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-rwxr-xr-xbindings/python/lv2_apply.py39
1 files changed, 17 insertions, 22 deletions
diff --git a/bindings/python/lv2_apply.py b/bindings/python/lv2_apply.py
index 1cd906d..4c7d9b4 100755
--- a/bindings/python/lv2_apply.py
+++ b/bindings/python/lv2_apply.py
@@ -41,8 +41,8 @@ class WavFile(object):
data = [(i - float(range/2)) / float(range/2) for i in data]
channels = []
- for i in xrange(self.nchannels):
- channels.append([data[j] for j in xrange(0, len(data), self.nchannels) ])
+ for i in range(self.nchannels):
+ channels.append([data[j] for j in range(0, len(data), self.nchannels) ])
return channels
@@ -57,6 +57,7 @@ def main():
# Initialise Lilv
world = lilv.World()
+ ns = world.ns
world.load_all()
plugin_uri = sys.argv[1]
@@ -65,19 +66,14 @@ def main():
# 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)
+ plugins = world.get_all_plugins()
+ if plugin_uri_node not in plugins:
+ print("Unknown plugin `%s'" % 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)
+ plugin = plugins[plugin_uri_node]
+ n_audio_in = plugin.get_num_ports_of_class(ns.lv2.InputPort, ns.lv2.AudioPort)
+ n_audio_out = plugin.get_num_ports_of_class(ns.lv2.OutputPort, ns.lv2.AudioPort)
if n_audio_out == 0:
print("Plugin has no audio outputs\n")
sys.exit(1)
@@ -120,22 +116,21 @@ def main():
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):
+ if port.is_a(ns.lv2.InputPort):
+ if port.is_a(ns.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)))
+ elif port.is_a(ns.lv2.ControlPort):
+ default = float(port.get(ns.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):
+ elif port.is_a(ns.lv2.OutputPort):
+ if port.is_a(ns.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):
+ elif port.is_a(ns.lv2.ControlPort):
control_output_buffers.append(numpy.array([0], numpy.float32))
instance.connect_port(index, control_output_buffers[-1])
else:
@@ -156,7 +151,7 @@ def main():
# 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.writeframes(wave.struct.pack("%u%s" % (len(chunk), wav_in.struct_fmt_code), *chunk.astype(int)))
wav_out.close()