Initial import.

1 files changed, 1103 insertions, 0 deletions

diff --git a/chromium/third_party/webrtc/video_engine/vie_rtp_rtcp_impl.cc b/chromium/third_party/webrtc/video_engine/vie_rtp_rtcp_impl.cc
new file mode 100644
index 00000000000..d8ead1278d4
--- /dev/null
+++ b/chromium/third_party/webrtc/video_engine/vie_rtp_rtcp_impl.cc
@@ -0,0 +1,1103 @@
+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/video_engine/vie_rtp_rtcp_impl.h"
+
+#include "webrtc/engine_configurations.h"
+#include "webrtc/system_wrappers/interface/file_wrapper.h"
+#include "webrtc/system_wrappers/interface/trace.h"
+#include "webrtc/video_engine/include/vie_errors.h"
+#include "webrtc/video_engine/vie_channel.h"
+#include "webrtc/video_engine/vie_channel_manager.h"
+#include "webrtc/video_engine/vie_defines.h"
+#include "webrtc/video_engine/vie_encoder.h"
+#include "webrtc/video_engine/vie_impl.h"
+#include "webrtc/video_engine/vie_shared_data.h"
+
+namespace webrtc {
+
+// Helper methods for converting between module format and ViE API format.
+
+static RTCPMethod ViERTCPModeToRTCPMethod(ViERTCPMode api_mode) {
+  switch (api_mode) {
+    case kRtcpNone:
+      return kRtcpOff;
+
+    case kRtcpCompound_RFC4585:
+      return kRtcpCompound;
+
+    case kRtcpNonCompound_RFC5506:
+      return kRtcpNonCompound;
+  }
+  assert(false);
+  return kRtcpOff;
+}
+
+static ViERTCPMode RTCPMethodToViERTCPMode(RTCPMethod module_method) {
+  switch (module_method) {
+    case kRtcpOff:
+      return kRtcpNone;
+
+    case kRtcpCompound:
+      return kRtcpCompound_RFC4585;
+
+    case kRtcpNonCompound:
+      return kRtcpNonCompound_RFC5506;
+  }
+  assert(false);
+  return kRtcpNone;
+}
+
+static KeyFrameRequestMethod APIRequestToModuleRequest(
+  ViEKeyFrameRequestMethod api_method) {
+  switch (api_method) {
+    case kViEKeyFrameRequestNone:
+      return kKeyFrameReqFirRtp;
+
+    case kViEKeyFrameRequestPliRtcp:
+      return kKeyFrameReqPliRtcp;
+
+    case kViEKeyFrameRequestFirRtp:
+      return kKeyFrameReqFirRtp;
+
+    case kViEKeyFrameRequestFirRtcp:
+      return kKeyFrameReqFirRtcp;
+  }
+  assert(false);
+  return kKeyFrameReqFirRtp;
+}
+
+ViERTP_RTCP* ViERTP_RTCP::GetInterface(VideoEngine* video_engine) {
+#ifdef WEBRTC_VIDEO_ENGINE_RTP_RTCP_API
+  if (!video_engine) {
+    return NULL;
+  }
+  VideoEngineImpl* vie_impl = static_cast<VideoEngineImpl*>(video_engine);
+  ViERTP_RTCPImpl* vie_rtpimpl = vie_impl;
+  // Increase ref count.
+  (*vie_rtpimpl)++;
+  return vie_rtpimpl;
+#else
+  return NULL;
+#endif
+}
+
+int ViERTP_RTCPImpl::Release() {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo, shared_data_->instance_id(),
+               "ViERTP_RTCP::Release()");
+  // Decrease ref count.
