Add callbacks for receive channel RTP statistics

This allows a listener to receive new statistics (byte/packet counts, etc) as it
is generated - avoiding the need to poll. This also makes handling stats from
multiple RTP streams more tractable. The change is primarily targeted at the new
video engine API.

TEST=Unit test in ReceiveStatisticsTest.
Integration tests to follow as call tests when fully wired up.

BUG=2235
R=mflodman@webrtc.org, pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/6259004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5416 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 26 insertions, 6 deletions

diff --git a/video_engine/vie_rtp_rtcp_impl.cc b/video_engine/vie_rtp_rtcp_impl.cc
index d9f2211d..b655349d 100644
--- a/video_engine/vie_rtp_rtcp_impl.cc
+++ b/video_engine/vie_rtp_rtcp_impl.cc
@@ -1224,15 +1224,35 @@ int ViERTP_RTCPImpl::DeregisterSendChannelRtpStatisticsCallback(
 }
 
 int ViERTP_RTCPImpl::RegisterReceiveChannelRtpStatisticsCallback(
-    int channel, StreamDataCountersCallback* callback) {
-  // TODO(sprang): Implement
-  return -1;
+    const int video_channel,
+    StreamDataCountersCallback* callback) {
+  WEBRTC_TRACE(kTraceApiCall,
+               kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d)",
+               __FUNCTION__,
+               video_channel);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  assert(vie_channel != NULL);
+  vie_channel->RegisterReceiveChannelRtpStatisticsCallback(callback);
+  return 0;
 }
 
 int ViERTP_RTCPImpl::DeregisterReceiveChannelRtpStatisticsCallback(
-    int channel, StreamDataCountersCallback* callback) {
-  // TODO(sprang): Implement
-  return -1;
+    const int video_channel,
+    StreamDataCountersCallback* callback) {
+  WEBRTC_TRACE(kTraceApiCall,
+               kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d)",
+               __FUNCTION__,
+               video_channel);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  assert(vie_channel != NULL);
+  vie_channel->RegisterReceiveChannelRtpStatisticsCallback(NULL);
+  return 0;
 }
 
 // Called whenever the send bitrate is updated.