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// This file is part of VLevel, a dynamic volume normalizer.
//
// Copyright 2003 Tom Felker <tcfelker@mtco.com>
//
// This library 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.
//
// This library 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 this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// vlevel-bin.cpp - the vlevel-bin command, uses VolumeLeveler
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <stdio.h>
#include <limits.h>
#include <assert.h>
#include "../volumeleveler/volumeleveler.h"
#include "commandline.h"
using namespace std;
void LevelRaw(istream &in, ostream& out, VolumeLeveler &vl, unsigned int bits_per_value);
void Help();
void LevelRaw(FILE *in, FILE *out, VolumeLeveler &vl, unsigned int bits_per_value)
{
assert(bits_per_value % 8 == 0);
// figure out the size of things
size_t samples = vl.GetSamples();
size_t channels = vl.GetChannels();
size_t values = samples * channels;
size_t bytes_per_value = bits_per_value / 8;
size_t bytes = values * bytes_per_value;
size_t s, ch; // VC++ 5.0's scoping rules are wrong, oh well.
// allocate our interleaved buffers
char *raw_buf = new char[bytes];
value_t *raw_value_buf = new value_t[values];
// allocate our per-channel buffers
value_t **bufs = new value_t*[channels];
for(ch = 0; ch < channels; ++ch)
bufs[ch] = new value_t[samples];
// how much data in the buffer is good
size_t good_values, good_samples;
// how much from the front of the buffer should be ignored
size_t silence_values, silence_samples;
while(!ferror(in) && !feof(in)) {
// read and convert to value_t
good_values = fread(raw_buf, bytes_per_value, values, in);
good_samples = good_values / channels;
ToValues(raw_buf, raw_value_buf, good_values, bits_per_value, true);
// de-interleave the data
for(size_t s = 0; s < good_samples; ++s)
for(size_t ch = 0; ch < channels; ++ch)
bufs[ch][s] = raw_value_buf[s * channels + ch];
// do the exchange
silence_samples = vl.Exchange(bufs, bufs, good_samples);
silence_values = silence_samples * channels;
good_samples -= silence_samples;
good_values -= silence_values;
// interleave the data
for(s = silence_samples; s < silence_samples + good_samples; ++s)
for(size_t ch = 0; ch < channels; ++ch)
raw_value_buf[s * channels + ch] = bufs[ch][s];
// write the data
FromValues(&raw_value_buf[silence_values], raw_buf, good_values, bits_per_value, true);
fwrite(raw_buf, bytes_per_value, good_values, out);
}
// silence the data
for(s = 0; s < samples; ++s)
for(size_t ch = 0; ch < channels; ++ch)
bufs[ch][s] = 0;
// exchange the data,
silence_samples = vl.Exchange(bufs, bufs, samples);
silence_values = silence_samples * channels;
// good_samples = samples - silence_samples;
good_values = values - silence_values;
//interlace
for(s = silence_samples; s < samples; ++s)
for(size_t ch = 0; ch < channels; ++ch)
raw_value_buf[s * channels + ch] = bufs[ch][s];
FromValues(&raw_value_buf[silence_values], raw_buf, good_values, bits_per_value, true);
fwrite(raw_buf, bytes_per_value, good_values, out);
delete [] raw_buf;
delete [] raw_value_buf;
for(ch = 0; ch < channels; ++ch)
delete [] bufs[ch];
delete [] bufs;
}
void Help(const char *program)
{
cerr << "VLevel v" << VLEVEL_VERSION << endl
<< endl
<< "usage:" << endl
<< "\t" << program << " [options] < infile.cdda > outfile.cdda" << endl
<< endl
<< "options: (abbreviations also work)" << endl
<< "\t--length num" << endl
<< "\t\tSets the buffer to num samples long" << endl
<< "\t\tDefault is 132300 (three seconds at 44.1kHz)" << endl
<< "\t--channels num" << endl
<< "\t\tEach sample has num channels" << endl
<< "\t\tDefault is 2" << endl
<< "\t--strength num" << endl
<< "\t\tEffect strength, 1 is max, 0 is no effect." << endl
<< "\t\tDefault is .8" << endl
<< "\t--max-multiplier num" << endl
<< "\t\tSets the maximum amount a sample will be multiplied" << endl
<< "\t\tDefault is 20" << endl
<< "\t--undo" << endl
<< "\t\tReverses the effect of a previous VLevel" << endl;
}
int main(int argc, char *argv[])
{
CommandLine cmd(argc, argv);
size_t length = 3 * 44100;
size_t channels = 2;
value_t strength = .8, max_multiplier = 20;
bool undo = false;
string option, argument;
while(option = cmd.GetOption(), !option.empty()) {
if(option == "length" || option == "l") {
if((istringstream(cmd.GetArgument()) >> length).fail()) {
cerr << cmd.GetProgramName() << ": bad or no option for --length" << endl;
return 2;
}
if(length < 2) {
cerr << cmd.GetProgramName() << ": --length must be greater than 1" << endl;
return 2;
}
} else if(option == "channels" || option == "c") {
if((istringstream(cmd.GetArgument()) >> channels).fail()) {
cerr << cmd.GetProgramName() << ": bad or no option for --channels" << endl;
return 2;
}
if(channels < 1) {
cerr << cmd.GetProgramName() << ": --channels must be greater than 0" << endl;
return 2;
}
} else if(option == "strength" || option == "s") {
if((istringstream(cmd.GetArgument()) >> strength).fail()) {
cerr << cmd.GetProgramName() << ": bad or no option for --strength" << endl;
return 2;
}
if(strength < 0 || strength > 1) {
cerr << cmd.GetProgramName() << ": --strength must be between 0 and 1 inclusive." << endl;
return 2;
}
} else if(option == "max-multiplier" || option == "m") {
if((istringstream(cmd.GetArgument()) >> max_multiplier).fail()) {
cerr << cmd.GetProgramName() << ": bad or no option for --max-multiplier" << endl
<< cmd.GetProgramName() << ": for no max multiplier, give a negative number" << endl;
return 2;
}
} else if(option == "undo" || option == "u") {
undo = true;
} else if(option == "help" || option == "h") {
Help(argv[0]);
return 0;
} else {
cerr << cmd.GetProgramName() << ": unrecognized option " << option << endl;
Help(argv[0]);
return 2;
}
}
// This works, see docs/technical.txt
if(undo) strength = strength / (strength - 1);
cerr << "Beginning VLevel with:" << endl
<< "length: " << length << endl
<< "channels: " << channels << endl
<< "strength: " << strength << endl
<< "max_multiplier: " << max_multiplier << endl;
FILE *in = stdin;
FILE *out = stdout;
argument = cmd.GetArgument();
if(!argument.empty() && argument != "-") {
in = fopen(argument.c_str(), "rb");
if(!in) {
cerr << "Couldn't open input file '" << argument << "'.\n" << endl;
return 2;
}
}
argument = cmd.GetArgument();
if(!argument.empty() && argument != "-") {
out = fopen(argument.c_str(), "wb");
if(!in) {
cerr << "Couldn't open output file '" << argument << "'.\n" << endl;
return 2;
}
}
VolumeLeveler l(length, channels, strength, max_multiplier);
LevelRaw(in, out, l, 16);
return 0;
}
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