diff options
Diffstat (limited to 'bindings/python/lv2_apply.py')
| -rwxr-xr-x | bindings/python/lv2_apply.py | 39 |
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() |