Fix muted audio when playback rate != 1.0 or 0.0

media/audio/audio_util.cc

Index: media/audio/audio_util.cc
diff --git a/media/audio/audio_util.cc b/media/audio/audio_util.cc
index b4b8751885b570b2ebdabb30ae78f6122e7ca20a..6c5680d1a28d584b618b65aaab98843b5dbb5d6d 100644
--- a/media/audio/audio_util.cc
+++ b/media/audio/audio_util.cc
@@ -49,30 +49,6 @@ static void AdjustVolume(Format* buf_out,
   }
 }
 
-// Type is the datatype of a data point in the waveform (i.e. uint8, int16,
-// int32, etc).
-template <class Type>
-static void DoCrossfade(int bytes_to_crossfade, int number_of_channels,
-                        int bytes_per_channel, const Type* src, Type* dest) {
-  DCHECK_EQ(sizeof(Type), static_cast<size_t>(bytes_per_channel));
-  int number_of_samples =
-      bytes_to_crossfade / (bytes_per_channel * number_of_channels);
-
-  const Type* dest_end = dest + number_of_samples * number_of_channels;
-  const Type* src_end = src + number_of_samples * number_of_channels;
-
-  for (int i = 0; i < number_of_samples; ++i) {
-    double crossfade_ratio = static_cast<double>(i) / number_of_samples;
-    for (int j = 0; j < number_of_channels; ++j) {
-      DCHECK_LT(dest, dest_end);
-      DCHECK_LT(src, src_end);
-      *dest = (*dest) * (1.0 - crossfade_ratio) + (*src) * crossfade_ratio;
-      ++src;
-      ++dest;
-    }
-  }
-}
-
 static const int kChannel_L = 0;
 static const int kChannel_R = 1;
 static const int kChannel_C = 2;
@@ -413,27 +389,4 @@ bool IsWASAPISupported() {
 
 #endif
 
-void Crossfade(int bytes_to_crossfade, int number_of_channels,
-               int bytes_per_channel, const uint8* src, uint8* dest) {
-  // TODO(vrk): The type punning below is no good!
-  switch (bytes_per_channel) {
-    case 4:
-      DoCrossfade(bytes_to_crossfade, number_of_channels, bytes_per_channel,
-                  reinterpret_cast<const int32*>(src),
-                  reinterpret_cast<int32*>(dest));
-      break;
-    case 2:
-      DoCrossfade(bytes_to_crossfade, number_of_channels, bytes_per_channel,
-                  reinterpret_cast<const int16*>(src),
-                  reinterpret_cast<int16*>(dest));
-      break;
-    case 1:
-      DoCrossfade(bytes_to_crossfade, number_of_channels, bytes_per_channel,
-                  src, dest);
-      break;
-    default:
-      NOTREACHED() << "Unsupported audio bit depth in crossfade.";
-  }
-}
-
 }  // namespace media