| /* |
| * 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. |
| */ |
| |
| #include "modules/video_coding/timing/decode_time_percentile_filter.h" |
| |
| #include <cstdint> |
| |
| namespace webrtc { |
| |
| namespace { |
| |
| // The first kIgnoredSampleCount samples will be ignored. |
| const int kIgnoredSampleCount = 5; |
| // Return the `kPercentile` value in RequiredDecodeTimeMs(). |
| const float kPercentile = 0.95f; |
| // The window size in ms. |
| const int64_t kTimeLimitMs = 10000; |
| |
| } // anonymous namespace |
| |
| DecodeTimePercentileFilter::DecodeTimePercentileFilter() |
| : ignored_sample_count_(0), filter_(kPercentile) {} |
| DecodeTimePercentileFilter::~DecodeTimePercentileFilter() = default; |
| |
| void DecodeTimePercentileFilter::AddTiming(int64_t decode_time_ms, |
| int64_t now_ms) { |
| // Ignore the first `kIgnoredSampleCount` samples. |
| if (ignored_sample_count_ < kIgnoredSampleCount) { |
| ++ignored_sample_count_; |
| return; |
| } |
| |
| // Insert new decode time value. |
| filter_.Insert(decode_time_ms); |
| history_.emplace(decode_time_ms, now_ms); |
| |
| // Pop old decode time values. |
| while (!history_.empty() && |
| now_ms - history_.front().sample_time_ms > kTimeLimitMs) { |
| filter_.Erase(history_.front().decode_time_ms); |
| history_.pop(); |
| } |
| } |
| |
| // Get the 95th percentile observed decode time within a time window. |
| int64_t DecodeTimePercentileFilter::RequiredDecodeTimeMs() const { |
| return filter_.GetPercentileValue(); |
| } |
| |
| DecodeTimePercentileFilter::Sample::Sample(int64_t decode_time_ms, |
| int64_t sample_time_ms) |
| : decode_time_ms(decode_time_ms), sample_time_ms(sample_time_ms) {} |
| |
| } // namespace webrtc |