tree 10c22ce5d44b74178b75adcd08ba29c1ac86b4c9
parent 352f38c7a8590e94115a90401b6538be04271e0c
author Philipp Hancke <phancke@microsoft.com> 1670266750 +0100
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> 1670436239 +0000

sdp: ignore duplicate stream ids in msid parsing

https://www.rfc-editor.org/rfc/rfc8830.html#section-3.2.2
says
  Check if a MediaStream with the same WebIDL "id"
  attribute already exists. If not, create it.

Ignoring duplicates here satisfies this and brings the behavior
closer to Firefox:
  https://github.com/w3c/webrtc-pc/issues/2803

Also make tests use a std::string for the sdp input string.

BUG=webrtc:14745

Change-Id: Iccaabc08d865b779416f6ba4d2dfd5cff04133f0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/286422
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38840}