AudioBus: Add a ToInterleavedFloat() method to AudioBus

media/base/audio_bus.cc

Index: media/base/audio_bus.cc
diff --git a/media/base/audio_bus.cc b/media/base/audio_bus.cc
index 2b0379a7542bc4672abd51d256394b4700f7c94d..102da474840f4d57a2df56d3148afc7e0b173d11 100644
--- a/media/base/audio_bus.cc
+++ b/media/base/audio_bus.cc
@@ -297,6 +297,20 @@ void AudioBus::ToInterleaved(int frames, int bytes_per_sample,
   ToInterleavedPartial(0, frames, bytes_per_sample, dest);
 }
 
+void AudioBus::ToInterleavedFloat(int source_offset,
+                                  int destination_offset,
+                                  int num_samples,
+                                  int num_channels,
+                                  float* buffer) const {

[mcasas, 2016/03/09 00:24:18]

DCHECK_EQ(num_channels, channels());  ?

Also check the arguments with a CheckOverflow()
like in l.317. 

+  for (int ch = 0; ch < this->channels(); ++ch) {

[mcasas, 2016/03/09 00:24:18]

No |this|.

[eklavyamirani, 2016/03/15 03:48:13]

Done.

+    const float* src = this->channel(ch) + source_offset;
+    const float* const src_end = src + num_samples;
+    float* dest = buffer + destination_offset + ch;
+    for (; src < src_end; ++src, dest += num_channels)
+      *dest = *src;
+  }
+}
+
 // TODO(dalecurtis): See if intrinsic optimizations help any here.
 void AudioBus::ToInterleavedPartial(int start_frame, int frames,
                                     int bytes_per_sample, void* dest) const {