Add new class AudioBufferQueue.

media/base/test_helpers.h

Index: media/base/test_helpers.h
diff --git a/media/base/test_helpers.h b/media/base/test_helpers.h
index bc505d43a604f4368f2a29fe385f7eb2a0d4cc04..7eebfd9fb0232fed0c993f326fb242cffc9ba02c 100644
--- a/media/base/test_helpers.h
+++ b/media/base/test_helpers.h
@@ -8,16 +8,20 @@
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "media/base/pipeline_status.h"
+#include "media/base/sample_format.h"
 #include "media/base/video_decoder_config.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "ui/gfx/size.h"
 
 namespace base {
 class MessageLoop;
+class TimeDelta;
 }
 
 namespace media {
 
+class AudioBuffer;
+
 // Return a callback that expects to be run once.
 base::Closure NewExpectedClosure();
 PipelineStatusCB NewExpectedStatusCB(PipelineStatus status);
@@ -79,6 +83,51 @@ class TestVideoConfig {
   DISALLOW_IMPLICIT_CONSTRUCTORS(TestVideoConfig);
 };
 
+// Create an AudioBuffer containing |frames| frames of data, where each sample
+// is of type T. Each frame will have the data from |channels| channels
+// interleaved. |start| and |increment| are used to specify the values for the
+// samples. Since this is interleaved data, channel 0 data will be:
+//   |start|
+//   |start| + |channels| * |increment|
+//   |start| + 2 * |channels| * |increment|, and so on.
+// Data for subsequent channels is similar. No check is done that |format|
+// requires data to be of type T, but it is verified that |format| is an
+// interleaved format.
+//
+// |start_time| will be used as the start time for the samples. Duration is set
+// to 1 second per frame, to simplify calculations.
+template <class T>
+scoped_refptr<AudioBuffer> MakeInterleavedAudioBuffer(
+    SampleFormat format,
+    int channels,
+    T start,
+    T increment,
+    int frames,
+    base::TimeDelta start_time);
+
+// Create an AudioBuffer containing |frames| frames of data, where each sample
+// is of type T. Since this is planar data, there will be a block for each of
+// |channel| channels. |start| and |increment| are used to specify the values
+// for the samples, which are created in channel order. Since this is planar
+// data, channel 0 data will be:
+//   |start|
+//   |start| + |increment|
+//   |start| + 2 * |increment|, and so on.
+// Data for channel 1 will follow where channel 0 ends. Subsequent channels are
+// similar. No check is done that |format| requires data to be of type T, but it
+// is verified that |format| is a planar format.
+//
+// |start_time| will be used as the start time for the samples. Duration is set
+// to 1 second per frame, to simplify calculations.
+template <class T>
+scoped_refptr<AudioBuffer> MakePlanarAudioBuffer(
+    SampleFormat format,
+    int channels,
+    T start,
+    T increment,
+    int frames,
+    base::TimeDelta start_time);
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_TEST_HELPERS_H_