virtch2.c
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上传日期:2014-04-03
资源大小:7248k
文件大小:26k
源码类别:
Windows CE
开发平台:
C/C++
- /* MikMod sound library
- (c) 1998, 1999, 2000 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: virtch2.c,v 1.2 2004/02/13 13:31:54 raph Exp $
- High-quality sample mixing routines, using a 32 bits mixing buffer,
- interpolation, and sample smoothing to improve sound quality and remove
- clicks.
- ==============================================================================*/
- /*
- Future Additions:
- Low-Pass filter to remove annoying staticy buzz.
- */
- #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
- ====================
- MAXVOL_FACTOR (was BITSHIFT in virtch.c)
- Controls the maximum volume of the output data. All mixed data is
- divided by this number after mixing, so larger numbers result in
- quieter mixing. Smaller numbers will increase the likeliness of
- distortion on loud modules.
- REVERBERATION
- Larger numbers result in shorter reverb duration. Longer reverb
- durations can cause unwanted static and make the reverb sound more
- like a crappy echo.
- SAMPLING_SHIFT
- Specified the shift multiplier which controls by how much the mixing
- rate is multiplied while mixing. Higher values can improve quality by
- smoothing the sound and reducing pops and clicks. Note, this is a shift
- value, so a value of 2 becomes a mixing-rate multiplier of 4, and a
- value of 3 = 8, etc.
- FRACBITS
- The number of bits per integer devoted to the fractional part of the
- number. Generally, this number should not be changed for any reason.
- !!! IMPORTANT !!! All values below MUST ALWAYS be greater than 0
- */
- #define MAXVOL_FACTOR (1<<9)
- #define REVERBERATION 11000L
- #define SAMPLING_SHIFT 2
- #define SAMPLING_FACTOR (1UL<<SAMPLING_SHIFT)
- #define FRACBITS 28
- #define FRACMASK ((1UL<<FRACBITS)-1UL)
- #define TICKLSIZE 8192
- #define TICKWSIZE (TICKLSIZE * 2)
- #define TICKBSIZE (TICKWSIZE * 2)
- #define CLICK_SHIFT_BASE 6
- #define CLICK_SHIFT (CLICK_SHIFT_BASE + SAMPLING_SHIFT)
- #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 click;
- int rampvol;
- SLONG lastvalL,lastvalR;
- 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
- /*========== 32 bit sample mixers - only for 32 bit platforms */
- #ifndef NATIVE_64BIT_INT
- static SLONG Mix32MonoNormal(SWORD* srce,SLONG* dest,SLONG index,SLONG increment,SLONG todo)
- {
- SWORD sample=0;
- SLONG i,f;
- while(todo--) {
- i=index>>FRACBITS,f=index&FRACMASK;
- sample=(((SLONG)(srce[i]*(FRACMASK+1L-f)) +
- ((SLONG)srce[i+1]*f)) >> FRACBITS);
- index+=increment;
- if(vnf->rampvol) {
- *dest++ += (long)(
- ( ( (SLONG)(vnf->oldlvol*vnf->rampvol) +
- (vnf->lvolsel*(CLICK_BUFFER-vnf->rampvol)) ) *
