td_tts_2

codes/models/audio/tts/transformer_diffusion_tts2.py

@@ -0,0 +1,254 @@
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+from models.diffusion.nn import timestep_embedding, normalization, zero_module, conv_nd, linear
+from models.diffusion.unet_diffusion import TimestepEmbedSequential, TimestepBlock
+from models.lucidrains.x_transformers import Encoder, Attention, FeedForward, RMSScaleShiftNorm, RotaryEmbedding
+from trainer.networks import register_model
+from utils.util import checkpoint
+
+
+def is_latent(t):
+    return t.dtype == torch.float
+
+def is_sequence(t):
+    return t.dtype == torch.long
+
+
+class MultiGroupEmbedding(nn.Module):
+    def __init__(self, tokens, groups, dim):
+        super().__init__()
+        self.m = nn.ModuleList([nn.Embedding(tokens, dim // groups) for _ in range(groups)])
+
+    def forward(self, x):
+        h = [embedding(x[:, :, i]) for i, embedding in enumerate(self.m)]
+        return torch.cat(h, dim=-1)
+
+
+class TimestepRotaryEmbedSequential(nn.Sequential, TimestepBlock):
+    def forward(self, x, emb, rotary_emb):
+        for layer in self:
+            if isinstance(layer, TimestepBlock):
+                x = layer(x, emb, rotary_emb)
+            else:
+                x = layer(x, rotary_emb)
+        return x
+
+
+class DietAttentionBlock(TimestepBlock):
+    def __init__(self, in_dim, dim, heads, dropout):
+        super().__init__()
+        self.rms_scale_norm = RMSScaleShiftNorm(in_dim)
+        self.proj = nn.Linear(in_dim, dim)
+        self.attn = Attention(dim, heads=heads, causal=False, dropout=dropout)
+        self.ff = FeedForward(dim, in_dim, mult=1, dropout=dropout, zero_init_output=True)
+
+    def forward(self, x, timestep_emb, rotary_emb):
+        h = self.rms_scale_norm(x, norm_scale_shift_inp=timestep_emb)
+        h = self.proj(h)
+        h, _, _, _ = checkpoint(self.attn, h, None, None, None, None, None, rotary_emb)
+        h = checkpoint(self.ff, h)
+        return h + x
+
+
+class TransformerDiffusionTTS(nn.Module):
+    """
+    A diffusion model composed entirely of stacks of transformer layers. Why would you do it any other way?
+    """
+    def __init__(
+            self,
+            prenet_channels=256,
+            model_channels=512,
+            block_channels=256,
+            num_layers=8,
+            in_channels=256,
+            in_latent_channels=512,
+            clvp_in_dim=768,
+            rotary_emb_dim=32,
+            token_count=8,
+            in_groups=None,
+            types=2,
+            out_channels=512,  # mean and variance
+            dropout=0,
+            use_fp16=False,
+            # Parameters for regularization.
+            unconditioned_percentage=.1,  # This implements a mechanism similar to what is used in classifier-free training.
+    ):
+        super().__init__()
+
+        self.in_channels = in_channels
+        self.model_channels = model_channels
+        self.prenet_channels = prenet_channels
+        self.out_channels = out_channels
+        self.dropout = dropout
+        self.unconditioned_percentage = unconditioned_percentage
+        self.enable_fp16 = use_fp16
+
+        self.inp_block = conv_nd(1, in_channels, prenet_channels, 3, 1, 1)
+
+        self.time_embed = nn.Sequential(
+            linear(prenet_channels, prenet_channels),
+            nn.SiLU(),
+            linear(prenet_channels, prenet_channels),
+        )
+        prenet_heads = prenet_channels//64
+        self.conditioning_embedder = nn.Sequential(nn.Conv1d(in_channels, prenet_channels // 2, 3, padding=1, stride=2),
+                                                   nn.Conv1d(prenet_channels//2, prenet_channels,3,padding=1,stride=2))
+        self.conditioning_encoder = Encoder(
+                    dim=prenet_channels,
+                    depth=4,
+                    heads=prenet_heads,
+                    ff_dropout=dropout,
+                    attn_dropout=dropout,
+                    use_rmsnorm=True,
+                    ff_glu=True,
+                    rotary_pos_emb=True,
+                )
+        self.clvp_encoder = nn.Linear(clvp_in_dim, prenet_channels)
+        self.type_embedding = nn.Embedding(types, prenet_channels)
+
+        # Either code_converter or latent_converter is used, depending on what type of conditioning data is fed.
