Adding AudioDeviceDataObserver interface

webrtc/modules/audio_device/include/audio_transport_capture.h

+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_TRANSPORT_CAPTURE_H_
+#define WEBRTC_MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_TRANSPORT_CAPTURE_H_
+
+#include "webrtc/base/refcountedobject.h"
+#include "webrtc/modules/audio_device/include/audio_device.h"
+#include "webrtc/modules/include/module.h"
+
+namespace webrtc {
+
+class AudioTransportCapture {
+ public:
+  virtual void CaptureRecordedData(
+    const void* audioSamples, const size_t nSamples,

[henrika_webrtc, 2017/03/23 09:02:42]

Can't we use new notation in this interface?
audio_samples, samples, bytes_per_sec etc.

[lliuu, 2017/03/24 00:12:58]

Acknowledged.

+    const size_t nBytesPerSample, const size_t nChannels,
+    const uint32_t samplesPerSec) = 0;
+
+  virtual void CapturePlayoutData(
+    const void* audioSamples, const size_t nSamples,
+    const size_t nBytesPerSample, const size_t nChannels,
+    const uint32_t samplesPerSec) = 0;
+
+  AudioTransportCapture() = default;
+  virtual ~AudioTransportCapture() = default;
+};
+
+// Creates an ADM instance with AudioTransportCapture callback.
+rtc::scoped_refptr<AudioDeviceModule>
+  CreateAudioDeviceWithTransportCapture(
+      const int32_t id,
+      const AudioDeviceModule::AudioLayer audio_layer,
+      AudioTransportCapture* transport_cb);
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_TRANSPORT_CAPTURE_H_
+