webassembly002 whisper.wasm wasm_eval 与js代码交互 js部分
html的js
<script type="text/javascript" src="helpers.js">script>
<script type='text/javascript'>
#
# libmain
#
set(TARGET libmain)
add_executable(${TARGET} emscripten.cpp)# 添加可执行目标 libmain，并包含 emscripten.cpp 文件
include(DefaultTargetOptions) # 引入默认的目标选项，https://blog.csdn.net/ResumeProject/article/details/135571952
target_link_libraries(${TARGET} PRIVATE whisper) # 链接whisper库到 libmain 目标
unset(EXTRA_FLAGS)# 清除 EXTRA_FLAGS 变量
# 如果启用了 WHISPER_WASM_SINGLE_FILE 选项，设置 EXTRA_FLAGS，并进行一些额外的操作
if (WHISPER_WASM_SINGLE_FILE)
set(EXTRA_FLAGS "-s SINGLE_FILE=1")
message(STATUS "Embedding WASM inside main.js")
# 在构建后，将 libmain.js 复制到 whisper.wasm 目录下的 main.js
add_custom_command(
TARGET ${TARGET} POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
${CMAKE_BINARY_DIR}/bin/libmain.js
${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/whisper.wasm/main.js
)
endif()
# 设置目标属性，包括链接标志、编译标志等
set_target_properties(${TARGET} PROPERTIES LINK_FLAGS " \
--bind \
-s USE_PTHREADS=1 \
-s PTHREAD_POOL_SIZE_STRICT=0 \
-s INITIAL_MEMORY=2000MB \
-s TOTAL_MEMORY=2000MB \
-s FORCE_FILESYSTEM=1 \
-s EXPORTED_RUNTIME_METHODS=\"['print', 'printErr', 'ccall', 'cwrap']\" \
${EXTRA_FLAGS} \
")
# whisper.wasm 目标
set(TARGET whisper.wasm)
# 配置 index-tmpl.html 和 helpers.js，将其拷贝到指定目录
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/index-tmpl.html ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${TARGET}/index.html @ONLY)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/../helpers.js ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${TARGET}/helpers.js @ONLY)
convert audio buffer to WAV # TODO
// TODO: convert audio buffer to WAV
function setAudio(audio) {
//if (audio) {
// // convert to 16-bit PCM
// var blob = new Blob([audio], { type: 'audio/wav' });
// var url = URL.createObjectURL(blob);
// document.getElementById('source').src = url;
// document.getElementById('audio').hidden = false;
// document.getElementById('audio').loop = false;
// document.getElementById('audio').load();
//} else {
// document.getElementById('audio').hidden = true;
//}
}
changeInput函数
- 这个函数的作用是根据传入的参数 input 的不同值，控制页面上特定元素的显示和隐藏状态，从而根据用户的选择切换不同的输入方式
function changeInput(input) {
if (input == 'file') {
document.getElementById('input_file').style.display = 'block';
document.getElementById('input_mic' ).style.display = 'none';
document.getElementById('progress' ).style.display = 'none';
} else {
document.getElementById('input_file').style.display = 'none';
document.getElementById('input_mic' ).style.display = 'block';
document.getElementById('progress' ).style.display = 'block';
}
}
Module
var Module = {
print: printTextarea,// 将 JavaScript 的 print 属性设置为 printTextarea 函数。这意味着当 C/C++ 代码中调用 Module.print 时，实际上是调用了 printTextarea 函数
printErr: printTextarea,
setStatus: function(text) {
printTextarea('js: ' + text);
},
monitorRunDependencies: function(left) {
}
};
// web audio context
var context = null;
// audio data
var audio = null;
// the whisper instance
var instance = null;
var model_whisper = '';
// helper function
function convertTypedArray(src, type) {
var buffer = new ArrayBuffer(src.byteLength);
var baseView = new src.constructor(buffer).set(src);
return new type(buffer);
}
load model 加载模型文件
//
// load model
//
let dbVersion = 1
let dbName = 'whisper.ggerganov.com';
let indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB
loadF函数使用FileReader()对象加载本地文件
function storeFS(fname, buf) {
// write to WASM file using FS_createDataFile
// if the file exists, delete it
try {
Module.FS_unlink(fname);
} catch (e) {
// ignore
}
Module.FS_createDataFile("/", fname, buf, true, true);
//model_whisper = fname;
