/*
 *  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 MEDIA_BASE_MEDIACONFIG_H_
#define MEDIA_BASE_MEDIACONFIG_H_

namespace cricket {

// Construction-time settings, passed on when creating
// MediaChannels.
struct MediaConfig {
  // Set DSCP value on packets. This flag comes from the
  // PeerConnection constraint 'googDscp'.
  bool enable_dscp = false;

  // Video-specific config.
  struct Video {
    // Enable WebRTC CPU Overuse Detection. This flag comes from the
    // PeerConnection constraint 'googCpuOveruseDetection'.
    bool enable_cpu_adaptation = true;

    // Enable WebRTC suspension of video. No video frames will be sent
    // when the bitrate is below the configured minimum bitrate. This
    // flag comes from the PeerConnection constraint
    // 'googSuspendBelowMinBitrate', and WebRtcVideoChannel copies it
    // to VideoSendStream::Config::suspend_below_min_bitrate.
    bool suspend_below_min_bitrate = false;

    // Set to true if the renderer has an algorithm of frame selection.
    // If the value is true, then WebRTC will hand over a frame as soon as
    // possible without delay, and rendering smoothness is completely the duty
    // of the renderer;
    // If the value is false, then WebRTC is responsible to delay frame release
    // in order to increase rendering smoothness.
    //
    // This flag comes from PeerConnection's RtcConfiguration, but is
    // currently only set by the command line flag
    // 'disable-rtc-smoothness-algorithm'.
    // WebRtcVideoChannel::AddRecvStream copies it to the created
    // WebRtcVideoReceiveStream, where it is returned by the
    // SmoothsRenderedFrames method. This method is used by the
    // VideoReceiveStream, where the value is passed on to the
    // IncomingVideoStream constructor.
    bool enable_prerenderer_smoothing = true;

    // Enables periodic bandwidth probing in application-limited region.
    bool periodic_alr_bandwidth_probing = false;

    // Enables the new method to estimate the cpu load from encoding, used for
    // cpu adaptation. This flag is intended to be controlled primarily by a
    // Chrome origin-trial.
    // TODO(bugs.webrtc.org/8504): If all goes well, the flag will be removed
    // together with the old method of estimation.
    bool experiment_cpu_load_estimator = false;
  } video;

  bool operator==(const MediaConfig& o) const {
    return enable_dscp == o.enable_dscp &&
           video.enable_cpu_adaptation == o.video.enable_cpu_adaptation &&
           video.suspend_below_min_bitrate ==
               o.video.suspend_below_min_bitrate &&
           video.enable_prerenderer_smoothing ==
               o.video.enable_prerenderer_smoothing &&
           video.periodic_alr_bandwidth_probing ==
               o.video.periodic_alr_bandwidth_probing &&
           video.experiment_cpu_load_estimator ==
               o.video.experiment_cpu_load_estimator;
  }

  bool operator!=(const MediaConfig& o) const { return !(*this == o); }
};

}  // namespace cricket

#endif  // MEDIA_BASE_MEDIACONFIG_H_