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Diffstat (limited to 'tests/examplefiles/test.csd')
| -rw-r--r-- | tests/examplefiles/test.csd | 264 |
1 files changed, 11 insertions, 253 deletions
diff --git a/tests/examplefiles/test.csd b/tests/examplefiles/test.csd index 9122309b..6512d99e 100644 --- a/tests/examplefiles/test.csd +++ b/tests/examplefiles/test.csd @@ -1,260 +1,18 @@ +/* + * comment + */ +; comment +// comment +/ <CsoundSynthesizer> <CsInstruments> -// This is a Csound orchestra file for testing a Pygments <http://pygments.org> -// lexer. Csound single-line comments can be preceded by a pair of forward -// slashes... -; ...or a semicolon. - -/* Block comments begin with /* and end with */ - -// Orchestras begin with a header of audio parameters. -nchnls = 1 -nchnls_i = 1 -sr = 44100 0dbfs = 1 -ksmps = 10 - -// The control rate kr = sr / ksmps can be omitted when the number of audio -// samples in a control period (ksmps) is set, but kr may appear in older -// orchestras. -kr = 4410 - -// Orchestras contain instruments. These begin with the keyword instr followed -// by a comma-separated list of numbers or names of the instrument. Instruments -// end at the endin keyword and cannot be nested. -instr 1, N_a_M_e_, +Name - // Instruments contain statements. Here is a typical statement: - aSignal oscil 0dbfs, 440, 1 - // Statements are terminated with a newline (possibly preceded by a comment). - // To write a statement on several lines, precede the newline with a - // backslash. - prints \ - "hello, world\n";comment - - // Csound 6 introduced function syntax for opcodes with one or zero outputs. - // The oscil statement above is the same as - aSignal = oscil(0dbfs, 440, 1) - - // Instruments can contain control structures. - kNote = p3 - if (kNote == 0) then - kFrequency = 220 - elseif kNote == 1 then // Parentheses around binary expressions are optional. - kFrequency = 440 - endif - - // Csound 6 introduced looping structures. - iIndex = 0 - while iIndex < 5 do - print iIndex - iIndex += 1 - od - iIndex = 0 - until iIndex >= 5 do - print iIndex - iIndex += 1 - enduntil - // Both kinds of loops can be terminated by either od or enduntil. - - // Single-line strings are enclosed in double-quotes. - prints "string\\\r\n\t\"" - // Multi-line strings are enclosed in pairs of curly braces. - prints {{ - hello, - - world - }} - - // Instruments often end with a statement containing an output opcode. - outc aSignal -endin - -// Orchestras can also contain user-defined opcodes (UDOs). Here is an -// oscillator with one audio-rate output and two control-rate inputs: -opcode anOscillator, a, kk - kAmplitude, kFrequency xin - aSignal vco2 kAmplitude, kFrequency - xout aSignal -endop -instr TestOscillator - outc(anOscillator(0dbfs, 110)) -endin - -// Python can be executed in Csound -// <http://www.csounds.com/manual/html/pyrun.html>. So can Lua -// <http://www.csounds.com/manual/html/lua.html>. -pyruni {{ -import random - -pool = [(1 + i / 10.0) ** 1.2 for i in range(100)] - -def get_number_from_pool(n, p): - if random.random() < p: - i = int(random.random() * len(pool)) - pool[i] = n - return random.choice(pool) -}} - -// The Csound preprocessor supports conditional compilation and including files. -#ifdef DEBUG -#undef DEBUG -#include "filename.orc" -#endif - -// The preprocessor also supports object- and function-like macros. This is an -// object-like macro that defines a number: -#define A_HZ #440# - -// This is a function-like macro: -#define OSCIL_MACRO(VOLUME'FREQUENCY'TABLE) #oscil $VOLUME, $FREQUENCY, $TABLE# - -// Bodies of macros are enclosed in # and can contain newlines. The arguments of -// function-like macros are separated by single-quotes. Uses of macros are -// prefixed with a dollar sign. -instr TestMacro - aSignal $OSCIL_MACRO(1'$A_HZ'1) - // Not unlike PHP, macros expand in double-quoted strings. - prints "The frequency of the oscillator is $A_HZ Hz.