj_status_t status;
     unsigned samples_count, samples_per_frame, samples_required;
     pj_int16_t *p_out_samp;
+    pj_status_t status;
+
 
     /* Return no frame is channel is paused */
@@ -181 +184 @@
          samples_count += samples_per_frame) 
     {
-         char frame_type;
+        char frame_type;
 
         /* Get frame from jitter buffer. */
@@ -199 +202 @@
                                                        frame_out.size,
                                                        &frame_out);
+
             } else {
                 status = -1;
@@ -207 +211 @@
                 pjmedia_zero_samples(p_out_samp + samples_count,
                                      samples_required - samples_count);
+                PJ_LOG(5,(stream->port.info.name.ptr,  "Frame lost!"));
+
+            } else {
+                PJ_LOG(5,(stream->port.info.name.ptr, 
+                          "Lost frame recovered"));
             }
             
         } else if (frame_type == PJMEDIA_JB_ZERO_EMPTY_FRAME) {
 
-            /* Jitter buffer is empty, zero the remaining samples and break
-             * the loop.
+            /* Jitter buffer is empty. If this is the first "empty" state,
+             * activate PLC to smoothen the fade-out, otherwise zero
+             * the frame. 
              */
-            pjmedia_zero_samples(p_out_samp + samples_count,
-                                 samples_required - samples_count);
+            if (frame_type != channel->last_frm_type) {
+                pjmedia_jb_state jb_state;
+
+                /* Activate PLC to smoothen the missing frame */
+                if (stream->codec->op->recover && 
+                    stream->codec_param.setting.plc) 
+                {
+                    pjmedia_frame frame_out;
+
+                    do {
+                        frame_out.buf = p_out_samp + samples_count;
+                        frame_out.size = frame->size - samples_count*2;
+                        status = (*stream->codec->op->recover)(stream->codec,
+                                                               frame_out.size,
+                                                               &frame_out);
+                        if (status != PJ_SUCCESS)
+                            break;
+                        samples_count += samples_per_frame;
+
+                    } while (samples_count < samples_required);
+
+                } 
+
+                /* Report the state of jitter buffer */
+                pjmedia_jbuf_get_state(stream->jb, &jb_state);
+                PJ_LOG(5,(stream->port.info.name.ptr, 
+                          "Jitter buffer empty (prefetch=%d)", 
+                          jb_state.prefetch));
+
+            }
+
+            if (samples_count < samples_required) {
+                pjmedia_zero_samples(p_out_samp + samples_count,
+                                     samples_required - samples_count);
+            }
+
+            channel->last_frm_type = frame_type;
             break;
 
         } else if (frame_type != PJMEDIA_JB_NORMAL_FRAME) {
+
+            pjmedia_jb_state jb_state;
 
             /* It can only be PJMEDIA_JB_ZERO_PREFETCH frame */
             pj_assert(frame_type == PJMEDIA_JB_ZERO_PREFETCH_FRAME);
 
-            /* Zero frame returned. We should zero the PCM buffer then.. */
-            pjmedia_zero_samples(p_out_samp + samples_count, 
-                                 samples_per_frame);
+            /* Get the state of jitter buffer */
+            pjmedia_jbuf_get_state(stream->jb, &jb_state);
+
+            /* Always activate PLC when it's available.. */
+            if (stream->codec->op->recover && 
+                stream->codec_param.setting.plc) 
+            {
+                pjmedia_frame frame_out;
+
+                do {
+                    frame_out.buf = p_out_samp + samples_count;
+                    frame_out.size = frame->size - samples_count*2;
+                    status = (*stream->codec->op->recover)(stream->codec,
+                                                           frame_out.size,
+                                                           &frame_out);
+                    if (status != PJ_SUCCESS)
+                        break;
+                    samples_count += samples_per_frame;
+
+                } while (samples_count < samples_required);
+
+                PJ_LOG(5,(stream->port.info.name.ptr, 
+                          "Jitter buffer is bufferring with plc (prefetch=%d)",
+                          jb_state.prefetch));
+
+            } 
+
+            if (samples_count < samples_required) {
+                pjmedia_zero_samples(p_out_samp + samples_count,
+                                     samples_required - samples_count);
+                PJ_LOG(5,(stream->port.info.name.ptr, 
+                          "Jitter buffer is bufferring (prefetch=%d)..", 
+                          jb_state.prefetch));
+            }
+
+            channel->last_frm_type = frame_type;
+            break;
 
         } else {
@@ -237 +318 @@
 
             frame_out.buf = p_out_samp + samples_count;
-            frame_out.size = frame->size - samples_count*2;
+            frame_out.size = frame->size - samples_count*BYTES_PER_SAMPLE;
             status = stream->codec->op->decode( stream->codec, &frame_in,
                                                 frame_out.size, &frame_out);
@@ -248 +329 @@
             }
         }
+
+        channel->last_frm_type = frame_type;
     }
 
@@ -262 +345 @@
     } else {
         frame->type = PJMEDIA_FRAME_TYPE_AUDIO;
-        frame->size = samples_count * 2;
+        frame->size = samples_count * BYTES_PER_SAMPLE;
         frame->timestamp.u64 = 0;
     }
@@ -498 +581 @@
 
     pj_memcpy(channel->out_pkt, rtphdr, sizeof(pjmedia_rtp_hdr));
+
 
     /* Send. */
@@ -1030 +1114 @@
         jb_max = info->jb_max;
     else
-        jb_max = 240 / (stream->port.info.samples_per_frame * 1000 / 
-                           info->fmt.clock_rate);
+        jb_max = 360 / stream->codec_param.info.frm_ptime;
 
     if (info->jb_min_pre >= 0)
         jb_min_pre = info->jb_min_pre;
     else
-        jb_min_pre = 0;
+        jb_min_pre = 60 / stream->codec_param.info.frm_ptime;
 
     if (info->jb_max_pre > 0)
         jb_max_pre = info->jb_max_pre;
     else
-        jb_max_pre = jb_max * 4 / 5;
+        jb_max_pre = 240 / stream->codec_param.info.frm_ptime;
 
     if (info->jb_init >= 0)
         jb_init = info->jb_init;
     else
-        jb_init = jb_min_pre;
+        jb_init = (jb_min_pre + jb_max_pre) / 2;
 
 
@@ -1052 +1135 @@
     status = pjmedia_jbuf_create(pool, &stream->port.info.name,
                                  stream->frame_size, 
+                                 stream->codec_param.info.frm_ptime,
                                  jb_max, &stream->jb);
     if (status != PJ_SUCCESS)

pjproject/trunk/pjsip-apps/src/samples/siprtp_report.c

@@ -60 +60 @@
 
     /* Print duration */
-    if (inv->state >= PJSIP_INV_STATE_CONFIRMED) {
+    if (inv->state >= PJSIP_INV_STATE_CONFIRMED && call->connect_time) {
 
         PJ_TIME_VAL_SUB(now, call->connect_time);