440 lines
22 KiB
Python
440 lines
22 KiB
Python
import itertools
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import os
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import random
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import torch
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import torch.nn as nn
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import torch.nn.functional as F
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import torchaudio
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import torchvision
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from models.diffusion.nn import timestep_embedding, normalization, zero_module, conv_nd, linear
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from models.diffusion.unet_diffusion import TimestepBlock
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from models.lucidrains.x_transformers import Encoder, Attention, RMSScaleShiftNorm, RotaryEmbedding, \
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FeedForward
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from trainer.networks import register_model
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from utils.util import checkpoint, print_network, load_audio
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class TimestepRotaryEmbedSequential(nn.Sequential, TimestepBlock):
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def forward(self, x, emb, rotary_emb):
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for layer in self:
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if isinstance(layer, TimestepBlock):
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x = layer(x, emb, rotary_emb)
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else:
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x = layer(x, rotary_emb)
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return x
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class SubBlock(nn.Module):
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def __init__(self, inp_dim, contraction_dim, heads, dropout, use_conv):
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super().__init__()
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self.attn = Attention(inp_dim, out_dim=contraction_dim, heads=heads, dim_head=contraction_dim//heads, causal=False, dropout=dropout)
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self.attnorm = nn.LayerNorm(contraction_dim)
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self.use_conv = use_conv
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if use_conv:
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self.ff = nn.Conv1d(inp_dim+contraction_dim, contraction_dim, kernel_size=3, padding=1)
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else:
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self.ff = FeedForward(inp_dim+contraction_dim, dim_out=contraction_dim, mult=2, dropout=dropout)
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self.ffnorm = nn.LayerNorm(contraction_dim)
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def forward(self, x, rotary_emb):
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ah, _, _, _ = checkpoint(self.attn, x, None, None, None, None, None, rotary_emb)
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ah = F.gelu(self.attnorm(ah))
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h = torch.cat([ah, x], dim=-1)
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hf = checkpoint(self.ff, h.permute(0,2,1) if self.use_conv else h)
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hf = F.gelu(self.ffnorm(hf.permute(0,2,1) if self.use_conv else hf))
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h = torch.cat([h, hf], dim=-1)
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return h
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class ConcatAttentionBlock(TimestepBlock):
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def __init__(self, trunk_dim, contraction_dim, time_embed_dim, cond_dim_in, cond_dim_hidden, heads, dropout, cond_projection=True, use_conv=False):
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super().__init__()
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self.prenorm = RMSScaleShiftNorm(trunk_dim, embed_dim=time_embed_dim, bias=False)
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if cond_projection:
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self.tdim = trunk_dim+cond_dim_hidden
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self.cond_project = nn.Linear(cond_dim_in, cond_dim_hidden)
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else:
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self.tdim = trunk_dim
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self.block1 = SubBlock(self.tdim, contraction_dim, heads, dropout, use_conv)
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self.block2 = SubBlock(self.tdim+contraction_dim*2, contraction_dim, heads, dropout, use_conv)
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self.out = nn.Linear(contraction_dim*4, trunk_dim, bias=False)
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self.out.weight.data.zero_()
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def forward(self, x, cond, timestep_emb, rotary_emb):
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h = self.prenorm(x, norm_scale_shift_inp=timestep_emb)
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if hasattr(self, 'cond_project'):
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cond = self.cond_project(cond)
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h = torch.cat([h, cond], dim=-1)
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h = self.block1(h, rotary_emb)
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h = self.block2(h, rotary_emb)
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h = self.out(h[:,:,self.tdim:])
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return h + x
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class ConditioningEncoder(nn.Module):
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def __init__(self,
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cond_dim,
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embedding_dim,
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time_embed_dim,
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attn_blocks=6,
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num_attn_heads=8,
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dropout=.1,
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do_checkpointing=False,
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time_proj=True):
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super().__init__()
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attn = []
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self.init = nn.Conv1d(cond_dim, embedding_dim, kernel_size=1)
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self.time_proj = time_proj
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if time_proj:
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self.time_proj = nn.Linear(time_embed_dim, embedding_dim)
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self.attn = Encoder(
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dim=embedding_dim,
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depth=attn_blocks,
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heads=num_attn_heads,
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ff_dropout=dropout,
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attn_dropout=dropout,
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use_rmsnorm=True,
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ff_glu=True,
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rotary_pos_emb=True,
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zero_init_branch_output=True,
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ff_mult=2,
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do_checkpointing=do_checkpointing
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)
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self.dim = embedding_dim
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def forward(self, x, time_emb):
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h = self.init(x).permute(0,2,1)
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if self.time_proj:
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time_enc = self.time_proj(time_emb)
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h = torch.cat([time_enc.unsqueeze(1), h], dim=1)
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h = self.attn(h).permute(0,2,1)
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return h
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class TransformerDiffusionWithPointConditioning(nn.Module):
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def __init__(
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self,
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in_channels=256,
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out_channels=512, # mean and variance
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model_channels=1024,
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contraction_dim=256,
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time_embed_dim=256,
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num_layers=8,
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rotary_emb_dim=32,
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input_cond_dim=1024,
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num_heads=8,
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dropout=0,
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time_proj=True,
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new_cond=False,
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use_fp16=False,
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checkpoint_conditioning=True, # This will need to be false for DDP training. :(
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regularization=False,
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# Parameters for regularization.
