From b333b06772c89d96aacb5490d6a219fba7c09cc6 Mon Sep 17 00:00:00 2001
From: Mitja Felicijan <mitja.felicijan@gmail.com>
Date: Thu, 12 Feb 2026 20:57:17 +0100
Subject: Engage!

---
 llama.cpp/tools/mtmd/mtmd-cli.cpp | 437 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 437 insertions(+)
 create mode 100644 llama.cpp/tools/mtmd/mtmd-cli.cpp

(limited to 'llama.cpp/tools/mtmd/mtmd-cli.cpp')

diff --git a/llama.cpp/tools/mtmd/mtmd-cli.cpp b/llama.cpp/tools/mtmd/mtmd-cli.cpp
new file mode 100644
index 0000000..054c7fa
--- /dev/null
+++ b/llama.cpp/tools/mtmd/mtmd-cli.cpp
@@ -0,0 +1,437 @@
+#include "arg.h"
+#include "debug.h"
+#include "log.h"
+#include "common.h"
+#include "sampling.h"
+#include "llama.h"
+#include "ggml.h"
+#include "console.h"
+#include "chat.h"
+#include "mtmd.h"
+#include "mtmd-helper.h"
+
+#include <vector>
+#include <limits.h>
+#include <cinttypes>
+
+#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))
+#include <signal.h>
+#include <unistd.h>
+#elif defined (_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <windows.h>
+#include <signal.h>
+#endif
+
+// volatile, because of signal being an interrupt
+static volatile bool g_is_generating = false;
+static volatile bool g_is_interrupted = false;
+
+/**
+ * Please note that this is NOT a production-ready stuff.
+ * It is a playground for trying multimodal support in llama.cpp.
+ * For contributors: please keep this code simple and easy to understand.
+ */
+
+static void show_additional_info(int /*argc*/, char ** argv) {
+    LOG(
+        "Experimental CLI for multimodal\n\n"
+        "Usage: %s [options] -m <model> --mmproj <mmproj> --image <image> --audio <audio> -p <prompt>\n\n"
+        "  -m and --mmproj are required\n"
+        "  -hf user/repo can replace both -m and --mmproj in most cases\n"
+        "  --image, --audio and -p are optional, if NOT provided, the CLI will run in chat mode\n"
+        "  to disable using GPU for mmproj model, add --no-mmproj-offload\n",
+        argv[0]
+    );
+}
+
+#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__)) || defined (_WIN32)
+static void sigint_handler(int signo) {
+    if (signo == SIGINT) {
+        if (g_is_generating) {
+            g_is_generating = false;
+        } else {
+            console::cleanup();
+            if (g_is_interrupted) {
+                _exit(1);
+            }
+            g_is_interrupted = true;
+        }
+    }
+}
+#endif
+
+struct mtmd_cli_context {
+    mtmd::context_ptr ctx_vision;
+    common_init_result_ptr llama_init;
+
+    llama_model       * model;
+    llama_context     * lctx;
+    const llama_vocab * vocab;
+    common_sampler    * smpl;
+    llama_batch         batch;
+    int                 n_batch;
+
+    mtmd::bitmaps bitmaps;
+
+    // chat template
+    common_chat_templates_ptr tmpls;
+    std::vector<common_chat_msg> chat_history;
+    bool use_jinja = false;
+    // TODO: support for --system-prompt with /clear command
+
+    // support for legacy templates (models not having EOT token)
+    llama_tokens antiprompt_tokens;
+
+    int n_threads    = 1;
+    llama_pos n_past = 0;
+
+    base_callback_data cb_data;
+
+    mtmd_cli_context(common_params & params) : llama_init(common_init_from_params(params)) {
+        model = llama_init->model();
+        lctx = llama_init->context();
+        vocab = llama_model_get_vocab(model);
+        smpl = common_sampler_init(model, params.sampling);
+        n_threads = params.cpuparams.n_threads;
+        batch = llama_batch_init(1, 0, 1); // batch for next token generation
+        n_batch = params.n_batch;
+
+        if (!model || !lctx) {
+            exit(1);
+        }
+
+        if (!llama_model_chat_template(model, nullptr) && params.chat_template.empty()) {
+            LOG_ERR("Model does not have chat template.\n");
+            LOG_ERR("  For old llava models, you may need to use '--chat-template vicuna'\n");
