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model.cpp
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model.cpp
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#include <stdarg.h>
#include <fstream>
#include <regex>
#include <set>
#include <string>
#include <unordered_map>
#include <vector>
#include "model.h"
#include "stable-diffusion.h"
#include "util.h"
#include "vocab.hpp"
#include "ggml/ggml-alloc.h"
#include "ggml/ggml-backend.h"
#include "ggml/ggml.h"
#include "stable-diffusion.h"
#ifdef SD_USE_METAL
#include "ggml-metal.h"
#endif
#define ST_HEADER_SIZE_LEN 8
uint64_t read_u64(uint8_t* buffer) {
// little endian
uint64_t value = 0;
value |= static_cast<int64_t>(buffer[7]) << 56;
value |= static_cast<int64_t>(buffer[6]) << 48;
value |= static_cast<int64_t>(buffer[5]) << 40;
value |= static_cast<int64_t>(buffer[4]) << 32;
value |= static_cast<int64_t>(buffer[3]) << 24;
value |= static_cast<int64_t>(buffer[2]) << 16;
value |= static_cast<int64_t>(buffer[1]) << 8;
value |= static_cast<int64_t>(buffer[0]);
return value;
}
int32_t read_int(uint8_t* buffer) {
// little endian
int value = 0;
value |= buffer[3] << 24;
value |= buffer[2] << 16;
value |= buffer[1] << 8;
value |= buffer[0];
return value;
}
uint16_t read_short(uint8_t* buffer) {
// little endian
uint16_t value = 0;
value |= buffer[1] << 8;
value |= buffer[0];
return value;
}
/*================================================= Preprocess ==================================================*/
std::string self_attn_names[] = {
"self_attn.q_proj.weight",
"self_attn.k_proj.weight",
"self_attn.v_proj.weight",
"self_attn.q_proj.bias",
"self_attn.k_proj.bias",
"self_attn.v_proj.bias",
};
const char* unused_tensors[] = {
"betas",
"alphas_cumprod_prev",
"sqrt_alphas_cumprod",
"sqrt_one_minus_alphas_cumprod",
"log_one_minus_alphas_cumprod",
"sqrt_recip_alphas_cumprod",
"sqrt_recipm1_alphas_cumprod",
"posterior_variance",
"posterior_log_variance_clipped",
"posterior_mean_coef1",
"posterior_mean_coef2",
"cond_stage_model.transformer.text_model.embeddings.position_ids",
"cond_stage_model.model.logit_scale",
"cond_stage_model.model.text_projection",
"conditioner.embedders.0.transformer.text_model.embeddings.position_ids",
"conditioner.embedders.0.model.logit_scale",
"conditioner.embedders.1.model.logit_scale",
"model.diffusion_model.time_embedding.cond_proj.weight",
"unet.time_embedding.cond_proj.weight",
"model_ema.decay",
"model_ema.num_updates",
"model_ema.diffusion_model",
"embedding_manager",
"denoiser.sigmas",
};
bool is_unused_tensor(std::string name) {
for (int i = 0; i < sizeof(unused_tensors) / sizeof(const char*); i++) {
if (starts_with(name, unused_tensors[i])) {
return true;
}
}
return false;
}
std::unordered_map<std::string, std::string> open_clip_to_hf_clip_model = {
{"model.ln_final.bias", "transformer.text_model.final_layer_norm.bias"},
{"model.ln_final.weight", "transformer.text_model.final_layer_norm.weight"},
{"model.positional_embedding", "transformer.text_model.embeddings.position_embedding.weight"},
{"model.token_embedding.weight", "transformer.text_model.embeddings.token_embedding.weight"},
{"model.text_projection", "transformer.text_model.text_projection"},
{"model.visual.class_embedding", "transformer.visual_model.embeddings.class_embedding"},
{"model.visual.conv1.weight", "transformer.visual_model.embeddings.patch_embedding.weight"},
{"model.visual.ln_post.bias", "transformer.visual_model.post_layernorm.bias"},
{"model.visual.ln_post.weight", "transformer.visual_model.post_layernorm.weight"},
{"model.visual.ln_pre.bias", "transformer.visual_model.pre_layernorm.bias"},
{"model.visual.ln_pre.weight", "transformer.visual_model.pre_layernorm.weight"},
{"model.visual.positional_embedding", "transformer.visual_model.embeddings.position_embedding.weight"},
{"model.visual.proj", "transformer.visual_model.visual_projection"},
};