document.getElementById('model-whisper-status').innerHTML = 'loaded "' + model_whisper + '"!';
printTextarea('storeFS: stored model: ' + fname + ' size: ' + buf.length);
document.getElementById('model').innerHTML = 'Model fetched: ' + model_whisper;
}
// <input type="file" id="whisper-file" name="file" onchange="loadFile(event, 'whisper.bin')">
function loadFile(event, fname) {
var file = event.target.files[0] || null;
if (file == null) {
return;
}
printTextarea("loadFile: loading model: " + file.name + ", size: " + file.size + " bytes");
printTextarea('loadFile: please wait ...');
var reader = new FileReader();// 创建一个新的 FileReader 对象
// 设置 FileReader 对象的 onload 回调函数，在文件读取完成时触发
reader.onload = function(event) {
// 从 FileReader 中获取读取到的文件内容，存储在 Uint8Array 中
var buf = new Uint8Array(reader.result);
// 调用 storeFS 函数，将文件名 fname 和读取到的二进制数据 buf 传递给该函数
storeFS(fname, buf);
}
reader.readAsArrayBuffer(file);// 调用 readAsArrayBuffer 方法，以 ArrayBuffer 格式异步读取指定的文件 file
// 所有按钮不可见
document.getElementById('fetch-whisper-tiny-en' ).style.display = 'none'; document.getElementById('fetch-whisper-base-en' ).style.display = 'none'; document.getElementById('fetch-whisper-small-en').style.display = 'none'; document.getElementById('fetch-whisper-tiny' ).style.display = 'none'; document.getElementById('fetch-whisper-base' ).style.display = 'none'; document.getElementById('fetch-whisper-small' ).style.display = 'none'; document.getElementById('fetch-whisper-tiny-en-q5_1' ).style.display = 'none'; document.getElementById('fetch-whisper-tiny-q5_1' ).style.display = 'none'; document.getElementById('fetch-whisper-base-en-q5_1' ).style.display = 'none'; document.getElementById('fetch-whisper-base-q5_1' ).style.display = 'none'; document.getElementById('fetch-whisper-small-en-q5_1' ).style.display = 'none'; document.getElementById('fetch-whisper-small-q5_1' ).style.display = 'none'; document.getElementById('fetch-whisper-medium-en-q5_0').style.display = 'none'; document.getElementById('fetch-whisper-medium-q5_0' ).style.display = 'none'; document.getElementById('fetch-whisper-large-q5_0' ).style.display = 'none';
document.getElementById('whisper-file' ).style.display = 'none';
// 设置一个显示标签
document.getElementById('model-whisper-status' ).innerHTML = 'loaded model: ' + file.name;
}
loadWhisper函数
- 会调用loadRemote（定义在helper.js）函数
loadRemote: storage quota: 77309408870 bytes
loadRemote: storage usage: 77707010 bytes
loadRemote: "https://whisper.ggerganov.com/ggml-model-whisper-tiny.en.bin" is already in the IndexedDB
js: loading audio: 1424079488-1-16.aac, size: 7373610 bytes
- 加载的模型会存储到IndexDB中
//<button id="fetch-whisper-tiny-en" onclick="loadWhisper('tiny.en')">tiny.en (75 MB)button>
function loadWhisper(model) {
let urls = {
'tiny.en': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en.bin', 'tiny': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.bin', 'base.en': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en.bin', 'base': 'https://whisper.ggerganov.com/ggml-model-whisper-base.bin', 'small.en': 'https://whisper.ggerganov.com/ggml-model-whisper-small.en.bin', 'small': 'https://whisper.ggerganov.com/ggml-model-whisper-small.bin',
'tiny-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny.en-q5_1.bin', 'tiny-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-tiny-q5_1.bin', 'base-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-base.en-q5_1.bin', 'base-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-base-q5_1.bin', 'small-en-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-small.en-q5_1.bin', 'small-q5_1': 'https://whisper.ggerganov.com/ggml-model-whisper-small-q5_1.bin', 'medium-en-q5_0':'https://whisper.ggerganov.com/ggml-model-whisper-medium.en-q5_0.bin', 'medium-q5_0': 'https://whisper.ggerganov.com/ggml-model-whisper-medium-q5_0.bin', 'large-q5_0': 'https://whisper.ggerganov.com/ggml-model-whisper-large-q5_0.bin',
