--- /dev/null
+/* MikMod sound library
+ (c) 1998, 1999, 2000, 2001, 2002 Miodrag Vallat and others - see file
+ AUTHORS for complete list.
+
+ 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 program 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.
+*/
+
+/*==============================================================================
+
+ $Id$
+
+ Sample mixing routines, using a 32 bits mixing buffer.
+
+==============================================================================*/
+
+/*
+
+ Optional features include:
+ (a) 4-step reverb (for 16 bit output only)
+ (b) Interpolation of sample data during mixing
+ (c) Dolby Surround Sound
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_MEMORY_H
+#include <memory.h>
+#endif
+#include <string.h>
+
+#include "mikmod_internals.h"
+
+/*
+ Constant definitions
+ ====================
+
+ BITSHIFT
+ Controls the maximum volume of the sound output. All data is shifted
+ right by BITSHIFT after being mixed. Higher values result in quieter
+ sound and less chance of distortion.
+
+ REVERBERATION
+ Controls the duration of the reverb. Larger values represent a shorter
+ reverb loop. Smaller values extend the reverb but can result in more of
+ an echo-ish sound.
+
+*/
+
+#define BITSHIFT 9
+#define REVERBERATION 110000L
+
+#define FRACBITS 11
+#define FRACMASK ((1L<<FRACBITS)-1L)
+
+#define TICKLSIZE 8192
+#define TICKWSIZE (TICKLSIZE<<1)
+#define TICKBSIZE (TICKWSIZE<<1)
+
+#define CLICK_SHIFT 6
+#define CLICK_BUFFER (1L<<CLICK_SHIFT)
+
+#ifndef MIN
+#define MIN(a,b) (((a)<(b)) ? (a) : (b))
+#endif
+
+typedef struct VINFO {
+ UBYTE kick; /* =1 -> sample has to be restarted */
+ UBYTE active; /* =1 -> sample is playing */
+ UWORD flags; /* 16/8 bits looping/one-shot */
+ SWORD handle; /* identifies the sample */
+ ULONG start; /* start index */
+ ULONG size; /* samplesize */
+ ULONG reppos; /* loop start */
+ ULONG repend; /* loop end */
+ ULONG frq; /* current frequency */
+ int vol; /* current volume */
+ int pan; /* current panning position */
+
+ int rampvol;
+ int lvolsel,rvolsel; /* Volume factor in range 0-255 */
+ int oldlvol,oldrvol;
+
+ SLONGLONG current; /* current index in the sample */
+ SLONGLONG increment; /* increment value */
+} VINFO;
+
+static SWORD **Samples;
+static VINFO *vinf=NULL,*vnf;
+static long tickleft,samplesthatfit,vc_memory=0;
+static int vc_softchn;
+static SLONGLONG idxsize,idxlpos,idxlend;
+static SLONG *vc_tickbuf=NULL;
+static UWORD vc_mode;
+
+/* Reverb control variables */
+
+static int RVc1, RVc2, RVc3, RVc4, RVc5, RVc6, RVc7, RVc8;
+static ULONG RVRindex;
+
+/* For Mono or Left Channel */
+static SLONG *RVbufL1=NULL,*RVbufL2=NULL,*RVbufL3=NULL,*RVbufL4=NULL,
+ *RVbufL5=NULL,*RVbufL6=NULL,*RVbufL7=NULL,*RVbufL8=NULL;
+
+/* For Stereo only (Right Channel) */
+static SLONG *RVbufR1=NULL,*RVbufR2=NULL,*RVbufR3=NULL,*RVbufR4=NULL,
+ *RVbufR5=NULL,*RVbufR6=NULL,*RVbufR7=NULL,*RVbufR8=NULL;
+
+#ifdef NATIVE_64BIT_INT
+#define NATIVE SLONGLONG
+#else
+#define NATIVE SLONG
+#endif
+
+#if defined HAVE_SSE2 || defined HAVE_ALTIVEC
+
+# if !defined(NATIVE_64BIT_INT)
+static SINTPTR_T MixSIMDMonoNormal(const SWORD* srce,SLONG* dest,SINTPTR_T idx,SINTPTR_T increment,SINTPTR_T todo)
+{
+ /* TODO: */
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ }
+ return idx;
+}
+# endif /* !NATIVE_64BIT_INT */
+
+static SINTPTR_T MixSIMDStereoNormal(const SWORD* srce,SLONG* dest,SINTPTR_T idx,SINTPTR_T increment,SINTPTR_T todo)
+{
+ SWORD vol[8] = {vnf->lvolsel, vnf->rvolsel};
+ SWORD sample;
+ SLONG remain = todo;
+
+ /* Dest can be misaligned */
+ while(!IS_ALIGNED_16(dest)) {
+ sample=srce[idx >> FRACBITS];
+ idx += increment;
+ *dest++ += vol[0] * sample;
+ *dest++ += vol[1] * sample;
+ todo--;
+ if(!todo) return idx;
+ }
+
+ /* Srce is always aligned */
+
+#if defined HAVE_SSE2
+ remain = todo&3;
+ {
+ __m128i v0 = _mm_set_epi16(0, vol[1],
+ 0, vol[0],
+ 0, vol[1],
+ 0, vol[0]);
+ for(todo>>=2;todo; todo--)
+ {
+ SWORD s0 = srce[idx >> FRACBITS];
