midi-composer / app.py
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import argparse
import glob
import os.path
import time
import uuid
import gradio as gr
import numpy as np
import onnxruntime as rt
import tqdm
import json
from huggingface_hub import hf_hub_download
import MIDI
from midi_synthesizer import synthesis
from midi_tokenizer import MIDITokenizer
MAX_SEED = np.iinfo(np.int32).max
in_space = os.getenv("SYSTEM") == "spaces"
def softmax(x, axis):
x_max = np.amax(x, axis=axis, keepdims=True)
exp_x_shifted = np.exp(x - x_max)
return exp_x_shifted / np.sum(exp_x_shifted, axis=axis, keepdims=True)
def sample_top_p_k(probs, p, k, generator=None):
if generator is None:
generator = np.random
probs_idx = np.argsort(-probs, axis=-1)
probs_sort = np.take_along_axis(probs, probs_idx, -1)
probs_sum = np.cumsum(probs_sort, axis=-1)
mask = probs_sum - probs_sort > p
probs_sort[mask] = 0.0
mask = np.zeros(probs_sort.shape[-1])
mask[:k] = 1
probs_sort = probs_sort * mask
probs_sort /= np.sum(probs_sort, axis=-1, keepdims=True)
shape = probs_sort.shape
probs_sort_flat = probs_sort.reshape(-1, shape[-1])
probs_idx_flat = probs_idx.reshape(-1, shape[-1])
next_token = np.stack([generator.choice(idxs, p=pvals) for pvals, idxs in zip(probs_sort_flat, probs_idx_flat)])
next_token = next_token.reshape(*shape[:-1])
return next_token
def generate(model, prompt=None, max_len=512, temp=1.0, top_p=0.98, top_k=20,
disable_patch_change=False, disable_control_change=False, disable_channels=None, generator=None):
if disable_channels is not None:
disable_channels = [tokenizer.parameter_ids["channel"][c] for c in disable_channels]
else:
disable_channels = []
if generator is None:
generator = np.random
max_token_seq = tokenizer.max_token_seq
if prompt is None:
input_tensor = np.full((1, max_token_seq), tokenizer.pad_id, dtype=np.int64)
input_tensor[0, 0] = tokenizer.bos_id # bos
else:
prompt = prompt[:, :max_token_seq]
if prompt.shape[-1] < max_token_seq:
prompt = np.pad(prompt, ((0, 0), (0, max_token_seq - prompt.shape[-1])),
mode="constant", constant_values=tokenizer.pad_id)
input_tensor = prompt
input_tensor = input_tensor[None, :, :]
cur_len = input_tensor.shape[1]
bar = tqdm.tqdm(desc="generating", total=max_len - cur_len, disable=in_space)
with bar:
while cur_len < max_len:
end = False
hidden = model[0].run(None, {'x': input_tensor})[0][:, -1]
next_token_seq = np.empty((1, 0), dtype=np.int64)
event_name = ""
for i in range(max_token_seq):
mask = np.zeros(tokenizer.vocab_size, dtype=np.int64)
if i == 0:
mask_ids = list(tokenizer.event_ids.values()) + [tokenizer.eos_id]
if disable_patch_change:
mask_ids.remove(tokenizer.event_ids["patch_change"])
if disable_control_change:
mask_ids.remove(tokenizer.event_ids["control_change"])
mask[mask_ids] = 1
else:
param_name = tokenizer.events[event_name][i - 1]
mask_ids = tokenizer.parameter_ids[param_name]
if param_name == "channel":
mask_ids = [i for i in mask_ids if i not in disable_channels]
mask[mask_ids] = 1
logits = model[1].run(None, {'x': next_token_seq, "hidden": hidden})[0][:, -1:]
scores = softmax(logits / temp, -1) * mask
sample = sample_top_p_k(scores, top_p, top_k, generator)
if i == 0:
next_token_seq = sample
eid = sample.item()
if eid == tokenizer.eos_id:
end = True
break
event_name = tokenizer.id_events[eid]
