Add onnxruntime gpu for cmake (#153)

* add onnxruntime gpu for cmake

* fix clang

* fix typo

* cpplint

@@ -19,6 +19,7 @@ option(SHERPA_ONNX_ENABLE_PORTAUDIO "Whether to build with portaudio" ON)
 option(SHERPA_ONNX_ENABLE_JNI "Whether to build JNI internface" OFF)
 option(SHERPA_ONNX_ENABLE_C_API "Whether to build C API" ON)
 option(SHERPA_ONNX_ENABLE_WEBSOCKET "Whether to build webscoket server/client" ON)
+option(SHERPA_ONNX_ENABLE_GPU "Enable ONNX Runtime GPU support" OFF)
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
@@ -71,6 +72,7 @@ message(STATUS "SHERPA_ONNX_ENABLE_PORTAUDIO ${SHERPA_ONNX_ENABLE_PORTAUDIO}")
 message(STATUS "SHERPA_ONNX_ENABLE_JNI ${SHERPA_ONNX_ENABLE_JNI}")
 message(STATUS "SHERPA_ONNX_ENABLE_C_API ${SHERPA_ONNX_ENABLE_C_API}")
 message(STATUS "SHERPA_ONNX_ENABLE_WEBSOCKET ${SHERPA_ONNX_ENABLE_WEBSOCKET}")
+message(STATUS "SHERPA_ONNX_ENABLE_GPU ${SHERPA_ONNX_ENABLE_GPU}")
 
 set(CMAKE_CXX_STANDARD 14 CACHE STRING "The C++ version to be used.")
 set(CMAKE_CXX_EXTENSIONS OFF)

@@ -33,6 +33,14 @@ function(download_onnxruntime)
     #
     # ./include
     #    It contains all the needed header files
+    if(SHERPA_ONNX_ENABLE_GPU)
+      set(onnxruntime_URL "https://github.com/microsoft/onnxruntime/releases/download/v1.14.1/onnxruntime-linux-x64-gpu-1.14.1.tgz")
+    endif()
+    # After downloading, it contains:
+    #  ./lib/libonnxruntime.so.1.14.1
+    #  ./lib/libonnxruntime.so, which is a symlink to lib/libonnxruntime.so.1.14.1
+    #  ./lib/libonnxruntime_providers_cuda.so
+    # ./include, which contains all the needed header files
   elseif(APPLE)
     # If you don't have access to the Internet,
     # please pre-download onnxruntime
@@ -97,6 +105,7 @@ function(download_onnxruntime)
     message(FATAL_ERROR "Only support Linux, macOS, and Windows at present. Will support other OSes later")
   endif()
 
+  if(NOT SHERPA_ONNX_ENABLE_GPU)
     foreach(f IN LISTS possible_file_locations)
       if(EXISTS ${f})
         set(onnxruntime_URL  "${f}")
@@ -112,6 +121,12 @@ function(download_onnxruntime)
         ${onnxruntime_URL2}
       URL_HASH          ${onnxruntime_HASH}
     )
+  else()
+    FetchContent_Declare(onnxruntime
+      URL
+        ${onnxruntime_URL}
+    )
+  endif()
 
