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 #ifndef AUDIO_DEVICE_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_ 12 #define AUDIO_DEVICE_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_ 13 14 #include "modules/audio_device/include/audio_device.h" 15 #include "modules/audio_device/linux/alsasymboltable_linux.h" 16 #include "rtc_base/criticalsection.h" 17 #include "typedefs.h" // NOLINT(build/include) 18 19 #include <alsa/asoundlib.h> 20 21 namespace webrtc 22 { 23 24 class AudioMixerManagerLinuxALSA 25 { 26 public: 27 int32_t OpenSpeaker(char* deviceName); 28 int32_t OpenMicrophone(char* deviceName); 29 int32_t SetSpeakerVolume(uint32_t volume); 30 int32_t SpeakerVolume(uint32_t& volume) const; 31 int32_t MaxSpeakerVolume(uint32_t& maxVolume) const; 32 int32_t MinSpeakerVolume(uint32_t& minVolume) const; 33 int32_t SpeakerVolumeIsAvailable(bool& available); 34 int32_t SpeakerMuteIsAvailable(bool& available); 35 int32_t SetSpeakerMute(bool enable); 36 int32_t SpeakerMute(bool& enabled) const; 37 int32_t MicrophoneMuteIsAvailable(bool& available); 38 int32_t SetMicrophoneMute(bool enable); 39 int32_t MicrophoneMute(bool& enabled) const; 40 int32_t MicrophoneVolumeIsAvailable(bool& available); 41 int32_t SetMicrophoneVolume(uint32_t volume); 42 int32_t MicrophoneVolume(uint32_t& volume) const; 43 int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const; 44 int32_t MinMicrophoneVolume(uint32_t& minVolume) const; 45 int32_t Close(); 46 int32_t CloseSpeaker(); 47 int32_t CloseMicrophone(); 48 bool SpeakerIsInitialized() const; 49 bool MicrophoneIsInitialized() const; 50 51 public: 52 AudioMixerManagerLinuxALSA(); 53 ~AudioMixerManagerLinuxALSA(); 54 55 private: 56 int32_t LoadMicMixerElement() const; 57 int32_t LoadSpeakerMixerElement() const; 58 void GetControlName(char *controlName, char* deviceName) const; 59 60 private: 61 rtc::CriticalSection _critSect; 62 mutable snd_mixer_t* _outputMixerHandle; 63 char _outputMixerStr[kAdmMaxDeviceNameSize]; 64 mutable snd_mixer_t* _inputMixerHandle; 65 char _inputMixerStr[kAdmMaxDeviceNameSize]; 66 mutable snd_mixer_elem_t* _outputMixerElement; 67 mutable snd_mixer_elem_t* _inputMixerElement; 68 }; 69 70 } 71 72 #endif // MODULES_AUDIO_DEVICE_MAIN_SOURCE_LINUX_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_ 73