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/*
* Copyright 2006 Milan Digital Audio LLC
* Copyright 2009-2023 GrandOrgue contributors (see AUTHORS)
* License GPL-2.0 or later
* (https://www.gnu.org/licenses/old-licenses/gpl-2.0.html).
*/
#include "GOSampleStatistic.h"
#include <math.h>
GOSampleStatistic::GOSampleStatistic() : m_Valid(false) {}
GOSampleStatistic::~GOSampleStatistic() {}
void GOSampleStatistic::Prepare() {
if (!m_Valid)
Init();
}
void GOSampleStatistic::Init() {
m_Valid = true;
m_MemorySize = 0;
m_EndSegmentSize = 0;
m_MinBitsPerSample = 0xff;
m_MaxBitsPerSample = 0;
m_UsedBits = 0;
m_AllocatedSamples = 0;
}
void GOSampleStatistic::Cumulate(const GOSampleStatistic &stat) {
if (!stat.IsValid())
return;
Prepare();
m_MemorySize += stat.m_MemorySize;
m_EndSegmentSize += stat.m_EndSegmentSize;
if (m_MinBitsPerSample > stat.m_MinBitsPerSample)
m_MinBitsPerSample = stat.m_MinBitsPerSample;
if (m_MaxBitsPerSample < stat.m_MaxBitsPerSample)
m_MaxBitsPerSample = stat.m_MaxBitsPerSample;
m_UsedBits += stat.m_UsedBits;
m_AllocatedSamples += stat.m_AllocatedSamples;
}
bool GOSampleStatistic::IsValid() const { return m_Valid; }
void GOSampleStatistic::SetMemorySize(size_t size) {
Prepare();
m_MemorySize = size;
}
size_t GOSampleStatistic::GetMemorySize() const { return m_MemorySize; }
void GOSampleStatistic::SetEndSegmentSize(size_t size) {
Prepare();
m_EndSegmentSize = size;
}
void GOSampleStatistic::SetBitsPerSample(
unsigned bits, unsigned samples, unsigned max_value) {
if (bits < m_MinBitsPerSample)
m_MinBitsPerSample = bits;
if (bits > m_MaxBitsPerSample)
m_MaxBitsPerSample = bits;
m_UsedBits = samples * (size_t)max_value;
m_AllocatedSamples = samples;
}
size_t GOSampleStatistic::GetEndSegmentSize() const { return m_EndSegmentSize; }
unsigned GOSampleStatistic::GetMinBitPerSample() const {
return m_MinBitsPerSample;
}
unsigned GOSampleStatistic::GetMaxBitPerSample() const {
return m_MaxBitsPerSample;
}
float GOSampleStatistic::GetUsedBits() const {
if (m_AllocatedSamples)
return 1 + log2(m_UsedBits / (double)m_AllocatedSamples);
else
return 0;
}
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