|  | /* | 
|  | * Copyright (c) 2015 Mark Harmstone | 
|  | * | 
|  | * This library is free software; you can redistribute it and/or | 
|  | * modify it under the terms of the GNU Lesser General Public | 
|  | * License as published by the Free Software Foundation; either | 
|  | * version 2.1 of the License, or (at your option) any later version. | 
|  | * | 
|  | * This library is distributed in the hope that it will be useful, | 
|  | * but WITHOUT ANY WARRANTY; without even the implied warranty of | 
|  | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
|  | * Lesser General Public License for more details. | 
|  | * | 
|  | * You should have received a copy of the GNU Lesser General Public | 
|  | * License along with this library; if not, write to the Free Software | 
|  | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA | 
|  | */ | 
|  |  | 
|  | #ifndef XAUDIO2_VER | 
|  | #define XAUDIO2_VER 9 | 
|  | #endif | 
|  |  | 
|  | import "unknwn.idl"; | 
|  | import "mmdeviceapi.idl"; | 
|  |  | 
|  | import "audiosessiontypes.h"; | 
|  | import "mmreg.h"; | 
|  |  | 
|  | #pragma pack(push,1) | 
|  |  | 
|  | #if XAUDIO2_VER <= 7 | 
|  |  | 
|  | [ | 
|  | threading(both), | 
|  | #if XAUDIO2_VER == 0 | 
|  | uuid(fac23f48-31f5-45a8-b49b-5225d61401aa) | 
|  | #elif XAUDIO2_VER == 1 | 
|  | uuid(e21a7345-eb21-468e-be50-804db97cf708) | 
|  | #elif XAUDIO2_VER == 2 | 
|  | uuid(b802058a-464a-42db-bc10-b650d6f2586a) | 
|  | #elif XAUDIO2_VER == 3 | 
|  | uuid(4c5e637a-16c7-4de3-9c46-5ed22181962d) | 
|  | #elif XAUDIO2_VER == 4 | 
|  | uuid(03219e78-5bc3-44d1-b92e-f63d89cc6526) | 
|  | #elif XAUDIO2_VER == 5 | 
|  | uuid(4c9b6dde-6809-46e6-a278-9b6a97588670) | 
|  | #elif XAUDIO2_VER == 6 | 
|  | uuid(3eda9b49-2085-498b-9bb2-39a6778493de) | 
|  | #else | 
|  | uuid(5a508685-a254-4fba-9b82-9a24b00306af) | 
|  | #endif | 
|  | ] | 
|  | coclass XAudio2 { | 
|  | interface IUnknown; | 
|  | } | 
|  |  | 
|  | [ | 
|  | #if XAUDIO2_VER == 0 | 
|  | uuid(fac23f48-31f5-45a8-b49b-5225d61401db) | 
|  | #elif XAUDIO2_VER == 1 | 
|  | uuid(f7a76c21-53d4-46bb-ac53-8b459cae46bd) | 
|  | #elif XAUDIO2_VER == 2 | 
|  | uuid(97dfb7e7-5161-4015-87a9-c79e6a1952cc) | 
|  | #elif XAUDIO2_VER == 3 | 
|  | uuid(ef0aa05d-8075-4e5d-bead-45be0c3ccbb3) | 
|  | #elif XAUDIO2_VER == 4 | 
|  | uuid(4256535c-1ea4-4d4b-8ad5-f9db762eca9e) | 
|  | #elif XAUDIO2_VER == 5 | 
|  | uuid(715bdd1a-aa82-436b-b0fa-6acea39bd0a1) | 
|  | #elif XAUDIO2_VER == 6 | 
|  | uuid(47199894-7cc2-444d-9873-ced2562cc60e) | 
|  | #else | 
|  | uuid(db05ea35-0329-4d4b-a53a-6dead03d3852) | 
|  | #endif | 
