Introduce MediaTransportConfig

Currently we pass media_transport from PeerConnection to media layers. The goal of this change is to replace media_transport with struct MediaTransportCondif, which will enable adding different transports (i.e. we plan to add DatagramTransport) as well as other media-transport related settings without changing 100s of files.

TODO: In the future we should consider also adding rtp_transport in the same config, but it will require a bit more work, so I did not include it in the same change.


Bug: webrtc:9719
Change-Id: Ie31e1faa3ed9e6beefe30a3da208130509ce00cd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/137181
Commit-Queue: Anton Sukhanov <sukhanov@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Bjorn Mellem <mellem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28016}
diff --git a/call/video_receive_stream.h b/call/video_receive_stream.h
index affc256..a1fa86d 100644
--- a/call/video_receive_stream.h
+++ b/call/video_receive_stream.h
@@ -18,6 +18,7 @@
 
 #include "api/call/transport.h"
 #include "api/crypto/crypto_options.h"
+#include "api/media_transport_config.h"
 #include "api/media_transport_interface.h"
 #include "api/rtp_headers.h"
 #include "api/rtp_parameters.h"
@@ -121,7 +122,7 @@
     Config() = delete;
     Config(Config&&);
     Config(Transport* rtcp_send_transport,
-           MediaTransportInterface* media_transport);
+           MediaTransportConfig media_transport_config);
     explicit Config(Transport* rtcp_send_transport);
     Config& operator=(Config&&);
     Config& operator=(const Config&) = delete;
@@ -132,6 +133,10 @@
 
     std::string ToString() const;
 
+    MediaTransportInterface* media_transport() const {
+      return media_transport_config.media_transport;
+    }
+
     // Decoders for every payload that we can receive.
     std::vector<Decoder> decoders;
 
@@ -197,7 +202,7 @@
     // Transport for outgoing packets (RTCP).
     Transport* rtcp_send_transport = nullptr;
 
-    MediaTransportInterface* media_transport = nullptr;
+    MediaTransportConfig media_transport_config;
 
     // Must always be set.
     rtc::VideoSinkInterface<VideoFrame>* renderer = nullptr;