+ SWORD s1 = srce[(idx += increment) >> FRACBITS];
+ SWORD s2 = srce[(idx += increment) >> FRACBITS];
+ SWORD s3 = srce[(idx += increment) >> FRACBITS];
+ __m128i v1 = _mm_set_epi16(0, s1, 0, s1, 0, s0, 0, s0);
+ __m128i v2 = _mm_set_epi16(0, s3, 0, s3, 0, s2, 0, s2);
+ __m128i v3 = _mm_load_si128((__m128i*)(dest+0));
+ __m128i v4 = _mm_load_si128((__m128i*)(dest+4));
+ _mm_store_si128((__m128i*)(dest+0), _mm_add_epi32(v3, _mm_madd_epi16(v0, v1)));
+ _mm_store_si128((__m128i*)(dest+4), _mm_add_epi32(v4, _mm_madd_epi16(v0, v2)));
+ dest+=8;
+ idx += increment;
+ }
+ }
+
+#elif defined HAVE_ALTIVEC
+ remain = todo&3;
+ {
+ SWORD s[8];
+ vector signed short r0 = vec_ld(0, vol);
+ vector signed short v0 = vec_perm(r0, r0, (vector unsigned char)(0, 1, /* l */
+ 0, 1, /* l */
+ 2, 3, /* r */
+ 2, 1, /* r */
+ 0, 1, /* l */
+ 0, 1, /* l */
+ 2, 3, /* r */
+ 2, 3 /* r */
+ ));
+
+ for(todo>>=2;todo; todo--)
+ {
+ vector short int r1;
+ vector signed short v1, v2;
+ vector signed int v3, v4, v5, v6;
+
+ /* Load constants */
+ s[0] = srce[idx >> FRACBITS];
+ s[1] = srce[(idx += increment) >> FRACBITS];
+ s[2] = srce[(idx += increment) >> FRACBITS];
+ s[3] = srce[(idx += increment) >> FRACBITS];
+ s[4] = 0;
+
+ r1 = vec_ld(0, s);
+ v1 = vec_perm(r1, r1, (vector unsigned char)
+ (0*2, 0*2+1, /* s0 */
+ 4*2, 4*2+1, /* 0 */
+ 0*2, 0*2+1, /* s0 */
+ 4*2, 4*2+1, /* 0 */
+ 1*2, 1*2+1, /* s1 */
+ 4*2, 4*2+1, /* 0 */
+ 1*2, 1*2+1, /* s1 */
+ 4*2, 4*2+1 /* 0 */
+ ) );
+ v2 = vec_perm(r1, r1, (vector unsigned char)
+ (2*2, 2*2+1, /* s2 */
+ 4*2, 4*2+1, /* 0 */
+ 2*2, 2*2+1, /* s2 */
+ 4*2, 4*2+1, /* 0 */
+ 3*2, 3*2+1, /* s3 */
+ 4*2, 4*2+1, /* 0 */
+ 3*2, 3*2+1, /* s3 */
+ 4*2, 4*2+1 /* 0 */
+ ) );
+
+ v3 = vec_ld(0, dest);
+ v4 = vec_ld(0, dest + 4);
+ v5 = vec_mule(v0, v1);
+ v6 = vec_mule(v0, v2);
+
+ vec_st(vec_add(v3, v5), 0, dest);
+ vec_st(vec_add(v4, v6), 0x10, dest);
+
+ dest+=8;
+ idx += increment;
+ }
+ }
+#endif /* HAVE_ALTIVEC */
+
+ /* Remaining bits */
+ while(remain--) {
+ sample=srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += vol[0] * sample;
+ *dest++ += vol[1] * sample;
+ }
+ return idx;
+}
+#endif
+
+/*========== 32 bit sample mixers - only for 32 bit platforms */
+#ifndef NATIVE_64BIT_INT
+
+static SLONG Mix32MonoNormal(const SWORD* srce,SLONG* dest,SLONG idx,SLONG increment,SLONG todo)
+{
+#if defined HAVE_ALTIVEC || defined HAVE_SSE2
+ if (md_mode & DMODE_SIMDMIXER) {
+ return MixSIMDMonoNormal(srce, dest, idx, increment, todo);
+ }
+ else
+#endif
+ {
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ }
+ }
+ return idx;
+}
+
+/* FIXME: This mixer should works also on 64-bit platform */
+/* Hint : changes SLONG / SLONGLONG mess with intptr */
+static SLONG Mix32StereoNormal(const SWORD* srce,SLONG* dest,SLONG idx,SLONG increment,SLONG todo)
+{
+#if defined HAVE_ALTIVEC || defined HAVE_SSE2
+ if (md_mode & DMODE_SIMDMIXER) {
+ return MixSIMDStereoNormal(srce, dest, idx, increment, todo);
+ }
+ else
+#endif
+ {
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+
+ while(todo--) {
+ sample=srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ *dest++ += rvolsel * sample;
+ }
+ }
+ return idx;
+}
+
+static SLONG Mix32SurroundNormal(const SWORD* srce,SLONG* dest,SLONG idx,SLONG increment,SLONG todo)
+{
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+
+ if (lvolsel>=rvolsel) {
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel*sample;
+ *dest++ -= lvolsel*sample;
+ }
+ }
+ else {
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ -= rvolsel*sample;
+ *dest++ += rvolsel*sample;
+ }
+ }
+ return idx;
+}
+
+static SLONG Mix32MonoInterp(const SWORD* srce,SLONG* dest,SLONG idx,SLONG increment,SLONG todo)
+{
+ SLONG sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rampvol = vnf->rampvol;
+
+ if (rampvol) {
+ SLONG oldlvol = vnf->oldlvol - lvolsel;
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += ((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ if (!--rampvol)
+ break;
+ }
+ vnf->rampvol = rampvol;