std::unordered_map<std::string, std::string> open_clip_to_hk_clip_resblock = {
{"attn.out_proj.bias", "self_attn.out_proj.bias"},
{"attn.out_proj.weight", "self_attn.out_proj.weight"},
{"ln_1.bias", "layer_norm1.bias"},
{"ln_1.weight", "layer_norm1.weight"},
{"ln_2.bias", "layer_norm2.bias"},
{"ln_2.weight", "layer_norm2.weight"},
{"mlp.c_fc.bias", "mlp.fc1.bias"},
{"mlp.c_fc.weight", "mlp.fc1.weight"},
{"mlp.c_proj.bias", "mlp.fc2.bias"},
{"mlp.c_proj.weight", "mlp.fc2.weight"},
};
std::unordered_map<std::string, std::string> vae_decoder_name_map = {
{"first_stage_model.decoder.mid.attn_1.to_k.bias", "first_stage_model.decoder.mid.attn_1.k.bias"},
{"first_stage_model.decoder.mid.attn_1.to_k.weight", "first_stage_model.decoder.mid.attn_1.k.weight"},
{"first_stage_model.decoder.mid.attn_1.to_out.0.bias", "first_stage_model.decoder.mid.attn_1.proj_out.bias"},
{"first_stage_model.decoder.mid.attn_1.to_out.0.weight", "first_stage_model.decoder.mid.attn_1.proj_out.weight"},
{"first_stage_model.decoder.mid.attn_1.to_q.bias", "first_stage_model.decoder.mid.attn_1.q.bias"},
{"first_stage_model.decoder.mid.attn_1.to_q.weight", "first_stage_model.decoder.mid.attn_1.q.weight"},
{"first_stage_model.decoder.mid.attn_1.to_v.bias", "first_stage_model.decoder.mid.attn_1.v.bias"},
{"first_stage_model.decoder.mid.attn_1.to_v.weight", "first_stage_model.decoder.mid.attn_1.v.weight"},
};
std::string convert_open_clip_to_hf_clip(const std::string& name) {
std::string new_name = name;
std::string prefix;
if (starts_with(new_name, "conditioner.embedders.0.open_clip.")) {
prefix = "cond_stage_model.";
new_name = new_name.substr(strlen("conditioner.embedders.0.open_clip."));
} else if (starts_with(new_name, "conditioner.embedders.0.")) {
prefix = "cond_stage_model.";
new_name = new_name.substr(strlen("conditioner.embedders.0."));
} else if (starts_with(new_name, "conditioner.embedders.1.")) {
prefix = "cond_stage_model.1.";
new_name = new_name.substr(strlen("conditioner.embedders.0."));
} else if (starts_with(new_name, "cond_stage_model.")) {
prefix = "cond_stage_model.";
new_name = new_name.substr(strlen("cond_stage_model."));
} else {
return new_name;
}
if (open_clip_to_hf_clip_model.find(new_name) != open_clip_to_hf_clip_model.end()) {
new_name = open_clip_to_hf_clip_model[new_name];
}
std::string open_clip_resblock_prefix = "model.transformer.resblocks.";
std::string hf_clip_resblock_prefix = "transformer.text_model.encoder.layers.";
auto replace_suffix = [&]() {
if (new_name.find(open_clip_resblock_prefix) == 0) {
std::string remain = new_name.substr(open_clip_resblock_prefix.length());
std::string idx = remain.substr(0, remain.find("."));
std::string suffix = remain.substr(idx.length() + 1);
if (suffix == "attn.in_proj_weight" || suffix == "attn.in_proj_bias") {
new_name = hf_clip_resblock_prefix + idx + "." + suffix;
} else if (open_clip_to_hk_clip_resblock.find(suffix) != open_clip_to_hk_clip_resblock.end()) {
std::string new_suffix = open_clip_to_hk_clip_resblock[suffix];
new_name = hf_clip_resblock_prefix + idx + "." + new_suffix;
}
}
};
replace_suffix();
open_clip_resblock_prefix = "model.visual.transformer.resblocks.";
hf_clip_resblock_prefix = "transformer.visual_model.encoder.layers.";
replace_suffix();
return prefix + new_name;
}
std::string convert_vae_decoder_name(const std::string& name) {
if (vae_decoder_name_map.find(name) != vae_decoder_name_map.end()) {
return vae_decoder_name_map[name];
}
return name;
}
std::unordered_map<std::string, std::unordered_map<std::string, std::string>> suffix_conversion_underline = {
{
"attentions",
{
{"to_k", "k"},
{"to_q", "q"},
{"to_v", "v"},
{"to_out_0", "proj_out"},
{"group_norm", "norm"},
},
},
{
"resnets",
{
{"conv1", "in_layers_2"},
{"conv2", "out_layers_3"},
{"norm1", "in_layers_0"},
{"norm2", "out_layers_0"},
{"time_emb_proj", "emb_layers_1"},
{"conv_shortcut", "skip_connection"},
},
},
};
