vp8_temporal_layers.h

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/*

 *  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 API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_

#define API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_

#include <cstddef>

#include <cstdint>

#include <memory>

#include <vector>

#include "api/fec_controller_override.h"

#include "api/video_codecs/video_encoder.h"

#include "api/video_codecs/vp8_frame_buffer_controller.h"

#include "api/video_codecs/vp8_frame_config.h"

namespace webrtc {

// Two different flavors of temporal layers are currently available:

// kFixedPattern uses a fixed repeating pattern of 1-4 layers.

// kBitrateDynamic can allocate frames dynamically to 1 or 2 layers, based on

// the bitrate produced.

// TODO(eladalon): Remove this enum.

enum class Vp8TemporalLayersType { kFixedPattern, kBitrateDynamic };

// This interface defines a way of getting the encoder settings needed to

// realize a temporal layer structure.

class Vp8TemporalLayers final : public Vp8FrameBufferController {

 public:

  Vp8TemporalLayers(

      std::vector<std::unique_ptr<Vp8FrameBufferController>>&& controllers,

      FecControllerOverride* fec_controller_override);

  ~Vp8TemporalLayers() override = default;

  void SetQpLimits(size_t stream_index, int min_qp, int max_qp) override;

  size_t StreamCount() const override;

  bool SupportsEncoderFrameDropping(size_t stream_index) const override;

  void OnRatesUpdated(size_t stream_index,

                      const std::vector<uint32_t>& bitrates_bps,

                      int framerate_fps) override;

  Vp8EncoderConfig UpdateConfiguration(size_t stream_index) override;

  Vp8FrameConfig NextFrameConfig(size_t stream_index,

                                 uint32_t rtp_timestamp) override;

  void OnEncodeDone(size_t stream_index,

                    uint32_t rtp_timestamp,

                    size_t size_bytes,

                    bool is_keyframe,

                    int qp,

                    CodecSpecificInfo* info) override;

  void OnFrameDropped(size_t stream_index, uint32_t rtp_timestamp) override;

  void OnPacketLossRateUpdate(float packet_loss_rate) override;

  void OnRttUpdate(int64_t rtt_ms) override;

  void OnLossNotification(

      const VideoEncoder::LossNotification& loss_notification) override;

 private:

  std::vector<std::unique_ptr<Vp8FrameBufferController>> controllers_;

};

}  // namespace webrtc

#endif  // API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_