Add C API for offline TTS. (#373)

.github/workflows/linux.yaml

@@ -12,6 +12,7 @@ on:
       - '.github/scripts/test-online-paraformer.sh'
       - '.github/scripts/test-offline-transducer.sh'
       - '.github/scripts/test-offline-ctc.sh'
+      - '.github/scripts/test-offline-tts.sh'
       - 'CMakeLists.txt'
       - 'cmake/**'
       - 'sherpa-onnx/csrc/*'
@@ -26,6 +27,7 @@ on:
       - '.github/scripts/test-online-paraformer.sh'
       - '.github/scripts/test-offline-transducer.sh'
       - '.github/scripts/test-offline-ctc.sh'
+      - '.github/scripts/test-offline-tts.sh'
       - 'CMakeLists.txt'
       - 'cmake/**'
       - 'sherpa-onnx/csrc/*'
@@ -49,7 +51,7 @@ jobs:
         shared_lib: [ON, OFF]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0
 
@@ -76,6 +78,14 @@ jobs:
           file build/bin/sherpa-onnx
           readelf -d build/bin/sherpa-onnx
 
+      - name: Test offline TTS
+        shell: bash
+        run: |
+          export PATH=$PWD/build/bin:$PATH
+          export EXE=sherpa-onnx-offline-tts
+
+          .github/scripts/test-offline-tts.sh
+
       - name: Test online paraformer
         shell: bash
         run: |
@@ -150,3 +160,8 @@ jobs:
           file_glob: true
           overwrite: true
           file: sherpa-onnx-*linux-x64.tar.bz2
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: tts-generated-test-files
+          path: tts