summaryrefslogtreecommitdiffstats
path: root/dom/media/webrtc/sdp/HybridSdpParser.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--dom/media/webrtc/sdp/HybridSdpParser.cpp88
1 files changed, 88 insertions, 0 deletions
diff --git a/dom/media/webrtc/sdp/HybridSdpParser.cpp b/dom/media/webrtc/sdp/HybridSdpParser.cpp
new file mode 100644
index 0000000000..d1f2d5c058
--- /dev/null
+++ b/dom/media/webrtc/sdp/HybridSdpParser.cpp
@@ -0,0 +1,88 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "sdp/HybridSdpParser.h"
+#include "sdp/SdpLog.h"
+#include "sdp/SdpPref.h"
+#include "sdp/SdpTelemetry.h"
+#include "sdp/SipccSdpParser.h"
+#include "sdp/RsdparsaSdpParser.h"
+#include "sdp/ParsingResultComparer.h"
+
+#include "mozilla/Logging.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Telemetry.h"
+
+#include <unordered_map>
+
+namespace mozilla {
+
+using mozilla::LogLevel;
+
+const std::string& HybridSdpParser::ParserName() {
+ const static std::string PARSER_NAME = "hybrid";
+ return PARSER_NAME;
+}
+
+HybridSdpParser::HybridSdpParser()
+ : mStrictSuccess(SdpPref::StrictSuccess()),
+ mPrimary(SdpPref::Primary()),
+ mSecondary(SdpPref::Secondary()),
+ mFailover(SdpPref::Failover()) {
+ MOZ_ASSERT(!(mSecondary && mFailover),
+ "Can not have both a secondary and failover parser!");
+ MOZ_LOG(SdpLog, LogLevel::Info,
+ ("Primary SDP Parser: %s", mPrimary->Name().c_str()));
+ mSecondary.apply([](auto& parser) {
+ MOZ_LOG(SdpLog, LogLevel::Info,
+ ("Secondary SDP Logger: %s", parser->Name().c_str()));
+ });
+ mFailover.apply([](auto& parser) {
+ MOZ_LOG(SdpLog, LogLevel::Info,
+ ("Failover SDP Logger: %s", parser->Name().c_str()));
+ });
+}
+
+auto HybridSdpParser::Parse(const std::string& aText)
+ -> UniquePtr<SdpParser::Results> {
+ using Results = UniquePtr<SdpParser::Results>;
+ using Role = SdpTelemetry::Roles;
+ using Mode = SdpPref::AlternateParseModes;
+
+ Mode mode = Mode::Never;
+ auto results = mPrimary->Parse(aText);
+
+ auto successful = [&](Results& aRes) -> bool {
+ // In strict mode any reported error counts as failure
+ if (mStrictSuccess) {
+ return aRes->Ok();
+ }
+ return aRes->Sdp() != nullptr;
+ };
+ // Pass results on for comparison and return A if it was a success and B
+ // otherwise.
+ auto compare = [&](Results&& aResB) -> Results {
+ SdpTelemetry::RecordParse(aResB, mode, Role::Secondary);
+ ParsingResultComparer::Compare(results, aResB, aText, mode);
+ return std::move(successful(results) ? results : aResB);
+ };
+ // Run secondary parser, if there is one, and update selected results.
+ mSecondary.apply([&](auto& sec) {
+ mode = Mode::Parallel;
+ results = compare(std::move(sec->Parse(aText)));
+ });
+ // Run failover parser, if there is one, and update selected results.
+ mFailover.apply([&](auto& failover) { // Only run if primary parser failed
+ mode = Mode::Failover;
+ if (!successful(results)) {
+ results = compare(std::move(failover->Parse(aText)));
+ }
+ });
+
+ SdpTelemetry::RecordParse(results, mode, Role::Primary);
+ return results;
+}
+
+} // namespace mozilla