};
let sizes = {
'tiny.en': 75, 'tiny': 75, 'base.en': 142, 'base': 142, 'small.en': 466, 'small': 466,
'tiny-en-q5_1': 31, 'tiny-q5_1': 31, 'base-en-q5_1': 57, 'base-q5_1': 57, 'small-en-q5_1': 182, 'small-q5_1': 182, 'medium-en-q5_0': 515, 'medium-q5_0': 515, 'large-q5_0': 1030,
};
let url = urls[model];
let dst = 'whisper.bin';
let size_mb = sizes[model];
model_whisper = model;
// 前端显示设置
document.getElementById('fetch-whisper-tiny-en' ).style.display = 'none';
document.getElementById('fetch-whisper-base-en' ).style.display = 'none';
document.getElementById('fetch-whisper-small-en').style.display = 'none';
document.getElementById('fetch-whisper-tiny' ).style.display = 'none';
document.getElementById('fetch-whisper-base' ).style.display = 'none';
document.getElementById('fetch-whisper-small' ).style.display = 'none';
document.getElementById('fetch-whisper-tiny-en-q5_1' ).style.display = 'none';
document.getElementById('fetch-whisper-tiny-q5_1' ).style.display = 'none';
document.getElementById('fetch-whisper-base-en-q5_1' ).style.display = 'none';
document.getElementById('fetch-whisper-base-q5_1' ).style.display = 'none';
document.getElementById('fetch-whisper-small-en-q5_1' ).style.display = 'none';
document.getElementById('fetch-whisper-small-q5_1' ).style.display = 'none';
document.getElementById('fetch-whisper-medium-en-q5_0').style.display = 'none';
document.getElementById('fetch-whisper-medium-q5_0' ).style.display = 'none';
document.getElementById('fetch-whisper-large-q5_0' ).style.display = 'none';
document.getElementById('whisper-file' ).style.display = 'none';
document.getElementById('model-whisper-status').innerHTML = 'loading model: ' + model;
cbProgress = function(p) {
let el = document.getElementById('fetch-whisper-progress');
el.innerHTML = Math.round(100*p) + '%';
};
cbCancel = function() {
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-small-en'); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-tiny' ); 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-small' ); 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-tiny-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';
el = document.getElementById('fetch-whisper-base-q5_1' ); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-small-en-q5_1' ); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-small-q5_1' ); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-medium-en-q5_0'); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-medium-q5_0' ); if (el) el.style.display = 'inline-block';
el = document.getElementById('fetch-whisper-large-q5_0' ); if (el) el.style.display = 'inline-block';
el = document.getElementById('whisper-file' ); if (el) el.style.display = 'inline-block';
el = document.getElementById('model-whisper-status'); if (el) el.innerHTML = '';
};
loadRemote(url, dst, size_mb, cbProgress, storeFS, cbCancel, printTextarea);
}
audio file 加载音频文件
- AudioContext
//
// audio file
//
// 定义常量，表示最大的音频时长为 30 分钟，最大录音时长为 2 分钟，采样率为 16000 Hz
const kMaxAudio_s = 30 * 60;
const kMaxRecording_s = 2 * 60;
const kSampleRate = 16000;
// 兼容性处理：获取浏览器支持的 AudioContext 和 OfflineAudioContext
window.AudioContext = window.AudioContext || window.webkitAudioContext;
window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext;
// <input type="file" id="file" name="file" onchange="loadAudio(event)">
// 当选择文件后触发的函数，用于加载音频文件
function loadAudio(event) {
// 如果上下文对象不存在，创建一个 AudioContext 对象
if (!context) {
context = new AudioContext({
sampleRate: kSampleRate,
channelCount: 1,
