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ReSampler.cpp
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ReSampler.cpp
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/*
* Copyright (C) 2016 - 2024 Judd Niemann - All Rights Reserved.
* You may use, distribute and modify this code under the
* terms of the GNU Lesser General Public License, version 2.1
*
* You should have received a copy of GNU Lesser General Public License v2.1
* with this file. If not, please refer to: https://github.com/jniemann66/ReSampler
*/
// ReSampler.cpp : Audio Sample Rate Converter by Judd Niemann.
#include "ReSampler.h"
#include "csv.h"
#include "ctpl/ctpl_stl.h"
#include "raiitimer.h"
#include "fraction.h"
#include "srconvert.h"
#include "ditherer.h"
#include "iqdemodulator.h"
#include "mpxdecode.h"
#include "stereoimager.h"
#include "fadeeffect.h"
#include "effectchain.h"
#include "dsf.h"
#include "dff.h"
#include <cstdio>
#include <string>
#include <iostream>
#include <vector>
#include <iomanip>
#include <regex>
////////////////////////////////////////////////////////////////////////////////////////
// This program uses the following libraries:
// 1:
// libsndfile
// available at http://www.mega-nerd.com/libsndfile/
//
// (copy of entire package included in $(ProjectDir)\libsbdfile)
//
// 2:
// fftw
// http://www.fftw.org/
//
// //
////////////////////////////////////////////////////////////////////////////////////////
namespace ReSampler {
// parseGlobalOptions() - result indicates whether to terminate.
bool parseGlobalOptions(int argc, char * argv[]) {
// help switch:
if (getCmdlineParam(argv, argv + argc, "--help") || getCmdlineParam(argv, argv + argc, "-h")) {
std::cout << strUsage << std::endl;
std::cout << "Additional options:\n\n" << strExtraOptions << std::endl;
return true;
}
// version switch:
if (getCmdlineParam(argv, argv + argc, "--version")) {
std::cout << strVersion << std::endl;
return true;
}
// compiler switch:
if (getCmdlineParam(argv, argv + argc, "--compiler")) {
showCompiler();
return true;
}
// sndfile-version switch:
if (getCmdlineParam(argv, argv + argc, "--sndfile-version")) {
char s[128];
sf_command(nullptr, SFC_GET_LIB_VERSION, s, sizeof(s));
std::cout << s << std::endl;
return true;
}
// listsubformats
if (getCmdlineParam(argv, argv + argc, "--listsubformats")) {
std::string filetype;
getCmdlineParam(argv, argv + argc, "--listsubformats", filetype);
listSubFormats(filetype);
return true;
}
// showDitherProfiles
if (getCmdlineParam(argv, argv + argc, "--showDitherProfiles")) {
showDitherProfiles();
return true;
}
// generate
if (getCmdlineParam(argv, argv + argc, "--generate")) {
std::string filename;
getCmdlineParam(argv, argv + argc, "--generate", filename);
generateExpSweep(filename);
return true;
}
return false;
}
// determineBestBitFormat() : determines the most appropriate bit format for the output file, through the following process:
// 1. Try to use infile's format and if that isn't valid for outfile, then:
// 2. use the default subformat for outfile.
// store best bit format as a string in BitFormat
bool determineBestBitFormat(std::string& bitFormat, const ConversionInfo& ci)
{
// get infile's extension from filename:
std::string inFileExt;
if (ci.inputFilename.find_last_of('.') != std::string::npos) {
inFileExt = ci.inputFilename.substr(ci.inputFilename.find_last_of('.') + 1);
}
bool dsfInput = false;
bool dffInput = false;
int inFileFormat = 0;
if (inFileExt == "dsf") {
dsfInput = true;
} else if (inFileExt == "dff") {
dffInput = true;
}
else { // libsndfile-openable file
if (ci.bRawInput) {
inFileFormat = SF_FORMAT_RAW | subFormats.at(ci.rawInputBitFormat);
} else {
// Inspect input file for format:
SndfileHandle infile(ci.inputFilename, SFM_READ);
inFileFormat = infile.format();
if (int e = infile.error())
{
std::cout << "Couldn't Open Input File (" << sf_error_number(e) << ")" << std::endl;
return false;
}
}
// get BitFormat of inFile as a string:
for (auto& subformat : subFormats) {
if (subformat.second == (inFileFormat & SF_FORMAT_SUBMASK)) {
bitFormat = subformat.first;
break;
}
}
// retrieve infile's TRUE extension (from the file contents), and if retrieval is successful, override extension derived from filename:
SF_FORMAT_INFO infileFormatInfo;
infileFormatInfo.format = inFileFormat & SF_FORMAT_TYPEMASK;
if (sf_command(nullptr, SFC_GET_FORMAT_INFO, &infileFormatInfo, sizeof(SF_FORMAT_INFO)) == 0) {
