Increase the buffer size in AudioRendererImpl to fix muted playback rate

content/browser/renderer_host/media/audio_common.cc

-// Copyright (c) 2011 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/browser/renderer_host/media/audio_common.h"
-
-#include "base/time.h"
-#include "media/audio/audio_parameters.h"
-
-// 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 int 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 int kMaxSamplesPerHardwarePacket = 64 * 1024;
-
-// This constant governs the hardware audio buffer size, this value should be
-// chosen carefully.
-// This value is selected so that we have 8192 samples for 48khz streams.
-static const int kMillisecondsPerHardwarePacket = 170;
-
-uint32 SelectSamplesPerPacket(const AudioParameters& params) {
-  // Select the number of samples that can provide at least
-  // |kMillisecondsPerHardwarePacket| worth of audio data.
-  int samples = kMinSamplesPerHardwarePacket;
-  while (samples <= kMaxSamplesPerHardwarePacket &&
-         samples * base::Time::kMillisecondsPerSecond <
-         params.sample_rate * kMillisecondsPerHardwarePacket) {
-    samples *= 2;
-  }
-  return samples;
-}