init

whisper.cpp-1.5.2/examples/talk.wasm/emscripten.cpp

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+#include "ggml.h"
+#include "gpt-2.h"
+#include "whisper.h"
+
+#include <emscripten.h>
+#include <emscripten/bind.h>
+
+#include <atomic>
+#include <cmath>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <vector>
+#include <regex>
+
+constexpr int N_THREAD = 8;
+
+struct gpt2_context * g_gpt2;
+std::vector<struct whisper_context *> g_contexts(4, nullptr);
+
+std::mutex g_mutex;
+std::thread g_worker;
+std::atomic<bool> g_running(false);
+
+bool g_force_speak = false;
+std::string g_text_to_speak = "";
+std::string g_status = "";
+std::string g_status_forced = "";
+
+std::vector<float> g_pcmf32;
+
+std::string to_timestamp(int64_t t) {
+    int64_t sec = t/100;
+    int64_t msec = t - sec*100;
+    int64_t min = sec/60;
+    sec = sec - min*60;
+
+    char buf[32];
+    snprintf(buf, sizeof(buf), "%02d:%02d.%03d", (int) min, (int) sec, (int) msec);
+
+    return std::string(buf);
+}
+
+void talk_set_status(const std::string & status) {
+    std::lock_guard<std::mutex> lock(g_mutex);
+    g_status = status;
+}
+
+void talk_main(size_t index) {
+    talk_set_status("loading data ...");
+
+    struct whisper_full_params wparams = whisper_full_default_params(whisper_sampling_strategy::WHISPER_SAMPLING_GREEDY);
+
+    wparams.n_threads        = std::min(N_THREAD, (int) std::thread::hardware_concurrency());
+    wparams.offset_ms        = 0;
+    wparams.translate        = false;
+    wparams.no_context       = true;
+    wparams.single_segment   = true;
+    wparams.print_realtime   = false;
+    wparams.print_progress   = false;
+    wparams.print_timestamps = true;
+    wparams.print_special    = false;
+
+    wparams.max_tokens       = 32;
+    wparams.audio_ctx        = 768; // partial encoder context for better performance
+
+    wparams.language         = "en";
+
+    g_gpt2 = gpt2_init("gpt-2.bin");
+
+    printf("talk: using %d threads\n", wparams.n_threads);
+
+    std::vector<float> pcmf32;
+
+    // whisper context
+    auto & ctx = g_contexts[index];
+
+    const int64_t step_samples   = 2*WHISPER_SAMPLE_RATE;
+    const int64_t window_samples = 9*WHISPER_SAMPLE_RATE;
+    const int64_t step_ms        = (step_samples*1000)/WHISPER_SAMPLE_RATE;
+
+    auto t_last = std::chrono::high_resolution_clock::now();
+
+    talk_set_status("listening ...");
+
+    while (g_running) {
+
+        const auto t_now = std::chrono::high_resolution_clock::now();
+        if (std::chrono::duration_cast<std::chrono::milliseconds>(t_now - t_last).count() < step_ms) {
+            {
+                std::lock_guard<std::mutex> lock(g_mutex);
+                g_pcmf32.clear();
+            }
+            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+            continue;
+        }
+
+        talk_set_status("listening ...");
+
+        {
+            std::unique_lock<std::mutex> lock(g_mutex);
+
+            if (g_pcmf32.size() < step_samples) {
+                lock.unlock();
+
+                std::this_thread::sleep_for(std::chrono::milliseconds(10));
+
+                continue;
+            }
+
+            pcmf32 = std::vector<float>(g_pcmf32.end() - std::min((int64_t) g_pcmf32.size(), window_samples), g_pcmf32.end());
+        }
+
+        // VAD: if energy in during last second is above threshold, then skip
+        {
+            float energy_all = 0.0f;
+            float energy_1s  = 0.0f;
+
+            for (size_t i = 0; i < pcmf32.size(); i++) {
+                energy_all += fabsf(pcmf32[i]);
+
+                if (i >= pcmf32.size() - WHISPER_SAMPLE_RATE) {
+                    energy_1s += fabsf(pcmf32[i]);
+                }
+            }
+
+            energy_all /= pcmf32.size();
+            energy_1s  /= WHISPER_SAMPLE_RATE;
+
+            if (energy_1s > 0.1f*energy_all && !g_force_speak) {
+                std::this_thread::sleep_for(std::chrono::milliseconds(10));
+                continue;
+            }
+        }
+
+        talk_set_status("processing audio (whisper)...");
+
+        t_last = t_now;
+
+        if (!g_force_speak) {
+            const auto t_start = std::chrono::high_resolution_clock::now();