|  | ] | 
|  | coclass XAudio2Debug { | 
|  | interface IUnknown; | 
|  | } | 
|  |  | 
|  | #endif | 
|  |  | 
|  | interface IXAudio2Voice; | 
|  |  | 
|  | typedef enum XAUDIO2_WINDOWS_PROCESSOR_SPECIFIER | 
|  | { | 
|  | Processor1  = 0x00000001, | 
|  | Processor2  = 0x00000002, | 
|  | Processor3  = 0x00000004, | 
|  | Processor4  = 0x00000008, | 
|  | Processor5  = 0x00000010, | 
|  | Processor6  = 0x00000020, | 
|  | Processor7  = 0x00000040, | 
|  | Processor8  = 0x00000080, | 
|  | Processor9  = 0x00000100, | 
|  | Processor10 = 0x00000200, | 
|  | Processor11 = 0x00000400, | 
|  | Processor12 = 0x00000800, | 
|  | Processor13 = 0x00001000, | 
|  | Processor14 = 0x00002000, | 
|  | Processor15 = 0x00004000, | 
|  | Processor16 = 0x00008000, | 
|  | Processor17 = 0x00010000, | 
|  | Processor18 = 0x00020000, | 
|  | Processor19 = 0x00040000, | 
|  | Processor20 = 0x00080000, | 
|  | Processor21 = 0x00100000, | 
|  | Processor22 = 0x00200000, | 
|  | Processor23 = 0x00400000, | 
|  | Processor24 = 0x00800000, | 
|  | Processor25 = 0x01000000, | 
|  | Processor26 = 0x02000000, | 
|  | Processor27 = 0x04000000, | 
|  | Processor28 = 0x08000000, | 
|  | Processor29 = 0x10000000, | 
|  | Processor30 = 0x20000000, | 
|  | Processor31 = 0x40000000, | 
|  | Processor32 = 0x80000000, | 
|  | XAUDIO2_ANY_PROCESSOR = 0xffffffff, | 
|  | XAUDIO2_DEFAULT_PROCESSOR = XAUDIO2_ANY_PROCESSOR | 
|  | } XAUDIO2_WINDOWS_PROCESSOR_SPECIFIER, XAUDIO2_PROCESSOR; | 
|  |  | 
|  | typedef struct XAUDIO2_PERFORMANCE_DATA | 
|  | { | 
|  | UINT64 AudioCyclesSinceLastQuery; | 
|  | UINT64 TotalCyclesSinceLastQuery; | 
|  | UINT32 MinimumCyclesPerQuantum; | 
|  | UINT32 MaximumCyclesPerQuantum; | 
|  | UINT32 MemoryUsageInBytes; | 
|  | UINT32 CurrentLatencyInSamples; | 
|  | #if XAUDIO2_VER == 0 | 
|  | UINT32 GlitchesSinceLastQuery; | 
|  | #else | 
|  | UINT32 GlitchesSinceEngineStarted; | 
|  | #endif | 
|  | UINT32 ActiveSourceVoiceCount; | 
|  | UINT32 TotalSourceVoiceCount; | 
|  | UINT32 ActiveSubmixVoiceCount; | 
|  | #if XAUDIO2_VER <= 2 | 
|  | UINT32 TotalSubmixVoiceCount; | 
|  | #else | 
|  | UINT32 ActiveResamplerCount; | 
|  | UINT32 ActiveMatrixMixCount; | 
|  | #endif | 
|  | UINT32 ActiveXmaSourceVoices; | 
|  | UINT32 ActiveXmaStreams; | 
|  | } XAUDIO2_PERFORMANCE_DATA; | 
|  |  | 
|  | typedef enum XAUDIO2_DEVICE_ROLE | 
|  | { | 
|  | NotDefaultDevice            = 0x0, | 
|  | DefaultConsoleDevice        = 0x1, | 
|  | DefaultMultimediaDevice     = 0x2, | 
|  | DefaultCommunicationsDevice = 0x4, | 
|  | DefaultGameDevice           = 0x8, | 
