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/*
* Copyright (c) 2020 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_SVC_SCALABILITY_STRUCTURE_L2T2_KEY_SHIFT_H_
#define MODULES_VIDEO_CODING_SVC_SCALABILITY_STRUCTURE_L2T2_KEY_SHIFT_H_
#include <vector>
#include "api/transport/rtp/dependency_descriptor.h"
#include "api/video/video_bitrate_allocation.h"
#include "common_video/generic_frame_descriptor/generic_frame_info.h"
#include "modules/video_coding/svc/scalable_video_controller.h"
namespace webrtc {
// S1T1 0 0
// / / /
// S1T0 0---0---0
// | ...
// S0T1 | 0 0
// | / /
// S0T0 0-0---0--
// Time-> 0 1 2 3 4
class ScalabilityStructureL2T2KeyShift : public ScalableVideoController {
public:
~ScalabilityStructureL2T2KeyShift() override;
StreamLayersConfig StreamConfig() const override;
FrameDependencyStructure DependencyStructure() const override;
std::vector<LayerFrameConfig> NextFrameConfig(bool restart) override;
GenericFrameInfo OnEncodeDone(const LayerFrameConfig& config) override;
void OnRatesUpdated(const VideoBitrateAllocation& bitrates) override;
private:
enum FramePattern {
kKey,
kDelta0,
kDelta1,
};
static constexpr int kNumSpatialLayers = 2;
static constexpr int kNumTemporalLayers = 2;
bool DecodeTargetIsActive(int sid, int tid) const {
return active_decode_targets_[sid * kNumTemporalLayers + tid];
}
void SetDecodeTargetIsActive(int sid, int tid, bool value) {
active_decode_targets_.set(sid * kNumTemporalLayers + tid, value);
}
FramePattern next_pattern_ = kKey;
std::bitset<32> active_decode_targets_ = 0b1111;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_SVC_SCALABILITY_STRUCTURE_L2T2_KEY_SHIFT_H_