+            LOG_ERR("  For MobileVLM models, use '--chat-template deepseek'\n");
+            LOG_ERR("  For Mistral Small 3.1, use '--chat-template mistral-v7'\n");
+            exit(1);
+        }
+
+        tmpls = common_chat_templates_init(model, params.chat_template);
+        use_jinja = params.use_jinja;
+        chat_history.clear();
+        LOG_INF("%s: chat template example:\n%s\n", __func__, common_chat_format_example(tmpls.get(), params.use_jinja, params.default_template_kwargs).c_str());
+
+        init_vision_context(params);
+
+        // load antiprompt tokens for legacy templates
+        if (params.chat_template == "vicuna") {
+            antiprompt_tokens = common_tokenize(lctx, "ASSISTANT:", false, true);
+        } else if (params.chat_template == "deepseek") {
+            antiprompt_tokens = common_tokenize(lctx, "###", false, true);
+        }
+    }
+
+    ~mtmd_cli_context() {
+        llama_batch_free(batch);
+        common_sampler_free(smpl);
+    }
+
+    void init_vision_context(common_params & params) {
+        const char * clip_path = params.mmproj.path.c_str();
+        mtmd_context_params mparams = mtmd_context_params_default();
+        mparams.use_gpu          = params.mmproj_use_gpu;
+        mparams.print_timings    = true;
+        mparams.n_threads        = params.cpuparams.n_threads;
+        mparams.flash_attn_type  = params.flash_attn_type;
+        mparams.warmup           = params.warmup;
+        mparams.image_min_tokens = params.image_min_tokens;
+        mparams.image_max_tokens = params.image_max_tokens;
+        if (std::getenv("MTMD_DEBUG_GRAPH") != nullptr) {
+            mparams.cb_eval_user_data = &cb_data;
+            mparams.cb_eval = common_debug_cb_eval<false>;
+        }
+        ctx_vision.reset(mtmd_init_from_file(clip_path, model, mparams));
+        if (!ctx_vision.get()) {
+            LOG_ERR("Failed to load vision model from %s\n", clip_path);
+            exit(1);
+        }
+    }
+
+    bool check_antiprompt(const llama_tokens & generated_tokens) {
+        if (antiprompt_tokens.empty() || generated_tokens.size() < antiprompt_tokens.size()) {
+            return false;
+        }
+        return std::equal(
+            generated_tokens.end() - antiprompt_tokens.size(),
+            generated_tokens.end(),
+            antiprompt_tokens.begin()
+        );
+    }
+
+    bool load_media(const std::string & fname) {
+        mtmd::bitmap bmp(mtmd_helper_bitmap_init_from_file(ctx_vision.get(), fname.c_str()));
+        if (!bmp.ptr) {
+            return false;
+        }
+        bitmaps.entries.push_back(std::move(bmp));
+        return true;
+    }
+};
+
+static int generate_response(mtmd_cli_context & ctx, int n_predict) {
+    llama_tokens generated_tokens;
+    for (int i = 0; i < n_predict; i++) {
+        if (i > n_predict || !g_is_generating || g_is_interrupted) {
+            LOG("\n");
+            break;
+        }
+
+        llama_token token_id = common_sampler_sample(ctx.smpl, ctx.lctx, -1);
+        generated_tokens.push_back(token_id);
+        common_sampler_accept(ctx.smpl, token_id, true);
+
+        if (llama_vocab_is_eog(ctx.vocab, token_id) || ctx.check_antiprompt(generated_tokens)) {
+            LOG("\n");
+            break; // end of generation
+        }
+
+        LOG("%s", common_token_to_piece(ctx.lctx, token_id).c_str());
+        fflush(stdout);
+
+        if (g_is_interrupted) {
+            LOG("\n");
+            break;
+        }
+
+        // eval the token
+        common_batch_clear(ctx.batch);
+        common_batch_add(ctx.batch, token_id, ctx.n_past++, {0}, true);
+        if (llama_decode(ctx.lctx, ctx.batch)) {
+            LOG_ERR("failed to decode token\n");
+            return 1;
+        }
+    }
+
+    std::string generated_text = common_detokenize(ctx.lctx, generated_tokens);