|  | GlobalDefaultDevice         = 0xf, | 
|  | InvalidDeviceRole = ~GlobalDefaultDevice | 
|  | } XAUDIO2_DEVICE_ROLE; | 
|  |  | 
|  | #if XAUDIO2_VER <= 7 | 
|  | typedef struct XAUDIO2_DEVICE_DETAILS | 
|  | { | 
|  | WCHAR DeviceID[256]; | 
|  | WCHAR DisplayName[256]; | 
|  | XAUDIO2_DEVICE_ROLE Role; | 
|  | WAVEFORMATEXTENSIBLE OutputFormat; | 
|  | } XAUDIO2_DEVICE_DETAILS; | 
|  | #endif | 
|  |  | 
|  | typedef struct XAUDIO2_VOICE_DETAILS | 
|  | { | 
|  | UINT32 CreationFlags; | 
|  | #if XAUDIO2_VER >= 8 | 
|  | UINT32 ActiveFlags; | 
|  | #endif | 
|  | UINT32 InputChannels; | 
|  | UINT32 InputSampleRate; | 
|  | } XAUDIO2_VOICE_DETAILS; | 
|  |  | 
|  | #if XAUDIO2_VER <= 3 | 
|  | typedef struct XAUDIO2_VOICE_SENDS | 
|  | { | 
|  | UINT32 OutputCount; | 
|  | IXAudio2Voice **pOutputVoices; | 
|  | } XAUDIO2_VOICE_SENDS; | 
|  | #else | 
|  | typedef struct XAUDIO2_SEND_DESCRIPTOR | 
|  | { | 
|  | UINT32 Flags; | 
|  | IXAudio2Voice* pOutputVoice; | 
|  | } XAUDIO2_SEND_DESCRIPTOR; | 
|  |  | 
|  | typedef struct XAUDIO2_VOICE_SENDS | 
|  | { | 
|  | UINT32 SendCount; | 
|  | XAUDIO2_SEND_DESCRIPTOR* pSends; | 
|  | } XAUDIO2_VOICE_SENDS; | 
|  | #endif | 
|  |  | 
|  | typedef struct XAUDIO2_EFFECT_DESCRIPTOR | 
|  | { | 
|  | IUnknown* pEffect; | 
|  | BOOL InitialState; | 
|  | UINT32 OutputChannels; | 
|  | } XAUDIO2_EFFECT_DESCRIPTOR; | 
|  |  | 
|  | typedef struct XAUDIO2_EFFECT_CHAIN | 
|  | { | 
|  | UINT32 EffectCount; | 
|  | XAUDIO2_EFFECT_DESCRIPTOR* pEffectDescriptors; | 
|  | } XAUDIO2_EFFECT_CHAIN; | 
|  |  | 
|  | const UINT32 XAUDIO2_MAX_BUFFER_BYTES = 0x80000000; | 
|  | const UINT32 XAUDIO2_MAX_QUEUED_BUFFERS = 64; | 
|  | const UINT32 XAUDIO2_MAX_BUFFERS_SYSTEM = 2; | 
|  | const UINT32 XAUDIO2_MAX_AUDIO_CHANNELS = 64; | 
|  | const UINT32 XAUDIO2_MIN_SAMPLE_RATE = 1000; | 
|  | const UINT32 XAUDIO2_MAX_SAMPLE_RATE = 200000; | 
|  | const float XAUDIO2_MAX_VOLUME_LEVEL = 16777216.0; | 
|  | const float XAUDIO2_MIN_FREQ_RATIO = (1/1024.0); | 
|  | const float XAUDIO2_MAX_FREQ_RATIO = 1024.0; | 
|  | const float XAUDIO2_DEFAULT_FREQ_RATIO = 2.0; | 
|  | const float XAUDIO2_MAX_FILTER_ONEOVERQ = 1.5; | 
|  | const float XAUDIO2_MAX_FILTER_FREQUENCY = 1.0; | 
|  | #if XAUDIO2_VER > 0 | 
|  | const UINT32 XAUDIO2_MAX_LOOP_COUNT = 254; | 
|  | #else | 
|  | const UINT32 XAUDIO2_MAX_LOOP_COUNT = 0x100000; | 
|  | #endif | 
|  |  | 
|  | const UINT32 XAUDIO2_COMMIT_NOW = 0; | 
|  | const UINT32 XAUDIO2_COMMIT_ALL = 0; | 
|  | const UINT32 XAUDIO2_INVALID_OPSET = 0xffffffff; | 
|  | const UINT32 XAUDIO2_NO_LOOP_REGION = 0; | 
|  | #if XAUDIO2_VER > 0 | 