+ if (todo < 0)
+ return idx;
+ }
+
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ }
+ return idx;
+}
+
+static SLONG Mix32StereoInterp(const SWORD* srce,SLONG* dest,SLONG idx,SLONG increment,SLONG todo)
+{
+ SLONG sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+ SLONG rampvol = vnf->rampvol;
+
+ if (rampvol) {
+ SLONG oldlvol = vnf->oldlvol - lvolsel;
+ SLONG oldrvol = vnf->oldrvol - rvolsel;
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += ((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ *dest++ += ((rvolsel << CLICK_SHIFT) + oldrvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ if (!--rampvol)
+ break;
+ }
+ vnf->rampvol = rampvol;
+ if (todo < 0)
+ return idx;
+ }
+
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ *dest++ += rvolsel * sample;
+ }
+ return idx;
+}
+
+static SLONG Mix32SurroundInterp(const SWORD* srce,SLONG* dest,SLONG idx,SLONG increment,SLONG todo)
+{
+ SLONG sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+ SLONG rampvol = vnf->rampvol;
+ SLONG oldvol, vol;
+
+ if (lvolsel >= rvolsel) {
+ vol = lvolsel;
+ oldvol = vnf->oldlvol;
+ } else {
+ vol = rvolsel;
+ oldvol = vnf->oldrvol;
+ }
+
+ if (rampvol) {
+ oldvol -= vol;
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ sample=((vol << CLICK_SHIFT) + oldvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ *dest++ += sample;
+ *dest++ -= sample;
+
+ if (!--rampvol)
+ break;
+ }
+ vnf->rampvol = rampvol;
+ if (todo < 0)
+ return idx;
+ }
+
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += vol*sample;
+ *dest++ -= vol*sample;
+ }
+ return idx;
+}
+#endif
+
+/*========== 64 bit sample mixers - all platforms */
+
+static SLONGLONG MixMonoNormal(const SWORD* srce,SLONG* dest,SLONGLONG idx,SLONGLONG increment,SLONG todo)
+{
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ }
+ return idx;
+}
+
+static SLONGLONG MixStereoNormal(const SWORD* srce,SLONG* dest,SLONGLONG idx,SLONGLONG increment,SLONG todo)
+{
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+
+ while(todo--) {
+ sample=srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ *dest++ += rvolsel * sample;
+ }
+ return idx;
+}
+
+static SLONGLONG MixSurroundNormal(const SWORD* srce,SLONG* dest,SLONGLONG idx,SLONGLONG increment,SLONG todo)
+{
+ SWORD sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+
+ if(vnf->lvolsel>=vnf->rvolsel) {
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ += lvolsel*sample;
+ *dest++ -= lvolsel*sample;
+ }
+ }
+ else {
+ while(todo--) {
+ sample = srce[idx >> FRACBITS];
+ idx += increment;
+
+ *dest++ -= rvolsel*sample;
+ *dest++ += rvolsel*sample;
+ }
+ }
+ return idx;
+}
+
+static SLONGLONG MixMonoInterp(const SWORD* srce,SLONG* dest,SLONGLONG idx,SLONGLONG increment,SLONG todo)
+{
+ SLONG sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rampvol = vnf->rampvol;
+
+ if (rampvol) {
+ SLONG oldlvol = vnf->oldlvol - lvolsel;
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += ((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ if (!--rampvol)
+ break;
+ }
+ vnf->rampvol = rampvol;
+ if (todo < 0)
+ return idx;
+ }
+
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ }
+ return idx;
+}
+
+static SLONGLONG MixStereoInterp(const SWORD* srce,SLONG* dest,SLONGLONG idx,SLONGLONG increment,SLONG todo)
+{
+ SLONG sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+ SLONG rampvol = vnf->rampvol;
+
+ if (rampvol) {
+ SLONG oldlvol = vnf->oldlvol - lvolsel;
+ SLONG oldrvol = vnf->oldrvol - rvolsel;
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ +=((lvolsel << CLICK_SHIFT) + oldlvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ *dest++ +=((rvolsel << CLICK_SHIFT) + oldrvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ if (!--rampvol)
+ break;
+ }
+ vnf->rampvol = rampvol;
+ if (todo < 0)
+ return idx;
+ }
+
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += lvolsel * sample;
+ *dest++ += rvolsel * sample;
+ }
+ return idx;
+}
+
+static SLONGLONG MixSurroundInterp(const SWORD* srce,SLONG* dest,SLONGLONG idx,SLONGLONG increment,SLONG todo)
