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#include "encoder/encodersndfileflac.h"
#include <QtDebug>
#include "encoder/encodercallback.h"
#include "util/sample.h"
namespace {
constexpr SINT kEncBufferSize = 8192; // used inside libsndfile for flac
constexpr CSAMPLE_GAIN kFloatToIntConversionFactor = INT_MIN * -1.0f;
//static
void convertFloat32ToIntFormat(int* pDest, const CSAMPLE* pSrc, SINT numSamples, int format) {
if (format & SF_FORMAT_PCM_16) {
// note: LOOP VECTORIZED"
for (SINT i = 0; i < numSamples; ++i) {
pDest[i] = static_cast<int>(math_clamp(pSrc[i] * kFloatToIntConversionFactor,
static_cast<CSAMPLE>(static_cast<int>(INT_MIN & 0xFFFF0000)),
static_cast<CSAMPLE>(static_cast<int>(INT_MAX & 0xFFFF0000))));
}
} else if (format & SF_FORMAT_PCM_24) {
// note: LOOP VECTORIZED"
for (SINT i = 0; i < numSamples; ++i) {
pDest[i] = static_cast<int>(math_clamp(pSrc[i] * kFloatToIntConversionFactor,
static_cast<CSAMPLE>(static_cast<int>(INT_MIN & 0xFFFFFF00)),
static_cast<CSAMPLE>(static_cast<int>(INT_MAX & 0xFFFFFF00))));
}
} else {
DEBUG_ASSERT(!"Not implemented");
}
}
} // namespace
EncoderSndfileFlac::EncoderSndfileFlac(EncoderCallback* pCallback)
: EncoderWave(pCallback),
m_compression(0) {
}
void EncoderSndfileFlac::setEncoderSettings(const EncoderSettings& settings)
{
m_sfInfo.format = SF_FORMAT_FLAC;
int radio = settings.getSelectedOption(EncoderFlacSettings::BITS_GROUP);
switch(radio) {
case 0:
m_sfInfo.format |= SF_FORMAT_PCM_16;
break;
case 1:
m_sfInfo.format |= SF_FORMAT_PCM_24;
break;
default:
m_sfInfo.format |= SF_FORMAT_PCM_16;
qWarning() << " Unexpected radio index on setEncoderSettings: "
<< radio << ". reverting to Flac 16bits";
break;
}
m_compression = static_cast<double>(settings.getCompression()) / 8.0;
}
void EncoderSndfileFlac::encodeBuffer(const CSAMPLE* pBuffer, const int iBufferSize) {
if (m_pClampBuffer) {
SINT numSamplesLeft = iBufferSize;
while (numSamplesLeft > 0) {
const SINT numSamplesToWrite = math_min(numSamplesLeft, kEncBufferSize);
convertFloat32ToIntFormat(m_pClampBuffer.get(),
pBuffer,
numSamplesToWrite,
m_sfInfo.format);
sf_write_int(m_pSndfile, m_pClampBuffer.get(), numSamplesToWrite);
pBuffer += numSamplesToWrite;
numSamplesLeft -= numSamplesToWrite;
}
} else {
sf_write_float(m_pSndfile, pBuffer, iBufferSize);
}
}
void EncoderSndfileFlac::initStream() {
EncoderWave::initStream();
#if defined SFC_SUPPORTS_SET_COMPRESSION_LEVEL // Seems that this only exists since version 1.0.26
// Tell the compression setting to use.
sf_command(m_pSndfile, SFC_SET_COMPRESSION_LEVEL, &m_compression, sizeof(double));
#endif //SFC_SUPPORTS_SET_COMPRESSION_LEVEL
// Version 1.0.28 suffers broken clamping https://bugs.launchpad.net/mixxx/+bug/1915298
// We receive "libsndfile-1.0.28" on Ubuntu Focal 20.04 LTS/Grovy 20.10
// Older versions are not expected. All newer version have a working internal clamping
const char* sf_version = sf_version_string();
if (strstr(sf_version, "-1.0.28") != nullptr) {
m_pClampBuffer = std::make_unique<int[]>(kEncBufferSize);
sf_command(m_pSndfile, SFC_SET_CLIPPING, nullptr, SF_FALSE);
}
}
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