Varispeed support for SincResampler.

media/base/sinc_resampler_unittest.cc

Index: media/base/sinc_resampler_unittest.cc
diff --git a/media/base/sinc_resampler_unittest.cc b/media/base/sinc_resampler_unittest.cc
index b7aaec43c2c2d6729f24d8d385f6a88570ed1c88..1b2c338bc38312859df65a01d0fb0914dfc829ca 100644
--- a/media/base/sinc_resampler_unittest.cc
+++ b/media/base/sinc_resampler_unittest.cc
@@ -98,6 +98,24 @@ TEST(SincResamplerTest, Flush) {
     ASSERT_FLOAT_EQ(resampled_destination[i], 0);
 }
 
+// Test flush resets the internal state properly.
+TEST(SincResamplerTest, KernelBench) {
+  MockSource mock_source;
+  SincResampler resampler(
+      kSampleRateRatio,
+      base::Bind(&MockSource::ProvideInput, base::Unretained(&mock_source)));
+  scoped_array<float> resampled_destination(new float[resampler.ChunkSize()]);
+
+  base::TimeTicks start = base::TimeTicks::HighResNow();
+  for (int i = 1; i < 10000; ++i) {
+    resampler.UpdateSampleRateRatio((i % 100) / 100.0);
+  }
+  double total_time_c_ms =
+      (base::TimeTicks::HighResNow() - start).InMillisecondsF();
+  printf("UpdateSampleRateRatio took %.2fms.\n", total_time_c_ms);
+}
+
+
 // Define platform independent function name for Convolve* tests.
 #if defined(ARCH_CPU_X86_FAMILY)
 #define CONVOLVE_FUNC Convolve_SSE