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/*************************************************************************
FlacEncoder.h - encoder for FLAC data
-------------------
begin : Tue Feb 28 2004
copyright : (C) 2004 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 FLAC_ENCODER_H
#define FLAC_ENCODER_H
#include "config.h"
#include <QList>
#include <QVector>
#include <FLAC++/encoder.h>
#include <FLAC++/metadata.h>
#include <FLAC/format.h>
#include <vorbis/vorbisenc.h>
#include "libkwave/Encoder.h"
#include "libkwave/VorbisCommentMap.h"
class QIODevice;
class QWidget;
namespace Kwave
{
class MultiTrackReader;
class FlacEncoder: public Kwave::Encoder,
protected FLAC::Encoder::Stream
{
public:
/** Constructor */
FlacEncoder();
/** Destructor */
~FlacEncoder() override;
/** Returns a new instance of the encoder */
Kwave::Encoder *instance() override;
/**
* Encodes a signal into a stream of bytes.
* @param widget a widget that can be used for displaying
* message boxes or dialogs
* @param src MultiTrackReader used as source of the audio data
* @param dst file or other source to receive a stream of bytes
* @param meta_data meta data of the file to save
* @return true if succeeded, false on errors
*/
virtual bool encode(QWidget *widget, Kwave::MultiTrackReader &src,
QIODevice &dst,
const Kwave::MetaDataList &meta_data)
override;
/** Returns a list of supported file properties */
virtual QList<Kwave::FileProperty> supportedProperties()
override;
protected:
/**
* Callback for writing data to the FLAC layer
*
* @param buffer array with samples
* @param bytes length of the buffer in bytes
* @param samples the number of samples
* @param current_frame index of the current frame
* @return FLAC stream encoder write status
*/
virtual ::FLAC__StreamEncoderWriteStatus write_callback(
const FLAC__byte buffer[], size_t bytes,
unsigned samples, unsigned current_frame) override;
/**
* Callback for encoding meta data
*
* @param metadata pointer to a FLAC metadata structure that will
* be filled
*/
virtual void metadata_callback(const ::FLAC__StreamMetadata *metadata)
override;
/**
* Encode all Kwave file info into FLAC meta data
*
* @param info information about the file to be saved
* @param flac_metadata QList with collects the FLAC metadata
*/
virtual void encodeMetaData(const Kwave::FileInfo &info,
QVector<FLAC__StreamMetadata *> &flac_metadata);
protected:
class VorbisCommentContainer
{
public:
/** Constructor */
VorbisCommentContainer();
/** Destructor */
virtual ~VorbisCommentContainer();
/**
* add a new comment
*
* @param tag name of the vorbis tag, as string
* @param value the value of the tag, as string
*/
void add(const QString &tag, const QString &value);
/** Returns a pointer to the FLAC metadata */
FLAC__StreamMetadata *data();
private:
/** list of metadata objects */
FLAC__StreamMetadata *m_vc;
};
private:
/** map for translating vorbis comments to FileInfo properties */
Kwave::VorbisCommentMap m_vorbis_comment_map;
/** pointer to the QIODevice for storing, used while encoding */
QIODevice *m_dst;
};
}
#endif /* FLAC_ENCODER_H */
//***************************************************************************
//***************************************************************************
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