[rtp_rtcp] Append functionality moved from base RtcpPacket class to CompoundPacket

webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.cc b/webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.cc
index 8f5afd5dd176e8a6c1426d77a924b1ef98809254..eead45d37018b75fb4629cfc1a9a138a560d1f73 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.cc
@@ -10,18 +10,33 @@
 
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/compound_packet.h"
 
+#include "webrtc/base/checks.h"
+
 namespace webrtc {
 namespace rtcp {
 
+void CompoundPacket::Append(RtcpPacket* packet) {
+  RTC_CHECK(packet);
+  appended_packets_.push_back(packet);
+}
+
 bool CompoundPacket::Create(uint8_t* packet,
                             size_t* index,
                             size_t max_length,
                             RtcpPacket::PacketReadyCallback* callback) const {
+  for (RtcpPacket* appended : appended_packets_) {
+    if (!appended->Create(packet, index, max_length, callback))
+      return false;
+  }
   return true;
 }
 
 size_t CompoundPacket::BlockLength() const {
-  return 0;
+  size_t block_length = 0;
+  for (RtcpPacket* appended : appended_packets_) {
+    block_length += appended->BlockLength();
+  }
+  return block_length;
 }
 
 }  // namespace rtcp