Add C++ runtime for speech enhancement GTCRN models (#1977)

See also https://github.com/Xiaobin-Rong/gtcrn

sherpa-onnx/csrc/offline-speech-denoiser.cc

@@ -0,0 +1,64 @@
+// sherpa-onnx/csrc/offline-speech-denoiser.h
+//
+// Copyright (c)  2025  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-speech-denoiser.h"
+
+#include "sherpa-onnx/csrc/offline-speech-denoiser-impl.h"
+
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
+#if __OHOS__
+#include "rawfile/raw_file_manager.h"
+#endif
+
+namespace sherpa_onnx {
+
+void OfflineSpeechDenoiserConfig::Register(ParseOptions *po) {
+  model.Register(po);
+}
+
+bool OfflineSpeechDenoiserConfig::Validate() const { return model.Validate(); }
+
+std::string OfflineSpeechDenoiserConfig::ToString() const {
+  std::ostringstream os;
+
+  os << "OfflineSpeechDenoiserConfig(";
+  os << "model=" << model.ToString() << ")";
+  return os.str();
+}
+
+template <typename Manager>
+OfflineSpeechDenoiser::OfflineSpeechDenoiser(
+    Manager *mgr, const OfflineSpeechDenoiserConfig &config)
+    : impl_(OfflineSpeechDenoiserImpl::Create(mgr, config)) {}
+
+OfflineSpeechDenoiser::OfflineSpeechDenoiser(
+    const OfflineSpeechDenoiserConfig &config)
+    : impl_(OfflineSpeechDenoiserImpl::Create(config)) {}
+
+OfflineSpeechDenoiser::~OfflineSpeechDenoiser() = default;
+
+DenoisedAudio OfflineSpeechDenoiser::Run(const float *samples, int32_t n,
+                                         int32_t sample_rate) const {
+  return impl_->Run(samples, n, sample_rate);
+}
+
+int32_t OfflineSpeechDenoiser::GetSampleRate() const {
+  return impl_->GetSampleRate();
+}
+
+#if __ANDROID_API__ >= 9
+template OfflineSpeechDenoiser::OfflineSpeechDenoiser(
+    AAssetManager *mgr, const OfflineSpeechDenoiserConfig &config);
+#endif
+
+#if __OHOS__
+template OfflineSpeechDenoiser::OfflineSpeechDenoiser(
+    NativeResourceManager *mgr, const OfflineSpeechDenoiserConfig &config);
+#endif
+
+}  // namespace sherpa_onnx