Get PulseAudio implementation working.

media/base/audio_bus_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits>
 
 #include "base/stringprintf.h"
 #include "base/time.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_bus.h"
@@ skipping 316 matching lines @@
   }
   {
     SCOPED_TRACE("int32");
     int32 test_array[arraysize(kTestVectorInt32)];
     bus->ToInterleaved(bus->frames(), sizeof(*kTestVectorInt32), test_array);
     ASSERT_EQ(memcmp(
         test_array, kTestVectorInt32, arraysize(kTestVectorInt32)), 0);
   }
 }
 
+// Verify ToInterleavedPartial() interleaves audio correctly.
+TEST_F(AudioBusTest, ToInterleavedPartial) {
+  // Only interleave the middle two frames in each channel.
+  static const int kPartialStart = 1;
+  static const int kPartialFrames = 2;
+  ASSERT_LE(kPartialStart + kPartialFrames, kTestVectorFrames);
+
+  scoped_ptr<AudioBus> expected = AudioBus::Create(
+      kTestVectorChannels, kTestVectorFrames);
+  for (int ch = 0; ch < kTestVectorChannels; ++ch) {
+    memcpy(expected->channel(ch), kTestVectorResult[ch],
+           kTestVectorFrames * sizeof(*expected->channel(ch)));
+  }
+
+  int16 test_array[arraysize(kTestVectorInt16)];
+  expected->ToInterleavedPartial(
+      kPartialStart, kPartialFrames, sizeof(*kTestVectorInt16), test_array);
+  ASSERT_EQ(memcmp(
+      test_array, kTestVectorInt16 + kPartialStart * kTestVectorChannels,
+      kPartialFrames * sizeof(*kTestVectorInt16)), 0);
+}
+
 }  // namespace media