+{
+ SLONG sample;
+ SLONG lvolsel = vnf->lvolsel;
+ SLONG rvolsel = vnf->rvolsel;
+ SLONG rampvol = vnf->rampvol;
+ SLONG oldvol, vol;
+
+ if (lvolsel >= rvolsel) {
+ vol = lvolsel;
+ oldvol = vnf->oldlvol;
+ } else {
+ vol = rvolsel;
+ oldvol = vnf->oldrvol;
+ }
+
+ if (rampvol) {
+ oldvol -= vol;
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ sample=((vol << CLICK_SHIFT) + oldvol * rampvol)
+ * sample >> CLICK_SHIFT;
+ *dest++ += sample;
+ *dest++ -= sample;
+ if (!--rampvol)
+ break;
+ }
+ vnf->rampvol = rampvol;
+ if (todo < 0)
+ return idx;
+ }
+
+ while(todo--) {
+ sample=(SLONG)srce[idx>>FRACBITS]+
+ ((SLONG)(srce[(idx>>FRACBITS)+1]-srce[idx>>FRACBITS])
+ *(idx&FRACMASK)>>FRACBITS);
+ idx += increment;
+
+ *dest++ += vol*sample;
+ *dest++ -= vol*sample;
+ }
+ return idx;
+}
+
+static void (*MixReverb)(SLONG* srce,NATIVE count);
+
+/* Reverb macros */
+#define COMPUTE_LOC(n) loc##n = RVRindex % RVc##n
+#define COMPUTE_LECHO(n) RVbufL##n [loc##n ]=speedup+((ReverbPct*RVbufL##n [loc##n ])>>7)
+#define COMPUTE_RECHO(n) RVbufR##n [loc##n ]=speedup+((ReverbPct*RVbufR##n [loc##n ])>>7)
+
+static void MixReverb_Normal(SLONG* srce,NATIVE count)
+{
+ unsigned int speedup;
+ int ReverbPct;
+ unsigned int loc1,loc2,loc3,loc4;
+ unsigned int loc5,loc6,loc7,loc8;
+
+ ReverbPct=58+(md_reverb<<2);
+
+ COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
+ COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
+
+ while(count--) {
+ /* Compute the left channel echo buffers */
+ speedup = *srce >> 3;
+
+ COMPUTE_LECHO(1); COMPUTE_LECHO(2); COMPUTE_LECHO(3); COMPUTE_LECHO(4);
+ COMPUTE_LECHO(5); COMPUTE_LECHO(6); COMPUTE_LECHO(7); COMPUTE_LECHO(8);
+
+ /* Prepare to compute actual finalized data */
+ RVRindex++;
+
+ COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
+ COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
+
+ /* left channel */
+ *srce++ +=RVbufL1[loc1]-RVbufL2[loc2]+RVbufL3[loc3]-RVbufL4[loc4]+
+ RVbufL5[loc5]-RVbufL6[loc6]+RVbufL7[loc7]-RVbufL8[loc8];
+ }
+}
+
+static void MixReverb_Stereo(SLONG* srce,NATIVE count)
+{
+ unsigned int speedup;
+ int ReverbPct;
+ unsigned int loc1, loc2, loc3, loc4;
+ unsigned int loc5, loc6, loc7, loc8;
+
+ ReverbPct = 92+(md_reverb<<1);
+
+ COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
+ COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
+
+ while(count--) {
+ /* Compute the left channel echo buffers */
+ speedup = *srce >> 3;
+
+ COMPUTE_LECHO(1); COMPUTE_LECHO(2); COMPUTE_LECHO(3); COMPUTE_LECHO(4);
+ COMPUTE_LECHO(5); COMPUTE_LECHO(6); COMPUTE_LECHO(7); COMPUTE_LECHO(8);
+
+ /* Compute the right channel echo buffers */
+ speedup = srce[1] >> 3;
+
+ COMPUTE_RECHO(1); COMPUTE_RECHO(2); COMPUTE_RECHO(3); COMPUTE_RECHO(4);
+ COMPUTE_RECHO(5); COMPUTE_RECHO(6); COMPUTE_RECHO(7); COMPUTE_RECHO(8);
+
+ /* Prepare to compute actual finalized data */
+ RVRindex++;
+
+ COMPUTE_LOC(1); COMPUTE_LOC(2); COMPUTE_LOC(3); COMPUTE_LOC(4);
+ COMPUTE_LOC(5); COMPUTE_LOC(6); COMPUTE_LOC(7); COMPUTE_LOC(8);
+
+ /* left channel then right channel */
+ *srce++ +=RVbufL1[loc1]-RVbufL2[loc2]+RVbufL3[loc3]-RVbufL4[loc4]+
+ RVbufL5[loc5]-RVbufL6[loc6]+RVbufL7[loc7]-RVbufL8[loc8];
+
+ *srce++ +=RVbufR1[loc1]-RVbufR2[loc2]+RVbufR3[loc3]-RVbufR4[loc4]+
+ RVbufR5[loc5]-RVbufR6[loc6]+RVbufR7[loc7]-RVbufR8[loc8];
+ }
+}
+
+static void (*MixLowPass)(SLONG* srce,NATIVE count);
+
+static int nLeftNR, nRightNR;
+
+static void MixLowPass_Stereo(SLONG* srce,NATIVE count)
+{
+ int n1 = nLeftNR, n2 = nRightNR;
+ SLONG *pnr = srce;
+ int nr=count;
+ for (; nr; nr--)
+ {
+ int vnr = pnr[0] >> 1;
+ pnr[0] = vnr + n1;
+ n1 = vnr;
+ vnr = pnr[1] >> 1;
+ pnr[1] = vnr + n2;
+ n2 = vnr;
+ pnr += 2;
+ }
+ nLeftNR = n1;
+ nRightNR = n2;
+}
+
+static void MixLowPass_Normal(SLONG* srce,NATIVE count)
+{
+ int n1 = nLeftNR;
+ SLONG *pnr = srce;
+ int nr=count;
+ for (; nr; nr--)
+ {
+ int vnr = pnr[0] >> 1;
+ pnr[0] = vnr + n1;
+ n1 = vnr;
+ pnr ++;
+ }
+ nLeftNR = n1;
+}