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unconditioned_percentage=.1, # This implements a mechanism similar to what is used in classifier-free training.
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):
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super().__init__()
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self.in_channels = in_channels
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self.model_channels = model_channels
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self.time_embed_dim = time_embed_dim
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self.out_channels = out_channels
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self.dropout = dropout
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self.unconditioned_percentage = unconditioned_percentage
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self.enable_fp16 = use_fp16
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self.regularization = regularization
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self.new_cond = new_cond
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self.inp_block = conv_nd(1, in_channels, model_channels, 3, 1, 1)
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self.conditioning_encoder = ConditioningEncoder(256, model_channels, time_embed_dim, do_checkpointing=checkpoint_conditioning, time_proj=time_proj)
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self.time_embed = nn.Sequential(
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linear(time_embed_dim, time_embed_dim),
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nn.SiLU(),
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linear(time_embed_dim, time_embed_dim),
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)
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self.unconditioned_embedding = nn.Parameter(torch.randn(1,1,model_channels))
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self.rotary_embeddings = RotaryEmbedding(rotary_emb_dim)
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self.layers = TimestepRotaryEmbedSequential(*[ConcatAttentionBlock(model_channels,
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contraction_dim,
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time_embed_dim,
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cond_dim_in=input_cond_dim,
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cond_dim_hidden=input_cond_dim//2,
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heads=num_heads,
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dropout=dropout,
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cond_projection=(k % 3 == 0),
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use_conv=(k % 3 != 0),
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) for k in range(num_layers)])
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self.out = nn.Sequential(
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normalization(model_channels),
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nn.SiLU(),
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zero_module(conv_nd(1, model_channels, out_channels, 3, padding=1)),
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)
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self.debug_codes = {}
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def get_grad_norm_parameter_groups(self):
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attn1 = list(itertools.chain.from_iterable([lyr.block1.attn.parameters() for lyr in self.layers]))
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attn2 = list(itertools.chain.from_iterable([lyr.block2.attn.parameters() for lyr in self.layers]))
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ff1 = list(itertools.chain.from_iterable([lyr.block1.ff.parameters() for lyr in self.layers]))
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ff2 = list(itertools.chain.from_iterable([lyr.block2.ff.parameters() for lyr in self.layers]))
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blkout_layers = list(itertools.chain.from_iterable([lyr.out.parameters() for lyr in self.layers]))
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groups = {
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'prenorms': list(itertools.chain.from_iterable([lyr.prenorm.parameters() for lyr in self.layers])),
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'blk1_attention_layers': attn1,
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'blk2_attention_layers': attn2,
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'attention_layers': attn1 + attn2,
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'blk1_ff_layers': ff1,
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'blk2_ff_layers': ff2,
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'ff_layers': ff1 + ff2,
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'block_out_layers': blkout_layers,
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'rotary_embeddings': list(self.rotary_embeddings.parameters()),
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'out': list(self.out.parameters()),
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'x_proj': list(self.inp_block.parameters()),
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'layers': list(self.layers.parameters()),
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'time_embed': list(self.time_embed.parameters()),
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'conditioning_encoder': list(self.conditioning_encoder.parameters()),
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}
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return groups
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def process_conditioning(self, conditioning_input, time_emb, N, cond_start, cond_left, cond_right):
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if self.training and self.regularization:
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# frequency regularization
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fstart = random.randint(0, conditioning_input.shape[1] - 1)
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fclip = random.randint(1, min(conditioning_input.shape[1]-fstart, 16))
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conditioning_input[:,fstart:fstart+fclip] = 0
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# time regularization
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for k in range(1, random.randint(2, 4)):
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tstart = random.randint(0, conditioning_input.shape[-1] - 1)
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tclip = random.randint(1, min(conditioning_input.shape[-1]-tstart, 10))
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conditioning_input[:,:,tstart:tstart+tclip] = 0
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if cond_left is None and self.new_cond:
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cond_left = conditioning_input[:,:,:max(cond_start, 20)]
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left_pt = cond_start
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cond_right = conditioning_input[:,:,min(N+cond_start, conditioning_input.shape[-1]-20):]
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right_pt = cond_right.shape[-1] - (conditioning_input.shape[-1] - (N+cond_start))
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elif cond_left is None:
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assert conditioning_input.shape[-1] - cond_start - N >= 0, f'Some sort of conditioning misalignment, {conditioning_input.shape[-1], cond_start, N}'
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cond_pre = conditioning_input[:,:,:cond_start]
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cond_aligned = conditioning_input[:,:,cond_start:N+cond_start]
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cond_post = conditioning_input[:,:,N+cond_start:]
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# Break up conditioning input into two random segments aligned with the input.