std::unordered_map<std::string, std::unordered_map<std::string, std::string>> suffix_conversion_dot = {
{
"attentions",
{
{"to_k", "k"},
{"to_q", "q"},
{"to_v", "v"},
{"to_out.0", "proj_out"},
{"group_norm", "norm"},
},
},
{
"resnets",
{
{"conv1", "in_layers.2"},
{"conv2", "out_layers.3"},
{"norm1", "in_layers.0"},
{"norm2", "out_layers.0"},
{"time_emb_proj", "emb_layers.1"},
{"conv_shortcut", "skip_connection"},
},
},
};
std::string convert_diffusers_name_to_compvis(const std::string& key, char seq) {
std::vector<std::string> m;
auto match = [](std::vector<std::string>& match_list, const std::regex& regex, const std::string& key) {
auto r = std::smatch{};
if (!std::regex_match(key, r, regex)) {
return false;
}
match_list.clear();
for (size_t i = 1; i < r.size(); ++i) {
match_list.push_back(r.str(i));
}
return true;
};
std::unordered_map<std::string, std::unordered_map<std::string, std::string>> suffix_conversion;
if (seq == '_') {
suffix_conversion = suffix_conversion_underline;
} else {
suffix_conversion = suffix_conversion_dot;
}
auto get_converted_suffix = [&suffix_conversion](const std::string& outer_key, const std::string& inner_key) {
auto outer_iter = suffix_conversion.find(outer_key);
if (outer_iter != suffix_conversion.end()) {
auto inner_iter = outer_iter->second.find(inner_key);
if (inner_iter != outer_iter->second.end()) {
return inner_iter->second;
}
}
return inner_key;
};
// unet
if (match(m, std::regex(format("unet%cconv_in(.*)", seq)), key)) {
return format("model%cdiffusion_model%cinput_blocks%c0%c0", seq, seq, seq, seq) + m[0];
}
if (match(m, std::regex(format("unet%cconv%cout(.*)", seq, seq)), key)) {
return format("model%cdiffusion_model%cout%c2", seq, seq, seq) + m[0];
}
if (match(m, std::regex(format("unet%cconv_norm_out(.*)", seq)), key)) {
return format("model%cdiffusion_model%cout%c0", seq, seq, seq) + m[0];
}
if (match(m, std::regex(format("unet%ctime_embedding%clinear_(\\d+)(.*)", seq, seq)), key)) {
return format("model%cdiffusion_model%ctime_embed%c", seq, seq, seq) + std::to_string(std::stoi(m[0]) * 2 - 2) + m[1];
}
if (match(m, std::regex(format("unet%cdown_blocks%c(\\d+)%c(attentions|resnets)%c(\\d+)%c(.+)", seq, seq, seq, seq, seq)), key)) {
std::string suffix = get_converted_suffix(m[1], m[3]);
// LOG_DEBUG("%s %s %s %s", m[0].c_str(), m[1].c_str(), m[2].c_str(), m[3].c_str());
return format("model%cdiffusion_model%cinput_blocks%c", seq, seq, seq) + std::to_string(1 + std::stoi(m[0]) * 3 + std::stoi(m[2])) + seq +
(m[1] == "attentions" ? "1" : "0") + seq + suffix;
}
if (match(m, std::regex(format("unet%cmid_block%c(attentions|resnets)%c(\\d+)%c(.+)", seq, seq, seq, seq)), key)) {
std::string suffix = get_converted_suffix(m[0], m[2]);
return format("model%cdiffusion_model%cmiddle_block%c", seq, seq, seq) + (m[0] == "attentions" ? "1" : std::to_string(std::stoi(m[1]) * 2)) +
seq + suffix;
}
if (match(m, std::regex(format("unet%cup_blocks%c(\\d+)%c(attentions|resnets)%c(\\d+)%c(.+)", seq, seq, seq, seq, seq)), key)) {
std::string suffix = get_converted_suffix(m[1], m[3]);
return format("model%cdiffusion_model%coutput_blocks%c", seq, seq, seq) + std::to_string(std::stoi(m[0]) * 3 + std::stoi(m[2])) + seq +
(m[1] == "attentions" ? "1" : "0") + seq + suffix;
}
if (match(m, std::regex(format("unet%cdown_blocks%c(\\d+)%cdownsamplers%c0%cconv", seq, seq, seq, seq, seq)), key)) {
return format("model%cdiffusion_model%cinput_blocks%c", seq, seq, seq) + std::to_string(3 + std::stoi(m[0]) * 3) + seq + "0" + seq + "op";
}
if (match(m, std::regex(format("unet%cup_blocks%c(\\d+)%cupsamplers%c0%cconv", seq, seq, seq, seq, seq)), key)) {
return format("model%cdiffusion_model%coutput_blocks%c", seq, seq, seq) + std::to_string(2 + std::stoi(m[0]) * 3) + seq +
(std::stoi(m[0]) > 0 ? "2" : "1") + seq + "conv";
}
// clip
if (match(m, std::regex(format("te%ctext_model%cencoder%clayers%c(\\d+)%c(.+)", seq, seq, seq, seq, seq)), key)) {
