sherpa-ncnn: [Help wanted] sherpa-ncnn for android crash when using LSTM model

如何在安卓平台的sherpa-ncnn Demo中使用LSTM模型？

描述：

当我只是修改对应的ModelConfig时，修改部分代码如下方附录代码，sherpa-ncnn App闪退，看起来是在jni中Java_com_k2fsa_sherpa_ncnn_SherpaNcnn_new中调用sherpa_ncnn::Model::Create创建sherpa_ncnn::LstmModel::LstmModel时出现的问题。

推测：

是我在使用LSTM模型时必须要如下示图2中LOGE所述，添加SherpaMetaData 到encoder_xxx.ncnn.param中吗？我应该如何添加SherpaMetaData？

崩溃日志：

以下是我修改的SherpaNcnn.kt部分代码：

fun getModelConfig(type: Int, useGPU: Boolean): ModelConfig? {
    when (type) {
        //crash
        1 -> {
            val modelDir = "sherpa-ncnn-streaming-zipformer-bilingual-zh-en-2023-02-13"
            return ModelConfig(
                encoderParam = "$modelDir/encoder_jit_trace-pnnx.ncnn.param",
                encoderBin = "$modelDir/encoder_jit_trace-pnnx.ncnn.bin",
                decoderParam = "$modelDir/decoder_jit_trace-pnnx.ncnn.param",
                decoderBin = "$modelDir/decoder_jit_trace-pnnx.ncnn.bin",
                joinerParam = "$modelDir/joiner_jit_trace-pnnx.ncnn.param",
                joinerBin = "$modelDir/joiner_jit_trace-pnnx.ncnn.bin",
                tokens = "$modelDir/tokens.txt",
                numThreads = 4,
                useGPU = useGPU,
            )
        }
        2 -> {
            val modelDir = "sherpa-ncnn-conv-emformer-transducer-2022-12-08/v2"
            return ModelConfig(
                encoderParam = "$modelDir/encoder_jit_trace-pnnx-epoch-15-avg-3.ncnn.param",
                encoderBin = "$modelDir/encoder_jit_trace-pnnx-epoch-15-avg-3.ncnn.bin",
                decoderParam = "$modelDir/decoder_jit_trace-pnnx-epoch-15-avg-3.ncnn.param",
                decoderBin = "$modelDir/decoder_jit_trace-pnnx-epoch-15-avg-3.ncnn.bin",
                joinerParam = "$modelDir/joiner_jit_trace-pnnx-epoch-15-avg-3.ncnn.param",
                joinerBin = "$modelDir/joiner_jit_trace-pnnx-epoch-15-avg-3.ncnn.bin",
                tokens = "$modelDir/tokens.txt",
                numThreads = 4,
                useGPU = useGPU,
            )
        }
        //crash
        3 -> {
            val modelDir = "sherpa-ncnn-lstm-transducer-small-2023-02-13"
            return ModelConfig(
                encoderParam = "$modelDir/encoder_jit_trace-pnnx.ncnn.param",
                encoderBin = "$modelDir/encoder_jit_trace-pnnx.ncnn.bin",
                decoderParam = "$modelDir/decoder_jit_trace-pnnx.ncnn.param",
                decoderBin = "$modelDir/decoder_jit_trace-pnnx.ncnn.bin",
                joinerParam = "$modelDir/joiner_jit_trace-pnnx.ncnn.param",
                joinerBin = "$modelDir/joiner_jit_trace-pnnx.ncnn.bin",
                tokens = "$modelDir/tokens.txt",
                numThreads = 4,
                useGPU = useGPU,
            )
        }
    }
    return null
}