|  | const UINT32 XAUDIO2_LOOP_INFINITE = 255; | 
|  | #else | 
|  | const UINT32 XAUDIO2_LOOP_INFINITE = ((UINT)-1); | 
|  | #endif | 
|  | const UINT32 XAUDIO2_DEFAULT_CHANNELS = 0; | 
|  | const UINT32 XAUDIO2_DEFAULT_SAMPLERATE = 0; | 
|  |  | 
|  | [ | 
|  | object, | 
|  | local | 
|  | ] | 
|  | interface IXAudio2EngineCallback | 
|  | { | 
|  | void OnProcessingPassStart(); | 
|  |  | 
|  | void OnProcessingPassEnd(); | 
|  |  | 
|  | void OnCriticalError([in] HRESULT Error); | 
|  | } | 
|  |  | 
|  | typedef enum XAUDIO2_FILTER_TYPE | 
|  | { | 
|  | LowPassFilter, | 
|  | BandPassFilter, | 
|  | HighPassFilter, | 
|  | NotchFilter | 
|  | } XAUDIO2_FILTER_TYPE; | 
|  |  | 
|  | typedef struct XAUDIO2_FILTER_PARAMETERS | 
|  | { | 
|  | XAUDIO2_FILTER_TYPE Type; | 
|  | float Frequency; | 
|  | float OneOverQ; | 
|  | } XAUDIO2_FILTER_PARAMETERS; | 
|  |  | 
|  | [ | 
|  | object, | 
|  | local | 
|  | ] | 
|  | interface IXAudio2Voice | 
|  | { | 
|  | void GetVoiceDetails([out] XAUDIO2_VOICE_DETAILS* pVoiceDetails); | 
|  |  | 
|  | HRESULT SetOutputVoices([in] const XAUDIO2_VOICE_SENDS* pSendList); | 
|  |  | 
|  | HRESULT SetEffectChain([in] const XAUDIO2_EFFECT_CHAIN* pEffectChain); | 
|  |  | 
|  | HRESULT EnableEffect( | 
|  | [in] UINT32 EffectIndex, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | HRESULT DisableEffect( | 
|  | [in] UINT32 EffectIndex, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | void GetEffectState( | 
|  | [in] UINT32 EffectIndex, | 
|  | [out] BOOL* pEnabled); | 
|  |  | 
|  | HRESULT SetEffectParameters( | 
|  | [in] UINT32 EffectIndex, | 
|  | [in] const void* pParameters, | 
|  | [in] UINT32 ParametersByteSize, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | HRESULT GetEffectParameters( | 
|  | [in] UINT32 EffectIndex, | 
|  | [out] void* pParameters, | 
|  | [in] UINT32 ParametersByteSize); | 
|  |  | 
|  | HRESULT SetFilterParameters( | 
|  | [in] const XAUDIO2_FILTER_PARAMETERS* pParameters, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | void GetFilterParameters([out] XAUDIO2_FILTER_PARAMETERS* pParameters); | 
|  |  | 
|  | #if XAUDIO2_VER >= 4 | 
|  | HRESULT SetOutputFilterParameters( | 
|  | [in] IXAudio2Voice* pDestinationVoice, | 
|  | [in] const XAUDIO2_FILTER_PARAMETERS* pParameters, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | void GetOutputFilterParameters( | 
|  | [in] IXAudio2Voice* pDestinationVoice, | 
|  | [out] XAUDIO2_FILTER_PARAMETERS* pParameters); | 
|  | #endif | 
|  |  | 
|  | HRESULT SetVolume( | 
