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/*
converts raw mpeg audio stream data into mpeg I encoded audio frames/packets
Copyright (C) 2001 Martin Vogt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation.
For more information look at the file COPYRIGHT in this package
*/
#ifndef __MPEGAUDIOFRAME_H
#define __MPEGAUDIOFRAME_H
#include "mpegAudioHeader.h"
#include "../frame/framer.h"
#include <kdemacros.h>
/*
Here we are framing from raw to mpeg audio.
*/
class KDE_EXPORT MpegAudioFrame : public Framer {
// max size of buffer is:
// header: 4
// max bitrate: 448
// min freq: 22050
// padding: 1
// ------------------
// maxsize: 4+144000*max(bitrate)/min(freq)+1 ca: 2931 byte
// then we add a "sentinel" at the end these are 4 byte.
// so we should be ok, with a 4KB buffer.
// internal, how much data we need to read
int framesize;
// internall, for header searching
int find_frame_state;
// internal use for header parsing+validating
MpegAudioHeader* mpegAudioHeader;
public:
MpegAudioFrame();
~MpegAudioFrame();
private:
int find_frame(RawDataBuffer* input,RawDataBuffer* store);
int read_frame(RawDataBuffer* input,RawDataBuffer* store);
void unsync(RawDataBuffer* store,int lReset);
void printPrivateStates();
};
#endif
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