Add Dart API for FireRedAsr AED Model (#1877)

dart-api-examples/non-streaming-asr/bin/fire-red-asr.dart

@@ -0,0 +1,58 @@
+// Copyright (c)  2025  Xiaomi Corporation
+import 'dart:io';
+
+import 'package:args/args.dart';
+import 'package:sherpa_onnx/sherpa_onnx.dart' as sherpa_onnx;
+
+import './init.dart';
+
+void main(List<String> arguments) async {
+  await initSherpaOnnx();
+
+  final parser = ArgParser()
+    ..addOption('encoder', help: 'Path to the FireRedAsr encoder model')
+    ..addOption('decoder', help: 'Path to FireRedAsr decoder model')
+    ..addOption('tokens', help: 'Path to tokens.txt')
+    ..addOption('input-wav', help: 'Path to input.wav to transcribe');
+
+  final res = parser.parse(arguments);
+  if (res['encoder'] == null ||
+      res['decoder'] == null ||
+      res['tokens'] == null ||
+      res['input-wav'] == null) {
+    print(parser.usage);
+    exit(1);
+  }
+
+  final encoder = res['encoder'] as String;
+  final decoder = res['decoder'] as String;
+  final tokens = res['tokens'] as String;
+  final inputWav = res['input-wav'] as String;
+
+  final fireRedAsr = sherpa_onnx.OfflineFireRedAsrModelConfig(
+    encoder: encoder,
+    decoder: decoder,
+  );
+
+  final modelConfig = sherpa_onnx.OfflineModelConfig(
+    fireRedAsr: fireRedAsr,
+    tokens: tokens,
+    debug: false,
+    numThreads: 1,
+  );
+  final config = sherpa_onnx.OfflineRecognizerConfig(model: modelConfig);
+  final recognizer = sherpa_onnx.OfflineRecognizer(config);
+
+  final waveData = sherpa_onnx.readWave(inputWav);
+  final stream = recognizer.createStream();
+
+  stream.acceptWaveform(
+      samples: waveData.samples, sampleRate: waveData.sampleRate);
+  recognizer.decode(stream);
+
+  final result = recognizer.getResult(stream);
+  print(result.text);
+
+  stream.free();
+  recognizer.free();
+}

dart-api-examples/non-streaming-asr/run-fire-red-asr.sh

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+#!/usr/bin/env bash
+
+set -ex
+
+if [ ! -f ./sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16/encoder.int8.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16.tar.bz2
+  tar xvf sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16.tar.bz2
+  rm sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16.tar.bz2
+  ls -lh sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16
+fi
+
+dart pub get
+
+dart run \
+  ./bin/fire-red-asr.dart \
+  --encoder ./sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16/encoder.int8.onnx \
+  --decoder ./sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16/decoder.int8.onnx \
+  --tokens ./sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16/tokens.txt \
+  --input-wav ./sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16/test_wavs/0.wav