|  | [in] float Volume, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | void GetVolume([out] float* pVolume); | 
|  |  | 
|  | HRESULT SetChannelVolumes( | 
|  | [in] UINT32 Channels, | 
|  | [in, size_is(Channels)] const float* pVolumes, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | void GetChannelVolumes( | 
|  | [in] UINT32 Channels, | 
|  | [out, size_is(Channels)] float* pVolumes); | 
|  |  | 
|  | HRESULT SetOutputMatrix( | 
|  | [in] IXAudio2Voice* pDestinationVoice, | 
|  | [in] UINT32 SourceChannels, | 
|  | [in] UINT32 DestinationChannels, | 
|  | [in, size_is(SourceChannels * DestinationChannels)] const float* pLevelMatrix, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | #if XAUDIO2_VER == 0 | 
|  | HRESULT | 
|  | #else | 
|  | void | 
|  | #endif | 
|  | GetOutputMatrix( | 
|  | [in] IXAudio2Voice* pDestinationVoice, | 
|  | [in] UINT32 SourceChannels, | 
|  | [in] UINT32 DestinationChannels, | 
|  | [out, size_is(SourceChannels * DestinationChannels)] float* pLevelMatrix); | 
|  |  | 
|  | void DestroyVoice(); | 
|  | } | 
|  |  | 
|  | typedef struct XAUDIO2_BUFFER | 
|  | { | 
|  | UINT32 Flags; | 
|  | UINT32 AudioBytes; | 
|  | const BYTE* pAudioData; | 
|  | UINT32 PlayBegin; | 
|  | UINT32 PlayLength; | 
|  | UINT32 LoopBegin; | 
|  | UINT32 LoopLength; | 
|  | UINT32 LoopCount; | 
|  | void* pContext; | 
|  | } XAUDIO2_BUFFER; | 
|  |  | 
|  | typedef struct XAUDIO2_BUFFER_WMA | 
|  | { | 
|  | const UINT32* pDecodedPacketCumulativeBytes; | 
|  | UINT32 PacketCount; | 
|  | } XAUDIO2_BUFFER_WMA; | 
|  |  | 
|  | typedef struct XAUDIO2_VOICE_STATE | 
|  | { | 
|  | void* pCurrentBufferContext; | 
|  | UINT32 BuffersQueued; | 
|  | UINT64 SamplesPlayed; | 
|  | } XAUDIO2_VOICE_STATE; | 
|  |  | 
|  | [ | 
|  | local | 
|  | ] | 
|  | interface IXAudio2SourceVoice : IXAudio2Voice | 
|  | { | 
|  | HRESULT Start( | 
|  | [in, defaultvalue(0)] UINT32 Flags, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | HRESULT Stop( | 
|  | [in, defaultvalue(0)] UINT32 Flags, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | HRESULT SubmitSourceBuffer( | 
|  | [in] const XAUDIO2_BUFFER* pBuffer, | 
|  | [in, defaultvalue(NULL)] const XAUDIO2_BUFFER_WMA* pBufferWMA); | 
|  |  | 
|  | HRESULT FlushSourceBuffers(); | 
|  |  | 
|  | HRESULT Discontinuity(); | 
|  |  | 
|  | HRESULT ExitLoop([in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | #if XAUDIO2_VER >= 8 | 
|  | void GetState([out] XAUDIO2_VOICE_STATE* pVoiceState, [in, defaultvalue(0)] UINT32 Flags); | 
|  | #else | 
|  | void GetState([out] XAUDIO2_VOICE_STATE* pVoiceState); | 
|  | #endif | 
|  |  | 
