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stable-diffusion.cpp
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#include "ggml_extend.hpp"
#include "model.h"
#include "rng.hpp"
#include "rng_philox.hpp"
#include "stable-diffusion.h"
#include "util.h"
#include "conditioner.hpp"
#include "control.hpp"
#include "denoiser.hpp"
#include "diffusion_model.hpp"
#include "esrgan.hpp"
#include "lora.hpp"
#include "pmid.hpp"
#include "tae.hpp"
#include "vae.hpp"
#define STB_IMAGE_IMPLEMENTATION
#define STB_IMAGE_STATIC
#include "stb_image.h"
// #define STB_IMAGE_WRITE_IMPLEMENTATION
// #define STB_IMAGE_WRITE_STATIC
// #include "stb_image_write.h"
const char* model_version_to_str[] = {
"SD 1.x",
"SD 2.x",
"SDXL",
"SVD",
"SD3.x",
"Flux"};
const char* sampling_methods_str[] = {
"Euler A",
"Euler",
"Heun",
"DPM2",
"DPM++ (2s)",
"DPM++ (2M)",
"modified DPM++ (2M)",
"iPNDM",
"iPNDM_v",
"LCM",
};
/*================================================== Helper Functions ================================================*/
void calculate_alphas_cumprod(float* alphas_cumprod,
float linear_start = 0.00085f,
float linear_end = 0.0120,
int timesteps = TIMESTEPS) {
float ls_sqrt = sqrtf(linear_start);
float le_sqrt = sqrtf(linear_end);
float amount = le_sqrt - ls_sqrt;
float product = 1.0f;
for (int i = 0; i < timesteps; i++) {
float beta = ls_sqrt + amount * ((float)i / (timesteps - 1));
product *= 1.0f - powf(beta, 2.0f);
alphas_cumprod[i] = product;
}
}
/*=============================================== StableDiffusionGGML ================================================*/
class StableDiffusionGGML {
public:
ggml_backend_t backend = NULL; // general backend
ggml_backend_t clip_backend = NULL;
ggml_backend_t control_net_backend = NULL;
ggml_backend_t vae_backend = NULL;
ggml_type model_wtype = GGML_TYPE_COUNT;
ggml_type conditioner_wtype = GGML_TYPE_COUNT;
ggml_type diffusion_model_wtype = GGML_TYPE_COUNT;
ggml_type vae_wtype = GGML_TYPE_COUNT;
SDVersion version;
bool vae_decode_only = false;
bool free_params_immediately = false;
std::shared_ptr<RNG> rng = std::make_shared<STDDefaultRNG>();
int n_threads = -1;
float scale_factor = 0.18215f;
std::shared_ptr<Conditioner> cond_stage_model;
std::shared_ptr<FrozenCLIPVisionEmbedder> clip_vision; // for svd
std::shared_ptr<DiffusionModel> diffusion_model;
std::shared_ptr<AutoEncoderKL> first_stage_model;
std::shared_ptr<TinyAutoEncoder> tae_first_stage;
std::shared_ptr<ControlNet> control_net;
std::shared_ptr<PhotoMakerIDEncoder> pmid_model;
std::shared_ptr<LoraModel> pmid_lora;
std::shared_ptr<PhotoMakerIDEmbed> pmid_id_embeds;
std::string taesd_path;
bool use_tiny_autoencoder = false;
bool vae_tiling = false;
bool stacked_id = false;
std::map<std::string, struct ggml_tensor*> tensors;
std::string lora_model_dir;
// lora_name => multiplier
std::unordered_map<std::string, float> curr_lora_state;
std::shared_ptr<Denoiser> denoiser = std::make_shared<CompVisDenoiser>();
StableDiffusionGGML() = default;
StableDiffusionGGML(int n_threads,
bool vae_decode_only,
bool free_params_immediately,
std::string lora_model_dir,
rng_type_t rng_type)
: n_threads(n_threads),
vae_decode_only(vae_decode_only),
free_params_immediately(free_params_immediately),
lora_model_dir(lora_model_dir) {
if (rng_type == STD_DEFAULT_RNG) {
rng = std::make_shared<STDDefaultRNG>();
} else if (rng_type == CUDA_RNG) {
rng = std::make_shared<PhiloxRNG>();
}
}
~StableDiffusionGGML() {
if (clip_backend != backend) {
ggml_backend_free(clip_backend);
}
if (control_net_backend != backend) {
ggml_backend_free(control_net_backend);
}
if (vae_backend != backend) {
ggml_backend_free(vae_backend);
}
ggml_backend_free(backend);
}
bool load_from_file(const std::string& model_path,
const std::string& clip_l_path,
const std::string& clip_g_path,
const std::string& t5xxl_path,
const std::string& diffusion_model_path,
const std::string& vae_path,
const std::string control_net_path,