- (SLONG)sample ) >> CLICK_SHIFT );
- vnf->rampvol--;
- } else
- if(vnf->click) {
- *dest++ += (long)(
- ( ( ((SLONG)vnf->lvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONG)sample ) +
- (vnf->lastvalL*vnf->click) ) >> CLICK_SHIFT );
- vnf->click--;
- } else
- *dest++ +=vnf->lvolsel*sample;
- }
- vnf->lastvalL=vnf->lvolsel * sample;
- return index;
- }
- static SLONG Mix32StereoNormal(SWORD* srce,SLONG* dest,SLONG index,SLONG increment,ULONG todo)
- {
- SWORD sample=0;
- SLONG i,f;
- while(todo--) {
- i=index>>FRACBITS,f=index&FRACMASK;
- sample=((((SLONG)srce[i]*(FRACMASK+1L-f)) +
- ((SLONG)srce[i+1] * f)) >> FRACBITS);
- index += increment;
- if(vnf->rampvol) {
- *dest++ += (long)(
- ( ( ((SLONG)vnf->oldlvol*vnf->rampvol) +
- (vnf->lvolsel*(CLICK_BUFFER-vnf->rampvol))
- ) * (SLONG)sample ) >> CLICK_SHIFT );
- *dest++ += (long)(
- ( ( ((SLONG)vnf->oldrvol*vnf->rampvol) +
- (vnf->rvolsel*(CLICK_BUFFER-vnf->rampvol))
- ) * (SLONG)sample ) >> CLICK_SHIFT );
- vnf->rampvol--;
- } else
- if(vnf->click) {
- *dest++ += (long)(
- ( ( (SLONG)(vnf->lvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONG)sample ) + (vnf->lastvalL * vnf->click) )
- >> CLICK_SHIFT );
- *dest++ += (long)(
- ( ( ((SLONG)vnf->rvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONG)sample ) + (vnf->lastvalR * vnf->click) )
- >> CLICK_SHIFT );
- vnf->click--;
- } else {
- *dest++ +=vnf->lvolsel*sample;
- *dest++ +=vnf->rvolsel*sample;
- }
- }
- vnf->lastvalL=vnf->lvolsel*sample;
- vnf->lastvalR=vnf->rvolsel*sample;
- return index;
- }
- static SLONG Mix32StereoSurround(SWORD* srce,SLONG* dest,SLONG index,SLONG increment,ULONG todo)
- {
- SWORD sample=0;
- long whoop;
- SLONG i, f;
- while(todo--) {
- i=index>>FRACBITS,f=index&FRACMASK;
- sample=((((SLONG)srce[i]*(FRACMASK+1L-f)) +
- ((SLONG)srce[i+1]*f)) >> FRACBITS);
- index+=increment;
- if(vnf->rampvol) {
- whoop=(long)(
- ( ( (SLONG)(vnf->oldlvol*vnf->rampvol) +
- (vnf->lvolsel*(CLICK_BUFFER-vnf->rampvol)) ) *
- (SLONG)sample) >> CLICK_SHIFT );
- *dest++ +=whoop;
- *dest++ -=whoop;
- vnf->rampvol--;
- } else
- if(vnf->click) {
- whoop = (long)(
- ( ( ((SLONG)vnf->lvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONG)sample) +
- (vnf->lastvalL * vnf->click) ) >> CLICK_SHIFT );
- *dest++ +=whoop;
- *dest++ -=whoop;
- vnf->click--;
- } else {
- *dest++ +=vnf->lvolsel*sample;
- *dest++ -=vnf->lvolsel*sample;
- }
- }
- vnf->lastvalL=vnf->lvolsel*sample;
- vnf->lastvalR=vnf->lvolsel*sample;
- return index;
- }
- #endif
- /*========== 64 bit mixers */
- static SLONGLONG MixMonoNormal(SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,SLONG todo)
- {
- SWORD sample=0;
- SLONGLONG i,f;
- while(todo--) {
- i=index>>FRACBITS,f=index&FRACMASK;