+  (*this)--;
+
+  int32_t ref_count = GetCount();
+  if (ref_count < 0) {
+    WEBRTC_TRACE(kTraceWarning, kTraceVideo, shared_data_->instance_id(),
+                 "ViERTP_RTCP release too many times");
+    shared_data_->SetLastError(kViEAPIDoesNotExist);
+    return -1;
+  }
+  WEBRTC_TRACE(kTraceInfo, kTraceVideo, shared_data_->instance_id(),
+               "ViERTP_RTCP reference count: %d", ref_count);
+  return ref_count;
+}
+
+ViERTP_RTCPImpl::ViERTP_RTCPImpl(ViESharedData* shared_data)
+    : shared_data_(shared_data) {
+  WEBRTC_TRACE(kTraceMemory, kTraceVideo, shared_data_->instance_id(),
+               "ViERTP_RTCPImpl::ViERTP_RTCPImpl() Ctor");
+}
+
+ViERTP_RTCPImpl::~ViERTP_RTCPImpl() {
+  WEBRTC_TRACE(kTraceMemory, kTraceVideo, shared_data_->instance_id(),
+               "ViERTP_RTCPImpl::~ViERTP_RTCPImpl() Dtor");
+}
+
+int ViERTP_RTCPImpl::SetLocalSSRC(const int video_channel,
+                                  const unsigned int SSRC,
+                                  const StreamType usage,
+                                  const unsigned char simulcast_idx) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, SSRC: %d)", __FUNCTION__, video_channel, SSRC);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    // The channel doesn't exists
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetSSRC(SSRC, usage, simulcast_idx) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetRemoteSSRCType(const int videoChannel,
+                                       const StreamType usage,
+                                       const unsigned int SSRC) const {
+  WEBRTC_TRACE(webrtc::kTraceApiCall, webrtc::kTraceVideo,
+               ViEId(shared_data_->instance_id(), videoChannel),
+               "%s(channel: %d, usage:%d SSRC: 0x%x)",
+               __FUNCTION__, usage, videoChannel, SSRC);
+
+  // Get the channel
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* ptrViEChannel = cs.Channel(videoChannel);
+  if (ptrViEChannel == NULL) {
+    // The channel doesn't exists
+    WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo,
+                 ViEId(shared_data_->instance_id(), videoChannel),
+                 "%s: Channel %d doesn't exist",
+                 __FUNCTION__, videoChannel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (ptrViEChannel->SetRemoteSSRCType(usage, SSRC) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetLocalSSRC(const int video_channel,
+                                  unsigned int& SSRC) const {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, SSRC: %d)", __FUNCTION__, video_channel, SSRC);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  uint8_t idx = 0;
+  if (vie_channel->GetLocalSSRC(idx, &SSRC) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetRemoteSSRC(const int video_channel,
+                                   unsigned int& SSRC) const {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d)", __FUNCTION__, video_channel, SSRC);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->GetRemoteSSRC(&SSRC) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetRemoteCSRCs(const int video_channel,
+                                    unsigned int CSRCs[kRtpCsrcSize]) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->GetRemoteCSRC(CSRCs) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetRtxSendPayloadType(const int video_channel,
+                                           const uint8_t payload_type) {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetRtxSendPayloadType(payload_type) != 0) {
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetRtxReceivePayloadType(const int video_channel,
+                                              const uint8_t payload_type) {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  vie_channel->SetRtxReceivePayloadType(payload_type);
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetStartSequenceNumber(const int video_channel,
+                                            uint16_t sequence_number) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, sequence_number: %u)", __FUNCTION__,
+               video_channel, sequence_number);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->Sending()) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d already sending.", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpAlreadySending);
+    return -1;
+  }
+  if (vie_channel->SetStartSequenceNumber(sequence_number) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetRTCPStatus(const int video_channel,
+                                   const ViERTCPMode rtcp_mode) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, mode: %d)", __FUNCTION__, video_channel,
+               rtcp_mode);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+
+  RTCPMethod module_mode = ViERTCPModeToRTCPMethod(rtcp_mode);
+  if (vie_channel->SetRTCPMode(module_mode) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetRTCPStatus(const int video_channel,
+                                   ViERTCPMode& rtcp_mode) const {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d)", __FUNCTION__, video_channel, rtcp_mode);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  RTCPMethod module_mode = kRtcpOff;
+  if (vie_channel->GetRTCPMode(&module_mode) != 0) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: could not get current RTCP mode", __FUNCTION__);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  rtcp_mode = RTCPMethodToViERTCPMode(module_mode);
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetRTCPCName(const int video_channel,
