Upload Kimi-Audio-Reaction/modeling_moonshot_kimia.py with huggingface_hub

Kimi-Audio-Reaction/modeling_moonshot_kimia.py

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+# coding=utf-8
+# Copyright 2025 The Moonshot AI Team, Qwen Team, and HuggingFace Inc. team. All rights reserved.
+#
+# The code is based on Qwen2.5-7B, but modified for KimiAudio.
+#
+# Licensing Information:
+# - Code derived from Qwen2.5-7B is licensed under the Apache License, Version 2.0.
+# - Other parts of the code are licensed under the MIT License.
+#
+# Apache License, Version 2.0:
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# MIT License:
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+"""PyTorch KimiAudio model."""
+
+from typing import List, Optional, Tuple, Union
+import torch
+import torch.utils.checkpoint
+from torch import nn
+
+import transformers
+from packaging import version
+
+assert version.parse(transformers.__version__) >= version.parse("4.34.1")
+
+from transformers.modeling_outputs import (
+    BaseModelOutputWithPast,
+    CausalLMOutputWithPast,
+)
+from transformers.utils import (
+    logging,
+)
+from .configuration_moonshot_kimia import KimiAudioConfig
+import torch.nn.functional as F
+from transformers.models.qwen2.modeling_qwen2 import (
+    Qwen2RMSNorm,
+    Qwen2MLP,
+    Qwen2PreTrainedModel,
+)
+from transformers.models.qwen2.modeling_qwen2 import apply_rotary_pos_emb
+
+if version.parse(transformers.__version__) >= version.parse("4.35.0"):
+    from transformers.utils import is_flash_attn_2_available as is_flash_attn_available
+else:
+    from transformers.utils import is_flash_attn_available
+
+if is_flash_attn_available():
+    from flash_attn import flash_attn_func, flash_attn_varlen_func
+    from flash_attn.bert_padding import index_first_axis, pad_input, unpad_input  # noqa
+else:
+    raise RuntimeError("flash attention must be installed")
+
+
+logger = logging.get_logger(__name__)
+
+
+def _get_unpad_data(padding_mask):
+    seqlens_in_batch = padding_mask.sum(dim=-1, dtype=torch.int32)
+    indices = torch.nonzero(padding_mask.flatten(), as_tuple=False).flatten()
+    max_seqlen_in_batch = seqlens_in_batch.max().item()
+    cu_seqlens = F.pad(
+        torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.torch.int32), (1, 0)
+    )
+    return (
+        indices,
+        cu_seqlens,
+        max_seqlen_in_batch,
+    )
+
+
+def _upad_input(query_layer, key_layer, value_layer, padding_mask, query_length):
+    indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(padding_mask)
+    batch_size, kv_seq_len, num_key_value_heads, head_dim = key_layer.shape
+    num_heads = query_layer.shape[2]
+
+    key_layer = index_first_axis(
+        key_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim),
+        indices_k,
+    )
+    value_layer = index_first_axis(
+        value_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim),
+        indices_k,
+    )
+    if query_length == kv_seq_len:
+        query_layer = index_first_axis(
+            query_layer.reshape(batch_size * kv_seq_len, num_heads, head_dim), indices_k
+        )
+        cu_seqlens_q = cu_seqlens_k
+        max_seqlen_in_batch_q = max_seqlen_in_batch_k
+        indices_q = indices_k
+    elif query_length == 1:
+        max_seqlen_in_batch_q = 1
+        cu_seqlens_q = torch.arange(
+            batch_size + 1, dtype=torch.int32, device=query_layer.device
+        )  # There is a memcpy here, that is very bad.
+        indices_q = cu_seqlens_q[:-1]
+        query_layer = query_layer.squeeze(1)
+    else:
+        # The -q_len: slice assumes left padding.
+        padding_mask = padding_mask[:, -query_length:]
+        query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(
+            query_layer, padding_mask
+        )
+
+    return (
+        query_layer,
+        key_layer,
+        value_layer,
+        indices_q,
+        (cu_seqlens_q, cu_seqlens_k),
+        (max_seqlen_in_batch_q, max_seqlen_in_batch_k),
+    )
+
+
+# Copied from transformers.models.bart.modeling_bart._make_causal_mask
+def _make_causal_mask(
+    input_ids_shape: torch.Size,
+    dtype: torch.dtype,
+    device: torch.device,
+    past_key_values_length: int = 0,
+):
+    """
+    Make causal mask used for bi-directional self-attention.