+
+/* shifting fudge factor for FP scaling, should be 0 < FP_SHIFT < BITSHIFT */
+#define FP_SHIFT 4
+
+/* Mixing macros */
+#define EXTRACT_SAMPLE_FP(var,size) var=(*srce++>>(BITSHIFT-size)) * ((1.0f / 32768.0f) / (1 << size))
+#define CHECK_SAMPLE_FP(var,bound) var=(var>bound)?bound:(var<-bound)?-bound:var
+#define PUT_SAMPLE_FP(var) *dste++=var
+
+static void Mix32ToFP(float* dste,const SLONG *srce,NATIVE count)
+{
+ float x1,x2,x3,x4;
+ int remain;
+
+ remain=count&3;
+ for(count>>=2;count;count--) {
+ EXTRACT_SAMPLE_FP(x1,FP_SHIFT); EXTRACT_SAMPLE_FP(x2,FP_SHIFT);
+ EXTRACT_SAMPLE_FP(x3,FP_SHIFT); EXTRACT_SAMPLE_FP(x4,FP_SHIFT);
+
+ CHECK_SAMPLE_FP(x1,1.0f); CHECK_SAMPLE_FP(x2,1.0f);
+ CHECK_SAMPLE_FP(x3,1.0f); CHECK_SAMPLE_FP(x4,1.0f);
+
+ PUT_SAMPLE_FP(x1); PUT_SAMPLE_FP(x2);
+ PUT_SAMPLE_FP(x3); PUT_SAMPLE_FP(x4);
+ }
+ while(remain--) {
+ EXTRACT_SAMPLE_FP(x1,FP_SHIFT);
+ CHECK_SAMPLE_FP(x1,1.0f);
+ PUT_SAMPLE_FP(x1);
+ }
+}
+
+
+/* Mixing macros */
+#define EXTRACT_SAMPLE(var,size) var=*srce++>>(BITSHIFT+16-size)
+#define CHECK_SAMPLE(var,bound) var=(var>=bound)?bound-1:(var<-bound)?-bound:var
+#define PUT_SAMPLE(var) *dste++=var
+
+static void Mix32To16(SWORD* dste,const SLONG *srce,NATIVE count)
+{
+ SLONG x1,x2,x3,x4;
+ int remain;
+
+ remain=count&3;
+ for(count>>=2;count;count--) {
+ EXTRACT_SAMPLE(x1,16); EXTRACT_SAMPLE(x2,16);
+ EXTRACT_SAMPLE(x3,16); EXTRACT_SAMPLE(x4,16);
+
+ CHECK_SAMPLE(x1,32768); CHECK_SAMPLE(x2,32768);
+ CHECK_SAMPLE(x3,32768); CHECK_SAMPLE(x4,32768);
+
+ PUT_SAMPLE(x1); PUT_SAMPLE(x2); PUT_SAMPLE(x3); PUT_SAMPLE(x4);
+ }
+ while(remain--) {
+ EXTRACT_SAMPLE(x1,16);
+ CHECK_SAMPLE(x1,32768);
+ PUT_SAMPLE(x1);
+ }
+}
+
+static void Mix32To8(SBYTE* dste,const SLONG *srce,NATIVE count)
+{
+ SWORD x1,x2,x3,x4;
+ int remain;
+
+ remain=count&3;
+ for(count>>=2;count;count--) {
+ EXTRACT_SAMPLE(x1,8); EXTRACT_SAMPLE(x2,8);
+ EXTRACT_SAMPLE(x3,8); EXTRACT_SAMPLE(x4,8);
+
+ CHECK_SAMPLE(x1,128); CHECK_SAMPLE(x2,128);
+ CHECK_SAMPLE(x3,128); CHECK_SAMPLE(x4,128);
+
+ PUT_SAMPLE(x1+128); PUT_SAMPLE(x2+128);
+ PUT_SAMPLE(x3+128); PUT_SAMPLE(x4+128);
+ }
+ while(remain--) {
+ EXTRACT_SAMPLE(x1,8);
+ CHECK_SAMPLE(x1,128);
+ PUT_SAMPLE(x1+128);
+ }
+}
+
+#if defined HAVE_ALTIVEC || defined HAVE_SSE2
+
+/* Mix 32bit input to floating point. 32 samples per iteration */
+/* PC: ?, Mac OK */
+static void Mix32ToFP_SIMD(float* dste,const SLONG* srce,NATIVE count)
+{
+ const float k = ((1.0f / 32768.0f) / (1 << FP_SHIFT));
+ int remain=count;
+ simd_m128 x1, x2, xk;
+
+ while(!IS_ALIGNED_16(dste) || !IS_ALIGNED_16(srce))
+ {
+ float xf;
+ EXTRACT_SAMPLE_FP(xf,FP_SHIFT);
+ CHECK_SAMPLE_FP(xf,1.0f);
+ PUT_SAMPLE_FP(xf);
+ count--;
+ if (!count) return;
+ }
+
+ remain = count&7;
+
+ xk = LOAD_PS1_SIMD(&k); /* Scale factor */
+
+ for(count>>=3;count;count--) {
+ EXTRACT_SAMPLE_SIMD_F(srce, x1, FP_SHIFT, xk); /* Load 4 samples */
+ EXTRACT_SAMPLE_SIMD_F(srce+4, x2, FP_SHIFT, xk); /* Load 4 samples */
+ PUT_SAMPLE_SIMD_F(dste, x1); /* Store 4 samples */
+ PUT_SAMPLE_SIMD_F(dste+4, x2); /* Store 4 samples */
+ srce+=8;
+ dste+=8;
+ }
+
+ if (remain&4) {
+ EXTRACT_SAMPLE_SIMD_F(srce, x1, FP_SHIFT, xk); /* Load 4 samples */
+ PUT_SAMPLE_SIMD_F(dste, x1); /* Store 4 samples */
+ srce+=4;
+ dste+=4;
+ remain &= 3;
+ }
+
+ while(remain--) {
+ float xf;
+ EXTRACT_SAMPLE_FP(xf,FP_SHIFT);
+ CHECK_SAMPLE_FP(xf,1.0f);
+ PUT_SAMPLE_FP(xf);
+ }
+}
+
+/* PC: Ok, Mac Ok */
+static void Mix32To16_SIMD(SWORD* dste,const SLONG* srce,NATIVE count)
+{
+ int remain = count;
+
+ while(!IS_ALIGNED_16(dste) || !IS_ALIGNED_16(srce))
+ {
+ SLONG x1;
+ EXTRACT_SAMPLE(x1,16);
+ CHECK_SAMPLE(x1,32768);
+ PUT_SAMPLE(x1);
+ count--;
+ if (!count) return;
+ }
+
+ remain = count&7;
+
+ for(count>>=3;count;count--)
+ {
+ simd_m128i x1,x2;
+ EXTRACT_SAMPLE_SIMD_16(srce, x1); /* Load 4 samples */
+ EXTRACT_SAMPLE_SIMD_16(srce+4, x2); /* Load 4 samples */
+ PUT_SAMPLE_SIMD_W(dste, x1, x2); /* Store 8 samples */
+ srce+=8;
+ dste+=8;
+ }
+
+ if (remain)
