Add Android demo for spoken language identification using Whisper multilingual models (#783)

sherpa-onnx/csrc/audio-tagging-impl.cc

@@ -4,6 +4,8 @@
 
 #include "sherpa-onnx/csrc/audio-tagging-impl.h"
 
+#include <memory>
+
 #if __ANDROID_API__ >= 9
 #include "android/asset_manager.h"
 #include "android/asset_manager_jni.h"

sherpa-onnx/csrc/audio-tagging.cc

@@ -4,6 +4,8 @@
 
 #include "sherpa-onnx/csrc/audio-tagging.h"
 
+#include <string>
+
 #if __ANDROID_API__ >= 9
 #include "android/asset_manager.h"
 #include "android/asset_manager_jni.h"

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

@@ -70,6 +70,23 @@ class OfflineWhisperModel::Impl {
       InitDecoder(buf.data(), buf.size());
     }
   }
+
+  Impl(AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config)
+      : lid_config_(config),
+        env_(ORT_LOGGING_LEVEL_ERROR),
+        sess_opts_(GetSessionOptions(config)),
+        allocator_{} {
+    debug_ = config_.debug;
+    {
+      auto buf = ReadFile(mgr, config.whisper.encoder);
+      InitEncoder(buf.data(), buf.size());
+    }
+
+    {
+      auto buf = ReadFile(mgr, config.whisper.decoder);
+      InitDecoder(buf.data(), buf.size());
+    }
+  }
 #endif
 
   std::pair<Ort::Value, Ort::Value> ForwardEncoder(Ort::Value features) {
@@ -326,6 +343,11 @@ OfflineWhisperModel::OfflineWhisperModel(
 OfflineWhisperModel::OfflineWhisperModel(AAssetManager *mgr,
                                          const OfflineModelConfig &config)
     : impl_(std::make_unique<Impl>(mgr, config)) {}
+
+OfflineWhisperModel::OfflineWhisperModel(
+    AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config)
+    : impl_(std::make_unique<Impl>(mgr, config)) {}
+
 #endif
 
 OfflineWhisperModel::~OfflineWhisperModel() = default;

sherpa-onnx/csrc/offline-whisper-model.h

@@ -31,6 +31,8 @@ class OfflineWhisperModel {
 
 #if __ANDROID_API__ >= 9
   OfflineWhisperModel(AAssetManager *mgr, const OfflineModelConfig &config);
+  OfflineWhisperModel(AAssetManager *mgr,
+                      const SpokenLanguageIdentificationConfig &config);
 #endif
 
   ~OfflineWhisperModel();

sherpa-onnx/csrc/spoken-language-identification-impl.cc

@@ -5,6 +5,11 @@
 
 #include <memory>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/onnx-utils.h"
 #include "sherpa-onnx/csrc/spoken-language-identification-whisper-impl.h"
@@ -85,4 +90,34 @@ SpokenLanguageIdentificationImpl::Create(
   return nullptr;
 }
 
+#if __ANDROID_API__ >= 9
+std::unique_ptr<SpokenLanguageIdentificationImpl>
+SpokenLanguageIdentificationImpl::Create(
+    AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config) {
+  ModelType model_type = ModelType::kUnknown;
+  {
+    if (config.whisper.encoder.empty()) {
+      SHERPA_ONNX_LOGE("Only whisper models are supported at present");
+      exit(-1);
+    }
+    auto buffer = ReadFile(mgr, config.whisper.encoder);
+
+    model_type = GetModelType(buffer.data(), buffer.size(), config.debug);
+  }
+
+  switch (model_type) {
+    case ModelType::kWhisper:
+      return std::make_unique<SpokenLanguageIdentificationWhisperImpl>(mgr,
+                                                                       config);
+    case ModelType::kUnknown:
+      SHERPA_ONNX_LOGE(
+          "Unknown model type for spoken language identification!");
+      return nullptr;
+  }
+
+  // unreachable code
+  return nullptr;
+}
+#endif
+
 }  // namespace sherpa_onnx

sherpa-onnx/csrc/spoken-language-identification-impl.h

@@ -7,6 +7,11 @@
 #include <memory>
 #include <string>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/spoken-language-identification.h"
 
 namespace sherpa_onnx {
@@ -18,6 +23,11 @@ class SpokenLanguageIdentificationImpl {
   static std::unique_ptr<SpokenLanguageIdentificationImpl> Create(
       const SpokenLanguageIdentificationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  static std::unique_ptr<SpokenLanguageIdentificationImpl> Create(
+      AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config);
+#endif
+
   virtual std::unique_ptr<OfflineStream> CreateStream() const = 0;
 
   virtual std::string Compute(OfflineStream *s) const = 0;

sherpa-onnx/csrc/spoken-language-identification-whisper-impl.h

@@ -11,6 +11,11 @@
 #include <utility>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/offline-whisper-model.h"
 #include "sherpa-onnx/csrc/spoken-language-identification-impl.h"
 #include "sherpa-onnx/csrc/transpose.h"
@@ -26,6 +31,15 @@ class SpokenLanguageIdentificationWhisperImpl
     Check();
   }
 
+#if __ANDROID_API__ >= 9
+  SpokenLanguageIdentificationWhisperImpl(
+      AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config)
+      : config_(config),
+        model_(std::make_unique<OfflineWhisperModel>(mgr, config)) {
+    Check();
+  }
+#endif
+
   std::unique_ptr<OfflineStream> CreateStream() const override {
     return std::make_unique<OfflineStream>(WhisperTag{});
   }

sherpa-onnx/csrc/spoken-language-identification.cc

@@ -6,6 +6,11 @@
 
 #include <string>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/file-utils.h"
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/spoken-language-identification-impl.h"
@@ -103,6 +108,12 @@ SpokenLanguageIdentification::SpokenLanguageIdentification(
     const SpokenLanguageIdentificationConfig &config)
     : impl_(SpokenLanguageIdentificationImpl::Create(config)) {}
 
+#if __ANDROID_API__ >= 9
+SpokenLanguageIdentification::SpokenLanguageIdentification(
+    AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config)
+    : impl_(SpokenLanguageIdentificationImpl::Create(mgr, config)) {}
+#endif
+
 SpokenLanguageIdentification::~SpokenLanguageIdentification() = default;
 
 std::unique_ptr<OfflineStream> SpokenLanguageIdentification::CreateStream()

sherpa-onnx/csrc/spoken-language-identification.h

@@ -7,6 +7,11 @@
 #include <memory>
 #include <string>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/offline-stream.h"
 #include "sherpa-onnx/csrc/parse-options.h"
 
@@ -70,6 +75,11 @@ class SpokenLanguageIdentification {
   explicit SpokenLanguageIdentification(
       const SpokenLanguageIdentificationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  SpokenLanguageIdentification(
+      AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config);
+#endif
+
   ~SpokenLanguageIdentification();
 
   // Create a stream to accept audio samples and compute features