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/*
* Copyright (C) 2008-2012 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>
#include "QXmppGlobal.h"
class QXmppRtpPacket;
class QXmppVideoFormat;
class QXmppVideoFrame;
/// \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 QXMPP_EXPORT QXmppCodec
{
public:
virtual ~QXmppCodec();
/// 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 QXMPP_EXPORT 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
/// \brief The QXmppVideoDecoder class is the base class for video decoders.
///
class QXMPP_EXPORT QXmppVideoDecoder
{
public:
virtual ~QXmppVideoDecoder();
/// Returns the format of the video stream.
virtual QXmppVideoFormat format() const = 0;
/// Handles an RTP \a packet and returns a list of decoded video frames.
virtual QList<QXmppVideoFrame> handlePacket(const QXmppRtpPacket &packet) = 0;
/// Sets the video stream's \a parameters.
virtual bool setParameters(const QMap<QString, QString> ¶meters) = 0;
};
/// \brief The QXmppVideoEncoder class is the base class for video encoders.
///
class QXMPP_EXPORT QXmppVideoEncoder
{
public:
virtual ~QXmppVideoEncoder();
/// Sets the \a format of the video stream.
virtual bool setFormat(const QXmppVideoFormat &format) = 0;
/// Handles a video \a frame and returns a list of RTP packet payloads.
virtual QList<QByteArray> handleFrame(const QXmppVideoFrame &frame) = 0;
/// Returns the video stream's parameters.
virtual QMap<QString, QString> parameters() const = 0;
};
#ifdef QXMPP_USE_THEORA
class QXmppTheoraDecoderPrivate;
class QXmppTheoraEncoderPrivate;
class QXMPP_EXPORT QXmppTheoraDecoder : public QXmppVideoDecoder
{
public:
QXmppTheoraDecoder();
~QXmppTheoraDecoder();
QXmppVideoFormat format() const;
QList<QXmppVideoFrame> handlePacket(const QXmppRtpPacket &packet);
bool setParameters(const QMap<QString, QString> ¶meters);
private:
QXmppTheoraDecoderPrivate *d;
};
class QXMPP_EXPORT QXmppTheoraEncoder : public QXmppVideoEncoder
{
public:
QXmppTheoraEncoder();
~QXmppTheoraEncoder();
bool setFormat(const QXmppVideoFormat &format);
QList<QByteArray> handleFrame(const QXmppVideoFrame &frame);
QMap<QString, QString> parameters() const;
private:
QXmppTheoraEncoderPrivate *d;
};
#endif
#ifdef QXMPP_USE_VPX
class QXmppVpxDecoderPrivate;
class QXmppVpxEncoderPrivate;
class QXMPP_EXPORT QXmppVpxDecoder : public QXmppVideoDecoder
{
public:
QXmppVpxDecoder();
~QXmppVpxDecoder();
QXmppVideoFormat format() const;
QList<QXmppVideoFrame> handlePacket(const QXmppRtpPacket &packet);
bool setParameters(const QMap<QString, QString> ¶meters);
private:
QXmppVpxDecoderPrivate *d;
};
class QXMPP_EXPORT QXmppVpxEncoder : public QXmppVideoEncoder
{
public:
QXmppVpxEncoder();
~QXmppVpxEncoder();
bool setFormat(const QXmppVideoFormat &format);
QList<QByteArray> handleFrame(const QXmppVideoFrame &frame);
QMap<QString, QString> parameters() const;
private:
QXmppVpxEncoderPrivate *d;
};
#endif
#endif
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