+ Mix32To16(dste, srce, remain);
+}
+
+/* Mix 32bit input to 8bit. 128 samples per iteration */
+/* PC:OK, Mac: Ok */
+static void Mix32To8_SIMD(SBYTE* dste,const SLONG* srce,NATIVE count)
+{
+ int remain=count;
+
+ while(!IS_ALIGNED_16(dste) || !IS_ALIGNED_16(srce))
+ {
+ SWORD x1;
+ EXTRACT_SAMPLE(x1,8);
+ CHECK_SAMPLE(x1,128);
+ PUT_SAMPLE(x1+128);
+ count--;
+ if (!count) return;
+ }
+
+ remain = count&15;
+
+ for(count>>=4;count;count--) {
+ simd_m128i x1,x2,x3,x4;
+ EXTRACT_SAMPLE_SIMD_8(srce, x1); /* Load 4 samples */
+ EXTRACT_SAMPLE_SIMD_8(srce+4, x2); /* Load 4 samples */
+ EXTRACT_SAMPLE_SIMD_8(srce+8, x3); /* Load 4 samples */
+ EXTRACT_SAMPLE_SIMD_8(srce+12, x4); /* Load 4 samples */
+ PUT_SAMPLE_SIMD_B(dste, x1, x2, x3, x4); /* Store 16 samples */
+ srce+=16;
+ dste+=16;
+ }
+
+ if (remain)
+ Mix32To8(dste, srce, remain);
+}
+
+#endif
+
+
+static void AddChannel(SLONG* ptr,NATIVE todo)
+{
+ SLONGLONG end,done;
+ SWORD *s;
+
+ if(!(s=Samples[vnf->handle])) {
+ vnf->current = vnf->active = 0;
+ return;
+ }
+
+ /* update the 'current' index so the sample loops, or stops playing if it
+ reached the end of the sample */
+ while(todo>0) {
+ SLONGLONG endpos;
+
+ if(vnf->flags & SF_REVERSE) {
+ /* The sample is playing in reverse */
+ if((vnf->flags&SF_LOOP)&&(vnf->current<idxlpos)) {
+ /* the sample is looping and has reached the loopstart index */
+ if(vnf->flags & SF_BIDI) {
+ /* sample is doing bidirectional loops, so 'bounce' the
+ current index against the idxlpos */
+ vnf->current = idxlpos+(idxlpos-vnf->current);
+ vnf->flags &= ~SF_REVERSE;
+ vnf->increment = -vnf->increment;
+ } else
+ /* normal backwards looping, so set the current position to
+ loopend index */
+ vnf->current=idxlend-(idxlpos-vnf->current);
+ } else {
+ /* the sample is not looping, so check if it reached index 0 */
+ if(vnf->current < 0) {
+ /* playing index reached 0, so stop playing this sample */
+ vnf->current = vnf->active = 0;
+ break;
+ }
+ }
+ } else {
+ /* The sample is playing forward */
+ if((vnf->flags & SF_LOOP) &&
+ (vnf->current >= idxlend)) {
+ /* the sample is looping, check the loopend index */
+ if(vnf->flags & SF_BIDI) {
+ /* sample is doing bidirectional loops, so 'bounce' the
+ current index against the idxlend */
+ vnf->flags |= SF_REVERSE;
+ vnf->increment = -vnf->increment;
+ vnf->current = idxlend-(vnf->current-idxlend);
+ } else
+ /* normal backwards looping, so set the current position
+ to loopend index */
+ vnf->current=idxlpos+(vnf->current-idxlend);
+ } else {
+ /* sample is not looping, so check if it reached the last
+ position */
+ if(vnf->current >= idxsize) {
+ /* yes, so stop playing this sample */
+ vnf->current = vnf->active = 0;
+ break;
+ }
+ }
+ }
+
+ end=(vnf->flags&SF_REVERSE)?(vnf->flags&SF_LOOP)?idxlpos:0:
+ (vnf->flags&SF_LOOP)?idxlend:idxsize;
+
+ /* if the sample is not blocked... */
+ if((end==vnf->current)||(!vnf->increment))
+ done=0;
+ else {
+ done=MIN((end-vnf->current)/vnf->increment+1,todo);
+ if(done<0) done=0;
+ }
+
+ if(!done) {
+ vnf->active = 0;
+ break;
+ }
+
+ endpos=vnf->current+done*vnf->increment;
+
+ if(vnf->vol) {
+#ifndef NATIVE_64BIT_INT
+ /* use the 32 bit mixers as often as we can (they're much faster) */
+ if((vnf->current<0x7fffffff)&&(endpos<0x7fffffff)) {
+ if((md_mode & DMODE_INTERP)) {
+ if(vc_mode & DMODE_STEREO) {
+ if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
+ vnf->current=Mix32SurroundInterp
+ (s,ptr,vnf->current,vnf->increment,done);
+ else
+ vnf->current=Mix32StereoInterp
+ (s,ptr,vnf->current,vnf->increment,done);
+ } else
+ vnf->current=Mix32MonoInterp
+ (s,ptr,vnf->current,vnf->increment,done);
+ } else if(vc_mode & DMODE_STEREO) {
+ if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
+ vnf->current=Mix32SurroundNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ else
+ {
+#if defined HAVE_ALTIVEC || defined HAVE_SSE2
+ if (md_mode & DMODE_SIMDMIXER)
+ vnf->current=MixSIMDStereoNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ else
+#endif
