Add a virtual beamforming audio device on ChromeOS.

content/common/media/media_param_traits.cc

Index: content/common/media/media_param_traits.cc
diff --git a/content/common/media/media_param_traits.cc b/content/common/media/media_param_traits.cc
index 19c3b87975badff70e7cce7c8eeb4aa5b63b443a..3f25d376ba834b2f7ecca323be22ea469616d172 100644
--- a/content/common/media/media_param_traits.cc
+++ b/content/common/media/media_param_traits.cc
@@ -9,6 +9,7 @@
 #include "content/common/media/video_capture_messages.h"
 #include "ipc/ipc_message_utils.h"
 #include "media/audio/audio_parameters.h"
+#include "media/audio/point.h"
 #include "media/base/limits.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 
@@ -27,6 +28,7 @@ void ParamTraits<AudioParameters>::Write(Message* m,
   WriteParam(m, p.frames_per_buffer());
   WriteParam(m, p.channels());
   WriteParam(m, p.effects());
+  WriteParam(m, p.mic_positions());
 }
 
 bool ParamTraits<AudioParameters>::Read(const Message* m,
@@ -35,17 +37,20 @@ bool ParamTraits<AudioParameters>::Read(const Message* m,
   AudioParameters::Format format;
   ChannelLayout channel_layout;
   int sample_rate, bits_per_sample, frames_per_buffer, channels, effects;
+  std::vector<media::Point> mic_positions;
 
   if (!ReadParam(m, iter, &format) || !ReadParam(m, iter, &channel_layout) ||
       !ReadParam(m, iter, &sample_rate) ||
       !ReadParam(m, iter, &bits_per_sample) ||
       !ReadParam(m, iter, &frames_per_buffer) ||
-      !ReadParam(m, iter, &channels) || !ReadParam(m, iter, &effects)) {
+      !ReadParam(m, iter, &channels) || !ReadParam(m, iter, &effects) ||
+      !ReadParam(m, iter, &mic_positions)) {
     return false;
   }
 
-  AudioParameters params(format, channel_layout, channels, sample_rate,
-                         bits_per_sample, frames_per_buffer, effects);
+  AudioParameters params(format, channels, channel_layout, sample_rate,
+                         bits_per_sample, frames_per_buffer, mic_positions,
+                         effects);
   *r = params;
   return r->IsValid();
 }
@@ -55,6 +60,31 @@ void ParamTraits<AudioParameters>::Log(const AudioParameters& p,
   l->append(base::StringPrintf("<AudioParameters>"));
 }
 
+void ParamTraits<media::Point>::Write(Message* m, const media::Point& p) {

[ajm, 2015/09/02 18:23:04]

OS X has a "struct Point" in the global namespace so we need to fully qualify
here.

+  WriteParam(m, p.x());
+  WriteParam(m, p.y());
+  WriteParam(m, p.z());
+}
+
+bool ParamTraits<media::Point>::Read(const Message* m,
+                                     base::PickleIterator* iter,
+                                     media::Point* r) {
+  float x, y, z;
+
+  if (!ReadParam(m, iter, &x) || !ReadParam(m, iter, &y) ||
+      !ReadParam(m, iter, &z)) {
+    return false;
+  }
+
+  media::Point point(x, y, z);
+  *r = point;
+  return r->IsValid();
+}
+
+void ParamTraits<media::Point>::Log(const media::Point& p, std::string* l) {
+  l->append(base::StringPrintf("<Point> %s", p.ToString().c_str()));
+}
+
 void ParamTraits<VideoCaptureFormat>::Write(Message* m,
                                             const VideoCaptureFormat& p) {
   WriteParam(m, p.frame_size);