+    """
+    bsz, tgt_len = input_ids_shape
+    mask = torch.full((tgt_len, tgt_len), torch.finfo(dtype).min, device=device)
+    mask_cond = torch.arange(mask.size(-1), device=device)
+    mask.masked_fill_(mask_cond < (mask_cond + 1).view(mask.size(-1), 1), 0)
+    mask = mask.to(dtype)
+
+    if past_key_values_length > 0:
+        mask = torch.cat(
+            [
+                torch.zeros(
+                    tgt_len, past_key_values_length, dtype=dtype, device=device
+                ),
+                mask,
+            ],
+            dim=-1,
+        )
+    return mask[None, None, :, :].expand(
+        bsz, 1, tgt_len, tgt_len + past_key_values_length
+    )
+
+
+# Copied from transformers.models.bart.modeling_bart._expand_mask
+def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
+    """
+    Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
+    """
+    bsz, src_len = mask.size()
+    tgt_len = tgt_len if tgt_len is not None else src_len
+
+    expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len, src_len).to(dtype)
+
+    inverted_mask = 1.0 - expanded_mask
+
+    return inverted_mask.masked_fill(
+        inverted_mask.to(torch.bool), torch.finfo(dtype).min
+    )
+
+
+class RotaryEmbedding(nn.Module):
+    def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
+        super().__init__()
+
+        self.dim = dim
+        self.max_position_embeddings = max_position_embeddings
+        self.base = base
+        inv_freq = 1.0 / (
+            self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim)
+        )
+        self.register_buffer("inv_freq", inv_freq, persistent=False)
+
+        # Build here to make `torch.jit.trace` work.
+        self._set_cos_sin_cache(
+            seq_len=max_position_embeddings,
+            device=self.inv_freq.device,
+            dtype=torch.get_default_dtype(),
+        )
+
+    def _set_cos_sin_cache(self, seq_len, device, dtype):
+        self.max_seq_len_cached = seq_len
+        t = torch.arange(
+            self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
+        )
+
+        freqs = torch.einsum("i,j->ij", t, self.inv_freq)
+        # Different from paper, but it uses a different permutation in order to obtain the same calculation
+        emb = torch.cat((freqs, freqs), dim=-1)
+        self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
+        self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
+
+    def forward(self, x, seq_len=None):
+        # x: [bs, num_attention_heads, seq_len, head_size]
+        if seq_len > self.max_seq_len_cached:
+            self._set_cos_sin_cache(seq_len=seq_len, device=x.device, dtype=x.dtype)
+
+        return (
+            self.cos_cached[:seq_len].to(dtype=x.dtype),
+            self.sin_cached[:seq_len].to(dtype=x.dtype),
+        )
+
+
+class MoonshotAttention(nn.Module):
+    """Multi-headed attention from 'Attention Is All You Need' paper"""
+
+    def __init__(self, config: KimiAudioConfig):
+        super().__init__()
+        self.config = config
+        self.hidden_size = config.hidden_size
+        self.num_heads = config.num_attention_heads
+        self.head_dim = self.hidden_size // self.num_heads
+        self.num_key_value_heads = config.num_key_value_heads
+        self.num_key_value_groups = self.num_heads // self.num_key_value_heads
+        self.max_position_embeddings = config.max_position_embeddings
+        self.rope_theta = config.rope_theta
+        if (self.head_dim * self.num_heads) != self.hidden_size:
+            raise ValueError(
+                f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
+                f" and `num_heads`: {self.num_heads})."
