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build_audio.pl
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#!/usr/bin/perl
use Data::Dumper;
my ($input_file_1, $input_file_2, $output_file) = @ARGV;
my $context = {};
initialise_context();
generate_silences();
set_max_length();
set_multiplier();
split_file(1);
split_file(2);
get_combined(1);
get_combined(2);
mix_audio();
cleanup();
sub initialise_context{
$context->{"input_file"}->{"1"} = $input_file_1;
$context->{"input_file"}->{"2"} = $input_file_2;
# 4 voice, gives a 13 ish minute audio
#$context->{"desired_audio_length"} = 786;
# For centred voice, round up length of input audio to 1x
$context->{"desired_audio_length"} = 605;
$context->{"output_base"} = "./out";
$context->{"output_folder"}->{1} = $context->{"output_base"} . "/1";
$context->{"output_folder"}->{2} = $context->{"output_base"} . "/2";
$context->{"binaural_folder"} = "./binaurals";
$context->{"binaural_file_l"} = $context->{"binaural_folder"} . "/theta_l_f_25.wav";
$context->{"binaural_file_r"} = $context->{"binaural_folder"} . "/theta_r_f_25.wav";
$context->{"silence_folder"} = $context->{"output_base"} . "/silence";
# 4 voice
$context->{"gap_silence_length"} = "0.5";
# Centred voice
#$context->{"gap_silence_length"} = "7";
$context->{"intro_silence_length"} = "120";
$context->{"combined_parts_folder"} = $context->{"output_base"} . "/combined";
# level for 4 voice
$context->{"male_voice_track_level"} = "0.25";
# Level for centre voice
#$context->{"male_voice_track_level"} = "0.5";
$context->{"female_voice_track_level"} = "0.4";
$context->{"binaural_track_level"} = "1.0";
$context->{"silence_threshold"} = 0.1;
$context->{"outfile"} = "./$output_file";
}
sub generate_silences{
print "Building silence\n";
my $short_silence_cmd = "sox -n -r 22050 -c 1 " . $context->{"silence_folder"} . "/silence.wav trim 0.0 " . $context->{"gap_silence_length"};
my $intro_silence_cmd = "sox -n -r 22050 -c 1 " . $context->{"silence_folder"} . "/intro_silence.wav trim 0.0 " . $context->{"intro_silence_length"};
`$short_silence_cmd`;
`$intro_silence_cmd`;
}
sub set_max_length{
$context->{"file1_length"} = get_length($context->{"input_file"}->{1});
print "length of file1: " . $context->{"file1_length"} . "\n";
$context->{"file2_length"} = get_length($context->{"input_file"}->{2});
print "length of file2: " . $context->{"file2_length"} . "\n";
if($context->{"file1_length"} > $context->{"file2_length"}){
$context->{"max_audio_length"} = $context->{"file1_length"};
}else{
$context->{"max_audio_length"} = $context->{"file2_length"};
}
print "Max length: " . $context->{"max_audio_length"} . "\n";
}
sub set_multiplier{
$context->{"multiplier"} = $context->{"desired_audio_length"} / $context->{"max_audio_length"};
print "Multiplier: " . $context->{"multiplier"} . "\n";
}
sub split_file{
my ($input_file_number) = @_;
my $input_file = $context->{"input_file"}->{$input_file_number};
my $output_folder = $context->{"output_folder"}->{$input_file_number};
my $silence_threshold = $context->{"silence_threshold"};
my $sox_cmd = "sox $input_file $output_folder/$input_file\_out.wav silence 1 0.2 $silence_threshold\% 1 0.2 $silence_threshold\% : newfile : restart";
print "Sox cmd: $sox_cmd\n";
`$sox_cmd`;
}
sub get_combined{
my ($input_file_number) = @_;
print "tmp_output:" . $context->{"output_folder"}->{$input_file_number} . "\n";
print "Input file:" . $context->{"input_file"}->{$input_file_number} . "\n";
my $split_count_cmd = "ls " . $context->{"output_folder"}->{$input_file_number} . "/*.wav | wc -l";
$context->{"split_count"}->{$input_file_number} = `$split_count_cmd`;
chomp $context->{"split_count"}->{$input_file_number};
print "split_count: " . $context->{"split_count"}->{$input_file_number} . "\n";
#print Dumper $context;
$context->{"number_of_files"} = int((1 / $context->{"multiplier"}) + 0.5);
if($context->{"number_of_files"} eq 0){
$context->{"number_of_files"} = 1;
}
print "number_of_files: " . $context->{"number_of_files"} . "\n";
if($context->{"multiplier"} > 1){
for($j = 0; $j < $context->{"number_of_files"}*2; $j++){
my $output_file_number = $j + 1;
print "Running file number $output_file_number\n";
combine_files($input_file_number, $output_file_number);
}
}else{
print Dumper $context;
$context->{"parts_per_file"} = $context->{"split_count"}->{$input_file_number} / $context->{"number_of_files"};
print "parts_per_file: " . $context->{"parts_per_file"} . "\n";
for($j = 0; $j < $context->{"number_of_files"}; $j++){
my $output_file_number = $j + 1;
print "Running file number $output_file_number\n";
combine_files2($input_file_number, $output_file_number);
}
}
}
sub combine_files{
my ($input_file_number, $output_file_number) = @_;
