Support whisper models (#238)

sherpa-onnx/csrc/offline-whisper-model-config.cc

@@ -0,0 +1,46 @@
+// sherpa-onnx/csrc/offline-whisper-model-config.cc
+//
+// Copyright (c)  2023  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-whisper-model-config.h"
+
+#include "sherpa-onnx/csrc/file-utils.h"
+#include "sherpa-onnx/csrc/macros.h"
+
+namespace sherpa_onnx {
+
+void OfflineWhisperModelConfig::Register(ParseOptions *po) {
+  po->Register("whisper-encoder", &encoder,
+               "Path to onnx encoder of whisper, e.g., tiny-encoder.onnx, "
+               "medium.en-encoder.onnx.");
+
+  po->Register("whisper-decoder", &decoder,
+               "Path to onnx decoder of whisper, e.g., tiny-decoder.onnx, "
+               "medium.en-decoder.onnx.");
+}
+
+bool OfflineWhisperModelConfig::Validate() const {
+  if (!FileExists(encoder)) {
+    SHERPA_ONNX_LOGE("whisper encoder file %s does not exist", encoder.c_str());
+    return false;
+  }
+
+  if (!FileExists(decoder)) {
+    SHERPA_ONNX_LOGE("whisper decoder file %s does not exist", decoder.c_str());
+    return false;
+  }
+
+  return true;
+}
+
+std::string OfflineWhisperModelConfig::ToString() const {
+  std::ostringstream os;
+
+  os << "OfflineWhisperModelConfig(";
+  os << "encoder=\"" << encoder << "\", ";
+  os << "decoder=\"" << decoder << "\")";
+
+  return os.str();
+}
+
+}  // namespace sherpa_onnx