Add a virtual beamforming audio device on ChromeOS.

chromeos/audio/cras_audio_handler.cc

 // Copyright (c) 2013 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 "chromeos/audio/cras_audio_handler.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
+#include "base/sys_info.h"
 #include "chromeos/audio/audio_devices_pref_handler.h"
 #include "chromeos/audio/audio_devices_pref_handler_stub.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 
 using std::max;
 using std::min;
 
 namespace chromeos {
 
 namespace {
@@ skipping 834 matching lines @@
 
   while (!input_devices_pq_.empty())
     input_devices_pq_.pop();
   while (!output_devices_pq_.empty())
     output_devices_pq_.pop();
 
   size_t new_output_device_size = 0;
   size_t new_input_device_size = 0;
   for (size_t i = 0; i < nodes.size(); ++i) {
     AudioDevice device(nodes[i]);
+
+    // TODO(ajm): This is a temporary proof-of-concept hack. These values should
+    // come from the cras configs for each board.
+    if (device.type == AUDIO_TYPE_INTERNAL_MIC) {
+      const std::string& board = base::SysInfo::GetLsbReleaseBoard();
+      if (board.find("nyan_kitty") != std::string::npos) {
+        device.mic_positions = "-0.03 0 0 0.03 0 0";
+      } else if (board.find("peach_pi") != std::string::npos) {
+        device.mic_positions = "-0.025 0 0 0.025 0 0";
+      } else if (board.find("samus") != std::string::npos) {
+        device.mic_positions = "-0.032 0 0 0.032 0 0";
+      } else if (board.find("swanky") != std::string::npos) {
+        device.mic_positions = "-0.026 0 0 0.026 0 0";
+      }
+    }
+
     audio_devices_[device.id] = device;
 
     if (!has_alternative_input_ &&
         device.is_input &&
         device.type != AUDIO_TYPE_INTERNAL_MIC &&
         device.type != AUDIO_TYPE_KEYBOARD_MIC) {
       has_alternative_input_ = true;
     } else if (!has_alternative_output_ &&
                !device.is_input &&
                device.type != AUDIO_TYPE_INTERNAL_SPEAKER) {
@@ skipping 163 matching lines @@
                      hdmi_rediscover_grace_period_duration_in_ms_),
       this, &CrasAudioHandler::UpdateAudioAfterHDMIRediscoverGracePeriod);
 }
 
 void CrasAudioHandler::SetHDMIRediscoverGracePeriodForTesting(
     int duration_in_ms) {
   hdmi_rediscover_grace_period_duration_in_ms_ = duration_in_ms;
 }
 
 }  // namespace chromeos