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/* -*- C++ -*- */
/*
* Copyright 2008 Steve Glass
*
* This file is part of OP25.
*
* OP25 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 3, or (at your option)
* any later version.
*
* OP25 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 General Public
* License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OP25; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Boston, MA
* 02110-1301, USA.
*/
#ifndef INCLUDED_VOICE_DATA_UNIT_H
#define INCLUDED_VOICE_DATA_UNIT_H
#include <abstract_data_unit.h>
/**
* P25 Logical Data Unit 1 (compressed IBME voice).
*/
class voice_data_unit : public abstract_data_unit
{
public:
/**
* voice_data_unit (virtual) destuctor
*/
virtual ~voice_data_unit();
protected:
/**
* voice_data_unit constuctor
*
* \param frame_body A const_bit_queue representing the frame body.
*/
voice_data_unit(const_bit_queue& frame_body);
/**
* Applies error correction code to the specified bit_vector. Not
* that this function removes the PN sequences from the source
* frame.
*
* \param frame_body The bit vector to decode.
* \return
*/
virtual void do_correct_errors(bit_vector& frame_body);
/**
* Decode compressed audio using the supplied imbe_decoder.
*
* \param frame_body The const_bit_vector to decode.
* \param imbe The imbe_decoder to use to generate the audio.
*/
virtual void do_decode_audio(const_bit_vector& frame_body, imbe_decoder& imbe);
/**
* Returns the expected size (in bits) of this data_unit. For
* variable-length data this should return UINT16_MAX until the
* actual length of this frame is known.
*
* \return The expected size (in bits) of this data_unit when encoded.
*/
virtual uint16_t frame_size_max() const;
};
#endif /* INCLUDED_VOICE_DATA_UNIT_H */
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