+            )
+        self.q_proj = nn.Linear(
+            self.hidden_size, self.num_heads * self.head_dim, bias=True
+        )
+        self.k_proj = nn.Linear(
+            self.hidden_size, self.num_key_value_heads * self.head_dim, bias=True
+        )
+        self.v_proj = nn.Linear(
+            self.hidden_size, self.num_key_value_heads * self.head_dim, bias=True
+        )
+        self.o_proj = nn.Linear(
+            self.num_heads * self.head_dim, self.hidden_size, bias=False
+        )
+
+        self._init_rope()
+
+    def _init_rope(self):
+
+        self.rotary_emb = RotaryEmbedding(
+            self.head_dim,
+            max_position_embeddings=self.max_position_embeddings,
+            base=self.rope_theta,
+        )
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Tuple[torch.Tensor]] = None,
+        output_attentions: bool = False,
+        use_cache: bool = False,
+        padding_mask: Optional[torch.LongTensor] = None,
+    ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
+        # LlamaFlashAttention2 attention does not support output_attentions
+
+        output_attentions = False
+
+        bsz, q_len, _ = hidden_states.size()
+
+        query_states = self.q_proj(hidden_states)
+        key_states = self.k_proj(hidden_states)
+        value_states = self.v_proj(hidden_states)
+
+        # Flash attention requires the input to have the shape
+        # batch_size x seq_length x head_dime x hidden_dim
+        # therefore we just need to keep the original shape
+        query_states = query_states.view(
+            bsz, q_len, self.num_heads, self.head_dim
+        ).transpose(1, 2)
+        key_states = key_states.view(
+            bsz, q_len, self.num_key_value_heads, self.head_dim
+        ).transpose(1, 2)
+        value_states = value_states.view(
+            bsz, q_len, self.num_key_value_heads, self.head_dim
+        ).transpose(1, 2)
+
+        kv_seq_len = key_states.shape[-2]
+        if past_key_value is not None:
+            kv_seq_len += past_key_value[0].shape[-2]
+
+        cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
+        cos = cos[position_ids]
+        sin = sin[position_ids]
+        query_states, key_states = apply_rotary_pos_emb(
+            query_states, key_states, cos, sin, position_ids
+        )
+
+        if past_key_value is not None:
+            # reuse k, v, self_attention
+            key_states = torch.cat([past_key_value[0], key_states], dim=2)
+            value_states = torch.cat([past_key_value[1], value_states], dim=2)
+
+        past_key_value = (key_states, value_states) if use_cache else None
+
+        query_states = query_states.transpose(1, 2)
+        key_states = key_states.transpose(1, 2)
+        value_states = value_states.transpose(1, 2)
+
+        # TODO: llama does not have dropout in the config??
+        # It is recommended to use dropout with FA according to the docs
+        # when training.
+        dropout_rate = 0.0  # if not self.training else self.attn_dropout
+
+        # In PEFT, usually we cast the layer norms in float32 for training stability reasons
+        # therefore the input hidden states gets silently casted in float32. Hence, we need
+        # cast them back in float16 just to be sure everything works as expected.
+        # This might slowdown training & inference so it is recommended to not cast the LayerNorms
+        # in fp32. (LlamaRMSNorm handles it correctly)
+        input_dtype = query_states.dtype
+        if input_dtype == torch.float32:
+            logger.warning_once(
+                "The input hidden states seems to be silently casted in float32, this might be related to"
+                " the fact you have upcasted embedding or layer norm layers in float32. We will cast back the input in"
+                " float16."
+            )
+
+            query_states = query_states.to(torch.float16)
+            key_states = key_states.to(torch.float16)
+            value_states = value_states.to(torch.float16)
+
+        attn_output = self._flash_attention_forward(
+            query_states,
+            key_states,
+            value_states,
+            padding_mask,
+            q_len,
+            dropout=dropout_rate,
+        )
+
+        if input_dtype == torch.float32:
+            attn_output = attn_output.to(torch.float32)
+
+        attn_output = attn_output.reshape(bsz, q_len, self.hidden_size).contiguous()
+        attn_output = self.o_proj(attn_output)
+
+        if not output_attentions:
+            attn_weights = None
+
+        return attn_output, attn_weights, past_key_value
+
+    def _flash_attention_forward(
+        self,
+        query_states,
+        key_states,
+        value_states,
+        padding_mask,
+        query_length,
+        dropout=0.0,
+        softmax_scale=None,
+    ):
+        """
+        Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
+        first unpad the input, then computes the attention scores and pad the final attention scores.
+
+        Args:
+            query_states (`torch.Tensor`):
+                Input query states to be passed to Flash Attention API
+            key_states (`torch.Tensor`):
+                Input key states to be passed to Flash Attention API
+            value_states (`torch.Tensor`):
+                Input value states to be passed to Flash Attention API
+            padding_mask (`torch.Tensor`):
+                The padding mask - corresponds to a tensor of size `(batch_size, seq_len)` where 0 stands for the
+                position of padding tokens and 1 for the position of non-padding tokens.
