83 lines
2.1 KiB
Lua
83 lines
2.1 KiB
Lua
|
ardour {
|
||
|
|
["type"] = "dsp",
|
||
|
|
name = "LTC Reader",
|
||
|
|
category = "Utility",
|
||
|
|
author = "Ardour team",
|
||
|
|
license = "MIT",
|
||
|
|
description = [[Linear Timecode Decoder with mixer strip inline display]]
|
||
|
|
}
|
||
|
|
|
||
|
|
function dsp_ioconfig ()
|
||
|
|
return { { audio_in = 1, audio_out = 1}, }
|
||
|
|
end
|
||
|
|
|
||
|
|
function dsp_init (rate)
|
||
|
|
timeout = rate
|
||
|
|
samplerate = rate
|
||
|
|
ltc_reader = ARDOUR.DSP.LTCReader (rate / 25, ARDOUR.DSP.LTC_TV_STANDARD.LTC_TV_FILM_24)
|
||
|
|
self:shmem():allocate(5)
|
||
|
|
end
|
||
|
|
|
||
|
|
function dsp_run (ins, outs, n_samples)
|
||
|
|
if ins[1] ~= outs[1] then
|
||
|
|
ARDOUR.DSP.copy_vector (outs[1]:offset (0), ins[1]:offset (0), n_samples)
|
||
|
|
end
|
||
|
|
ltc_reader:write (ins[1]:offset (0), n_samples, -1)
|
||
|
|
timeout = timeout + n_samples
|
||
|
|
local to_ui = self:shmem():to_int(0):array()
|
||
|
|
local rv
|
||
|
|
repeat
|
||
|
|
local tc
|
||
|
|
rv, tc = ltc_reader:read (0, 0, 0, 0)
|
||
|
|
if rv then
|
||
|
|
timeout = 0
|
||
|
|
self:shmem():atomic_set_int (0, 1)
|
||
|
|
self:shmem():atomic_set_int (1, tc[1])
|
||
|
|
self:shmem():atomic_set_int (2, tc[2])
|
||
|
|
self:shmem():atomic_set_int (3, tc[3])
|
||
|
|
self:shmem():atomic_set_int (4, tc[4])
|
||
|
|
self:queue_draw ()
|
||
|
|
end
|
||
|
|
until not rv
|
||
|
|
if timeout > samplerate then
|
||
|
|
if 0 ~= self:shmem():atomic_get_int (0) then
|
||
|
|
self:shmem():atomic_set_int (0, 0)
|
||
|
|
self:queue_draw ()
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
-------------------------------------------------------------------------------
|
||
|
|
-- inline UI
|
||
|
|
--
|
||
|
|
local txt = nil -- a pango context
|
||
|
|
local vpadding = 2
|
||
|
|
|
||
|
|
function render_inline (ctx, displaywidth, max_h)
|
||
|
|
if not txt then
|
||
|
|
txt = Cairo.PangoLayout (ctx, "Mono 10px")
|
||
|
|
end
|
||
|
|
|
||
|
|
local d = self:shmem():to_int(0):array()
|
||
|
|
if d[1] == 0 then
|
||
|
|
txt:set_text("--:--:--:--")
|
||
|
|
else
|
||
|
|
txt:set_text(string.format("%02d:%02d:%02d:%02d", d[2], d[3], d[4], d[5]))
|
||
|
|
end
|
||
|
|
|
||
|
|
-- compute the size of the display
|
||
|
|
local txtwidth, lineheight = txt:get_pixel_size()
|
||
|
|
local displayheight = math.min(vpadding + (lineheight + vpadding), max_h)
|
||
|
|
|
||
|
|
-- clear background
|
||
|
|
ctx:rectangle (0, 0, displaywidth, displayheight)
|
||
|
|
ctx:set_source_rgba (.2, .2, .2, 1.0)
|
||
|
|
ctx:fill ()
|
||
|
|
ctx:set_source_rgba (.8, .8, .8, 1.0)
|
||
|
|
ctx:move_to ((displaywidth - txtwidth) / 2, 1)
|
||
|
|
txt:show_in_cairo_context (ctx)
|
||
|
|
|
||
|
|
return {displaywidth, displayheight}
|
||
|
|
end
|
||
|
|
|