Fix muted audio when playback rate != 1.0 or 0.0

content/renderer/media/audio_hardware.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 "content/renderer/media/audio_hardware.h"
 
 #include "base/logging.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/render_thread_impl.h"
 
@@ skipping 31 matching lines @@
     uint32 buffer_size = 0;
     RenderThreadImpl::current()->Send(
         new ViewHostMsg_GetHardwareBufferSize(&buffer_size));
     output_buffer_size = buffer_size;
   }
 
   return output_buffer_size;
 }
 
 size_t GetHighLatencyOutputBufferSize(int sample_rate) {
+  // TODO(vrk/crogers): The buffer sizes that this function computes is probably
+  // overly conservative. However, reducing the buffer size to 2048-8192 bytes
+  // caused crbug.com/108396. This computation should be revisited while making
+  // sure crbug.com/108396 doesn't happen again.
+
   // The minimum number of samples in a hardware packet.
   // This value is selected so that we can handle down to 5khz sample rate.
   static const size_t kMinSamplesPerHardwarePacket = 1024;
 
   // The maximum number of samples in a hardware packet.
   // This value is selected so that we can handle up to 192khz sample rate.
   static const size_t kMaxSamplesPerHardwarePacket = 64 * 1024;
 
   // This constant governs the hardware audio buffer size, this value should be
   // chosen carefully.
@@ skipping 27 matching lines @@
 void ResetCache() {
   DCHECK(RenderThreadImpl::current() != NULL);
 
   output_sample_rate = 0.0;
   input_sample_rate = 0.0;
   output_buffer_size = 0;
   input_channel_count = 0;
 }
 
 }  // namespace audio_hardware