+            dropout (`int`, *optional*):
+                Attention dropout
+            softmax_scale (`float`, *optional*):
+                The scaling of QK^T before applying softmax. Default to 1 / sqrt(head_dim)
+        """
+        # Contains at least one padding token in the sequence
+        if padding_mask is not None:
+            batch_size = query_states.shape[0]
+            (
+                query_states,
+                key_states,
+                value_states,
+                indices_q,
+                cu_seq_lens,
+                max_seq_lens,
+            ) = _upad_input(
+                query_states, key_states, value_states, padding_mask, query_length
+            )
+
+            cu_seqlens_q, cu_seqlens_k = cu_seq_lens
+            max_seqlen_in_batch_q, max_seqlen_in_batch_k = max_seq_lens
+
+            attn_output_unpad = flash_attn_varlen_func(
+                query_states,
+                key_states,
+                value_states,
+                cu_seqlens_q=cu_seqlens_q,
+                cu_seqlens_k=cu_seqlens_k,
+                max_seqlen_q=max_seqlen_in_batch_q,
+                max_seqlen_k=max_seqlen_in_batch_k,
+                dropout_p=dropout,
+                softmax_scale=softmax_scale,
+                causal=True,
+            )
+
+            attn_output = pad_input(
+                attn_output_unpad, indices_q, batch_size, query_length
+            )
+        else:
+            attn_output = flash_attn_func(
+                query_states,
+                key_states,
+                value_states,
+                dropout,
+                softmax_scale=softmax_scale,
+                causal=True,
+            )
+
+        return attn_output
+
+
+class MoonshotDecoderLayer(nn.Module):
+    def __init__(self, config: KimiAudioConfig):
+        super().__init__()
+        self.hidden_size = config.hidden_size
+        self.config = config
+
+        logger.warning_once("using normal flash attention")
+        self.self_attn = MoonshotAttention(config=config)
+
+        self.mlp = Qwen2MLP(config)
+        self.input_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.post_attention_layernorm = Qwen2RMSNorm(
+            config.hidden_size, eps=config.rms_norm_eps
+        )
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Tuple[torch.Tensor]] = None,
+        output_attentions: Optional[bool] = False,
+        use_cache: Optional[bool] = False,
+        padding_mask: Optional[torch.LongTensor] = None,
+    ) -> Tuple[
+        torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]
+    ]:
+        """
+        Args:
+            hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
+            attention_mask (`torch.FloatTensor`, *optional*): attention mask of size
+                `(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values.
+            output_attentions (`bool`, *optional*):
+                Whether or not to return the attentions tensors of all attention layers. See `attentions` under
+                returned tensors for more detail.
+            use_cache (`bool`, *optional*):
+                If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
+                (see `past_key_values`).
+            past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
+        """
+
+        residual = hidden_states
+
+        hidden_states = self.input_layernorm(hidden_states)
+
+        # Self Attention
+        hidden_states, self_attn_weights, present_key_value = self.self_attn(
+            hidden_states=hidden_states,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_value=past_key_value,
+            output_attentions=output_attentions,
+            use_cache=use_cache,
+            padding_mask=padding_mask,
+        )
+        hidden_states = residual + hidden_states
+
+        # Fully Connected
+        residual = hidden_states
+        hidden_states = self.post_attention_layernorm(hidden_states)
+        hidden_states = self.mlp(hidden_states)
+        hidden_states = residual + hidden_states
+
+        outputs = (hidden_states,)
+
+        if output_attentions:
+            outputs += (self_attn_weights,)
+
+        if use_cache:
+            outputs += (present_key_value,)
+
+        return outputs
+
+
+class VQAdaptor(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.layers = nn.Sequential(
+            nn.Linear(config.kimia_adaptor_input_dim, config.hidden_size, bias=True),
+            nn.SiLU(),
+            nn.Dropout(0.0),
+            nn.Linear(config.hidden_size, config.hidden_size, bias=True),
+            nn.LayerNorm(config.hidden_size, eps=config.rms_norm_eps, bias=True),
+        )
+
+    def forward(self, x):
+        return self.layers(x)
+
+
+class MoonshotKimiaModel(Qwen2PreTrainedModel):
+    """