|  | HRESULT SetFrequencyRatio( | 
|  | [in] float Ratio, | 
|  | [in, defaultvalue(XAUDIO2_COMMIT_NOW)] UINT32 OperationSet); | 
|  |  | 
|  | void GetFrequencyRatio([out] float* pRatio); | 
|  |  | 
|  | #if XAUDIO2_VER >= 4 | 
|  | HRESULT SetSourceSampleRate([in] UINT32 NewSourceSampleRate); | 
|  | #endif | 
|  | } | 
|  |  | 
|  | [ | 
|  | local | 
|  | ] | 
|  | interface IXAudio2SubmixVoice : IXAudio2Voice | 
|  | { | 
|  | } | 
|  |  | 
|  | [ | 
|  | local | 
|  | ] | 
|  | interface IXAudio2MasteringVoice : IXAudio2Voice | 
|  | { | 
|  | #if XAUDIO2_VER >= 8 | 
|  | HRESULT GetChannelMask([out] DWORD *pChannelMask); | 
|  | #endif | 
|  | } | 
|  |  | 
|  | [ | 
|  | object, | 
|  | local | 
|  | ] | 
|  | interface IXAudio2VoiceCallback | 
|  | { | 
|  | #if XAUDIO2_VER > 0 | 
|  | void OnVoiceProcessingPassStart([in] UINT32 BytesRequired); | 
|  | #else | 
|  | void OnVoiceProcessingPassStart(); | 
|  | #endif | 
|  |  | 
|  | void OnVoiceProcessingPassEnd(); | 
|  |  | 
|  | void OnStreamEnd(); | 
|  |  | 
|  | void OnBufferStart([in] void* pBufferContext); | 
|  |  | 
|  | void OnBufferEnd([in] void* pBufferContext); | 
|  |  | 
|  | void OnLoopEnd([in] void* pBufferContext); | 
|  |  | 
|  | void OnVoiceError( | 
|  | [in] void* pBuffercontext, | 
|  | [in] HRESULT Error); | 
|  | } | 
|  |  | 
|  | typedef struct XAUDIO2_DEBUG_CONFIGURATION | 
|  | { | 
|  | UINT32 TraceMask; | 
|  | UINT32 BreakMask; | 
|  | BOOL LogThreadID; | 
|  | BOOL LogFileline; | 
|  | BOOL LogFunctionName; | 
|  | BOOL LogTiming; | 
|  | } XAUDIO2_DEBUG_CONFIGURATION; | 
|  |  | 
|  | [ | 
|  | object, | 
|  | #if XAUDIO2_VER <= 7 | 
|  | uuid(8bcf1f58-9fe7-4583-8ac6-e2adc465c8bb) | 
|  | #elif XAUDIO2_VER == 8 | 
|  | uuid(60d8dac8-5aa1-4e8e-b597-2f5e2883d484) | 
|  | #else | 
|  | uuid(2b02e3cf-2e0b-4ec3-be45-1b2a3fe7210d) | 
|  | #endif | 
|  | ] | 
|  | /* XAudio2 2.9's IXAudio2 interface. */ | 
|  | interface IXAudio2 : IUnknown | 
|  | { | 
|  | #if XAUDIO2_VER <= 7 | 
|  | HRESULT GetDeviceCount(UINT32 *count); | 
|  |  | 
|  | HRESULT GetDeviceDetails(UINT32 index, XAUDIO2_DEVICE_DETAILS *details); | 
|  |  | 
|  | HRESULT Initialize(UINT32 flags, XAUDIO2_PROCESSOR processor); | 
|  | #endif | 
|  |  | 
|  | HRESULT RegisterForCallbacks([in] IXAudio2EngineCallback* pCallback); | 
|  |  | 
|  | void UnregisterForCallbacks([in] IXAudio2EngineCallback* pCallback); | 
|  |  | 
|  | HRESULT CreateSourceVoice( | 
|  | [out] IXAudio2SourceVoice** ppSourceVoice, | 
|  | [in] const WAVEFORMATEX* pSourceFormat, | 
|  | [in, defaultvalue(0)] UINT32 Flags, | 