const std::string embeddings_path,
const std::string id_embeddings_path,
const std::string& taesd_path,
bool vae_tiling_,
ggml_type wtype,
schedule_t schedule,
bool clip_on_cpu,
bool control_net_cpu,
bool vae_on_cpu,
bool diffusion_flash_attn) {
use_tiny_autoencoder = taesd_path.size() > 0;
#ifdef SD_USE_CUBLAS
LOG_DEBUG("Using CUDA backend");
backend = ggml_backend_cuda_init(0);
#endif
#ifdef SD_USE_METAL
LOG_DEBUG("Using Metal backend");
ggml_backend_metal_log_set_callback(ggml_log_callback_default, nullptr);
backend = ggml_backend_metal_init();
#endif
#ifdef SD_USE_VULKAN
LOG_DEBUG("Using Vulkan backend");
for (int device = 0; device < ggml_backend_vk_get_device_count(); ++device) {
backend = ggml_backend_vk_init(device);
}
if (!backend) {
LOG_WARN("Failed to initialize Vulkan backend");
}
#endif
#ifdef SD_USE_SYCL
LOG_DEBUG("Using SYCL backend");
backend = ggml_backend_sycl_init(0);
#endif
if (!backend) {
LOG_DEBUG("Using CPU backend");
backend = ggml_backend_cpu_init();
}
ModelLoader model_loader;
vae_tiling = vae_tiling_;
if (model_path.size() > 0) {
LOG_INFO("loading model from '%s'", model_path.c_str());
if (!model_loader.init_from_file(model_path)) {
LOG_ERROR("init model loader from file failed: '%s'", model_path.c_str());
}
}
if (clip_l_path.size() > 0) {
LOG_INFO("loading clip_l from '%s'", clip_l_path.c_str());
if (!model_loader.init_from_file(clip_l_path, "text_encoders.clip_l.transformer.")) {
LOG_WARN("loading clip_l from '%s' failed", clip_l_path.c_str());
}
}
if (clip_g_path.size() > 0) {
LOG_INFO("loading clip_g from '%s'", clip_g_path.c_str());
if (!model_loader.init_from_file(clip_g_path, "text_encoders.clip_g.transformer.")) {
LOG_WARN("loading clip_g from '%s' failed", clip_g_path.c_str());
}
}
if (t5xxl_path.size() > 0) {
LOG_INFO("loading t5xxl from '%s'", t5xxl_path.c_str());
if (!model_loader.init_from_file(t5xxl_path, "text_encoders.t5xxl.transformer.")) {
LOG_WARN("loading t5xxl from '%s' failed", t5xxl_path.c_str());
}
}
if (diffusion_model_path.size() > 0) {
LOG_INFO("loading diffusion model from '%s'", diffusion_model_path.c_str());
if (!model_loader.init_from_file(diffusion_model_path, "model.diffusion_model.")) {
LOG_WARN("loading diffusion model from '%s' failed", diffusion_model_path.c_str());
}
}
if (vae_path.size() > 0) {
LOG_INFO("loading vae from '%s'", vae_path.c_str());
if (!model_loader.init_from_file(vae_path, "vae.")) {
LOG_WARN("loading vae from '%s' failed", vae_path.c_str());
}
}
version = model_loader.get_sd_version();
if (version == VERSION_COUNT) {
LOG_ERROR("get sd version from file failed: '%s'", model_path.c_str());
return false;
}
LOG_INFO("Version: %s ", model_version_to_str[version]);
if (wtype == GGML_TYPE_COUNT) {
model_wtype = model_loader.get_sd_wtype();
if (model_wtype == GGML_TYPE_COUNT) {
model_wtype = GGML_TYPE_F32;
LOG_WARN("can not get mode wtype frome weight, use f32");
}
conditioner_wtype = model_loader.get_conditioner_wtype();
if (conditioner_wtype == GGML_TYPE_COUNT) {
conditioner_wtype = wtype;
}
diffusion_model_wtype = model_loader.get_diffusion_model_wtype();
if (diffusion_model_wtype == GGML_TYPE_COUNT) {
diffusion_model_wtype = wtype;
}
vae_wtype = model_loader.get_vae_wtype();
if (vae_wtype == GGML_TYPE_COUNT) {
vae_wtype = wtype;
}
} else {
model_wtype = wtype;
conditioner_wtype = wtype;
diffusion_model_wtype = wtype;
vae_wtype = wtype;
model_loader.set_wtype_override(wtype);
}
if (version == VERSION_SDXL) {
vae_wtype = GGML_TYPE_F32;
model_loader.set_wtype_override(GGML_TYPE_F32, "vae.");
}
LOG_INFO("Weight type: %s", model_wtype != SD_TYPE_COUNT ? ggml_type_name(model_wtype) : "??");
LOG_INFO("Conditioner weight type: %s", conditioner_wtype != SD_TYPE_COUNT ? ggml_type_name(conditioner_wtype) : "??");
LOG_INFO("Diffusion model weight type: %s", diffusion_model_wtype != SD_TYPE_COUNT ? ggml_type_name(diffusion_model_wtype) : "??");
LOG_INFO("VAE weight type: %s", vae_wtype != SD_TYPE_COUNT ? ggml_type_name(vae_wtype) : "??");
