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livetrax/tools/split_benchmark.lua

92 lines
2.6 KiB
Lua

-- cd gtk2_ardour; ./arlua < ../tools/split_benchmark.lua
-- This script creates some tracks, records noise,
-- and then splits recorded regions on all tracks on every
-- timecode frame (30 regions/sec)
reclen = 30 -- seconds to record
n_tracks = 16 -- number of tracks to create
backend = AudioEngine:set_backend("None (Dummy)", "", "")
backend:set_device_name ("Uniform White Noise")
os.execute('rm -rf /tmp/luabench')
s = create_session ("/tmp/luabench", "luabench", 48000)
assert (s)
s:new_audio_track (1, 2, nil, n_tracks, "", ARDOUR.PresentationInfo.max_order, ARDOUR.TrackMode.Normal, true)
for t in s:get_tracks():iter() do
t:rec_enable_control():set_value(1, PBD.GroupControlDisposition.UseGroup)
end
ARDOUR.LuaAPI.usleep (100000)
s:goto_start()
s:maybe_enable_record()
s:request_roll (ARDOUR.TransportRequestSource.TRS_UI)
ARDOUR.LuaAPI.usleep (1000000 * reclen)
s:request_stop (false, false, ARDOUR.TransportRequestSource.TRS_UI);
for t in s:get_tracks():iter() do
t:rec_enable_control():set_value(0, PBD.GroupControlDisposition.UseGroup)
end
ARDOUR.LuaAPI.usleep (100000)
s:goto_start()
s:save_state("")
function split_at (pos)
local add_undo = false -- keep track if something has changed
Session:begin_reversible_command ("Auto Region Split")
for route in Session:get_tracks():iter() do
local playlist = route:to_track():playlist ()
playlist:to_stateful ():clear_changes ()
for region in playlist:regions_at (pos):iter () do
playlist:split_region (region, ARDOUR.MusicSample (pos, 0))
end
if not Session:add_stateful_diff_command (playlist:to_statefuldestructible ()):empty () then
add_undo = true
end
end
if add_undo then
Session:commit_reversible_command (nil)
else
Session:abort_reversible_command ()
end
end
function count_regions ()
local total = 0
for route in Session:get_tracks():iter() do
total = total + route:to_track():playlist():region_list():size()
end
return total
end
stepsize = Session:samples_per_timecode_frame()
fps = Session:nominal_sample_rate () / stepsize
n_steps = 10
cnt = reclen * fps / n_steps
for x = 2, cnt do
local playhead = Session:transport_sample ()
local t_start = ARDOUR.LuaAPI.monotonic_time ()
for i = 1, n_steps do
split_at (playhead + stepsize * i)
end
local t_end = ARDOUR.LuaAPI.monotonic_time ()
Session:request_locate((playhead + stepsize * n_steps), ARDOUR.LocateTransportDisposition.MustStop, ARDOUR.TransportRequestSource.TRS_UI)
print ("n_regions:", count_regions (), "split operation dT:", (t_end - t_start) / 1000 / n_steps, "ms")
collectgarbage ();
ARDOUR.LuaAPI.usleep(500000)
end
s:save_state("")
close_session()
quit()