|  | [in, defaultvalue(XAUDIO2_DEFAULT_FREQ_RATIO)] float MaxFrequencyRatio, | 
|  | [in, defaultvalue(NULL)] IXAudio2VoiceCallback* pCallback, | 
|  | [in, defaultvalue(NULL)] const XAUDIO2_VOICE_SENDS* pSendList, | 
|  | [in, defaultvalue(NULL)] const XAUDIO2_EFFECT_CHAIN* pEffectChain); | 
|  |  | 
|  | HRESULT CreateSubmixVoice( | 
|  | [out] IXAudio2SubmixVoice** ppSubmixVoice, | 
|  | [in] UINT32 InputChannels, | 
|  | [in] UINT32 InputSampleRate, | 
|  | [in, defaultvalue(0)] UINT32 Flags, | 
|  | [in, defaultvalue(0)] UINT32 ProcessingStage, | 
|  | [in, defaultvalue(NULL)] const XAUDIO2_VOICE_SENDS* pSendList, | 
|  | [in, defaultvalue(NULL)] const XAUDIO2_EFFECT_CHAIN* pEffectChain); | 
|  |  | 
|  | HRESULT CreateMasteringVoice( | 
|  | [out] IXAudio2MasteringVoice** ppMasteringVoice, | 
|  | [in, defaultvalue(XAUDIO2_DEFAULT_CHANNELS)] UINT32 InputChannels, | 
|  | [in, defaultvalue(XAUDIO2_DEFAULT_SAMPLERATE)] UINT32 InputSampleRate, | 
|  | [in, defaultvalue(0)] UINT32 Flags, | 
|  | #if XAUDIO2_VER >= 8 | 
|  | [in, defaultvalue(NULL)] LPCWSTR DeviceId, | 
|  | #else | 
|  | [in, defaultvalue(0)] UINT32 index, | 
|  | #endif | 
|  | [in, defaultvalue(NULL)] const XAUDIO2_EFFECT_CHAIN* pEffectChain | 
|  | #if XAUDIO2_VER >= 8 | 
|  | , [in, defaultvalue(AudioCategory_GameEffects)] AUDIO_STREAM_CATEGORY category | 
|  | #endif | 
|  | ); | 
|  |  | 
|  | HRESULT StartEngine(); | 
|  |  | 
|  | void StopEngine(); | 
|  |  | 
|  | HRESULT CommitChanges([in] UINT32 OperationSet); | 
|  |  | 
|  | void GetPerformanceData([out] XAUDIO2_PERFORMANCE_DATA* pPerfData); | 
|  |  | 
|  | [local] void SetDebugConfiguration( | 
|  | [in] const XAUDIO2_DEBUG_CONFIGURATION* pDebugConfiguration, | 
|  | [in, defaultvalue(NULL)] void* pReserved); | 
|  | } | 
|  |  | 
|  | [ | 
|  | object, | 
|  | local, | 
|  | uuid(84ac29bb-d619-44d2-b197-e4acf7df3ed6) | 
|  | ] | 
|  | interface IXAudio2Extension : IUnknown | 
|  | { | 
|  | void GetProcessingQuantum(UINT32 *quantum_numerator, UINT32 *quantum_denominator); | 
|  |  | 
|  | void GetProcessor(XAUDIO2_PROCESSOR *processor); | 
|  | } | 
|  |  | 
|  | const UINT32 XAUDIO2_DEBUG_ENGINE           = 0x00000001; | 
|  | const UINT32 XAUDIO2_VOICE_NOPITCH          = 0x00000002; | 
|  | const UINT32 XAUDIO2_VOICE_NOSRC            = 0x00000004; | 
|  | const UINT32 XAUDIO2_VOICE_USEFILTER        = 0x00000008; | 
|  | const UINT32 XAUDIO2_VOICE_MUSIC            = 0x00000010; | 
|  | const UINT32 XAUDIO2_PLAY_TAILS             = 0x00000020; | 
|  | const UINT32 XAUDIO2_END_OF_STREAM          = 0x00000040; | 
|  | const UINT32 XAUDIO2_SEND_USEFILTER         = 0x00000080; | 