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MIN_MARGIN = 8
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assert N > (MIN_MARGIN*2+4), f"Input size too small. Was {N} but requires at least {MIN_MARGIN*2+4}"
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break_pt = random.randint(2, N-MIN_MARGIN*2-2) + MIN_MARGIN
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cond_left = cond_aligned[:,:,:break_pt]
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cond_right = cond_aligned[:,:,break_pt:]
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if self.training:
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# Drop out a random amount of the aligned data. The network will need to figure out how to reconstruct this.
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to_remove_left = random.randint(1, cond_left.shape[-1]-MIN_MARGIN)
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cond_left = cond_left[:,:,:-to_remove_left]
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to_remove_right = random.randint(1, cond_right.shape[-1]-MIN_MARGIN)
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cond_right = cond_right[:,:,to_remove_right:]
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# Concatenate the _pre and _post back on.
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left_pt = cond_start
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right_pt = cond_right.shape[-1]
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cond_left = torch.cat([cond_pre, cond_left], dim=-1)
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cond_right = torch.cat([cond_right, cond_post], dim=-1)
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else:
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left_pt = -1
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right_pt = 0
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# Propagate through the encoder.
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cond_left_enc = self.conditioning_encoder(cond_left, time_emb)
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cs = cond_left_enc[:,:,left_pt]
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cond_right_enc = self.conditioning_encoder(cond_right, time_emb)
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ce = cond_right_enc[:,:,right_pt]
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cond_enc = torch.cat([cs.unsqueeze(-1), ce.unsqueeze(-1)], dim=-1)
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cond = F.interpolate(cond_enc, size=(N,), mode='linear', align_corners=True).permute(0,2,1)
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return cond
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def forward(self, x, timesteps, conditioning_input=None, cond_left=None, cond_right=None, conditioning_free=False, cond_start=0):
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unused_params = []
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time_emb = self.time_embed(timestep_embedding(timesteps, self.time_embed_dim))
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if conditioning_free:
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cond = self.unconditioned_embedding
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cond = cond.repeat(1,x.shape[-1],1)
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else:
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cond = self.process_conditioning(conditioning_input, time_emb, x.shape[-1], cond_start, cond_left, cond_right)
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# Mask out the conditioning branch for whole batch elements, implementing something similar to classifier-free guidance.
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if self.training and self.unconditioned_percentage > 0:
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unconditioned_batches = torch.rand((cond.shape[0], 1, 1),
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device=cond.device) < self.unconditioned_percentage
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cond = torch.where(unconditioned_batches, self.unconditioned_embedding.repeat(cond.shape[0], 1, 1), cond)
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unused_params.append(self.unconditioned_embedding)
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with torch.autocast(x.device.type, enabled=self.enable_fp16):
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x = self.inp_block(x).permute(0,2,1)
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rotary_pos_emb = self.rotary_embeddings(x.shape[1]+1, x.device)
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for layer in self.layers:
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x = checkpoint(layer, x, cond, time_emb, rotary_pos_emb)
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x = x.float().permute(0,2,1)
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out = self.out(x)
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# Involve probabilistic or possibly unused parameters in loss so we don't get DDP errors.
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extraneous_addition = 0
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for p in unused_params:
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extraneous_addition = extraneous_addition + p.mean()
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out = out + extraneous_addition * 0
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return out
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def before_step(self, step):
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scaled_grad_parameters = list(itertools.chain.from_iterable([lyr.out.parameters() for lyr in self.layers])) + \
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list(itertools.chain.from_iterable([lyr.prenorm.parameters() for lyr in self.layers]))
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# Scale back the gradients of the blkout and prenorm layers by a constant factor. These get two orders of magnitudes
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# higher gradients. Ideally we would use parameter groups, but ZeroRedundancyOptimizer makes this trickier than
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# directly fiddling with the gradients.