   FetchContent_GetProperties(onnxruntime)
   if(NOT onnxruntime_POPULATED)
@@ -134,6 +149,19 @@ function(download_onnxruntime)
     IMPORTED_LOCATION ${location_onnxruntime}
     INTERFACE_INCLUDE_DIRECTORIES "${onnxruntime_SOURCE_DIR}/include"
   )
+
+  if(SHERPA_ONNX_ENABLE_GPU)
+    find_library(location_onnxruntime_cuda_lib onnxruntime_providers_cuda
+      PATHS
+      "${onnxruntime_SOURCE_DIR}/lib"
+      NO_CMAKE_SYSTEM_PATH
+    )
+    add_library(onnxruntime_providers_cuda SHARED IMPORTED)
+    set_target_properties(onnxruntime_providers_cuda PROPERTIES
+      IMPORTED_LOCATION ${location_onnxruntime_cuda_lib}
+    )
+  endif()
+
   if(WIN32)
     set_property(TARGET onnxruntime
       PROPERTY
@@ -185,6 +213,12 @@ if(DEFINED ENV{SHERPA_ONNXRUNTIME_LIB_DIR})
   if(NOT EXISTS ${location_onnxruntime_lib})
     set(location_onnxruntime_lib $ENV{SHERPA_ONNXRUNTIME_LIB_DIR}/libonnxruntime.a)
   endif()
+  if(SHERPA_ONNX_ENABLE_GPU)
+    set(location_onnxruntime_cuda_lib $ENV{SHERPA_ONNXRUNTIME_LIB_DIR}/libonnxruntime_providers_cuda.so)
+    if(NOT EXISTS ${location_onnxruntime_cuda_lib})
+      set(location_onnxruntime_cuda_lib $ENV{SHERPA_ONNXRUNTIME_LIB_DIR}/libonnxruntime_providers_cuda.a)
+    endif()
+  endif()
 else()
   find_library(location_onnxruntime_lib onnxruntime
     PATHS
@@ -192,9 +226,21 @@ else()
       /usr/lib
       /usr/local/lib
   )
+
+  if(SHERPA_ONNX_ENABLE_GPU)
+    find_library(location_onnxruntime_cuda_lib onnxruntime_providers_cuda
+      PATHS
+        /lib
+        /usr/lib
+        /usr/local/lib
+    )
+  endif()
 endif()
 
 message(STATUS "location_onnxruntime_lib: ${location_onnxruntime_lib}")
+if(SHERPA_ONNX_ENABLE_GPU)
+  message(STATUS "location_onnxruntime_cuda_lib: ${location_onnxruntime_cuda_lib}")
+endif()
 
 if(location_onnxruntime_header_dir AND location_onnxruntime_lib)
   add_library(onnxruntime SHARED IMPORTED)
@@ -202,6 +248,12 @@ if(location_onnxruntime_header_dir AND location_onnxruntime_lib)
     IMPORTED_LOCATION ${location_onnxruntime_lib}
     INTERFACE_INCLUDE_DIRECTORIES "${location_onnxruntime_header_dir}"
   )
+  if(SHERPA_ONNX_ENABLE_GPU AND location_onnxruntime_cuda_lib)
+    add_library(onnxruntime_providers_cuda SHARED IMPORTED)
+    set_target_properties(onnxruntime_providers_cuda PROPERTIES
+      IMPORTED_LOCATION ${location_onnxruntime_cuda_lib}
+    )
+  endif()
 else()
   message(STATUS "Could not find a pre-installed onnxruntime. Downloading pre-compiled onnxruntime")
   download_onnxruntime()

@@ -78,6 +78,12 @@ target_link_libraries(sherpa-onnx-core
   kaldi-native-fbank-core
 )
 
+if(SHERPA_ONNX_ENABLE_GPU)
+  target_link_libraries(sherpa-onnx-core
+    onnxruntime_providers_cuda
+  )
+endif()
+
 if(SHERPA_ONNX_ENABLE_CHECK)
   target_compile_definitions(sherpa-onnx-core PUBLIC SHERPA_ONNX_ENABLE_CHECK=1)
 

@@ -4,8 +4,10 @@
 
 #include "sherpa-onnx/csrc/session.h"
 
+#include <algorithm>
 #include <string>
 #include <utility>
+#include <vector>
 
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/provider.h"
@@ -27,10 +29,20 @@ static Ort::SessionOptions GetSessionOptionsImpl(int32_t num_threads,
     case Provider::kCPU:
       break;  // nothing to do for the CPU provider
     case Provider::kCUDA: {
+      std::vector<std::string> available_providers =
+          Ort::GetAvailableProviders();
+      if (std::find(available_providers.begin(), available_providers.end(),
+                    "CUDAExecutionProvider") != available_providers.end()) {
+        // The CUDA provider is available, proceed with setting the options
         OrtCUDAProviderOptions options;
         options.device_id = 0;
         // set more options on need
         sess_opts.AppendExecutionProvider_CUDA(options);
+      } else {
+        SHERPA_ONNX_LOGE(
+            "Please compile with -DSHERPA_ONNX_ENABLE_GPU=ON. Fallback to "
+            "cpu!");
+      }
       break;
     }
     case Provider::kCoreML: {