Fix most of the time

README.md

@@ -0,0 +1,10 @@
+LV2 plugins:
+- Linux Studio Plugins `lv2-lsp-plugins`
+
+C requirements (headers):
+- lilv `liblilv-0-devel`
+- sndfile `libsndfile-devel`
+
+Python requirements:
+- lilv `python3-lilv` (not on pypi)
+- soundfile `python311-SoundFile`

main.py

@@ -1,11 +1,11 @@
-import lilv, numpy, wave
+import lilv, numpy, time
 import soundfile
-from ctypes import c_float, c_int
+
+CHUNK_SIZE = 128
 
 frames, sample_rate = soundfile.read('a.flac')
 num_frames = len(frames)
 print(f"{sample_rate}Hz | {int(num_frames/sample_rate/60)}:{int(num_frames/sample_rate%60)}")
-print(frames.dtype)
 frames = frames.astype(numpy.float32)
 
 world = lilv.World()
@@ -14,57 +14,66 @@ world.load_all()
 plugins = world.get_all_plugins()
 
 plugin = plugins.get_by_uri("http://lsp-plug.in/plugins/lv2/comp_delay_x2_stereo")
+if plugin is None:
+    print("No plugin comp_delay_x2_stereo")
+    exit()
 
-print(plugin.get_name())
+print("Using:", plugin.get_name())
 
 for i in range(plugin.get_num_ports()):
     port = plugin.get_port(i)
-    print(f"Port {i}: {port.get_name()} = {port.get_range()[0]}")
+    #print(f"Port {i}: {port.get_name()} = {port.get_range()[0]}")
 
 instance = lilv.Instance(plugin, sample_rate)
 
+instance.connect_port(4, numpy.array([1], dtype=numpy.int32)) # while 1 is default it needs to be set as int32 for whatever reason
+
+knob_mode = numpy.array([2], dtype=numpy.float32) # by the way, this can't be put into connect_port, even if just the number is a variable
+instance.connect_port(16, knob_mode)
+
+knob_time = numpy.array([10.0], dtype=numpy.float32) # but this can?????? it can be any of the three
+instance.connect_port(22, knob_time)
+
 output_left = numpy.zeros(num_frames, frames.dtype)
 output_right = numpy.zeros(num_frames, frames.dtype)
 
-input_left_chunk = numpy.zeros(512, frames.dtype)
+input_left_chunk = numpy.zeros(CHUNK_SIZE, frames.dtype)
-input_right_chunk = numpy.zeros(512, frames.dtype)
+input_right_chunk = numpy.zeros(CHUNK_SIZE, frames.dtype)
-output_left_chunk = numpy.zeros(512, frames.dtype)
+output_left_chunk = numpy.zeros(CHUNK_SIZE, frames.dtype)
-output_right_chunk = numpy.zeros(512, frames.dtype)
+output_right_chunk = numpy.zeros(CHUNK_SIZE, frames.dtype)
 
 instance.connect_port(0, input_left_chunk)
 instance.connect_port(1, input_right_chunk)
 instance.connect_port(2, output_left_chunk)
 instance.connect_port(3, output_right_chunk)
 
-mode_left = numpy.array([2], dtype=numpy.int32)
-instance.connect_port(5, mode_left)
-
-time_left = numpy.array([0.0], dtype=numpy.float32)
-instance.connect_port(11, time_left)
-
-mode_right = numpy.array([2], dtype=numpy.int32)
-instance.connect_port(16, mode_right)
-
-time_right = numpy.array([500.0], dtype=numpy.float32)
-instance.connect_port(22, time_right)
-
 instance.activate()
 
-print(f"frames: {num_frames}\n")
+print(f"\nFrames: {num_frames}")
-for start in range(0, num_frames, 512):
+print(f"Chunk size: {CHUNK_SIZE}")
-    end = min(start + 512, num_frames)
+print(f"So {int(numpy.ceil(num_frames/CHUNK_SIZE))} iterations\n")
+
+for start in range(0, num_frames, CHUNK_SIZE):
+    end = min(start + CHUNK_SIZE, num_frames)
     chunk_size = end - start
-    print("\033[F", start, chunk_size, end)
+    print(start, chunk_size, end, "       \033[F")
 
     input_left_chunk[:chunk_size] = frames[start:end, 0]
     input_right_chunk[:chunk_size] = frames[start:end, 1]
+    output_left_chunk.fill(0)
+    output_right_chunk.fill(0)
 
     instance.run(chunk_size)
 
     output_left[start:end] = output_left_chunk[:chunk_size]
     output_right[start:end] = output_right_chunk[:chunk_size]
 
+print("done processing                  ")
 instance.deactivate()
 
 merged = numpy.column_stack((output_left, output_right))
+
+if numpy.allclose(frames, merged, rtol=0.5, atol=0.5):
+    print("Warning: output is identical")
+
 soundfile.write('aoutt.flac', merged, sample_rate)