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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 #ifndef WEBRTC_AUDIO_DEVICE_AUDIO_MIXER_MANAGER_ALSA_LINUX_H
     12 #define WEBRTC_AUDIO_DEVICE_AUDIO_MIXER_MANAGER_ALSA_LINUX_H
     13 
     14 #include "webrtc/modules/audio_device/include/audio_device.h"
     15 #include "webrtc/modules/audio_device/linux/alsasymboltable_linux.h"
     16 #include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
     17 #include "webrtc/typedefs.h"
     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 SpeakerVolumeStepSize(uint16_t& stepSize) const;
     34     int32_t SpeakerVolumeIsAvailable(bool& available);
     35     int32_t SpeakerMuteIsAvailable(bool& available);
     36     int32_t SetSpeakerMute(bool enable);
     37     int32_t SpeakerMute(bool& enabled) const;
     38     int32_t MicrophoneMuteIsAvailable(bool& available);
     39     int32_t SetMicrophoneMute(bool enable);
     40     int32_t MicrophoneMute(bool& enabled) const;
     41     int32_t MicrophoneBoostIsAvailable(bool& available);
     42     int32_t SetMicrophoneBoost(bool enable);
     43     int32_t MicrophoneBoost(bool& enabled) const;
     44     int32_t MicrophoneVolumeIsAvailable(bool& available);
     45     int32_t SetMicrophoneVolume(uint32_t volume);
     46     int32_t MicrophoneVolume(uint32_t& volume) const;
     47     int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const;
     48     int32_t MinMicrophoneVolume(uint32_t& minVolume) const;
     49     int32_t MicrophoneVolumeStepSize(uint16_t& stepSize) const;
     50     int32_t Close();
     51     int32_t CloseSpeaker();
     52     int32_t CloseMicrophone();
     53     bool SpeakerIsInitialized() const;
     54     bool MicrophoneIsInitialized() const;
     55 
     56 public:
     57     AudioMixerManagerLinuxALSA(const int32_t id);
     58     ~AudioMixerManagerLinuxALSA();
     59 
     60 private:
     61     int32_t LoadMicMixerElement() const;
     62     int32_t LoadSpeakerMixerElement() const;
     63     void GetControlName(char *controlName, char* deviceName) const;
     64 
     65 private:
     66     CriticalSectionWrapper& _critSect;
     67     int32_t _id;
     68     mutable snd_mixer_t* _outputMixerHandle;
     69     char _outputMixerStr[kAdmMaxDeviceNameSize];
     70     mutable snd_mixer_t* _inputMixerHandle;
     71     char _inputMixerStr[kAdmMaxDeviceNameSize];
     72     mutable snd_mixer_elem_t* _outputMixerElement;
     73     mutable snd_mixer_elem_t* _inputMixerElement;
     74 };
     75 
     76 }
     77 
     78 #endif  // MODULES_AUDIO_DEVICE_MAIN_SOURCE_LINUX_AUDIO_MIXER_MANAGER_ALSA_LINUX_H_
     79