LOG_DEBUG("ggml tensor size = %d bytes", (int)sizeof(ggml_tensor));
if (version == VERSION_SDXL) {
scale_factor = 0.13025f;
if (vae_path.size() == 0 && taesd_path.size() == 0) {
LOG_WARN(
"!!!It looks like you are using SDXL model. "
"If you find that the generated images are completely black, "
"try specifying SDXL VAE FP16 Fix with the --vae parameter. "
"You can find it here: https://huggingface.co/madebyollin/sdxl-vae-fp16-fix/blob/main/sdxl_vae.safetensors");
}
} else if (sd_version_is_sd3(version)) {
scale_factor = 1.5305f;
} else if (sd_version_is_flux(version)) {
scale_factor = 0.3611;
// TODO: shift_factor
}
if (version == VERSION_SVD) {
clip_vision = std::make_shared<FrozenCLIPVisionEmbedder>(backend, model_loader.tensor_storages_types);
clip_vision->alloc_params_buffer();
clip_vision->get_param_tensors(tensors);
diffusion_model = std::make_shared<UNetModel>(backend, model_loader.tensor_storages_types, version);
diffusion_model->alloc_params_buffer();
diffusion_model->get_param_tensors(tensors);
first_stage_model = std::make_shared<AutoEncoderKL>(backend, model_loader.tensor_storages_types, "first_stage_model", vae_decode_only, true, version);
LOG_DEBUG("vae_decode_only %d", vae_decode_only);
first_stage_model->alloc_params_buffer();
first_stage_model->get_param_tensors(tensors, "first_stage_model");
} else {
clip_backend = backend;
bool use_t5xxl = false;
if (sd_version_is_dit(version)) {
use_t5xxl = true;
}
if (!ggml_backend_is_cpu(backend) && use_t5xxl && conditioner_wtype != GGML_TYPE_F32) {
clip_on_cpu = true;
LOG_INFO("set clip_on_cpu to true");
}
if (clip_on_cpu && !ggml_backend_is_cpu(backend)) {
LOG_INFO("CLIP: Using CPU backend");
clip_backend = ggml_backend_cpu_init();
}
if (diffusion_flash_attn) {
LOG_INFO("Using flash attention in the diffusion model");
}
if (sd_version_is_sd3(version)) {
if (diffusion_flash_attn) {
LOG_WARN("flash attention in this diffusion model is currently unsupported!");
}
cond_stage_model = std::make_shared<SD3CLIPEmbedder>(clip_backend, model_loader.tensor_storages_types);
diffusion_model = std::make_shared<MMDiTModel>(backend, model_loader.tensor_storages_types);
} else if (sd_version_is_flux(version)) {
cond_stage_model = std::make_shared<FluxCLIPEmbedder>(clip_backend, model_loader.tensor_storages_types);
diffusion_model = std::make_shared<FluxModel>(backend, model_loader.tensor_storages_types, diffusion_flash_attn);
} else {
if (id_embeddings_path.find("v2") != std::string::npos) {
cond_stage_model = std::make_shared<FrozenCLIPEmbedderWithCustomWords>(clip_backend, model_loader.tensor_storages_types, embeddings_path, version, PM_VERSION_2);
} else {
cond_stage_model = std::make_shared<FrozenCLIPEmbedderWithCustomWords>(clip_backend, model_loader.tensor_storages_types, embeddings_path, version);
}
diffusion_model = std::make_shared<UNetModel>(backend, model_loader.tensor_storages_types, version, diffusion_flash_attn);
}
cond_stage_model->alloc_params_buffer();
cond_stage_model->get_param_tensors(tensors);
diffusion_model->alloc_params_buffer();
diffusion_model->get_param_tensors(tensors);
if (!use_tiny_autoencoder) {
if (vae_on_cpu && !ggml_backend_is_cpu(backend)) {
LOG_INFO("VAE Autoencoder: Using CPU backend");
vae_backend = ggml_backend_cpu_init();
} else {
vae_backend = backend;
}
first_stage_model = std::make_shared<AutoEncoderKL>(vae_backend, model_loader.tensor_storages_types, "first_stage_model", vae_decode_only, false, version);
first_stage_model->alloc_params_buffer();
first_stage_model->get_param_tensors(tensors, "first_stage_model");
} else {
tae_first_stage = std::make_shared<TinyAutoEncoder>(backend, model_loader.tensor_storages_types, "decoder.layers", vae_decode_only);
}
// first_stage_model->get_param_tensors(tensors, "first_stage_model.");
if (control_net_path.size() > 0) {
ggml_backend_t controlnet_backend = NULL;
if (control_net_cpu && !ggml_backend_is_cpu(backend)) {