return format("cond_stage_model%ctransformer%ctext_model%cencoder%clayers%c", seq, seq, seq, seq, seq) + m[0] + seq + m[1];
}
if (match(m, std::regex(format("te%ctext_model(.*)", seq)), key)) {
return format("cond_stage_model%ctransformer%ctext_model", seq, seq) + m[0];
}
// vae
if (match(m, std::regex(format("vae%c(.*)%cconv_norm_out(.*)", seq, seq)), key)) {
return format("first_stage_model%c%s%cnorm_out%s", seq, m[0].c_str(), seq, m[1].c_str());
}
if (match(m, std::regex(format("vae%c(.*)%cmid_block%c(attentions|resnets)%c(\\d+)%c(.+)", seq, seq, seq, seq, seq)), key)) {
std::string suffix;
std::string block_name;
if (m[1] == "attentions") {
block_name = "attn";
suffix = get_converted_suffix(m[1], m[3]);
} else {
block_name = "block";
suffix = m[3];
}
return format("first_stage_model%c%s%cmid%c%s_%d%c%s",
seq, m[0].c_str(), seq, seq, block_name.c_str(), std::stoi(m[2]) + 1, seq, suffix.c_str());
}
if (match(m, std::regex(format("vae%c(.*)%cup_blocks%c(\\d+)%cresnets%c(\\d+)%c(.+)", seq, seq, seq, seq, seq, seq)), key)) {
std::string suffix = m[3];
if (suffix == "conv_shortcut") {
suffix = "nin_shortcut";
}
return format("first_stage_model%c%s%cup%c%d%cblock%c%s%c%s",
seq, m[0].c_str(), seq, seq, 3 - std::stoi(m[1]), seq, seq, m[2].c_str(), seq, suffix.c_str());
}
if (match(m, std::regex(format("vae%c(.*)%cdown_blocks%c(\\d+)%cdownsamplers%c0%cconv", seq, seq, seq, seq, seq, seq)), key)) {
return format("first_stage_model%c%s%cdown%c%d%cdownsample%cconv",
seq, m[0].c_str(), seq, seq, std::stoi(m[1]), seq, seq);
}
if (match(m, std::regex(format("vae%c(.*)%cdown_blocks%c(\\d+)%cresnets%c(\\d+)%c(.+)", seq, seq, seq, seq, seq, seq)), key)) {
std::string suffix = m[3];
if (suffix == "conv_shortcut") {
suffix = "nin_shortcut";
}
return format("first_stage_model%c%s%cdown%c%d%cblock%c%s%c%s",
seq, m[0].c_str(), seq, seq, std::stoi(m[1]), seq, seq, m[2].c_str(), seq, suffix.c_str());
}
if (match(m, std::regex(format("vae%c(.*)%cup_blocks%c(\\d+)%cupsamplers%c0%cconv", seq, seq, seq, seq, seq, seq)), key)) {
return format("first_stage_model%c%s%cup%c%d%cupsample%cconv",
seq, m[0].c_str(), seq, seq, 3 - std::stoi(m[1]), seq, seq);
}
if (match(m, std::regex(format("vae%c(.*)", seq)), key)) {
return format("first_stage_model%c", seq) + m[0];
}
return key;
}
std::string convert_tensor_name(const std::string& name) {
std::string new_name;
if (starts_with(name, "cond_stage_model.") || starts_with(name, "conditioner.embedders.")) {
new_name = convert_open_clip_to_hf_clip(name);
} else if (starts_with(name, "first_stage_model.decoder")) {
new_name = convert_vae_decoder_name(name);
} else if (starts_with(name, "control_model.")) { // for controlnet pth models
size_t pos = name.find('.');
if (pos != std::string::npos) {
new_name = name.substr(pos + 1);
}
} else if (starts_with(name, "lora_")) { // for lora
size_t pos = name.find('.');
if (pos != std::string::npos) {
std::string name_without_network_parts = name.substr(5, pos - 5);
std::string network_part = name.substr(pos + 1);
// LOG_DEBUG("%s %s", name_without_network_parts.c_str(), network_part.c_str());
std::string new_key = convert_diffusers_name_to_compvis(name_without_network_parts, '_');
if (new_key.empty()) {
new_name = name;
} else {
new_name = "lora." + new_key + "." + network_part;
}
} else {
new_name = name;
}
} else if (starts_with(name, "unet") || starts_with(name, "vae") || starts_with(name, "te")) { // for diffuser
size_t pos = name.find_last_of('.');
if (pos != std::string::npos) {
std::string name_without_network_parts = name.substr(0, pos);
std::string network_part = name.substr(pos + 1);
// LOG_DEBUG("%s %s", name_without_network_parts.c_str(), network_part.c_str());
std::string new_key = convert_diffusers_name_to_compvis(name_without_network_parts, '.');
if (new_key.empty()) {
new_name = name;
} else {
new_name = new_key + "." + network_part;
}
} else {
new_name = name;
}
} else {
new_name = name;
}
