stream.wasm : fix invalid memory access when no segments (#1902)

No segments may be returned when a smaller sample buffer (EG 2048 samples) is sent to the worker.

diff --git a/examples/stream.wasm/emscripten.cpp b/examples/stream.wasm/emscripten.cpp
index 71acffba296c59abecd14f1158741f1ff2838b4c..43e71bf23f0ad1292640ef182535051dcd723acd 100644 (file)
--- a/examples/stream.wasm/emscripten.cpp
+++ b/examples/stream.wasm/emscripten.cpp
@@ -103,11 +103,11 @@ void stream_main(size_t index) {
 
             {
                 const int n_segments = whisper_full_n_segments(ctx);
-                for (int i = n_segments - 1; i < n_segments; ++i) {
-                    const char * text = whisper_full_get_segment_text(ctx, i);
+                if (n_segments > 0) {
+                    const char * text = whisper_full_get_segment_text(ctx, n_segments - 1);
 
-                    const int64_t t0 = whisper_full_get_segment_t0(ctx, i);
-                    const int64_t t1 = whisper_full_get_segment_t1(ctx, i);
+                    const int64_t t0 = whisper_full_get_segment_t0(ctx, n_segments - 1);
+                    const int64_t t1 = whisper_full_get_segment_t1(ctx, n_segments - 1);
 
                     printf("transcribed: %s\n", text);