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emscripten.cpp
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emscripten.cpp
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#include <emscripten.h>
#include <emscripten/bind.h>
#include <thread>
#include <vector>
#include "bark.h"
#include "ggml.h"
std::thread g_worker;
std::vector<struct bark_context *> g_contexts(4, nullptr);
EMSCRIPTEN_BINDINGS(bark) {
emscripten::function("init", emscripten::optional_override([](const std::string &path_model) {
if (g_worker.joinable()) {
g_worker.join();
}
for (size_t i = 0; i < g_contexts.size(); i++) {
if (g_contexts[i] == nullptr) {
g_contexts[i] = bark_load_model(path_model.c_str(), bark_verbosity_level::LOW, 0);
if (g_contexts[i] != nullptr) {
return i + 1;
} else {
return (size_t)0;
}
}
}
return (size_t)0;
}));
emscripten::function("free", emscripten::optional_override([](size_t index) {
if (g_worker.joinable()) {
g_worker.join();
}
--index;
if (index < g_contexts.size()) {
bark_free(g_contexts[index]);
g_contexts[index] = nullptr;
}
}));
emscripten::function("generate", emscripten::optional_override([](size_t index, const std::string &prompt, int n_threads) {
if (g_worker.joinable()) {
g_worker.join();
}
--index;
if (index >= g_contexts.size()) {
return -1;
}
if (g_contexts[index] == nullptr) {
return -2;
}
// print system information
{
printf("system_info: n_threads = %d / %d \n",
n_threads, std::thread::hardware_concurrency());
printf("\n");
}
// run the worker and generate audio
{
g_worker = std::thread([index, prompt, n_threads]() {
ggml_time_init();
const int64_t t_main_start_us = ggml_time_us();
if (!bark_generate_audio(g_contexts[index], prompt, n_threads)) {
printf("An error occured.");
}
const int64_t t_main_end_us = ggml_time_us();
printf("\n\n");
printf("%s: load time = %8.2f ms\n", __func__, g_contexts[index]->t_load_us / 1000.0f);
printf("%s: eval time = %8.2f ms\n", __func__, g_contexts[index]->t_eval_us / 1000.0f);
printf("%s: total time = %8.2f ms\n", __func__, (t_main_end_us - t_main_start_us) / 1000.0f);
});
}
return 0;
}));
emscripten::function("getAudioBuffer", emscripten::optional_override([](size_t index) -> emscripten::val {
if (index >= g_contexts.size() || g_contexts[index] == nullptr) {
return emscripten::val::null();
}
emscripten::val result = emscripten::val::object();
result.set("ptr", reinterpret_cast<uintptr_t>(g_contexts[index]->audio_arr.data()));
result.set("size", g_contexts[index]->audio_arr.size() * sizeof(float));
return result;
}));
}