1 files changed, 373 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_data_observer.cc b/third_party/libwebrtc/modules/audio_device/audio_device_data_observer.cc
new file mode 100644
index 0000000000..0524830327
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_data_observer.cc
@@ -0,0 +1,373 @@
+/*
+ *  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 "modules/audio_device/include/audio_device_data_observer.h"
+
+#include "api/make_ref_counted.h"
+#include "modules/audio_device/include/audio_device_defines.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+namespace {
+
+// A wrapper over AudioDeviceModule that registers itself as AudioTransport
+// callback and redirects the PCM data to AudioDeviceDataObserver callback.
+class ADMWrapper : public AudioDeviceModule, public AudioTransport {
+ public:
+  ADMWrapper(rtc::scoped_refptr<AudioDeviceModule> impl,
+             AudioDeviceDataObserver* legacy_observer,
+             std::unique_ptr<AudioDeviceDataObserver> observer)
+      : impl_(impl),
+        legacy_observer_(legacy_observer),
+        observer_(std::move(observer)) {
+    is_valid_ = impl_.get() != nullptr;
+  }
+  ADMWrapper(AudioLayer audio_layer,
+             TaskQueueFactory* task_queue_factory,
+             AudioDeviceDataObserver* legacy_observer,
+             std::unique_ptr<AudioDeviceDataObserver> observer)
+      : ADMWrapper(AudioDeviceModule::Create(audio_layer, task_queue_factory),
+                   legacy_observer,
+                   std::move(observer)) {}
+  ~ADMWrapper() override {
+    audio_transport_ = nullptr;
+    observer_ = nullptr;
+  }
+
+  // Make sure we have a valid ADM before returning it to user.
+  bool IsValid() { return is_valid_; }
+
+  int32_t RecordedDataIsAvailable(const void* audioSamples,
+                                  size_t nSamples,
+                                  size_t nBytesPerSample,
+                                  size_t nChannels,
+                                  uint32_t samples_per_sec,
+                                  uint32_t total_delay_ms,
+                                  int32_t clockDrift,
+                                  uint32_t currentMicLevel,
+                                  bool keyPressed,
+                                  uint32_t& newMicLevel) override {
+    return RecordedDataIsAvailable(
+        audioSamples, nSamples, nBytesPerSample, nChannels, samples_per_sec,
+        total_delay_ms, clockDrift, currentMicLevel, keyPressed, newMicLevel,
+        /*capture_timestamp_ns=*/absl::nullopt);
+  }
+
+  // AudioTransport methods overrides.
+  int32_t RecordedDataIsAvailable(
+      const void* audioSamples,
+      size_t nSamples,
+      size_t nBytesPerSample,
+      size_t nChannels,
+      uint32_t samples_per_sec,
+      uint32_t total_delay_ms,
+      int32_t clockDrift,
+      uint32_t currentMicLevel,
+      bool keyPressed,
+      uint32_t& newMicLevel,
+      absl::optional<int64_t> capture_timestamp_ns) override {
+    int32_t res = 0;
+    // Capture PCM data of locally captured audio.
+    if (observer_) {
+      observer_->OnCaptureData(audioSamples, nSamples, nBytesPerSample,
+                               nChannels, samples_per_sec);
+    }
+
+    // Send to the actual audio transport.
+    if (audio_transport_) {
+      res = audio_transport_->RecordedDataIsAvailable(
+          audioSamples, nSamples, nBytesPerSample, nChannels, samples_per_sec,
+          total_delay_ms, clockDrift, currentMicLevel, keyPressed, newMicLevel,
+          capture_timestamp_ns);
+    }
+
+    return res;
+  }
+
+  int32_t NeedMorePlayData(const size_t nSamples,
+                           const size_t nBytesPerSample,
+                           const size_t nChannels,
+                           const uint32_t samples_per_sec,
+                           void* audioSamples,
+                           size_t& nSamplesOut,
+                           int64_t* elapsed_time_ms,
+                           int64_t* ntp_time_ms) override {
+    int32_t res = 0;
+    // Set out parameters to safe values to be sure not to return corrupted
+    // data.
+    nSamplesOut = 0;
+    *elapsed_time_ms = -1;
+    *ntp_time_ms = -1;
+    // Request data from audio transport.
+    if (audio_transport_) {
+      res = audio_transport_->NeedMorePlayData(
+          nSamples, nBytesPerSample, nChannels, samples_per_sec, audioSamples,
+          nSamplesOut, elapsed_time_ms, ntp_time_ms);
+    }
+
+    // Capture rendered data.
+    if (observer_) {
+      observer_->OnRenderData(audioSamples, nSamples, nBytesPerSample,
+                              nChannels, samples_per_sec);
+    }
+
+    return res;
+  }
+
+  void PullRenderData(int bits_per_sample,
+                      int sample_rate,
+                      size_t number_of_channels,
+                      size_t number_of_frames,
+                      void* audio_data,
+                      int64_t* elapsed_time_ms,
+                      int64_t* ntp_time_ms) override {
+    RTC_DCHECK_NOTREACHED();
+  }
+
+  // Override AudioDeviceModule's RegisterAudioCallback method to remember the
+  // actual audio transport (e.g.: voice engine).
