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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * RootInflator.h
 * Interface for the RootInflator class.
 * Copyright (C) 2009 Simon Newton
 */

#ifndef PLUGINS_E131_E131_ROOTINFLATOR_H_
#define PLUGINS_E131_E131_ROOTINFLATOR_H_

#include <ola/Callback.h>
#include <ola/Logging.h>
#include <memory>
#include "ola/acn/ACNVectors.h"
#include "plugins/e131/e131/BaseInflator.h"

namespace ola {
namespace plugin {
namespace e131 {

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

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


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 e131
}  // namespace plugin
}  // namespace ola
#endif  // PLUGINS_E131_E131_ROOTINFLATOR_H_