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/*
* This file is part of AtracDEnc.
*
* AtracDEnc 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.
*
* AtracDEnc 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with AtracDEnc; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "at3p_bitstream.h"
#include <lib/bitstream/bitstream.h>
#include <env.h>
#include <iostream>
namespace NAtracDEnc {
TAt3PBitStream::TAt3PBitStream(ICompressedOutput* container, uint16_t frameSz)
: Container(container)
, FrameSz(frameSz)
{
NEnv::SetRoundFloat();
}
void TAt3PBitStream::WriteFrame(int channels)
{
NBitStream::TBitStream bitStream;
// First bit must be zero
bitStream.Write(0, 1);
// Channel block type
// 0 - MONO block
// 1 - STEREO block
// 2 - Nobody know
bitStream.Write(channels - 1, 2);
// Skip some bits to produce correct zero bitstream
bitStream.Write(0, 10);
if (channels == 2) {
bitStream.Write(0, 14);
} else {
bitStream.Write(0, 5);
}
// Terminator
bitStream.Write(3, 2);
std::vector<char> buf = bitStream.GetBytes();
buf.resize(FrameSz);
Container->WriteFrame(buf);
}
}
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