RootInflator.h

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * RootInflator.h
 * Interface for the RootInflator class.
 * Copyright (C) 2009 Simon Newton
 */

#ifndef LIBS_ACN_ROOTINFLATOR_H_
#define LIBS_ACN_ROOTINFLATOR_H_

#include <ola/Callback.h>
#include <ola/Logging.h>
#include <memory>
#include "ola/acn/ACNVectors.h"
#include "libs/acn/BaseInflator.h"

namespace ola {
namespace acn {

class NullInflator : public InflatorInterface {
 public:
  uint32_t Id() const { return ola::acn::VECTOR_ROOT_NULL; }

  unsigned int InflatePDUBlock(OLA_UNUSED HeaderSet *headers,
                               OLA_UNUSED const uint8_t *data,
                               unsigned int len) {
    if (len) {
      OLA_WARN << "VECTOR_ROOT_NULL contained data of size " << len;
    }
    return 0;
  }
};


class RootInflator: public BaseInflator {
 public:
  typedef ola::Callback1<void, const TransportHeader&> OnDataCallback;

  explicit RootInflator(OnDataCallback *on_data = NULL)
    : BaseInflator(),
      m_on_data(on_data) {
    AddInflator(&m_null_inflator);
  }

  uint32_t Id() const { return 0; }  // no effect for the root inflator

 protected:
  // Decode a header block and adds any PduHeaders to the HeaderSet object
  bool DecodeHeader(HeaderSet *headers, const uint8_t *data,
                    unsigned int len, unsigned int *bytes_used);

  void ResetHeaderField();
  bool PostHeader(uint32_t vector, const HeaderSet &headers);

 private :
  NullInflator m_null_inflator;
  RootHeader m_last_hdr;
  std::auto_ptr<OnDataCallback> m_on_data;
};
}  // namespace acn
}  // namespace ola
#endif  // LIBS_ACN_ROOTINFLATOR_H_