import argparse import glob import os import os.path from sys import exit import shutil import gradio as gr import numpy as np import onnxruntime as rt import PIL import PIL.ImageColor import tqdm from huggingface_hub import hf_hub_download import MIDI from midi_synthesizer import synthesis from midi_tokenizer import MIDITokenizer 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): 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([np.random.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(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): if disable_channels is not None: disable_channels = [tokenizer.parameter_ids["channel"][c] for c in disable_channels] else: disable_channels = [] 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_base.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_token.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) 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 run(tab, instruments, drum_kit, mid, midi_events, gen_events, temp, top_p, top_k, allow_cc): mid_seq = [] max_len = int(gen_events) img_len = 1024 img = np.full((128 * 2, img_len, 3), 255, dtype=np.uint8) state = {"t1": 0, "t": 0, "cur_pos": 0} colors = ['navy', 'blue', 'deepskyblue', 'teal', 'green', 'lightgreen', 'lime', 'orange', 'brown', 'grey', 'red', 'pink', 'aqua', 'orchid', 'bisque', 'coral'] colors = [PIL.ImageColor.getrgb(color) for color in colors] def draw_event(tokens): if tokens[0] in tokenizer.id_events: name = tokenizer.id_events[tokens[0]] if len(tokens) <= len(tokenizer.events[name]): return params = tokens[1:] params = [params[i] - tokenizer.parameter_ids[p][0] for i, p in enumerate(tokenizer.events[name])] if not all([0 <= params[i] < tokenizer.event_parameters[p] for i, p in enumerate(tokenizer.events[name])]): return event = [name] + params state["t1"] += event[1] t = state["t1"] * 16 + event[2] state["t"] = t if name == "note": tr, d, c, p = event[3:7] shift = t + d - (state["cur_pos"] + img_len) if shift > 0: img[:, :-shift] = img[:, shift:] img[:, -shift:] = 255 state["cur_pos"] += shift t = t - state["cur_pos"] img[p * 2:(p + 1) * 2, t: t + d] = colors[c] def get_img(): t = state["t"] - state["cur_pos"] img_new = img.copy() img_new[:, t: t + 2] = 0 return PIL.Image.fromarray(np.flip(img_new, 0)) disable_patch_change = False disable_channels = None if tab == 0: i = 0 mid = [[tokenizer.bos_id] + [tokenizer.pad_id] * (tokenizer.max_token_seq - 1)] patches = {} for instr in instruments: patches[i] = patch2number[instr] i = (i + 1) if i != 9 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: mid = tokenizer.tokenize(MIDI.midi2score(mid)) mid = np.asarray(mid, dtype=np.int64) mid = mid[:int(midi_events)] max_len += len(mid) for token_seq in mid: mid_seq.append(token_seq) draw_event(token_seq) generator = generate(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) for token_seq in generator: mid_seq.append(token_seq) draw_event(token_seq) yield mid_seq, get_img(), 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) yield mid_seq, get_img(), "output.mid", (44100, audio) 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) return "output.mid", (44100, audio) 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=512, help="max") opt = parser.parse_args() soundfont_path = hf_hub_download(repo_id="skytnt/midi-model", filename="soundfont.sf2") model_base_path = hf_hub_download(repo_id="skytnt/midi-model", filename="onnx/model_base.onnx") model_token_path = hf_hub_download(repo_id="skytnt/midi-model", filename="onnx/model_token.onnx") tokenizer = MIDITokenizer() providers = ['CUDAExecutionProvider', 'CPUExecutionProvider'] model_base = rt.InferenceSession(model_base_path, providers=providers) model_token = rt.InferenceSession(model_token_path, providers=providers) app = gr.Blocks() with app: gr.Markdown("

Midi Composer

") 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" ) tab_select = gr.Variable(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") example1 = gr.Examples([ [[], "None"], [["Acoustic Grand"], "None"], [["Acoustic Grand", "Violin", "Viola", "Cello", "Contrabass", "Timpani"], "Orchestra"], [["Acoustic Guitar(nylon)", "Acoustic Guitar(steel)", "Electric Guitar(jazz)", "Electric Guitar(clean)", "Electric Guitar(muted)", "Overdriven Guitar", "Distortion Guitar", "Electric Bass(finger)"], "Standard"], [["Acoustic Grand", "String Ensemble 1", "Trombone", "Tuba", "Muted Trumpet", "French Horn", "Oboe", "English Horn", "Bassoon", "Clarinet"], "Orchestra"] ], [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) 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_gen_events = gr.Slider(label="generate n midi events", minimum=1, maximum=opt.max_gen, step=1, value=opt.max_gen) 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=50, step=1, value=20) input_allow_cc = gr.Checkbox(label="allow midi cc event", value=True) run_btn = gr.Button("generate", variant="primary") stop_btn = gr.Button("stop") output_midi_seq = gr.Variable() output_midi_img = gr.Image(label="output image") output_midi = gr.File(label="output midi", file_types=[".mid"]) output_audio = gr.Audio(label="output audio", format="wav") run_event = run_btn.click(run, [tab_select, input_instruments, input_drum_kit, input_midi, input_midi_events, input_gen_events, input_temp, input_top_p, input_top_k, input_allow_cc], [output_midi_seq, output_midi_img, output_midi, output_audio]) stop_btn.click(cancel_run, output_midi_seq, [output_midi, output_audio], cancels=run_event, queue=False) app.queue(2).launch(server_port=opt.port, share=opt.share, inbrowser=True)