modules/rtp_rtcp/source/rtp_format.h

/*
 *  Copyright (c) 2014 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_RTP_RTCP_SOURCE_RTP_FORMAT_H_
#define MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_H_

#include <string>

#include "common_types.h"  // NOLINT(build/include)
#include "modules/include/module_common_types.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "rtc_base/constructormagic.h"

namespace webrtc {
class RtpPacketToSend;

class RtpPacketizer {
 public:
  static RtpPacketizer* Create(VideoCodecType type,
                               size_t max_payload_len,
                               size_t last_packet_reduction_len,
                               const RTPVideoTypeHeader* rtp_type_header,
                               FrameType frame_type);

  virtual ~RtpPacketizer() {}

  // Returns total number of packets which would be produced by the packetizer.
  virtual size_t SetPayloadData(
      const uint8_t* payload_data,
      size_t payload_size,
      const RTPFragmentationHeader* fragmentation) = 0;

  // Get the next payload with payload header.
  // Write payload and set marker bit of the |packet|.
  // Returns true on success, false otherwise.
  virtual bool NextPacket(RtpPacketToSend* packet) = 0;

  virtual std::string ToString() = 0;
};

// TODO(sprang): Update the depacketizer to return a std::unqie_ptr with a copy
// of the parsed payload, rather than just a pointer into the incoming buffer.
// This way we can move some parsing out from the jitter buffer into here, and
// the jitter buffer can just store that pointer rather than doing a copy there.
class RtpDepacketizer {
 public:
  struct ParsedPayload {
    RTPVideoHeader& video_header() { return video; }
    const RTPVideoHeader& video_header() const { return video; }
    RTPVideoHeader video;

    const uint8_t* payload;
    size_t payload_length;
    FrameType frame_type;
  };

  static RtpDepacketizer* Create(VideoCodecType type);

  virtual ~RtpDepacketizer() {}

  // Parses the RTP payload, parsed result will be saved in |parsed_payload|.
  virtual bool Parse(ParsedPayload* parsed_payload,
                     const uint8_t* payload_data,
                     size_t payload_data_length) = 0;
};
}  // namespace webrtc
#endif  // MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_H_