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_WIN_H
12#define WEBRTC_AUDIO_DEVICE_AUDIO_MIXER_MANAGER_WIN_H
13
14#include "webrtc/typedefs.h"
15#include "webrtc/modules/audio_device/include/audio_device.h"
16#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
17#include <Windows.h>
18#include <mmsystem.h>
19
20namespace webrtc {
21
22class AudioMixerManager
23{
24public:
25    enum { MAX_NUMBER_MIXER_DEVICES = 40 };
26    enum { MAX_NUMBER_OF_LINE_CONTROLS = 20 };
27    enum { MAX_NUMBER_OF_MULTIPLE_ITEMS = 20 };
28    struct SpeakerLineInfo
29    {
30        DWORD dwLineID;
31        bool  speakerIsValid;
32        DWORD dwVolumeControlID;
33        bool  volumeControlIsValid;
34        DWORD dwMuteControlID;
35        bool  muteControlIsValid;
36    };
37    struct MicrophoneLineInfo
38    {
39        DWORD dwLineID;
40        bool  microphoneIsValid;
41        DWORD dwVolumeControlID;
42        bool  volumeControlIsValid;
43        DWORD dwMuteControlID;
44        bool  muteControlIsValid;
45        DWORD dwOnOffControlID;
46        bool  onOffControlIsValid;
47    };
48public:
49    int32_t EnumerateAll();
50    int32_t EnumerateSpeakers();
51    int32_t EnumerateMicrophones();
52    int32_t OpenSpeaker(AudioDeviceModule::WindowsDeviceType device);
53    int32_t OpenSpeaker(uint16_t index);
54    int32_t OpenMicrophone(AudioDeviceModule::WindowsDeviceType device);
55    int32_t OpenMicrophone(uint16_t index);
56    int32_t SetSpeakerVolume(uint32_t volume);
57    int32_t SpeakerVolume(uint32_t& volume) const;
58    int32_t MaxSpeakerVolume(uint32_t& maxVolume) const;
59    int32_t MinSpeakerVolume(uint32_t& minVolume) const;
60    int32_t SpeakerVolumeStepSize(uint16_t& stepSize) const;
61    int32_t SpeakerVolumeIsAvailable(bool& available);
62    int32_t SpeakerMuteIsAvailable(bool& available);
63    int32_t SetSpeakerMute(bool enable);
64    int32_t SpeakerMute(bool& enabled) const;
65    int32_t MicrophoneMuteIsAvailable(bool& available);
66    int32_t SetMicrophoneMute(bool enable);
67    int32_t MicrophoneMute(bool& enabled) const;
68    int32_t MicrophoneBoostIsAvailable(bool& available);
69    int32_t SetMicrophoneBoost(bool enable);
70    int32_t MicrophoneBoost(bool& enabled) const;
71    int32_t MicrophoneVolumeIsAvailable(bool& available);
72    int32_t SetMicrophoneVolume(uint32_t volume);
73    int32_t MicrophoneVolume(uint32_t& volume) const;
74    int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const;
75    int32_t MinMicrophoneVolume(uint32_t& minVolume) const;
76    int32_t MicrophoneVolumeStepSize(uint16_t& stepSize) const;
77    int32_t Close();
78    int32_t CloseSpeaker();
79    int32_t CloseMicrophone();
80    bool SpeakerIsInitialized() const;
81    bool MicrophoneIsInitialized() const;
82    UINT Devices() const;
83
84private:
85    UINT DestinationLines(UINT mixId) const;
86    UINT SourceLines(UINT mixId, DWORD destId) const;
87    bool GetCapabilities(UINT mixId, MIXERCAPS& caps, bool trace = false) const;
88    bool GetDestinationLineInfo(UINT mixId, DWORD destId, MIXERLINE& line, bool trace = false) const;
89    bool GetSourceLineInfo(UINT mixId, DWORD destId, DWORD srcId, MIXERLINE& line, bool trace = false) const;
90
91    bool GetAllLineControls(UINT mixId, const MIXERLINE& line, MIXERCONTROL* controlArray, bool trace = false) const;
92    bool GetLineControl(UINT mixId, DWORD dwControlID, MIXERCONTROL& control) const;
93    bool GetControlDetails(UINT mixId, MIXERCONTROL& controlArray, bool trace = false) const;
94    bool GetUnsignedControlValue(UINT mixId, DWORD dwControlID, DWORD& dwValue) const;
95    bool SetUnsignedControlValue(UINT mixId, DWORD dwControlID, DWORD dwValue) const;
96    bool SetBooleanControlValue(UINT mixId, DWORD dwControlID, bool value) const;
97    bool GetBooleanControlValue(UINT mixId, DWORD dwControlID, bool& value) const;
98    bool GetSelectedMuxSource(UINT mixId, DWORD dwControlID, DWORD cMultipleItems, UINT& index) const;
99
100private:
101    void ClearSpeakerState();
102    void ClearSpeakerState(UINT idx);
103    void ClearMicrophoneState();
104    void ClearMicrophoneState(UINT idx);
105    bool SpeakerIsValid(UINT idx) const;
106    UINT ValidSpeakers() const;
107    bool MicrophoneIsValid(UINT idx) const;
108    UINT ValidMicrophones() const;
109
110    void TraceStatusAndSupportFlags(DWORD fdwLine) const;
111    void TraceTargetType(DWORD dwType) const;
112    void TraceComponentType(DWORD dwComponentType) const;
113    void TraceControlType(DWORD dwControlType) const;
114    void TraceControlStatusAndSupportFlags(DWORD fdwControl) const;
115    void TraceWaveInError(MMRESULT error) const;
116    void TraceWaveOutError(MMRESULT error) const;
117    // Converts from wide-char to UTF-8 if UNICODE is defined.
118    // Does nothing if UNICODE is undefined.
119    char* WideToUTF8(const TCHAR* src) const;
120
121public:
122    AudioMixerManager(const int32_t id);
123    ~AudioMixerManager();
124
125private:
126    CriticalSectionWrapper& _critSect;
127    int32_t                 _id;
128    HMIXER                  _outputMixerHandle;
129    UINT                    _outputMixerID;
130    HMIXER                  _inputMixerHandle;
131    UINT                    _inputMixerID;
132    SpeakerLineInfo         _speakerState[MAX_NUMBER_MIXER_DEVICES];
133    MicrophoneLineInfo      _microphoneState[MAX_NUMBER_MIXER_DEVICES];
134    mutable char            _str[MAXERRORLENGTH];
135};
136
137}  // namespace webrtc
138
139#endif  // WEBRTC_AUDIO_DEVICE_AUDIO_MIXER_MANAGER_H
140