Fix token length

Author: stduhpf

conditioner.hpp

@@ -1728,6 +1728,8 @@ struct LLMEmbedder : public Conditioner {
         std::vector<std::pair<int, ggml_tensor*>> image_embeds;
         std::pair<int, int> prompt_attn_range;
         int prompt_template_encode_start_idx = 34;
+        int max_length = 0;
+        bool pad = false;
         std::set<int> out_layers;
         if (llm->enable_vision && conditioner_params.ref_images.size() > 0) {
             LOG_INFO("QwenImageEditPlusPipeline");
@@ -1828,6 +1830,8 @@ struct LLMEmbedder : public Conditioner {
         } else if (sd_version_is_longcat(version)) {
             prompt_template_encode_start_idx = 36;
             // prompt_template_encode_end_idx = 5;
+            max_length = 512;
+            pad = true;
 
             prompt = "<|im_start|>system\nAs an image captioning expert, generate a descriptive text prompt based on an image content, suitable for input to a text-to-image model.<|im_end|>\n<|im_start|>user\n";
 
@@ -1848,7 +1852,7 @@ struct LLMEmbedder : public Conditioner {
             prompt += "<|im_end|>\n<|im_start|>assistant\n";
         }
 
-        auto tokens_and_weights = tokenize(prompt, prompt_attn_range, 0, false);
+        auto tokens_and_weights = tokenize(prompt, prompt_attn_range, max_length, pad);
         auto& tokens            = std::get<0>(tokens_and_weights);
         auto& weights           = std::get<1>(tokens_and_weights);