inFileExt = std::string(infileFormatInfo.extension);
}
}
// get outfile's extension:
std::string outFileExt;
if (ci.outputFilename.find_last_of('.') != std::string::npos)
outFileExt = ci.outputFilename.substr(ci.outputFilename.find_last_of('.') + 1);
// when the input file is dsf/dff, use default output subformat:
if (dsfInput || dffInput) { // choose default output subformat for chosen output file format
bitFormat = defaultSubFormats.find(outFileExt)->second;
std::cout << "defaulting to " << bitFormat << std::endl;
return true;
}
if(SF_FORMAT_INFO formatinfo; getMajorFormatFromFileExt(&formatinfo, outFileExt)) {
SF_INFO sfinfo;
memset(&sfinfo, 0, sizeof(sfinfo));
sfinfo.channels = 1;
sfinfo.format = formatinfo.format;
if (!sf_format_check(&sfinfo)) {
// infile's subformat is not valid for outfile's format; use outfile's default subformat
std::cout << "Output file format " << outFileExt << " and subformat " << bitFormat << " combination not valid ... ";
bitFormat.clear();
bitFormat = defaultSubFormats.find(outFileExt)->second;
std::cout << "defaulting to " << bitFormat << std::endl;
}
}
return true;
}
bool getMajorFormatFromFileExt(SF_FORMAT_INFO *info, const std::string& ext)
{
bool found = false;
if(info != nullptr) {
static const std::map<std::string, std::string> fileExtMap
{
#ifdef HAVE_MPEG
foo;
#endif
#ifdef ENABLE_MPEG_CAPABILITY
{"mp3", "m1a"},
{"mp2", "m1a"}
#endif
};
const auto it = fileExtMap.find(ext);
const std::string _ext = (it == fileExtMap.end() ? ext : it->second);
int major_count;
sf_command(nullptr, SFC_GET_FORMAT_MAJOR_COUNT, &major_count, sizeof(int));
// Loop through all major formats to find match for outFileExt:
for (int m = 0; m < major_count; ++m) {
memset(info, 0, sizeof(SF_FORMAT_INFO));
info->format = m;
sf_command(nullptr, SFC_GET_FORMAT_MAJOR, info, sizeof(SF_FORMAT_INFO));
if (stricmp(info->extension, _ext.c_str()) == 0) {
found = true;
break;
}
}
}
return found;
}
// determineOutputFormat() : returns an integer representing a libsndfile output format:
int determineOutputFormat(const std::string& outFileExt, const std::string& bitFormat)
{
SF_FORMAT_INFO info;
int format = 0;
if (getMajorFormatFromFileExt(&info, outFileExt)) {
// Check if subformat is recognized:
auto sf = subFormats.find(bitFormat);
if (sf != subFormats.end()) {
format = info.format | sf->second;
} else {
std::cout << "Warning: bit format " << bitFormat << " not recognised !" << std::endl;
}
}
// Special cases:
if (bitFormat == "8") {
// user specified 8-bit. Determine whether it must be unsigned or signed, based on major type:
// These formats always use unsigned 8-bit when they use 8-bit: mat rf64 voc w64 wav
if ((outFileExt == "mat") || (outFileExt == "rf64") || (outFileExt == "voc") || (outFileExt == "w64") || (outFileExt == "wav"))
format = info.format | SF_FORMAT_PCM_U8;
else
format = info.format | SF_FORMAT_PCM_S8;
}
return format;
}
// listSubFormats() - lists all valid subformats for a given file extension (without "." or "*."):
void listSubFormats(const std::string& f)
{
if (SF_FORMAT_INFO info; getMajorFormatFromFileExt(&info, f)) {
SF_INFO sfinfo;
memset(&sfinfo, 0, sizeof(sfinfo));
sfinfo.channels = 1;
// loop through all subformats and find which ones are valid for file type:
for (auto& subformat : subFormats) {
sfinfo.format = (info.format & SF_FORMAT_TYPEMASK) | subformat.second;
if (sf_format_check(&sfinfo)) {
std::cout << subformat.first << std::endl;
}
}
} else {
std::cout << "File extension " << f << " unknown" << std::endl;
}
}
// explicit instantiations - generate all required flavors of convert()
bool convert_DffFile_Float(ConversionInfo & ci) {
return convert<DffFile, float>(ci);
}
bool convert_DffFile_Double(ConversionInfo & ci) {
return convert<DffFile, double>(ci);
}
bool convert_DsfFile_Float(ConversionInfo & ci) {
return convert<DsfFile, float>(ci);
}
bool convert_DsfFile_Double(ConversionInfo & ci) {
return convert<DsfFile, double>(ci);
}
bool convert_SndfileHandle_Float(ConversionInfo & ci) {
return convert<SndfileHandle, float>(ci);
}
bool convert_SndfileHandle_Double(ConversionInfo & ci) {
return convert<SndfileHandle, double>(ci);
}
bool convert_IQFile_Float(ConversionInfo& ci) {
return convert<IQFile, float>(ci);
}
bool convert_IQFile_Double(ConversionInfo& ci) {
return convert<IQFile, double>(ci);
}
// convert()
/* Note: type 'FileReader' MUST implement the following methods:
constructor(const std::string& fileName)
