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# bess.rb -- examples from clm-2/bess.cl and clm-2/bess1.cl
#
# Translator: Michael Scholz <mi-scholz@users.sourceforge.net>
# Created: 2002/09/15 22:20:25
# Changed: 2018/01/11 19:58:32
#
# snd-ruby-xm -batch bess.rb -e fm_forever
# or
# snd-ruby-xm bess.rb
require "snd-xm"
class FM_Forever
FMname = "FM Forever!"
FMinfo = "\
bess.rb provides mono real time output to DAC.
Frequency, amplitude, FM index, and C/M ratio
can be controlled via sliders."
def initialize
@freq = 220.0
@amp = 0.5
@fm_index1 = 1.0
@fm_index2 = 0.0
@fm_index3 = 0.0
@cm_ratio1 = 1
@cm_ratio2 = 1
@cm_ratio3 = 1
@low_freq = 40.0
@high_freq = 2000.0
@high_ratio = 10
@high_index1 = 3.0
@high_index2 = 1.0
@high_index3 = 0.25
end
def start_dac(&body)
set_playing(false)
freq = @freq
amp = @amp
index1 = @fm_index1
ratio1 = @cm_ratio1
index2 = @fm_index2
ratio2 = @cm_ratio2
index3 = @fm_index3
ratio3 = @cm_ratio3
s1, s2, s3, s4, s5, s6, s7, s8 = false
reset_cb = lambda do |w, c, i|
set_scale_value(s1.scale, @freq = freq, 100.0)
set_scale_value(s2.scale, @amp = amp, 100.0)
set_scale_value(s3.scale, @fm_index1 = index1, 100.0)
set_scale_value(s4.scale, @cm_ratio1 = ratio1, 100.0)
if s5
set_scale_value(s5.scale, @fm_index2 = index2, 100.0)
set_scale_value(s6.scale, @cm_ratio2 = ratio2, 100.0)
set_scale_value(s7.scale, @fm_index3 = index3, 100.0)
set_scale_value(s8.scale, @cm_ratio3 = ratio3, 100.0)
end
end
help_cb = lambda do |w, c, i| info_dialog(FMname, FMinfo) end
#
# -batch sets XtSetMappedWhenManaged(shell, 0)
# The "Quit Snd" button is only realized if -batch was given.
#
if get_xtvalue(main_widgets[Top_level_shell], RXmNmappedWhenManaged)
clear_cb = false
else
clear_cb = lambda do |w, c, i| exit(0) end
end
d = make_dialog(FMname,
:reset_cb, reset_cb,
:clear_cb, clear_cb,
:help_cb, help_cb) do |w, c, i|
if set_playing(!playing)
play(body)
d.doit_string("Pause")
else
d.doit_string("Play")
end
end
name = "carrier frequency"
s1 = d.add_slider(name, @low_freq, freq, @high_freq, 100) do |w, c, i|
@freq = get_scale_value(w, i, 100.0)
end
name = "amplitude"
s2 = d.add_slider(name, 0, amp, 1, 100) do |w, c, i|
@amp = get_scale_value(w, i, 100.0)
end
name = (@fm_index2 ? "1. " : "") + "fm index"
s3 = d.add_slider(name, 0, index1, @high_index1, 100) do |w, c, i|
@fm_index1 = get_scale_value(w, i, 100.0)
end
name = (@fm_index2 ? "1. " : "") + "c/m ratio"
s4 = d.add_slider(name, 0, ratio1, @high_ratio, 100) do |w, c, i|
@cm_ratio1 = get_scale_value(w, i, 100.0)
end
if @fm_index2
name = "2. fm index"
s5 = d.add_slider(name, 0, index2, @high_index2, 100) do |w, c, i|
@fm_index2 = get_scale_value(w, i, 100.0)
end
name = "2. c/m ratio"
s6 = d.add_slider(name, 0, ratio2, @high_ratio, 100) do |w, c, i|
@cm_ratio2 = get_scale_value(w, i, 100.0)
end
name = "3. fm index"
s7 = d.add_slider(name, 0, index3, @high_index3, 100) do |w, c, i|
@fm_index3 = get_scale_value(w, i, 100.0)
end
name = "3. c/m ratio"
s8 = d.add_slider(name, 0, ratio3, @high_ratio, 100) do |w, c, i|
@cm_ratio3 = get_scale_value(w, i, 100.0)
end
end
if clear_cb
d.clear_string("Quit Snd")
end
d.doit_string("Play")
set_sensitive(d.okay_button, true)
RXtManageChild(d.dialog)
end
def make_fm_forever
@fm_index2 = false
@fm_index3 = false
@car = make_oscil(0.0)
@mod = make_oscil(0.0)
end
def fm_forever
@amp *
oscil(@car, hz2radians(@freq) +
@fm_index1 * oscil(@mod, hz2radians(@cm_ratio1 * @freq)))
end
def make_ffm_forever
@fm_index2 = 0.0
@fm_index3 = 0.0
@car = make_oscil(0.0)
@md1 = make_oscil(0.0)
@md2 = make_oscil(0.0)
@md3 = make_oscil(0.0)
end
def ffm_forever
@amp *
oscil(@car, hz2radians(@freq) +
@fm_index1 * oscil(@md1, hz2radians(@cm_ratio1 * @freq)) +
@fm_index2 * oscil(@md2, hz2radians(@cm_ratio2 * @freq)) +
@fm_index3 * oscil(@md3, hz2radians(@cm_ratio3 * @freq)))
end
end
# test functions
def fm_forever
f = FM_Forever.new
f.make_fm_forever
f.start_dac do f.fm_forever end
end
def ffm_forever
f = FM_Forever.new
f.make_ffm_forever
f.start_dac do f.ffm_forever end
end
# fm_forever
# ffm_forever
# bess.rb ends here
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