+    Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`QwenDecoderLayer`]
+
+    Args:
+        config: KimiAudioConfig
+    """
+
+    config_class = KimiAudioConfig
+
+    def __init__(self, config: KimiAudioConfig):
+        super().__init__(config)
+        self.padding_idx = config.pad_token_id
+        self.vocab_size = config.vocab_size
+        self.kimia_mimo_transformer_from_layer_index = (
+            config.kimia_mimo_transformer_from_layer_index
+        )
+
+        self.embed_tokens = nn.Embedding(
+            config.vocab_size, config.hidden_size, self.padding_idx
+        )
+        self.layers = nn.ModuleList(
+            [MoonshotDecoderLayer(config) for _ in range(config.num_hidden_layers)]
+        )
+        self.norm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+
+        # extra 1B audio transformers
+        self.mimo_layers = nn.ModuleList(
+            [MoonshotDecoderLayer(config) for _ in range(config.kimia_mimo_layers)]
+        )
+        self.mimo_norm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.use_whisper_feature = config.use_whisper_feature
+        if self.use_whisper_feature:
+            self.vq_adaptor = VQAdaptor(config)
+        self.kimia_media_begin = config.kimia_media_begin
+        self.kimia_media_end = config.kimia_media_end
+
+        self.gradient_checkpointing = False
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def get_input_embeddings(self):
+        return self.embed_tokens
+
+    def set_input_embeddings(self, value):
+        self.embed_tokens = value
+
+    # Copied from transformers.models.bart.modeling_bart.BartDecoder._prepare_decoder_attention_mask
+    def _prepare_decoder_attention_mask(
+        self, attention_mask, input_shape, inputs_embeds, past_key_values_length
+    ):
+        # create causal mask
+        # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
+        combined_attention_mask = None
+        if input_shape[-1] > 1:
+            combined_attention_mask = _make_causal_mask(
+                input_shape,
+                inputs_embeds.dtype,
+                device=inputs_embeds.device,
+                past_key_values_length=past_key_values_length,
+            )
+
+        if attention_mask is not None:
+            # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
+            expanded_attn_mask = _expand_mask(
+                attention_mask, inputs_embeds.dtype, tgt_len=input_shape[-1]
+            ).to(inputs_embeds.device)
+            combined_attention_mask = (
+                expanded_attn_mask
+                if combined_attention_mask is None
+                else expanded_attn_mask + combined_attention_mask
+            )
+
+        return combined_attention_mask
+
+    def forward(
+        self,
+        input_ids: torch.LongTensor = None,
+        text_input_ids: torch.LongTensor = None,
+        whisper_input_feature: Optional[torch.FloatTensor] = None,
+        is_continuous_mask: Optional[torch.Tensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[List[torch.FloatTensor]] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple, BaseModelOutputWithPast]:
+        output_attentions = (
+            output_attentions
+            if output_attentions is not None
+            else self.config.output_attentions
+        )
+        output_hidden_states = (
+            output_hidden_states
+            if output_hidden_states is not None
+            else self.config.output_hidden_states
+        )
+        use_cache = use_cache if use_cache is not None else self.config.use_cache
+
+        return_dict = (
+            return_dict if return_dict is not None else self.config.use_return_dict
+        )
+
+        # retrieve input_ids and inputs_embeds
+        if input_ids is not None and inputs_embeds is not None:
+            raise ValueError(
+                "You cannot specify both input_ids and inputs_embeds at the same time"
+            )
+        elif input_ids is not None:
+            batch_size, seq_length = input_ids.shape
+        elif inputs_embeds is not None:
+            batch_size, seq_length, _ = inputs_embeds.shape
+        else:
+            raise ValueError("You have to specify either input_ids or inputs_embeds")
+
+        seq_length_with_past = seq_length
+        past_key_values_length = 0
+
+        if past_key_values is not None:
+            past_key_values_length = past_key_values[0][0].shape[2]
+            seq_length_with_past = seq_length_with_past + past_key_values_length
+        if position_ids is None:
+            device = input_ids.device if input_ids is not None else inputs_embeds.device
+            position_ids = torch.arange(
+                past_key_values_length,
+                seq_length + past_key_values_length,
