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/*
* Copyright (C) 2008-2010 The QXmpp developers
*
* Author:
* Jeremy Lainé
*
* Source:
* http://code.google.com/p/qxmpp
*
* This file is a part of QXmpp library.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
*/
#ifndef QXMPPCODEC_H
#define QXMPPCODEC_H
#include <QtGlobal>
/// \brief The QXmppCodec class is the base class for audio codecs capable of
/// encoding and decoding audio samples.
///
/// Samples must be 16-bit little endian.
class QXmppCodec
{
public:
/// Reads samples from the input stream, encodes them and writes the
/// encoded data to the output stream.
virtual qint64 encode(QDataStream &input, QDataStream &output) = 0;
/// Reads encoded data from the input stream, decodes it and writes the
/// decoded samples to the output stream.
virtual qint64 decode(QDataStream &input, QDataStream &output) = 0;
};
/// \internal
///
/// The QXmppG711aCodec class represent a G.711 a-law PCM codec.
class QXmppG711aCodec : public QXmppCodec
{
public:
QXmppG711aCodec(int clockrate);
qint64 encode(QDataStream &input, QDataStream &output);
qint64 decode(QDataStream &input, QDataStream &output);
private:
int m_frequency;
};
/// \internal
///
/// The QXmppG711uCodec class represent a G.711 u-law PCM codec.
class QXmppG711uCodec : public QXmppCodec
{
public:
QXmppG711uCodec(int clockrate);
qint64 encode(QDataStream &input, QDataStream &output);
qint64 decode(QDataStream &input, QDataStream &output);
private:
int m_frequency;
};
#ifdef QXMPP_USE_SPEEX
typedef struct SpeexBits SpeexBits;
/// \internal
///
/// The QXmppSpeexCodec class represent a SPEEX codec.
class QXmppSpeexCodec : public QXmppCodec
{
public:
QXmppSpeexCodec(int clockrate);
~QXmppSpeexCodec();
qint64 encode(QDataStream &input, QDataStream &output);
qint64 decode(QDataStream &input, QDataStream &output);
private:
SpeexBits *encoder_bits;
void *encoder_state;
SpeexBits *decoder_bits;
void *decoder_state;
int frame_samples;
};
#endif
#endif
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