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526 lines
10 KiB
526 lines
10 KiB
// .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 * $dx |
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} |
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$d = $d + 2 * $dy |
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$x = $x + 1 |
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} |
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ret( $y ) |
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} |
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fn show_log() |
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{ |
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$l = get_system_log() |
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clear() |
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print( $l, 0, 0, WHITE, CENTER | CENTER ) |
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frame() |
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remove( $l ) |
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while 1 |
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{ |
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while( get_event() ) { if EVT[ EVT_TYPE ] == EVT_QUIT { halt } } |
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frame() |
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} |
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}
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