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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
/**
* Converts an ArrayBuffer to a Blob URL.
*
* @param {ArrayBuffer} buffer - The ArrayBuffer to convert.
* @returns {string} The Blob URL.
*/
export function arrayBufferToBlobURL(buffer) {
let blob = new Blob([buffer], { type: "application/wasm" });
return URL.createObjectURL(blob);
}
/**
* Validate some simple Wasm that uses a SIMD operation.
*/
function detectSimdSupport() {
return WebAssembly.validate(
new Uint8Array(
// ```
// ;; Detect SIMD support.
// ;; Compile by running: wat2wasm --enable-all simd-detect.wat
//
// (module
// (func (result v128)
// i32.const 0
// i8x16.splat
// i8x16.popcnt
// )
// )
// ```
// prettier-ignore
[
0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x05, 0x01, 0x60, 0x00,
0x01, 0x7b, 0x03, 0x02, 0x01, 0x00, 0x0a, 0x0a, 0x01, 0x08, 0x00, 0x41, 0x00,
0xfd, 0x0f, 0xfd, 0x62, 0x0b
]
)
);
}
let cachedRuntimeWasmFilename = null;
/**
* Determines the appropriate WebAssembly (Wasm) filename based on the runtime capabilities of the browser.
* This function considers both SIMD and multi-threading support.
* It returns a filename that matches the browser's capabilities, ensuring the most optimized version of the Wasm file is used.
*
* The result is cached to avoid re-computation.
*
* @param {Window|null} browsingContext - The browsing context to use for feature detection.
* @returns {string} The filename of the Wasm file best suited for the current browser's capabilities.
*/
export function getRuntimeWasmFilename(browsingContext = null) {
if (cachedRuntimeWasmFilename != null) {
return cachedRuntimeWasmFilename;
}
// The cross-origin isolation flag is used to determine if we have multi-threading support.
const hasMultiThreadSupport = browsingContext
? browsingContext.crossOriginIsolated
: false;
let res;
if (detectSimdSupport()) {
res = hasMultiThreadSupport
? "ort-wasm-simd-threaded.wasm"
: "ort-wasm-simd.wasm";
} else {
res = hasMultiThreadSupport ? "ort-wasm-threaded.wasm" : "ort-wasm.wasm";
}
cachedRuntimeWasmFilename = res;
return res;
}
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