constructor(const std::string& fileName, int infileMode, int infileFormat, int infileChannels, int infileRate)
bool error() // or int error()
unsigned int channels()
unsigned int samplerate()
uint64_t frames()
int format()
read(inbuffer, count)
seek(position, whence)
*/
template<typename FileReader, typename FloatType>
bool convert(ConversionInfo& ci)
{
const bool multiThreaded = ci.bMultiThreaded;
// pointer for temp file;
SndfileHandle* tmpSndfileHandle = nullptr;
// filename for temp file;
std::string tmpFilename;
// Prepare input file opening parameters
int infileMode;
int infileFormat = 0; // leave these zero for normal operation. (Only set for RAW input)
int infileChannels = 0;
int infileRate = 0;
if(ci.dsfInput) {
infileMode = Dsf_read;
} else if(ci.dffInput) {
infileMode = Dff_read;
} else {
infileMode = SFM_READ;
if(ci.bRawInput) {
auto it = subFormats.find(ci.rawInputBitFormat);
int infileSubFormat = (it != subFormats.end()) ? it->second : SF_FORMAT_PCM_16;
infileFormat = SF_FORMAT_RAW | infileSubFormat;
infileChannels = ci.rawInputChannels;
infileRate = ci.rawInputSampleRate;
std::cout << "raw input" << std::endl;
}
if(ci.bDemodulateIQ) {
infileFormat |= ((ci.IQModulationType | ci.IQDeEmphasisType) << 8);
ModulationType modulationType = ci.IQModulationType;
if (modulationType == WFM_NO_LOWPASS) {
modulationType = WFM;
}
// stuff the modulation type into the second-least-significant byte
auto k = std::find_if(std::begin(modulationTypeMap), std::end(modulationTypeMap), [modulationType](const std::pair<std::string, ModulationType> pair){
return pair.second == modulationType;
});
std::string s;
if(k != std::end(modulationTypeMap)) {
s = k->first;
}
std::cout << "IQ demodulation " << s << " ";
if(ci.IQDeEmphasisType != NoDeEmphasis) {
auto k1 = std::find_if(std::begin(deEmphasisTypeMap), std::end(deEmphasisTypeMap), [&](const std::pair<std::string, DeEmphasisType> pair){
return pair.second == ci.IQDeEmphasisType;
});
if(k1 != std::end(deEmphasisTypeMap)) {
std::cout << k1->first << "us de-emphasis";
}
}
std::cout << std::endl;
}
}
// Open input file
FileReader infile(ci.inputFilename, infileMode, infileFormat, infileChannels, infileRate);
const int e = infile.error();
if (e != SF_ERR_NO_ERROR) {
if(e == ERROR_IQFILE_WFM_SAMPLERATE_TOO_LOW) {
std::cout << "Sample Rate not high enough for WFM" << std::endl;
} else if (e == ERROR_IQFILE_TWO_CHANNELS_EXPECTED) {
std::cout << "2 channels expected for an I/Q input file !" << std::endl;
} else {
std::cout << "Error: Couldn't Open Input File (" << sf_error_number(e) << ")" << std::endl;
}
return false;
}
// read input file metadata:
MetaData m;
getMetaData(m, infile);
// read input file properties:
const int nChannels = static_cast<int>(infile.channels());
ci.inputSampleRate = infile.samplerate();
const sf_count_t inputFrames = infile.frames();
const sf_count_t inputSampleCount = inputFrames * nChannels;
const double inputDuration = 1000.0 * inputFrames / ci.inputSampleRate; // ms
// determine conversion ratio:
Fraction fraction = getFractionFromSamplerates(ci.inputSampleRate, ci.outputSampleRate);
// set buffer sizes:
const auto inputChannelBufferSize = static_cast<size_t>(BUFFERSIZE);
const auto inputBlockSize = static_cast<size_t>(BUFFERSIZE * nChannels);
const auto outputChannelBufferSize = static_cast<size_t>(1 + std::ceil(BUFFERSIZE * static_cast<double>(fraction.numerator) / static_cast<double>(fraction.denominator)));
const auto outputBlockSize = static_cast<size_t>(nChannels * (1 + outputChannelBufferSize));
// allocate buffers:
std::vector<FloatType> inputBlock(inputBlockSize, 0); // input buffer for storing interleaved samples from input file
std::vector<FloatType> outputBlock(outputBlockSize, 0); // output buffer for storing interleaved samples to be saved to output file
std::vector<std::vector<FloatType>> inputChannelBuffers; // input buffer for each channel to store deinterleaved samples
std::vector<std::vector<FloatType>> outputChannelBuffers; // output buffer for each channel to store converted deinterleaved samples
for (int n = 0; n < nChannels; n++) {
inputChannelBuffers.emplace_back(std::vector<FloatType>(inputChannelBufferSize, 0));
outputChannelBuffers.emplace_back(std::vector<FloatType>(outputChannelBufferSize, 0));
}
const int inputFileFormat = infile.format();
if (inputFileFormat != DFF_FORMAT && inputFileFormat != DSF_FORMAT) { // this block only relevant to libsndfile ...