LOG_DEBUG("ControlNet: Using CPU backend");
controlnet_backend = ggml_backend_cpu_init();
} else {
controlnet_backend = backend;
}
control_net = std::make_shared<ControlNet>(controlnet_backend, model_loader.tensor_storages_types, version);
}
if (id_embeddings_path.find("v2") != std::string::npos) {
pmid_model = std::make_shared<PhotoMakerIDEncoder>(backend, model_loader.tensor_storages_types, "pmid", version, PM_VERSION_2);
LOG_INFO("using PhotoMaker Version 2");
} else {
pmid_model = std::make_shared<PhotoMakerIDEncoder>(backend, model_loader.tensor_storages_types, "pmid", version);
}
if (id_embeddings_path.size() > 0) {
pmid_lora = std::make_shared<LoraModel>(backend, id_embeddings_path, "");
if (!pmid_lora->load_from_file(true)) {
LOG_WARN("load photomaker lora tensors from %s failed", id_embeddings_path.c_str());
return false;
}
LOG_INFO("loading stacked ID embedding (PHOTOMAKER) model file from '%s'", id_embeddings_path.c_str());
if (!model_loader.init_from_file(id_embeddings_path, "pmid.")) {
LOG_WARN("loading stacked ID embedding from '%s' failed", id_embeddings_path.c_str());
} else {
stacked_id = true;
}
}
if (stacked_id) {
if (!pmid_model->alloc_params_buffer()) {
LOG_ERROR(" pmid model params buffer allocation failed");
return false;
}
pmid_model->get_param_tensors(tensors, "pmid");
}
}
struct ggml_init_params params;
params.mem_size = static_cast<size_t>(10 * 1024) * 1024; // 10M
params.mem_buffer = NULL;
params.no_alloc = false;
// LOG_DEBUG("mem_size %u ", params.mem_size);
struct ggml_context* ctx = ggml_init(params); // for alphas_cumprod and is_using_v_parameterization check
GGML_ASSERT(ctx != NULL);
ggml_tensor* alphas_cumprod_tensor = ggml_new_tensor_1d(ctx, GGML_TYPE_F32, TIMESTEPS);
calculate_alphas_cumprod((float*)alphas_cumprod_tensor->data);
// load weights
LOG_DEBUG("loading weights");
int64_t t0 = ggml_time_ms();
std::set<std::string> ignore_tensors;
tensors["alphas_cumprod"] = alphas_cumprod_tensor;
if (use_tiny_autoencoder) {
ignore_tensors.insert("first_stage_model.");
}
if (stacked_id) {
ignore_tensors.insert("lora.");
}
if (vae_decode_only) {
ignore_tensors.insert("first_stage_model.encoder");
ignore_tensors.insert("first_stage_model.quant");
}
if (version == VERSION_SVD) {
ignore_tensors.insert("conditioner.embedders.3");
}
bool success = model_loader.load_tensors(tensors, backend, ignore_tensors);
if (!success) {
LOG_ERROR("load tensors from model loader failed");
ggml_free(ctx);
return false;
}
// LOG_DEBUG("model size = %.2fMB", total_size / 1024.0 / 1024.0);
if (version == VERSION_SVD) {
// diffusion_model->test();
// first_stage_model->test();
// return false;
} else {
size_t clip_params_mem_size = cond_stage_model->get_params_buffer_size();
size_t unet_params_mem_size = diffusion_model->get_params_buffer_size();
size_t vae_params_mem_size = 0;
if (!use_tiny_autoencoder) {
vae_params_mem_size = first_stage_model->get_params_buffer_size();
} else {
if (!tae_first_stage->load_from_file(taesd_path)) {
return false;
}
vae_params_mem_size = tae_first_stage->get_params_buffer_size();
}
size_t control_net_params_mem_size = 0;
if (control_net) {
if (!control_net->load_from_file(control_net_path)) {
return false;
}
control_net_params_mem_size = control_net->get_params_buffer_size();
}
size_t pmid_params_mem_size = 0;
if (stacked_id) {
pmid_params_mem_size = pmid_model->get_params_buffer_size();
}
size_t total_params_ram_size = 0;
size_t total_params_vram_size = 0;
if (ggml_backend_is_cpu(clip_backend)) {
total_params_ram_size += clip_params_mem_size + pmid_params_mem_size;
} else {
total_params_vram_size += clip_params_mem_size + pmid_params_mem_size;
}
if (ggml_backend_is_cpu(backend)) {
total_params_ram_size += unet_params_mem_size;
} else {
total_params_vram_size += unet_params_mem_size;
}
if (ggml_backend_is_cpu(vae_backend)) {
total_params_ram_size += vae_params_mem_size;
} else {
total_params_vram_size += vae_params_mem_size;