+    common_chat_msg msg;
+    msg.role    = "assistant";
+    msg.content = generated_text;
+    ctx.chat_history.push_back(std::move(msg));
+
+    return 0;
+}
+
+static std::string chat_add_and_format(mtmd_cli_context & ctx, common_chat_msg & new_msg) {
+    LOG_DBG("chat_add_and_format: new_msg.role='%s', new_msg.content='%s'\n",
+        new_msg.role.c_str(), new_msg.content.c_str());
+    auto formatted = common_chat_format_single(ctx.tmpls.get(), ctx.chat_history,
+        new_msg, new_msg.role == "user",
+        ctx.use_jinja);
+    ctx.chat_history.push_back(new_msg);
+    return formatted;
+}
+
+static int eval_message(mtmd_cli_context & ctx, common_chat_msg & msg) {
+    bool add_bos = ctx.chat_history.empty();
+    auto formatted_chat = chat_add_and_format(ctx, msg);
+    LOG_DBG("formatted_chat.prompt: %s\n", formatted_chat.c_str());
+
+    mtmd_input_text text;
+    text.text          = formatted_chat.c_str();
+    text.add_special   = add_bos;
+    text.parse_special = true;
+
+    if (g_is_interrupted) return 0;
+
+    mtmd::input_chunks chunks(mtmd_input_chunks_init());
+    auto bitmaps_c_ptr = ctx.bitmaps.c_ptr();
+    int32_t res = mtmd_tokenize(ctx.ctx_vision.get(),
+                        chunks.ptr.get(), // output
+                        &text, // text
+                        bitmaps_c_ptr.data(),
+                        bitmaps_c_ptr.size());
+    if (res != 0) {
+        LOG_ERR("Unable to tokenize prompt, res = %d\n", res);
+        return 1;
+    }
+
+    ctx.bitmaps.entries.clear();
+
+    llama_pos new_n_past;
+    if (mtmd_helper_eval_chunks(ctx.ctx_vision.get(),
+                ctx.lctx, // lctx
+                chunks.ptr.get(), // chunks
+                ctx.n_past, // n_past
+                0, // seq_id
+                ctx.n_batch, // n_batch
+                true, // logits_last
+                &new_n_past)) {
+        LOG_ERR("Unable to eval prompt\n");
+        return 1;
+    }
+
+    ctx.n_past = new_n_past;
+
+    LOG("\n");
+
+    return 0;
+}
+
+int main(int argc, char ** argv) {
+    ggml_time_init();
+
+    common_params params;
+
+    if (!common_params_parse(argc, argv, params, LLAMA_EXAMPLE_MTMD, show_additional_info)) {
+        return 1;
+    }
+
+    common_init();
+    mtmd_helper_log_set(common_log_default_callback, nullptr);
+
+    if (params.mmproj.path.empty()) {
+        show_additional_info(argc, argv);
+        LOG_ERR("ERR: Missing --mmproj argument\n");
+        return 1;
+    }
+
+    mtmd_cli_context ctx(params);
+    LOG_INF("%s: loading model: %s\n", __func__, params.model.path.c_str());
+
+    bool is_single_turn = !params.prompt.empty() && !params.image.empty();
+
+    int n_predict = params.n_predict < 0 ? INT_MAX : params.n_predict;
+
+    // Ctrl+C handling
+    {
+#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))
+        struct sigaction sigint_action;
+        sigint_action.sa_handler = sigint_handler;
+        sigemptyset (&sigint_action.sa_mask);
+        sigint_action.sa_flags = 0;
+        sigaction(SIGINT, &sigint_action, NULL);
+#elif defined (_WIN32)
+        auto console_ctrl_handler = +[](DWORD ctrl_type) -> BOOL {
+            return (ctrl_type == CTRL_C_EVENT) ? (sigint_handler(SIGINT), true) : false;
+        };
+        SetConsoleCtrlHandler(reinterpret_cast<PHANDLER_ROUTINE>(console_ctrl_handler), true);
+#endif
+    }
+
+    if (g_is_interrupted) return 130;
+
+    auto eval_system_prompt_if_present = [&] {
+        if (params.system_prompt.empty()) {
+            return 0;
+        }
+
+        common_chat_msg msg;
+        msg.role = "system";
+        msg.content = params.system_prompt;
+        return eval_message(ctx, msg);
+    };
+
+    LOG_WRN("WARN: This is an experimental CLI for testing multimodal capability.\n");
+    LOG_WRN("      For normal use cases, please use the standard llama-cli\n");
