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Urgh .. use memset to silence some bogus GCC warnings about using potentially uninitialized values, while that will not actually be possible. In any case, it is annoying.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 02 Oct 2012 18:52:28 +0300
parents 2edda27f951c
children 1ba202b448e0
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/*
 * miniJSS - Mixing routines in C
 * Programmed and designed by Matti 'ccr' Hamalainen
 * (C) Copyright 2006-2007 Tecnic Software productions (TNSP)
 */

//#define JMIXER_DEBUG fprintf(stderr, "[%.8x:%.8x / %.8x]: %d\n", FP_GETH(tmpPos), FP_GETL(tmpPos), endPos, sp[FP_GETH(tmpPos)]);
#define JMIXER_DEBUG
#define JMIXER_ADDBUF_TYPE Sint32


/* Mono / Linear Interpolation
 */
#define JMIXER_SAMPLE_TYPE Sint16
#define JMIXER_INIT        const Sint32 vol = (chn->chVolume * mixer->globalVol) / 256;
#define JMIXER_FUNC \
    memmove(&tl[0], &tl[1], 4 * sizeof(tl[0])); \
    tl[4] = (((Sint32) sp[FP_GETH(tmpPos)]) * vol * 3 + tl[3] * 2 + tl[2] + tl[1] + tl[0]) / (256 * 8); *(ap++) += tl[4]; \

#define JMIXER_NAME        jvmMix_Mono_C_FW
#define JMIXER_NEXT        FP_ADD(tmpPos, tmpDelta);
#define JMIXER_ENDCOND     (FP_GETH(tmpPos) < endPos)
#include "jmixtmpl_c.h"

#define JMIXER_NAME        jvmMix_Mono_C_BW
#define JMIXER_NEXT        FP_SUB(tmpPos, tmpDelta);
#define JMIXER_ENDCOND     (FP_GETH(tmpPos) > endPos)
#include "jmixtmpl_c.h"


#undef JMIXER_SAMPLE_TYPE
#undef JMIXER_INIT
#undef JMIXER_FUNC


/* Stereo / Linear Interpolation
 */
#define JMIXER_SAMPLE_TYPE Sint16
#define JMIXER_INIT        const Sint32 vol_l = (chn->chVolume * mixer->globalVol) / 256, \
                                        vol_r = (chn->chVolume * mixer->globalVol) / 256;

#define JMIXER_FUNC \
    memmove(&tl[0], &tl[1], 4 * sizeof(tl[0])); \
    memmove(&tr[0], &tr[1], 4 * sizeof(tr[0])); \
    tl[4] = (((Sint32) sp[FP_GETH(tmpPos)]) * vol_l * 3 + tl[3] * 2 + tl[2] + tl[1] + tl[0]) / (256 * 8); *(ap++) += tl[4]; \
    tr[4] = (((Sint32) sp[FP_GETH(tmpPos)]) * vol_r * 3 + tr[3] * 2 + tr[2] + tr[1] + tr[0]) / (256 * 8); *(ap++) += tr[4];

#define JMIXER_NAME        jvmMix_Stereo_C_FW
#define JMIXER_NEXT        FP_ADD(tmpPos, tmpDelta);
#define JMIXER_ENDCOND     (FP_GETH(tmpPos) < endPos)
#include "jmixtmpl_c.h"

#define JMIXER_NAME        jvmMix_Stereo_C_BW
#define JMIXER_NEXT        FP_SUB(tmpPos, tmpDelta);
#define JMIXER_ENDCOND     (FP_GETH(tmpPos) > endPos)
#include "jmixtmpl_c.h"


#undef JMIXER_SAMPLE_TYPE
#undef JMIXER_INIT
#undef JMIXER_FUNC


/* Post processing functions
 */
#define JMIXER_CLAMP \
    if (t < JVM_LIMIT_16_NEG) t = JVM_LIMIT_16_NEG; else    \
    if (t > JVM_LIMIT_16_POS) t = JVM_LIMIT_16_POS;

#define JMIXER_NAME jvmPostProcess_U8_C
#define JMIXER_TYPE Uint8
#define JMIXER_FUNCTION *(sp++) = (t + JVM_ADD_16) >> 8;
#include "jmix_post_c.h"


#define JMIXER_NAME jvmPostProcess_S8_C
#define JMIXER_TYPE Sint8
#define JMIXER_FUNCTION *(sp++) = t >> 8;
#include "jmix_post_c.h"


#define JMIXER_NAME jvmPostProcess_U16_C
#define JMIXER_TYPE Uint16
#define JMIXER_FUNCTION *(sp++) = t + JVM_ADD_16;
#include "jmix_post_c.h"


#define JMIXER_NAME jvmPostProcess_S16_C
#define JMIXER_TYPE Sint16
#define JMIXER_FUNCTION *(sp++) = t;
#include "jmix_post_c.h"