+                                  const char rtcp_cname[KMaxRTCPCNameLength]) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, name: %s)", __FUNCTION__, video_channel,
+               rtcp_cname);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->Sending()) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d already sending.", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpAlreadySending);
+    return -1;
+  }
+  if (vie_channel->SetRTCPCName(rtcp_cname) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetRTCPCName(const int video_channel,
+                                  char rtcp_cname[KMaxRTCPCNameLength]) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->GetRTCPCName(rtcp_cname) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetRemoteRTCPCName(
+    const int video_channel,
+    char rtcp_cname[KMaxRTCPCNameLength]) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->GetRemoteRTCPCName(rtcp_cname) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SendApplicationDefinedRTCPPacket(
+  const int video_channel,
+  const unsigned char sub_type,
+  unsigned int name,
+  const char* data,
+  uint16_t data_length_in_bytes) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, sub_type: %c, name: %d, data: x, length: %u)",
+               __FUNCTION__, video_channel, sub_type, name,
+               data_length_in_bytes);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (!vie_channel->Sending()) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d not sending", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpNotSending);
+    return -1;
+  }
+  RTCPMethod method;
+  if (vie_channel->GetRTCPMode(&method) != 0 || method == kRtcpOff) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: RTCP disabled on channel %d.", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpRtcpDisabled);
+    return -1;
+  }
+  if (vie_channel->SendApplicationDefinedRTCPPacket(
+        sub_type, name, reinterpret_cast<const uint8_t*>(data),
+        data_length_in_bytes) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetNACKStatus(const int video_channel, const bool enable) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, enable: %d)", __FUNCTION__, video_channel,
+               enable);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetNACKStatus(enable) != 0) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: failed for channel %d", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+
+  // Update the encoder
+  ViEEncoder* vie_encoder = cs.Encoder(video_channel);
+  if (!vie_encoder) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Could not get encoder for channel %d", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  vie_encoder->UpdateProtectionMethod();
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetFECStatus(const int video_channel, const bool enable,
+                                  const unsigned char payload_typeRED,
+                                  const unsigned char payload_typeFEC) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, enable: %d, payload_typeRED: %u, "
+               "payloadTypeFEC: %u)",
+               __FUNCTION__, video_channel, enable, payload_typeRED,
+               payload_typeFEC);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetFECStatus(enable, payload_typeRED,
+                                payload_typeFEC) != 0) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: failed for channel %d", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  // Update the encoder.
+  ViEEncoder* vie_encoder = cs.Encoder(video_channel);
+  if (!vie_encoder) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Could not get encoder for channel %d", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  vie_encoder->UpdateProtectionMethod();
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetHybridNACKFECStatus(
+    const int video_channel,
+    const bool enable,
+    const unsigned char payload_typeRED,
+    const unsigned char payload_typeFEC) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, enable: %d, payload_typeRED: %u, "
+               "payloadTypeFEC: %u)",
+               __FUNCTION__, video_channel, enable, payload_typeRED,
+               payload_typeFEC);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+
+  // Update the channel status with hybrid NACK FEC mode.
+  if (vie_channel->SetHybridNACKFECStatus(enable, payload_typeRED,
+                                          payload_typeFEC) != 0) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: failed for channel %d", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+
+  // Update the encoder.
+  ViEEncoder* vie_encoder = cs.Encoder(video_channel);
+  if (!vie_encoder) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Could not get encoder for channel %d", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  vie_encoder->UpdateProtectionMethod();
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetSenderBufferingMode(int video_channel,
+                                               int target_delay_ms) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, sender target_delay: %d)",
+               __FUNCTION__, video_channel, target_delay_ms);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  ViEEncoder* vie_encoder = cs.Encoder(video_channel);
+  if (!vie_encoder) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Could not get encoder for channel %d", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+
+  // Update the channel with buffering mode settings.