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if not self.new_cond: # Not really related, I just don't want to add a new config.
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for p in scaled_grad_parameters:
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if hasattr(p, 'grad') and p.grad is not None:
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p.grad *= .2
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@register_model
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def register_tfdpc5(opt_net, opt):
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return TransformerDiffusionWithPointConditioning(**opt_net['kwargs'])
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def test_cheater_model():
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clip = torch.randn(2, 256, 350)
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cl = torch.randn(2, 256, 646)
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ts = torch.LongTensor([600, 600])
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# For music:
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model = TransformerDiffusionWithPointConditioning(in_channels=256, out_channels=512, model_channels=1024,
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contraction_dim=512, num_heads=8, num_layers=15, dropout=0,
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unconditioned_percentage=.4, checkpoint_conditioning=False,
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regularization=True, new_cond=True)
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print_network(model)
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for cs in range(276,cl.shape[-1]-clip.shape[-1]):
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o = model(clip, ts, cl, cond_start=cs)
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pg = model.get_grad_norm_parameter_groups()
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def prmsz(lp):
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sz = 0
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for p in lp:
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q = 1
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for s in p.shape:
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q *= s
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sz += q
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return sz
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for k, v in pg.items():
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print(f'{k}: {prmsz(v)/1000000}')
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def test_conditioning_splitting_logic():
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ts = torch.LongTensor([600])
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class fake_conditioner(nn.Module):
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def __init__(self):
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super().__init__()
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def forward(self, t, _):
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print(t[:,0])
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return t
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model = TransformerDiffusionWithPointConditioning(in_channels=256, out_channels=512, model_channels=1024,
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contraction_dim=512, num_heads=8, num_layers=15, dropout=0,
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unconditioned_percentage=.4)
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model.conditioning_encoder = fake_conditioner()
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BASEDIM=30
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for x in range(BASEDIM+1, BASEDIM+20):
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start = random.randint(0,x-BASEDIM)
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cl = torch.arange(1, x+1, 1).view(1,1,-1).float().repeat(1,256,1)
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print("Effective input: " + str(cl[0, 0, start:BASEDIM+start]))
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res = model.process_conditioning(cl, ts, BASEDIM, start, None)
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print("Result: " + str(res[0,:,0]))
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print()
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def inference_tfdpc5_with_cheater():
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with torch.no_grad():
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os.makedirs('results/tfdpc_v3', exist_ok=True)
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# length = 40 * 22050 // 256 // 16
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samples = {'electronica1': load_audio('Y:\\split\\yt-music-eval\\00001.wav', 22050),
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'electronica2': load_audio('Y:\\split\\yt-music-eval\\00272.wav', 22050),
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'e_guitar': load_audio('Y:\\split\\yt-music-eval\\00227.wav', 22050),
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'creep': load_audio('Y:\\separated\\bt-music-3\\[2007] MTV Unplugged (Live) (Japan Edition)\\05 - Creep [Cover On Radiohead]\\00001\\no_vocals.wav', 22050),
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'rock1': load_audio('Y:\\separated\\bt-music-3\\2016 - Heal My Soul\\01 - Daze Of The Night\\00000\\no_vocals.wav', 22050),
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'kiss': load_audio('Y:\\separated\\bt-music-3\\KISS (2001) Box Set CD1\\02 Deuce (Demo Version)\\00000\\no_vocals.wav', 22050),
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'purp': load_audio('Y:\\separated\\bt-music-3\\Shades of Deep Purple\\11 Help (Alternate Take)\\00001\\no_vocals.wav', 22050),
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'western_stars': load_audio('Y:\\separated\\bt-music-3\\Western Stars\\01 Hitch Hikin\'\\00000\\no_vocals.wav', 22050),
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'silk': load_audio('Y:\\separated\\silk\\MonstercatSilkShowcase\\890\\00007\\no_vocals.wav', 22050),
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'long_electronica': load_audio('C:\\Users\\James\\Music\\longer_sample.wav', 22050),}
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for k, sample in samples.items():
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sample = sample.cuda()
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length = sample.shape[0]//256//16
