Make AudioParameters a class instead of a struct

media/audio/mac/audio_input_mac.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 "media/audio/mac/audio_input_mac.h"
 
 #include <CoreServices/CoreServices.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 12 matching lines @@
     : manager_(manager),
       callback_(NULL),
       audio_queue_(NULL),
       buffer_size_bytes_(0),
       started_(false) {
   // We must have a manager.
   DCHECK(manager_);
   // A frame is one sample across all channels. In interleaved audio the per
   // frame fields identify the set of n |channels|. In uncompressed audio, a
   // packet is always one frame.
-  format_.mSampleRate = params.sample_rate;
+  format_.mSampleRate = params.sample_rate();
   format_.mFormatID = kAudioFormatLinearPCM;
   format_.mFormatFlags = kLinearPCMFormatFlagIsPacked |
                          kLinearPCMFormatFlagIsSignedInteger;
-  format_.mBitsPerChannel = params.bits_per_sample;
-  format_.mChannelsPerFrame = params.channels;
+  format_.mBitsPerChannel = params.bits_per_sample();
+  format_.mChannelsPerFrame = params.channels();
   format_.mFramesPerPacket = 1;
-  format_.mBytesPerPacket = (params.bits_per_sample * params.channels) / 8;
+  format_.mBytesPerPacket = (params.bits_per_sample() * params.channels()) / 8;
   format_.mBytesPerFrame = format_.mBytesPerPacket;
   format_.mReserved = 0;
 
-  buffer_size_bytes_ = params.GetPacketSize();
+  buffer_size_bytes_ = params.GetBytesPerBuffer();
 }
 
 PCMQueueInAudioInputStream::~PCMQueueInAudioInputStream() {
   DCHECK(!callback_);
   DCHECK(!audio_queue_);
 }
 
 bool PCMQueueInAudioInputStream::Open() {
   OSStatus err = AudioQueueNewInput(&format_,
                                     &HandleInputBufferStatic,
@@ skipping 145 matching lines @@
       // TODO(joth): PCMQueueOutAudioOutputStream uses callback_ to provide an
       // extra guard for this situation, but it seems to introduce more
       // complications than it solves (memory barrier issues accessing it from
       // multiple threads, looses the means to indicate OnClosed to client).
       // Should determine if we need to do something equivalent here.
       return;
     }
     HandleError(err);
   }
 }