+
+            int ret = whisper_full(ctx, wparams, pcmf32.data(), pcmf32.size());
+            if (ret != 0) {
+                printf("whisper_full() failed: %d\n", ret);
+                break;
+            }
+
+            const auto t_end = std::chrono::high_resolution_clock::now();
+
+            printf("whisper_full() returned %d in %f seconds\n", ret, std::chrono::duration<double>(t_end - t_start).count());
+        }
+
+        {
+            std::string text_heard;
+
+            if (!g_force_speak) {
+                const int n_segments = whisper_full_n_segments(ctx);
+                for (int i = n_segments - 1; i < n_segments; ++i) {
+                    const char * text = whisper_full_get_segment_text(ctx, i);
+
+                    const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
+                    const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
+
+                    printf ("[%s --> %s]  %s\n", to_timestamp(t0).c_str(), to_timestamp(t1).c_str(), text);
+
+                    text_heard += text;
+                }
+            }
+
+            g_force_speak = false;
+
+            // remove text between brackets using regex
+            {
+                std::regex re("\\[.*?\\]");
+                text_heard = std::regex_replace(text_heard, re, "");
+            }
+
+            // remove text between brackets using regex
+            {
+                std::regex re("\\(.*?\\)");
+                text_heard = std::regex_replace(text_heard, re, "");
+            }
+
+            // remove all characters, except for letters, numbers, punctuation and ':', '\'', '-', ' '
+            text_heard = std::regex_replace(text_heard, std::regex("[^a-zA-Z0-9\\.,\\?!\\s\\:\\'\\-]"), "");
+
+            // take first line
+            text_heard = text_heard.substr(0, text_heard.find_first_of("\n"));
+
+            // remove leading and trailing whitespace
+            text_heard = std::regex_replace(text_heard, std::regex("^\\s+"), "");
+            text_heard = std::regex_replace(text_heard, std::regex("\\s+$"), "");
+
+            talk_set_status("'" + text_heard + "' - thinking how to respond (gpt-2) ...");
+
+            const std::vector<gpt_vocab::id> tokens = gpt2_tokenize(g_gpt2, text_heard.c_str());
+
+            printf("whisper: number of tokens: %d, '%s'\n", (int) tokens.size(), text_heard.c_str());
+
+            std::string text_to_speak;
+            std::string prompt_base;
+
+            {
+                std::lock_guard<std::mutex> lock(g_mutex);
+                prompt_base = gpt2_get_prompt(g_gpt2);
+            }
+
+            if (tokens.size() > 0) {
+                text_to_speak = gpt2_gen_text(g_gpt2, (prompt_base + text_heard + "\n").c_str(), 32);
+                text_to_speak = std::regex_replace(text_to_speak, std::regex("[^a-zA-Z0-9\\.,\\?!\\s\\:\\'\\-]"), "");
+                text_to_speak = text_to_speak.substr(0, text_to_speak.find_first_of("\n"));
+
+                std::lock_guard<std::mutex> lock(g_mutex);
+
+                // remove first 2 lines of base prompt
+                {
+                    const size_t pos = prompt_base.find_first_of("\n");
+                    if (pos != std::string::npos) {
+                        prompt_base = prompt_base.substr(pos + 1);
+                    }
+                }
+                {
+                    const size_t pos = prompt_base.find_first_of("\n");
+                    if (pos != std::string::npos) {
+                        prompt_base = prompt_base.substr(pos + 1);
+                    }
+                }
+                prompt_base += text_heard + "\n" + text_to_speak + "\n";
+            } else {
+                text_to_speak = gpt2_gen_text(g_gpt2, prompt_base.c_str(), 32);
+                text_to_speak = std::regex_replace(text_to_speak, std::regex("[^a-zA-Z0-9\\.,\\?!\\s\\:\\'\\-]"), "");
+                text_to_speak = text_to_speak.substr(0, text_to_speak.find_first_of("\n"));
+
+                std::lock_guard<std::mutex> lock(g_mutex);
+
+                const size_t pos = prompt_base.find_first_of("\n");
+                if (pos != std::string::npos) {
+                    prompt_base = prompt_base.substr(pos + 1);
