add high noise lora support

ggml_extend.hpp

@@ -1113,14 +1113,18 @@ __STATIC_INLINE__ void ggml_backend_tensor_get_and_sync(ggml_backend_t backend,
 }
 
 __STATIC_INLINE__ float ggml_backend_tensor_get_f32(ggml_tensor* tensor) {
-    GGML_ASSERT(tensor->type == GGML_TYPE_F32 || tensor->type == GGML_TYPE_F16);
+    GGML_ASSERT(tensor->type == GGML_TYPE_F32 || tensor->type == GGML_TYPE_F16 || tensor->type == GGML_TYPE_I32);
     float value;
     if (tensor->type == GGML_TYPE_F32) {
         ggml_backend_tensor_get(tensor, &value, 0, sizeof(value));
-    } else {  // GGML_TYPE_F16
+    } else if (tensor->type == GGML_TYPE_F16) {
         ggml_fp16_t f16_value;
         ggml_backend_tensor_get(tensor, &f16_value, 0, sizeof(f16_value));
         value = ggml_fp16_to_fp32(f16_value);
+    } else {  // GGML_TYPE_I32
+        int int32_value;
+        ggml_backend_tensor_get(tensor, &int32_value, 0, sizeof(int32_value));
+        value = (float)int32_value;
     }
     return value;
 }

lora.hpp

@@ -130,7 +130,7 @@ struct LoraModel : public GGMLRunner {
                 // LOG_INFO("skipping LoRA tesnor '%s'", name.c_str());
                 return true;
             }
-            // LOG_INFO("%s", name.c_str());
+            // LOG_INFO("lora_tensor %s", name.c_str());
             for (int i = 0; i < LORA_TYPE_COUNT; i++) {
                 if (name.find(type_fingerprints[i]) != std::string::npos) {
                     type = (lora_t)i;
@@ -781,21 +781,18 @@ struct LoraModel : public GGMLRunner {
 
                         if (lora_tensors.find(lora_up_name) != lora_tensors.end()) {
                             lora_up = to_f32(compute_ctx, lora_tensors[lora_up_name]);
+                            applied_lora_tensors.insert(lora_up_name);
                         }
 
                         if (lora_tensors.find(lora_down_name) != lora_tensors.end()) {
                             lora_down = to_f32(compute_ctx, lora_tensors[lora_down_name]);
+                            applied_lora_tensors.insert(lora_down_name);
                         }
 
                         if (lora_tensors.find(lora_mid_name) != lora_tensors.end()) {
                             lora_mid = to_f32(compute_ctx, lora_tensors[lora_mid_name]);
                             applied_lora_tensors.insert(lora_mid_name);
                         }
-
-                        applied_lora_tensors.insert(lora_up_name);
-                        applied_lora_tensors.insert(lora_down_name);
-                        applied_lora_tensors.insert(alpha_name);
-                        applied_lora_tensors.insert(scale_name);
                     }
 
                     if (lora_up == NULL || lora_down == NULL) {
@@ -806,9 +803,12 @@ struct LoraModel : public GGMLRunner {
                     int64_t rank = lora_down->ne[ggml_n_dims(lora_down) - 1];
                     if (lora_tensors.find(scale_name) != lora_tensors.end()) {
                         scale_value = ggml_backend_tensor_get_f32(lora_tensors[scale_name]);
+                        applied_lora_tensors.insert(scale_name);
                     } else if (lora_tensors.find(alpha_name) != lora_tensors.end()) {
                         float alpha = ggml_backend_tensor_get_f32(lora_tensors[alpha_name]);
                         scale_value = alpha / rank;
+                        // LOG_DEBUG("rank %s %ld %.2f %.2f", alpha_name.c_str(), rank, alpha, scale_value);
+                        applied_lora_tensors.insert(alpha_name);
                     }
 
                     updown = ggml_merge_lora(compute_ctx, lora_down, lora_up, lora_mid);

model.cpp

@@ -607,7 +607,7 @@ std::string convert_tensor_name(std::string name) {
         new_name = "lora." + name;
     } else if (contains(name, "lora_up") || contains(name, "lora_down") ||
                contains(name, "lora.up") || contains(name, "lora.down") ||
-               contains(name, "lora_linear")) {
+               contains(name, "lora_linear") || ends_with(name, ".alpha")) {
         size_t pos = new_name.find(".processor");
         if (pos != std::string::npos) {
             new_name.replace(pos, strlen(".processor"), "");
@@ -615,7 +615,11 @@ std::string convert_tensor_name(std::string name) {
         // if (starts_with(new_name, "transformer.transformer_blocks") || starts_with(new_name, "transformer.single_transformer_blocks")) {
         //     new_name = "model.diffusion_model." + new_name;
         // }
+        if (ends_with(name, ".alpha")) {
+            pos = new_name.rfind("alpha");
+        } else {
             pos = new_name.rfind("lora");
+        }
         if (pos != std::string::npos) {
             std::string name_without_network_parts = new_name.substr(0, pos - 1);
             std::string network_part               = new_name.substr(pos);

stable-diffusion.cpp

@@ -771,8 +771,15 @@ public:
         return result < -1;
     }
 
-    void apply_lora(const std::string& lora_name, float multiplier) {
+    void apply_lora(std::string lora_name, float multiplier) {
         int64_t t0                 = ggml_time_ms();
+        std::string high_noise_tag = "|high_noise|";
+        bool is_high_noise         = false;
+        if (starts_with(lora_name, high_noise_tag)) {
+            lora_name     = lora_name.substr(high_noise_tag.size());
+            is_high_noise = true;
+            LOG_DEBUG("high noise lora: %s", lora_name.c_str());
+        }
         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;
@@ -784,7 +791,7 @@ public:
             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);
+        LoraModel lora(backend, file_path, is_high_noise ? "model.high_noise_" : "");
         if (!lora.load_from_file()) {
             LOG_WARN("load lora tensors from %s failed", file_path.c_str());
             return;