1 files changed, 81 insertions, 0 deletions
diff --git a/third_party/libwebrtc/webrtc/media/engine/adm_helpers.cc b/third_party/libwebrtc/webrtc/media/engine/adm_helpers.cc
new file mode 100644
index 0000000000..119cc64451
--- /dev/null
+++ b/third_party/libwebrtc/webrtc/media/engine/adm_helpers.cc
@@ -0,0 +1,81 @@
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "media/engine/adm_helpers.h"
+
+#include "modules/audio_device/include/audio_device.h"
+#include "rtc_base/logging.h"
+
+namespace webrtc {
+namespace adm_helpers {
+
+// On Windows Vista and newer, Microsoft introduced the concept of "Default
+// Communications Device". This means that there are two types of default
+// devices (old Wave Audio style default and Default Communications Device).
+//
+// On Windows systems which only support Wave Audio style default, uses either
+// -1 or 0 to select the default device.
+//
+// Using a #define for AUDIO_DEVICE since we will call *different* versions of
+// the ADM functions, depending on the ID type.
+#if defined(WEBRTC_WIN)
+#define AUDIO_DEVICE_ID \
+    (AudioDeviceModule::WindowsDeviceType::kDefaultCommunicationDevice)
+#else
+#define AUDIO_DEVICE_ID (0u)
+#endif  // defined(WEBRTC_WIN)
+
+void Init(AudioDeviceModule* adm) {
+  RTC_DCHECK(adm);
+
+  RTC_CHECK_EQ(0, adm->Init()) << "Failed to initialize the ADM.";
+
+  // Playout device.
+  {
+    if (adm->SetPlayoutDevice(AUDIO_DEVICE_ID) != 0) {
+      RTC_LOG(LS_ERROR) << "Unable to set playout device.";
+      return;
+    }
+    if (adm->InitSpeaker() != 0) {
+      RTC_LOG(LS_ERROR) << "Unable to access speaker.";
+    }
+
+    // Set number of channels
+    bool available = false;
+    if (adm->StereoPlayoutIsAvailable(&available) != 0) {
+      RTC_LOG(LS_ERROR) << "Failed to query stereo playout.";
+    }
+    if (adm->SetStereoPlayout(available) != 0) {
+      RTC_LOG(LS_ERROR) << "Failed to set stereo playout mode.";
+    }
+  }
+
+  // Recording device.
+  {
+    if (adm->SetRecordingDevice(AUDIO_DEVICE_ID) != 0) {
+      RTC_LOG(LS_ERROR) << "Unable to set recording device.";
+      return;
+    }
+    if (adm->InitMicrophone() != 0) {
+      RTC_LOG(LS_ERROR) << "Unable to access microphone.";
+    }
+
+    // Set number of channels
+    bool available = false;
+    if (adm->StereoRecordingIsAvailable(&available) != 0) {
+      RTC_LOG(LS_ERROR) << "Failed to query stereo recording.";
+    }
+    if (adm->SetStereoRecording(available) != 0) {
+      RTC_LOG(LS_ERROR) << "Failed to set stereo recording mode.";
+    }
+  }
+}
+}  // namespace adm_helpers
+}  // namespace webrtc