// detect if input format is a floating-point format:
bool bFloat = false;
bool bDouble = false;
switch (inputFileFormat & SF_FORMAT_SUBMASK) {
case SF_FORMAT_FLOAT:
bFloat = true;
break;
case SF_FORMAT_DOUBLE:
bDouble = true;
break;
}
for (auto& subformat : subFormats) { // scan subformats for a match:
if (subformat.second == (inputFileFormat & SF_FORMAT_SUBMASK)) {
std::cout << "input bit format: " << subformat.first;
break;
}
}
if (bFloat) {
std::cout << " (float)";
}
if (bDouble) {
std::cout << " (double precision)";
}
std::cout << std::endl;
}
std::cout << "source file channels: " << nChannels << std::endl;
std::cout << "input sample rate: " << ci.inputSampleRate << "\noutput sample rate: " << ci.outputSampleRate << std::endl;
FloatType peakInputSample;
sf_count_t peakInputPosition = 0LL;
sf_count_t samplesRead = 0LL;
sf_count_t totalSamplesRead = 0LL;
if (ci.bEnablePeakDetection) {
peakInputSample = 0.0;
std::cout << "Scanning input file for peaks ...";
do {
samplesRead = infile.read(inputBlock.data(), inputBlockSize);
for (unsigned int s = 0; s < samplesRead; ++s) { // read all samples, without caring which channel they belong to
if (std::abs(inputBlock[s]) > peakInputSample) {
peakInputSample = std::abs(inputBlock[s]);
peakInputPosition = totalSamplesRead + s;
}
}
totalSamplesRead += samplesRead;
} while (samplesRead > 0);
std::cout << "Done\n";
std::cout << "Peak input sample: " << std::fixed << peakInputSample << " (" << 20 * log10(peakInputSample) << " dBFS) at ";
printSamplePosAsTime(peakInputPosition, ci.inputSampleRate);
std::cout << std::endl;
infile.seek(0, SEEK_SET); // rewind back to start of file
}
else { // no peak detection
peakInputSample = ci.bNormalize ?
0.5 /* ... a guess, since we haven't actually measured the peak (in the case of DSD, it is a good guess.) */ :
1.0;
}
if (ci.bNormalize) { // echo Normalization settings to user
const auto prec = std::cout.precision();
std::cout << "Normalizing to " << std::setprecision(2) << ci.limit << std::endl;
std::cout.precision(prec);
}
// echo filter settings to user:
double targetNyquist = std::min(ci.inputSampleRate, ci.outputSampleRate) / 2.0;
double ft = (ci.lpfCutoff / 100.0) * targetNyquist;
const auto prec = std::cout.precision();
std::cout << "LPF transition frequency: " << std::fixed << std::setprecision(2) << ft << " Hz (" << 100 * ft / targetNyquist << " %)" << std::endl;
std::cout.precision(prec);
if (ci.bMinPhase) {
std::cout << "Using Minimum-Phase LPF" << std::endl;
}
// echo conversion ratio to user:
const FloatType resamplingFactor = static_cast<FloatType>(ci.outputSampleRate) / ci.inputSampleRate;
std::cout << "Conversion ratio: " << resamplingFactor
<< " (" << fraction.numerator << ":" << fraction.denominator << ")" << std::endl;
// if the outputFormat is zero, it means "No change to file format"
// if output file format has changed, use outputFormat. Otherwise, use same format as infile:
int outputFileFormat = ci.outputFormat ? ci.outputFormat : inputFileFormat;
// if the minor (sub) format of outputFileFormat is not set, attempt to use minor format of input file (as a last resort)
if ((outputFileFormat & SF_FORMAT_SUBMASK) == 0) {
outputFileFormat |= (inputFileFormat & SF_FORMAT_SUBMASK); // may not be valid subformat for new file format.
