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94 lines
2.9 KiB
94 lines
2.9 KiB
//
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// This is the Javascript API of whisper.cpp
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//
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// Very crude at the moment.
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// Feel free to contribute and make this better!
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//
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// See the tests/test-whisper.js for sample usage
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//
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#include "whisper.h"
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#include <emscripten.h>
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#include <emscripten/bind.h>
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#include <thread>
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#include <vector>
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struct whisper_context * g_context;
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EMSCRIPTEN_BINDINGS(whisper) {
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emscripten::function("init", emscripten::optional_override([](const std::string & path_model) {
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if (g_context == nullptr) {
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g_context = whisper_init(path_model.c_str());
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if (g_context != nullptr) {
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return true;
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} else {
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return false;
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}
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}
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return false;
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}));
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emscripten::function("free", emscripten::optional_override([]() {
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if (g_context) {
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whisper_free(g_context);
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g_context = nullptr;
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}
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}));
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emscripten::function("full_default", emscripten::optional_override([](const emscripten::val & audio, const std::string & lang, bool translate) {
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if (g_context == nullptr) {
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return -1;
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}
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struct whisper_full_params params = whisper_full_default_params(whisper_sampling_strategy::WHISPER_SAMPLING_GREEDY);
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params.print_realtime = true;
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params.print_progress = false;
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params.print_timestamps = true;
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params.print_special = false;
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params.translate = translate;
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params.language = whisper_is_multilingual(g_context) ? lang.c_str() : "en";
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params.n_threads = std::min(8, (int) std::thread::hardware_concurrency());
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params.offset_ms = 0;
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std::vector<float> pcmf32;
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const int n = audio["length"].as<int>();
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emscripten::val heap = emscripten::val::module_property("HEAPU8");
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emscripten::val memory = heap["buffer"];
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pcmf32.resize(n);
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emscripten::val memoryView = audio["constructor"].new_(memory, reinterpret_cast<uintptr_t>(pcmf32.data()), n);
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memoryView.call<void>("set", audio);
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// print system information
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{
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printf("\n");
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printf("system_info: n_threads = %d / %d | %s\n",
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params.n_threads, std::thread::hardware_concurrency(), whisper_print_system_info());
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printf("\n");
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printf("%s: processing %d samples, %.1f sec, %d threads, %d processors, lang = %s, task = %s ...\n",
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__func__, int(pcmf32.size()), float(pcmf32.size())/WHISPER_SAMPLE_RATE,
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params.n_threads, 1,
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params.language,
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params.translate ? "translate" : "transcribe");
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printf("\n");
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}
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// run whisper
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{
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whisper_reset_timings(g_context);
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whisper_full(g_context, params, pcmf32.data(), pcmf32.size());
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whisper_print_timings(g_context);
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}
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return 0;
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}));
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}
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