bitrate_constraint.h

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/*

 *  Copyright 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 VIDEO_ADAPTATION_BITRATE_CONSTRAINT_H_

#define VIDEO_ADAPTATION_BITRATE_CONSTRAINT_H_

#include <string>

#include "absl/types/optional.h"

#include "api/sequence_checker.h"

#include "call/adaptation/adaptation_constraint.h"

#include "call/adaptation/encoder_settings.h"

#include "call/adaptation/video_source_restrictions.h"

#include "call/adaptation/video_stream_input_state.h"

#include "rtc_base/system/no_unique_address.h"

namespace webrtc {

class BitrateConstraint : public AdaptationConstraint {

 public:

  BitrateConstraint();

  ~BitrateConstraint() override = default;

  void OnEncoderSettingsUpdated(

      absl::optional<EncoderSettings> encoder_settings);

  void OnEncoderTargetBitrateUpdated(

      absl::optional<uint32_t> encoder_target_bitrate_bps);

  // AdaptationConstraint implementation.

  std::string Name() const override { return "BitrateConstraint"; }

  bool IsAdaptationUpAllowed(

      const VideoStreamInputState& input_state,

      const VideoSourceRestrictions& restrictions_before,

      const VideoSourceRestrictions& restrictions_after) const override;

 private:

  RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;

  absl::optional<EncoderSettings> encoder_settings_

      RTC_GUARDED_BY(&sequence_checker_);

  absl::optional<uint32_t> encoder_target_bitrate_bps_

      RTC_GUARDED_BY(&sequence_checker_);

};

}  // namespace webrtc

#endif  // VIDEO_ADAPTATION_BITRATE_CONSTRAINT_H_