call/rtp_payload_params.h

/*
 *  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 CALL_RTP_PAYLOAD_PARAMS_H_
#define CALL_RTP_PAYLOAD_PARAMS_H_

#include <array>

#include "absl/types/optional.h"
#include "api/video_codecs/video_encoder.h"
#include "call/rtp_config.h"
#include "modules/rtp_rtcp/source/rtp_generic_frame_descriptor.h"
#include "modules/rtp_rtcp/source/rtp_video_header.h"
#include "modules/video_coding/include/video_codec_interface.h"

namespace webrtc {

class RtpRtcp;

// State for setting picture id and tl0 pic idx, for VP8 and VP9
// TODO(nisse): Make these properties not codec specific.
class RtpPayloadParams final {
 public:
  RtpPayloadParams(const uint32_t ssrc, const RtpPayloadState* state);
  RtpPayloadParams(const RtpPayloadParams& other);
  ~RtpPayloadParams();

  RTPVideoHeader GetRtpVideoHeader(const EncodedImage& image,
                                   const CodecSpecificInfo* codec_specific_info,
                                   int64_t shared_frame_id);

  uint32_t ssrc() const;

  RtpPayloadState state() const;

 private:
  void SetCodecSpecific(RTPVideoHeader* rtp_video_header,
                        bool first_frame_in_picture);
  void SetGeneric(const CodecSpecificInfo* codec_specific_info,
                  int64_t frame_id,
                  bool is_keyframe,
                  RTPVideoHeader* rtp_video_header);

  void Vp8ToGeneric(const CodecSpecificInfoVP8& vp8_info,
                    int64_t shared_frame_id,
                    bool is_keyframe,
                    RTPVideoHeader* rtp_video_header);

  void H264ToGeneric(const CodecSpecificInfoH264& h264_info,
                     int64_t shared_frame_id,
                     bool is_keyframe,
                     RTPVideoHeader* rtp_video_header);

  void GenericToGeneric(int64_t shared_frame_id,
                        bool is_keyframe,
                        RTPVideoHeader* rtp_video_header);

  // TODO(bugs.webrtc.org/10242): Remove once all encoder-wrappers are updated.
  // Holds the last shared frame id for a given (spatial, temporal) layer.
  std::array<std::array<int64_t, RtpGenericFrameDescriptor::kMaxTemporalLayers>,
             RtpGenericFrameDescriptor::kMaxSpatialLayers>
      last_shared_frame_id_;

  // TODO(eladalon): When additional codecs are supported,
  // set kMaxCodecBuffersCount to the max() of these codecs' buffer count.
  static constexpr size_t kMaxCodecBuffersCount =
      CodecSpecificInfoVP8::kBuffersCount;

  // Maps buffer IDs to the frame-ID stored in them.
  std::array<int64_t, kMaxCodecBuffersCount> buffer_id_to_frame_id_;

  const uint32_t ssrc_;
  RtpPayloadState state_;

  const bool generic_picture_id_experiment_;
  const bool generic_descriptor_experiment_;
};
}  // namespace webrtc
#endif  // CALL_RTP_PAYLOAD_PARAMS_H_