refactor: centralize model factories and defaults (#2198)

src/model/integrations/pid.cpp

@@ -0,0 +1,44 @@
+#include "model/diffusion/pid.hpp"
+#include "conditioning/conditioner.hpp"
+#include "model_definition.h"
+#include "pipeline/model_builders.h"
+
+static bool build_pid(const sd::model_builders::Context& ctx, const TokenizerConfig& tokenizers, sd::model_builders::CoreRunners& result) {
+    const auto* sd_ctx_params      = &ctx.params;
+    const auto& tensor_storage_map = ctx.tensor_storage_map;
+    const auto version             = ctx.version;
+    const auto& weight_manager     = ctx.weight_manager;
+    result.conditioner             = std::make_shared<LLMEmbedder>(ctx.backends.runtime_backend(SDBackendModule::TE),
+                                                       tensor_storage_map,
+                                                       version,
+                                                       "",
+                                                       false,
+                                                       weight_manager,
+                                                       tokenizers);
+    result.diffusion               = std::make_shared<Pid::PiDRunner>(ctx.backends.runtime_backend(SDBackendModule::DIFFUSION),
+                                                        tensor_storage_map,
+                                                        "model.diffusion_model.net",
+                                                        weight_manager);
+    return true;
+}
+
+const std::vector<ModelDefinition>& pid_definitions() {
+    static const std::vector<ModelDefinition> definitions = [] {
+        std::vector<ModelDefinition> result;
+        {
+            ModelDefinition definition;
+            definition.version                        = VERSION_PID;
+            definition.geometry                       = {1, 3, 3};
+            definition.name                           = "PiD";
+            definition.traits.is_dit                  = true;
+            definition.traits.vae_format_override     = true;
+            definition.sampling                       = {FLOW_PRED, 1.5f};
+            definition.sampling.default_sample_method = LCM_SAMPLE_METHOD;
+            definition.sampling.default_scheduler     = DISCRETE_SCHEDULER;
+            definition.build                          = build_pid;
+            result.push_back(std::move(definition));
+        }
+        return result;
+    }();
+    return definitions;
+}