362 lines
14 KiB
C
362 lines
14 KiB
C
/**
|
|
* OpenAL cross platform audio library
|
|
* Copyright (C) 1999-2010 by authors.
|
|
* 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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
* Or go to http://www.gnu.org/copyleft/lgpl.html
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <assert.h>
|
|
|
|
#include "alMain.h"
|
|
#include "AL/al.h"
|
|
#include "AL/alc.h"
|
|
#include "alu.h"
|
|
|
|
static void SetSpeakerArrangement(const char *name, ALfloat SpeakerAngle[OUTPUTCHANNELS],
|
|
Channel Speaker2Chan[OUTPUTCHANNELS], ALint chans)
|
|
{
|
|
char layout_str[256];
|
|
char *confkey, *next;
|
|
char *sep, *end;
|
|
Channel val;
|
|
int i;
|
|
|
|
strncpy(layout_str, GetConfigValue(NULL, name, ""), sizeof(layout_str));
|
|
layout_str[sizeof(layout_str)-1] = 0;
|
|
|
|
if(!layout_str[0])
|
|
return;
|
|
|
|
next = confkey = layout_str;
|
|
while(next && *next)
|
|
{
|
|
confkey = next;
|
|
next = strchr(confkey, ',');
|
|
if(next)
|
|
{
|
|
*next = 0;
|
|
do {
|
|
next++;
|
|
} while(isspace(*next) || *next == ',');
|
|
}
|
|
|
|
sep = strchr(confkey, '=');
|
|
if(!sep || confkey == sep)
|
|
continue;
|
|
|
|
end = sep - 1;
|
|
while(isspace(*end) && end != confkey)
|
|
end--;
|
|
*(++end) = 0;
|
|
|
|
if(strcmp(confkey, "fl") == 0 || strcmp(confkey, "front-left") == 0)
|
|
val = FRONT_LEFT;
|
|
else if(strcmp(confkey, "fr") == 0 || strcmp(confkey, "front-right") == 0)
|
|
val = FRONT_RIGHT;
|
|
else if(strcmp(confkey, "fc") == 0 || strcmp(confkey, "front-center") == 0)
|
|
val = FRONT_CENTER;
|
|
else if(strcmp(confkey, "bl") == 0 || strcmp(confkey, "back-left") == 0)
|
|
val = BACK_LEFT;
|
|
else if(strcmp(confkey, "br") == 0 || strcmp(confkey, "back-right") == 0)
|
|
val = BACK_RIGHT;
|
|
else if(strcmp(confkey, "bc") == 0 || strcmp(confkey, "back-center") == 0)
|
|
val = BACK_CENTER;
|
|
else if(strcmp(confkey, "sl") == 0 || strcmp(confkey, "side-left") == 0)
|
|
val = SIDE_LEFT;
|
|
else if(strcmp(confkey, "sr") == 0 || strcmp(confkey, "side-right") == 0)
|
|
val = SIDE_RIGHT;
|
|
else
|
|
{
|
|
AL_PRINT("Unknown speaker for %s: \"%s\"\n", name, confkey);
|
|
continue;
|
|
}
|
|
|
|
*(sep++) = 0;
|
|
while(isspace(*sep))
|
|
sep++;
|
|
|
|
for(i = 0;i < chans;i++)
|
|
{
|
|
if(Speaker2Chan[i] == val)
|
|
{
|
|
long angle = strtol(sep, NULL, 10);
|
|
if(angle >= -180 && angle <= 180)
|
|
SpeakerAngle[i] = angle * M_PI/180.0f;
|
|
else
|
|
AL_PRINT("Invalid angle for speaker \"%s\": %ld\n", confkey, angle);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(i = 0;i < chans;i++)
|
|
{
|
|
int min = i;
|
|
int i2;
|
|
|
|
for(i2 = i+1;i2 < chans;i2++)
|
|
{
|
|
if(SpeakerAngle[i2] < SpeakerAngle[min])
|
|
min = i2;
|
|
}
|
|
|
|
if(min != i)
|
|
{
|
|
ALfloat tmpf;
|
|
Channel tmpc;
|
|
|
|
tmpf = SpeakerAngle[i];
|
|
SpeakerAngle[i] = SpeakerAngle[min];
|
|
SpeakerAngle[min] = tmpf;
|
|
|
|
tmpc = Speaker2Chan[i];
|
|
Speaker2Chan[i] = Speaker2Chan[min];
|
|
Speaker2Chan[min] = tmpc;
|
|
}
|
|
}
|
|
}
|
|
|
|
static ALfloat aluLUTpos2Angle(ALint pos)
|
|
{
|
|
if(pos < QUADRANT_NUM)
|
|
