Move rtp-specific config out of EncoderSettings.

In VideoSendStream::Config, move payload_name and payload_type from
EncoderSettings to Rtp.

EncoderSettings now contains configuration for VideoStreamEncoder only,
and should perhaps be renamed in a follow up cl. It's no longer
passed as an argument to VideoCodecInitializer::SetupCodec.

The latter then needs a different way to know the codec type,
which is provided by a new codec_type member in VideoEncoderConfig.

Bug: webrtc:8830
Change-Id: Ifcc691aef1ee6a95e43c0452c5e630d92a511cd6
Reviewed-on: https://webrtc-review.googlesource.com/62062
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22532}
diff --git a/modules/video_coding/video_codec_initializer.cc b/modules/video_coding/video_codec_initializer.cc
index e473a16..892113b 100644
--- a/modules/video_coding/video_codec_initializer.cc
+++ b/modules/video_coding/video_codec_initializer.cc
@@ -26,18 +26,15 @@
 
 bool VideoCodecInitializer::SetupCodec(
     const VideoEncoderConfig& config,
-    const VideoSendStream::Config::EncoderSettings settings,
     const std::vector<VideoStream>& streams,
     bool nack_enabled,
     VideoCodec* codec,
     std::unique_ptr<VideoBitrateAllocator>* bitrate_allocator) {
-  if (PayloadStringToCodecType(settings.payload_name) == kVideoCodecMultiplex) {
-    VideoSendStream::Config::EncoderSettings associated_codec_settings =
-        settings;
-    associated_codec_settings.payload_name =
-        CodecTypeToPayloadString(kVideoCodecVP9);
-    if (!SetupCodec(config, associated_codec_settings, streams, nack_enabled,
-                    codec, bitrate_allocator)) {
+  if (config.codec_type == kVideoCodecMultiplex) {
+    VideoEncoderConfig associated_config = config.Copy();
+    associated_config.codec_type = kVideoCodecVP9;
+    if (!SetupCodec(associated_config, streams, nack_enabled, codec,
+                    bitrate_allocator)) {
       RTC_LOG(LS_ERROR) << "Failed to create stereo encoder configuration.";
       return false;
     }
@@ -46,8 +43,7 @@
   }
 
   *codec =
-      VideoEncoderConfigToVideoCodec(config, streams, settings.payload_name,
-                                     settings.payload_type, nack_enabled);
+      VideoEncoderConfigToVideoCodec(config, streams, nack_enabled);
   *bitrate_allocator = CreateBitrateAllocator(*codec);
 
   return true;
@@ -73,8 +69,6 @@
 VideoCodec VideoCodecInitializer::VideoEncoderConfigToVideoCodec(
     const VideoEncoderConfig& config,
     const std::vector<VideoStream>& streams,
-    const std::string& payload_name,
-    int payload_type,
     bool nack_enabled) {
   static const int kEncoderMinBitrateKbps = 30;
   RTC_DCHECK(!streams.empty());
@@ -82,7 +76,7 @@
 
   VideoCodec video_codec;
   memset(&video_codec, 0, sizeof(video_codec));
-  video_codec.codecType = PayloadStringToCodecType(payload_name);
+  video_codec.codecType = config.codec_type;
 
   switch (config.content_type) {
     case VideoEncoderConfig::ContentType::kRealtimeVideo:
@@ -155,7 +149,9 @@
       break;
   }
 
-  video_codec.plType = payload_type;
+  // TODO(nisse): The plType field should be deleted. Luckily, our
+  // callers don't need it.
+  video_codec.plType = 0;
   video_codec.numberOfSimulcastStreams =
       static_cast<unsigned char>(streams.size());
   video_codec.minBitrate = streams[0].min_bitrate_bps / 1000;