Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/video_coding/timing/decode_time_percentile_filter.h b/third_party/libwebrtc/modules/video_coding/timing/decode_time_percentile_filter.h
new file mode 100644
index 0000000000..9a6aa5e6a4
--- /dev/null
+++ b/third_party/libwebrtc/modules/video_coding/timing/decode_time_percentile_filter.h
@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2011 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 MODULES_VIDEO_CODING_TIMING_DECODE_TIME_PERCENTILE_FILTER_H_
+#define MODULES_VIDEO_CODING_TIMING_DECODE_TIME_PERCENTILE_FILTER_H_
+
+#include <queue>
+
+#include "rtc_base/numerics/percentile_filter.h"
+
+namespace webrtc {
+
+// The `DecodeTimePercentileFilter` filters the actual per-frame decode times
+// and provides an estimate for the 95th percentile of those decode times. This
+// estimate can be used to determine how large the "decode delay term" should be
+// when determining the render timestamp for a frame.
+class DecodeTimePercentileFilter {
+ public:
+  DecodeTimePercentileFilter();
+  ~DecodeTimePercentileFilter();
+
+  // Add a new decode time to the filter.
+  void AddTiming(int64_t new_decode_time_ms, int64_t now_ms);
+
+  // Get the required decode time in ms. It is the 95th percentile observed
+  // decode time within a time window.
+  int64_t RequiredDecodeTimeMs() const;
+
+ private:
+  struct Sample {
+    Sample(int64_t decode_time_ms, int64_t sample_time_ms);
+    int64_t decode_time_ms;
+    int64_t sample_time_ms;
+  };
+
+  // The number of samples ignored so far.
+  int ignored_sample_count_;
+  // Queue with history of latest decode time values.
+  std::queue<Sample> history_;
+  // `filter_` contains the same values as `history_`, but in a data structure
+  // that allows efficient retrieval of the percentile value.
+  PercentileFilter<int64_t> filter_;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_VIDEO_CODING_TIMING_DECODE_TIME_PERCENTILE_FILTER_H_