+
+    if (eval_system_prompt_if_present()) {
+        return 1;
+    }
+
+    if (is_single_turn) {
+        g_is_generating = true;
+        if (params.prompt.find(mtmd_default_marker()) == std::string::npos) {
+            for (size_t i = 0; i < params.image.size(); i++) {
+                // most models require the marker before each image
+                // ref: https://github.com/ggml-org/llama.cpp/pull/17616
+                params.prompt = mtmd_default_marker() + params.prompt;
+            }
+        }
+
+        common_chat_msg msg;
+        msg.role = "user";
+        msg.content = params.prompt;
+        for (const auto & image : params.image) {
+            if (!ctx.load_media(image)) {
+                return 1; // error is already printed by libmtmd
+            }
+        }
+        if (eval_message(ctx, msg)) {
+            return 1;
+        }
+        if (!g_is_interrupted && generate_response(ctx, n_predict)) {
+            return 1;
+        }
+
+    } else {
+        LOG("\n Running in chat mode, available commands:");
+        if (mtmd_support_vision(ctx.ctx_vision.get())) {
+            LOG("\n   /image <path>    load an image");
+        }
+        if (mtmd_support_audio(ctx.ctx_vision.get())) {
+            LOG("\n   /audio <path>    load an audio");
+        }
+        LOG("\n   /clear           clear the chat history");
+        LOG("\n   /quit or /exit   exit the program");
+        LOG("\n");
+
+        std::string content;
+
+        while (!g_is_interrupted) {
+            g_is_generating = false;
+            LOG("\n> ");
+            console::set_display(DISPLAY_TYPE_USER_INPUT);
+            std::string line;
+            console::readline(line, false);
+            if (g_is_interrupted) break;
+            console::set_display(DISPLAY_TYPE_RESET);
+            line = string_strip(line);
+            if (line.empty()) {
+                continue;
+            }
+            if (line == "/quit" || line == "/exit") {
+                break;
+            }
+            if (line == "/clear") {
+                ctx.n_past = 0;
+                ctx.chat_history.clear();
+                llama_memory_clear(llama_get_memory(ctx.lctx), true);
+                if (eval_system_prompt_if_present()) {
+                    return 1;
+                }
+                LOG("Chat history cleared\n\n");
+                continue;
+            }
+            g_is_generating = true;
+            bool is_image = line == "/image" || line.find("/image ") == 0;
+            bool is_audio = line == "/audio" || line.find("/audio ") == 0;
+            if (is_image || is_audio) {
+                if (line.size() < 8) {
+                    LOG_ERR("ERR: Missing media filename\n");
+                    continue;
+                }
+                std::string media_path = line.substr(7);
+                if (ctx.load_media(media_path)) {
+                    LOG("%s %s loaded\n", media_path.c_str(), is_image ? "image" : "audio");
+                    content += mtmd_default_marker();
+                }
+                // else, error is already printed by libmtmd
+                continue;
+            } else {
+                content += line;
+            }
+            common_chat_msg msg;
+            msg.role = "user";
+            msg.content = content;
+            int ret = eval_message(ctx, msg);
+            if (ret) {
+                return 1;
+            }
+            if (g_is_interrupted) break;
+            if (generate_response(ctx, n_predict)) {
+                return 1;
+            }
+            content.clear();
+        }
+    }
+    if (g_is_interrupted) LOG("\nInterrupted by user\n");
+    LOG("\n\n");
+    llama_perf_context_print(ctx.lctx);
+    return g_is_interrupted ? 130 : 0;
+}
-- 
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