276 lines
10 KiB
C
276 lines
10 KiB
C
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/*-========================================================================-_
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| - XACT3D3 - |
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| Copyright (c) Microsoft Corporation. All rights reserved. |
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|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
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|VERSION: 0.1 MODEL: Unmanaged User-mode |
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|CONTRACT: N / A EXCEPT: No Exceptions |
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|PARENT: N / A MINREQ: Win2000, Xbox360 |
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|PROJECT: XACT3D DIALECT: MS Visual C++ 7.0 |
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|>------------------------------------------------------------------------<|
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| DUTY: XACT 3D support |
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^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
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NOTES:
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1. See X3DAudio.h for information regarding X3DAudio types. */
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#ifndef __XACT3D3_H__
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#define __XACT3D3_H__
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//--------------<D-E-F-I-N-I-T-I-O-N-S>-------------------------------------//
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#include <x3daudio.h>
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#include <xact3.h>
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#pragma warning(push)
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#pragma warning(disable: 4701) // disable "local variable may be used without having been initialized" compile warning
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// Supported speaker positions, represented as azimuth angles.
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//
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// Here's a picture of the azimuth angles for the 8 cardinal points,
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// seen from above. The emitter's base position is at the origin 0.
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//
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// FRONT
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// | 0 <-- azimuth
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// |
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// 7pi/4 \ | / pi/4
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// \ | /
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// LEFT \|/ RIGHT
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// 3pi/2-------0-------pi/2
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// /|\
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// / | \
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// 5pi/4 / | \ 3pi/4
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// |
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// | pi
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// BACK
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//
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#define LEFT_AZIMUTH (3*X3DAUDIO_PI/2)
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#define RIGHT_AZIMUTH (X3DAUDIO_PI/2)
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#define FRONT_LEFT_AZIMUTH (7*X3DAUDIO_PI/4)
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#define FRONT_RIGHT_AZIMUTH (X3DAUDIO_PI/4)
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#define FRONT_CENTER_AZIMUTH 0.0f
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#define LOW_FREQUENCY_AZIMUTH X3DAUDIO_2PI
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#define BACK_LEFT_AZIMUTH (5*X3DAUDIO_PI/4)
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#define BACK_RIGHT_AZIMUTH (3*X3DAUDIO_PI/4)
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#define BACK_CENTER_AZIMUTH X3DAUDIO_PI
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#define FRONT_LEFT_OF_CENTER_AZIMUTH (15*X3DAUDIO_PI/8)
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#define FRONT_RIGHT_OF_CENTER_AZIMUTH (X3DAUDIO_PI/8)
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//--------------<D-A-T-A---T-Y-P-E-S>---------------------------------------//
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// Supported emitter channel layouts:
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static const float aStereoLayout[] =
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{
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LEFT_AZIMUTH,
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RIGHT_AZIMUTH
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};
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static const float a2Point1Layout[] =
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{
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LEFT_AZIMUTH,
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RIGHT_AZIMUTH,
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LOW_FREQUENCY_AZIMUTH
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};
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static const float aQuadLayout[] =
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{
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FRONT_LEFT_AZIMUTH,
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FRONT_RIGHT_AZIMUTH,
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BACK_LEFT_AZIMUTH,
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BACK_RIGHT_AZIMUTH
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};
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static const float a4Point1Layout[] =
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{
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FRONT_LEFT_AZIMUTH,
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FRONT_RIGHT_AZIMUTH,
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LOW_FREQUENCY_AZIMUTH,
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BACK_LEFT_AZIMUTH,
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BACK_RIGHT_AZIMUTH
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};
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static const float a5Point1Layout[] =
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{
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FRONT_LEFT_AZIMUTH,
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FRONT_RIGHT_AZIMUTH,
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FRONT_CENTER_AZIMUTH,
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LOW_FREQUENCY_AZIMUTH,
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BACK_LEFT_AZIMUTH,
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BACK_RIGHT_AZIMUTH
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};
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static const float a7Point1Layout[] =
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{
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FRONT_LEFT_AZIMUTH,
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FRONT_RIGHT_AZIMUTH,
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FRONT_CENTER_AZIMUTH,
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LOW_FREQUENCY_AZIMUTH,
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BACK_LEFT_AZIMUTH,
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BACK_RIGHT_AZIMUTH,
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LEFT_AZIMUTH,
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RIGHT_AZIMUTH
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};
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//--------------<F-U-N-C-T-I-O-N-S>-----------------------------------------//
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////
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// DESCRIPTION:
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// Initializes the 3D API's:
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//
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// REMARKS:
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// This method only needs to be called once.