- sample=(((SLONGLONG)(srce[i]*(FRACMASK+1L-f)) +
- ((SLONGLONG)srce[i+1]*f)) >> FRACBITS);
- index+=increment;
- if(vnf->rampvol) {
- *dest++ += (long)(
- ( ( (SLONGLONG)(vnf->oldlvol*vnf->rampvol) +
- (vnf->lvolsel*(CLICK_BUFFER-vnf->rampvol)) ) *
- (SLONGLONG)sample ) >> CLICK_SHIFT );
- vnf->rampvol--;
- } else
- if(vnf->click) {
- *dest++ += (long)(
- ( ( ((SLONGLONG)vnf->lvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONGLONG)sample ) +
- (vnf->lastvalL*vnf->click) ) >> CLICK_SHIFT );
- vnf->click--;
- } else
- *dest++ +=vnf->lvolsel*sample;
- }
- vnf->lastvalL=vnf->lvolsel * sample;
- return index;
- }
- static SLONGLONG MixStereoNormal(SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,ULONG todo)
- {
- SWORD sample=0;
- SLONGLONG i,f;
- while(todo--) {
- i=index>>FRACBITS,f=index&FRACMASK;
- sample=((((SLONGLONG)srce[i]*(FRACMASK+1L-f)) +
- ((SLONGLONG)srce[i+1] * f)) >> FRACBITS);
- index += increment;
- if(vnf->rampvol) {
- *dest++ += (long)(
- ( ( ((SLONGLONG)vnf->oldlvol*vnf->rampvol) +
- (vnf->lvolsel*(CLICK_BUFFER-vnf->rampvol))
- ) * (SLONGLONG)sample ) >> CLICK_SHIFT );
- *dest++ += (long)(
- ( ( ((SLONGLONG)vnf->oldrvol*vnf->rampvol) +
- (vnf->rvolsel*(CLICK_BUFFER-vnf->rampvol))
- ) * (SLONGLONG)sample ) >> CLICK_SHIFT );
- vnf->rampvol--;
- } else
- if(vnf->click) {
- *dest++ += (long)(
- ( ( (SLONGLONG)(vnf->lvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONGLONG)sample ) + (vnf->lastvalL * vnf->click) )
- >> CLICK_SHIFT );
- *dest++ += (long)(
- ( ( ((SLONGLONG)vnf->rvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONGLONG)sample ) + (vnf->lastvalR * vnf->click) )
- >> CLICK_SHIFT );
- vnf->click--;
- } else {
- *dest++ +=vnf->lvolsel*sample;
- *dest++ +=vnf->rvolsel*sample;
- }
- }
- vnf->lastvalL=vnf->lvolsel*sample;
- vnf->lastvalR=vnf->rvolsel*sample;
- return index;
- }
- static SLONGLONG MixStereoSurround(SWORD* srce,SLONG* dest,SLONGLONG index,SLONGLONG increment,ULONG todo)
- {
- SWORD sample=0;
- long whoop;
- SLONGLONG i, f;
- while(todo--) {
- i=index>>FRACBITS,f=index&FRACMASK;
- sample=((((SLONGLONG)srce[i]*(FRACMASK+1L-f)) +
- ((SLONGLONG)srce[i+1]*f)) >> FRACBITS);
- index+=increment;
- if(vnf->rampvol) {
- whoop=(long)(
- ( ( (SLONGLONG)(vnf->oldlvol*vnf->rampvol) +
- (vnf->lvolsel*(CLICK_BUFFER-vnf->rampvol)) ) *
- (SLONGLONG)sample) >> CLICK_SHIFT );
- *dest++ +=whoop;
- *dest++ -=whoop;
- vnf->rampvol--;
- } else
- if(vnf->click) {
- whoop = (long)(
- ( ( ((SLONGLONG)vnf->lvolsel*(CLICK_BUFFER-vnf->click)) *
- (SLONGLONG)sample) +
- (vnf->lastvalL * vnf->click) ) >> CLICK_SHIFT );
- *dest++ +=whoop;
- *dest++ -=whoop;
- vnf->click--;
- } else {
- *dest++ +=vnf->lvolsel*sample;
- *dest++ -=vnf->lvolsel*sample;
- }
- }
- vnf->lastvalL=vnf->lvolsel*sample;