// if (new_name != name) {
// LOG_DEBUG("%s => %s", name.c_str(), new_name.c_str());
// }
return new_name;
}
void preprocess_tensor(TensorStorage tensor_storage,
std::vector<TensorStorage>& processed_tensor_storages) {
std::vector<TensorStorage> result;
std::string new_name = convert_tensor_name(tensor_storage.name);
// convert unet transformer linear to conv2d 1x1
if (starts_with(new_name, "model.diffusion_model.") &&
(ends_with(new_name, "proj_in.weight") || ends_with(new_name, "proj_out.weight"))) {
tensor_storage.unsqueeze();
}
// convert vae attn block linear to conv2d 1x1
if (starts_with(new_name, "first_stage_model.") && new_name.find("attn_1") != std::string::npos) {
tensor_storage.unsqueeze();
}
tensor_storage.name = new_name;
if (new_name.find("cond_stage_model") != std::string::npos &&
ends_with(new_name, "attn.in_proj_weight")) {
size_t prefix_size = new_name.find("attn.in_proj_weight");
std::string prefix = new_name.substr(0, prefix_size);
std::vector<TensorStorage> chunks = tensor_storage.chunk(3);
chunks[0].name = prefix + "self_attn.q_proj.weight";
chunks[1].name = prefix + "self_attn.k_proj.weight";
chunks[2].name = prefix + "self_attn.v_proj.weight";
processed_tensor_storages.insert(processed_tensor_storages.end(), chunks.begin(), chunks.end());
} else if (new_name.find("cond_stage_model") != std::string::npos &&
ends_with(new_name, "attn.in_proj_bias")) {
size_t prefix_size = new_name.find("attn.in_proj_bias");
std::string prefix = new_name.substr(0, prefix_size);
std::vector<TensorStorage> chunks = tensor_storage.chunk(3);
chunks[0].name = prefix + "self_attn.q_proj.bias";
chunks[1].name = prefix + "self_attn.k_proj.bias";
chunks[2].name = prefix + "self_attn.v_proj.bias";
processed_tensor_storages.insert(processed_tensor_storages.end(), chunks.begin(), chunks.end());
} else {
processed_tensor_storages.push_back(tensor_storage);
}
}
float bf16_to_f32(uint16_t bfloat16) {
uint32_t val_bits = (static_cast<uint32_t>(bfloat16) << 16);
return *reinterpret_cast<float*>(&val_bits);
}
void bf16_to_f32_vec(uint16_t* src, float* dst, int64_t n) {
// support inplace op
for (int64_t i = n - 1; i >= 0; i--) {
dst[i] = bf16_to_f32(src[i]);
}
}
void convert_tensor(void* src,
ggml_type src_type,
void* dst,
ggml_type dst_type,
int nrows,
int n_per_row) {
int n = nrows * n_per_row;
if (src_type == dst_type) {
size_t nbytes = n * ggml_type_size(src_type) / ggml_blck_size(src_type);
memcpy(((char*)dst), ((char*)src), nbytes);
} else if (src_type == GGML_TYPE_F32) {
if (dst_type == GGML_TYPE_F16) {
ggml_fp32_to_fp16_row((float*)src, (ggml_fp16_t*)dst, n);
} else {
int64_t hist[16];
std::vector<float> imatrix(n_per_row, 1.0f); // dummy importance matrix
const float* im = imatrix.data();
ggml_quantize_chunk(dst_type, (float*)src, dst, 0, nrows, n_per_row, hist, im);
}
} else if (dst_type == GGML_TYPE_F32) {
if (src_type == GGML_TYPE_F16) {
ggml_fp16_to_fp32_row((ggml_fp16_t*)src, (float*)dst, n);
} else {
auto qtype = ggml_internal_get_type_traits(src_type);
if (qtype.to_float == NULL) {
throw std::runtime_error(format("type %s unsupported for integer quantization: no dequantization available",
ggml_type_name(src_type)));
}
qtype.to_float(src, (float*)dst, n);
}
} else {
// src_type == GGML_TYPE_F16 => dst_type is quantized
// src_type is quantized => dst_type == GGML_TYPE_F16 or dst_type is quantized
auto qtype = ggml_internal_get_type_traits(src_type);
if (qtype.to_float == NULL) {
throw std::runtime_error(format("type %s unsupported for integer quantization: no dequantization available",
ggml_type_name(src_type)));
}
std::vector<char> buf;
buf.resize(sizeof(float) * n);
char* src_data_f32 = buf.data();
qtype.to_float(src, (float*)src_data_f32, n);
if (dst_type == GGML_TYPE_F16) {
ggml_fp32_to_fp16_row((float*)src_data_f32, (ggml_fp16_t*)dst, n);
} else {
int64_t hist[16];
std::vector<float> imatrix(n_per_row, 1.0f); // dummy importance matrix
