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527 lines
10 KiB
527 lines
10 KiB
6 months ago
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// .scl to sunvox curve3 converter
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// by acheney
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// under mit license
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// NOTE: BE SURE THERE ARE NO DUPLICATE LINE ENDINGS IN YOUR .SCL FILE, OR ELSE THE SCRIPT WILL FAIL!
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// .scl files generated using sevish's scale workshop should work fine, as well as .scl files saved locally on your system
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// but if you download an .scl file from anywhere else, be sure to convert the line endings to those of your os
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// on linux/osx you can use dos2unix, and on windows unix2dos, or for both, any text editor that lets you convert line endings
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// - BEGIN CONFIG -
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// the frequency of the tuning center in hertz
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tuning_center_freq = 440
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// the midi note to use as the tuning center. 57 = A4
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tuning_center_midi = 57
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// enables mapping the tuning to 12 notes
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// the notes will be mapped according to brensenham's line algorithm
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map_to_12_notes = 0
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// if map_to_12_notes is enabled, change the below declaration to your desired mapping
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// the indices of the tuning start at 0
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// the below example is a ten-note tuning mapped to 12 notes
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map_scale = new( 10, 1, INT16 )
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map_scale[ 0 ] = 0
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map_scale[ 1 ] = 1
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map_scale[ 2 ] = 2
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map_scale[ 3 ] = 3
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map_scale[ 4 ] = 4
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map_scale[ 5 ] = 5
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map_scale[ 6 ] = 6
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map_scale[ 7 ] = 7
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map_scale[ 8 ] = 8
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map_scale[ 9 ] = 9
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// - END CONFIG -
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scl_filename = file_dialog( "load .scl file", "scl", "file.scl" )
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scl_name = ""
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scl_size = 0
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scl_list = new( 1024, 1, INT8 )
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scl_pitches = new( 128, 1, INT16 )
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clean( scl_list, 0 )
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clean( scl_pitches, 0 )
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scl_read( scl_filename )
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logf( "name: %s\n", scl_name )
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logf( "size: %d\n", scl_size )
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resize( scl_list, scl_size )
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if (scl_size > 0 ) {
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scl_write( )
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if map_to_12_notes
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{
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scl_pitches = scl_map( map_scale, scl_pitches, scl_size )
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if scl_pitches != -1
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{
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scl_save( scl_name, scl_pitches )
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}
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} else {
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scl_save( scl_name, scl_pitches )
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}
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}
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logf( "\n" )
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show_log()
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fn scl_read( $scl_filename ) {
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$temp_string = new( 1024, 1, INT8 )
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$length = 0
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$metadata_counter = 0
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$list_counter = 0
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$is_comment = 0
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logf( "file to load: %s\n", $scl_filename )
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$scl_file = fopen( $scl_filename, "r" )
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if $scl_file == 0 { ret( -1 ) }
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while 1 {
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$length = fgets( $temp_string, 2048, $scl_file )
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if ( $length == -1 ) {
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break
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}
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if ( $length >= 0 ) {
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// logf( "read string: %s\n", $temp_string )
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if ( $temp_string[ 0 ] == '!' ) {
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$is_comment = 1
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} else {
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$is_comment = 0
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}
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if ( $is_comment == 0 ) {
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if ( $metadata_counter >= 2 ) {
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scl_list[ $list_counter ] = strip_character( $temp_string, ' ' )
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$list_counter = $list_counter + 1
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}
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if ( $metadata_counter == 1 ) {
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$metadata_counter = 2
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if ($length == 0) {
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logf("ERROR: no size specified\n")
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breakall
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} else {
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// logf( "number conversion: %d\n", str_to_num( strip_character( $temp_string, ' ' ) ) )
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scl_size = str_to_num( strip_character( $temp_string, ' ' ) )
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}
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}
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if ( $metadata_counter == 0 ) {
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$metadata_counter = 1
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if ($length == 0) {