else:
next_token_seq = np.concatenate([next_token_seq, sample], axis=1)
if len(tokenizer.events[event_name]) == i:
break
if next_token_seq.shape[1] < max_token_seq:
next_token_seq = np.pad(next_token_seq, ((0, 0), (0, max_token_seq - next_token_seq.shape[-1])),
mode="constant", constant_values=tokenizer.pad_id)
next_token_seq = next_token_seq[None, :, :]
input_tensor = np.concatenate([input_tensor, next_token_seq], axis=1)
cur_len += 1
bar.update(1)
yield next_token_seq.reshape(-1)
if end:
break
def create_msg(name, data):
return {"name": name, "data": data}
def send_msgs(msgs):
return json.dumps(msgs)
def run(model_name, tab, instruments, drum_kit, bpm, mid, midi_events, midi_opt, seed, seed_rand,
gen_events, temp, top_p, top_k, allow_cc):
mid_seq = []
bpm = int(bpm)
gen_events = int(gen_events)
max_len = gen_events
if seed_rand:
seed = np.random.randint(0, MAX_SEED)
generator = np.random.RandomState(seed)
disable_patch_change = False
disable_channels = None
if tab == 0:
i = 0
mid = [[tokenizer.bos_id] + [tokenizer.pad_id] * (tokenizer.max_token_seq - 1)]
if bpm != 0:
mid.append(tokenizer.event2tokens(["set_tempo",0,0,0, bpm]))
patches = {}
if instruments is None:
instruments = []
for instr in instruments:
patches[i] = patch2number[instr]
i = (i + 1) if i != 8 else 10
if drum_kit != "None":
patches[9] = drum_kits2number[drum_kit]
for i, (c, p) in enumerate(patches.items()):
mid.append(tokenizer.event2tokens(["patch_change", 0, 0, i, c, p]))
mid_seq = mid
mid = np.asarray(mid, dtype=np.int64)
if len(instruments) > 0:
disable_patch_change = True
disable_channels = [i for i in range(16) if i not in patches]
elif mid is not None:
eps = 4 if midi_opt else 0
mid = tokenizer.tokenize(MIDI.midi2score(mid), cc_eps=eps, tempo_eps=eps)
mid = np.asarray(mid, dtype=np.int64)
mid = mid[:int(midi_events)]
for token_seq in mid:
mid_seq.append(token_seq.tolist())
max_len += len(mid)
events = [tokenizer.tokens2event(tokens) for tokens in mid_seq]
init_msgs = [create_msg("visualizer_clear", None), create_msg("visualizer_append", events)]
t = time.time() + 1
yield mid_seq, None, None, seed, send_msgs(init_msgs)
model = models[model_name]
midi_generator = generate(model, mid, max_len=max_len, temp=temp, top_p=top_p, top_k=top_k,
disable_patch_change=disable_patch_change, disable_control_change=not allow_cc,
disable_channels=disable_channels, generator=generator)
events = []
for i, token_seq in enumerate(midi_generator):
token_seq = token_seq.tolist()
mid_seq.append(token_seq)
events.append(tokenizer.tokens2event(token_seq))
ct = time.time()
if ct - t > 0.5:
yield mid_seq, None, None, seed, send_msgs([create_msg("visualizer_append", events), create_msg("progress", [i + 1, gen_events])])
t = ct
events = []
mid = tokenizer.detokenize(mid_seq)
with open(f"output.mid", 'wb') as f:
f.write(MIDI.score2midi(mid))
audio = synthesis(MIDI.score2opus(mid), soundfont_path)
events = [tokenizer.tokens2event(tokens) for tokens in mid_seq]
yield mid_seq, "output.mid", (44100, audio), seed, send_msgs([create_msg("visualizer_end", events)])
def cancel_run(mid_seq):
if mid_seq is None:
return None, None, []
mid = tokenizer.detokenize(mid_seq)
with open(f"output.mid", 'wb') as f:
f.write(MIDI.score2midi(mid))
audio = synthesis(MIDI.score2opus(mid), soundfont_path)