+        # This model is meant to be able to be trained on both for efficiency purposes - it is far less computationally
+        # complex to generate tokens, while generating latents will normally mean propagating through a deep autoregressive
+        # transformer network.
+        if in_groups is None:
+            self.embeddings = nn.Embedding(token_count, prenet_channels)
+        else:
+            self.embeddings = MultiGroupEmbedding(token_count, in_groups, prenet_channels)
+        self.latent_conditioner = nn.Sequential(
+            nn.Conv1d(in_latent_channels, prenet_channels, 3, padding=1),
+            Encoder(
+                    dim=prenet_channels,
+                    depth=2,
+                    heads=prenet_heads,
+                    ff_dropout=dropout,
+                    attn_dropout=dropout,
+                    use_rmsnorm=True,
+                    ff_glu=True,
+                    rotary_pos_emb=True,
+                )
+        )
+        self.latent_fade = nn.Parameter(torch.zeros(1,1,prenet_channels))
+        self.code_converter = Encoder(
+                    dim=prenet_channels,
+                    depth=3,
+                    heads=prenet_heads,
+                    ff_dropout=dropout,
+                    attn_dropout=dropout,
+                    use_rmsnorm=True,
+                    ff_glu=True,
+                    rotary_pos_emb=True,
+                )
+
+        self.unconditioned_embedding = nn.Parameter(torch.randn(1,1,prenet_channels))
+
+        self.rotary_embeddings = RotaryEmbedding(rotary_emb_dim)
+        self.cond_intg = nn.Linear(prenet_channels*4, model_channels)
+        self.intg = nn.Linear(prenet_channels*2, model_channels)
+
+        self.layers = TimestepRotaryEmbedSequential(*[DietAttentionBlock(model_channels, block_channels, block_channels // 64, dropout) for _ in range(num_layers)])
+
+
+        self.out = nn.Sequential(
+            normalization(model_channels),
+            nn.SiLU(),
+            zero_module(conv_nd(1, model_channels, out_channels, 3, padding=1)),
+        )
+
+        self.debug_codes = {}
+
+    def get_grad_norm_parameter_groups(self):
+        groups = {
+            'contextual_embedder': list(self.conditioning_embedder.parameters()),
+            'layers': list(self.layers.parameters()) + list(self.inp_block.parameters()),
+            'code_converters': list(self.embeddings.parameters()) + list(self.code_converter.parameters()) + list(self.latent_conditioner.parameters()),
+            'time_embed': list(self.time_embed.parameters()),
+        }
+        return groups
+
+    def timestep_independent(self, codes, conditioning_input, expected_seq_len, prenet_latent=None):
+        cond_emb = self.conditioning_embedder(conditioning_input).permute(0,2,1)
+        cond_emb = self.conditioning_encoder(cond_emb)[:, 0]
+
+        code_emb = self.embeddings(codes)
+        if prenet_latent is not None:
+            latent_conditioning = self.latent_conditioner(prenet_latent)
+            code_emb = code_emb + latent_conditioning * self.latent_fade
+
+        # Mask out the conditioning branch for whole batch elements, implementing something similar to classifier-free guidance.
