Pass more detailed audio hardware configuration information to the renderer

media/audio/audio_parameters.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/audio_parameters.h"
 
+#include "base/logging.h"
 #include "media/base/limits.h"
 
 namespace media {
 
 AudioParameters::AudioParameters()
     : format_(AUDIO_PCM_LINEAR),
       channel_layout_(CHANNEL_LAYOUT_NONE),
       sample_rate_(0),
       bits_per_sample_(0),
       frames_per_buffer_(0),
@@ skipping 20 matching lines @@
     : format_(format),
       channel_layout_(channel_layout),
       sample_rate_(sample_rate),
       bits_per_sample_(bits_per_sample),
       frames_per_buffer_(frames_per_buffer),
       channels_(ChannelLayoutToChannelCount(channel_layout)),
       input_channels_(input_channels) {
 }
 
 void AudioParameters::Reset(Format format, ChannelLayout channel_layout,
-                            int input_channels,
+                            int channels, int input_channels,
                             int sample_rate, int bits_per_sample,
                             int frames_per_buffer) {
+  if (channel_layout != CHANNEL_LAYOUT_DISCRETE)
+    DCHECK_EQ(channels, ChannelLayoutToChannelCount(channel_layout));
+
   format_ = format;
   channel_layout_ = channel_layout;
+  channels_ = channels;
   input_channels_ = input_channels;
   sample_rate_ = sample_rate;
   bits_per_sample_ = bits_per_sample;
   frames_per_buffer_ = frames_per_buffer;
-  channels_ = ChannelLayoutToChannelCount(channel_layout);
 }
 
 bool AudioParameters::IsValid() const {
   return (format_ >= AUDIO_PCM_LINEAR) &&
          (format_ < AUDIO_LAST_FORMAT) &&
          (channels_ > 0) &&
          (channels_ <= media::limits::kMaxChannels) &&
          (channel_layout_ > CHANNEL_LAYOUT_UNSUPPORTED) &&
          (channel_layout_ < CHANNEL_LAYOUT_MAX) &&
          (input_channels_ >= 0) &&
@@ skipping 11 matching lines @@
 }
 
 int AudioParameters::GetBytesPerSecond() const {
   return sample_rate_ * GetBytesPerFrame();
 }
 
 int AudioParameters::GetBytesPerFrame() const {
   return channels_ * bits_per_sample_ / 8;
 }
 
+void AudioParameters::SetDiscreteChannels(int channels) {
+  channel_layout_ = CHANNEL_LAYOUT_DISCRETE;
+  channels_ = channels;
+}
+
 }  // namespace media