1 files changed, 50 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/modules/peerconnection/rtc_encoded_audio_underlying_source.h b/chromium/third_party/blink/renderer/modules/peerconnection/rtc_encoded_audio_underlying_source.h
new file mode 100644
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+++ b/chromium/third_party/blink/renderer/modules/peerconnection/rtc_encoded_audio_underlying_source.h
@@ -0,0 +1,50 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_AUDIO_UNDERLYING_SOURCE_H_
+#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_AUDIO_UNDERLYING_SOURCE_H_
+
+#include "base/threading/thread_checker.h"
+#include "third_party/blink/renderer/core/streams/underlying_source_base.h"
+#include "third_party/blink/renderer/modules/modules_export.h"
+
+namespace webrtc {
+class TransformableFrameInterface;
+}  // namespace webrtc
+
+namespace blink {
+
+class MODULES_EXPORT RTCEncodedAudioUnderlyingSource
+    : public UnderlyingSourceBase {
+ public:
+  explicit RTCEncodedAudioUnderlyingSource(
+      ScriptState*,
+      base::OnceClosure disconnect_callback,
+      bool is_receiver);
+
+  // UnderlyingSourceBase
+  ScriptPromise pull(ScriptState*) override;
+  ScriptPromise Cancel(ScriptState*, ScriptValue reason) override;
+
+  void OnFrameFromSource(std::unique_ptr<webrtc::TransformableFrameInterface>);
+  void Close();
+
+  void Trace(Visitor*) override;
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(RTCEncodedAudioUnderlyingSourceTest,
+                           QueuedFramesAreDroppedWhenOverflow);
+  static const int kMinQueueDesiredSize;
+
+  const Member<ScriptState> script_state_;
+  base::OnceClosure disconnect_callback_;
+  // Indicates if this source is for a receiver. Receiver sources
+  // expose CSRCs.
+  const bool is_receiver_;
+  THREAD_CHECKER(thread_checker_);
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_AUDIO_UNDERLYING_SOURCE_H_