def fill_port_info(plugin, port):
global index
index += 1
# port types
types = [typ.rsplit("#",1)[-1].replace("Port","",1) for typ in get_port_data(port, rdf.type_)]
# unit block
uunit = lilv.lilv_nodes_get_first(port.get_value(units.unit.me))
# contains unit
if "Control" in types and uunit is not None:
uuri = lilv.lilv_node_as_uri(uunit)
# using pre-existing lv2 unit
if uuri is not None and uuri.startswith("http://lv2plug.in/ns/extensions/units#"):
ulabel, urender, usymbol = get_port_unit(uuri.replace("http://lv2plug.in/ns/extensions/units#","",1))
# using custom unit
else:
xlabel = world.find_nodes(uunit, rdfs .label.me, None).get_first()
xrender = world.find_nodes(uunit, units.render.me, None).get_first()
xsymbol = world.find_nodes(uunit, units.symbol.me, None).get_first()
ulabel = xlabel .as_string() if xlabel .me else ""
urender = xrender.as_string() if xrender.me else ""
usymbol = xsymbol.as_string() if xsymbol.me else ""
# no unit
else:
ulabel = ""
urender = ""
usymbol = ""
return {
'index' : index,
'name' : lilv.lilv_node_as_string(port.get_name()),
'symbol': lilv.lilv_node_as_string(port.get_symbol()),
'type' : types,
'range' : {
'default': lilv.lilv_node_as_float(lilv.lilv_nodes_get_first(port.get_value(lv2core.default.me))),
'minimum': lilv.lilv_node_as_float(lilv.lilv_nodes_get_first(port.get_value(lv2core.minimum.me))),
'maximum': lilv.lilv_node_as_float(lilv.lilv_nodes_get_first(port.get_value(lv2core.maximum.me))),
} if ("Control", "Input") == types else {},
'units' : {
'label' : ulabel,
'render': urender,
'symbol': usymbol,
} if "Control" in types and (ulabel or urender or usymbol) else {},
'designation': (get_port_data(port, lv2core.designation) or [None])[0],
'properties' : [typ.rsplit("#",1)[-1] for typ in get_port_data(port, lv2core.portProperty)],
'rangeSteps' : (get_port_data(port, pprops.rangeSteps) or [None])[0],
"scalePoints": [],
}
def generate_psname(self):
portname = self.portname
psname = lilv.lilv_nodes_get_first(
self.port.get_value(self.ns_lv2core.shortName.me)
)
if psname is not None:
psname = lilv.lilv_node_as_string(psname) or ""
if not psname:
psname = self.get_short_port_name(portname)
if len(psname) > Port.SHORT_NAME_SIZE:
self.warnings.append("port '%s' name is too big, reduce the name size or provide a shortName" % portname)
elif len(psname) > Port.SHORT_NAME_SIZE:
psname = psname[:Port.SHORT_NAME_SIZE]
self.register_error("short name has more than %d characters", Port.SHORT_NAME_SIZE)
# check for old style shortName
if self.port.get_value(self.ns_lv2core.shortname.me) is not None:
self.register_error("short name is using old style 'shortname' instead of 'shortName'")
return psname
def main():
# Read command line arguments
if len(sys.argv) != 4:
print('USAGE: lv2_apply.py PLUGIN_URI INPUT_WAV OUTPUT_WAV')
sys.exit(1)
# Initialise Lilv
world = lilv.World()
world.load_all()
plugin_uri = sys.argv[1]
wav_in_path = sys.argv[2]
wav_out_path = sys.argv[3]
# Find plugin
plugin_uri_node = world.new_uri(plugin_uri)
plugin = world.get_all_plugins().get_by_uri(plugin_uri_node)
if not plugin:
print("Unknown plugin `%s'\n" % plugin_uri)
sys.exit(1)
lv2_InputPort = world.new_uri(lilv.LILV_URI_INPUT_PORT)
lv2_OutputPort = world.new_uri(lilv.LILV_URI_OUTPUT_PORT)
lv2_AudioPort = world.new_uri(lilv.LILV_URI_AUDIO_PORT)
lv2_ControlPort = world.new_uri(lilv.LILV_URI_CONTROL_PORT)
lv2_default = world.new_uri("http://lv2plug.in/ns/lv2core#default")
n_audio_in = plugin.get_num_ports_of_class(lv2_InputPort, lv2_AudioPort)
n_audio_out = plugin.get_num_ports_of_class(lv2_OutputPort, lv2_AudioPort)
if n_audio_out == 0:
print("Plugin has no audio outputs\n")
sys.exit(1)
# Open input file
try:
wav_in = WavFile(wav_in_path)
except:
print("Failed to open input `%s'\n" % wav_in_path)
sys.exit(1)
if wav_in.nchannels != n_audio_in:
print("Input has %d channels, but plugin has %d audio inputs\n" % (
wav_in.nchannels, n_audio_in))
sys.exit(1)
# Open output file
wav_out = wave.open(wav_out_path, 'w')
if not wav_out:
print("Failed to open output `%s'\n" % wav_out_path)
sys.exit(1)
# Set output file to same format as input (except possibly nchannels)
wav_out.setparams(wav_in.wav_in.getparams())
wav_out.setnchannels(n_audio_out)
print('%s => %s => %s @ %d Hz'
% (wav_in_path, plugin.get_name(), wav_out_path, wav_in.framerate))
instance = lilv.Instance(plugin, wav_in.framerate)
channels = wav_in.read()
wav_in.close()
