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https://github.com/cookiengineer/audacity
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30 lines
1.3 KiB
Plaintext
30 lines
1.3 KiB
Plaintext
(INSTRSAX-FREQ-ALG
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(NAME "sax_freq")
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(ARGUMENTS ("double" "freq") ("sound_type" "breath_env")
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("sound_type" "freq_env") ("rate_type" "sr"))
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(STATE ("struct instr *" "sax" "initInstrument(SAXOFONY, round(sr));
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controlChange(susp->sax, 1, 0.0);")
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("int" "temp_ret_value" "noteOn(susp->sax, freq, 1.0)")
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("float" "breath_scale" "breath_env->scale * SAX_CONTROL_CHANGE_CONST")
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("double" "frequency" "freq"))
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; since sax is a physical model calculated one sample at a time, there is
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; relatively little advantage to inner loop optimization, so always do
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; scaling in the inner loop and do not do interpolation inline. This should
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; generate just one implementation of the fetch function, saving code space.
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(INLINE-INTERPOLATION no)
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(INTERNAL-SCALING breath_env)
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(ALWAYS-SCALE freq_env)
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(START (min breath_env))
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(NOT-IN-INNER-LOOP "temp_ret_value")
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(CONSTANT "frequency" "breath_scale")
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(SAMPLE-RATE "sr")
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(TERMINATE (min breath_env))
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(INNER-LOOP "controlChange(sax, 128, breath_scale * breath_env);
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setFrequency(sax, frequency + freq_env);
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output = (sample_type) tick(sax)")
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(SUPPORT-HEADER "#define SAX_CONTROL_CHANGE_CONST 128\n")
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(SUPPORT-FUNCTIONS "#include \"instr.h\"\n#include \"upsample.h\"\n")
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(FINALIZATION " deleteInstrument(susp->sax);\n")
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)
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