}
// for wav files, determine whether to switch to rf64 mode:
if ((outputFileFormat & SF_FORMAT_TYPEMASK) == SF_FORMAT_WAV || (outputFileFormat & SF_FORMAT_TYPEMASK) == SF_FORMAT_WAVEX) {
if (ci.bRf64 ||
checkWarnOutputSize(inputSampleCount, getSfBytesPerSample(outputFileFormat), fraction.numerator, fraction.denominator)) {
std::cout << "Switching to rf64 format !" << std::endl;
outputFileFormat &= ~SF_FORMAT_TYPEMASK; // clear file type
outputFileFormat |= SF_FORMAT_RF64;
}
}
// note: libsndfile has an rf64 auto-downgrade mode:
// http://www.mega-nerd.com/libsndfile/command.html#SFC_RF64_AUTO_DOWNGRADE
// However, rf64 auto-downgrade is more appropriate for recording applications
// (where the final file size cannot be known until the recording has stopped)
// In the case of sample-rate conversions, the output file size (and therefore the decision to promote to rf64)
// can be determined at the outset.
// Determine the value of outputSignalBits, based on outputFileFormat.
// outputSignalsBits is used to set the level of the LSB for dithering
int outputSignalBits;
switch (outputFileFormat & SF_FORMAT_SUBMASK) {
case SF_FORMAT_PCM_24:
outputSignalBits = 24;
break;
case SF_FORMAT_PCM_S8:
case SF_FORMAT_PCM_U8:
outputSignalBits = 8;
break;
case SF_FORMAT_DOUBLE:
outputSignalBits = 53;
break;
case SF_FORMAT_FLOAT:
outputSignalBits = 21;
break;
default:
outputSignalBits = 16;
}
if (ci.quantize) {
outputSignalBits = std::max(1, std::min(ci.quantizeBits, outputSignalBits));
}
// confirm dithering options for user:
if (ci.bDither) {
auto prec = std::cout.precision();
std::cout << "Generating " << std::setprecision(2) << ci.ditherAmount << " bits of " << ditherProfileList[ci.ditherProfileID].name << " dither for " << outputSignalBits << "-bit output format";
std::cout.precision(prec);
if (ci.bAutoBlankingEnabled)
std::cout << ", with auto-blanking";
std::cout << std::endl;
}
// make a vector of ditherers (one ditherer for each channel):
std::vector<Ditherer<FloatType>> ditherers;
ditherers.reserve(static_cast<size_t>(nChannels));
const auto seed = static_cast<int>(ci.bUseSeed ? ci.seed : time(nullptr));
for (int n = 0; n < nChannels; n++) {
ditherers.emplace_back(outputSignalBits, ci.ditherAmount, ci.bAutoBlankingEnabled, n + seed, static_cast<DitherProfileID>(ci.ditherProfileID));
}
// make a vector of Resamplers
std::vector<Converter<FloatType>> converters;
converters.reserve(static_cast<size_t>(nChannels));
for (int n = 0; n < nChannels; n++) {
converters.emplace_back(ci);
}
// Calculate initial gain:
FloatType gain = static_cast<FloatType>(ci.gain) * static_cast<FloatType>(converters[0].getGain()) *
static_cast<FloatType>(ci.bNormalize ? fraction.numerator * (ci.limit / static_cast<double>(peakInputSample)) : fraction.numerator * ci.limit);
// todo: more testing with very low bit depths (eg 4 bits)
if (ci.bDither) { // allow headroom for dithering:
FloatType ditherCompensation =
(pow(2, outputSignalBits - 1) - pow(2, ci.ditherAmount - 1)) / pow(2, outputSignalBits - 1); // eg 32767/32768 = 0.999969 (-0.00027 dB)
gain *= ditherCompensation;
}
const int groupDelay = static_cast<int>(converters[0].getGroupDelay());
const auto tailSize = nChannels * std::ceil(std::max<size_t>(0, groupDelay) / resamplingFactor);
FloatType peakOutputSample;
bool bClippingDetected;
RaiiTimer timer(inputDuration);
int clippingProtectionAttempts = 0;
do { // clipping detection loop (repeats if clipping detected AND not using a temp file)
infile.seek(0, SEEK_SET);
peakInputSample = 0.0;
bClippingDetected = false;
std::unique_ptr<SndfileHandle> outFile;
std::unique_ptr<CsvFile> csvFile;
if (ci.csvOutput) { // csv output
csvFile.reset(new CsvFile(ci.outputFilename));
csvFile->setNumChannels(nChannels);
// defaults
csvFile->setNumericBase(Decimal);
csvFile->setIntegerWriteScalingStyle(ci.integerWriteScalingStyle);
csvFile->setSignedness(Signed);
csvFile->setNumericFormat(Integer);
if (ci.outBitFormat.empty()) { // default = 16-bit, unsigned, integer (decimal)
csvFile->setNumBits(16);
} else {
std::regex rgx("([us]?)(\\d+)([fiox]?)"); // [u|s]<numBits>[f|i|o|x]
std::smatch matchResults;
std::regex_search(ci.outBitFormat, matchResults, rgx);
int numBits = 16;
if (matchResults.length() >= 1 && matchResults[1].compare("u") == 0) {
csvFile->setSignedness(Unsigned);
}
if (matchResults.length() >= 2 && std::stoi(matchResults[2]) != 0) {
numBits = std::min(std::max(1, std::stoi(matchResults[2])), 64); // 1-64 bits
}
if (matchResults.length() >= 3 && !matchResults[3].str().empty()) {
if (matchResults[3].compare("f") == 0) {
csvFile->setNumericFormat(FloatingPoint);
}
else if (matchResults[3].compare("o") == 0) {
csvFile->setNumericBase(Octal);
}
else if (matchResults[3].compare("x") == 0) {
csvFile->setNumericBase(Hexadecimal);
}
}
csvFile->setNumBits(numBits);
// todo: precision, other params
}
} else { // libSndFile output
try {
// output file may need to be overwriten on subsequent passes,
// and the only way to close the file is to destroy the SndfileHandle.