const float* im = imatrix.data();
ggml_quantize_chunk(dst_type, (float*)src_data_f32, dst, 0, nrows, n_per_row, hist, im);
}
}
}
/*================================================= ModelLoader ==================================================*/
// ported from https://github.com/openai/CLIP/blob/main/clip/simple_tokenizer.py#L16
std::map<char, int> unicode_to_byte() {
std::map<int, char> byte_to_unicode;
// List of utf-8 byte ranges
for (int b = static_cast<int>('!'); b <= static_cast<int>('~'); ++b) {
byte_to_unicode[b] = static_cast<char>(b);
}
for (int b = 49825; b <= 49836; ++b) {
byte_to_unicode[b] = static_cast<char>(b);
}
for (int b = 49838; b <= 50111; ++b) {
byte_to_unicode[b] = static_cast<char>(b);
}
// printf("%d %d %d %d\n", static_cast<int>('¡'), static_cast<int>('¬'), static_cast<int>('®'), static_cast<int>('ÿ'));
// exit(1);
int n = 0;
for (int b = 0; b < 256; ++b) {
if (byte_to_unicode.find(b) == byte_to_unicode.end()) {
byte_to_unicode[b] = static_cast<char>(256 + n);
n++;
}
}
// byte_encoder = bytes_to_unicode()
// byte_decoder = {v: k for k, v in byte_encoder.items()}
std::map<char, int> byte_decoder;
for (const auto& entry : byte_to_unicode) {
byte_decoder[entry.second] = entry.first;
}
byte_to_unicode.clear();
return byte_decoder;
}
bool is_zip_file(const std::string& file_path) {
struct zip_t* zip = zip_open(file_path.c_str(), 0, 'r');
if (zip == NULL) {
return false;
}
zip_close(zip);
return true;
}
bool is_gguf_file(const std::string& file_path) {
std::ifstream file(file_path, std::ios::binary);
if (!file.is_open()) {
return false;
}
char magic[4];
file.read(magic, sizeof(magic));
if (!file) {
return false;
}
for (uint32_t i = 0; i < sizeof(magic); i++) {
if (magic[i] != GGUF_MAGIC[i]) {
return false;
}
}
return true;
}
bool is_safetensors_file(const std::string& file_path) {
std::ifstream file(file_path, std::ios::binary);
if (!file.is_open()) {
return false;
}
// get file size
file.seekg(0, file.end);
size_t file_size_ = file.tellg();
file.seekg(0, file.beg);
// read header size
if (file_size_ <= ST_HEADER_SIZE_LEN) {
return false;
}
uint8_t header_size_buf[ST_HEADER_SIZE_LEN];
file.read((char*)header_size_buf, ST_HEADER_SIZE_LEN);
if (!file) {
return false;
}
size_t header_size_ = read_u64(header_size_buf);
if (header_size_ >= file_size_ || header_size_ <= 2) {
return false;
}
// read header
std::vector<char> header_buf;
header_buf.resize(header_size_ + 1);
header_buf[header_size_] = '\0';
file.read(header_buf.data(), header_size_);
if (!file) {
return false;
}
nlohmann::json header_ = nlohmann::json::parse(header_buf.data());
if (header_.is_discarded()) {
return false;
}
return true;
}
bool ModelLoader::init_from_file(const std::string& file_path, const std::string& prefix) {
if (is_directory(file_path)) {
LOG_INFO("load %s using diffusers format", file_path.c_str());
return init_from_diffusers_file(file_path, prefix);
} else if (is_gguf_file(file_path)) {
LOG_INFO("load %s using gguf format", file_path.c_str());
return init_from_gguf_file(file_path, prefix);
} else if (is_safetensors_file(file_path)) {
LOG_INFO("load %s using safetensors format", file_path.c_str());
return init_from_safetensors_file(file_path, prefix);
} else if (is_zip_file(file_path)) {
LOG_INFO("load %s using checkpoint format", file_path.c_str());
return init_from_ckpt_file(file_path, prefix);
} else {
LOG_WARN("unknown format %s", file_path.c_str());
return false;
}
}
/*================================================= GGUFModelLoader ==================================================*/
bool ModelLoader::init_from_gguf_file(const std::string& file_path, const std::string& prefix) {
LOG_DEBUG("init from '%s'", file_path.c_str());
file_paths_.push_back(file_path);
size_t file_index = file_paths_.size() - 1;
gguf_context* ctx_gguf_ = NULL;
ggml_context* ctx_meta_ = NULL;
ctx_gguf_ = gguf_init_from_file(file_path.c_str(), {true, &ctx_meta_});