# Connect all ports to buffers. NB if we fail to connect any buffer, lilv
# will segfault.
audio_input_buffers = []
audio_output_buffers = []
control_input_buffers = []
control_output_buffers = []
for index in range(plugin.get_num_ports()):
port = plugin.get_port_by_index(index)
if port.is_a(lv2_InputPort):
if port.is_a(lv2_AudioPort):
audio_input_buffers.append(numpy.array(channels[len(audio_input_buffers)], numpy.float32))
instance.connect_port(index, audio_input_buffers[-1])
elif port.is_a(lv2_ControlPort):
#if port.has_property(lv2_default): # Doesn't seem to work
default = lilv.lilv_node_as_float(lilv.lilv_nodes_get_first(port.get_value(lv2_default)))
control_input_buffers.append(numpy.array([default], numpy.float32))
instance.connect_port(index, control_input_buffers[-1])
else:
raise ValueError("Unhandled port type")
elif port.is_a(lv2_OutputPort):
if port.is_a(lv2_AudioPort):
audio_output_buffers.append(numpy.array([0] * wav_in.nframes, numpy.float32))
instance.connect_port(index, audio_output_buffers[-1])
elif port.is_a(lv2_ControlPort):
control_output_buffers.append(numpy.array([0], numpy.float32))
instance.connect_port(index, control_output_buffers[-1])
else:
raise ValueError("Unhandled port type")
# Run the plugin:
instance.run(wav_in.nframes)
# Interleave output buffers:
data = numpy.dstack(audio_output_buffers).flatten()
# Return to original int range:
if wav_in.signed:
data = data * float(wav_in.range / 2)
else:
data = (data + 1) * float(wav_in.range/2)
# Write output file in chunks to stop memory usage getting out of hand:
CHUNK_SIZE = 8192
for chunk in numpy.array_split(data, CHUNK_SIZE):
wav_out.writeframes(wave.struct.pack("%u%s" % (len(chunk), wav_in.struct_fmt_code), *chunk))
wav_out.close()
def fill_port_info(port):
# base data
portname = lilv.lilv_node_as_string(port.get_name()) or ""
if not portname:
portname = "_%i" % index
errors.append("port with index %i has no name" % index)
portsymbol = lilv.lilv_node_as_string(port.get_symbol()) or ""
if not portsymbol:
portsymbol = "_%i" % index
errors.append("port with index %i has no symbol" % index)
# check for duplicate names
if portname in portsymbols:
warnings.append("port name '%s' is not unique" % portname)
else:
portnames.append(portname)
# check for duplicate symbols
if portsymbol in portsymbols:
errors.append("port symbol '%s' is not unique" % portsymbol)
else:
portsymbols.append(portsymbol)
# short name
psname = lilv.lilv_nodes_get_first(port.get_value(ns_lv2core.shortname.me))
if psname is not None:
psname = lilv.lilv_node_as_string(psname) or ""
if not psname:
psname = get_short_port_name(portname)
warnings.append("port '%s' has no short name" % portname)
elif len(psname) > 16:
psname = psname[:16]
errors.append("port '%s' short name has more than 16 characters" % portname)
# port types
types = [typ.rsplit("#",1)[-1].replace("Port","",1) for typ in get_port_data(port, ns_rdf.type_)]
if "Atom" in types \
and port.supports_event(ns_midi.MidiEvent.me) \
and lilv.Nodes(port.get_value(ns_atom.bufferType.me)).get_first() == ns_atom.Sequence:
types.append("MIDI")
# port properties
properties = [typ.rsplit("#",1)[-1] for typ in get_port_data(port, ns_lv2core.portProperty)]
# data
ranges = {}
scalepoints = []
# unit block
ulabel = ""
urender = ""
usymbol = ""
# control and cv must contain ranges, might contain scale points
if "Control" in types or "CV" in types:
isInteger = "integer" in properties
if isInteger and "CV" in types:
errors.append("port '%s' has integer property and CV type" % portname)