my $split_count = $context->{"split_count"}->{$input_file_number};
my $part_offset = int((($split_count * $context->{"multiplier"}) * ($output_file_number)) + 0.5);
print "part_offset: $part_offset\n";
my $total_parts = int($split_count * $context->{"multiplier"}) + $part_offset;
print "Total parts: $total_parts\n";
my $input_file = $context->{"input_file"}->{$input_file_number};
my $output_folder = $context->{"output_folder"}->{$input_file_number};
my $combine_cmd = "sox " . $context->{"silence_folder"} . "/intro_silence.wav ";
if($input_file_number eq 1){
for ($i = $part_offset; $i < $total_parts; $i++){
my $part_number = ($i % $split_count) + 1;
$part_number = sprintf("%03d", $part_number);
my $part_file_name = "$output_folder/$input_file\_out$part_number.wav";
$combine_cmd .= "$part_file_name " . $context->{"silence_folder"} . "/silence.wav ";
}
}else{
for ($i = $total_parts; $i > $part_offset; $i--){
my $part_number = ($i % $split_count) + 1;
$part_number = sprintf("%03d", $part_number);
my $part_file_name = "$output_folder/$input_file\_out$part_number.wav";
$combine_cmd .= "$part_file_name " . $context->{"silence_folder"} . "/silence.wav ";
}
}
my $output_file_path = $context->{"combined_parts_folder"} . "/$input_file\_combined\_$output_file_number.wav";
$combine_cmd .= " " . $output_file_path;
$context->{"output_file"}->{$input_file_number}->{$output_file_number} = $output_file_path;
print "combine cmd: $combine_cmd\n";
`$combine_cmd`;
}
sub combine_files2{
my ($input_file_number, $output_file_number) = @_;
my $range_end = $output_file_number * $context->{"parts_per_file"};
my $range_start = $range_end - $context->{"parts_per_file"} + 1;
print "range_start: $range_start\n";
print "range_end: $range_end\n";
my $input_file = $context->{"input_file"}->{$input_file_number};
my $output_folder = $context->{"output_folder"}->{$input_file_number};
my $combine_cmd = "sox " . $context->{"silence_folder"} . "/intro_silence.wav ";
if($input_file_number eq 1){
for ($i = $range_start; $i < $range_end; $i++){
my $part_number = $i;
$part_number = sprintf("%03d", $part_number);
my $part_file_name = "$output_folder/$input_file\_out$part_number.wav";
$combine_cmd .= "$part_file_name " . $context->{"silence_folder"} . "/silence.wav ";
}
}else{
for ($i = $range_end; $i > $range_start; $i--){
my $part_number = $i;
$part_number = sprintf("%03d", $part_number);
my $part_file_name = "$output_folder/$input_file\_out$part_number.wav";
$combine_cmd .= "$part_file_name " . $context->{"silence_folder"} . "/silence.wav ";
}
}
my $output_file_path = $context->{"combined_parts_folder"} . "/$input_file\_combined\_$output_file_number.wav";
$combine_cmd .= " " . $output_file_path;
$context->{"output_file"}->{$input_file_number}->{$output_file_number} = $output_file_path;
print "combine cmd: $combine_cmd\n";
`$combine_cmd`;
}
sub get_length{
my ($file) = @_;
my $sox_cmd = "soxi -D $file";
my $length = `$sox_cmd`;
chomp $length;
return $length;
}
sub mix_audio{
print "Mixing down audio tracks...\n";
my $output_file_1 = $context->{"output_file"}->{1}->{1};
my $output_file_2 = $context->{"output_file"}->{1}->{2};
my $output_file_3 = $context->{"output_file"}->{2}->{1};
my $output_file_4 = $context->{"output_file"}->{2}->{2};
my $binaural_file_l = $context->{"binaural_file_l"};
my $binaural_file_r = $context->{"binaural_file_r"};
my $outfile = $context->{"outfile"};
my $male_voice_track_level = $context->{"male_voice_track_level"};
my $female_voice_track_level = $context->{"female_voice_track_level"};
my $binaural_track_level = $context->{"binaural_track_level"};
my $sox_remix_cmd = "sox -M -v $male_voice_track_level \"$output_file_1\" -v $male_voice_track_level \"$output_file_2\" -v $female_voice_track_level \"$output_file_3\" -v $female_voice_track_level \"$output_file_4\" -v $binaural_track_level \"$binaural_file_l\" -v $binaural_track_level \"$binaural_file_r\" $outfile remix -m 1v1,2v0,3v0.7,4v0.3,5v1,6v0 1v0,2v1,3v0.3,4v0.7,5v0,6v1";
print "remix command: " . $sox_remix_cmd . "\n";
`$sox_remix_cmd`;
}
sub cleanup{
$file_1_part_cleanup_cmd = "rm " . $context->{"output_folder"}->{1} . "/*";
print "Cleanup file 1 parts: $file_1_part_cleanup_cmd\n";
`$file_1_part_cleanup_cmd`;
$file_2_part_cleanup_cmd = "rm " . $context->{"output_folder"}->{2} . "/*";
print "Cleanup file 2 parts: $file_2_part_cleanup_cmd\n";
`$file_2_part_cleanup_cmd`;
$silence_cleanup_cmd = "rm " . $context->{"silence_folder"} . "/*";
print "Silence file cleanup: $silence_cleanup_cmd\n";
`$silence_cleanup_cmd`;
$combined_cleanup_cmd = "rm " . $context->{"combined_parts_folder"} . "/*";
print "Combined file cleanup: $combined_cleanup_cmd\n";
`$combined_cleanup_cmd`;
}