}
if (ggml_backend_is_cpu(control_net_backend)) {
total_params_ram_size += control_net_params_mem_size;
} else {
total_params_vram_size += control_net_params_mem_size;
}
size_t total_params_size = total_params_ram_size + total_params_vram_size;
LOG_INFO(
"total params memory size = %.2fMB (VRAM %.2fMB, RAM %.2fMB): "
"clip %.2fMB(%s), unet %.2fMB(%s), vae %.2fMB(%s), controlnet %.2fMB(%s), pmid %.2fMB(%s)",
total_params_size / 1024.0 / 1024.0,
total_params_vram_size / 1024.0 / 1024.0,
total_params_ram_size / 1024.0 / 1024.0,
clip_params_mem_size / 1024.0 / 1024.0,
ggml_backend_is_cpu(clip_backend) ? "RAM" : "VRAM",
unet_params_mem_size / 1024.0 / 1024.0,
ggml_backend_is_cpu(backend) ? "RAM" : "VRAM",
vae_params_mem_size / 1024.0 / 1024.0,
ggml_backend_is_cpu(vae_backend) ? "RAM" : "VRAM",
control_net_params_mem_size / 1024.0 / 1024.0,
ggml_backend_is_cpu(control_net_backend) ? "RAM" : "VRAM",
pmid_params_mem_size / 1024.0 / 1024.0,
ggml_backend_is_cpu(clip_backend) ? "RAM" : "VRAM");
}
int64_t t1 = ggml_time_ms();
LOG_INFO("loading model from '%s' completed, taking %.2fs", model_path.c_str(), (t1 - t0) * 1.0f / 1000);
// check is_using_v_parameterization_for_sd2
bool is_using_v_parameterization = false;
if (version == VERSION_SD2) {
if (is_using_v_parameterization_for_sd2(ctx)) {
is_using_v_parameterization = true;
}
} else if (version == VERSION_SVD) {
// TODO: V_PREDICTION_EDM
is_using_v_parameterization = true;
}
if (sd_version_is_sd3(version)) {
LOG_INFO("running in FLOW mode");
denoiser = std::make_shared<DiscreteFlowDenoiser>();
} else if (sd_version_is_flux(version)) {
LOG_INFO("running in Flux FLOW mode");
float shift = 1.0f; // TODO: validate
for (auto pair : model_loader.tensor_storages_types) {
if (pair.first.find("model.diffusion_model.guidance_in.in_layer.weight") != std::string::npos) {
shift = 1.15f;
break;
}
}
denoiser = std::make_shared<FluxFlowDenoiser>(shift);
} else if (is_using_v_parameterization) {
LOG_INFO("running in v-prediction mode");
denoiser = std::make_shared<CompVisVDenoiser>();
} else {
LOG_INFO("running in eps-prediction mode");
}
if (schedule != DEFAULT) {
switch (schedule) {
case DISCRETE:
LOG_INFO("running with discrete schedule");
denoiser->schedule = std::make_shared<DiscreteSchedule>();
break;
case KARRAS:
LOG_INFO("running with Karras schedule");
denoiser->schedule = std::make_shared<KarrasSchedule>();
break;
case EXPONENTIAL:
LOG_INFO("running exponential schedule");
denoiser->schedule = std::make_shared<ExponentialSchedule>();
break;
case AYS:
LOG_INFO("Running with Align-Your-Steps schedule");
denoiser->schedule = std::make_shared<AYSSchedule>();
denoiser->schedule->version = version;
break;
case GITS:
LOG_INFO("Running with GITS schedule");
denoiser->schedule = std::make_shared<GITSSchedule>();
denoiser->schedule->version = version;
break;
case DEFAULT:
// Don't touch anything.
break;
default:
LOG_ERROR("Unknown schedule %i", schedule);
abort();
}
}
auto comp_vis_denoiser = std::dynamic_pointer_cast<CompVisDenoiser>(denoiser);
if (comp_vis_denoiser) {
for (int i = 0; i < TIMESTEPS; i++) {
comp_vis_denoiser->sigmas[i] = std::sqrt((1 - ((float*)alphas_cumprod_tensor->data)[i]) / ((float*)alphas_cumprod_tensor->data)[i]);
comp_vis_denoiser->log_sigmas[i] = std::log(comp_vis_denoiser->sigmas[i]);
}
}
LOG_DEBUG("finished loaded file");
ggml_free(ctx);
return true;
}
bool is_using_v_parameterization_for_sd2(ggml_context* work_ctx) {
struct ggml_tensor* x_t = ggml_new_tensor_4d(work_ctx, GGML_TYPE_F32, 8, 8, 4, 1);
ggml_set_f32(x_t, 0.5);
struct ggml_tensor* c = ggml_new_tensor_4d(work_ctx, GGML_TYPE_F32, 1024, 2, 1, 1);
ggml_set_f32(c, 0.5);
struct ggml_tensor* timesteps = ggml_new_tensor_1d(work_ctx, GGML_TYPE_F32, 1);
ggml_set_f32(timesteps, 999);
int64_t t0 = ggml_time_ms();
struct ggml_tensor* out = ggml_dup_tensor(work_ctx, x_t);
diffusion_model->compute(n_threads, x_t, timesteps, c, NULL, NULL, NULL, -1, {}, 0.f, &out);