if (!ctx_gguf_) {
LOG_ERROR("failed to open '%s'", file_path.c_str());
return false;
}
int n_tensors = gguf_get_n_tensors(ctx_gguf_);
size_t total_size = 0;
size_t data_offset = gguf_get_data_offset(ctx_gguf_);
for (int i = 0; i < n_tensors; i++) {
std::string name = gguf_get_tensor_name(ctx_gguf_, i);
struct ggml_tensor* dummy = ggml_get_tensor(ctx_meta_, name.c_str());
size_t offset = data_offset + gguf_get_tensor_offset(ctx_gguf_, i);
// LOG_DEBUG("%s", name.c_str());
TensorStorage tensor_storage(prefix + name, dummy->type, dummy->ne, ggml_n_dims(dummy), file_index, offset);
GGML_ASSERT(ggml_nbytes(dummy) == tensor_storage.nbytes());
tensor_storages.push_back(tensor_storage);
}
gguf_free(ctx_gguf_);
ggml_free(ctx_meta_);
return true;
}
/*================================================= SafeTensorsModelLoader ==================================================*/
ggml_type str_to_ggml_type(const std::string& dtype) {
ggml_type ttype = GGML_TYPE_COUNT;
if (dtype == "F16") {
ttype = GGML_TYPE_F16;
} else if (dtype == "BF16") {
ttype = GGML_TYPE_F32;
} else if (dtype == "F32") {
ttype = GGML_TYPE_F32;
}
return ttype;
}
// https://huggingface.co/docs/safetensors/index
bool ModelLoader::init_from_safetensors_file(const std::string& file_path, const std::string& prefix) {
LOG_DEBUG("init from '%s'", file_path.c_str());
file_paths_.push_back(file_path);
size_t file_index = file_paths_.size() - 1;
std::ifstream file(file_path, std::ios::binary);
if (!file.is_open()) {
LOG_ERROR("failed to open '%s'", file_path.c_str());
return false;
}
// get file size
file.seekg(0, file.end);
size_t file_size_ = file.tellg();
file.seekg(0, file.beg);
// read header size
if (file_size_ <= ST_HEADER_SIZE_LEN) {
LOG_ERROR("invalid safetensor file '%s'", file_path.c_str());
return false;
}
uint8_t header_size_buf[ST_HEADER_SIZE_LEN];
file.read((char*)header_size_buf, ST_HEADER_SIZE_LEN);
if (!file) {
LOG_ERROR("read safetensors header size failed: '%s'", file_path.c_str());
return false;
}
size_t header_size_ = read_u64(header_size_buf);
if (header_size_ >= file_size_) {
LOG_ERROR("invalid safetensor file '%s'", file_path.c_str());
return false;
}
// read header
std::vector<char> header_buf;
header_buf.resize(header_size_ + 1);
header_buf[header_size_] = '\0';
file.read(header_buf.data(), header_size_);
if (!file) {
LOG_ERROR("read safetensors header failed: '%s'", file_path.c_str());
return false;
}
nlohmann::json header_ = nlohmann::json::parse(header_buf.data());
for (auto& item : header_.items()) {
std::string name = item.key();
nlohmann::json tensor_info = item.value();
// LOG_DEBUG("%s %s\n", name.c_str(), tensor_info.dump().c_str());
if (name == "__metadata__") {
continue;
}
if (is_unused_tensor(name)) {
continue;
}
std::string dtype = tensor_info["dtype"];
nlohmann::json shape = tensor_info["shape"];
size_t begin = tensor_info["data_offsets"][0].get<size_t>();
size_t end = tensor_info["data_offsets"][1].get<size_t>();
ggml_type type = str_to_ggml_type(dtype);
if (type == GGML_TYPE_COUNT) {
LOG_ERROR("unsupported dtype '%s'", dtype.c_str());
return false;
}
if (shape.size() > SD_MAX_DIMS) {
LOG_ERROR("invalid tensor '%s'", name.c_str());
return false;
}
int n_dims = (int)shape.size();
int64_t ne[SD_MAX_DIMS] = {1, 1, 1, 1, 1};
for (int i = 0; i < n_dims; i++) {
ne[i] = shape[i].get<int64_t>();
}
if (n_dims == 5) {
if (ne[3] == 1 && ne[4] == 1) {
n_dims = 4;
} else {
LOG_ERROR("invalid tensor '%s'", name.c_str());
return false;
}
}
TensorStorage tensor_storage(prefix + name, type, ne, n_dims, file_index, ST_HEADER_SIZE_LEN + header_size_ + begin);
tensor_storage.reverse_ne();
size_t tensor_data_size = end - begin;
if (dtype == "BF16") {
tensor_storage.is_bf16 = true;
GGML_ASSERT(tensor_storage.nbytes() == tensor_data_size * 2);
} else {
GGML_ASSERT(tensor_storage.nbytes() == tensor_data_size);
}
tensor_storages.push_back(tensor_storage);