events = [tokenizer.tokens2event(tokens) for tokens in mid_seq]
return "output.mid", (44100, audio), send_msgs([create_msg("visualizer_end", events)])
def load_javascript(dir="javascript"):
scripts_list = glob.glob(f"{dir}/*.js")
javascript = ""
for path in scripts_list:
with open(path, "r", encoding="utf8") as jsfile:
javascript += f"\n<!-- {path} --><script>{jsfile.read()}</script>"
template_response_ori = gr.routes.templates.TemplateResponse
def template_response(*args, **kwargs):
res = template_response_ori(*args, **kwargs)
res.body = res.body.replace(
b'</head>', f'{javascript}</head>'.encode("utf8"))
res.init_headers()
return res
gr.routes.templates.TemplateResponse = template_response
def hf_hub_download_retry(repo_id, filename):
print(f"downloading {repo_id} {filename}")
retry = 0
err = None
while retry < 30:
try:
return hf_hub_download(repo_id=repo_id, filename=filename)
except Exception as e:
err = e
retry += 1
if err:
raise err
number2drum_kits = {-1: "None", 0: "Standard", 8: "Room", 16: "Power", 24: "Electric", 25: "TR-808", 32: "Jazz",
40: "Blush", 48: "Orchestra"}
patch2number = {v: k for k, v in MIDI.Number2patch.items()}
drum_kits2number = {v: k for k, v in number2drum_kits.items()}
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--share", action="store_true", default=False, help="share gradio app")
parser.add_argument("--port", type=int, default=7860, help="gradio server port")
parser.add_argument("--max-gen", type=int, default=1024, help="max")
opt = parser.parse_args()
soundfont_path = hf_hub_download_retry(repo_id="skytnt/midi-model", filename="soundfont.sf2")
models_info = {"generic pretrain model": ["skytnt/midi-model", ""],
"j-pop finetune model": ["skytnt/midi-model-ft", "jpop/"],
"touhou finetune model": ["skytnt/midi-model-ft", "touhou/"],
}
models = {}
tokenizer = MIDITokenizer()
providers = ['CUDAExecutionProvider', 'CPUExecutionProvider']
for name, (repo_id, path) in models_info.items():
model_base_path = hf_hub_download_retry(repo_id=repo_id, filename=f"{path}onnx/model_base.onnx")
model_token_path = hf_hub_download_retry(repo_id=repo_id, filename=f"{path}onnx/model_token.onnx")
model_base = rt.InferenceSession(model_base_path, providers=providers)
model_token = rt.InferenceSession(model_token_path, providers=providers)
models[name] = [model_base, model_token]
load_javascript()
app = gr.Blocks()
with app:
gr.Markdown("<h1 style='text-align: center; margin-bottom: 1rem'>Midi Composer</h1>")
gr.Markdown("![Visitors](https://api.visitorbadge.io/api/visitors?path=skytnt.midi-composer&style=flat)\n\n"
"Midi event transformer for music generation\n\n"
"Demo for [SkyTNT/midi-model](https://github.com/SkyTNT/midi-model)\n\n"
"[Open In Colab]"
"(https://colab.research.google.com/github/SkyTNT/midi-model/blob/main/demo.ipynb)"
" for faster running and longer generation\n\n"
"**Update v1.2**: Optimise the tokenizer and dataset"
)
js_msg = gr.Textbox(elem_id="msg_receiver", visible=False)
js_msg.change(None, [js_msg], [], js="""
(msg_json) =>{
let msgs = JSON.parse(msg_json);
executeCallbacks(msgReceiveCallbacks, msgs);
return [];
}
""")
input_model = gr.Dropdown(label="select model", choices=list(models.keys()),
type="value", value=list(models.keys())[0])
tab_select = gr.State(value=0)
with gr.Tabs():
with gr.TabItem("instrument prompt") as tab1:
