small fixes

Author: csukuangfj

sherpa-onnx/csrc/offline-tts-kitten-impl.h

@@ -261,7 +261,7 @@ class OfflineTtsKittenImpl : public OfflineTtsImpl {
     std::vector<std::vector<int64_t>> batch_x;
 
     int32_t batch_size = 1;
-    batch_x.reserve(config_.max_num_sentences);
+    batch_x.reserve(batch_size);
     int32_t num_batches = x_size / batch_size;
 
     if (config_.model.debug) {

sherpa-onnx/csrc/offline-tts-kitten-model-config.cc

@@ -35,6 +35,16 @@ bool OfflineTtsKittenModelConfig::Validate() const {
     return false;
   }
 
+  if (voices.empty()) {
+    SHERPA_ONNX_LOGE("Please provide --kitten-voices");
+    return false;
+  }
+
+  if (!FileExists(voices)) {
+    SHERPA_ONNX_LOGE("--kitten-voices: '%s' does not exist", voices.c_str());
+    return false;
+  }
+
   if (tokens.empty()) {
     SHERPA_ONNX_LOGE("Please provide --kitten-tokens");
     return false;
@@ -78,6 +88,14 @@ bool OfflineTtsKittenModelConfig::Validate() const {
     return false;
   }
 
+  if (length_scale <= 0) {
+    SHERPA_ONNX_LOGE(
+        "Please provide a positive length_scale for --kitten-length-scale. "
+        "Given: %.3f",
+        length_scale);
+    return false;
+  }
+
   return true;
 }
 

sherpa-onnx/csrc/offline-tts-kitten-model.cc

@@ -63,7 +63,7 @@ class OfflineTtsKittenModel::Impl {
     if (x_shape[0] != 1) {
       SHERPA_ONNX_LOGE("Support only batch_size == 1. Given: %d",
                        static_cast<int32_t>(x_shape[0]));
-      exit(-1);
+      SHERPA_ONNX_EXIT(-1);
     }
 
     int32_t num_speakers = meta_data_.num_speakers;
@@ -223,7 +223,7 @@ class OfflineTtsKittenModel::Impl {
   OfflineTtsKittenModelMetaData meta_data_;
   std::vector<int32_t> style_dim_;
 
-  // (num_speakers, style_dim_[0], style_dim_[2])
+  // (num_speakers, style_dim_[1])
   std::vector<float> styles_;
 };