Crackled Audio - Web Assembly Compilation ( WASM )

Hi ,
We have compiled opus into wasm and trying to decode an audio in browser through wasm and play it . Opus decoder produces distorted/bad audio .

Here are the steps to compile opus into wasm .

./autogen.sh

emconfigure ./configure --prefix=/home/local/ZOHOCORP/praveen-10261/opus-wasm/opus_libwasm/opus/opus/ --disable-rtcd --disable-intrinsics --disable-shared   --enable-static  --disable-stack-protector --disable-hardening

emmake make

emmake make install

Below is the C Wrapper to call opus API's:

#include <opus/opus.h>
#include <emscripten.h>
#include <stdlib.h>

void *decoder;

void *malloc_(int size){
      return malloc(size);
}

int opus_decoder_create_(int sample_rate , int channels){
    int err;

    decoder = opus_decoder_create(sample_rate,channels,&err);

    if(err != OPUS_OK){
       return -1; 
    }

    return 1;
}

int opus_decode_(void *encoded_data,int data_len , float *decoded_data,int max_size){

    return opus_decode_float(decoder,encoded_data,data_len,decoded_data,max_size,0);
}

Start with the provided Emscripten configure and make commands and the C wrapper around opus_decoder_create and opus_decode_float. Reproduce the browser decode and playback path, then compare the decoded output with a known-good native result to locate the source of the distortion. Done means identifying and correcting the WASM decoding issue, with audio playback no longer distorted.