|  | const UINT32 XAUDIO2_VOICE_NOSAMPLESPLAYED  = 0x00000100; | 
|  |  | 
|  | const XAUDIO2_FILTER_TYPE XAUDIO2_DEFAULT_FILTER_TYPE = LowPassFilter; | 
|  | const float XAUDIO2_DEFAULT_FILTER_FREQUENCY = XAUDIO2_MAX_FILTER_FREQUENCY; | 
|  | const float XAUDIO2_DEFAULT_FILTER_ONEOVERQ = 1.0; | 
|  | const UINT32 XAUDIO2_QUANTUM_NUMERATOR = 1; | 
|  | const UINT32 XAUDIO2_QUANTUM_DENOMINATOR = 100; | 
|  | const float XAUDIO2_QUANTUM_MS = (1000.0 * XAUDIO2_QUANTUM_NUMERATOR / XAUDIO2_QUANTUM_DENOMINATOR); | 
|  |  | 
|  | /* use cpp_quote to retain the HRESULT type in header file */ | 
|  | #if XAUDIO2_VER > 0 | 
|  | cpp_quote("#define XAUDIO2_E_INVALID_CALL ((HRESULT)0x88960001)") | 
|  | cpp_quote("#define XAUDIO2_E_XMA_DECODER_ERROR ((HRESULT)0x88960002)") | 
|  | cpp_quote("#define XAUDIO2_E_XAPO_CREATION_FAILED ((HRESULT)0x88960003)") | 
|  | cpp_quote("#define XAUDIO2_E_DEVICE_INVALIDATED ((HRESULT)0x88960004)") | 
|  | #else | 
|  | cpp_quote("#define XAUDIO2_E_XMA_DECODER_ERROR ((HRESULT)0x88960001)") | 
|  | cpp_quote("#define XAUDIO2_E_XAPO_CREATION_FAILED ((HRESULT)0x88960002)") | 
|  | cpp_quote("#define XAUDIO2_E_DEVICE_INVALIDATED ((HRESULT)0x88960003)") | 
|  | #endif | 
|  |  | 
|  | cpp_quote("#ifdef XAUDIO2_HELPER_FUNCTIONS") | 
|  | cpp_quote("#define _USE_MATH_DEFINES") | 
|  | cpp_quote("#include <math.h>") | 
|  | cpp_quote("inline static float XAudio2DecibelsToAmplitudeRatio(float decibels) { return powf(10.0f, decibels/20.0f); }") | 
|  | cpp_quote("inline static float XAudio2AmplitudeRatioToDecibels(float volume) { if (volume == 0) { return -3.402823466e+38f; } return 20.0f * log10f(volume); }") | 
|  | cpp_quote("inline static float XAudio2SemitonesToFrequencyRatio(float semitones) { return powf(2.0f, semitones/12.0f); }") | 
|  | cpp_quote("inline static float XAudio2FrequencyRatioToSemitones(float freqratio) { return 39.86313713864835f * log10f(freqratio); }") | 
|  | cpp_quote("inline static float XAudio2CutoffFrequencyToRadians(float cutofffreq, UINT32 samplerate) { if ((UINT32)(cutofffreq * 6.0f) >= samplerate) { return XAUDIO2_MAX_FILTER_FREQUENCY; } return 2.0f * sinf((float)M_PI * cutofffreq / samplerate); }") | 
|  | cpp_quote("inline static float XAudio2RadiansToCutoffFrequency(float radians, float samplerate) { return samplerate * asinf(radians/2.0f) / (float)M_PI; }") | 
|  | cpp_quote("#endif") | 
|  |  | 
|  | #pragma pack(pop) | 
|  |  | 
|  | #if XAUDIO2_VER >= 8 | 
|  | cpp_quote("HRESULT WINAPI XAudio2Create(IXAudio2** pxaudio2, UINT32 flags, XAUDIO2_PROCESSOR processor);") | 
|  | #endif |