From e21a8cf4d417581ab5d59846ebc0bcef251d5716 Mon Sep 17 00:00:00 2001
From: "stefan@webrtc.org"
 <stefan@webrtc.org@4adac7df-926f-26a2-2b94-8c16560cd09d>
Date: Tue, 10 Jan 2012 08:37:33 +0000
Subject: [PATCH] Fix issue 211: Make sure we always generate at least one FEC
 packet per frame if we need protection.

BUG=211
TEST=

Review URL: http://webrtc-codereview.appspot.com/348002

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1363 4adac7df-926f-26a2-2b94-8c16560cd09d
---
 src/modules/rtp_rtcp/source/forward_error_correction.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/modules/rtp_rtcp/source/forward_error_correction.cc b/src/modules/rtp_rtcp/source/forward_error_correction.cc
index 4ca662b6b..3e0d4e34d 100644
--- a/src/modules/rtp_rtcp/source/forward_error_correction.cc
+++ b/src/modules/rtp_rtcp/source/forward_error_correction.cc
@@ -175,6 +175,11 @@ ForwardErrorCorrection::GenerateFEC(const ListWrapper& mediaPacketList,
     // Result in Q0 with an unsigned round.
     WebRtc_UWord32 numFecPackets = (numMediaPackets * protectionFactor +
                                    (1 << 7)) >> 8;
+    // Generate at least one FEC packet if we need protection.
+    if (protectionFactor > 0 && numFecPackets == 0)
+    {
+        numFecPackets = 1;
+    }
     if (numFecPackets == 0)
     {
         return 0;