+                }
+                prompt_base += text_to_speak + "\n";
+            }
+
+            printf("gpt-2: %s\n", text_to_speak.c_str());
+
+            //printf("========================\n");
+            //printf("gpt-2: prompt_base:\n'%s'\n", prompt_base.c_str());
+            //printf("========================\n");
+
+            {
+                std::lock_guard<std::mutex> lock(g_mutex);
+                t_last = std::chrono::high_resolution_clock::now();
+                g_text_to_speak = text_to_speak;
+                g_pcmf32.clear();
+                gpt2_set_prompt(g_gpt2, prompt_base.c_str());
+            }
+
+            talk_set_status("speaking ...");
+        }
+    }
+
+    gpt2_free(g_gpt2);
+
+    if (index < g_contexts.size()) {
+        whisper_free(g_contexts[index]);
+        g_contexts[index] = nullptr;
+    }
+}
+
+EMSCRIPTEN_BINDINGS(talk) {
+    emscripten::function("init", emscripten::optional_override([](const std::string & path_model) {
+        for (size_t i = 0; i < g_contexts.size(); ++i) {
+            if (g_contexts[i] == nullptr) {
+                g_contexts[i] = whisper_init_from_file_with_params(path_model.c_str(), whisper_context_default_params());
+                if (g_contexts[i] != nullptr) {
+                    g_running = true;
+                    if (g_worker.joinable()) {
+                        g_worker.join();
+                    }
+                    g_worker = std::thread([i]() {
+                        talk_main(i);
+                    });
+
+                    return i + 1;
+                } else {
+                    return (size_t) 0;
+                }
+            }
+        }
+
+        return (size_t) 0;
+    }));
+
+    emscripten::function("free", emscripten::optional_override([](size_t index) {
+        if (g_running) {
+            g_running = false;
+        }
+    }));
+
+    emscripten::function("set_audio", emscripten::optional_override([](size_t index, const emscripten::val & audio) {
+        --index;
+
+        if (index >= g_contexts.size()) {
+            return -1;
+        }
+
+        if (g_contexts[index] == nullptr) {
+            return -2;
+        }
+
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            const int n = audio["length"].as<int>();
+
+            emscripten::val heap = emscripten::val::module_property("HEAPU8");
+            emscripten::val memory = heap["buffer"];
+
+            g_pcmf32.resize(n);
+
+            emscripten::val memoryView = audio["constructor"].new_(memory, reinterpret_cast<uintptr_t>(g_pcmf32.data()), n);
+            memoryView.call<void>("set", audio);
+        }
+
+        return 0;
+    }));
+
+    emscripten::function("force_speak", emscripten::optional_override([](size_t index) {
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            g_force_speak = true;
+        }
+    }));
+
+    emscripten::function("get_text_context", emscripten::optional_override([]() {
+        std::string text_context;
+
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            text_context = gpt2_get_prompt(g_gpt2);
+        }
+
+        return text_context;
+    }));
+
+    emscripten::function("get_text_to_speak", emscripten::optional_override([]() {
+        std::string text_to_speak;
+
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            text_to_speak = std::move(g_text_to_speak);
+        }
+
+        return text_to_speak;
+    }));
+
+    emscripten::function("get_status", emscripten::optional_override([]() {
+        std::string status;
+
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            status = g_status_forced.empty() ? g_status : g_status_forced;
+        }
+
+        return status;
+    }));
+
+    emscripten::function("set_status", emscripten::optional_override([](const std::string & status) {
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            g_status_forced = status;
+        }
+    }));
+
+    emscripten::function("set_prompt", emscripten::optional_override([](const std::string & prompt) {
+        {
+            std::lock_guard<std::mutex> lock(g_mutex);
+            gpt2_set_prompt(g_gpt2, prompt.c_str());
+        }
+    }));
+}