simulcast_to_svc_converter.h

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/* Copyright (c) 2024 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_SIMULCAST_TO_SVC_CONVERTER_H_

#define MODULES_VIDEO_CODING_SVC_SIMULCAST_TO_SVC_CONVERTER_H_

#include <stddef.h>

#include <memory>

#include <vector>

#include "api/video/encoded_image.h"

#include "api/video_codecs/spatial_layer.h"

#include "api/video_codecs/video_codec.h"

#include "modules/video_coding/include/video_codec_interface.h"

#include "modules/video_coding/svc/scalable_video_controller.h"

#include "rtc_base/system/rtc_export.h"

namespace webrtc {

class RTC_EXPORT SimulcastToSvcConverter {

 public:

  explicit SimulcastToSvcConverter(const VideoCodec&);

  SimulcastToSvcConverter(SimulcastToSvcConverter&&) = default;

  SimulcastToSvcConverter(const SimulcastToSvcConverter&) = delete;

  SimulcastToSvcConverter& operator=(const SimulcastToSvcConverter&) = delete;

  SimulcastToSvcConverter& operator=(SimulcastToSvcConverter&&) = default;

  ~SimulcastToSvcConverter() = default;

  VideoCodec GetConfig() const;

  void EncodeStarted(bool force_keyframe);

  bool ConvertFrame(EncodedImage& encoded_image,

                    CodecSpecificInfo& codec_specific);

 private:

  struct LayerState {

    LayerState(ScalabilityMode scalability_mode, int num_temporal_layers);

    ~LayerState() = default;

    LayerState(const LayerState&) = delete;

    LayerState(LayerState&&) = default;

    std::unique_ptr<ScalableVideoController> video_controller;

    ScalableVideoController::LayerFrameConfig layer_config;

    bool awaiting_frame;

};

  VideoCodec config_;

  std::vector<LayerState> layers_;

};

}  // namespace webrtc

#endif  // MODULES_VIDEO_CODING_SVC_SIMULCAST_TO_SVC_CONVERTER_H_