moonshine-c-api.c
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// c-api-examples/moonshine-c-api.c
//
// Copyright (c) 2024 Xiaomi Corporation
//
// This file demonstrates how to use Moonshine tiny with sherpa-onnx's C API.
// clang-format off
//
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-moonshine-tiny-en-int8.tar.bz2
// tar xvf sherpa-onnx-moonshine-tiny-en-int8.tar.bz2
// rm sherpa-onnx-moonshine-tiny-en-int8.tar.bz2
//
// clang-format on
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sherpa-onnx/c-api/c-api.h"
int32_t main() {
const char *wav_filename =
"./sherpa-onnx-moonshine-tiny-en-int8/test_wavs/0.wav";
const char *preprocessor =
"./sherpa-onnx-moonshine-tiny-en-int8/preprocess.onnx";
const char *encoder = "./sherpa-onnx-moonshine-tiny-en-int8/encode.int8.onnx";
const char *uncached_decoder =
"./sherpa-onnx-moonshine-tiny-en-int8/uncached_decode.int8.onnx";
const char *cached_decoder =
"./sherpa-onnx-moonshine-tiny-en-int8/cached_decode.int8.onnx";
const char *tokens = "./sherpa-onnx-moonshine-tiny-en-int8/tokens.txt";
const SherpaOnnxWave *wave = SherpaOnnxReadWave(wav_filename);
if (wave == NULL) {
fprintf(stderr, "Failed to read %s\n", wav_filename);
return -1;
}
// Offline model config
SherpaOnnxOfflineModelConfig offline_model_config;
memset(&offline_model_config, 0, sizeof(offline_model_config));
offline_model_config.debug = 1;
offline_model_config.num_threads = 1;
offline_model_config.provider = "cpu";
offline_model_config.tokens = tokens;
offline_model_config.moonshine.preprocessor = preprocessor;
offline_model_config.moonshine.encoder = encoder;
offline_model_config.moonshine.uncached_decoder = uncached_decoder;
offline_model_config.moonshine.cached_decoder = cached_decoder;
// Recognizer config
SherpaOnnxOfflineRecognizerConfig recognizer_config;
memset(&recognizer_config, 0, sizeof(recognizer_config));
recognizer_config.decoding_method = "greedy_search";
recognizer_config.model_config = offline_model_config;
const SherpaOnnxOfflineRecognizer *recognizer =
SherpaOnnxCreateOfflineRecognizer(&recognizer_config);
if (recognizer == NULL) {
fprintf(stderr, "Please check your config!\n");
SherpaOnnxFreeWave(wave);
return -1;
}
const SherpaOnnxOfflineStream *stream =
SherpaOnnxCreateOfflineStream(recognizer);
SherpaOnnxAcceptWaveformOffline(stream, wave->sample_rate, wave->samples,
wave->num_samples);
SherpaOnnxDecodeOfflineStream(recognizer, stream);
const SherpaOnnxOfflineRecognizerResult *result =
SherpaOnnxGetOfflineStreamResult(stream);
fprintf(stderr, "Decoded text: %s\n", result->text);
SherpaOnnxDestroyOfflineRecognizerResult(result);
SherpaOnnxDestroyOfflineStream(stream);
SherpaOnnxDestroyOfflineRecognizer(recognizer);
SherpaOnnxFreeWave(wave);
return 0;
}