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model = TransformerDiffusionWithPointConditioning(in_channels=256, out_channels=512, model_channels=1024,
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contraction_dim=512, num_heads=8, num_layers=12, dropout=0,
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use_fp16=False, unconditioned_percentage=0).eval().cuda()
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model.load_state_dict(torch.load('x:/dlas/experiments/train_music_cheater_gen_v3/models/59000_generator_ema.pth'))
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from trainer.injectors.audio_injectors import TorchMelSpectrogramInjector
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spec_fn = TorchMelSpectrogramInjector({'n_mel_channels': 256, 'mel_fmax': 11000, 'filter_length': 16000, 'true_normalization': True,
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'normalize': True, 'in': 'in', 'out': 'out'}, {}).cuda()
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ref_mel = spec_fn({'in': sample.unsqueeze(0)})['out']
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from trainer.injectors.audio_injectors import MusicCheaterLatentInjector
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cheater_encoder = MusicCheaterLatentInjector({'in': 'in', 'out': 'out'}, {}).cuda()
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ref_cheater = cheater_encoder({'in': ref_mel})['out']
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from models.diffusion.respace import SpacedDiffusion
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from models.diffusion.respace import space_timesteps
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from models.diffusion.gaussian_diffusion import get_named_beta_schedule
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diffuser = SpacedDiffusion(use_timesteps=space_timesteps(4000, [128]), model_mean_type='epsilon',
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model_var_type='learned_range', loss_type='mse', betas=get_named_beta_schedule('linear', 4000),
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conditioning_free=True, conditioning_free_k=1)
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# Conventional decoding method:
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gen_cheater = diffuser.ddim_sample_loop(model, (1,256,length), progress=True, model_kwargs={'true_cheater': ref_cheater})
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# Guidance decoding method:
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#mask = torch.ones_like(ref_cheater)
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#mask[:,:,15:-15] = 0
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#gen_cheater = diffuser.p_sample_loop_with_guidance(model, ref_cheater, mask, model_kwargs={'true_cheater': ref_cheater})
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# Just decode the ref.
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#gen_cheater = ref_cheater
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from models.audio.music.transformer_diffusion12 import TransformerDiffusionWithCheaterLatent
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diffuser = SpacedDiffusion(use_timesteps=space_timesteps(4000, [32]), model_mean_type='epsilon',
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model_var_type='learned_range', loss_type='mse', betas=get_named_beta_schedule('linear', 4000),
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conditioning_free=True, conditioning_free_k=1)
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wrap = TransformerDiffusionWithCheaterLatent(in_channels=256, out_channels=512, model_channels=1024,
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contraction_dim=512, prenet_channels=1024, input_vec_dim=256,
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prenet_layers=6, num_heads=8, num_layers=16, new_code_expansion=True,
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dropout=0, unconditioned_percentage=0).eval().cuda()
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wrap.load_state_dict(torch.load('x:/dlas/experiments/train_music_diffusion_tfd_cheater_from_scratch/models/56500_generator_ema.pth'))
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cheater_to_mel = wrap.diff
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gen_mel = diffuser.ddim_sample_loop(cheater_to_mel, (1,256,gen_cheater.shape[-1]*16), progress=True,
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model_kwargs={'codes': gen_cheater.permute(0,2,1)})
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torchvision.utils.save_image((gen_mel + 1)/2, f'results/tfdpc_v3/{k}.png')
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from utils.music_utils import get_mel2wav_v3_model
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m2w = get_mel2wav_v3_model().cuda()
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spectral_diffuser = SpacedDiffusion(use_timesteps=space_timesteps(4000, [32]), model_mean_type='epsilon',
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model_var_type='learned_range', loss_type='mse', betas=get_named_beta_schedule('linear', 4000),
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conditioning_free=True, conditioning_free_k=1)
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from trainer.injectors.audio_injectors import denormalize_mel
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gen_mel_denorm = denormalize_mel(gen_mel)
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output_shape = (1,16,gen_mel_denorm.shape[-1]*256//16)
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gen_wav = spectral_diffuser.ddim_sample_loop(m2w, output_shape, model_kwargs={'codes': gen_mel_denorm})
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from trainer.injectors.audio_injectors import pixel_shuffle_1d
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gen_wav = pixel_shuffle_1d(gen_wav, 16)
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torchaudio.save(f'results/tfdpc_v3/{k}.wav', gen_wav.squeeze(1).cpu(), 22050)
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torchaudio.save(f'results/tfdpc_v3/{k}_ref.wav', sample.unsqueeze(0).cpu(), 22050)
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if __name__ == '__main__':
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test_cheater_model()
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#test_conditioning_splitting_logic()
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#inference_tfdpc5_with_cheater()
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