echoCancellation: false,
autoGainControl: true,
noiseSuppression: true,
});
}
// 获取选择的文件
var file = event.target.files[0] || null;
if (file == null) {
return;
}
// 输出加载音频文件的信息
printTextarea('js: loading audio: ' + file.name + ', size: ' + file.size + ' bytes');
printTextarea('js: please wait ...');
// 创建 FileReader 对象，用于读取文件内容
var reader = new FileReader();
reader.onload = function(event) {
// 读取到的文件内容存储在 Uint8Array 中
var buf = new Uint8Array(reader.result);
// 解码音频数据
context.decodeAudioData(buf.buffer, function(audioBuffer) {
// 创建 OfflineAudioContext 对象，用于渲染音频
var offlineContext = new OfflineAudioContext(audioBuffer.numberOfChannels, audioBuffer.length, audioBuffer.sampleRate);
var source = offlineContext.createBufferSource();
source.buffer = audioBuffer;
source.connect(offlineContext.destination);
source.start(0);
// 开始渲染音频，处理渲染后的数据
offlineContext.startRendering().then(function(renderedBuffer) {
// 获取渲染后的音频数据
audio = renderedBuffer.getChannelData(0);
// 输出加载音频成功的信息
printTextarea('js: audio loaded, size: ' + audio.length);
// 如果音频长度超过 30 分钟，截取前 30 分钟
if (audio.length > kMaxAudio_s * kSampleRate) {
audio = audio.slice(0, kMaxAudio_s * kSampleRate);
printTextarea('js: truncated audio to first ' + kMaxAudio_s + ' seconds');
}
// 设置音频数据
setAudio(audio);
});
}, function(e) {
// 解码错误时输出错误信息
printTextarea('js: error decoding audio: ' + e);
audio = null;
setAudio(audio);
});
}
// 以 ArrayBuffer 格式读取文件
reader.readAsArrayBuffer(file);
}
microphone
//
// microphone
//
var mediaRecorder = null;
var doRecording = false;
var startTime = 0;
function stopRecording() {
doRecording = false;
}
// record up to kMaxRecording_s seconds of audio from the microphone
// check if doRecording is false every 1000 ms and stop recording if so
// update progress information
function startRecording() {
if (!context) {
context = new AudioContext({
sampleRate: kSampleRate,
channelCount: 1,
echoCancellation: false,
autoGainControl: true,
noiseSuppression: true,
});
}
document.getElementById('start').disabled = true;
document.getElementById('stop').disabled = false;
document.getElementById('progress-bar').style.width = '0%';
document.getElementById('progress-text').innerHTML = '0%';
doRecording = true;
startTime = Date.now();
var chunks = [];
var stream = null;
navigator.mediaDevices.getUserMedia({audio: true, video: false})
.then(function(s) {
stream = s;
mediaRecorder = new MediaRecorder(stream);
mediaRecorder.ondataavailable = function(e) {
chunks.push(e.data);
};
mediaRecorder.onstop = function(e) {
var blob = new Blob(chunks, { 'type' : 'audio/ogg; codecs=opus' });
chunks = [];
document.getElementById('start').disabled = false;
document.getElementById('stop').disabled = true;
var reader = new FileReader();
reader.onload = function(event) {
var buf = new Uint8Array(reader.result);
context.decodeAudioData(buf.buffer, function(audioBuffer) {
var offlineContext = new OfflineAudioContext(audioBuffer.numberOfChannels, audioBuffer.length, audioBuffer.sampleRate);
var source = offlineContext.createBufferSource();
source.buffer = audioBuffer;
source.connect(offlineContext.destination);
source.start(0);
offlineContext.startRendering().then(function(renderedBuffer) {
audio = renderedBuffer.getChannelData(0);
printTextarea('js: audio recorded, size: ' + audio.length);
// truncate to first 30 seconds
if (audio.length > kMaxRecording_s*kSampleRate) {
audio = audio.slice(0, kMaxRecording_s*kSampleRate);
printTextarea('js: truncated audio to first ' + kMaxRecording_s + ' seconds');
}
setAudio(audio);
});
}, function(e) {
printTextarea('js: error decoding audio: ' + e);
audio = null;
setAudio(audio);
});
}
reader.readAsArrayBuffer(blob);
};
mediaRecorder.start();
})
.catch(function(err) {
