lyra_android_example.apk crashed.

[TangYuFan]

Hello, the Android example compiled according to the readme file runs well on some phones and crashes on some phones。

The compilation script I tried：
(1) bazel build -c opt lyra/android_example:lyra_android_example --config=android_arm64 --copt=-DBENCHMARK
(2) bazel build -c opt lyra/android_example:lyra_android_example --fat_apk_cpu=armeabi-v7a,arm64-v8a --copt=-DBENCHMARK

Running apk on some phones has crashed. The following is the error log:

May I ask how to solve the above problems? Is compiling a script requiring special instructions? Because I use encoding and decoding interfaces to package it into SO for Android phones, some phones may not run properly。

[JianhaoPeng]

@TangYuFan Hi, I also encountered this problem, have you solved this yet? I tried upgrade the version of sdk, but the compiling process failed, only version 30 can build successfully. Besides, is this apk can be adapted to android 15? Thank you so much.

[TangYuFan]

My colleague solved this problem, probably because there is an issue with the destructor:

[JianhaoPeng]

@TangYuFan Hi, thanks, I found this line in DenseStorge.h, should I comment out this line, can you tell me how do you solve this? By the way, I found that the app didn't crash after I commented out the encode and decode methods in jni_lyra_benchmark_lib.cpp. Can we use email to discuss it, i struggle with this problem for weeks, my email is [email protected], thanks a million.

[TangYuFan]

My colleague found through GDB debugging that it is hanging on this destructor. Sorry, I don't know the specific modifications. My algorithm colleague fixed the problem and directly provided me with the .so dynamic library file.

[JianhaoPeng]

We're trying to implement the encode and decode method separately using the .so dynamic library file, can you share it? Really appreciate your help.

[TangYuFan]

You can obtain the Android SO library file through the following methods:
The idea comes from another issue

1. Add codec dependency to android_example / BUILD
   deps = [
   "//lyra:lyra_encoder",
   "//lyra:lyra_decoder",
   ]
   2.Add the codec jni function to jni_lyra_benchmarked_lib.cc

#include "lyra/lyra_encoder.h"
#include "lyra/lyra_decoder.h"

namespace {
std::unique_ptrchromemedia::codec::LyraEncoder encoder;
std::unique_ptrchromemedia::codec::LyraDecoder decoder;
}

Next, you can call Lyra to provide JNI functions such as initialization, release, encoding, decoding, etc
like this：
extern "C" JNIEXPORT int JNICALL Java_com_lyra_LyraCodec_codecInit(JNIEnv* env, jobject this_obj, jint sampleRateHz, jint numChannels, jint bitrate, jboolean enableDtx, jstring modelPath){
const char* modelPathCStr = env->GetStringUTFChars(modelPath, nullptr);
if (modelPathCStr == nullptr) {
return 0;
}
ghc::filesystem::path model(modelPathCStr);
env->ReleaseStringUTFChars(modelPath, modelPathCStr);
encoder = chromemedia::codec::LyraEncoder::Create(sampleRateHz, numChannels, bitrate, enableDtx, model);
decoder = chromemedia::codec::LyraDecoder::Create(sampleRateHz, numChannels, model);
return (encoder != nullptr) && (decoder != nullptr);
}
3. Compile android_deample and extract so file