From e5f1ac31a821436da3915d485193c4f536b6f9db Mon Sep 17 00:00:00 2001
From: Phil Taylor <phil@m0vse.uk>
Date: Tue, 2 Mar 2021 14:35:33 +0000
Subject: [PATCH] Identify if we have missing audio seq numbers.

---
 audiohandler.cpp | 9 +++++++--
 audiohandler.h   | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/audiohandler.cpp b/audiohandler.cpp
index 23bcef7..13e4614 100644
--- a/audiohandler.cpp
+++ b/audiohandler.cpp
@@ -959,8 +959,9 @@ qint64 audioHandler::readData(char* data, qint64 maxlen)
 				//qDebug(logAudio()) << "Packet " << hex << packet->seq << " arrived too late (increase rx buffer size!) " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
 				packet = audioBuffer.erase(packet); // returns next packet
 			}
-			else //if (timediff > (int)latency / 2)
+			else if (packet->seq == lastSeq+1 || packet->seq <= lastSeq)
 			{
+				lastSeq = packet->seq;
 				//qDebug(logAudio()) << "Packet " << hex << packet->seq << " arrived on time " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
 				// Will this packet fit in the current buffer?
 				int send = qMin((int)((maxlen/divisor) - (sentlen/divisor)), packet->data.length() - packet->sent);
@@ -992,6 +993,7 @@ qint64 audioHandler::readData(char* data, qint64 maxlen)
 
 				if (send == packet->data.length())
 				{
+					lastSeq = packet->seq;
 					packet = audioBuffer.erase(packet); // returns next packet
 					if (maxlen - sentlen == 0)
 					{						
@@ -1010,7 +1012,10 @@ qint64 audioHandler::readData(char* data, qint64 maxlen)
 					qDebug(logAudio()) << "Packet " << hex << packet->seq << " is partial, sent=" << dec << packet->sent << " sentlen=" << sentlen;
 					break;
 				}
-			} 
+			} else {
+				qDebug(logAudio()) << "Missing audio packet(s) from: " << lastSeq + 1 << " to " << packet->seq - 1;
+				lastSeq = packet->seq;
+			}
 		}
 	}
 
diff --git a/audiohandler.h b/audiohandler.h
index b5946e2..27f86e7 100644
--- a/audiohandler.h
+++ b/audiohandler.h
@@ -82,6 +82,7 @@ private:
     bool            isInput;   // Used to determine whether input or output audio
     float           volume;
     int             chunkSize;
+    quint16         lastSeq;
 
     QAudioFormat     format;
     QAudioDeviceInfo deviceInfo;