+  if (vie_channel->SetSenderBufferingMode(target_delay_ms) != 0) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: failed for channel %d", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+
+  // Update the encoder's buffering mode settings.
+  vie_encoder->SetSenderBufferingMode(target_delay_ms);
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetReceiverBufferingMode(int video_channel,
+                                                 int target_delay_ms) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, receiver target_delay: %d)",
+               __FUNCTION__, video_channel, target_delay_ms);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+
+  // Update the channel with buffering mode settings.
+  if (vie_channel->SetReceiverBufferingMode(target_delay_ms) != 0) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: failed for channel %d", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetKeyFrameRequestMethod(
+  const int video_channel,
+  const ViEKeyFrameRequestMethod method) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, method: %d)", __FUNCTION__, video_channel,
+               method);
+
+  // Get the channel.
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  KeyFrameRequestMethod module_method = APIRequestToModuleRequest(method);
+  if (vie_channel->SetKeyFrameRequestMethod(module_method) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetTMMBRStatus(const int video_channel,
+                                    const bool enable) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, enable: %d)", __FUNCTION__, video_channel,
+               enable);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->EnableTMMBR(enable) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetRembStatus(int video_channel, bool sender,
+                                   bool receiver) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "ViERTP_RTCPImpl::SetRembStatus(%d, %d, %d)", video_channel,
+               sender, receiver);
+  if (!shared_data_->channel_manager()->SetRembStatus(video_channel, sender,
+                                                      receiver)) {
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetSendTimestampOffsetStatus(int video_channel,
+                                                  bool enable,
+                                                  int id) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "ViERTP_RTCPImpl::SetSendTimestampOffsetStatus(%d, %d, %d)",
+               video_channel, enable, id);
+
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetSendTimestampOffsetStatus(enable, id) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetReceiveTimestampOffsetStatus(int video_channel,
+                                                     bool enable,
+                                                     int id) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "ViERTP_RTCPImpl::SetReceiveTimestampOffsetStatus(%d, %d, %d)",
+               video_channel, enable, id);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetReceiveTimestampOffsetStatus(enable, id) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetSendAbsoluteSendTimeStatus(int video_channel,
+                                                   bool enable,
+                                                   int id) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "ViERTP_RTCPImpl::SetSendAbsoluteSendTimeStatus(%d, %d, %d)",
+               video_channel, enable, id);
+
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->SetSendAbsoluteSendTimeStatus(enable, id) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetReceiveAbsoluteSendTimeStatus(int video_channel,
+                                                      bool enable,
+                                                      int id) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "ViERTP_RTCPImpl::SetReceiveAbsoluteSendTimeStatus(%d, %d, %d)",
+               video_channel, enable, id);
+  if (!shared_data_->channel_manager()->SetReceiveAbsoluteSendTimeStatus(
+      video_channel, enable, id)) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::SetTransmissionSmoothingStatus(int video_channel,
+                                                    bool enable) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, enble: %d)", __FUNCTION__, video_channel,
+               enable);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  vie_channel->SetTransmissionSmoothingStatus(enable);
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetReceivedRTCPStatistics(const int video_channel,
+                                               uint16_t& fraction_lost,
+                                               unsigned int& cumulative_lost,
+                                               unsigned int& extended_max,
+                                               unsigned int& jitter,
+                                               int& rtt_ms) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->GetReceivedRtcpStatistics(&fraction_lost,
+                                             &cumulative_lost,
+                                             &extended_max,
+                                             &jitter,
+                                             &rtt_ms) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetSentRTCPStatistics(const int video_channel,
+                                           uint16_t& fraction_lost,