+  int32_t RegisterAudioCallback(AudioTransport* audio_callback) override {
+    // Remember the audio callback to forward PCM data
+    audio_transport_ = audio_callback;
+    return 0;
+  }
+
+  // AudioDeviceModule pass through method overrides.
+  int32_t ActiveAudioLayer(AudioLayer* audio_layer) const override {
+    return impl_->ActiveAudioLayer(audio_layer);
+  }
+  int32_t Init() override {
+    int res = impl_->Init();
+    if (res != 0) {
+      return res;
+    }
+    // Register self as the audio transport callback for underlying ADM impl.
+    impl_->RegisterAudioCallback(this);
+    return res;
+  }
+  int32_t Terminate() override { return impl_->Terminate(); }
+  bool Initialized() const override { return impl_->Initialized(); }
+  int16_t PlayoutDevices() override { return impl_->PlayoutDevices(); }
+  int16_t RecordingDevices() override { return impl_->RecordingDevices(); }
+  int32_t PlayoutDeviceName(uint16_t index,
+                            char name[kAdmMaxDeviceNameSize],
+                            char guid[kAdmMaxGuidSize]) override {
+    return impl_->PlayoutDeviceName(index, name, guid);
+  }
+  int32_t RecordingDeviceName(uint16_t index,
+                              char name[kAdmMaxDeviceNameSize],
+                              char guid[kAdmMaxGuidSize]) override {
+    return impl_->RecordingDeviceName(index, name, guid);
+  }
+  int32_t SetPlayoutDevice(uint16_t index) override {
+    return impl_->SetPlayoutDevice(index);
+  }
+  int32_t SetPlayoutDevice(WindowsDeviceType device) override {
+    return impl_->SetPlayoutDevice(device);
+  }
+  int32_t SetRecordingDevice(uint16_t index) override {
+    return impl_->SetRecordingDevice(index);
+  }
+  int32_t SetRecordingDevice(WindowsDeviceType device) override {
+    return impl_->SetRecordingDevice(device);
+  }
+  int32_t PlayoutIsAvailable(bool* available) override {
+    return impl_->PlayoutIsAvailable(available);
+  }
+  int32_t InitPlayout() override { return impl_->InitPlayout(); }
+  bool PlayoutIsInitialized() const override {
+    return impl_->PlayoutIsInitialized();
+  }
+  int32_t RecordingIsAvailable(bool* available) override {
+    return impl_->RecordingIsAvailable(available);
+  }
+  int32_t InitRecording() override { return impl_->InitRecording(); }
+  bool RecordingIsInitialized() const override {
+    return impl_->RecordingIsInitialized();
+  }
+  int32_t StartPlayout() override { return impl_->StartPlayout(); }
+  int32_t StopPlayout() override { return impl_->StopPlayout(); }
+  bool Playing() const override { return impl_->Playing(); }
+  int32_t StartRecording() override { return impl_->StartRecording(); }
+  int32_t StopRecording() override { return impl_->StopRecording(); }
+  bool Recording() const override { return impl_->Recording(); }
+  int32_t InitSpeaker() override { return impl_->InitSpeaker(); }
+  bool SpeakerIsInitialized() const override {
+    return impl_->SpeakerIsInitialized();
+  }
+  int32_t InitMicrophone() override { return impl_->InitMicrophone(); }
+  bool MicrophoneIsInitialized() const override {
+    return impl_->MicrophoneIsInitialized();
+  }
+  int32_t SpeakerVolumeIsAvailable(bool* available) override {
+    return impl_->SpeakerVolumeIsAvailable(available);
+  }
+  int32_t SetSpeakerVolume(uint32_t volume) override {
+    return impl_->SetSpeakerVolume(volume);
+  }
+  int32_t SpeakerVolume(uint32_t* volume) const override {
+    return impl_->SpeakerVolume(volume);
+  }
+  int32_t MaxSpeakerVolume(uint32_t* max_volume) const override {
+    return impl_->MaxSpeakerVolume(max_volume);
+  }
+  int32_t MinSpeakerVolume(uint32_t* min_volume) const override {
+    return impl_->MinSpeakerVolume(min_volume);
+  }
+  int32_t MicrophoneVolumeIsAvailable(bool* available) override {
+    return impl_->MicrophoneVolumeIsAvailable(available);
+  }
+  int32_t SetMicrophoneVolume(uint32_t volume) override {
+    return impl_->SetMicrophoneVolume(volume);
+  }
+  int32_t MicrophoneVolume(uint32_t* volume) const override {
+    return impl_->MicrophoneVolume(volume);
+  }
+  int32_t MaxMicrophoneVolume(uint32_t* max_volume) const override {
+    return impl_->MaxMicrophoneVolume(max_volume);
+  }
+  int32_t MinMicrophoneVolume(uint32_t* min_volume) const override {
+    return impl_->MinMicrophoneVolume(min_volume);
+  }