diffusion_model->free_compute_buffer();
double result = 0.f;
{
float* vec_x = (float*)x_t->data;
float* vec_out = (float*)out->data;
int64_t n = ggml_nelements(out);
for (int i = 0; i < n; i++) {
result += ((double)vec_out[i] - (double)vec_x[i]);
}
result /= n;
}
int64_t t1 = ggml_time_ms();
LOG_DEBUG("check is_using_v_parameterization_for_sd2, taking %.2fs", (t1 - t0) * 1.0f / 1000);
return result < -1;
}
void apply_lora(const std::string& lora_name, float multiplier) {
int64_t t0 = ggml_time_ms();
std::string st_file_path = path_join(lora_model_dir, lora_name + ".safetensors");
std::string ckpt_file_path = path_join(lora_model_dir, lora_name + ".ckpt");
std::string file_path;
if (file_exists(st_file_path)) {
file_path = st_file_path;
} else if (file_exists(ckpt_file_path)) {
file_path = ckpt_file_path;
} else {
LOG_WARN("can not find %s or %s for lora %s", st_file_path.c_str(), ckpt_file_path.c_str(), lora_name.c_str());
return;
}
LoraModel lora(backend, file_path);
if (!lora.load_from_file()) {
LOG_WARN("load lora tensors from %s failed", file_path.c_str());
return;
}
lora.multiplier = multiplier;
lora.apply(tensors, n_threads);
lora.free_params_buffer();
int64_t t1 = ggml_time_ms();
LOG_INFO("lora '%s' applied, taking %.2fs", lora_name.c_str(), (t1 - t0) * 1.0f / 1000);
}
void apply_loras(const std::unordered_map<std::string, float>& lora_state) {
if (lora_state.size() > 0 && model_wtype != GGML_TYPE_F16 && model_wtype != GGML_TYPE_F32) {
LOG_WARN("In quantized models when applying LoRA, the images have poor quality.");
}
std::unordered_map<std::string, float> lora_state_diff;
for (auto& kv : lora_state) {
const std::string& lora_name = kv.first;
float multiplier = kv.second;
if (curr_lora_state.find(lora_name) != curr_lora_state.end()) {
float curr_multiplier = curr_lora_state[lora_name];
float multiplier_diff = multiplier - curr_multiplier;
if (multiplier_diff != 0.f) {
lora_state_diff[lora_name] = multiplier_diff;
}
} else {
lora_state_diff[lora_name] = multiplier;
}
}
LOG_INFO("Attempting to apply %lu LoRAs", lora_state.size());
for (auto& kv : lora_state_diff) {
apply_lora(kv.first, kv.second);
}
curr_lora_state = lora_state;
}
ggml_tensor* id_encoder(ggml_context* work_ctx,
ggml_tensor* init_img,
ggml_tensor* prompts_embeds,
ggml_tensor* id_embeds,
std::vector<bool>& class_tokens_mask) {
ggml_tensor* res = NULL;
pmid_model->compute(n_threads, init_img, prompts_embeds, id_embeds, class_tokens_mask, &res, work_ctx);
return res;
}
SDCondition get_svd_condition(ggml_context* work_ctx,
sd_image_t init_image,
int width,
int height,
int fps = 6,
int motion_bucket_id = 127,
float augmentation_level = 0.f,
bool force_zero_embeddings = false) {
// c_crossattn
int64_t t0 = ggml_time_ms();
struct ggml_tensor* c_crossattn = NULL;
{
if (force_zero_embeddings) {
c_crossattn = ggml_new_tensor_1d(work_ctx, GGML_TYPE_F32, clip_vision->vision_model.projection_dim);
ggml_set_f32(c_crossattn, 0.f);
} else {
sd_image_f32_t image = sd_image_t_to_sd_image_f32_t(init_image);
sd_image_f32_t resized_image = clip_preprocess(image, clip_vision->vision_model.image_size);
free(image.data);
image.data = NULL;
ggml_tensor* pixel_values = ggml_new_tensor_4d(work_ctx, GGML_TYPE_F32, resized_image.width, resized_image.height, 3, 1);
sd_image_f32_to_tensor(resized_image.data, pixel_values, false);
free(resized_image.data);
resized_image.data = NULL;
// print_ggml_tensor(pixel_values);
clip_vision->compute(n_threads, pixel_values, &c_crossattn, work_ctx);
// print_ggml_tensor(c_crossattn);
}
}
// c_concat
struct ggml_tensor* c_concat = NULL;
{
if (force_zero_embeddings) {
c_concat = ggml_new_tensor_4d(work_ctx, GGML_TYPE_F32, width / 8, height / 8, 4, 1);
ggml_set_f32(c_concat, 0.f);
} else {
ggml_tensor* init_img = ggml_new_tensor_4d(work_ctx, GGML_TYPE_F32, width, height, 3, 1);
if (width != init_image.width || height != init_image.height) {