+                dtype=torch.long,
+                device=device,
+            )
+            position_ids = position_ids.unsqueeze(0)
+
+        if inputs_embeds is None:
+            # shape: batch, seq_len, hidden_size
+            input_ids = input_ids.to(torch.cuda.current_device())
+            text_input_ids = text_input_ids.to(torch.cuda.current_device())
+            audio_emb = self.embed_tokens(input_ids)
+            if self.use_whisper_feature and whisper_input_feature is not None:
+                if not isinstance(whisper_input_feature, list):
+                    whisper_input_feature = whisper_input_feature.squeeze(0)
+                    whisper_input_feature = [whisper_input_feature]
+
+                media_start_idx = (input_ids == self.kimia_media_begin).nonzero()
+                media_end_idx = (input_ids == self.kimia_media_end).nonzero()
+                # shape: batch, seq_len, hidden_size
+                whisper_input_dim = whisper_input_feature[0].shape[-1]
+                whisper_dtype = whisper_input_feature[0].dtype
+                expanded_whisper = (
+                    torch.zeros(audio_emb.shape[1], whisper_input_dim)
+                    .to(torch.cuda.current_device())
+                    .to(whisper_dtype)
+                )
+                for (seg_idx, start_idx), (_, end_idx) in zip(
+                    media_start_idx, media_end_idx
+                ):
+                    # assert whisper_emb.shape[1] == end_idx - (start_idx + 1)
+
+                    feat_len = end_idx - (start_idx + 1)
+                    whisper_input_feature_i = whisper_input_feature[seg_idx].squeeze(0)
+                    assert feat_len == is_continuous_mask[seg_idx].sum()
+                    expanded_whisper[start_idx + 1 : end_idx, :] = (
+                        whisper_input_feature_i[:feat_len, :]
+                    )
+
+                expanded_whisper = expanded_whisper.unsqueeze(0)
+                whisper_emb = self.vq_adaptor(
+                    expanded_whisper.transpose(0, 1)
+                ).transpose(0, 1)
+                is_continuous_mask = is_continuous_mask.to(torch.cuda.current_device())
+                whisper_emb = whisper_emb.to(torch.cuda.current_device())
+                whisper_emb = whisper_emb * is_continuous_mask[:, :, None]
+
+                encoder_input_addwith_discrete_token = (
+                    audio_emb + whisper_emb
+                ) * torch.sqrt(
+                    torch.tensor(
+                        2.0, dtype=whisper_emb.dtype, device=torch.cuda.current_device()
+                    )
+                )
+                audio_emb = (
+                    audio_emb * (~is_continuous_mask[:, :, None])
+                    + encoder_input_addwith_discrete_token
+                    * is_continuous_mask[:, :, None]
+                )
+            if text_input_ids is not None and text_input_ids.sum() != 0:
+                inputs_embeds = audio_emb + self.embed_tokens(text_input_ids)
+            else:
+                inputs_embeds = audio_emb
+        # embed positions
+        # TODO kill attention_mask for prefill
+        padding_mask = attention_mask
+
+        hidden_states = inputs_embeds
+
+        # decoder layers
+        all_hidden_states = () if output_hidden_states else None
+        all_self_attns = () if output_attentions else None
+        next_decoder_cache = () if use_cache else None
+        for idx, decoder_layer in enumerate(self.layers):
+            if output_hidden_states:
+                all_hidden_states += (hidden_states,)
+
+            past_key_value = (
+                past_key_values[idx] if past_key_values is not None else None
+            )
+            layer_outputs = decoder_layer(
+                hidden_states,
+                attention_mask=attention_mask,
+                position_ids=position_ids,
+                past_key_value=past_key_value,
+                output_attentions=output_attentions,
+                use_cache=use_cache,
+                padding_mask=padding_mask,
+            )
+
+            hidden_states = layer_outputs[0]
+            if idx == self.kimia_mimo_transformer_from_layer_index:
+                mimo_hidden_states = hidden_states.clone()
+
+            if use_cache:
+                next_decoder_cache += (layer_outputs[2 if output_attentions else 1],)
+
+            if output_attentions:
+                all_self_attns += (layer_outputs[1],)
+
+        hidden_states = self.norm(hidden_states)
+        if output_hidden_states:
+            all_hidden_states += (hidden_states,)
+
+        # apply audio transformer layers
+        for idx, decoder_layer in enumerate(self.mimo_layers):
+            if output_hidden_states:
+                all_hidden_states += (mimo_hidden_states,)
