<commit_before>/**
 * OpenAL cross platform audio library
 * Copyright (C) 1999-2007 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 "alSource.h"
#include "alBuffer.h"
#include "alListener.h"
#include "alAuxEffectSlot.h"
#include "alu.h"
#include "bs2b.h"


static inline ALfloat Sample_ALbyte(ALbyte val)
{ return val * (1.0f/127.0f); }

static inline ALfloat Sample_ALshort(ALshort val)
{ return val * (1.0f/32767.0f); }

static inline ALfloat Sample_ALfloat(ALfloat val)
{ return val; }

#define DECL_TEMPLATE(T)                                                      \
static void Load_##T(ALfloat *dst, const T *src, ALuint srcstep, ALuint samples)\
{                                                                             \
    ALuint i;                                                                 \
    for(i = 0;i < samples;i++)                                                \
        dst[i] = Sample_##T(src[i*srcstep]);                                  \
}

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALfloat)

#undef DECL_TEMPLATE

static void LoadData(ALfloat *dst, const ALvoid *src, ALuint srcstep, enum FmtType srctype, ALuint samples)
{
    switch(srctype)
    {
        case FmtByte:
            Load_ALbyte(dst, src, srcstep, samples);
            break;
        case FmtShort:
            Load_ALshort(dst, src, srcstep, samples);
            break;
        case FmtFloat:
            Load_ALfloat(dst, src, srcstep, samples);
            break;
    }
}

static void SilenceData(ALfloat *dst, ALuint samples)
{
    ALuint i;
    for(i = 0;i < samples;i++)
        dst[i] = 0.0f;
}


static const ALfloat *DoFilters(ALfilterState *lpfilter, ALfilterState *hpfilter,
                                ALfloat *restrict dst, const ALfloat *restrict src,
                                ALuint numsamples, enum ActiveFilters type)
{
    ALuint i;
    switch(type)
    {
        case AF_None:
            break;

        case AF_LowPass:
            ALfilterState_process(lpfilter, dst, src, numsamples);
            return dst;
        case AF_HighPass:
            ALfilterState_process(hpfilter, dst, src, numsamples);
            return dst;

        case AF_BandPass:
            for(i = 0;i < numsamples;)
            {
                ALfloat temp[64];
                ALuint todo = minu(64, numsamples-i);

                ALfilterState_process(lpfilter, temp, src, todo);
                ALfilterState_process(hpfilter, dst, temp, todo);
                i += todo;
            }
            return dst;
    }
    return src;
}
<commit_msg>Properly process all samples with a bandpass filter<commit_after>/**
 * OpenAL cross platform audio library
 * Copyright (C) 1999-2007 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 "alSource.h"
#include "alBuffer.h"
#include "alListener.h"
#include "alAuxEffectSlot.h"
#include "alu.h"
#include "bs2b.h"


static inline ALfloat Sample_ALbyte(ALbyte val)
{ return val * (1.0f/127.0f); }

static inline ALfloat Sample_ALshort(ALshort val)
{ return val * (1.0f/32767.0f); }

static inline ALfloat Sample_ALfloat(ALfloat val)
{ return val; }

#define DECL_TEMPLATE(T)                                                      \
static void Load_##T(ALfloat *dst, const T *src, ALuint srcstep, ALuint samples)\
{                                                                             \
    ALuint i;                                                                 \
    for(i = 0;i < samples;i++)                                                \
        dst[i] = Sample_##T(src[i*srcstep]);                                  \
}

DECL_TEMPLATE(ALbyte)
DECL_TEMPLATE(ALshort)
DECL_TEMPLATE(ALfloat)

#undef DECL_TEMPLATE

static void LoadData(ALfloat *dst, const ALvoid *src, ALuint srcstep, enum FmtType srctype, ALuint samples)
{
    switch(srctype)
    {
        case FmtByte:
            Load_ALbyte(dst, src, srcstep, samples);
            break;
        case FmtShort:
            Load_ALshort(dst, src, srcstep, samples);
            break;
        case FmtFloat:
            Load_ALfloat(dst, src, srcstep, samples);
            break;
    }
}

static void SilenceData(ALfloat *dst, ALuint samples)
{
    ALuint i;
    for(i = 0;i < samples;i++)
        dst[i] = 0.0f;
}


static const ALfloat *DoFilters(ALfilterState *lpfilter, ALfilterState *hpfilter,
                                ALfloat *restrict dst, const ALfloat *restrict src,
                                ALuint numsamples, enum ActiveFilters type)
{
    ALuint i;
    switch(type)
    {
        case AF_None:
            break;

        case AF_LowPass:
            ALfilterState_process(lpfilter, dst, src, numsamples);
            return dst;
        case AF_HighPass:
            ALfilterState_process(hpfilter, dst, src, numsamples);
            return dst;

        case AF_BandPass:
            for(i = 0;i < numsamples;)
            {
                ALfloat temp[64];
                ALuint todo = minu(64, numsamples-i);

                ALfilterState_process(lpfilter, temp, src+i, todo);
                ALfilterState_process(hpfilter, dst+i, temp, todo);
                i += todo;
            }
            return dst;
    }
    return src;
}

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