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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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <math.h>
#include <cstdint>
#include <vector>
#include "config.h"
namespace NAtracDEnc {
class TTransientDetector {
const uint32_t ShortSz;
const uint32_t BlockSz;
const uint32_t NShortBlocks;
static const uint32_t PrevBufSz = 20;
static const uint32_t FIRLen = 21;
void HPFilter(const TFloat* in, TFloat* out);
std::vector<TFloat> HPFBuffer;
TFloat LastEnergy = 0.0;
uint32_t LastTransientPos = 0;
public:
TTransientDetector(uint32_t shortSz, uint32_t blockSz)
: ShortSz(shortSz)
, BlockSz(blockSz)
, NShortBlocks(blockSz/shortSz)
{
HPFBuffer.resize(BlockSz + FIRLen);
}
bool Detect(const TFloat* buf);
uint32_t GetLastTransientPos() const { return LastTransientPos; }
};
std::vector<TFloat> AnalyzeGain(const TFloat* in, uint32_t len, uint32_t maxPoints, bool useRms);
}
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