1 files changed, 47 insertions, 0 deletions
diff --git a/third_party/rust/cubeb-sys/libcubeb/test/test_latency.cpp b/third_party/rust/cubeb-sys/libcubeb/test/test_latency.cpp
new file mode 100644
index 0000000000..522851044a
--- /dev/null
+++ b/third_party/rust/cubeb-sys/libcubeb/test/test_latency.cpp
@@ -0,0 +1,47 @@
+#include "gtest/gtest.h"
+#include <stdlib.h>
+#include <memory>
+#include "cubeb/cubeb.h"
+//#define ENABLE_NORMAL_LOG
+//#define ENABLE_VERBOSE_LOG
+#include "common.h"
+
+TEST(cubeb, latency)
+{
+  cubeb * ctx = NULL;
+  int r;
+  uint32_t max_channels;
+  uint32_t preferred_rate;
+  uint32_t latency_frames;
+
+  r = common_init(&ctx, "Cubeb audio test");
+  ASSERT_EQ(r, CUBEB_OK);
+
+  std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
+    cleanup_cubeb_at_exit(ctx, cubeb_destroy);
+
+  r = cubeb_get_max_channel_count(ctx, &max_channels);
+  ASSERT_TRUE(r == CUBEB_OK || r == CUBEB_ERROR_NOT_SUPPORTED);
+  if (r == CUBEB_OK) {
+    ASSERT_GT(max_channels, 0u);
+  }
+
+  r = cubeb_get_preferred_sample_rate(ctx, &preferred_rate);
+  ASSERT_TRUE(r == CUBEB_OK || r == CUBEB_ERROR_NOT_SUPPORTED);
+  if (r == CUBEB_OK) {
+    ASSERT_GT(preferred_rate, 0u);
+  }
+
+  cubeb_stream_params params = {
+    CUBEB_SAMPLE_FLOAT32NE,
+    preferred_rate,
+    max_channels,
+    CUBEB_LAYOUT_UNDEFINED,
+    CUBEB_STREAM_PREF_NONE
+  };
+  r = cubeb_get_min_latency(ctx, &params, &latency_frames);
+  ASSERT_TRUE(r == CUBEB_OK || r == CUBEB_ERROR_NOT_SUPPORTED);
+  if (r == CUBEB_OK) {
+    ASSERT_GT(latency_frames, 0u);
+  }
+}