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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 "atrac1.h"
#include "bitstream/bitstream.h"
#include <stdexcept>
namespace NAtracDEnc {
namespace NAtrac1 {
constexpr uint32_t TAtrac1Data::BlocksPerBand[NumQMF + 1];
constexpr uint32_t TAtrac1Data::SpecsPerBlock[MaxBfus];
constexpr uint32_t TAtrac1Data::SpecsStartLong[MaxBfus];
constexpr uint32_t TAtrac1Data::SpecsStartShort[MaxBfus];
constexpr uint32_t TAtrac1Data::BfuAmountTab[8];
float TAtrac1Data::ScaleTable[64] = {0};
float TAtrac1Data::SineWindow[32] = {0};
const static TAtrac1Data Atrac1Data;
std::array<int, 3> TAtrac1Data::TBlockSizeMod::Parse(NBitStream::TBitStream* stream) {
std::array<int, 3> tmp;
tmp[0] = 2 - stream->Read(2);
tmp[1] = 2 - stream->Read(2);
tmp[2] = 3 - stream->Read(2);
stream->Read(2); //skip unused 2 bits
// LogCount is used as the shift count for the number of MDCT blocks
// (1 << LogCount). A malformed frame can encode a value that makes this
// negative, which is undefined behaviour and leads to out-of-bounds
// access during the (I)MDCT. Reject such frames.
for (int i = 0; i < 3; i++) {
if (tmp[i] < 0)
throw std::runtime_error("invalid ATRAC1 block size mode");
}
return tmp;
}
} //namespace NAtrac1
} //namespace NAtracDEnc
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