printTextarea('js: error getting audio stream: ' + err);
});
var interval = setInterval(function() {
if (!doRecording) {
clearInterval(interval);
mediaRecorder.stop();
stream.getTracks().forEach(function(track) {
track.stop();
});
}
document.getElementById('progress-bar').style.width = (100*(Date.now() - startTime)/1000/kMaxRecording_s) + '%';
document.getElementById('progress-text').innerHTML = (100*(Date.now() - startTime)/1000/kMaxRecording_s).toFixed(0) + '%';
}, 1000);
printTextarea('js: recording ...');
setTimeout(function() {
if (doRecording) {
printTextarea('js: recording stopped after ' + kMaxRecording_s + ' seconds');
stopRecording();
}
}, kMaxRecording_s*1000);
}
transcribe
- 主要调用
Module.full_default(instance, audio, document.getElementById('language').value, nthreads, translate);函数。 - setTimeout在当前执行堆栈清空后100 毫秒执行，以确保当前正在执行的函数及其相关的代码已经执行完毕，使得代码在后台运行而不会阻塞主线程的执行。
//
// transcribe
//
var nthreads = 8;
function changeThreads(value) {
nthreads = value;
document.getElementById('threads-value').innerHTML = nthreads;
}
//
function onProcess(translate) {
if (!instance) {
instance = Module.init('whisper.bin');
if (instance) {
printTextarea("js: whisper initialized, instance: " + instance);
document.getElementById('model').innerHTML = 'Model loaded: ' + model_whisper;
}
}
if (!instance) {
printTextarea("js: failed to initialize whisper");
return;
}
if (!audio) {
printTextarea("js: no audio data");
return;
}
if (instance) {
printTextarea('');
printTextarea('js: processing - this might take a while ...');
printTextarea('');
setTimeout(function() {
var ret = Module.full_default(instance, audio, document.getElementById('language').value, nthreads, translate);
console.log('js: full_default returned: ' + ret);
if (ret) {
printTextarea("js: whisper returned: " + ret);
}
}, 100);
}
}
</script>
<script type="text/javascript" src="main.js"></script>
</body>
</html>
helpers.js
- helpers.js并非是生成的，在项目的https://github.com/ggerganov/whisper.cpp/blob/master/examples/helpers.js
// Common Javascript functions used by the examples
function convertTypedArray(src, type) {
var buffer = new ArrayBuffer(src.byteLength);
var baseView = new src.constructor(buffer).set(src);
return new type(buffer);
}
var printTextarea = (function() {
var element = document.getElementById('output');
if (element) element.value = ''; // clear browser cache
return function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
console.log(text);
if (element) {
element.value += text + "\n";
element.scrollTop = element.scrollHeight; // focus on bottom
}
};
})();
async function clearCache() {
if (confirm('Are you sure you want to clear the cache?\nAll the models will be downloaded again.')) {
indexedDB.deleteDatabase(dbName);
location.reload();
}
}
// fetch a remote file from remote URL using the Fetch API
async function fetchRemote(url, cbProgress, cbPrint) {
cbPrint('fetchRemote: downloading with fetch()...');
const response = await fetch(
url,
{
method: 'GET',
headers: {
'Content-Type': 'application/octet-stream',
},
}
);
if (!response.ok) {
cbPrint('fetchRemote: failed to fetch ' + url);
return;
}
const contentLength = response.headers.get('content-length');
const total = parseInt(contentLength, 10);
const reader = response.body.getReader();
var chunks = [];
var receivedLength = 0;
var progressLast = -1;
while (true) {
const { done, value } = await reader.read();
if (done) {
break;
}
chunks.push(value);
receivedLength += value.length;
if (contentLength) {
cbProgress(receivedLength/total);
var progressCur = Math.round((receivedLength / total) * 10);
if (progressCur != progressLast) {
cbPrint('fetchRemote: fetching ' + 10*progressCur + '% ...');
progressLast = progressCur;
