110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
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/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This sub-API supports the following functionalities:
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//
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// - Audio device handling.
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// - Device information.
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// - CPU load monitoring.
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//
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// Usage example, omitting error checking:
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//
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// using namespace webrtc;
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// VoiceEngine* voe = VoiceEngine::Create();
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// VoEBase* base = VoEBase::GetInterface(voe);
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// VoEHardware* hardware = VoEHardware::GetInterface(voe);
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// base->Init();
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// ...
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// int n_devices = hardware->GetNumOfPlayoutDevices();
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// ...
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// base->Terminate();
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// base->Release();
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// hardware->Release();
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// VoiceEngine::Delete(voe);
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//
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#ifndef WEBRTC_VOICE_ENGINE_VOE_HARDWARE_H
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#define WEBRTC_VOICE_ENGINE_VOE_HARDWARE_H
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#include "webrtc/common_types.h"
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namespace webrtc {
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class VoiceEngine;
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class WEBRTC_DLLEXPORT VoEHardware {
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public:
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// Factory for the VoEHardware sub-API. Increases an internal
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// reference counter if successful. Returns NULL if the API is not
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// supported or if construction fails.
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static VoEHardware* GetInterface(VoiceEngine* voiceEngine);
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// Releases the VoEHardware sub-API and decreases an internal
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// reference counter. Returns the new reference count. This value should
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// be zero for all sub-API:s before the VoiceEngine object can be safely
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// deleted.
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virtual int Release() = 0;
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// Gets the number of audio devices available for recording.
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virtual int GetNumOfRecordingDevices(int& devices) = 0;
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// Gets the number of audio devices available for playout.
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virtual int GetNumOfPlayoutDevices(int& devices) = 0;
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// Gets the name of a specific recording device given by an |index|.
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// On Windows Vista/7, it also retrieves an additional unique ID
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// (GUID) for the recording device.
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virtual int GetRecordingDeviceName(int index,
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char strNameUTF8[128],
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char strGuidUTF8[128]) = 0;
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// Gets the name of a specific playout device given by an |index|.
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// On Windows Vista/7, it also retrieves an additional unique ID
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// (GUID) for the playout device.
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virtual int GetPlayoutDeviceName(int index,
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char strNameUTF8[128],
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char strGuidUTF8[128]) = 0;
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// Sets the audio device used for recording.
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virtual int SetRecordingDevice(
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int index,
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StereoChannel recordingChannel = kStereoBoth) = 0;
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// Sets the audio device used for playout.
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virtual int SetPlayoutDevice(int index) = 0;
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// Sets the type of audio device layer to use.
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virtual int SetAudioDeviceLayer(AudioLayers audioLayer) = 0;
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// Gets the currently used (active) audio device layer.
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virtual int GetAudioDeviceLayer(AudioLayers& audioLayer) = 0;
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// Native sample rate controls (samples/sec)
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virtual int SetRecordingSampleRate(unsigned int samples_per_sec) = 0;
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virtual int RecordingSampleRate(unsigned int* samples_per_sec) const = 0;
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virtual int SetPlayoutSampleRate(unsigned int samples_per_sec) = 0;
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virtual int PlayoutSampleRate(unsigned int* samples_per_sec) const = 0;
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// Queries and controls platform audio effects on Android devices.
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virtual bool BuiltInAECIsAvailable() const = 0;
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virtual int EnableBuiltInAEC(bool enable) = 0;
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virtual bool BuiltInAGCIsAvailable() const = 0;
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virtual int EnableBuiltInAGC(bool enable) = 0;
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virtual bool BuiltInNSIsAvailable() const = 0;
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virtual int EnableBuiltInNS(bool enable) = 0;
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protected:
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VoEHardware() {}
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virtual ~VoEHardware() {}
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};
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} // namespace webrtc
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#endif // WEBRTC_VOICE_ENGINE_VOE_HARDWARE_H
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