- vnf->lastvalR=vnf->lvolsel*sample;
- return index;
- }
- static void(*Mix32toFP)(float* dste,SLONG* srce,NATIVE count);
- static void(*Mix32to16)(SWORD* dste,SLONG* srce,NATIVE count);
- static void(*Mix32to8)(SBYTE* dste,SLONG* srce,NATIVE count);
- 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)
- {
- NATIVE speedup;
- int ReverbPct;
- unsigned int loc1,loc2,loc3,loc4,loc5,loc6,loc7,loc8;
- ReverbPct=58+(md_reverb*4);
- 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)
- {
- NATIVE speedup;
- int ReverbPct;
- unsigned int loc1,loc2,loc3,loc4,loc5,loc6,loc7,loc8;
- ReverbPct=58+(md_reverb*4);
- 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 */
- *srce++ +=RVbufL1[loc1]-RVbufL2[loc2]+RVbufL3[loc3]-RVbufL4[loc4]+
- RVbufL5[loc5]-RVbufL6[loc6]+RVbufL7[loc7]-RVbufL8[loc8];
- /* right channel */
- *srce++ +=RVbufR1[loc1]-RVbufR2[loc2]+RVbufR3[loc3]-RVbufR4[loc4]+
- RVbufR5[loc5]-RVbufR6[loc6]+RVbufR7[loc7]-RVbufR8[loc8];
- }
- }
- /* Mixing macros */
- #define EXTRACT_SAMPLE_FP(var,attenuation) var=*srce++*((1.0f / 32768.0f) / (MAXVOL_FACTOR*attenuation))
- #define CHECK_SAMPLE_FP(var,bound) var=(var>bound)?bound:(var<-bound)?-bound:var
- static void Mix32ToFP_Normal(float* dste,SLONG* srce,NATIVE count)
- {
- float x1,x2,tmpx;
- int i;
- for(count/=SAMPLING_FACTOR;count;count--) {
- tmpx=0.0f;
- for(i=SAMPLING_FACTOR/2;i;i--) {
- EXTRACT_SAMPLE_FP(x1,1.0f); EXTRACT_SAMPLE_FP(x2,1.0f);
- CHECK_SAMPLE_FP(x1,1.0f); CHECK_SAMPLE_FP(x2,1.0f);
- tmpx+=x1+x2;
- }
- *dste++ =tmpx*(1.0f/SAMPLING_FACTOR);
- }
- }
- static void Mix32ToFP_Stereo(float* dste,SLONG* srce,NATIVE count)
- {
- float x1,x2,x3,x4,tmpx,tmpy;
- int i;
- for(count/=SAMPLING_FACTOR;count;count--) {
- tmpx=tmpy=0.0f;
- for(i=SAMPLING_FACTOR/2;i;i--) {
- EXTRACT_SAMPLE_FP(x1,1.0f); EXTRACT_SAMPLE_FP(x2,1.0f);
- EXTRACT_SAMPLE_FP(x3,1.0f); EXTRACT_SAMPLE_FP(x4,1.0f);
- CHECK_SAMPLE_FP(x1,1.0f); CHECK_SAMPLE_FP(x2,1.0f);
- CHECK_SAMPLE_FP(x3,1.0f); CHECK_SAMPLE_FP(x4,1.0f);
- tmpx+=x1+x3;
- tmpy+=x2+x4;
- }
- *dste++ =tmpx*(1.0f/SAMPLING_FACTOR);
- *dste++ =tmpy*(1.0f/SAMPLING_FACTOR);
- }
- }
- /* Mixing macros */
- #define EXTRACT_SAMPLE(var,attenuation) var=*srce++/(MAXVOL_FACTOR*attenuation)
- #define CHECK_SAMPLE(var,bound) var=(var>=bound)?bound-1:(var<-bound)?-bound:var
- static void Mix32To16_Normal(SWORD* dste,SLONG* srce,NATIVE count)
- {
- NATIVE x1,x2,tmpx;
- int i;
- for(count/=SAMPLING_FACTOR;count;count--) {
- tmpx=0;
- for(i=SAMPLING_FACTOR/2;i;i--) {
- EXTRACT_SAMPLE(x1,1); EXTRACT_SAMPLE(x2,1);
- CHECK_SAMPLE(x1,32768); CHECK_SAMPLE(x2,32768);
- tmpx+=x1+x2;
- }
- *dste++ =tmpx/SAMPLING_FACTOR;
- }
- }
- static void Mix32To16_Stereo(SWORD* dste,SLONG* srce,NATIVE count)
- {