+ vnf->current=Mix32StereoNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ }
+ } else
+ vnf->current=Mix32MonoNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ }
+ else
+#endif
+ {
+ if((md_mode & DMODE_INTERP)) {
+ if(vc_mode & DMODE_STEREO) {
+ if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
+ vnf->current=MixSurroundInterp
+ (s,ptr,vnf->current,vnf->increment,done);
+ else
+ vnf->current=MixStereoInterp
+ (s,ptr,vnf->current,vnf->increment,done);
+ } else
+ vnf->current=MixMonoInterp
+ (s,ptr,vnf->current,vnf->increment,done);
+ } else if(vc_mode & DMODE_STEREO) {
+ if((vnf->pan==PAN_SURROUND)&&(md_mode&DMODE_SURROUND))
+ vnf->current=MixSurroundNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ else
+ {
+#if defined HAVE_ALTIVEC || defined HAVE_SSE2
+ if (md_mode & DMODE_SIMDMIXER)
+ vnf->current=MixSIMDStereoNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ else
+#endif
+ vnf->current=MixStereoNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ }
+ } else
+ vnf->current=MixMonoNormal
+ (s,ptr,vnf->current,vnf->increment,done);
+ }
+ } else
+ /* update sample position */
+ vnf->current=endpos;
+
+ todo-=done;
+ ptr +=(vc_mode & DMODE_STEREO)?(done<<1):done;
+ }
+}
+
+#ifdef NO_HQMIXER
+#define VC_SetupPointers() do{}while(0)
+#define VC1_Init VC_Init
+#define VC1_Exit VC_Exit
+#define VC1_PlayStart VC_PlayStart
+#define VC1_PlayStop VC_PlayStop
+#define VC1_SampleLength VC_SampleLength
+#define VC1_SampleSpace VC_SampleSpace
+#define VC1_SampleLoad VC_SampleLoad
+#define VC1_SampleUnload VC_SampleUnload
+#define VC1_SetNumVoices VC_SetNumVoices
+#define VC1_SilenceBytes VC_SilenceBytes
+#define VC1_VoicePlay VC_VoicePlay
+#define VC1_VoiceStop VC_VoiceStop
+#define VC1_VoiceGetFrequency VC_VoiceGetFrequency
+#define VC1_VoiceGetPanning VC_VoiceGetPanning
+#define VC1_VoiceGetPosition VC_VoiceGetPosition
+#define VC1_VoiceGetVolume VC_VoiceGetVolume
+#define VC1_VoiceRealVolume VC_VoiceRealVolume
+#define VC1_VoiceSetFrequency VC_VoiceSetFrequency
+#define VC1_VoiceSetPanning VC_VoiceSetPanning
+#define VC1_VoiceSetVolume VC_VoiceSetVolume
+#define VC1_VoiceStopped VC_VoiceStopped
+#define VC1_WriteBytes VC_WriteBytes
+#define VC1_WriteSamples VC_WriteSamples
+#endif
+
+#define _IN_VIRTCH_
+#include "virtch_common.c"
+#undef _IN_VIRTCH_
+
+void VC1_WriteSamples(SBYTE* buf,ULONG todo)
+{
+ int left,portion=0,count;
+ SBYTE *buffer;
+ int t, pan, vol;
+
+ while(todo) {
+ if(!tickleft) {
+ if(vc_mode & DMODE_SOFT_MUSIC) md_player();
+ tickleft=(md_mixfreq*125L)/(md_bpm*50L);
+ }
+ left = MIN(tickleft, todo);
+ buffer = buf;
+ tickleft -= left;
+ todo -= left;
+ buf += samples2bytes(left);
+
+ while(left) {
+ portion = MIN(left, samplesthatfit);
+ count = (vc_mode & DMODE_STEREO)?(portion<<1):portion;
+ memset(vc_tickbuf, 0, count<<2);
+ for(t=0;t<vc_softchn;t++) {
+ vnf = &vinf[t];
+
+ if(vnf->kick) {
+ vnf->current=((SLONGLONG)vnf->start)<<FRACBITS;
+ vnf->kick =0;
+ vnf->active =1;
+ }
+
+ if(!vnf->frq) vnf->active = 0;
+
+ if(vnf->active) {
+ vnf->increment=((SLONGLONG)(vnf->frq<<FRACBITS))/md_mixfreq;
+ if(vnf->flags&SF_REVERSE) vnf->increment=-vnf->increment;
+ vol = vnf->vol; pan = vnf->pan;
+
+ vnf->oldlvol=vnf->lvolsel;vnf->oldrvol=vnf->rvolsel;
+ if(vc_mode & DMODE_STEREO) {
+ if(pan != PAN_SURROUND) {
+ vnf->lvolsel=(vol*(PAN_RIGHT-pan))>>8;
+ vnf->rvolsel=(vol*pan)>>8;
+ } else
+ vnf->lvolsel=vnf->rvolsel=vol/2;
+ } else
+ vnf->lvolsel=vol;
+
+ idxsize = (vnf->size)? ((SLONGLONG)vnf->size << FRACBITS)-1 : 0;
+ idxlend = (vnf->repend)? ((SLONGLONG)vnf->repend << FRACBITS)-1 : 0;
+ idxlpos = (SLONGLONG)vnf->reppos << FRACBITS;
+ AddChannel(vc_tickbuf, portion);
+ }
+ }
+
+ if(md_mode & DMODE_NOISEREDUCTION) {
+ MixLowPass(vc_tickbuf, portion);
+ }
+
+ if(md_reverb) {
+ if(md_reverb>15) md_reverb=15;
+ MixReverb(vc_tickbuf, portion);
+ }
+
+ if (vc_callback) {
+ vc_callback((unsigned char*)vc_tickbuf, portion);
+ }
+
+#if defined HAVE_ALTIVEC || defined HAVE_SSE2
+ if (md_mode & DMODE_SIMDMIXER)
+ {