sd_image_f32_t image = sd_image_t_to_sd_image_f32_t(init_image);
sd_image_f32_t resized_image = resize_sd_image_f32_t(image, width, height);
free(image.data);
image.data = NULL;
sd_image_f32_to_tensor(resized_image.data, init_img, false);
free(resized_image.data);
resized_image.data = NULL;
} else {
sd_image_to_tensor(init_image.data, init_img);
}
if (augmentation_level > 0.f) {
struct ggml_tensor* noise = ggml_dup_tensor(work_ctx, init_img);
ggml_tensor_set_f32_randn(noise, rng);
// encode_pixels += torch.randn_like(pixels) * augmentation_level
ggml_tensor_scale(noise, augmentation_level);
ggml_tensor_add(init_img, noise);
}
ggml_tensor* moments = encode_first_stage(work_ctx, init_img);
c_concat = get_first_stage_encoding(work_ctx, moments);
}
}
// y
struct ggml_tensor* y = NULL;
{
y = ggml_new_tensor_1d(work_ctx, GGML_TYPE_F32, diffusion_model->get_adm_in_channels());
int out_dim = 256;
int fps_id = fps - 1;
std::vector<float> timesteps = {(float)fps_id, (float)motion_bucket_id, augmentation_level};
set_timestep_embedding(timesteps, y, out_dim);
}
int64_t t1 = ggml_time_ms();
LOG_DEBUG("computing svd condition graph completed, taking %" PRId64 " ms", t1 - t0);
return {c_crossattn, y, c_concat};
}
ggml_tensor* sample(ggml_context* work_ctx,
ggml_tensor* init_latent,
ggml_tensor* noise,
SDCondition cond,
SDCondition uncond,
ggml_tensor* control_hint,
float control_strength,
float min_cfg,
float cfg_scale,
float guidance,
sample_method_t method,
const std::vector<float>& sigmas,
int start_merge_step,
SDCondition id_cond,
std::vector<int> skip_layers = {},
float slg_scale = 0,
float skip_layer_start = 0.01,
float skip_layer_end = 0.2) {
size_t steps = sigmas.size() - 1;
// noise = load_tensor_from_file(work_ctx, "./rand0.bin");
// print_ggml_tensor(noise);
struct ggml_tensor* x = ggml_dup_tensor(work_ctx, init_latent);
copy_ggml_tensor(x, init_latent);
x = denoiser->noise_scaling(sigmas[0], noise, x);
struct ggml_tensor* noised_input = ggml_dup_tensor(work_ctx, noise);
bool has_unconditioned = cfg_scale != 1.0 && uncond.c_crossattn != NULL;
bool has_skiplayer = slg_scale != 0.0 && skip_layers.size() > 0;
// denoise wrapper
struct ggml_tensor* out_cond = ggml_dup_tensor(work_ctx, x);
struct ggml_tensor* out_uncond = NULL;
struct ggml_tensor* out_skip = NULL;
if (has_unconditioned) {
out_uncond = ggml_dup_tensor(work_ctx, x);
}
if (has_skiplayer) {
if (sd_version_is_dit(version)) {
out_skip = ggml_dup_tensor(work_ctx, x);
} else {
has_skiplayer = false;
LOG_WARN("SLG is incompatible with %s models", model_version_to_str[version]);
}
}
struct ggml_tensor* denoised = ggml_dup_tensor(work_ctx, x);
auto denoise = [&](ggml_tensor* input, float sigma, int step) -> ggml_tensor* {
if (step == 1) {
pretty_progress(0, (int)steps, 0);
}
int64_t t0 = ggml_time_us();
std::vector<float> scaling = denoiser->get_scalings(sigma);
GGML_ASSERT(scaling.size() == 3);
float c_skip = scaling[0];
float c_out = scaling[1];
float c_in = scaling[2];
float t = denoiser->sigma_to_t(sigma);
std::vector<float> timesteps_vec(x->ne[3], t); // [N, ]
auto timesteps = vector_to_ggml_tensor(work_ctx, timesteps_vec);
std::vector<float> guidance_vec(x->ne[3], guidance);
auto guidance_tensor = vector_to_ggml_tensor(work_ctx, guidance_vec);
copy_ggml_tensor(noised_input, input);
// noised_input = noised_input * c_in
ggml_tensor_scale(noised_input, c_in);
std::vector<struct ggml_tensor*> controls;
if (control_hint != NULL) {
control_net->compute(n_threads, noised_input, control_hint, timesteps, cond.c_crossattn, cond.c_vector);
controls = control_net->controls;
// print_ggml_tensor(controls[12]);
// GGML_ASSERT(0);
}
if (start_merge_step == -1 || step <= start_merge_step) {
// cond
diffusion_model->compute(n_threads,
noised_input,
timesteps,
cond.c_crossattn,
cond.c_concat,
cond.c_vector,
guidance_tensor,
-1,
controls,
control_strength,
&out_cond);
} else {
diffusion_model->compute(n_threads,
noised_input,
timesteps,
id_cond.c_crossattn,
