Alc/effects/dedicated.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 2011 by Chris Robinson.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24
  25 #include "alMain.h"
  26 #include "alFilter.h"
  27 #include "alAuxEffectSlot.h"
  28 #include "alError.h"
  29 #include "alu.h"
  30
  31
  32 typedef struct ALdedicatedState {
  33     DERIVE_FROM_TYPE(ALeffectState);
  34
  35     ALfloat gains[MAX_OUTPUT_CHANNELS];
  36 } ALdedicatedState;
  37
  38 static ALvoid ALdedicatedState_Destruct(ALdedicatedState *state);
  39 static ALboolean ALdedicatedState_deviceUpdate(ALdedicatedState *state, ALCdevice *device);
  40 static ALvoid ALdedicatedState_update(ALdedicatedState *state, const ALCdevice *device, const ALeffectslot *Slot, const ALeffectProps *props);
  41 static ALvoid ALdedicatedState_process(ALdedicatedState *state, ALsizei SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALsizei NumChannels);
  42 DECLARE_DEFAULT_ALLOCATORS(ALdedicatedState)
  43
  44 DEFINE_ALEFFECTSTATE_VTABLE(ALdedicatedState);
  45
  46
  47 static void ALdedicatedState_Construct(ALdedicatedState *state)
  48 {
  49     ALsizei s;
  50
  51     ALeffectState_Construct(STATIC_CAST(ALeffectState, state));
  52     SET_VTABLE2(ALdedicatedState, ALeffectState, state);
  53
  54     for(s = 0;s < MAX_OUTPUT_CHANNELS;s++)
  55         state->gains[s] = 0.0f;
  56 }
  57
  58 static ALvoid ALdedicatedState_Destruct(ALdedicatedState *state)
  59 {
  60     ALeffectState_Destruct(STATIC_CAST(ALeffectState,state));
  61 }
  62
  63 static ALboolean ALdedicatedState_deviceUpdate(ALdedicatedState *UNUSED(state), ALCdevice *UNUSED(device))
  64 {
  65     return AL_TRUE;
  66 }
  67
  68 static ALvoid ALdedicatedState_update(ALdedicatedState *state, const ALCdevice *device, const ALeffectslot *Slot, const ALeffectProps *props)
  69 {
  70     ALfloat Gain;
  71     ALuint i;
  72
  73     for(i = 0;i < MAX_OUTPUT_CHANNELS;i++)
  74         state->gains[i] = 0.0f;
  75
  76     Gain = Slot->Params.Gain * props->Dedicated.Gain;
  77     if(Slot->Params.EffectType == AL_EFFECT_DEDICATED_LOW_FREQUENCY_EFFECT)
  78     {
  79         int idx;
  80         if((idx=GetChannelIdxByName(device->RealOut, LFE)) != -1)
  81         {
  82             STATIC_CAST(ALeffectState,state)->OutBuffer = device->RealOut.Buffer;
  83             STATIC_CAST(ALeffectState,state)->OutChannels = device->RealOut.NumChannels;
  84             state->gains[idx] = Gain;
  85         }
  86     }
  87     else if(Slot->Params.EffectType == AL_EFFECT_DEDICATED_DIALOGUE)
  88     {
  89         int idx;
  90         /* Dialog goes to the front-center speaker if it exists, otherwise it
  91          * plays from the front-center location. */
  92         if((idx=GetChannelIdxByName(device->RealOut, FrontCenter)) != -1)
  93         {
  94             STATIC_CAST(ALeffectState,state)->OutBuffer = device->RealOut.Buffer;
  95             STATIC_CAST(ALeffectState,state)->OutChannels = device->RealOut.NumChannels;
  96             state->gains[idx] = Gain;
  97         }
  98         else
  99         {
 100             ALfloat coeffs[MAX_AMBI_COEFFS];
 101             CalcAngleCoeffs(0.0f, 0.0f, 0.0f, coeffs);
 102
 103             STATIC_CAST(ALeffectState,state)->OutBuffer = device->Dry.Buffer;
 104             STATIC_CAST(ALeffectState,state)->OutChannels = device->Dry.NumChannels;
 105             ComputePanningGains(device->Dry, coeffs, Gain, state->gains);
 106         }
 107     }
 108 }
 109