+ if(vc_mode & DMODE_FLOAT)
+ Mix32ToFP_SIMD((float*) buffer, vc_tickbuf, count);
+ else if(vc_mode & DMODE_16BITS)
+ Mix32To16_SIMD((SWORD*) buffer, vc_tickbuf, count);
+ else
+ Mix32To8_SIMD((SBYTE*) buffer, vc_tickbuf, count);
+ }
+ else
+#endif
+ {
+ if(vc_mode & DMODE_FLOAT)
+ Mix32ToFP((float*) buffer, vc_tickbuf, count);
+ else if(vc_mode & DMODE_16BITS)
+ Mix32To16((SWORD*) buffer, vc_tickbuf, count);
+ else
+ Mix32To8((SBYTE*) buffer, vc_tickbuf, count);
+ }
+ buffer += samples2bytes(portion);
+ left -= portion;
+ }
+ }
+}
+
+int VC1_Init(void)
+{
+#ifndef NO_HQMIXER
+ VC_SetupPointers();
+
+ if (md_mode&DMODE_HQMIXER)
+ return VC2_Init();
+#endif
+
+ if(!(Samples=(SWORD**)MikMod_amalloc(MAXSAMPLEHANDLES*sizeof(SWORD*)))) {
+ _mm_errno = MMERR_INITIALIZING_MIXER;
+ return 1;
+ }
+ if(!vc_tickbuf) {
+ if(!(vc_tickbuf=(SLONG*)MikMod_amalloc((TICKLSIZE+32)*sizeof(SLONG)))) {
+ _mm_errno = MMERR_INITIALIZING_MIXER;
+ return 1;
+ }
+ }
+
+ MixReverb=(md_mode&DMODE_STEREO)?MixReverb_Stereo:MixReverb_Normal;
+ MixLowPass=(md_mode&DMODE_STEREO)?MixLowPass_Stereo:MixLowPass_Normal;
+ vc_mode = md_mode;
+ return 0;
+}
+
+int VC1_PlayStart(void)
+{
+ samplesthatfit=TICKLSIZE;
+ if(vc_mode & DMODE_STEREO) samplesthatfit >>= 1;
+ tickleft = 0;
+
+ RVc1 = (5000L * md_mixfreq) / REVERBERATION;
+ RVc2 = (5078L * md_mixfreq) / REVERBERATION;
+ RVc3 = (5313L * md_mixfreq) / REVERBERATION;
+ RVc4 = (5703L * md_mixfreq) / REVERBERATION;
+ RVc5 = (6250L * md_mixfreq) / REVERBERATION;
+ RVc6 = (6953L * md_mixfreq) / REVERBERATION;
+ RVc7 = (7813L * md_mixfreq) / REVERBERATION;
+ RVc8 = (8828L * md_mixfreq) / REVERBERATION;
+
+ if(!(RVbufL1=(SLONG*)MikMod_calloc((RVc1+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL2=(SLONG*)MikMod_calloc((RVc2+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL3=(SLONG*)MikMod_calloc((RVc3+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL4=(SLONG*)MikMod_calloc((RVc4+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL5=(SLONG*)MikMod_calloc((RVc5+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL6=(SLONG*)MikMod_calloc((RVc6+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL7=(SLONG*)MikMod_calloc((RVc7+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufL8=(SLONG*)MikMod_calloc((RVc8+1),sizeof(SLONG)))) return 1;
+
+ /* allocate reverb buffers for the right channel if in stereo mode only. */
+ if (vc_mode & DMODE_STEREO) {
+ if(!(RVbufR1=(SLONG*)MikMod_calloc((RVc1+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR2=(SLONG*)MikMod_calloc((RVc2+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR3=(SLONG*)MikMod_calloc((RVc3+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR4=(SLONG*)MikMod_calloc((RVc4+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR5=(SLONG*)MikMod_calloc((RVc5+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR6=(SLONG*)MikMod_calloc((RVc6+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR7=(SLONG*)MikMod_calloc((RVc7+1),sizeof(SLONG)))) return 1;
+ if(!(RVbufR8=(SLONG*)MikMod_calloc((RVc8+1),sizeof(SLONG)))) return 1;
+ }
+
+ RVRindex = 0;
+ return 0;
+}
+
+void VC1_PlayStop(void)
+{
+ MikMod_free(RVbufL1);
+ MikMod_free(RVbufL2);
+ MikMod_free(RVbufL3);
+ MikMod_free(RVbufL4);
+ MikMod_free(RVbufL5);
+ MikMod_free(RVbufL6);
+ MikMod_free(RVbufL7);
+ MikMod_free(RVbufL8);
+ RVbufL1=RVbufL2=RVbufL3=RVbufL4=RVbufL5=RVbufL6=RVbufL7=RVbufL8=NULL;
+ MikMod_free(RVbufR1);
+ MikMod_free(RVbufR2);
+ MikMod_free(RVbufR3);
+ MikMod_free(RVbufR4);
+ MikMod_free(RVbufR5);
+ MikMod_free(RVbufR6);
+ MikMod_free(RVbufR7);
+ MikMod_free(RVbufR8);
+ RVbufR1=RVbufR2=RVbufR3=RVbufR4=RVbufR5=RVbufR6=RVbufR7=RVbufR8=NULL;
+}
+
+int VC1_SetNumVoices(void)
+{
+ int t;
+
+ if(!(vc_softchn=md_softchn)) return 0;
+
+ MikMod_free(vinf);
+ if(!(vinf=(VINFO*)MikMod_calloc(vc_softchn,sizeof(VINFO)))) return 1;
+
+ for(t=0;t<vc_softchn;t++) {
+ vinf[t].frq=10000;
+ vinf[t].pan=(t&1)?PAN_LEFT:PAN_RIGHT;
+ }
+
+ return 0;
+}
+
+/* ex:set ts=4: */
projects / dosdemo / blobdiff