+                                           unsigned int& cumulative_lost,
+                                           unsigned int& extended_max,
+                                           unsigned int& jitter,
+                                           int& rtt_ms) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+
+  if (vie_channel->GetSendRtcpStatistics(&fraction_lost, &cumulative_lost,
+                                         &extended_max, &jitter,
+                                         &rtt_ms) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetRTPStatistics(const int video_channel,
+                                      unsigned int& bytes_sent,
+                                      unsigned int& packets_sent,
+                                      unsigned int& bytes_received,
+                                      unsigned int& packets_received) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->GetRtpStatistics(&bytes_sent,
+                                    &packets_sent,
+                                    &bytes_received,
+                                    &packets_received) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetBandwidthUsage(const int video_channel,
+                                       unsigned int& total_bitrate_sent,
+                                       unsigned int& video_bitrate_sent,
+                                       unsigned int& fec_bitrate_sent,
+                                       unsigned int& nackBitrateSent) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  vie_channel->GetBandwidthUsage(&total_bitrate_sent,
+                                 &video_bitrate_sent,
+                                 &fec_bitrate_sent,
+                                 &nackBitrateSent);
+  return 0;
+}
+
+int ViERTP_RTCPImpl::GetEstimatedSendBandwidth(
+    const int video_channel,
+    unsigned int* estimated_bandwidth) const {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d)", __FUNCTION__, video_channel);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEEncoder* vie_encoder = cs.Encoder(video_channel);
+  if (!vie_encoder) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Could not get encoder for channel %d", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  return vie_encoder->EstimatedSendBandwidth(
+      static_cast<uint32_t*>(estimated_bandwidth));
+}
+
+int ViERTP_RTCPImpl::GetEstimatedReceiveBandwidth(
+    const int video_channel,
+    unsigned int* estimated_bandwidth) const {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Could not get channel %d", __FUNCTION__,
+                 video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  vie_channel->GetEstimatedReceiveBandwidth(
+      static_cast<uint32_t*>(estimated_bandwidth));
+  return 0;
+}
+
+int ViERTP_RTCPImpl::StartRTPDump(const int video_channel,
+                                  const char file_nameUTF8[1024],
+                                  RTPDirections direction) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, file_name: %s, direction: %d)", __FUNCTION__,
+               video_channel, file_nameUTF8, direction);
+  assert(FileWrapper::kMaxFileNameSize == 1024);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->StartRTPDump(file_nameUTF8, direction) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::StopRTPDump(const int video_channel,
+                                 RTPDirections direction) {
+  WEBRTC_TRACE(kTraceApiCall, kTraceVideo,
+               ViEId(shared_data_->instance_id(), video_channel),
+               "%s(channel: %d, direction: %d)", __FUNCTION__, video_channel,
+               direction);
+  ViEChannelManagerScoped cs(*(shared_data_->channel_manager()));
+  ViEChannel* vie_channel = cs.Channel(video_channel);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->StopRTPDump(direction) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpUnknownError);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::RegisterRTPObserver(const int video_channel,
+                                         ViERTPObserver& observer) {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->RegisterRtpObserver(&observer) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpObserverAlreadyRegistered);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::DeregisterRTPObserver(const int video_channel) {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->RegisterRtpObserver(NULL) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpObserverNotRegistered);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::RegisterRTCPObserver(const int video_channel,
+                                          ViERTCPObserver& observer) {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->RegisterRtcpObserver(&observer) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpObserverAlreadyRegistered);
+    return -1;
+  }
+  return 0;
+}
+
+int ViERTP_RTCPImpl::DeregisterRTCPObserver(const int video_channel) {
+  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);
+  if (!vie_channel) {
+    WEBRTC_TRACE(kTraceError, kTraceVideo,
+                 ViEId(shared_data_->instance_id(), video_channel),
+                 "%s: Channel %d doesn't exist", __FUNCTION__, video_channel);
+    shared_data_->SetLastError(kViERtpRtcpInvalidChannelId);
+    return -1;
+  }
+  if (vie_channel->RegisterRtcpObserver(NULL) != 0) {
+    shared_data_->SetLastError(kViERtpRtcpObserverNotRegistered);
+    return -1;
+  }
+  return 0;
+}
+
+}  // namespace webrtc