34 lines
876 B
Dart
34 lines
876 B
Dart
// Copyright (c) 2024 Xiaomi Corporation
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import 'dart:ffi';
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import 'dart:typed_data';
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import 'package:ffi/ffi.dart';
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import './sherpa_onnx_bindings.dart';
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class WaveData {
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WaveData({required this.samples, required this.sampleRate});
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/// normalized to [-1, 1]
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Float32List samples;
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int sampleRate;
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}
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WaveData readWave(String filename) {
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final Pointer<Utf8> str = filename.toNativeUtf8();
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Pointer<SherpaOnnxWave> wave =
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SherpaOnnxBindings.readWave?.call(str) ?? nullptr;
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calloc.free(str);
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if (wave == nullptr) {
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return WaveData(samples: Float32List(0), sampleRate: 0);
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}
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final samples = wave.ref.samples.asTypedList(wave.ref.numSamples);
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final newSamples = Float32List.fromList(samples);
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int sampleRate = wave.ref.sampleRate;
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SherpaOnnxBindings.freeWave?.call(wave);
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return WaveData(samples: newSamples, sampleRate: sampleRate);
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}
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