xdefault = lilv.lilv_nodes_get_first(port.get_value(ns_lv2core.default.me))
xminimum = lilv.lilv_nodes_get_first(port.get_value(ns_lv2core.minimum.me))
xmaximum = lilv.lilv_nodes_get_first(port.get_value(ns_lv2core.maximum.me))
if xminimum is not None and xmaximum is not None:
if isInteger:
if is_integer(lilv.lilv_node_as_string(xminimum)):
ranges['minimum'] = lilv.lilv_node_as_int(xminimum)
else:
ranges['minimum'] = lilv.lilv_node_as_float(xminimum)
if fmod(ranges['minimum'], 1.0) == 0.0:
warnings.append("port '%s' has integer property but minimum value is float" % portname)
else:
errors.append("port '%s' has integer property but minimum value has non-zero decimals" % portname)
ranges['minimum'] = int(ranges['minimum'])
if is_integer(lilv.lilv_node_as_string(xmaximum)):
ranges['maximum'] = lilv.lilv_node_as_int(xmaximum)
else:
ranges['maximum'] = lilv.lilv_node_as_float(xmaximum)
if fmod(ranges['maximum'], 1.0) == 0.0:
warnings.append("port '%s' has integer property but maximum value is float" % portname)
else:
errors.append("port '%s' has integer property but maximum value has non-zero decimals" % portname)
ranges['maximum'] = int(ranges['maximum'])
else:
ranges['minimum'] = lilv.lilv_node_as_float(xminimum)
ranges['maximum'] = lilv.lilv_node_as_float(xmaximum)
if is_integer(lilv.lilv_node_as_string(xminimum)):
warnings.append("port '%s' minimum value is an integer" % portname)
if is_integer(lilv.lilv_node_as_string(xmaximum)):
warnings.append("port '%s' maximum value is an integer" % portname)
if ranges['minimum'] >= ranges['maximum']:
ranges['maximum'] = ranges['minimum'] + (1 if isInteger else 0.1)
errors.append("port '%s' minimum value is equal or higher than its maximum" % portname)
if xdefault is not None:
if isInteger:
if is_integer(lilv.lilv_node_as_string(xdefault)):
ranges['default'] = lilv.lilv_node_as_int(xdefault)
else:
ranges['default'] = lilv.lilv_node_as_float(xdefault)
if fmod(ranges['default'], 1.0) == 0.0:
warnings.append("port '%s' has integer property but default value is float" % portname)
else:
errors.append("port '%s' has integer property but default value has non-zero decimals" % portname)
ranges['default'] = int(ranges['default'])
else:
ranges['default'] = lilv.lilv_node_as_float(xdefault)
if is_integer(lilv.lilv_node_as_string(xdefault)):
warnings.append("port '%s' default value is an integer" % portname)
testmin = ranges['minimum']
testmax = ranges['maximum']
if "sampleRate" in properties:
testmin *= 48000
testmax *= 48000
if not (testmin <= ranges['default'] <= testmax):
ranges['default'] = ranges['minimum']
errors.append("port '%s' default value is out of bounds" % portname)
else:
ranges['default'] = ranges['minimum']
if "Input" in types:
errors.append("port '%s' is missing default value" % portname)
else:
if isInteger:
ranges['minimum'] = 0
ranges['maximum'] = 1
ranges['default'] = 0
else:
ranges['minimum'] = -1.0 if "CV" in types else 0.0
ranges['maximum'] = 1.0
ranges['default'] = 0.0
if "CV" not in types:
errors.append("port '%s' is missing value ranges" % portname)
nodes = port.get_scale_points()
if nodes is not None:
it = lilv.lilv_scale_points_begin(nodes)
while not lilv.lilv_scale_points_is_end(nodes, it):
sp = lilv.lilv_scale_points_get(nodes, it)
it = lilv.lilv_scale_points_next(nodes, it)
if sp is None:
continue
label = lilv.lilv_scale_point_get_label(sp)
value = lilv.lilv_scale_point_get_value(sp)
if label is None:
errors.append("a port scalepoint is missing its label")
continue
label = lilv.lilv_node_as_string(label) or ""