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// X3DAudio will be initialized such that its speaker channel mask
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// matches the format of the given XACT engine's final mix.
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//
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// PARAMETERS:
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// pEngine - [in] XACT engine
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// X3DInstance - [out] X3DAudio instance handle
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//
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// RETURN VALUE:
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// HResult error code
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////
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EXTERN_C HRESULT inline XACT3DInitialize (__in IXACT3Engine* pEngine, __in X3DAUDIO_HANDLE X3DInstance)
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{
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HRESULT hr = S_OK;
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if (pEngine == NULL) {
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hr = E_POINTER;
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}
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XACTVARIABLEVALUE nSpeedOfSound;
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if (SUCCEEDED(hr)) {
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XACTVARIABLEINDEX xactSpeedOfSoundID = pEngine->GetGlobalVariableIndex("SpeedOfSound");
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hr = pEngine->GetGlobalVariable(xactSpeedOfSoundID, &nSpeedOfSound);
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}
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if (SUCCEEDED(hr)) {
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WAVEFORMATEXTENSIBLE wfxFinalMixFormat;
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hr = pEngine->GetFinalMixFormat(&wfxFinalMixFormat);
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if (SUCCEEDED(hr)) {
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X3DAudioInitialize(wfxFinalMixFormat.dwChannelMask, nSpeedOfSound, X3DInstance);
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}
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}
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return hr;
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}
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////
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// DESCRIPTION:
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// Calculates DSP settings with respect to 3D parameters:
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//
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// REMARKS:
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// Note the following flags are always specified for XACT3D calculation:
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// X3DAUDIO_CALCULATE_MATRIX | X3DAUDIO_CALCULATE_DOPPLER | X3DAUDIO_CALCULATE_EMITTER_ANGLE
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//
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// This means the caller must set at least the following fields:
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// X3DAUDIO_LISTENER.OrientFront
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// X3DAUDIO_LISTENER.OrientTop
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// X3DAUDIO_LISTENER.Position
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// X3DAUDIO_LISTENER.Velocity
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//
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// X3DAUDIO_EMITTER.OrientFront
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// X3DAUDIO_EMITTER.OrientTop, if emitter is multi-channel
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// X3DAUDIO_EMITTER.Position
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// X3DAUDIO_EMITTER.Velocity
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// X3DAUDIO_EMITTER.InnerRadius
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// X3DAUDIO_EMITTER.InnerRadiusAngle
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// X3DAUDIO_EMITTER.ChannelCount
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// X3DAUDIO_EMITTER.CurveDistanceScaler
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// X3DAUDIO_EMITTER.DopplerScaler
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//
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// X3DAUDIO_DSP_SETTINGS.pMatrixCoefficients, the caller need only allocate space for SrcChannelCount*DstChannelCount elements
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// X3DAUDIO_DSP_SETTINGS.SrcChannelCount
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// X3DAUDIO_DSP_SETTINGS.DstChannelCount
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//
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// If X3DAUDIO_EMITTER.pChannelAzimuths is left NULL for multi-channel emitters,
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// a default channel radius and channel azimuth array will be applied below.
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// Distance curves such as X3DAUDIO_EMITTER.pVolumeCurve should be
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// left NULL as XACT's native RPCs will be used to define DSP behaviour
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// with respect to normalized distance.
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//
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// See X3DAudio.h for information regarding X3DAudio types.