outFile.reset(new SndfileHandle(ci.outputFilename, SFM_WRITE, outputFileFormat, nChannels, ci.outputSampleRate));
if (int e = outFile->error()) {
std::cout << "Error: Couldn't Open Output File (" << sf_error_number(e) << ")" << std::endl;
return false;
}
if (ci.bNoPeakChunk) {
outFile->command(SFC_SET_ADD_PEAK_CHUNK, nullptr, SF_FALSE);
}
if (ci.bWriteMetaData) {
if (!setMetaData(m, *outFile)) {
std::cout << "Warning: problem writing metadata to output file ( " << outFile->strError() << " )" << std::endl;
}
}
// if the minor (sub) format of outputFileFormat is flac, and user has requested a specific compression level, set compression level:
if (((outputFileFormat & SF_FORMAT_FLAC) == SF_FORMAT_FLAC) && ci.bSetFlacCompression) {
std::cout << "setting flac compression level to " << ci.flacCompressionLevel << std::endl;
double cl = ci.flacCompressionLevel / 8.0; // there are 9 flac compression levels from 0-8. Normalize to 0-1.0
outFile->command(SFC_SET_COMPRESSION_LEVEL, &cl, sizeof(cl));
}
// if the minor (sub) format of outputFileFormat is vorbis, and user has requested a specific quality level, set quality level:
if (((outputFileFormat & SF_FORMAT_VORBIS) == SF_FORMAT_VORBIS) && ci.bSetVorbisQuality) {
auto prec = std::cout.precision();
std::cout.precision(1);
std::cout << "setting vorbis quality level to " << ci.vorbisQuality << std::endl;
std::cout.precision(prec);
double cl = (1.0 - ci.vorbisQuality) / 11.0; // Normalize from (-1 to 10), to (1.0 to 0) ... why is it backwards ?
outFile->command(SFC_SET_COMPRESSION_LEVEL, &cl, sizeof(cl));
}
}
catch (std::exception& e) {
std::cout << "Error: Couldn't Open Output File " << e.what() << std::endl;
return false;
}
}
// conditionally open a temp file:
if (ci.bTmpFile) {
tmpSndfileHandle = getTempFile<FloatType>(inputFileFormat, nChannels, ci, tmpFilename);
if (tmpSndfileHandle == nullptr) {
ci.bTmpFile = false;
}
} // ends opening of temp file
// echo conversion mode to user (multi-stage/single-stage, multi-threaded/single-threaded)
const std::string stageness(ci.bMultiStage ? "multi-stage" : "single-stage");
const std::string threadedness(ci.bMultiThreaded ? ", multi-threaded" : "");
std::cout << "Converting (" << stageness << threadedness << ") ..." << std::endl;
peakOutputSample = 0.0;
totalSamplesRead = 0;
const sf_count_t incrementalProgressThreshold = (ci.progressUpdates > 0 ) ? inputSampleCount / ci.progressUpdates : inputSampleCount + 1;
sf_count_t nextProgressThreshold = incrementalProgressThreshold;
int outStartOffset = std::min(groupDelay * nChannels, static_cast<int>(outputBlockSize) - nChannels);
// initialise output (post-conversion) processing
EffectChain<FloatType> outputChain;
outputChain.setOutputBufferSize(outputBlockSize);
outputChain.setChannelCount(nChannels);
outputChain.setTakeOwnership(true);
if(ci.bAdjustStereoWidth && nChannels == 2) {
auto stereoImager = new StereoImager<FloatType>;
std::cout << "adjusting stereo width" << std::endl;
stereoImager->setStereoWidth(ci.stereoWidth);
outputChain.add(stereoImager);
}
if(ci.bFadeIn || ci.bFadeOut) {
auto fadeEffect = new FadeEffect<FloatType>;
fadeEffect->setSampleRate(ci.outputSampleRate);
fadeEffect->setTotalFrames(inputFrames * ci.outputSampleRate / ci.inputSampleRate);
const double shortestPossibleFade = 2.0 / ci.outputSampleRate;
if(ci.bFadeIn && ci.fadeInTime >= shortestPossibleFade) {
std::cout << "fade-in " << ci.fadeInTime << " seconds" << std::endl;
fadeEffect->setFadeIn(ci.fadeInTime);
}
if(ci.bFadeOut && ci.fadeOutTime >= shortestPossibleFade) {
std::cout << "fade-out " << ci.fadeOutTime << " seconds" << std::endl;
fadeEffect->setFadeOut(ci.fadeOutTime);
}
outputChain.add(fadeEffect);
}
const bool hasOutputFX = !outputChain.empty();
// ---
// construct thread pool
ctpl::thread_pool threadPool(nChannels);
struct Result {
size_t outBlockindex;
FloatType peak;
};
std::vector<std::future<Result>> results(nChannels);
bool eof = false;
do { // central conversion loop (the heart of the matter ...)