if not label:
errors.append("a port scalepoint is missing its label")
continue
if value is None:
errors.append("port scalepoint '%s' is missing its value" % label)
continue
if isInteger:
if is_integer(lilv.lilv_node_as_string(value)):
value = lilv.lilv_node_as_int(value)
else:
value = lilv.lilv_node_as_float(value)
if fmod(value, 1.0) == 0.0:
warnings.append("port '%s' has integer property but scalepoint '%s' value is float" % (portname, label))
else:
errors.append("port '%s' has integer property but scalepoint '%s' value has non-zero decimals" % (portname, label))
value = int(value)
else:
if is_integer(lilv.lilv_node_as_string(value)):
warnings.append("port '%s' scalepoint '%s' value is an integer" % (portname, label))
value = lilv.lilv_node_as_float(value)
if ranges['minimum'] <= value <= ranges['maximum']:
scalepoints.append({'label': label, 'value': value})
else:
errors.append(("port scalepoint '%s' has an out-of-bounds value:\n" % label) +
("%d < %d < %d" if isInteger else "%f < %f < %f") % (ranges['minimum'], value, ranges['maximum']))
if "enumeration" in properties and len(scalepoints) <= 1:
errors.append("port '%s' wants to use enumeration but doesn't have enough values" % portname)
properties.remove("enumeration")
# control ports might contain unit
if "Control" in types:
# unit
uunit = lilv.lilv_nodes_get_first(port.get_value(ns_units.unit.me))
if uunit is not None:
uuri = lilv.lilv_node_as_uri(uunit)
# using pre-existing lv2 unit
if uuri is not None and uuri.startswith("http://lv2plug.in/ns/"):
uuri = uuri.replace("http://lv2plug.in/ns/extensions/units#","",1)
alnum = uuri.isalnum()
if not alnum:
errors.append("port '%s' has wrong lv2 unit uri" % portname)
uuri = uuri.rsplit("#",1)[-1].rsplit("/",1)[-1]
ulabel, urender, usymbol = get_port_unit(uuri)
if alnum and not (ulabel and urender and usymbol):
errors.append("port '%s' has unknown lv2 unit (our bug?, data is '%s', '%s', '%s')" % (portname,
ulabel,
urender,
usymbol))
# using custom unit
else:
xlabel = world.find_nodes(uunit, ns_rdfs .label.me, None).get_first()
xrender = world.find_nodes(uunit, ns_units.render.me, None).get_first()
xsymbol = world.find_nodes(uunit, ns_units.symbol.me, None).get_first()
if xlabel.me is not None:
ulabel = xlabel.as_string()
else:
errors.append("port '%s' has custom unit with no label" % portname)
if xrender.me is not None:
urender = xrender.as_string()
else:
errors.append("port '%s' has custom unit with no render" % portname)
if xsymbol.me is not None:
usymbol = xsymbol.as_string()
else:
errors.append("port '%s' has custom unit with no symbol" % portname)
return (types, {
'name' : portname,
'symbol' : portsymbol,
'ranges' : ranges,
'units' : {
'label' : ulabel,
'render': urender,
'symbol': usymbol,
} if "Control" in types and ulabel and urender and usymbol else {},
'designation': (get_port_data(port, ns_lv2core.designation) or [None])[0],
'properties' : properties,
'rangeSteps' : (get_port_data(port, ns_mod.rangeSteps) or get_port_data(port, ns_pprops.rangeSteps) or [None])[0],
"scalePoints": scalepoints,
'shortname' : psname,
})
def get_first_port_node(self, subject):
return lilv.lilv_nodes_get_first(self.port.get_value(subject))
def unit(self, port):
port_value = port.get_value(self.ns_units.unit.me)
return lilv.lilv_nodes_get_first(port_value)
def unit(self, port):
port_value = port.get_value(self.ns_units.unit.me)
return lilv.lilv_nodes_get_first(port_value)
def get_first_port_node(self, subject):
return lilv.lilv_nodes_get_first(self.port.get_value(subject))