input_instruments = gr.Dropdown(label="🪗instruments (auto if empty)", choices=list(patch2number.keys()),
multiselect=True, max_choices=15, type="value")
input_drum_kit = gr.Dropdown(label="🥁drum kit", choices=list(drum_kits2number.keys()), type="value",
value="None")
input_bpm = gr.Slider(label="BPM (beats per minute, auto if 0)", minimum=0, maximum=255,
step=1,
value=0)
example1 = gr.Examples([
[[], "None"],
[["Acoustic Grand"], "None"],
[['Acoustic Grand', 'SynthStrings 2', 'SynthStrings 1', 'Pizzicato Strings',
'Pad 2 (warm)', 'Tremolo Strings', 'String Ensemble 1'], "Orchestra"],
[['Trumpet', 'Oboe', 'Trombone', 'String Ensemble 1', 'Clarinet',
'French Horn', 'Pad 4 (choir)', 'Bassoon', 'Flute'], "None"],
[['Flute', 'French Horn', 'Clarinet', 'String Ensemble 2', 'English Horn', 'Bassoon',
'Oboe', 'Pizzicato Strings'], "Orchestra"],
[['Electric Piano 2', 'Lead 5 (charang)', 'Electric Bass(pick)', 'Lead 2 (sawtooth)',
'Pad 1 (new age)', 'Orchestra Hit', 'Cello', 'Electric Guitar(clean)'], "Standard"],
[["Electric Guitar(clean)", "Electric Guitar(muted)", "Overdriven Guitar", "Distortion Guitar",
"Electric Bass(finger)"], "Standard"]
], [input_instruments, input_drum_kit])
with gr.TabItem("midi prompt") as tab2:
input_midi = gr.File(label="input midi", file_types=[".midi", ".mid"], type="binary")
input_midi_events = gr.Slider(label="use first n midi events as prompt", minimum=1, maximum=512,
step=1,
value=128)
input_midi_opt = gr.Checkbox(label="optimise midi", value=True)
example2 = gr.Examples([[file, 128] for file in glob.glob("example/*.mid")],
[input_midi, input_midi_events])
tab1.select(lambda: 0, None, tab_select, queue=False)
tab2.select(lambda: 1, None, tab_select, queue=False)
input_seed = gr.Slider(label="seed", minimum=0, maximum=2 ** 31 - 1,
step=1, value=0)
input_seed_rand = gr.Checkbox(label="random seed", value=True)
input_gen_events = gr.Slider(label="generate max n midi events", minimum=1, maximum=opt.max_gen,
step=1, value=opt.max_gen // 2)
with gr.Accordion("options", open=False):
input_temp = gr.Slider(label="temperature", minimum=0.1, maximum=1.2, step=0.01, value=1)
input_top_p = gr.Slider(label="top p", minimum=0.1, maximum=1, step=0.01, value=0.98)
input_top_k = gr.Slider(label="top k", minimum=1, maximum=128, step=1, value=10)
input_allow_cc = gr.Checkbox(label="allow midi cc event", value=True)
example3 = gr.Examples([[1, 0.98, 20], [1, 0.98, 12]], [input_temp, input_top_p, input_top_k])
run_btn = gr.Button("generate", variant="primary")
stop_btn = gr.Button("stop and output")
output_midi_seq = gr.State()
output_midi_visualizer = gr.HTML(elem_id="midi_visualizer_container")
output_audio = gr.Audio(label="output audio", format="mp3", elem_id="midi_audio")
output_midi = gr.File(label="output midi", file_types=[".mid"])
run_event = run_btn.click(run, [input_model, tab_select, input_instruments, input_drum_kit, input_bpm,
input_midi, input_midi_events, input_midi_opt, input_seed, input_seed_rand,
input_gen_events, input_temp, input_top_p, input_top_k, input_allow_cc],
[output_midi_seq, output_midi, output_audio, input_seed, js_msg],
concurrency_limit=3)
stop_btn.click(cancel_run, [output_midi_seq], [output_midi, output_audio, js_msg], cancels=run_event, queue=False)
app.launch(server_port=opt.port, share=opt.share, inbrowser=True)