Incorporating logging into Cast

media/cast/rtp_sender/rtp_sender.cc

Index: media/cast/rtp_sender/rtp_sender.cc
diff --git a/media/cast/rtp_sender/rtp_sender.cc b/media/cast/rtp_sender/rtp_sender.cc
index 37487a08be35374c5cce7f19c164ff575ab8422e..d222a56f84113bdc49f1070d4cee6ed4a3c30ef0 100644
--- a/media/cast/rtp_sender/rtp_sender.cc
+++ b/media/cast/rtp_sender/rtp_sender.cc
@@ -9,28 +9,31 @@
 #include "media/cast/cast_defines.h"
 #include "media/cast/pacing/paced_sender.h"
 #include "media/cast/rtcp/rtcp_defines.h"
+#include "net/base/big_endian.h"
 
 namespace media {
 namespace cast {
 
-RtpSender::RtpSender(base::TickClock* clock,
+RtpSender::RtpSender(scoped_refptr<CastEnvironment> cast_environment,
                      const AudioSenderConfig* audio_config,
                      const VideoSenderConfig* video_config,
                      PacedPacketSender* transport)
-    : config_(),
-      transport_(transport),
-      clock_(clock) {
+    : cast_environment_(cast_environment),
+      config_(),
+      transport_(transport) {
   // Store generic cast config and create packetizer config.
   DCHECK(audio_config || video_config) << "Invalid argument";
   if (audio_config) {
-    storage_.reset(new PacketStorage(clock, audio_config->rtp_history_ms));
+    storage_.reset(new PacketStorage(cast_environment->Clock(),
+                                     audio_config->rtp_history_ms));
     config_.audio = true;
     config_.ssrc = audio_config->sender_ssrc;
     config_.payload_type = audio_config->rtp_payload_type;
     config_.frequency = audio_config->frequency;
     config_.audio_codec = audio_config->codec;
   } else {
-    storage_.reset(new PacketStorage(clock, video_config->rtp_history_ms));
+    storage_.reset(new PacketStorage(cast_environment->Clock(),
+                                     video_config->rtp_history_ms));
     config_.audio = false;
     config_.ssrc = video_config->sender_ssrc;
     config_.payload_type = video_config->rtp_payload_type;
@@ -58,15 +61,52 @@ void RtpSender::IncomingEncodedAudioFrame(const EncodedAudioFrame* audio_frame,
 
 void RtpSender::ResendPackets(
     const MissingFramesAndPacketsMap& missing_frames_and_packets) {
-  PacketList packets_to_resend =
-      storage_->GetPackets(missing_frames_and_packets);
+  // Iterate over all frames in the list.
+  for (MissingFramesAndPacketsMap::const_iterator it =
+       missing_frames_and_packets.begin();
+       it != missing_frames_and_packets.end(); ++it) {
+    PacketList packets_to_resend;
+    uint8 frame_id = it->first;
+    const PacketIdSet& packets_set = it->second;
+    bool success = false;
 
-  PacketList::iterator it = packets_to_resend.begin();
-  for (; it != packets_to_resend.end(); ++it) {
-    Packet& packet = *it;
-    UpdateSequenceNumber(&packet);
+    if (packets_set.empty()) {
+      VLOG(1) << "Missing all packets in frame " << static_cast<int>(frame_id);
+
+      uint16 packet_id = 0;
+      do {
+        // Get packet from storage.
+        success = storage_->GetPacket(frame_id, packet_id, &packets_to_resend);
+
+        // Resend packet to the network.
+        if (success) {
+          VLOG(1) << "Resend " << static_cast<int>(frame_id)
+                  << ":" << packet_id;
+          // Set a unique incremental sequence number for every packet.
+          Packet& packet = packets_to_resend.back();
+          UpdateSequenceNumber(&packet);
+          // Set the size as correspond to each frame.
+          ++packet_id;
+        }
+      } while (success);
+    } else {
+      // Iterate over all of the packets in the frame.
+      for (PacketIdSet::const_iterator set_it = packets_set.begin();
+          set_it != packets_set.end(); ++set_it) {
+        uint16 packet_id = *set_it;
+        success = storage_->GetPacket(frame_id, packet_id, &packets_to_resend);
+
+        // Resend packet to the network.
+        if (success) {
+          VLOG(1) << "Resend " << static_cast<int>(frame_id)
+                  << ":" << packet_id;
+          Packet& packet = packets_to_resend.back();
+          UpdateSequenceNumber(&packet);
+        }
+      }
+    }
+    transport_->ResendPackets(packets_to_resend);
   }
-  transport_->ResendPackets(packets_to_resend);
 }
 
 void RtpSender::UpdateSequenceNumber(Packet* packet) {