+  int32_t SpeakerMuteIsAvailable(bool* available) override {
+    return impl_->SpeakerMuteIsAvailable(available);
+  }
+  int32_t SetSpeakerMute(bool enable) override {
+    return impl_->SetSpeakerMute(enable);
+  }
+  int32_t SpeakerMute(bool* enabled) const override {
+    return impl_->SpeakerMute(enabled);
+  }
+  int32_t MicrophoneMuteIsAvailable(bool* available) override {
+    return impl_->MicrophoneMuteIsAvailable(available);
+  }
+  int32_t SetMicrophoneMute(bool enable) override {
+    return impl_->SetMicrophoneMute(enable);
+  }
+  int32_t MicrophoneMute(bool* enabled) const override {
+    return impl_->MicrophoneMute(enabled);
+  }
+  int32_t StereoPlayoutIsAvailable(bool* available) const override {
+    return impl_->StereoPlayoutIsAvailable(available);
+  }
+  int32_t SetStereoPlayout(bool enable) override {
+    return impl_->SetStereoPlayout(enable);
+  }
+  int32_t StereoPlayout(bool* enabled) const override {
+    return impl_->StereoPlayout(enabled);
+  }
+  int32_t StereoRecordingIsAvailable(bool* available) const override {
+    return impl_->StereoRecordingIsAvailable(available);
+  }
+  int32_t SetStereoRecording(bool enable) override {
+    return impl_->SetStereoRecording(enable);
+  }
+  int32_t StereoRecording(bool* enabled) const override {
+    return impl_->StereoRecording(enabled);
+  }
+  int32_t PlayoutDelay(uint16_t* delay_ms) const override {
+    return impl_->PlayoutDelay(delay_ms);
+  }
+  bool BuiltInAECIsAvailable() const override {
+    return impl_->BuiltInAECIsAvailable();
+  }
+  bool BuiltInAGCIsAvailable() const override {
+    return impl_->BuiltInAGCIsAvailable();
+  }
+  bool BuiltInNSIsAvailable() const override {
+    return impl_->BuiltInNSIsAvailable();
+  }
+  int32_t EnableBuiltInAEC(bool enable) override {
+    return impl_->EnableBuiltInAEC(enable);
+  }
+  int32_t EnableBuiltInAGC(bool enable) override {
+    return impl_->EnableBuiltInAGC(enable);
+  }
+  int32_t EnableBuiltInNS(bool enable) override {
+    return impl_->EnableBuiltInNS(enable);
+  }
+  int32_t GetPlayoutUnderrunCount() const override {
+    return impl_->GetPlayoutUnderrunCount();
+  }
+// Only supported on iOS.
+#if defined(WEBRTC_IOS)
+  int GetPlayoutAudioParameters(AudioParameters* params) const override {
+    return impl_->GetPlayoutAudioParameters(params);
+  }
+  int GetRecordAudioParameters(AudioParameters* params) const override {
+    return impl_->GetRecordAudioParameters(params);
+  }
+#endif  // WEBRTC_IOS
+
+ protected:
+  rtc::scoped_refptr<AudioDeviceModule> impl_;
+  AudioDeviceDataObserver* legacy_observer_ = nullptr;
+  std::unique_ptr<AudioDeviceDataObserver> observer_;
+  AudioTransport* audio_transport_ = nullptr;
+  bool is_valid_ = false;
+};
+
+}  // namespace
+
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    rtc::scoped_refptr<AudioDeviceModule> impl,
+    std::unique_ptr<AudioDeviceDataObserver> observer) {
+  auto audio_device = rtc::make_ref_counted<ADMWrapper>(impl, observer.get(),
+                                                        std::move(observer));
+
+  if (!audio_device->IsValid()) {
+    return nullptr;
+  }
+
+  return audio_device;
+}
+
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    rtc::scoped_refptr<AudioDeviceModule> impl,
+    AudioDeviceDataObserver* legacy_observer) {
+  auto audio_device =
+      rtc::make_ref_counted<ADMWrapper>(impl, legacy_observer, nullptr);
+
+  if (!audio_device->IsValid()) {
+    return nullptr;
+  }
+
+  return audio_device;
+}
+
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    AudioDeviceModule::AudioLayer audio_layer,
+    TaskQueueFactory* task_queue_factory,
+    std::unique_ptr<AudioDeviceDataObserver> observer) {
+  auto audio_device = rtc::make_ref_counted<ADMWrapper>(
+      audio_layer, task_queue_factory, observer.get(), std::move(observer));
+
+  if (!audio_device->IsValid()) {
+    return nullptr;
+  }
+
+  return audio_device;
+}
+
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    AudioDeviceModule::AudioLayer audio_layer,
+    TaskQueueFactory* task_queue_factory,
+    AudioDeviceDataObserver* legacy_observer) {
+  auto audio_device = rtc::make_ref_counted<ADMWrapper>(
+      audio_layer, task_queue_factory, legacy_observer, nullptr);
+
+  if (!audio_device->IsValid()) {
+    return nullptr;
+  }
+
+  return audio_device;
+}
+}  // namespace webrtc