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stream.wasm : add language selection support (#3354)

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* stream.wasm : add language selection support

This commit adds support for selecting the language in the stream.wasm
example. This is includes adding the model `base` which supports
multilingual transcription, and allowing the user to select a language
from a dropdown menu in the HTML interface.

The motivation for this is that it allows users to transcribe audio in
various languages.

Refs: https://github.com/ggml-org/whisper.cpp/issues/3347

* squash! stream.wasm : add language selection support

Remove strdup() for language in stream.wasm and update butten text for
base (should not be "base.en" but just "base").
This commit is contained in:
Daniel Bevenius
2025-08-02 07:03:04 +02:00
committed by GitHub
parent f7502dca87
commit 0becabc8d6
2 changed files with 83 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
examples/stream.wasm/emscripten.cpp
View File

@ -31,10 +31,11 @@ void stream_set_status(const std::string & status) {
g_status = status;
}
void stream_main(size_t index) {
void stream_main(size_t index, const std::string & lang) {
stream_set_status("loading data ...");
struct whisper_full_params wparams = whisper_full_default_params(whisper_sampling_strategy::WHISPER_SAMPLING_GREEDY);
bool is_multilingual = whisper_is_multilingual(g_contexts[index]);
wparams.n_threads = std::min(N_THREAD, (int) std::thread::hardware_concurrency());
wparams.offset_ms = 0;
@ -52,7 +53,7 @@ void stream_main(size_t index) {
// disable temperature fallback
wparams.temperature_inc = -1.0f;
wparams.language = "en";
wparams.language = is_multilingual ? lang.c_str() : "en";
printf("stream: using %d threads\n", wparams.n_threads);
@ -127,9 +128,8 @@ void stream_main(size_t index) {
g_contexts[index] = nullptr;
}
}
EMSCRIPTEN_BINDINGS(stream) {
emscripten::function("init", emscripten::optional_override([](const std::string & path_model) {
emscripten::function("init", emscripten::optional_override([](const std::string & path_model, const std::string & lang) {
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());
@ -138,8 +138,8 @@ EMSCRIPTEN_BINDINGS(stream) {
if (g_worker.joinable()) {
g_worker.join();
}
g_worker = std::thread([i]() {
stream_main(i);
g_worker = std::thread([i, lang]() {
stream_main(i, lang);
});
return i + 1;

78
examples/stream.wasm/index-tmpl.html
View File

@ -55,6 +55,7 @@
Whisper model: <span id="model-whisper-status"></span>
<button id="fetch-whisper-tiny-en" onclick="loadWhisper('tiny.en')">tiny.en (75 MB)</button>
<button id="fetch-whisper-base-en" onclick="loadWhisper('base.en')">base.en (142 MB)</button>
<button id="fetch-whisper-base" onclick="loadWhisper('base')">base (142 MB)</button>
<br><br>
Quantized models:<br><br>
<button id="fetch-whisper-tiny-en-q5_1" onclick="loadWhisper('tiny-en-q5_1')">tiny.en (Q5_1, 31 MB)</button>
@ -66,6 +67,77 @@
-->
</div>
<table>
<tr>
<td>
Language:
<select id="language" name="language">
<option value="en">English</option>
<option value="ar">Arabic</option>
<option value="hy">Armenian</option>
<option value="az">Azerbaijani</option>
<option value="eu">Basque</option>
<option value="be">Belarusian</option>
<option value="bn">Bengali</option>
<option value="bg">Bulgarian</option>
<option value="ca">Catalan</option>
<option value="zh">Chinese</option>
<option value="hr">Croatian</option>
<option value="cs">Czech</option>
<option value="da">Danish</option>
<option value="nl">Dutch</option>
<option value="en">English</option>
<option value="et">Estonian</option>
<option value="tl">Filipino</option>
<option value="fi">Finnish</option>
<option value="fr">French</option>
<option value="gl">Galician</option>
<option value="ka">Georgian</option>
<option value="de">German</option>
<option value="el">Greek</option>
<option value="gu">Gujarati</option>
<option value="iw">Hebrew</option>
<option value="hi">Hindi</option>
<option value="hu">Hungarian</option>
<option value="is">Icelandic</option>
<option value="id">Indonesian</option>
<option value="ga">Irish</option>
<option value="it">Italian</option>
<option value="ja">Japanese</option>
<option value="kn">Kannada</option>
<option value="ko">Korean</option>
<option value="la">Latin</option>
<option value="lv">Latvian</option>
<option value="lt">Lithuanian</option>
<option value="mk">Macedonian</option>
<option value="ms">Malay</option>
<option value="mt">Maltese</option>
<option value="no">Norwegian</option>
<option value="fa">Persian</option>
<option value="pl">Polish</option>
<option value="pt">Portuguese</option>
<option value="ro">Romanian</option>
<option value="ru">Russian</option>
<option value="sr">Serbian</option>
<option value="sk">Slovak</option>
<option value="sl">Slovenian</option>
<option value="es">Spanish</option>
<option value="sw">Swahili</option>
<option value="sv">Swedish</option>
<option value="ta">Tamil</option>
<option value="te">Telugu</option>
<option value="th">Thai</option>
<option value="tr">Turkish</option>
<option value="uk">Ukrainian</option>
<option value="ur">Urdu</option>
<option value="vi">Vietnamese</option>
<option value="cy">Welsh</option>
<option value="yi">Yiddish</option>
</select>
</td>
</tr>
</table>
<br>
<div id="input">
@ -176,6 +248,7 @@
let urls = {
'tiny.en': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en.bin',
'base.en': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en.bin',
'base' : 'https://whisper.ggerganov.com/ggml-model-whisper-base.bin',
'tiny-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en-q5_1.bin',
'base-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en-q5_1.bin',
@ -184,6 +257,7 @@
let sizes = {
'tiny.en': 75,
'base.en': 142,
'base': 142,
'tiny-en-q5_1': 31,
'base-en-q5_1': 57,
@ -197,6 +271,7 @@
document.getElementById('fetch-whisper-tiny-en').style.display = 'none';
document.getElementById('fetch-whisper-base-en').style.display = 'none';
document.getElementById('fetch-whisper-base').style.display = 'none';
document.getElementById('fetch-whisper-tiny-en-q5_1').style.display = 'none';
document.getElementById('fetch-whisper-base-en-q5_1').style.display = 'none';
@ -212,6 +287,7 @@
var el;
el = document.getElementById('fetch-whisper-tiny-en'); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-base-en'); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-base'); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-tiny-en-q5_1'); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-base-en-q5_1'); if (el) el.style.display = 'inline-block';
@ -368,7 +444,7 @@
function onStart() {
if (!instance) {
instance = Module.init('whisper.bin');
instance = Module.init('whisper.bin', document.getElementById('language').value);
if (instance) {
printTextarea("js: whisper initialized, instance: " + instance);