- NATIVE x1,x2,x3,x4,tmpx,tmpy;
- int i;
- for(count/=SAMPLING_FACTOR;count;count--) {
- tmpx=tmpy=0;
- for(i=SAMPLING_FACTOR/2;i;i--) {
- EXTRACT_SAMPLE(x1,1); EXTRACT_SAMPLE(x2,1);
- EXTRACT_SAMPLE(x3,1); EXTRACT_SAMPLE(x4,1);
- CHECK_SAMPLE(x1,32768); CHECK_SAMPLE(x2,32768);
- CHECK_SAMPLE(x3,32768); CHECK_SAMPLE(x4,32768);
- tmpx+=x1+x3;
- tmpy+=x2+x4;
- }
- *dste++ =tmpx/SAMPLING_FACTOR;
- *dste++ =tmpy/SAMPLING_FACTOR;
- }
- }
- static void Mix32To8_Normal(SBYTE* dste,SLONG* srce,NATIVE count)
- {
- NATIVE x1,x2,tmpx;
- int i;
- for(count/=SAMPLING_FACTOR;count;count--) {
- tmpx = 0;
- for(i=SAMPLING_FACTOR/2;i;i--) {
- EXTRACT_SAMPLE(x1,256); EXTRACT_SAMPLE(x2,256);
- CHECK_SAMPLE(x1,128); CHECK_SAMPLE(x2,128);
- tmpx+=x1+x2;
- }
- *dste++ =(tmpx/SAMPLING_FACTOR)+128;
- }
- }
- static void Mix32To8_Stereo(SBYTE* dste,SLONG* srce,NATIVE count)
- {
- NATIVE x1,x2,x3,x4,tmpx,tmpy;
- int i;
- for(count/=SAMPLING_FACTOR;count;count--) {
- tmpx=tmpy=0;
- for(i=SAMPLING_FACTOR/2;i;i--) {
- EXTRACT_SAMPLE(x1,256); EXTRACT_SAMPLE(x2,256);
- EXTRACT_SAMPLE(x3,256); EXTRACT_SAMPLE(x4,256);
- CHECK_SAMPLE(x1,128); CHECK_SAMPLE(x2,128);
- CHECK_SAMPLE(x3,128); CHECK_SAMPLE(x4,128);
- tmpx+=x1+x3;
- tmpy+=x2+x4;
- }
- *dste++ =(tmpx/SAMPLING_FACTOR)+128;
- *dste++ =(tmpy/SAMPLING_FACTOR)+128;
- }
- }
- static void AddChannel(SLONG* ptr,NATIVE todo)
- {
- SLONGLONG end,done;
- SWORD *s;
- if(!(s=Samples[vnf->handle])) {
- vnf->current = vnf->active = 0;
- vnf->lastvalL = vnf->lastvalR = 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 || vnf->rampvol) {
- #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(vc_mode & DMODE_STEREO) {
- if((vnf->pan==PAN_SURROUND)&&(vc_mode&DMODE_SURROUND))
- vnf->current=Mix32StereoSurround
- (s,ptr,vnf->current,vnf->increment,done);
- else
- vnf->current=Mix32StereoNormal
- (s,ptr,vnf->current,vnf->increment,done);
- } else
- vnf->current=Mix32MonoNormal
- (s,ptr,vnf->current,vnf->increment,done);
- } else
- #endif
- {
- if(vc_mode & DMODE_STEREO) {
- if((vnf->pan==PAN_SURROUND)&&(vc_mode&DMODE_SURROUND))
- vnf->current=MixStereoSurround
- (s,ptr,vnf->current,vnf->increment,done);
- else
- vnf->current=MixStereoNormal
- (s,ptr,vnf->current,vnf->increment,done);
- } else
- vnf->current=MixMonoNormal
- (s,ptr,vnf->current,vnf->increment,done);
- }
- } else {
- vnf->lastvalL = vnf->lastvalR = 0;
- /* update sample position */
- vnf->current=endpos;
- }
- todo -= done;
- ptr +=(vc_mode & DMODE_STEREO)?(done<<1):done;
- }
- }
- #define _IN_VIRTCH_
- #define VC1_SilenceBytes VC2_SilenceBytes
- #define VC1_WriteSamples VC2_WriteSamples
- #define VC1_WriteBytes VC2_WriteBytes
- #define VC1_Exit VC2_Exit
- #define VC1_VoiceSetVolume VC2_VoiceSetVolume