// Grab a block of interleaved samples from file:
samplesRead = infile.read(inputBlock.data(), inputBlockSize);
if(samplesRead == 0) {
eof = true;
samplesRead = std::min<size_t>(tailSize, inputBlockSize);
std::fill_n(inputBlock.begin(), samplesRead, static_cast<FloatType>(0.0));
}
totalSamplesRead += samplesRead;
// de-interleave into channel buffers
size_t i = 0;
for (size_t s = 0; s < samplesRead; s += nChannels) {
for (int ch = 0; ch < nChannels; ++ch) {
inputChannelBuffers[ch][i] = inputBlock[s + ch];
}
++i;
}
size_t outputBlockIndex = 0;
for (int ch = 0; ch < nChannels; ++ch) { // run convert stage for each channel (concurrently)
auto processingFunc = [&, ch](int) {
FloatType* iBuf = inputChannelBuffers[ch].data();
FloatType* oBuf = outputChannelBuffers[ch].data();
size_t o = 0;
FloatType localPeak = 0.0;
size_t localOutputBlockIndex = 0;
converters[ch].convert(oBuf, o, iBuf, i);
for (size_t f = 0; f < o; ++f) {
// note: disable dither for temp files (dithering to be done in post)
FloatType outputSample = (ci.bDither && !ci.bTmpFile) ? ditherers[ch].dither(gain * oBuf[f]) : gain * oBuf[f]; // gain, dither
localPeak = std::max(localPeak, std::abs(outputSample)); // peak
outputBlock[localOutputBlockIndex + ch] = outputSample; // interleave
localOutputBlockIndex += nChannels;
}
Result res{};
res.outBlockindex = localOutputBlockIndex;
res.peak = localPeak;
return res;
};
if (multiThreaded) {
results[ch] = threadPool.push(processingFunc);
} else {
Result res = processingFunc(0);
peakOutputSample = std::max(peakOutputSample, res.peak);
outputBlockIndex = res.outBlockindex;
}
}
if (multiThreaded) { // collect results:
for (int ch = 0; ch < nChannels; ++ch) {
Result res = results[ch].get();
peakOutputSample = std::max(peakOutputSample, res.peak);
outputBlockIndex = res.outBlockindex;
}
}
// process output (with Group Delay Compensation):
sf_count_t outputSampleCount = outputBlockIndex - outStartOffset;
const FloatType* outputData = hasOutputFX ?