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logf("WARNING: no name found. defaulting to filename...\n")
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strcat( scl_name, basename( $scl_filename, 0 ) )
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} else {
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strcat( scl_name, $temp_string )
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}
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}
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} else {
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// logf( "comment found, skipping...\n" )
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}
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}
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}
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remove( $temp_string )
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fclose( $scl_file )
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}
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fn strip_character( $input, $c ) {
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$non_char_count = 0
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$dest = clone( $input )
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$i = 0 while $i < get_xsize( $input ) + 1 {
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if ( $input[ $i ] != $c ) {
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$dest[ $non_char_count ] = $input[ $i ]
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$non_char_count = $non_char_count + 1
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}
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$i = $i + 1
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}
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ret( $dest )
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}
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fn scl_write( ) {
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scl_multipliers = new( scl_size, 1, FLOAT )
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current_midi = 0
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multiplier_power = 1
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i = 0 while i < get_xsize( scl_list ) {
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scl_multiplier = 0
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current_midi = 0
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if ( strstr( scl_list[ i ], "." ) != -1 ) {
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scl_multiplier = pow( 2, ( ( str_to_num( scl_list[ i ] ) / 100 ) / 12 ) )
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} else {
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numerator = new( 256, 1, INT8 )
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clean( numerator, 0 )
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denominator = new( 256, 1, INT8 )
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clean ( denominator, 0 )
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slash_offset = 0
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no_denominator = 0
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j = 0 while 1 {
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if ( scl_list[ i ][ j ] == '/' || scl_list[ i ][ j ] == '\\' ) {
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break
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}
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if ( scl_list[ i ][ j ] == ' ' || scl_list[ i ][ j ] == 0 ) {
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no_denominator = 1
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break
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}
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numerator[ j ] = scl_list[ i ][ j ]
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j = j + 1
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slash_offset = slash_offset + 1
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}
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if ( no_denominator == 0 ) {
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j = 0 while 1 {
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if ( scl_list[ i ][ j + slash_offset + 1 ] == 0 || scl_list[ i ][ j + slash_offset + 1 ] == ' ' ) {
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break;
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}
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denominator[ j ] = scl_list[ i ][ j + slash_offset + 1 ]
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j = j + 1
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}
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} else {
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denominator[ 0 ] = '1'
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}
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scl_multiplier = str_to_num( numerator ) / str_to_num( denominator )
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}
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scl_multipliers[ i ] = scl_multiplier
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// logf( "multiplier written to %d: %f\n", i, scl_multipliers[ i ] )
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i = i + 1
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}
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i = 0 while i < get_xsize( scl_multipliers ) {
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i = i + 1
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}
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i = 0 while i < 128 {
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multiplier_power = floor( ( i - tuning_center_midi ) / scl_size )
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// logf( "multiplier power: %d\n", multiplier_power )
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center_offset = pow( scl_multipliers[ scl_size - 1 ], multiplier_power )
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// logf( "center offset: %d\n", center_offset )
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if ( i < tuning_center_midi ) {
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scl_pitches[ i ] = freq_to_pitch( tuning_center_freq * scl_multipliers[ ( ( ( i - tuning_center_midi ) % scl_size ) - 1 ) + scl_size ] * center_offset )
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}
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if ( i > tuning_center_midi ) {
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scl_pitches[ i ] = freq_to_pitch( tuning_center_freq * scl_multipliers[ ( i - tuning_center_midi ) % ( scl_size ) - 1 ] * center_offset )
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}
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if ( ( tuning_center_midi - i ) % scl_size == 0 ) {
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scl_pitches[ i ] = freq_to_pitch( tuning_center_freq * center_offset )
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}
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// logf( "pitch written to %d: %d\n", i, scl_pitches[ i ] )
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i = i + 1
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}
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}
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fn freq_to_pitch( $freq ) {
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ret( log2( $freq / 16.333984375 ) * 3072 + 16384 )
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}
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fn scl_save( $name, $pitches )
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{
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$name = sanitize( $name )
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// logf( "sanitized filename: %s\n", $name )
