1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/libwebrtc/video/frame_decode_scheduler.h b/third_party/libwebrtc/video/frame_decode_scheduler.h
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+++ b/third_party/libwebrtc/video/frame_decode_scheduler.h
@@ -0,0 +1,52 @@
+/*
+ *  Copyright (c) 2022 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef VIDEO_FRAME_DECODE_SCHEDULER_H_
+#define VIDEO_FRAME_DECODE_SCHEDULER_H_
+
+#include <stdint.h>
+
+#include "absl/functional/any_invocable.h"
+#include "absl/types/optional.h"
+#include "api/units/timestamp.h"
+#include "video/frame_decode_timing.h"
+
+namespace webrtc {
+
+class FrameDecodeScheduler {
+ public:
+  // Invoked when a frame with `rtp_timestamp` is ready for decoding.
+  using FrameReleaseCallback =
+      absl::AnyInvocable<void(uint32_t rtp_timestamp,
+                              Timestamp render_time) &&>;
+
+  virtual ~FrameDecodeScheduler() = default;
+
+  // Returns the rtp timestamp of the next frame scheduled for release, or
+  // `nullopt` if no frame is currently scheduled.
+  virtual absl::optional<uint32_t> ScheduledRtpTimestamp() = 0;
+
+  // Schedules a frame for release based on `schedule`. When released,
+  // `callback` will be invoked with the `rtp` timestamp of the frame and the
+  // `render_time`
+  virtual void ScheduleFrame(uint32_t rtp,
+                             FrameDecodeTiming::FrameSchedule schedule,
+                             FrameReleaseCallback callback) = 0;
+
+  // Cancels all scheduled frames.
+  virtual void CancelOutstanding() = 0;
+
+  // Stop() Must be called before destruction.
+  virtual void Stop() = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // VIDEO_FRAME_DECODE_SCHEDULER_H_