From 615fc67d16c642c2abb5114a1096db798cc6d759 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Mon, 16 May 2011 19:03:14 +0000
Subject: Actually rename `swig' directory `bindings'...

git-svn-id: http://svn.drobilla.net/lad/trunk/lilv@3268 a436a847-0d15-0410-975c-d299462d15a1
---
 bindings/python/lv2_apply.py | 96 ++++++++++++++++++++++++++++++++++++++++++++
 bindings/python/lv2_list.py  |  9 +++++
 2 files changed, 105 insertions(+)
 create mode 100755 bindings/python/lv2_apply.py
 create mode 100755 bindings/python/lv2_list.py

(limited to 'bindings/python')

diff --git a/bindings/python/lv2_apply.py b/bindings/python/lv2_apply.py
new file mode 100755
index 0000000..ebb43e5
--- /dev/null
+++ b/bindings/python/lv2_apply.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import math
+import lilv
+import sys
+import wave
+import numpy
+
+# 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   = world.new_uri(sys.argv[1])
+wav_in_path  = sys.argv[2]
+wav_out_path = sys.argv[3]
+
+
+# Find plugin
+plugin = world.get_all_plugins().get_by_uri(plugin_uri)
+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)
+
+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
+wav_in = wave.open(wav_in_path, 'r')
+if not wav_in:
+    print "Failed to open input `%s'\n" % wav_in_path
+    sys.exit(1)
+if wav_in.getnchannels() != n_audio_in:
+    print "Input has %d channels, but plugin has %d audio inputs\n" % (
+        wav_in.getnchannels(), 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.getparams())
+wav_out.setnchannels(n_audio_out)
+
+rate    = wav_in.getframerate()
+nframes = wav_in.getnframes()
+
+# Instantiate plugin
+instance = lilv.Instance(plugin, rate)
+
+def read_float(wf, nframes):
+    wav = wf.readframes(nframes)
+    if wf.getsampwidth() == 4:
+        wav = wave.struct.unpack("<%ul" % (len(wav) / 4), wav)
+        wav = [ i / float(math.pow(2, 32)) for i in wav ]
+    elif wf.getsampwidth() == 2:
+        wav = wave.struct.unpack("<%uh" % (len(wav) / 2), wav)
+        wav = [ i / float(math.pow(2, 16)) for i in wav ]
+    else:
+        wav = wave.struct.unpack("%uB"  % (len(wav)),     wav)
+        wav = [ s - 128 for s in wav ]
+        wav = [ i / float(math.pow(2, 8)) for i in wav ]
+
+    n_channels = wf.getnchannels()
+    wavs       = []
+    if n_channels > 1:
+        for i in xrange(n_channels):
+            wavs.append([ wav[j] for j in xrange(0, len(wav), n_channels) ])
+    else:
+        wavs = [ wav ]
+
+    return wavs
+
+in_buf = read_float(wav_in, nframes)
+
+# TODO: buffer marshaling
+#instance.connect_port(3, in_buf)
+
+print '%s => %s => %s @ %d Hz' % (wav_in_path, plugin.get_name(), wav_out_path, rate)
+
+instance.connect_port(3, in_buf)
diff --git a/bindings/python/lv2_list.py b/bindings/python/lv2_list.py
new file mode 100755
index 0000000..babe1b4
--- /dev/null
+++ b/bindings/python/lv2_list.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python
+
+import lilv
+
+world = lilv.World()
+world.load_all()
+
+for i in world.get_all_plugins():
+    print(i.get_uri())
-- 
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