Add a virtual beamforming audio device on ChromeOS.

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),
-      channels_(0),
-      effects_(NO_EFFECTS) {
-}
+    : AudioParameters(AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_NONE, 0, 0, 0) {}
 
-AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
-                                 int sample_rate, int bits_per_sample,
-                                 int frames_per_buffer)
-    : 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)),
-      effects_(NO_EFFECTS) {
-}
+AudioParameters::AudioParameters(Format format,
+                                 ChannelLayout channel_layout,
+                                 int sample_rate,
+                                 int bits_per_sample,
+                                 int frames_per_buffer,
+                                 const std::vector<Point>& mic_positions,
+                                 int effects)
+    : AudioParameters(format,
+                      ChannelLayoutToChannelCount(channel_layout),
+                      channel_layout,
+                      sample_rate,
+                      bits_per_sample,
+                      frames_per_buffer,
+                      mic_positions,
+                      effects) {}
 
-AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
-                                 int sample_rate, int bits_per_sample,
-                                 int frames_per_buffer, int effects)
-    : 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)),
-      effects_(effects) {
-}
-
-AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
-                                 int channels, int sample_rate,
-                                 int bits_per_sample, int frames_per_buffer,
+AudioParameters::AudioParameters(Format format,
+                                 int channels,
+                                 ChannelLayout channel_layout,
+                                 int sample_rate,
+                                 int bits_per_sample,
+                                 int frames_per_buffer,
+                                 const std::vector<Point>& mic_positions,
                                  int effects)
     : format_(format),
       channel_layout_(channel_layout),
       sample_rate_(sample_rate),
       bits_per_sample_(bits_per_sample),
       frames_per_buffer_(frames_per_buffer),
       channels_(channels),
-      effects_(effects) {
-}
+      mic_positions_(mic_positions),
+      effects_(effects) {}
+
+AudioParameters::~AudioParameters() {}
 
 void AudioParameters::Reset(Format format, ChannelLayout channel_layout,
                             int channels, int sample_rate,
                             int bits_per_sample, int frames_per_buffer) {
   format_ = format;
   channel_layout_ = channel_layout;
   channels_ = channels;
   sample_rate_ = sample_rate;
   bits_per_sample_ = bits_per_sample;
   frames_per_buffer_ = frames_per_buffer;
+  mic_positions_.clear();
+  effects_ = NO_EFFECTS;
 }
 
 bool AudioParameters::IsValid() const {
   return (channels_ > 0) && (channels_ <= media::limits::kMaxChannels) &&
          (channel_layout_ > CHANNEL_LAYOUT_UNSUPPORTED) &&
          (sample_rate_ >= media::limits::kMinSampleRate) &&
          (sample_rate_ <= media::limits::kMaxSampleRate) &&
          (bits_per_sample_ > 0) &&
          (bits_per_sample_ <= media::limits::kMaxBitsPerSample) &&
          (frames_per_buffer_ > 0) &&
@@ skipping 25 matching lines @@
   return channels_ * bits_per_sample_ / 8;
 }
 
 base::TimeDelta AudioParameters::GetBufferDuration() const {
   return base::TimeDelta::FromMicroseconds(static_cast<int64>(
       frames_per_buffer_ * base::Time::kMicrosecondsPerSecond /
       static_cast<float>(sample_rate_)));
 }
 
 bool AudioParameters::Equals(const AudioParameters& other) const {
-  return format_ == other.format() &&
-         sample_rate_ == other.sample_rate() &&
+  return format_ == other.format() && sample_rate_ == other.sample_rate() &&
          channel_layout_ == other.channel_layout() &&
          channels_ == other.channels() &&
          bits_per_sample_ == other.bits_per_sample() &&
          frames_per_buffer_ == other.frames_per_buffer() &&
-         effects_ == other.effects();
+         mic_positions_ == other.mic_positions_ && effects_ == other.effects();
 }
 
 }  // namespace media