outputChain.process(outputBlock.data(), outputSampleCount) + outStartOffset :
outputBlock.data() + outStartOffset;
// write out to either temp file or outfile
if (ci.bTmpFile) {
tmpSndfileHandle->write(outputData, outputSampleCount);
}
else {
if (ci.csvOutput) {
csvFile->write(outputData, outputSampleCount);
}
else {
outFile->write(outputData, outputSampleCount);
}
}
outStartOffset = 0; // reset after first use
// conditionally send progress update:
if (totalSamplesRead > nextProgressThreshold) {
int progressPercentage = std::min(static_cast<int>(99), static_cast<int>(100 * totalSamplesRead / inputSampleCount));
OutputManager::callProgressFunc(progressPercentage);
nextProgressThreshold += incrementalProgressThreshold;
}
} while (!eof); // ends central conversion loop
if (ci.bTmpFile) {
gain = 1.0; // output file must start with unity gain relative to temp file
} else {
// notify user:
std::cout << "Done" << std::endl;
auto prec = std::cout.precision();
std::cout << "Peak output sample: " << std::setprecision(6) << peakOutputSample << " (" << 20 * log10(peakOutputSample) << " dBFS)" << std::endl;
std::cout.precision(prec);
}
do {
// test for clipping:
if (!ci.disableClippingProtection && peakOutputSample > ci.limit) {
std::cout << "\nClipping detected !" << std::endl;
// calculate gain adjustment
FloatType gainAdjustment = static_cast<FloatType>(clippingTrim) * ci.limit / peakOutputSample;
gain *= gainAdjustment;
// echo gain adjustment to user - use slightly different message if using temp file:
if (ci.bTmpFile) {
std::cout << "Adjusting gain by " << 20 * log10(gainAdjustment) << " dB" << std::endl;
}
else {
std::cout << "Re-doing with " << 20 * log10(gainAdjustment) << " dB gain adjustment" << std::endl;
}
// reset the ditherers
if (ci.bDither) {
for (auto &ditherer : ditherers) {
ditherer.adjustGain(gainAdjustment);
ditherer.reset();
}
}
// reset the converters
for (auto &converter : converters) {
converter.reset();
}
} // ends test for clipping
// if using temp file, write to outFile
if (ci.bTmpFile) {
std::cout << "Writing to output file ...\n";
std::vector<FloatType> outBuf(inputBlockSize, 0);
peakOutputSample = 0.0;
totalSamplesRead = 0;
nextProgressThreshold = incrementalProgressThreshold;
tmpSndfileHandle->seek(0, SEEK_SET);
if (!ci.csvOutput) {
outFile->seek(0, SEEK_SET);
}
do { // Grab a block of interleaved samples from temp file:
samplesRead = tmpSndfileHandle->read(inputBlock.data(), inputBlockSize);
totalSamplesRead += samplesRead;
// de-interleave into channels, apply gain, add dither, and save to output buffer
size_t i = 0;
for (int s = 0; s < samplesRead; s += nChannels) {
for (int ch = 0; ch < nChannels; ++ch) {
FloatType smpl = ci.bDither ? ditherers[ch].dither(gain * inputBlock[i]) :
gain * inputBlock[i];
peakOutputSample = std::max(std::abs(smpl), peakOutputSample);
outBuf[i++] = smpl;
}
}
// write output buffer to outfile
if (ci.csvOutput) {
csvFile->write(outBuf.data(), i);
}
else {
outFile->write(outBuf.data(), i);
}
// conditionally send progress update:
if (totalSamplesRead > nextProgressThreshold) {
int progressPercentage = std::min(static_cast<int>(99),
static_cast<int>(100 * totalSamplesRead / inputSampleCount));
OutputManager::callProgressFunc(progressPercentage);
nextProgressThreshold += incrementalProgressThreshold;
}
} while (samplesRead > 0);
std::cout << "Done" << std::endl;
auto prec = std::cout.precision();
std::cout << "Peak output sample: " << std::setprecision(6) << peakOutputSample << " (" << 20 * log10(peakOutputSample) << " dBFS)" << std::endl;
std::cout.precision(prec);
} // ends if (ci.bTmpFile)
bClippingDetected = peakOutputSample > ci.limit;
if (bClippingDetected)
clippingProtectionAttempts++;
// explanation of 'while' loops:
// 1. when clipping is detected and temp file is in use, go back to re-adjusting gain, resetting ditherers etc and repeat
// 2. when clipping is detected and temp file NOT used, go all the way back to reading the input file, and running the whole conversion again
// (This whole control structure might be better served with good old gotos ...)
} while (ci.bTmpFile && !ci.disableClippingProtection && bClippingDetected && clippingProtectionAttempts < maxClippingProtectionAttempts); // if using temp file, do another round if clipping detected
} while (!ci.bTmpFile && !ci.disableClippingProtection && bClippingDetected && clippingProtectionAttempts < maxClippingProtectionAttempts); // if NOT using temp file, do another round if clipping detected
// clean-up temp file:
delete tmpSndfileHandle; // dealllocate SndFileHandle
#if defined (TEMPFILE_OPEN_METHOD_STD_TMPNAM) || defined (TEMPFILE_OPEN_METHOD_WINAPI)
std::remove(tmpFilename.c_str()); // actually remove the temp file from disk
#endif
return true;
} // ends convert()
// getTempFile() : opens a temp file (wav/rf64 file in floating-point format).
// Double- or single- precision is determined by FloatType.
// Dynamically allocates a SndfileHandle.
// Returns SndfileHandle pointer, which is the caller's responsibility to delete.
// Returns nullptr if unsuccessful.
template<typename FloatType>
SndfileHandle* getTempFile(int inputFileFormat, int nChannels, const ConversionInfo& ci, std::string& tmpFilename) {
SndfileHandle* tmpSndfileHandle = nullptr;
bool tmpFileError;
int outputFileFormat = ci.outputFormat ? ci.outputFormat : inputFileFormat;
// set major format of temp file (inherit rf64-ness from output file):
int tmpFileFormat = (outputFileFormat & SF_FORMAT_RF64) ? SF_FORMAT_RF64 : SF_FORMAT_WAV;