cond.c_concat,
id_cond.c_vector,
guidance_tensor,
-1,
controls,
control_strength,
&out_cond);
}
float* negative_data = NULL;
if (has_unconditioned) {
// uncond
if (control_hint != NULL) {
control_net->compute(n_threads, noised_input, control_hint, timesteps, uncond.c_crossattn, uncond.c_vector);
controls = control_net->controls;
}
diffusion_model->compute(n_threads,
noised_input,
timesteps,
uncond.c_crossattn,
uncond.c_concat,
uncond.c_vector,
guidance_tensor,
-1,
controls,
control_strength,
&out_uncond);
negative_data = (float*)out_uncond->data;
}
int step_count = sigmas.size();
bool is_skiplayer_step = has_skiplayer && step > (int)(skip_layer_start * step_count) && step < (int)(skip_layer_end * step_count);
float* skip_layer_data = NULL;
if (is_skiplayer_step) {
LOG_DEBUG("Skipping layers at step %d\n", step);
// skip layer (same as conditionned)
diffusion_model->compute(n_threads,
noised_input,
timesteps,
cond.c_crossattn,
cond.c_concat,
cond.c_vector,
guidance_tensor,
-1,
controls,
control_strength,
&out_skip,
NULL,
skip_layers);
skip_layer_data = (float*)out_skip->data;
}
float* vec_denoised = (float*)denoised->data;
float* vec_input = (float*)input->data;
float* positive_data = (float*)out_cond->data;
int ne_elements = (int)ggml_nelements(denoised);
for (int i = 0; i < ne_elements; i++) {
float latent_result = positive_data[i];
if (has_unconditioned) {
// out_uncond + cfg_scale * (out_cond - out_uncond)
int64_t ne3 = out_cond->ne[3];
if (min_cfg != cfg_scale && ne3 != 1) {
int64_t i3 = i / out_cond->ne[0] * out_cond->ne[1] * out_cond->ne[2];
float scale = min_cfg + (cfg_scale - min_cfg) * (i3 * 1.0f / ne3);
} else {
latent_result = negative_data[i] + cfg_scale * (positive_data[i] - negative_data[i]);
}
}
if (is_skiplayer_step) {
latent_result = latent_result + (positive_data[i] - skip_layer_data[i]) * slg_scale;
}
// v = latent_result, eps = latent_result
// denoised = (v * c_out + input * c_skip) or (input + eps * c_out)
vec_denoised[i] = latent_result * c_out + vec_input[i] * c_skip;
}
int64_t t1 = ggml_time_us();
if (step > 0) {
pretty_progress(step, (int)steps, (t1 - t0) / 1000000.f);
// LOG_INFO("step %d sampling completed taking %.2fs", step, (t1 - t0) * 1.0f / 1000000);
}
return denoised;
};
sample_k_diffusion(method, denoise, work_ctx, x, sigmas, rng);
x = denoiser->inverse_noise_scaling(sigmas[sigmas.size() - 1], x);
if (control_net) {
control_net->free_control_ctx();
control_net->free_compute_buffer();
}
diffusion_model->free_compute_buffer();
return x;
}
// ldm.models.diffusion.ddpm.LatentDiffusion.get_first_stage_encoding
ggml_tensor* get_first_stage_encoding(ggml_context* work_ctx, ggml_tensor* moments) {
// ldm.modules.distributions.distributions.DiagonalGaussianDistribution.sample
ggml_tensor* latent = ggml_new_tensor_4d(work_ctx, moments->type, moments->ne[0], moments->ne[1], moments->ne[2] / 2, moments->ne[3]);
struct ggml_tensor* noise = ggml_dup_tensor(work_ctx, latent);
ggml_tensor_set_f32_randn(noise, rng);
// noise = load_tensor_from_file(work_ctx, "noise.bin");
{
float mean = 0;
float logvar = 0;
float value = 0;
float std_ = 0;
for (int i = 0; i < latent->ne[3]; i++) {
for (int j = 0; j < latent->ne[2]; j++) {
for (int k = 0; k < latent->ne[1]; k++) {
for (int l = 0; l < latent->ne[0]; l++) {
mean = ggml_tensor_get_f32(moments, l, k, j, i);
logvar = ggml_tensor_get_f32(moments, l, k, j + (int)latent->ne[2], i);
logvar = std::max(-30.0f, std::min(logvar, 20.0f));
std_ = std::exp(0.5f * logvar);
value = mean + std_ * ggml_tensor_get_f32(noise, l, k, j, i);
value = value * scale_factor;
// printf("%d %d %d %d -> %f\n", i, j, k, l, value);
ggml_tensor_set_f32(latent, value, l, k, j, i);
}
}
}
}
}
return latent;
}
ggml_tensor* compute_first_stage(ggml_context* work_ctx, ggml_tensor* x, bool decode) {
int64_t W = x->ne[0];
int64_t H = x->ne[1];
int64_t C = 8;
if (use_tiny_autoencoder) {
C = 4;
} else {
if (sd_version_is_sd3(version)) {