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/*************************************************************************
VorbisEncoder.h - sub encoder base class for Vorbis in an Ogg container
-------------------
begin : Thu Jan 03 2013
copyright : (C) 2013 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#ifndef VORBIS_ENCODER_H
#define VORBIS_ENCODER_H
#include "config.h"
#include <vorbis/vorbisenc.h>
#include "libkwave/FileInfo.h"
#include "libkwave/VorbisCommentMap.h"
#include "OggSubEncoder.h"
class QIODevice;
class QWidget;
namespace Kwave
{
class FileInfo;
class MultiTrackReader;
class VorbisEncoder: public Kwave::OggSubEncoder
{
public:
/**
* Constructor
*/
VorbisEncoder();
/** Destructor */
~VorbisEncoder() override;
/**
* parse the header of the stream and initialize the decoder
* @param widget a QWidget to be used as parent for error messages
* @param info reference to a FileInfo to fill
* @param src MultiTrackReader used as source of the audio data
* @return true if succeeded, false if failed
*/
virtual bool open(QWidget *widget,
const Kwave::FileInfo &info,
Kwave::MultiTrackReader &src) override;
/**
* write the header information
* @param dst a QIODevice that receives the raw data
* @return true if succeeded, false if failed
*/
bool writeHeader(QIODevice &dst) override;
/**
* encode received ogg data
* @param src MultiTrackReader used as source of the audio data
* @param dst a QIODevice that receives the raw data
* @return true if succeeded, false if failed
*/
virtual bool encode(Kwave::MultiTrackReader &src,
QIODevice &dst) override;
/**
* finished the encoding, clean up
*/
void close() override;
private:
/** Encodes all file properties into a vorbis comment */
void encodeProperties(const Kwave::FileInfo &info);
private:
/** map for translating Vorbis comments to Kwave FileInfo */
Kwave::VorbisCommentMap m_comments_map;
/** file info, set in open(...) */
Kwave::FileInfo m_info;
/** take physical pages, weld into a logical stream of packets */
ogg_stream_state m_os;
/** one Ogg bitstream page. Vorbis packets are inside */
ogg_page m_og;
/** one raw packet of data for decode */
ogg_packet m_op;
/** struct that stores all the static vorbis bitstream settings */
vorbis_info m_vi;
/** struct that stores all the user comments */
vorbis_comment m_vc;
/** central working state for the packet->PCM decoder */
vorbis_dsp_state m_vd;
/** local working space for packet->PCM decode */
vorbis_block m_vb;
};
}
#endif /* VORBIS_ENCODER_H */
//***************************************************************************
//***************************************************************************
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