From 7f6844e48d32225eadd1e918fd0bbb84170a6b15 Mon Sep 17 00:00:00 2001 From: Chris Robinson Date: Tue, 20 Dec 2011 01:17:11 -0800 Subject: Use a struct to associate channel enums and their angles --- Alc/ALu.c | 101 +++++++++++++++++++++++++++++++------------------------------- 1 file changed, 51 insertions(+), 50 deletions(-) diff --git a/Alc/ALu.c b/Alc/ALu.c index c1388c4a..3c4dde88 100644 --- a/Alc/ALu.c +++ b/Alc/ALu.c @@ -37,6 +37,11 @@ #include "bs2b.h" +struct ChanMap { + enum Channel channel; + ALfloat angle; +}; + /* Cone scalar */ ALfloat ConeScale = 0.5f; @@ -58,32 +63,36 @@ static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat w,ALfloat matrix[ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) { - static const ALfloat angles_Mono[1] = { 0.0f }; - static const ALfloat angles_Stereo[2] = { -30.0f, 30.0f }; - static const ALfloat angles_Rear[2] = { -150.0f, 150.0f }; - static const ALfloat angles_Quad[4] = { -45.0f, 45.0f, -135.0f, 135.0f }; - static const ALfloat angles_X51[6] = { -30.0f, 30.0f, 0.0f, 0.0f, - -110.0f, 110.0f }; - static const ALfloat angles_X61[7] = { -30.0f, 30.0f, 0.0f, 0.0f, - 180.0f, -90.0f, 90.0f }; - static const ALfloat angles_X71[8] = { -30.0f, 30.0f, 0.0f, 0.0f, - -110.0f, 110.0f, -90.0f, 90.0f }; - - static const enum Channel chans_Mono[1] = { FRONT_CENTER }; - static const enum Channel chans_Stereo[2] = { FRONT_LEFT, FRONT_RIGHT }; - static const enum Channel chans_Rear[2] = { BACK_LEFT, BACK_RIGHT }; - static const enum Channel chans_Quad[4] = { FRONT_LEFT, FRONT_RIGHT, - BACK_LEFT, BACK_RIGHT }; - static const enum Channel chans_X51[6] = { FRONT_LEFT, FRONT_RIGHT, - FRONT_CENTER, LFE, - BACK_LEFT, BACK_RIGHT }; - static const enum Channel chans_X61[7] = { FRONT_LEFT, FRONT_RIGHT, - FRONT_CENTER, LFE, BACK_CENTER, - SIDE_LEFT, SIDE_RIGHT }; - static const enum Channel chans_X71[8] = { FRONT_LEFT, FRONT_RIGHT, - FRONT_CENTER, LFE, - BACK_LEFT, BACK_RIGHT, - SIDE_LEFT, SIDE_RIGHT }; + static const struct ChanMap MonoMap[1] = { { FRONT_CENTER, 0.0f } }; + static const struct ChanMap StereoMap[2] = { { FRONT_LEFT, -30.0f }, + { FRONT_RIGHT, 30.0f } }; + static const struct ChanMap RearMap[2] = { { BACK_LEFT, -150.0f }, + { BACK_RIGHT, 150.0f } }; + static const struct ChanMap QuadMap[4] = { { FRONT_LEFT, -45.0f }, + { FRONT_RIGHT, 45.0f }, + { BACK_LEFT, -135.0f }, + { BACK_RIGHT, 135.0f } }; + static const struct ChanMap X51Map[6] = { { FRONT_LEFT, -30.0f }, + { FRONT_RIGHT, 30.0f }, + { FRONT_CENTER, 0.0f }, + { LFE, 0.0f }, + { BACK_LEFT, -110.0f }, + { BACK_RIGHT, 110.0f } }; + static const struct ChanMap X61Map[7] = { { FRONT_LEFT, -30.0f }, + { FRONT_RIGHT, 30.0f }, + { FRONT_CENTER, 0.0f }, + { LFE, 0.0f }, + { BACK_CENTER, 180.0f }, + { SIDE_LEFT, -90.0f }, + { SIDE_RIGHT, 90.0f } }; + static const struct ChanMap X71Map[8] = { { FRONT_LEFT, -30.0f }, + { FRONT_RIGHT, 30.0f }, + { FRONT_CENTER, 0.0f }, + { LFE, 0.0f }, + { BACK_LEFT, -110.0f }, + { BACK_RIGHT, 110.0f }, + { SIDE_LEFT, -90.0f }, + { SIDE_RIGHT, 90.0f } }; ALCdevice *Device = ALContext->Device; ALfloat SourceVolume,ListenerGain,MinVolume,MaxVolume; @@ -96,8 +105,7 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) ALfloat WetGainHF[MAX_SENDS]; ALint NumSends, Frequency; const ALfloat *SpeakerGain; - const ALfloat *angles = NULL; - const enum Channel *chans = NULL; + const struct ChanMap *chans = NULL; enum Resampler Resampler; ALint num_channels = 0; ALboolean VirtualChannels; @@ -178,8 +186,7 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) switch(Channels) { case FmtMono: - angles = angles_Mono; - chans = chans_Mono; + chans = MonoMap; num_channels = 1; break; case FmtStereo: @@ -188,8 +195,8 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) DryGain *= aluSqrt(2.0f/4.0f); for(c = 0;c < 2;c++) { - pos = aluCart2LUTpos(aluCos(F_PI/180.0f * angles_Rear[c]), - aluSin(F_PI/180.0f * angles_Rear[c])); + pos = aluCart2LUTpos(aluCos(F_PI/180.0f * RearMap[c].angle), + aluSin(F_PI/180.0f * RearMap[c].angle)); SpeakerGain = Device->PanningLUT[pos]; for(i = 0;i < (ALint)Device->NumChan;i++) @@ -200,38 +207,32 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) } } } - angles = angles_Stereo; - chans = chans_Stereo; + chans = StereoMap; num_channels = 2; break; case FmtRear: - angles = angles_Rear; - chans = chans_Rear; + chans = RearMap; num_channels = 2; break; case FmtQuad: - angles = angles_Quad; - chans = chans_Quad; + chans = QuadMap; num_channels = 4; break; case FmtX51: - angles = angles_X51; - chans = chans_X51; + chans = X51Map; num_channels = 6; break; case FmtX61: - angles = angles_X61; - chans = chans_X61; + chans = X61Map; num_channels = 7; break; case FmtX71: - angles = angles_X71; - chans = chans_X71; + chans = X71Map; num_channels = 8; break; } @@ -239,13 +240,13 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) if(VirtualChannels == AL_FALSE) { for(c = 0;c < num_channels;c++) - SrcMatrix[c][chans[c]] += DryGain * ListenerGain; + SrcMatrix[c][chans[c].channel] += DryGain * ListenerGain; } else if(Device->Hrtf) { for(c = 0;c < num_channels;c++) { - if(chans[c] == LFE) + if(chans[c].channel == LFE) { /* Skip LFE */ ALSource->Params.HrtfDelay[c][0] = 0; @@ -261,7 +262,7 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) /* Get the static HRIR coefficients and delays for this * channel. */ GetLerpedHrtfCoeffs(Device->Hrtf, - 0.0f, F_PI/180.0f * angles[c], + 0.0f, F_PI/180.0f * chans[c].angle, DryGain*ListenerGain, ALSource->Params.HrtfCoeffs[c], ALSource->Params.HrtfDelay[c]); @@ -273,13 +274,13 @@ ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext) { for(c = 0;c < num_channels;c++) { - if(chans[c] == LFE) /* Special-case LFE */ + if(chans[c].channel == LFE) /* Special-case LFE */ { SrcMatrix[c][LFE] += DryGain * ListenerGain; continue; } - pos = aluCart2LUTpos(aluCos(F_PI/180.0f * angles[c]), - aluSin(F_PI/180.0f * angles[c])); + pos = aluCart2LUTpos(aluCos(F_PI/180.0f * chans[c].angle), + aluSin(F_PI/180.0f * chans[c].angle)); SpeakerGain = Device->PanningLUT[pos]; for(i = 0;i < (ALint)Device->NumChan;i++) -- cgit v1.2.3