+        if self.training and self.unconditioned_percentage > 0:
+            unconditioned_batches = torch.rand((code_emb.shape[0], 1, 1),
+                                               device=code_emb.device) < self.unconditioned_percentage
+            code_emb = torch.where(unconditioned_batches, self.unconditioned_embedding.repeat(codes.shape[0], 1, 1),
+                                   code_emb)
+        code_emb = self.code_converter(code_emb)
+
+        expanded_code_emb = F.interpolate(code_emb.permute(0,2,1), size=expected_seq_len, mode='nearest').permute(0,2,1)
+
+        return expanded_code_emb, cond_emb
+
+
+    def forward(self, x, timesteps, codes=None, conditioning_input=None, clvp_input=None, type=None, prenet_latent=None, precomputed_code_embeddings=None,
+                precomputed_cond_embeddings=None, conditioning_free=False):
+        if precomputed_code_embeddings is not None:
+            assert precomputed_cond_embeddings is not None, "Must specify both precomputed embeddings if one is specified"
+            assert codes is None and conditioning_input is None and prenet_latent is None, "Do not provide precomputed embeddings and the other parameters. It is unclear what you want me to do here."
+        assert type is not None, "Type is required."
+
+        unused_params = []
+        if conditioning_free:
+            code_emb = self.unconditioned_embedding.repeat(x.shape[0], 1, x.shape[-1])
+            unused_params.extend(list(self.code_converter.parameters()) + list(self.code_embedding.parameters()))
+            unused_params.extend(list(self.latent_conditioner.parameters()))
+        else:
+            if precomputed_code_embeddings is not None:
+                code_emb = precomputed_code_embeddings
+                cond_emb = precomputed_cond_embeddings
+            else:
+                code_emb, cond_emb = self.timestep_independent(codes, conditioning_input, x.shape[-1], prenet_latent)
+                if prenet_latent is None:
+                    unused_params.extend(list(self.latent_conditioner.parameters()) + [self.latent_fade])
+            unused_params.append(self.unconditioned_embedding)
+
+        clvp_emb = torch.zeros_like(cond_emb) if clvp_input is None else self.clvp_encoder(clvp_input)
+        type_emb = self.type_embedding(type)
+        if clvp_input is None:
+            unused_params.extend(self.clvp_encoder.parameters())
+        blk_emb = torch.cat([self.time_embed(timestep_embedding(timesteps, self.prenet_channels)), cond_emb, clvp_emb, type_emb], dim=-1)
+        blk_emb = self.cond_intg(blk_emb)
+        x = self.inp_block(x).permute(0,2,1)
+
+        rotary_pos_emb = self.rotary_embeddings(x.shape[1], x.device)
+        x = self.intg(torch.cat([x, code_emb], dim=-1))
+        x = self.layers(x, blk_emb, rotary_pos_emb)
+
+        x = x.float().permute(0,2,1)
+        out = self.out(x)
+
+        # Involve probabilistic or possibly unused parameters in loss so we don't get DDP errors.
+        extraneous_addition = 0
+        for p in unused_params:
+            extraneous_addition = extraneous_addition + p.mean()
+        out = out + extraneous_addition * 0
+
+        return out
+
+
+@register_model
+def register_transformer_diffusion_tts2(opt_net, opt):
+    return TransformerDiffusionTTS(**opt_net['kwargs'])
+
+
+if __name__ == '__main__':
+    clip = torch.randn(2, 256, 400)
+    aligned_latent = torch.randn(2,100,512)
+    aligned_sequence = torch.randint(0,8,(2,100,8))
+    cond = torch.randn(2, 256, 400)
+    ts = torch.LongTensor([600, 600])
+    clvp = torch.randn(2,768)
+    type = torch.LongTensor([0,1])
+    model = TransformerDiffusionTTS(model_channels=768, unconditioned_percentage=.5, in_groups=8, prenet_channels=512, block_channels=384)
+    o = model(clip, ts, aligned_sequence, cond, clvp_input=clvp, type=type)
+    #o = model(clip, ts, aligned_sequence, cond, aligned_latent)
+

codes/train.py

@@ -332,7 +332,7 @@ class Trainer:
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser()
-    parser.add_argument('-opt', type=str, help='Path to option YAML file.', default='../options/train_music_code2mel.yml')
+    parser.add_argument('-opt', type=str, help='Path to option YAML file.', default='../options/train_encoder_build_ctc_alignments.yml')
     parser.add_argument('--launcher', choices=['none', 'pytorch'], default='none', help='job launcher')
     args = parser.parse_args()
     opt = option.parse(args.opt, is_train=True)