- #define VC1_VoiceGetVolume VC2_VoiceGetVolume
- #define VC1_VoiceSetPanning VC2_VoiceSetPanning
- #define VC1_VoiceGetPanning VC2_VoiceGetPanning
- #define VC1_VoiceSetFrequency VC2_VoiceSetFrequency
- #define VC1_VoiceGetFrequency VC2_VoiceGetFrequency
- #define VC1_VoicePlay VC2_VoicePlay
- #define VC1_VoiceStop VC2_VoiceStop
- #define VC1_VoiceStopped VC2_VoiceStopped
- #define VC1_VoiceGetPosition VC2_VoiceGetPosition
- #define VC1_SampleUnload VC2_SampleUnload
- #define VC1_SampleLoad VC2_SampleLoad
- #define VC1_SampleSpace VC2_SampleSpace
- #define VC1_SampleLength VC2_SampleLength
- #define VC1_VoiceRealVolume VC2_VoiceRealVolume
- #include "virtch_common.c"
- #undef _IN_VIRTCH_
- void VC2_WriteSamples(SBYTE* buf,ULONG todo)
- {
- int left,portion=0;
- SBYTE *buffer;
- int t,pan,vol;
- todo*=SAMPLING_FACTOR;
- while(todo) {
- if(!tickleft) {
- if(vc_mode & DMODE_SOFT_MUSIC) md_player();
- tickleft=(md_mixfreq*125L*SAMPLING_FACTOR)/(md_bpm*50L);
- tickleft&=~(SAMPLING_FACTOR-1);
- }
- left = MIN(tickleft, todo);
- buffer = buf;
- tickleft -= left;
- todo -= left;
- buf += samples2bytes(left)/SAMPLING_FACTOR;
- while(left) {
- portion = MIN(left, samplesthatfit);
- memset(vc_tickbuf,0,portion<<((vc_mode&DMODE_STEREO)?3:2));
- 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;
- vnf->click = CLICK_BUFFER;
- vnf->rampvol = 0;
- }
- if(!vnf->frq) vnf->active = 0;
- if(vnf->active) {
- vnf->increment=((SLONGLONG)(vnf->frq)<<(FRACBITS-SAMPLING_SHIFT))
- /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 * 256L) / 480;
- }
- } 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_reverb) {
- if(md_reverb>15) md_reverb=15;
- MixReverb(vc_tickbuf,portion);
- }
- if(vc_mode & DMODE_FLOAT)
- Mix32toFP((float*)buffer,vc_tickbuf,portion);
- else if(vc_mode & DMODE_16BITS)
- Mix32to16((SWORD*)buffer,vc_tickbuf,portion);
- else
- Mix32to8((SBYTE*)buffer,vc_tickbuf,portion);
- buffer += samples2bytes(portion) / SAMPLING_FACTOR;
- left -= portion;
- }
- }
- }
- BOOL VC2_Init(void)
- {
- VC_SetupPointers();
- if (!(md_mode&DMODE_HQMIXER))
- return VC1_Init();
- if(!(Samples=(SWORD**)_mm_calloc(MAXSAMPLEHANDLES,sizeof(SWORD*)))) {
- _mm_errno = MMERR_INITIALIZING_MIXER;
- return 1;
- }
- if(!vc_tickbuf)
- if(!(vc_tickbuf=(SLONG*)_mm_malloc((TICKLSIZE+32)*sizeof(SLONG)))) {
- _mm_errno = MMERR_INITIALIZING_MIXER;
- return 1;
- }
- if(md_mode & DMODE_STEREO) {
- Mix32toFP = Mix32ToFP_Stereo;
- Mix32to16 = Mix32To16_Stereo;
- Mix32to8 = Mix32To8_Stereo;
- MixReverb = MixReverb_Stereo;
- } else {
- Mix32toFP = Mix32ToFP_Normal;
- Mix32to16 = Mix32To16_Normal;
- Mix32to8 = Mix32To8_Normal;
- MixReverb = MixReverb_Normal;
- }
- md_mode |= DMODE_INTERP;
- vc_mode = md_mode;
- return 0;
- }
- BOOL VC2_PlayStart(void)
