diff options
Diffstat (limited to 'Alc/ALc.c')
| -rw-r--r-- | Alc/ALc.c | 82 |
1 files changed, 82 insertions, 0 deletions
@@ -507,6 +507,87 @@ void EnableRTPrio(ALint level) AL_PRINT("Failed to set priority level for thread\n"); } +static void SetupChannelMatrix(ALCdevice *Device) +{ + ALuint s, s2; + + for(s = 0;s < OUTPUTCHANNELS;s++) + { + for(s2 = 0;s2 < OUTPUTCHANNELS;s2++) + Device->ChannelMatrix[s][s2] = ((s==s2) ? 1.0f : 0.0f); + } + + switch(Device->Format) + { + case AL_FORMAT_MONO8: + case AL_FORMAT_MONO16: + case AL_FORMAT_MONO_FLOAT32: + Device->ChannelMatrix[FRONT_LEFT][FRONT_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[FRONT_RIGHT][FRONT_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_LEFT][FRONT_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_RIGHT][FRONT_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_LEFT][FRONT_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_RIGHT][FRONT_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][FRONT_CENTER] = 1.0f; + break; + + case AL_FORMAT_STEREO8: + case AL_FORMAT_STEREO16: + case AL_FORMAT_STEREO_FLOAT32: + Device->ChannelMatrix[FRONT_CENTER][FRONT_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[FRONT_CENTER][FRONT_RIGHT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_LEFT][FRONT_LEFT] = 1.0f; + Device->ChannelMatrix[SIDE_RIGHT][FRONT_RIGHT] = 1.0f; + Device->ChannelMatrix[BACK_LEFT][FRONT_LEFT] = 1.0f; + Device->ChannelMatrix[BACK_RIGHT][FRONT_RIGHT] = 1.0f; + Device->ChannelMatrix[BACK_CENTER][FRONT_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][FRONT_RIGHT] = aluSqrt(0.5); + break; + + case AL_FORMAT_QUAD8: + case AL_FORMAT_QUAD16: + case AL_FORMAT_QUAD32: + Device->ChannelMatrix[FRONT_CENTER][FRONT_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[FRONT_CENTER][FRONT_RIGHT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_LEFT][FRONT_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_LEFT][BACK_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_RIGHT][FRONT_RIGHT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_RIGHT][BACK_RIGHT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5); + break; + + case AL_FORMAT_51CHN8: + case AL_FORMAT_51CHN16: + case AL_FORMAT_51CHN32: + Device->ChannelMatrix[SIDE_LEFT][FRONT_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_LEFT][BACK_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_RIGHT][FRONT_RIGHT] = aluSqrt(0.5); + Device->ChannelMatrix[SIDE_RIGHT][BACK_RIGHT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5); + break; + + case AL_FORMAT_61CHN8: + case AL_FORMAT_61CHN16: + case AL_FORMAT_61CHN32: + Device->ChannelMatrix[BACK_LEFT][BACK_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_LEFT][SIDE_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_RIGHT][BACK_CENTER] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_RIGHT][SIDE_RIGHT] = aluSqrt(0.5); + break; + + case AL_FORMAT_71CHN8: + case AL_FORMAT_71CHN16: + case AL_FORMAT_71CHN32: + Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5); + Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5); + break; + + default: + assert(0); + } +} /* IsDevice @@ -1283,6 +1364,7 @@ ALC_API ALCcontext* ALC_APIENTRY alcCreateContext(ALCdevice *device, const ALCin ProcessContext(NULL); return NULL; } + SetupChannelMatrix(device); for(i = 0;i < device->NumContexts;i++) { |