1 files changed, 101 insertions, 0 deletions
diff --git a/media/libcubeb/test/test_overload_callback.cpp b/media/libcubeb/test/test_overload_callback.cpp
new file mode 100644
index 0000000000..c8f4dafd17
--- /dev/null
+++ b/media/libcubeb/test/test_overload_callback.cpp
@@ -0,0 +1,101 @@
+/*
+ * Copyright © 2017 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#include "gtest/gtest.h"
+#if !defined(_XOPEN_SOURCE)
+#define _XOPEN_SOURCE 600
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <memory>
+#include <atomic>
+#include "cubeb/cubeb.h"
+//#define ENABLE_NORMAL_LOG
+//#define ENABLE_VERBOSE_LOG
+#include "common.h"
+
+#define SAMPLE_FREQUENCY 48000
+#define STREAM_FORMAT CUBEB_SAMPLE_S16LE
+
+std::atomic<bool> load_callback{ false };
+
+long data_cb(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
+{
+  if (load_callback) {
+    fprintf(stderr, "Sleeping...\n");
+    delay(100000);
+    fprintf(stderr, "Sleeping done\n");
+  }
+  return nframes;
+}
+
+void state_cb(cubeb_stream * stream, void * /*user*/, cubeb_state state)
+{
+  ASSERT_TRUE(!!stream);
+
+  switch (state) {
+  case CUBEB_STATE_STARTED:
+    fprintf(stderr, "stream started\n"); break;
+  case CUBEB_STATE_STOPPED:
+    fprintf(stderr, "stream stopped\n"); break;
+  case CUBEB_STATE_DRAINED:
+    FAIL() << "this test is not supposed to drain"; break;
+  case CUBEB_STATE_ERROR:
+    fprintf(stderr, "stream error\n"); break;
+  default:
+    FAIL() << "this test is not supposed to have a weird state"; break;
+  }
+}
+
+TEST(cubeb, overload_callback)
+{
+  cubeb * ctx;
+  cubeb_stream * stream;
+  cubeb_stream_params output_params;
+  int r;
+  uint32_t latency_frames = 0;
+
+  r = common_init(&ctx, "Cubeb callback overload");
+  ASSERT_EQ(r, CUBEB_OK);
+
+  std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
+    cleanup_cubeb_at_exit(ctx, cubeb_destroy);
+
+  // This test is specifically designed to test a behaviour of the WASAPI
+  // backend in a specific scenario.
+  if (strcmp(cubeb_get_backend_id(ctx), "wasapi") != 0) {
+    return;
+  }
+
+  output_params.format = STREAM_FORMAT;
+  output_params.rate = 48000;
+  output_params.channels = 2;
+  output_params.layout = CUBEB_LAYOUT_STEREO;
+  output_params.prefs = CUBEB_STREAM_PREF_NONE;
+
+  r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);
+  ASSERT_EQ(r, CUBEB_OK);
+
+  r = cubeb_stream_init(ctx, &stream, "Cubeb",
+                        NULL, NULL, NULL, &output_params,
+                        latency_frames, data_cb, state_cb, NULL);
+  ASSERT_EQ(r, CUBEB_OK);
+
+  std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
+    cleanup_stream_at_exit(stream, cubeb_stream_destroy);
+
+  cubeb_stream_start(stream);
+  delay(500);
+  // This causes the callback to sleep for a large number of seconds.
+  load_callback = true;
+  delay(500);
+  cubeb_stream_stop(stream);
+}
+
+#undef SAMPLE_FREQUENCY
+#undef STREAM_FORMAT