// LOG_DEBUG("%s %s", tensor_storage.to_string().c_str(), dtype.c_str());
}
return true;
}
/*================================================= DiffusersModelLoader ==================================================*/
bool ModelLoader::init_from_diffusers_file(const std::string& file_path, const std::string& prefix) {
std::string unet_path = path_join(file_path, "unet/diffusion_pytorch_model.safetensors");
std::string vae_path = path_join(file_path, "vae/diffusion_pytorch_model.safetensors");
std::string clip_path = path_join(file_path, "text_encoder/model.safetensors");
if (!init_from_safetensors_file(unet_path, "unet.")) {
return false;
}
if (!init_from_safetensors_file(vae_path, "vae.")) {
return false;
}
if (!init_from_safetensors_file(clip_path, "te.")) {
return false;
}
return true;
}
/*================================================= CkptModelLoader ==================================================*/
// $ python -m pickletools sd-v1-4/archive/data.pkl | head -n 100
// 0: \x80 PROTO 2
// 2: } EMPTY_DICT
// 3: q BINPUT 0
// 5: ( MARK
// 6: X BINUNICODE 'epoch'
// 16: q BINPUT 1
// 18: K BININT1 6
// 20: X BINUNICODE 'global_step'
// 36: q BINPUT 2
// 38: J BININT 470000
// 43: X BINUNICODE 'pytorch-lightning_version'
// 73: q BINPUT 3
// 75: X BINUNICODE '1.4.2'
// 85: q BINPUT 4
// 87: X BINUNICODE 'state_dict'
// 102: q BINPUT 5
// 104: } EMPTY_DICT
// 105: q BINPUT 6
// 107: ( MARK
// 108: X BINUNICODE 'betas'
// 118: q BINPUT 7
// 120: c GLOBAL 'torch._utils _rebuild_tensor_v2'
// 153: q BINPUT 8
// 155: ( MARK
// 156: ( MARK
// 157: X BINUNICODE 'storage'
// 169: q BINPUT 9
// 171: c GLOBAL 'torch FloatStorage'
// 191: q BINPUT 10
// 193: X BINUNICODE '0'
// 199: q BINPUT 11
// 201: X BINUNICODE 'cpu'
// 209: q BINPUT 12
// 211: M BININT2 1000
// 214: t TUPLE (MARK at 156)
// 215: q BINPUT 13
// 217: Q BINPERSID
// 218: K BININT1 0
// 220: M BININT2 1000
// ...............................
// 3201: q BINPUT 250
// 3203: R REDUCE
// 3204: q BINPUT 251
// 3206: X BINUNICODE 'model.diffusion_model.input_blocks.1.1.proj_in.weight'
// 3264: q BINPUT 252
// 3266: h BINGET 8
// 3268: ( MARK
// 3269: ( MARK
// 3270: h BINGET 9
// 3272: h BINGET 10
// 3274: X BINUNICODE '30'
// 3281: q BINPUT 253
// 3283: h BINGET 12
// 3285: J BININT 102400
// 3290: t TUPLE (MARK at 3269)
// 3291: q BINPUT 254
// 3293: Q BINPERSID
// 3294: K BININT1 0
// 3296: ( MARK
// 3297: M BININT2 320
// 3300: M BININT2 320
// 3303: K BININT1 1
// 3305: K BININT1 1
// 3307: t TUPLE (MARK at 3296)
// 3308: q BINPUT 255
// 3310: ( MARK
// 3311: M BININT2 320
// 3314: K BININT1 1
// 3316: K BININT1 1
// 3318: K BININT1 1
// 3320: t TUPLE (MARK at 3310)
// 3321: r LONG_BINPUT 256
// 3326: \x89 NEWFALSE
// 3327: h BINGET 16
// 3329: ) EMPTY_TUPLE
// 3330: R REDUCE
// 3331: r LONG_BINPUT 257
// 3336: t TUPLE (MARK at 3268)
// 3337: r LONG_BINPUT 258
// 3342: R REDUCE
// 3343: r LONG_BINPUT 259
// 3348: X BINUNICODE 'model.diffusion_model.input_blocks.1.1.proj_in.bias'
// 3404: r LONG_BINPUT 260
// 3409: h BINGET 8
// 3411: ( MARK
// 3412: ( MARK
// 3413: h BINGET 9
// 3415: h BINGET 10
// 3417: X BINUNICODE '31'
struct PickleTensorReader {
enum ReadPhase {
READ_NAME,
READ_DATA,
CHECK_SIZE,
READ_DIMENS
};
ReadPhase phase = READ_NAME;
size_t entry_size = 0;
int32_t nelements = 0;
TensorStorage tensor_storage;
static ggml_type global_type; // all pickle_tensors data type
static bool read_global_type;
bool read_int_value(uint32_t value) {
if (phase == CHECK_SIZE) {
if (entry_size == value * ggml_type_size(tensor_storage.type)) {
nelements = value;
phase = READ_DIMENS;
return true;
} else {
phase = READ_NAME;
}
} else if (phase == READ_DIMENS) {
if (tensor_storage.n_dims + 1 > SD_MAX_DIMS) { // too many dimens
phase = READ_NAME;
tensor_storage.n_dims = 0;
}
if (nelements % value == 0) {
tensor_storage.ne[tensor_storage.n_dims] = value;
tensor_storage.n_dims++;
}
}
return false;