return aluAtan((ALfloat)pos / (ALfloat)(QUADRANT_NUM - pos));
|
|
if(pos < 2 * QUADRANT_NUM)
|
|
return M_PI_2 + aluAtan((ALfloat)(pos - QUADRANT_NUM) / (ALfloat)(2 * QUADRANT_NUM - pos));
|
|
if(pos < 3 * QUADRANT_NUM)
|
|
return aluAtan((ALfloat)(pos - 2 * QUADRANT_NUM) / (ALfloat)(3 * QUADRANT_NUM - pos)) - M_PI;
|
|
return aluAtan((ALfloat)(pos - 3 * QUADRANT_NUM) / (ALfloat)(4 * QUADRANT_NUM - pos)) - M_PI_2;
|
|
}
|
|
|
|
ALvoid aluInitPanning(ALCdevice *Device)
|
|
{
|
|
ALfloat SpeakerAngle[OUTPUTCHANNELS];
|
|
Channel *Speaker2Chan;
|
|
ALfloat Alpha, Theta;
|
|
ALint pos, offset;
|
|
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);
|
|
}
|
|
|
|
Speaker2Chan = Device->Speaker2Chan;
|
|
switch(Device->Format)
|
|
{
|
|
case AL_FORMAT_MONO8:
|
|
case AL_FORMAT_MONO16:
|
|
case AL_FORMAT_MONO_FLOAT32:
|
|
Device->DuplicateStereo = AL_FALSE;
|
|
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;
|
|
Device->NumChan = 1;
|
|
Speaker2Chan[0] = FRONT_CENTER;
|
|
SpeakerAngle[0] = 0.0f * M_PI/180.0f;
|
|
break;
|
|
|
|
case AL_FORMAT_STEREO8:
|
|
case AL_FORMAT_STEREO16:
|
|
case AL_FORMAT_STEREO_FLOAT32:
|
|
Device->DuplicateStereo = AL_FALSE;
|
|
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);
|
|
Device->NumChan = 2;
|
|
Speaker2Chan[0] = FRONT_LEFT;
|
|
Speaker2Chan[1] = FRONT_RIGHT;
|
|
SpeakerAngle[0] = -90.0f * M_PI/180.0f;
|
|
SpeakerAngle[1] = 90.0f * M_PI/180.0f;
|
|
SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan);
|
|
break;
|
|
|
|
case AL_FORMAT_QUAD8:
|
|
case AL_FORMAT_QUAD16:
|
|
case AL_FORMAT_QUAD32:
|
|
Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0);
|
|
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);
|
|
Device->NumChan = 4;
|
|
Speaker2Chan[0] = BACK_LEFT;
|
|
Speaker2Chan[1] = FRONT_LEFT;
|
|
Speaker2Chan[2] = FRONT_RIGHT;
|
|
Speaker2Chan[3] = BACK_RIGHT;
|
|
SpeakerAngle[0] = -135.0f * M_PI/180.0f;
|
|
SpeakerAngle[1] = -45.0f * M_PI/180.0f;
|
|
SpeakerAngle[2] = 45.0f * M_PI/180.0f;
|
|
SpeakerAngle[3] = 135.0f * M_PI/180.0f;
|
|
SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan);
|
|
break;
|
|
|
|
case AL_FORMAT_51CHN8:
|
|
case AL_FORMAT_51CHN16:
|
|
case AL_FORMAT_51CHN32:
|
|
Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0);
|
|
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);
|
|
Device->NumChan = 5;
|
|
Speaker2Chan[0] = BACK_LEFT;
|
|
Speaker2Chan[1] = FRONT_LEFT;
|
|
Speaker2Chan[2] = FRONT_CENTER;
|
|
Speaker2Chan[3] = FRONT_RIGHT;
|
|
Speaker2Chan[4] = BACK_RIGHT;
|
|
SpeakerAngle[0] = -110.0f * M_PI/180.0f;
|
|
SpeakerAngle[1] = -30.0f * M_PI/180.0f;
|
|
SpeakerAngle[2] = 0.0f * M_PI/180.0f;
|
|
SpeakerAngle[3] = 30.0f * M_PI/180.0f;
|
|
SpeakerAngle[4] = 110.0f * M_PI/180.0f;
|
|
SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan);
|
|
break;
|
|
|
|
case AL_FORMAT_61CHN8:
|
|
case AL_FORMAT_61CHN16:
|
|
case AL_FORMAT_61CHN32:
|
|
Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0);
|
|
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);
|
|
Device->NumChan = 6;
|
|
Speaker2Chan[0] = SIDE_LEFT;
|
|
Speaker2Chan[1] = FRONT_LEFT;
|
|
