Delete midi_synthesizer.py

midi_synthesizer.py

@@ -1,53 +0,0 @@
-import fluidsynth
-import numpy as np
-
-
-def synthesis(midi_opus, soundfont_path, sample_rate=44100):
-    ticks_per_beat = midi_opus[0]
-    event_list = []
-    for track_idx, track in enumerate(midi_opus[1:]):
-        abs_t = 0
-        for event in track:
-            abs_t += event[1]
-            event_new = [*event]
-            event_new[1] = abs_t
-            event_list.append(event_new)
-    event_list = sorted(event_list, key=lambda e: e[1])
-
-    tempo = int((60 / 120) * 10 ** 6)  # default 120 bpm
-    ss = np.empty((0, 2), dtype=np.int16)
-    fl = fluidsynth.Synth(samplerate=float(sample_rate))
-    sfid = fl.sfload(soundfont_path)
-    last_t = 0
-    for c in range(16):
-        fl.program_select(c, sfid, 128 if c == 9 else 0, 0)
-    for event in event_list:
-        name = event[0]
-        sample_len = int(((event[1] / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate)
-        sample_len -= int(((last_t / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate)
-        last_t = event[1]
-        if sample_len > 0:
-            sample = fl.get_samples(sample_len).reshape(sample_len, 2)
-            ss = np.concatenate([ss, sample])
-        if name == "set_tempo":
-            tempo = event[2]
-        elif name == "patch_change":
-            c, p = event[2:4]
-            fl.program_select(c, sfid, 128 if c == 9 else 0, p)
-        elif name == "control_change":
-            c, cc, v = event[2:5]
-            fl.cc(c, cc, v)
-        elif name == "note_on" and event[3] > 0:
-            c, p, v = event[2:5]
-            fl.noteon(c, p, v)
-        elif name == "note_off" or (name == "note_on" and event[3] == 0):
-            c, p = event[2:4]
-            fl.noteoff(c, p)
-
-    fl.delete()
-    if ss.shape[0] > 0:
-        max_val = np.abs(ss).max()
-        if max_val != 0:
-            ss = (ss / max_val) * np.iinfo(np.int16).max
-    ss = ss.astype(np.int16)
-    return ss