post_processor.py

import pretty_midi
import librosa
import copy
import mido
import configparser
import os
import random
from mergeoggs import merge



def post_process(song_path, midi_path, output_dir):
    song_name = song_path.split("/")[-1]
    song_name = ".".join(song_name.split(".")[0:-1])

    if not os.path.exists(f"{output_dir}/{song_name}"):
        os.makedirs(f"{output_dir}/{song_name}")

    merge(f"{output_dir}/{song_name}/song.ogg", song_path)

    notes = pretty_midi.PrettyMIDI(midi_path)

    output = copy.deepcopy(notes)
    output.instruments = []
    output.instruments.append(pretty_midi.Instrument(0, name="PART GUITAR"))

    note_times = [note.start for note in notes.instruments[0].notes if note.pitch != 78]
    for index,note in enumerate(notes.instruments[0].notes):
        if note.pitch not in [72,73,74,75, 78]:
            continue

        new_pitch = note.pitch
        duration = note.end - note.start
        end = note.start + duration if duration > 0.5 else note.start + 0.1
        new_note = pretty_midi.Note(velocity=100, pitch=new_pitch, start=note.start, end=end)

        # add random note if solo strum
        if note.pitch == 78 and note.start not in note_times:
            extra_note = pretty_midi.Note(velocity=100, pitch=random.randint(72,75), start=note.start, end=end)
            output.instruments[0].notes.append(extra_note)

        output.instruments[0].notes.append(new_note)


    output.write(f"{output_dir}/{song_name}/notes.mid")

    output = mido.MidiFile(f"{output_dir}/{song_name}/notes.mid")
    output.tracks[1].pop(1)
    output.save(f"{output_dir}/{song_name}/notes.mid")

    # write ini file
    config = configparser.ConfigParser()
    config.read('./song.ini')
    config.set("song", "name", song_name.split(" - ")[1])
    config.set("song", "artist", song_name.split(" - ")[0])
    config.set("song", "charter", "Tim and Matthew")

    with open(f"{output_dir}/{song_name}/song.ini", 'w') as configfile:    # save
        config.write(configfile)



# output_dir = "./clonehero"

# # for file in os.listdir("./processed/piano_midi"):
# # song_name = ".".join(file.split(".")[0:-1])
# song_name = "Dire Straits - Sultans of Swing"
# # song_name = "Aerosmith - Same Old Song & Dance"
# print(song_name)

# if not os.path.exists(f"{output_dir}/{song_name}"):
#     os.makedirs(f"{output_dir}/{song_name}")

# # copy over song
# # shutil.copy(f"./processed/audio/{song_name}.ogg", f"{output_dir}/{song_name}/song.ogg")
# shutil.copy(f"./{song_name}.ogg", f"{output_dir}/{song_name}/song.ogg")

# # notes = pretty_midi.PrettyMIDI(f"./processed/piano_midi/{file}")
# notes = pretty_midi.PrettyMIDI(f"./sultans_ada.mid")
# # notes = pretty_midi.PrettyMIDI(f"./{song_name}.mid")

# output = copy.deepcopy(notes)
# output.instruments = []
# output.instruments.append(pretty_midi.Instrument(0, name="PART GUITAR"))
# last_start = 0

# note_times = [note.start for note in notes.instruments[0].notes if note.pitch != 78]

# total = 0
# outofrange = 0
# for index,note in enumerate(notes.instruments[0].notes):
#     time_start = note.start
#     # if time_start == last_start:
#     #     continue
#     # if index % 2 != 0:
#     #     continue
#     total+=1
#     if note.pitch not in [71,72,73,74,75, 78]:
#         outofrange+=1
#     last_start = time_start
#     # new_pitch = 71 + note.pitch % 5
#     new_pitch = note.pitch
#     duration = note.end - note.start
#     end = note.start + duration if duration > 0.5 else note.start + 0.1
#     new_note = pretty_midi.Note(velocity=100, pitch=new_pitch, start=note.start, end=end)

#     # if strum
#     if note.pitch == 78 and note.start not in note_times:
#         extra_note = pretty_midi.Note(velocity=100, pitch=random.randint(71,75), start=note.start, end=end)
#         output.instruments[0].notes.append(extra_note)
#     # strum = pretty_midi.Note(velocity=100, pitch=78, start=note.start, end=end)
#     output.instruments[0].notes.append(new_note)
#     # output.instruments[0].notes.append(strum)

# print(f"Total notes: {total}")
# print(f"Out of range notes: {outofrange}")

# output.write(f"{output_dir}/{song_name}/notes.mid")

# output = mido.MidiFile(f"{output_dir}/{song_name}/notes.mid")
# output.tracks[1].pop(1)
# output.save(f"{output_dir}/{song_name}/notes.mid")

# # write ini file
# config = configparser.ConfigParser()
# config.read('./song.ini')
# config.set("song", "name", song_name.split(" - ")[1])
# config.set("song", "artist", song_name.split(" - ")[0])
# config.set("song", "charter", "Tim and Matthew")

# with open(f"{output_dir}/{song_name}/song.ini", 'w') as configfile:    # save
#     config.write(configfile)