Speaker2Chan[2] = FRONT_CENTER;
|
|
Speaker2Chan[3] = FRONT_RIGHT;
|
|
Speaker2Chan[4] = SIDE_RIGHT;
|
|
Speaker2Chan[5] = BACK_CENTER;
|
|
SpeakerAngle[0] = -90.0f * M_PI/180.0f;
|
|
SpeakerAngle[1] = -30.0f * M_PI/180.0f;
|
|
SpeakerAngle[2] = 0.0f * M_PI/180.0f;
|
|
SpeakerAngle[3] = 30.0f * M_PI/180.0f;
|
|
SpeakerAngle[4] = 90.0f * M_PI/180.0f;
|
|
SpeakerAngle[5] = 180.0f * M_PI/180.0f;
|
|
SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan);
|
|
break;
|
|
|
|
case AL_FORMAT_71CHN8:
|
|
case AL_FORMAT_71CHN16:
|
|
case AL_FORMAT_71CHN32:
|
|
Device->DuplicateStereo = GetConfigValueBool(NULL, "stereodup", 0);
|
|
Device->ChannelMatrix[BACK_CENTER][BACK_LEFT] = aluSqrt(0.5);
|
|
Device->ChannelMatrix[BACK_CENTER][BACK_RIGHT] = aluSqrt(0.5);
|
|
Device->NumChan = 7;
|
|
Speaker2Chan[0] = BACK_LEFT;
|
|
Speaker2Chan[1] = SIDE_LEFT;
|
|
Speaker2Chan[2] = FRONT_LEFT;
|
|
Speaker2Chan[3] = FRONT_CENTER;
|
|
Speaker2Chan[4] = FRONT_RIGHT;
|
|
Speaker2Chan[5] = SIDE_RIGHT;
|
|
Speaker2Chan[6] = BACK_RIGHT;
|
|
SpeakerAngle[0] = -150.0f * M_PI/180.0f;
|
|
SpeakerAngle[1] = -90.0f * M_PI/180.0f;
|
|
SpeakerAngle[2] = -30.0f * M_PI/180.0f;
|
|
SpeakerAngle[3] = 0.0f * M_PI/180.0f;
|
|
SpeakerAngle[4] = 30.0f * M_PI/180.0f;
|
|
SpeakerAngle[5] = 90.0f * M_PI/180.0f;
|
|
SpeakerAngle[6] = 150.0f * M_PI/180.0f;
|
|
SetSpeakerArrangement("layout", SpeakerAngle, Speaker2Chan, Device->NumChan);
|
|
break;
|
|
|
|
default:
|
|
assert(0);
|
|
}
|
|
|
|
if(GetConfigValueBool(NULL, "scalemix", 0))
|
|
{
|
|
ALfloat maxout = 1.0f;
|
|
for(s = 0;s < OUTPUTCHANNELS;s++)
|
|
{
|
|
ALfloat out = 0.0f;
|
|
for(s2 = 0;s2 < OUTPUTCHANNELS;s2++)
|
|
out += Device->ChannelMatrix[s2][s];
|
|
maxout = __max(maxout, out);
|
|
}
|
|
|
|
maxout = 1.0f/maxout;
|
|
for(s = 0;s < OUTPUTCHANNELS;s++)
|
|
{
|
|
for(s2 = 0;s2 < OUTPUTCHANNELS;s2++)
|
|
Device->ChannelMatrix[s2][s] *= maxout;
|
|
}
|
|
}
|
|
|
|
for(pos = 0; pos < LUT_NUM; pos++)
|
|
{
|
|
/* clear all values */
|
|
offset = OUTPUTCHANNELS * pos;
|
|
for(s = 0; s < OUTPUTCHANNELS; s++)
|
|
Device->PanningLUT[offset+s] = 0.0f;
|
|
|
|
if(Device->NumChan == 1)
|
|
{
|
|
Device->PanningLUT[offset + Speaker2Chan[0]] = 1.0f;
|
|
continue;
|
|
}
|
|
|
|
/* source angle */
|
|
Theta = aluLUTpos2Angle(pos);
|
|
|
|
/* set panning values */
|
|
for(s = 0; s < Device->NumChan - 1; s++)
|
|
{
|
|
if(Theta >= SpeakerAngle[s] && Theta < SpeakerAngle[s+1])
|
|
{
|
|
/* source between speaker s and speaker s+1 */
|
|
Alpha = M_PI_2 * (Theta-SpeakerAngle[s]) /
|
|
(SpeakerAngle[s+1]-SpeakerAngle[s]);
|
|
Device->PanningLUT[offset + Speaker2Chan[s]] = cos(Alpha);
|
|
Device->PanningLUT[offset + Speaker2Chan[s+1]] = sin(Alpha);
|
|
break;
|
|
}
|
|
}
|
|
if(s == Device->NumChan - 1)
|
|
{
|
|
/* source between last and first speaker */
|
|
if(Theta < SpeakerAngle[0])
|
|
Theta += 2.0f * M_PI;
|
|
Alpha = M_PI_2 * (Theta-SpeakerAngle[s]) /
|
|
(2.0f * M_PI + SpeakerAngle[0]-SpeakerAngle[s]);
|
|
Device->PanningLUT[offset + Speaker2Chan[s]] = cos(Alpha);
|
|
Device->PanningLUT[offset + Speaker2Chan[0]] = sin(Alpha);
|
|
}
|
|
}
|
|
}
|