/** * OpenAL cross platform audio library * Copyright (C) 2011 by Chris Robinson. * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * Or go to http://www.gnu.org/copyleft/lgpl.html */ #include "config.h" #include <stdlib.h> #include "alMain.h" #include "alFilter.h" #include "alAuxEffectSlot.h" #include "alError.h" #include "alu.h" typedef struct ALdedicatedState { DERIVE_FROM_TYPE(ALeffectState); ALfloat gains[MAX_OUTPUT_CHANNELS]; } ALdedicatedState; static ALvoid ALdedicatedState_Destruct(ALdedicatedState *state); static ALboolean ALdedicatedState_deviceUpdate(ALdedicatedState *state, ALCdevice *device); static ALvoid ALdedicatedState_update(ALdedicatedState *state, const ALCdevice *device, const ALeffectslot *Slot, const ALeffectProps *props); static ALvoid ALdedicatedState_process(ALdedicatedState *state, ALuint SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALuint NumChannels); DECLARE_DEFAULT_ALLOCATORS(ALdedicatedState) DEFINE_ALEFFECTSTATE_VTABLE(ALdedicatedState); static void ALdedicatedState_Construct(ALdedicatedState *state) { ALsizei s; ALeffectState_Construct(STATIC_CAST(ALeffectState, state)); SET_VTABLE2(ALdedicatedState, ALeffectState, state); for(s = 0;s < MAX_OUTPUT_CHANNELS;s++) state->gains[s] = 0.0f; } static ALvoid ALdedicatedState_Destruct(ALdedicatedState *state) { ALeffectState_Destruct(STATIC_CAST(ALeffectState,state)); } static ALboolean ALdedicatedState_deviceUpdate(ALdedicatedState *UNUSED(state), ALCdevice *UNUSED(device)) { return AL_TRUE; } static ALvoid ALdedicatedState_update(ALdedicatedState *state, const ALCdevice *device, const ALeffectslot *Slot, const ALeffectProps *props) { ALfloat Gain; ALuint i; for(i = 0;i < MAX_OUTPUT_CHANNELS;i++) state->gains[i] = 0.0f; Gain = Slot->Params.Gain * props->Dedicated.Gain; if(Slot->Params.EffectType == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT) { int idx; if((idx=GetChannelIdxByName(device->RealOut, LFE)) != -1) { STATIC_CAST(ALeffectState,state)->OutBuffer = device->RealOut.Buffer; STATIC_CAST(ALeffectState,state)->OutChannels = device->RealOut.NumChannels; state->gains[idx] = Gain; } } else if(Slot->Params.EffectType == AL_EFFECT_DEDICATED_DIALOGUE) { int idx; /* Dialog goes to the front-center speaker if it exists, otherwise it * plays from the front-center location. */ if((idx=GetChannelIdxByName(device->RealOut, FrontCenter)) != -1) { STATIC_CAST(ALeffectState,state)->OutBuffer = device->RealOut.Buffer; STATIC_CAST(ALeffectState,state)->OutChannels = device->RealOut.NumChannels; state->gains[idx] = Gain; } else { ALfloat coeffs[MAX_AMBI_COEFFS]; CalcXYZCoeffs(0.0f, 0.0f, -1.0f, 0.0f, coeffs); STATIC_CAST(ALeffectState,state)->OutBuffer = device->Dry.Buffer; STATIC_CAST(ALeffectState,state)->OutChannels = device->Dry.NumChannels; ComputePanningGains(device->Dry, coeffs, Gain, state->gains); } } } static ALvoid ALdedicatedState_process(ALdedicatedState *state, ALuint SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALuint NumChannels) { const ALfloat *gains = state->gains; ALuint i, c; for(c = 0;c < NumChannels;c++) { if(!(fabsf(gains[c]) > GAIN_SILENCE_THRESHOLD)) continue; for(i = 0;i < SamplesToDo;i++) SamplesOut[c][i] += SamplesIn[0][i] * gains[c]; } } typedef struct ALdedicatedStateFactory { DERIVE_FROM_TYPE(ALeffectStateFactory); } ALdedicatedStateFactory; ALeffectState *ALdedicatedStateFactory_create(ALdedicatedStateFactory *UNUSED(factory)) { ALdedicatedState *state; NEW_OBJ0(state, ALdedicatedState)(); if(!state) return NULL; return STATIC_CAST(ALeffectState, state); } DEFINE_ALEFFECTSTATEFACTORY_VTABLE(ALdedicatedStateFactory); ALeffectStateFactory *ALdedicatedStateFactory_getFactory(void) { static ALdedicatedStateFactory DedicatedFactory = { { GET_VTABLE2(ALdedicatedStateFactory, ALeffectStateFactory) } }; return STATIC_CAST(ALeffectStateFactory, &DedicatedFactory); } void ALdedicated_setParami(ALeffect *UNUSED(effect), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val)) { SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); } void ALdedicated_setParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals) { ALdedicated_setParami(effect, context, param, vals[0]); } void ALdedicated_setParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val) { ALeffectProps *props = &effect->Props; switch(param) { case AL_DEDICATED_GAIN: if(!(val >= 0.0f && isfinite(val))) SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE); props->Dedicated.Gain = val; break; default: SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); } } void ALdedicated_setParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals) { ALdedicated_setParamf(effect, context, param, vals[0]); } void ALdedicated_getParami(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(val)) { SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); } void ALdedicated_getParamiv(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals) { ALdedicated_getParami(effect, context, param, vals); } void ALdedicated_getParamf(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val) { const ALeffectProps *props = &effect->Props; switch(param) { case AL_DEDICATED_GAIN: *val = props->Dedicated.Gain; break; default: SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); } } void ALdedicated_getParamfv(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals) { ALdedicated_getParamf(effect, context, param, vals); } DEFINE_ALEFFECT_VTABLE(ALdedicated);