+
+            past_key_value = (
+                past_key_values[idx + len(self.layers)]
+                if past_key_values is not None
+                else None
+            )
+            layer_outputs = decoder_layer(
+                mimo_hidden_states,
+                attention_mask=attention_mask,
+                position_ids=position_ids,
+                past_key_value=past_key_value,
+                output_attentions=output_attentions,
+                use_cache=use_cache,
+                padding_mask=padding_mask,
+            )
+
+            mimo_hidden_states = layer_outputs[0]
+
+            if use_cache:
+                next_decoder_cache += (layer_outputs[2 if output_attentions else 1],)
+
+        mimo_hidden_states = self.mimo_norm(mimo_hidden_states)
+
+        # add hidden states from the last decoder layer
+        if output_hidden_states:
+            all_hidden_states += (mimo_hidden_states,)
+
+        next_cache = next_decoder_cache if use_cache else None
+        if not return_dict:
+            return tuple(
+                v
+                for v in [
+                    hidden_states,
+                    mimo_hidden_states,
+                    next_cache,
+                    all_hidden_states,
+                    all_hidden_states,
+                    all_self_attns,
+                ]
+                if v is not None
+            )
+        return BaseModelOutputWithPast(
+            last_hidden_state=(hidden_states, mimo_hidden_states),
+            past_key_values=next_cache,
+            hidden_states=all_hidden_states,
+            attentions=all_self_attns,
+        )
+
+
+class MoonshotKimiaForCausalLM(Qwen2PreTrainedModel):
+    _tied_weights_keys = ["lm_head.weight", "mimo_output.weight"]
+    config_class = KimiAudioConfig
+
+    def __init__(self, config):
+        super().__init__(config)
+        self.model = MoonshotKimiaModel(config)
+        self.vocab_size = config.vocab_size
+        self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
+        self.mimo_output = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def get_input_embeddings(self):
+        return self.model.embed_tokens
+
+    def set_input_embeddings(self, value):
+        self.model.embed_tokens = value
+
+    def get_output_embeddings(self):
+        return self.lm_head
+
+    def set_output_embeddings(self, new_embeddings):
+        self.lm_head = new_embeddings
+
+    def set_decoder(self, decoder):
+        self.model = decoder
+
+    def get_decoder(self):
+        return self.model
+
+    def forward(
+        self,
+        input_ids: torch.LongTensor = None,
+        text_input_ids: torch.LongTensor = None,
+        whisper_input_feature: Optional[torch.FloatTensor] = None,
+        is_continuous_mask: Optional[torch.Tensor] = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[List[torch.FloatTensor]] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        labels: Optional[torch.LongTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        generation_mode: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[Tuple, CausalLMOutputWithPast]:
+
+        output_attentions = (
+            output_attentions
+            if output_attentions is not None
+            else self.config.output_attentions
+        )
+        output_hidden_states = (
+            output_hidden_states
+            if output_hidden_states is not None
+            else self.config.output_hidden_states
+        )
+        return_dict = (
+            return_dict if return_dict is not None else self.config.use_return_dict
+        )
+
+        # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
+        outputs = self.model(
+            input_ids=input_ids,
+            text_input_ids=text_input_ids,
+            whisper_input_feature=whisper_input_feature,
+            is_continuous_mask=is_continuous_mask,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_values=past_key_values,
+            inputs_embeds=inputs_embeds,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+        if return_dict:
+            hidden_states, mimo_hidden_states = (
+                outputs.last_hidden_state[0],
+                outputs.last_hidden_state[1],
+            )
+        else:
+            hidden_states, mimo_hidden_states = outputs[0], outputs[1]
+
+        audio_logits = self.lm_head(hidden_states)
+        text_logits = self.mimo_output(mimo_hidden_states)
+
+        if not return_dict:
+            output = (text_logits, audio_logits) + outputs[2:]
+            return output
+        return CausalLMOutputWithPast(
+            loss=None,
+            logits=(text_logits, audio_logits),
+            past_key_values=outputs.past_key_values,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )