Introduce struct MediaConfig, with construction-time settings.

webrtc/media/engine/webrtcvideoengine2.cc

 /*
  *  Copyright (c) 2014 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.
  */
 
@@ skipping 491 matching lines @@
   LOG(LS_INFO) << "WebRtcVideoEngine2::~WebRtcVideoEngine2";
 }
 
 void WebRtcVideoEngine2::Init() {
   LOG(LS_INFO) << "WebRtcVideoEngine2::Init";
   initialized_ = true;
 }
 
 WebRtcVideoChannel2* WebRtcVideoEngine2::CreateChannel(
     webrtc::Call* call,
+    const MediaConfig& config,
     const VideoOptions& options) {
   RTC_DCHECK(initialized_);
   LOG(LS_INFO) << "CreateChannel. Options: " << options.ToString();
-  return new WebRtcVideoChannel2(call, options, video_codecs_,
-      external_encoder_factory_, external_decoder_factory_);
+  return new WebRtcVideoChannel2(call, config, options, video_codecs_,
+                                 external_encoder_factory_,
+                                 external_decoder_factory_);
 }
 
 const std::vector<VideoCodec>& WebRtcVideoEngine2::codecs() const {
   return video_codecs_;
 }
 
 RtpCapabilities WebRtcVideoEngine2::GetCapabilities() const {
   RtpCapabilities capabilities;
   capabilities.header_extensions.push_back(
       RtpHeaderExtension(kRtpTimestampOffsetHeaderExtension,
@@ skipping 68 matching lines @@
                      0);
 
     AddDefaultFeedbackParams(&codec);
     supported_codecs.push_back(codec);
   }
   return supported_codecs;
 }
 
 WebRtcVideoChannel2::WebRtcVideoChannel2(
     webrtc::Call* call,
+    const MediaConfig& config,
     const VideoOptions& options,
     const std::vector<VideoCodec>& recv_codecs,
     WebRtcVideoEncoderFactory* external_encoder_factory,
     WebRtcVideoDecoderFactory* external_decoder_factory)
-    : call_(call),
+    : VideoMediaChannel(config),
+      call_(call),
       unsignalled_ssrc_handler_(&default_unsignalled_ssrc_handler_),
+      signal_cpu_adaptation_(config.enable_cpu_overuse_detection),
+      disable_prerenderer_smoothing_(config.disable_prerenderer_smoothing),
       external_encoder_factory_(external_encoder_factory),
       external_decoder_factory_(external_decoder_factory) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
-  SetDefaultOptions();
   options_.SetAll(options);
-  if (options_.cpu_overuse_detection)
-    signal_cpu_adaptation_ = *options_.cpu_overuse_detection;
   rtcp_receiver_report_ssrc_ = kDefaultRtcpReceiverReportSsrc;
   sending_ = false;
   default_send_ssrc_ = 0;
   RTC_DCHECK(ValidateCodecFormats(recv_codecs));
   recv_codecs_ = FilterSupportedCodecs(MapCodecs(recv_codecs));
 }
 
-void WebRtcVideoChannel2::SetDefaultOptions() {
-  options_.cpu_overuse_detection = rtc::Optional<bool>(true);
-  options_.dscp = rtc::Optional<bool>(false);
-  options_.suspend_below_min_bitrate = rtc::Optional<bool>(false);
-  options_.screencast_min_bitrate_kbps = rtc::Optional<int>(0);
-}
-
 WebRtcVideoChannel2::~WebRtcVideoChannel2() {
   for (auto& kv : send_streams_)
     delete kv.second;
   for (auto& kv : receive_streams_)
     delete kv.second;
 }
 
 bool WebRtcVideoChannel2::CodecIsExternallySupported(
     const std::string& name) const {
   if (external_encoder_factory_ == NULL) {
@@ skipping 108 matching lines @@
   // Handle RTCP mode.
   if (params.rtcp.reduced_size != send_params_.rtcp.reduced_size) {
     changed_params->rtcp_mode = rtc::Optional<webrtc::RtcpMode>(
         params.rtcp.reduced_size ? webrtc::RtcpMode::kReducedSize
                                  : webrtc::RtcpMode::kCompound);
   }
 
   return true;
 }
 
+rtc::DiffServCodePoint WebRtcVideoChannel2::PreferredDscp() const {
+  return rtc::DSCP_AF41;
+}
+
 bool WebRtcVideoChannel2::SetSendParameters(const VideoSendParameters& params) {
   TRACE_EVENT0("webrtc", "WebRtcVideoChannel2::SetSendParameters");
   LOG(LS_INFO) << "SetSendParameters: " << params.ToString();
   ChangedSendParameters changed_params;
   if (!GetChangedSendParameters(params, &changed_params)) {
     return false;
   }
 
   bool bitrate_config_changed = false;
 
@@ skipping 24 matching lines @@
         bitrate_config_.min_bitrate_bps > max_bitrate_bps) {
       bitrate_config_.min_bitrate_bps = max_bitrate_bps;
     }
     bitrate_config_changed = true;
   }
 
   if (bitrate_config_changed) {
     call_->SetBitrateConfig(bitrate_config_);
   }
 
-  if (changed_params.options) {
+  if (changed_params.options)
     options_.SetAll(*changed_params.options);
-    {
-      rtc::CritScope lock(&capturer_crit_);
-      if (options_.cpu_overuse_detection) {
-        signal_cpu_adaptation_ = *options_.cpu_overuse_detection;
-      }
-    }
-    rtc::DiffServCodePoint dscp =
-        options_.dscp.value_or(false) ? rtc::DSCP_AF41 : rtc::DSCP_DEFAULT;
-    MediaChannel::SetDscp(dscp);
-  }
 
   {
     rtc::CritScope stream_lock(&stream_crit_);
     for (auto& kv : send_streams_) {
       kv.second->SetSendParameters(changed_params);
     }
     if (changed_params.codec) {
       // Update receive feedback parameters from new codec.
       LOG(LS_INFO)
           << "SetFeedbackOptions on all the receive streams because the send "
@@ skipping 305 matching lines @@
 
   // Set up A/V sync group based on sync label.
   config.sync_group = sp.sync_label;
 
   config.rtp.remb = send_codec_ ? HasRemb(send_codec_->codec) : false;
   config.rtp.transport_cc =
       send_codec_ ? HasTransportCc(send_codec_->codec) : false;
 
   receive_streams_[ssrc] = new WebRtcVideoReceiveStream(
       call_, sp, config, external_decoder_factory_, default_stream,
-      recv_codecs_, options_.disable_prerenderer_smoothing.value_or(false));
+      recv_codecs_, disable_prerenderer_smoothing_);
 
   return true;
 }
 
 void WebRtcVideoChannel2::ConfigureReceiverRtp(
     webrtc::VideoReceiveStream::Config* config,
     const StreamParams& sp) const {
   uint32_t ssrc = sp.first_ssrc();
 
   config->rtp.remote_ssrc = ssrc;
@@ skipping 608 matching lines @@
                          "payload type. Ignoring.";
       parameters_.config.rtp.rtx.ssrcs.clear();
     } else {
       parameters_.config.rtp.rtx.payload_type = codec_settings.rtx_payload_type;
     }
   }
 
   parameters_.config.rtp.nack.rtp_history_ms =
       HasNack(codec_settings.codec) ? kNackHistoryMs : 0;
 
-  RTC_CHECK(options.suspend_below_min_bitrate);
   parameters_.config.suspend_below_min_bitrate =
-      *options.suspend_below_min_bitrate;
+      options.suspend_below_min_bitrate.value_or(false);
 
   parameters_.codec_settings =
       rtc::Optional<WebRtcVideoChannel2::VideoCodecSettings>(codec_settings);
   parameters_.options = options;
 
   LOG(LS_INFO)
       << "RecreateWebRtcStream (send) because of SetCodecAndOptions; options="
       << options.ToString();
   RecreateWebRtcStream();
   if (allocated_encoder_.encoder != new_encoder.encoder) {
@@ skipping 45 matching lines @@
     RecreateWebRtcStream();
   }
 }
 
 webrtc::VideoEncoderConfig
 WebRtcVideoChannel2::WebRtcVideoSendStream::CreateVideoEncoderConfig(
     const Dimensions& dimensions,
     const VideoCodec& codec) const {
   webrtc::VideoEncoderConfig encoder_config;
   if (dimensions.is_screencast) {
-    RTC_CHECK(parameters_.options.screencast_min_bitrate_kbps);
     encoder_config.min_transmit_bitrate_bps =
-        *parameters_.options.screencast_min_bitrate_kbps * 1000;
+        1000 * parameters_.options.screencast_min_bitrate_kbps.value_or(0);
     encoder_config.content_type =
         webrtc::VideoEncoderConfig::ContentType::kScreen;
   } else {
     encoder_config.min_transmit_bitrate_bps = 0;
     encoder_config.content_type =
         webrtc::VideoEncoderConfig::ContentType::kRealtimeVideo;
   }
 
   // Restrict dimensions according to codec max.
   int width = dimensions.width;
@@ skipping 652 matching lines @@
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VIDEO