Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 49 insertions, 0 deletions

diff --git a/third_party/libwebrtc/logging/rtc_event_log/encoder/delta_encoding.h b/third_party/libwebrtc/logging/rtc_event_log/encoder/delta_encoding.h
new file mode 100644
index 0000000000..779cdc6b2f
--- /dev/null
+++ b/third_party/libwebrtc/logging/rtc_event_log/encoder/delta_encoding.h
@@ -0,0 +1,49 @@
+/*
+ *  Copyright (c) 2018 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 LOGGING_RTC_EVENT_LOG_ENCODER_DELTA_ENCODING_H_
+#define LOGGING_RTC_EVENT_LOG_ENCODER_DELTA_ENCODING_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+
+namespace webrtc {
+
+// Encode `values` as a sequence of deltas following on `base` and return it.
+// If all of the values were equal to the base, an empty string will be
+// returned; this is a valid encoding of that edge case.
+// `base` is not guaranteed to be written into `output`, and must therefore
+// be provided separately to the decoder.
+// This function never fails.
+// TODO(eladalon): Split into optional and non-optional variants (efficiency).
+std::string EncodeDeltas(absl::optional<uint64_t> base,
+                         const std::vector<absl::optional<uint64_t>>& values);
+
+// EncodeDeltas() and DecodeDeltas() are inverse operations;
+// invoking DecodeDeltas() over the output of EncodeDeltas(), will return
+// the input originally given to EncodeDeltas().
+// `num_of_deltas` must be greater than zero. If input is not a valid encoding
+// of `num_of_deltas` elements based on `base`, the function returns an empty
+// vector, which signals an error.
+// TODO(eladalon): Split into optional and non-optional variants (efficiency).
+std::vector<absl::optional<uint64_t>> DecodeDeltas(
+    absl::string_view input,
+    absl::optional<uint64_t> base,
+    size_t num_of_deltas);
+
+}  // namespace webrtc
+
+#endif  // LOGGING_RTC_EVENT_LOG_ENCODER_DELTA_ENCODING_H_