\n" - out aSignal -endin - -// Here are other things to note about Csound. - -// There are two bitwise NOT operators, ~ and ¬ (U+00AC). The latter is common -// on keyboards in the United Kingdom -// <https://en.wikipedia.org/wiki/British_and_American_keyboards>. -instr TestBitwiseNOT - print ~42 - print ¬42 -endin - -// Csound uses # for bitwise XOR, which the Csound manual calls bitwise -// non-equivalence <http://www.csounds.com/manual/html/opnonequiv.html>. -instr TestBitwiseXOR - print 0 # 0 - print 0 # 1 - print 1 # 0 - print 1 # 1 -endin - -// Loops and if-then statements are relatively recent additions to Csound. There -// are many flow-control opcodes that involve goto and labels. -instr TestGoto - // This... - if p3 > 0 goto if_label - goto else_label -if_label: - prints "if branch\n" - goto endif_label -else_label: - prints "else branch\n" -endif_label: - - // ...is the same as this. - if p3 > 0 then - prints "if branch\n" - else - prints "else branch\n" - endif - - // This... - iIndex = 0 -loop_label: - print iIndex - iIndex += 1 - if iIndex < 10 goto loop_label - - // ...is the same as this... - iIndex = 0 -loop_lt_label: - print iIndex - loop_lt iIndex, 1, 10, loop_lt_label - - // ...and this. - iIndex = 0 - while iIndex < 10 do - print iIndex - iIndex += 1 - od -endin - -// The prints and printks opcodes -// <https://github.com/csound/csound/blob/develop/OOps/ugrw1.c#L831>, arguably -// the primary methods of logging output, treat certain sequences of characters -// different from printf in C. -instr TestPrints - // ^ prints an ESCAPE character (U+001B), not a CIRCUMFLEX ACCENT character - // (U+005E). ^^ prints a CIRCUMFLEX ACCENT. - prints "^^\n" - // ~ prints an ESCAPE character (U+001B) followed by a [, not a TILDE - // character (U+007E). ~~ prints a TILDE. - prints "~~\n" - // \A, \B, \N, \R, and \T correspond to the escaped lowercase characters (that - // is, BELL (U+0007), BACKSPACE (U+0008), new line (U+000A), CARRIAGE RETURN - // (U+000D), and tab (U+0009)). - prints "\T\R\N" - // %n, %r, and %t are the same as \n, \r, and \t, as are %N, %R, and %T. - prints "%t%r%n" - // %! prints a semicolon. This is a hold-over from old versions of Csound that - // allowed comments to begin in strings. - prints "; %!\n" -endin - -// The arguments of function-like macros can be separated by # instead of '. -// These two lines define the same macro. -#define OSCIL_MACRO(VOLUME'FREQUENCY'TABLE) #oscil $VOLUME, $FREQUENCY, $TABLE# -#define OSCIL_MACRO(VOLUME#FREQUENCY#TABLE) #oscil $VOLUME, $FREQUENCY, $TABLE# - -// Uses of macros can optionally be suffixed with a period. -instr TestMacroPeriodSuffix - aSignal $OSCIL_MACRO.(1'$A_HZ'1) - prints "The frequency of the oscillator is $A_HZ.Hz.\n" - out aSignal -endin - -// Csound has @ and @@ operator-like macros that, when followed by a literal -// non-negative integer, expand to the next power of 2 and the next power of 2 -// plus 1: -// @x = 2^(ceil(log2(x + 1))), x >= 0 -// @@0 = 2 -// @@x = 2^(ceil(log2(x))) + 1, x > 0 -// These macros are in -// <https://github.com/csound/csound/blob/develop/Engine/csound_orc.l#L542> (and -// <https://github.com/csound/csound/blob/develop/Engine/csound_sco.lex#L202>) -// and are described at <http://www.csounds.com/manual/html/ScoreEval.html>. -instr TestAt - prints "%d %2d %2d\n", 0, @0, @@0 - prints "%d %2d %2d\n", 1, @1, @@1 - prints "%d %2d %2d\n", 2, @2, @@2 - prints "%d %2d %2d\n", 3, @3, @@3 - prints "%d %2d %2d\n", 4, @4, @@4 - prints "%d %2d %2d\n", 5, @5, @@5 - prints "%d %2d %2d\n", 6, @6, @@6 - prints "%d %2d %2d\n", 7, @7, @@7 - prints "%d %2d %2d\n", 8, @8, @@8 - prints "%d %2d %2d\n", 9, @9, @@9 -endin - -// Including newlines in macros can lead to confusing code, but it tests the -// lexer. -instr MacroAbuse - if 1 == 1 then - prints "on\n" -#define FOO# -BAR -#endif // This ends the if statement. It is not a preprocessor directive. -endin +prints "hello, world\n" </CsInstruments> <CsScore> -f 1 0 16384 10 1 -i "N_a_M_e_" 0 2 -i "TestOscillator" 2 2 -i "TestBitwiseNOT" 0 1 -i "TestBitwiseXOR" 0 1 -i "TestGoto" 0 1 -i "TestMacroPeriodSuffix" 4 1 -i "TestAt" 0 1 -i "MacroAbuse" 0 1 -e +i 1 0 0 </CsScore> +<html> +<!DOCTYPE html> +</html> </CsoundSynthesizer> |