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| 1 /* | |
| 2 * Copyright (c) 2011 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 // This sub-API supports the following functionalities: | |
| 12 // | |
| 13 // - Audio device handling. | |
| 14 // - Device information. | |
| 15 // - CPU load monitoring. | |
| 16 // | |
| 17 // Usage example, omitting error checking: | |
| 18 // | |
| 19 // using namespace webrtc; | |
| 20 // VoiceEngine* voe = VoiceEngine::Create(); | |
| 21 // VoEBase* base = VoEBase::GetInterface(voe); | |
| 22 // VoEHardware* hardware = VoEHardware::GetInterface(voe); | |
| 23 // base->Init(); | |
| 24 // ... | |
| 25 // int n_devices = hardware->GetNumOfPlayoutDevices(); | |
| 26 // ... | |
| 27 // base->Terminate(); | |
| 28 // base->Release(); | |
| 29 // hardware->Release(); | |
| 30 // VoiceEngine::Delete(voe); | |
| 31 // | |
| 32 #ifndef WEBRTC_VOICE_ENGINE_VOE_HARDWARE_H | |
| 33 #define WEBRTC_VOICE_ENGINE_VOE_HARDWARE_H | |
| 34 | |
| 35 #include "webrtc/common_types.h" | |
| 36 | |
| 37 namespace webrtc { | |
| 38 | |
| 39 class VoiceEngine; | |
| 40 | |
| 41 class WEBRTC_DLLEXPORT VoEHardware { | |
| 42 public: | |
| 43 // Factory for the VoEHardware sub-API. Increases an internal | |
| 44 // reference counter if successful. Returns NULL if the API is not | |
| 45 // supported or if construction fails. | |
| 46 static VoEHardware* GetInterface(VoiceEngine* voiceEngine); | |
| 47 | |
| 48 // Releases the VoEHardware sub-API and decreases an internal | |
| 49 // reference counter. Returns the new reference count. This value should | |
| 50 // be zero for all sub-API:s before the VoiceEngine object can be safely | |
| 51 // deleted. | |
| 52 virtual int Release() = 0; | |
| 53 | |
| 54 // Gets the number of audio devices available for recording. | |
| 55 virtual int GetNumOfRecordingDevices(int& devices) = 0; | |
| 56 | |
| 57 // Gets the number of audio devices available for playout. | |
| 58 virtual int GetNumOfPlayoutDevices(int& devices) = 0; | |
| 59 | |
| 60 // Gets the name of a specific recording device given by an |index|. | |
| 61 // On Windows Vista/7, it also retrieves an additional unique ID | |
| 62 // (GUID) for the recording device. | |
| 63 virtual int GetRecordingDeviceName(int index, | |
| 64 char strNameUTF8[128], | |
| 65 char strGuidUTF8[128]) = 0; | |
| 66 | |
| 67 // Gets the name of a specific playout device given by an |index|. | |
| 68 // On Windows Vista/7, it also retrieves an additional unique ID | |
| 69 // (GUID) for the playout device. | |
| 70 virtual int GetPlayoutDeviceName(int index, | |
| 71 char strNameUTF8[128], | |
| 72 char strGuidUTF8[128]) = 0; | |
| 73 | |
| 74 // Sets the audio device used for recording. | |
| 75 virtual int SetRecordingDevice( | |
| 76 int index, | |
| 77 StereoChannel recordingChannel = kStereoBoth) = 0; | |
| 78 | |
| 79 // Sets the audio device used for playout. | |
| 80 virtual int SetPlayoutDevice(int index) = 0; | |
| 81 | |
| 82 // Sets the type of audio device layer to use. | |
| 83 virtual int SetAudioDeviceLayer(AudioLayers audioLayer) = 0; | |
| 84 | |
| 85 // Gets the currently used (active) audio device layer. | |
| 86 virtual int GetAudioDeviceLayer(AudioLayers& audioLayer) = 0; | |
| 87 | |
| 88 // Native sample rate controls (samples/sec) | |
| 89 virtual int SetRecordingSampleRate(unsigned int samples_per_sec) = 0; | |
| 90 virtual int RecordingSampleRate(unsigned int* samples_per_sec) const = 0; | |
| 91 virtual int SetPlayoutSampleRate(unsigned int samples_per_sec) = 0; | |
| 92 virtual int PlayoutSampleRate(unsigned int* samples_per_sec) const = 0; | |
| 93 | |
| 94 // Queries and controls platform audio effects on Android devices. | |
| 95 virtual bool BuiltInAECIsAvailable() const = 0; | |
| 96 virtual int EnableBuiltInAEC(bool enable) = 0; | |
| 97 virtual bool BuiltInAGCIsAvailable() const = 0; | |
| 98 virtual int EnableBuiltInAGC(bool enable) = 0; | |
| 99 virtual bool BuiltInNSIsAvailable() const = 0; | |
| 100 virtual int EnableBuiltInNS(bool enable) = 0; | |
| 101 | |
| 102 protected: | |
| 103 VoEHardware() {} | |
| 104 virtual ~VoEHardware() {} | |
| 105 }; | |
| 106 | |
| 107 } // namespace webrtc | |
| 108 | |
| 109 #endif // WEBRTC_VOICE_ENGINE_VOE_HARDWARE_H | |
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