- {
- md_mode|=DMODE_INTERP;
- samplesthatfit = TICKLSIZE;
- if(vc_mode & DMODE_STEREO) samplesthatfit >>= 1;
- tickleft = 0;
- RVc1 = (5000L * md_mixfreq) / (REVERBERATION * 10);
- RVc2 = (5078L * md_mixfreq) / (REVERBERATION * 10);
- RVc3 = (5313L * md_mixfreq) / (REVERBERATION * 10);
- RVc4 = (5703L * md_mixfreq) / (REVERBERATION * 10);
- RVc5 = (6250L * md_mixfreq) / (REVERBERATION * 10);
- RVc6 = (6953L * md_mixfreq) / (REVERBERATION * 10);
- RVc7 = (7813L * md_mixfreq) / (REVERBERATION * 10);
- RVc8 = (8828L * md_mixfreq) / (REVERBERATION * 10);
- if(!(RVbufL1=(SLONG*)_mm_calloc((RVc1+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL2=(SLONG*)_mm_calloc((RVc2+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL3=(SLONG*)_mm_calloc((RVc3+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL4=(SLONG*)_mm_calloc((RVc4+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL5=(SLONG*)_mm_calloc((RVc5+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL6=(SLONG*)_mm_calloc((RVc6+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL7=(SLONG*)_mm_calloc((RVc7+1),sizeof(SLONG)))) return 1;
- if(!(RVbufL8=(SLONG*)_mm_calloc((RVc8+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR1=(SLONG*)_mm_calloc((RVc1+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR2=(SLONG*)_mm_calloc((RVc2+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR3=(SLONG*)_mm_calloc((RVc3+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR4=(SLONG*)_mm_calloc((RVc4+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR5=(SLONG*)_mm_calloc((RVc5+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR6=(SLONG*)_mm_calloc((RVc6+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR7=(SLONG*)_mm_calloc((RVc7+1),sizeof(SLONG)))) return 1;
- if(!(RVbufR8=(SLONG*)_mm_calloc((RVc8+1),sizeof(SLONG)))) return 1;
- RVRindex = 0;
- return 0;
- }
- void VC2_PlayStop(void)
- {
- if(RVbufL1) free(RVbufL1);
- if(RVbufL2) free(RVbufL2);
- if(RVbufL3) free(RVbufL3);
- if(RVbufL4) free(RVbufL4);
- if(RVbufL5) free(RVbufL5);
- if(RVbufL6) free(RVbufL6);
- if(RVbufL7) free(RVbufL7);
- if(RVbufL8) free(RVbufL8);
- if(RVbufR1) free(RVbufR1);
- if(RVbufR2) free(RVbufR2);
- if(RVbufR3) free(RVbufR3);
- if(RVbufR4) free(RVbufR4);
- if(RVbufR5) free(RVbufR5);
- if(RVbufR6) free(RVbufR6);
- if(RVbufR7) free(RVbufR7);
- if(RVbufR8) free(RVbufR8);
- RVbufL1=RVbufL2=RVbufL3=RVbufL4=RVbufL5=RVbufL6=RVbufL7=RVbufL8=NULL;
- RVbufR1=RVbufR2=RVbufR3=RVbufR4=RVbufR5=RVbufR6=RVbufR7=RVbufR8=NULL;
- }
- BOOL VC2_SetNumVoices(void)
- {
- int t;
- md_mode|=DMODE_INTERP;
- if(!(vc_softchn=md_softchn)) return 0;
- if(vinf) free(vinf);
- if(!(vinf=_mm_calloc(sizeof(VINFO),vc_softchn))) 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: */