 110 static ALvoid ALdedicatedState_process(ALdedicatedState *state, ALsizei SamplesToDo, const ALfloat (*restrict SamplesIn)[BUFFERSIZE], ALfloat (*restrict SamplesOut)[BUFFERSIZE], ALsizei NumChannels)
 111 {
 112     ALsizei i, c;
 113
 114     SamplesIn = ASSUME_ALIGNED(SamplesIn, 16);
 115     SamplesOut = ASSUME_ALIGNED(SamplesOut, 16);
 116     for(c = 0;c < NumChannels;c++)
 117     {
 118         const ALfloat gain = state->gains[c];
 119         if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
 120             continue;
 121
 122         for(i = 0;i < SamplesToDo;i++)
 123             SamplesOut[c][i] += SamplesIn[0][i] * gain;
 124     }
 125 }
 126
 127
 128 typedef struct ALdedicatedStateFactory {
 129     DERIVE_FROM_TYPE(ALeffectStateFactory);
 130 } ALdedicatedStateFactory;
 131
 132 ALeffectState *ALdedicatedStateFactory_create(ALdedicatedStateFactory *UNUSED(factory))
 133 {
 134     ALdedicatedState *state;
 135
 136     NEW_OBJ0(state, ALdedicatedState)();
 137     if(!state) return NULL;
 138
 139     return STATIC_CAST(ALeffectState, state);
 140 }
 141
 142 DEFINE_ALEFFECTSTATEFACTORY_VTABLE(ALdedicatedStateFactory);
 143
 144
 145 ALeffectStateFactory *ALdedicatedStateFactory_getFactory(void)
 146 {
 147     static ALdedicatedStateFactory DedicatedFactory = { { GET_VTABLE2(ALdedicatedStateFactory, ALeffectStateFactory) } };
 148
 149     return STATIC_CAST(ALeffectStateFactory, &DedicatedFactory);
 150 }
 151
 152
 153 void ALdedicated_setParami(ALeffect *UNUSED(effect), ALCcontext *context, ALenum UNUSED(param), ALint UNUSED(val))
 154 { SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
 155 void ALdedicated_setParamiv(ALeffect *effect, ALCcontext *context, ALenum param, const ALint *vals)
 156 {
 157     ALdedicated_setParami(effect, context, param, vals[0]);
 158 }
 159 void ALdedicated_setParamf(ALeffect *effect, ALCcontext *context, ALenum param, ALfloat val)
 160 {
 161     ALeffectProps *props = &effect->Props;
 162     switch(param)
 163     {
 164         case AL_DEDICATED_GAIN:
 165             if(!(val >= 0.0f && isfinite(val)))
 166                 SET_ERROR_AND_RETURN(context, AL_INVALID_VALUE);
 167             props->Dedicated.Gain = val;
 168             break;
 169
 170         default:
 171             SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
 172     }
 173 }
 174 void ALdedicated_setParamfv(ALeffect *effect, ALCcontext *context, ALenum param, const ALfloat *vals)
 175 {
 176     ALdedicated_setParamf(effect, context, param, vals[0]);
 177 }
 178
 179 void ALdedicated_getParami(const ALeffect *UNUSED(effect), ALCcontext *context, ALenum UNUSED(param), ALint *UNUSED(val))
 180 { SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM); }
 181 void ALdedicated_getParamiv(const ALeffect *effect, ALCcontext *context, ALenum param, ALint *vals)
 182 {
 183     ALdedicated_getParami(effect, context, param, vals);
 184 }
 185 void ALdedicated_getParamf(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *val)
 186 {
 187     const ALeffectProps *props = &effect->Props;
 188     switch(param)
 189     {
 190         case AL_DEDICATED_GAIN:
 191             *val = props->Dedicated.Gain;
 192             break;
 193
 194         default:
 195             SET_ERROR_AND_RETURN(context, AL_INVALID_ENUM);
 196     }
 197 }
 198 void ALdedicated_getParamfv(const ALeffect *effect, ALCcontext *context, ALenum param, ALfloat *vals)
 199 {
 200     ALdedicated_getParamf(effect, context, param, vals);
 201 }
 202
 203 DEFINE_ALEFFECT_VTABLE(ALdedicated);