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strcat( $name, ".curve16bit" )
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if save( $pitches, $name, FORMAT_RAW ) == 0 { logf( "file saved!\n" ) }
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}
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fn scl_map( $scale, $tuning, $tuning_length )
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{
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$tuning_dest = clone( $tuning )
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$scale_length = get_size( $scale )
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if $scale_length > $tuning_length
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{
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logf( "ERROR: scale length is greater than tuning size\n" )
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ret( -1 )
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}
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if $scale_length > 12
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{
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logf( "ERROR: scale length is greater than 12\n" )
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ret( -1 )
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}
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if $scale[ $scale_length - 1 ] > ( $tuning_length - 1 )
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{
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logf( "ERROR: scale degrees are greater than tuning size\n" )
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ret( -1 )
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}
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$i = 0 while $i < 128 {
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// logf( "i: %d\n", $i )
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$mod_keyboard_index = ( ( $i + 12 ) - ( ( tuning_center_midi ) % 12 ) ) % 12
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// logf( "mod keyboard index: %f\n", $mod_keyboard_index )
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$mod_period = floor( ( $i - ( tuning_center_midi ) ) / 12 )
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// logf( "mod period: %f\n", $mod_period )
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$mod_tuning_index = brensenham( 0, 0, 11, $scale_length - 1 , $mod_keyboard_index )
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// logf( "mod tuning index: %f\n", $mod_tuning_index )
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$mod_scale_index = $scale[ $mod_tuning_index ]
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// logf( "mod scale index: %f\n", $mod_scale_index )
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$mod_tuning_lookup = $mod_scale_index + ( ( $tuning_length ) * $mod_period ) + tuning_center_midi
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// logf( "mod tuning lookup: %f\n", $mod_tuning_lookup )
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$tuning_dest[ $i ] = $tuning[ $mod_tuning_lookup ]
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$i = $i + 1
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}
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ret( $tuning_dest )
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}
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fn sanitize( $input )
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{
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$output = clone( $input )
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i = 0 while i < get_xsize( $input ) {
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if $input[ i ] == '/' { $output[ i ] = '_' }
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if $input[ i ] == '\\' { $output[ i ] = '_' }
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if $input[ i ] == '\'' { $output[ i ] = '_' }
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if $input[ i ] == '\"' { $output[ i ] = '_' }
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if $input[ i ] == '\ ' { $output[ i ] = '_' }
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if $input[ i ] == ':' { $output[ i ] = '_' }
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if $input[ i ] == ',' { $output[ i ] = '_' }
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if $input[ i ] == '.' { $output[ i ] = '_' }
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i = i + 1
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}
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ret( $output )
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}
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fn strrchr( $s, $c )
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{
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$i = 0
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$k = 0
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for( $i = strlen( $s ); $i >= 0; $i - 1 )
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{
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if $s[ $i ] == $c {
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$k = 1
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break
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}
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}
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if $k { ret( $i ) } else { ret( -1 ) }
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}
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fn basename( $p, $x )
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{
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$n = ""
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strcat( $n, 0, $p, strrchr( $p, '/' ) + 1 )
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if $x
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{
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ret( $n )
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} else {
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$nnxl = strrchr( $n, '.' )
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$nnx = new( $nnxl, 1, INT8 )
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$i = 0 while $i < get_size( $nnx )
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{
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$nnx[ $i ] = $n[ $i ]
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$i = $i + 1
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}
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ret( $nnx )
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}
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}
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fn brensenham( $x0, $y0, $x1, $y1, $xi )
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{
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$dx = $x1 - $x0
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$dy = $y1 - $y0
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$d = 2 * $dy - $dx
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$y = $y0
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$x = $x0 while $x < $xi {
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if $d > 0
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{
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$y = $y + 1
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$d = $d - 2 * $dx
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|
|
||
|
}
|
||
|
|
||
|
$d = $d + 2 * $dy
|
||
|
|
||
|
$x = $x + 1
|
||
|
|
||
|
}
|
||
|
|
||
|
ret( $y )
|
||
|
|
||
|
}
|
||
|
|
||
|
fn show_log()
|
||
|
{
|
||
|
|
||
|
$l = get_system_log()
|
||
|
clear()
|
||
|
print( $l, 0, 0, WHITE, CENTER | CENTER )
|
||
|
frame()
|
||
|
remove( $l )
|
||
|
|
||
|
while 1
|
||
|
{
|
||
|
while( get_event() ) { if EVT[ EVT_TYPE ] == EVT_QUIT { halt } }
|
||
|
frame()
|
||
|
}
|
||
|
|
||
|
}
|