}
}
}
var position = 0;
var chunksAll = new Uint8Array(receivedLength);
for (var chunk of chunks) {
chunksAll.set(chunk, position);
position += chunk.length;
}
return chunksAll;
}
// load remote data
// - check if the data is already in the IndexedDB
// - if not, fetch it from the remote URL and store it in the IndexedDB
function loadRemote(url, dst, size_mb, cbProgress, cbReady, cbCancel, cbPrint) {
if (!navigator.storage || !navigator.storage.estimate) {
cbPrint('loadRemote: navigator.storage.estimate() is not supported');
} else {
// query the storage quota and print it
navigator.storage.estimate().then(function (estimate) {
cbPrint('loadRemote: storage quota: ' + estimate.quota + ' bytes');
cbPrint('loadRemote: storage usage: ' + estimate.usage + ' bytes');
});
}
// check if the data is already in the IndexedDB
var rq = indexedDB.open(dbName, dbVersion);
rq.onupgradeneeded = function (event) {
var db = event.target.result;
if (db.version == 1) {
var os = db.createObjectStore('models', { autoIncrement: false });
cbPrint('loadRemote: created IndexedDB ' + db.name + ' version ' + db.version);
} else {
// clear the database
var os = event.currentTarget.transaction.objectStore('models');
os.clear();
cbPrint('loadRemote: cleared IndexedDB ' + db.name + ' version ' + db.version);
}
};
rq.onsuccess = function (event) {
var db = event.target.result;
var tx = db.transaction(['models'], 'readonly');
var os = tx.objectStore('models');
var rq = os.get(url);
rq.onsuccess = function (event) {
if (rq.result) {
cbPrint('loadRemote: "' + url + '" is already in the IndexedDB');
cbReady(dst, rq.result);
} else {
// data is not in the IndexedDB
cbPrint('loadRemote: "' + url + '" is not in the IndexedDB');
// alert and ask the user to confirm
if (!confirm(
'You are about to download ' + size_mb + ' MB of data.\n' +
'The model data will be cached in the browser for future use.\n\n' +
'Press OK to continue.')) {
cbCancel();
return;
}
fetchRemote(url, cbProgress, cbPrint).then(function (data) {
if (data) {
// store the data in the IndexedDB
var rq = indexedDB.open(dbName, dbVersion);
rq.onsuccess = function (event) {
var db = event.target.result;
var tx = db.transaction(['models'], 'readwrite');
var os = tx.objectStore('models');
var rq = null;
try {
var rq = os.put(data, url);
} catch (e) {
cbPrint('loadRemote: failed to store "' + url + '" in the IndexedDB: \n' + e);
cbCancel();
return;
}
rq.onsuccess = function (event) {
cbPrint('loadRemote: "' + url + '" stored in the IndexedDB');
cbReady(dst, data);
};
rq.onerror = function (event) {
cbPrint('loadRemote: failed to store "' + url + '" in the IndexedDB');
cbCancel();
};
};
}
});
}
};
rq.onerror = function (event) {
cbPrint('loadRemote: failed to get data from the IndexedDB');
cbCancel();
};
};
rq.onerror = function (event) {
cbPrint('loadRemote: failed to open IndexedDB');
cbCancel();
};
rq.onblocked = function (event) {
cbPrint('loadRemote: failed to open IndexedDB: blocked');
cbCancel();
};
rq.onabort = function (event) {
cbPrint('loadRemote: failed to open IndexedDB: abort');
cbCancel();
};
}
CG
- 在cmake中开启 ASSERTIONS
set(TARGET_NAME my_target)
add_executable(${TARGET_NAME} main.cpp)
# 添加 Emscripten 编译选项
set(EMSCRIPTEN_FLAGS "-sASSERTIONS=1")
# 设置目标属性
set_target_properties(${TARGET_NAME} PROPERTIES
SUFFIX ".html" # 输出文件的后缀为 .html
COMPILE_FLAGS "${EMSCRIPTEN_FLAGS}" # 添加 Emscripten 编译选项
)
-
在谷歌浏览器中，尝试扩大内存限制：
-
"C:Program Files (x86)GoogleChromeApplicationchrome.exe" --max_old_space_size=4096chrome.exe --max_old_space_size=4096 # 这里的 `4096` 是以兆字节为单位的内存大小。chrome.exe --js-flags="--max-old-space-size=4096"chrome.exe --disable-gpu # 在一些情况下，禁用 GPU 加速可能会释放一些系统内存 -
探讨 Node 中的内存堆分配，并将本地硬件推向极限