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//
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// PARAMETERS:
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// X3DInstance - [in] X3DAudio instance handle, returned from XACT3DInitialize()
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// pListener - [in] point of 3D audio reception
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// pEmitter - [in] 3D audio source
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// pDSPSettings - [out] receives calculation results, applied to an XACT cue via XACT3DApply()
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//
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// RETURN VALUE:
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// HResult error code
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////
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EXTERN_C HRESULT inline XACT3DCalculate (__in X3DAUDIO_HANDLE X3DInstance, __in const X3DAUDIO_LISTENER* pListener, __inout X3DAUDIO_EMITTER* pEmitter, __inout X3DAUDIO_DSP_SETTINGS* pDSPSettings)
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{
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HRESULT hr = S_OK;
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if (pListener == NULL || pEmitter == NULL || pDSPSettings == NULL) {
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hr = E_POINTER;
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}
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if (SUCCEEDED(hr)) {
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if (pEmitter->ChannelCount > 1 && pEmitter->pChannelAzimuths == NULL) {
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pEmitter->ChannelRadius = 1.0f;
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switch (pEmitter->ChannelCount) {
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case 2: pEmitter->pChannelAzimuths = (float*)&aStereoLayout[0]; break;
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case 3: pEmitter->pChannelAzimuths = (float*)&a2Point1Layout[0]; break;
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case 4: pEmitter->pChannelAzimuths = (float*)&aQuadLayout[0]; break;
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case 5: pEmitter->pChannelAzimuths = (float*)&a4Point1Layout[0]; break;
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case 6: pEmitter->pChannelAzimuths = (float*)&a5Point1Layout[0]; break;
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case 8: pEmitter->pChannelAzimuths = (float*)&a7Point1Layout[0]; break;
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default: hr = E_FAIL; break;
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}
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}
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}
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if (SUCCEEDED(hr)) {
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static X3DAUDIO_DISTANCE_CURVE_POINT DefaultCurvePoints[2] = { 0.0f, 1.0f, 1.0f, 1.0f };
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static X3DAUDIO_DISTANCE_CURVE DefaultCurve = { (X3DAUDIO_DISTANCE_CURVE_POINT*)&DefaultCurvePoints[0], 2 };
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if (pEmitter->pVolumeCurve == NULL) {
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pEmitter->pVolumeCurve = &DefaultCurve;
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}
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if (pEmitter->pLFECurve == NULL) {
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pEmitter->pLFECurve = &DefaultCurve;
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}
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X3DAudioCalculate(X3DInstance, pListener, pEmitter, (X3DAUDIO_CALCULATE_MATRIX | X3DAUDIO_CALCULATE_DOPPLER | X3DAUDIO_CALCULATE_EMITTER_ANGLE), pDSPSettings);
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}
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return hr;
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}
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////
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// DESCRIPTION:
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// Applies results from a call to XACT3DCalculate() to a cue.
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//
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// PARAMETERS:
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// pDSPSettings - [in] calculation results generated by XACT3DCalculate()
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// pCue - [in] cue to which to apply pDSPSettings
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//
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// RETURN VALUE:
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// HResult error code
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////
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EXTERN_C HRESULT inline XACT3DApply (__in const X3DAUDIO_DSP_SETTINGS* pDSPSettings, __in IXACT3Cue* pCue)
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{
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HRESULT hr = S_OK;
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if (pDSPSettings == NULL || pCue == NULL) {
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hr = E_POINTER;
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}
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if (SUCCEEDED(hr)) {
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hr = pCue->SetMatrixCoefficients(pDSPSettings->SrcChannelCount, pDSPSettings->DstChannelCount, pDSPSettings->pMatrixCoefficients);
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}
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if (SUCCEEDED(hr)) {
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XACTVARIABLEINDEX xactDistanceID = pCue->GetVariableIndex("Distance");
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hr = pCue->SetVariable(xactDistanceID, pDSPSettings->EmitterToListenerDistance);
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}
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if (SUCCEEDED(hr)) {
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XACTVARIABLEINDEX xactDopplerID = pCue->GetVariableIndex("DopplerPitchScalar");
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hr = pCue->SetVariable(xactDopplerID, pDSPSettings->DopplerFactor);
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}
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if (SUCCEEDED(hr)) {
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XACTVARIABLEINDEX xactOrientationID = pCue->GetVariableIndex("OrientationAngle");
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hr = pCue->SetVariable(xactOrientationID, pDSPSettings->EmitterToListenerAngle * (180.0f / X3DAUDIO_PI));
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}
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return hr;
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}
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#pragma warning(pop)
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#endif // __XACT3D3_H__
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//---------------------------------<-EOF->----------------------------------//
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