tor-browser

The Tor Browser
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adm_helpers.cc (2590B)

      1 /*
      2 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
      3 *
      4 *  Use of this source code is governed by a BSD-style license
      5 *  that can be found in the LICENSE file in the root of the source
      6 *  tree. An additional intellectual property rights grant can be found
      7 *  in the file PATENTS.  All contributing project authors may
      8 *  be found in the AUTHORS file in the root of the source tree.
      9 */
     10 
     11 #include "media/engine/adm_helpers.h"
     12 
     13 #include "api/audio/audio_device.h"
     14 #include "rtc_base/checks.h"
     15 #include "rtc_base/logging.h"
     16 
     17 namespace webrtc {
     18 namespace adm_helpers {
     19 
     20 // On Windows Vista and newer, Microsoft introduced the concept of "Default
     21 // Communications Device". This means that there are two types of default
     22 // devices (old Wave Audio style default and Default Communications Device).
     23 //
     24 // On Windows systems which only support Wave Audio style default, uses either
     25 // -1 or 0 to select the default device.
     26 //
     27 // Using a #define for AUDIO_DEVICE since we will call *different* versions of
     28 // the ADM functions, depending on the ID type.
     29 #if defined(WEBRTC_WIN)
     30 #define AUDIO_DEVICE_ID \
     31  (AudioDeviceModule::WindowsDeviceType::kDefaultCommunicationDevice)
     32 #else
     33 #define AUDIO_DEVICE_ID (0u)
     34 #endif  // defined(WEBRTC_WIN)
     35 
     36 void Init(AudioDeviceModule* adm) {
     37  RTC_DCHECK(adm);
     38 
     39  RTC_CHECK_EQ(0, adm->Init()) << "Failed to initialize the ADM.";
     40 
     41  // Playout device.
     42  {
     43    if (adm->SetPlayoutDevice(AUDIO_DEVICE_ID) != 0) {
     44      RTC_LOG(LS_ERROR) << "Unable to set playout device.";
     45      return;
     46    }
     47    if (adm->InitSpeaker() != 0) {
     48      RTC_LOG(LS_ERROR) << "Unable to access speaker.";
     49    }
     50 
     51    // Set number of channels
     52    bool available = false;
     53    if (adm->StereoPlayoutIsAvailable(&available) != 0) {
     54      RTC_LOG(LS_ERROR) << "Failed to query stereo playout.";
     55    }
     56    if (adm->SetStereoPlayout(available) != 0) {
     57      RTC_LOG(LS_ERROR) << "Failed to set stereo playout mode.";
     58    }
     59  }
     60 
     61  // Recording device.
     62  {
     63    if (adm->SetRecordingDevice(AUDIO_DEVICE_ID) != 0) {
     64      RTC_LOG(LS_ERROR) << "Unable to set recording device.";
     65      return;
     66    }
     67    if (adm->InitMicrophone() != 0) {
     68      RTC_LOG(LS_ERROR) << "Unable to access microphone.";
     69    }
     70 
     71    // Set number of channels
     72    bool available = false;
     73    if (adm->StereoRecordingIsAvailable(&available) != 0) {
     74      RTC_LOG(LS_ERROR) << "Failed to query stereo recording.";
     75    }
     76    if (adm->SetStereoRecording(available) != 0) {
     77      RTC_LOG(LS_ERROR) << "Failed to set stereo recording mode.";
     78    }
     79  }
     80 }
     81 }  // namespace adm_helpers
     82 }  // namespace webrtc