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4529fbcfab
Also renaming it Vp8TemporalLayers to show that it is codec specific. Bug: webrtc:9012 Change-Id: I18187538b8142cdd7538f1a4ed1bada09d040f1f Reviewed-on: https://webrtc-review.googlesource.com/c/104643 Commit-Queue: Erik Språng <sprang@webrtc.org> Reviewed-by: Per Kjellander <perkj@webrtc.org> Reviewed-by: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25137}
131 lines
4 KiB
C++
131 lines
4 KiB
C++
/* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
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#define MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
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#include <map>
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#include <memory>
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#include <vector>
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#include "api/video_codecs/vp8_temporal_layers.h"
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#include "modules/video_coding/codecs/vp8/include/temporal_layers_checker.h"
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#include "modules/video_coding/utility/frame_dropper.h"
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#include "rtc_base/rate_statistics.h"
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#include "rtc_base/timeutils.h"
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namespace webrtc {
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struct CodecSpecificInfoVP8;
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class Clock;
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class ScreenshareLayers : public Vp8TemporalLayers {
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public:
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static const double kMaxTL0FpsReduction;
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static const double kAcceptableTargetOvershoot;
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static const int kMaxFrameIntervalMs;
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ScreenshareLayers(int num_temporal_layers,
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Clock* clock);
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~ScreenshareLayers() override;
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bool SupportsEncoderFrameDropping() const override;
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// Returns the recommended VP8 encode flags needed. May refresh the decoder
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// and/or update the reference buffers.
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Vp8TemporalLayers::FrameConfig UpdateLayerConfig(
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uint32_t rtp_timestamp) override;
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// New target bitrate, per temporal layer.
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void OnRatesUpdated(const std::vector<uint32_t>& bitrates_bps,
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int framerate_fps) override;
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// Update the encoder configuration with target bitrates or other parameters.
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// Returns true iff the configuration was actually modified.
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bool UpdateConfiguration(Vp8EncoderConfig* cfg) override;
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void OnEncodeDone(uint32_t rtp_timestamp,
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size_t size_bytes,
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bool is_keyframe,
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int qp,
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CodecSpecificInfoVP8* vp8_info) override;
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private:
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enum class TemporalLayerState : int { kDrop, kTl0, kTl1, kTl1Sync };
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bool TimeToSync(int64_t timestamp) const;
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uint32_t GetCodecTargetBitrateKbps() const;
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Clock* const clock_;
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int number_of_temporal_layers_;
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int active_layer_;
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int64_t last_timestamp_;
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int64_t last_sync_timestamp_;
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int64_t last_emitted_tl0_timestamp_;
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int64_t last_frame_time_ms_;
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rtc::TimestampWrapAroundHandler time_wrap_handler_;
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int min_qp_;
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int max_qp_;
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uint32_t max_debt_bytes_;
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std::map<uint32_t, Vp8TemporalLayers::FrameConfig> pending_frame_configs_;
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// Configured max framerate.
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absl::optional<uint32_t> target_framerate_;
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// Incoming framerate from capturer.
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absl::optional<uint32_t> capture_framerate_;
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// Tracks what framerate we actually encode, and drops frames on overshoot.
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RateStatistics encode_framerate_;
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bool bitrate_updated_;
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static constexpr int kMaxNumTemporalLayers = 2;
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struct TemporalLayer {
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TemporalLayer()
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: state(State::kNormal),
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enhanced_max_qp(-1),
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last_qp(-1),
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debt_bytes_(0),
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target_rate_kbps_(0) {}
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enum class State {
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kNormal,
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kDropped,
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kReencoded,
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kQualityBoost,
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kKeyFrame
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} state;
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int enhanced_max_qp;
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int last_qp;
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uint32_t debt_bytes_;
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uint32_t target_rate_kbps_;
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void UpdateDebt(int64_t delta_ms);
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} layers_[kMaxNumTemporalLayers];
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void UpdateHistograms();
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// Data for histogram statistics.
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struct Stats {
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int64_t first_frame_time_ms_ = -1;
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int64_t num_tl0_frames_ = 0;
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int64_t num_tl1_frames_ = 0;
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int64_t num_dropped_frames_ = 0;
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int64_t num_overshoots_ = 0;
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int64_t tl0_qp_sum_ = 0;
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int64_t tl1_qp_sum_ = 0;
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int64_t tl0_target_bitrate_sum_ = 0;
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int64_t tl1_target_bitrate_sum_ = 0;
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} stats_;
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// Optional utility used to verify reference validity.
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std::unique_ptr<TemporalLayersChecker> checker_;
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
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