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Diffstat (limited to 'src/libs/mikmod/virtch_common.c')
| -rw-r--r-- | src/libs/mikmod/virtch_common.c | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/src/libs/mikmod/virtch_common.c b/src/libs/mikmod/virtch_common.c new file mode 100644 index 0000000..b0b81ee --- /dev/null +++ b/src/libs/mikmod/virtch_common.c @@ -0,0 +1,459 @@ +/* MikMod sound library + (c) 1998, 1999, 2000, 2001 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. +*/ + +/*============================================================================== + + $Id$ + + Common source parts between the two software mixers. + This file is probably the ugliest part of libmikmod... + +==============================================================================*/ + +#ifndef _IN_VIRTCH_ + +#include "mikmod_internals.h" + +extern BOOL VC1_Init(void); +extern BOOL VC2_Init(void); +static BOOL (*VC_Init_ptr)(void)=VC1_Init; +extern void VC1_Exit(void); +extern void VC2_Exit(void); +static void (*VC_Exit_ptr)(void)=VC1_Exit; +extern BOOL VC1_SetNumVoices(void); +extern BOOL VC2_SetNumVoices(void); +static BOOL (*VC_SetNumVoices_ptr)(void); +extern ULONG VC1_SampleSpace(int); +extern ULONG VC2_SampleSpace(int); +static ULONG (*VC_SampleSpace_ptr)(int); +extern ULONG VC1_SampleLength(int,SAMPLE*); +extern ULONG VC2_SampleLength(int,SAMPLE*); +static ULONG (*VC_SampleLength_ptr)(int,SAMPLE*); + +extern BOOL VC1_PlayStart(void); +extern BOOL VC2_PlayStart(void); +static BOOL (*VC_PlayStart_ptr)(void); +extern void VC1_PlayStop(void); +extern void VC2_PlayStop(void); +static void (*VC_PlayStop_ptr)(void); + +extern SWORD VC1_SampleLoad(struct SAMPLOAD*,int); +extern SWORD VC2_SampleLoad(struct SAMPLOAD*,int); +static SWORD (*VC_SampleLoad_ptr)(struct SAMPLOAD*,int); +extern void VC1_SampleUnload(SWORD); +extern void VC2_SampleUnload(SWORD); +static void (*VC_SampleUnload_ptr)(SWORD); + +extern ULONG VC1_WriteBytes(SBYTE*,ULONG); +extern ULONG VC2_WriteBytes(SBYTE*,ULONG); +static ULONG (*VC_WriteBytes_ptr)(SBYTE*,ULONG); +extern ULONG VC1_SilenceBytes(SBYTE*,ULONG); +extern ULONG VC2_SilenceBytes(SBYTE*,ULONG); +static ULONG (*VC_SilenceBytes_ptr)(SBYTE*,ULONG); + +extern void VC1_VoiceSetVolume(UBYTE,UWORD); +extern void VC2_VoiceSetVolume(UBYTE,UWORD); +static void (*VC_VoiceSetVolume_ptr)(UBYTE,UWORD); +extern UWORD VC1_VoiceGetVolume(UBYTE); +extern UWORD VC2_VoiceGetVolume(UBYTE); +static UWORD (*VC_VoiceGetVolume_ptr)(UBYTE); +extern void VC1_VoiceSetFrequency(UBYTE,ULONG); +extern void VC2_VoiceSetFrequency(UBYTE,ULONG); +static void (*VC_VoiceSetFrequency_ptr)(UBYTE,ULONG); +extern ULONG VC1_VoiceGetFrequency(UBYTE); +extern ULONG VC2_VoiceGetFrequency(UBYTE); +static ULONG (*VC_VoiceGetFrequency_ptr)(UBYTE); +extern void VC1_VoiceSetPanning(UBYTE,ULONG); +extern void VC2_VoiceSetPanning(UBYTE,ULONG); +static void (*VC_VoiceSetPanning_ptr)(UBYTE,ULONG); +extern ULONG VC1_VoiceGetPanning(UBYTE); +extern ULONG VC2_VoiceGetPanning(UBYTE); +static ULONG (*VC_VoiceGetPanning_ptr)(UBYTE); +extern void VC1_VoicePlay(UBYTE,SWORD,ULONG,ULONG,ULONG,ULONG,UWORD); +extern void VC2_VoicePlay(UBYTE,SWORD,ULONG,ULONG,ULONG,ULONG,UWORD); +static void (*VC_VoicePlay_ptr)(UBYTE,SWORD,ULONG,ULONG,ULONG,ULONG,UWORD); + +extern void VC1_VoiceStop(UBYTE); +extern void VC2_VoiceStop(UBYTE); +static void (*VC_VoiceStop_ptr)(UBYTE); +extern BOOL VC1_VoiceStopped(UBYTE); +extern BOOL VC2_VoiceStopped(UBYTE); +static BOOL (*VC_VoiceStopped_ptr)(UBYTE); +extern SLONG VC1_VoiceGetPosition(UBYTE); +extern SLONG VC2_VoiceGetPosition(UBYTE); +static SLONG (*VC_VoiceGetPosition_ptr)(UBYTE); +extern ULONG VC1_VoiceRealVolume(UBYTE); +extern ULONG VC2_VoiceRealVolume(UBYTE); +static ULONG (*VC_VoiceRealVolume_ptr)(UBYTE); + +#if defined __STDC__ || defined _MSC_VER || defined MPW_C +#define VC_PROC0(suffix) \ +MIKMODAPI void VC_##suffix (void) { VC_##suffix##_ptr(); } + +#define VC_FUNC0(suffix,ret) \ +MIKMODAPI ret VC_##suffix (void) { return VC_##suffix##_ptr(); } + +#define VC_PROC1(suffix,typ1) \ +MIKMODAPI void VC_##suffix (typ1 a) { VC_##suffix##_ptr(a); } + +#define VC_FUNC1(suffix,ret,typ1) \ +MIKMODAPI ret VC_##suffix (typ1 a) { return VC_##suffix##_ptr(a); } + +#define VC_PROC2(suffix,typ1,typ2) \ +MIKMODAPI void VC_##suffix (typ1 a,typ2 b) { VC_##suffix##_ptr(a,b); } + +#define VC_FUNC2(suffix,ret,typ1,typ2) \ +MIKMODAPI ret VC_##suffix (typ1 a,typ2 b) { return VC_##suffix##_ptr(a,b); } +#else +#define VC_PROC0(suffix) \ +MIKMODAPI void VC_/**/suffix (void) { VC_/**/suffix/**/_ptr(); } + +#define VC_FUNC0(suffix,ret) \ +MIKMODAPI ret VC_/**/suffix (void) { return VC_/**/suffix/**/_ptr(); } + +#define VC_PROC1(suffix,typ1) \ +MIKMODAPI void VC_/**/suffix (typ1 a) { VC_/**/suffix/**/_ptr(a); } + +#define VC_FUNC1(suffix,ret,typ1) \ +MIKMODAPI ret VC_/**/suffix (typ1 a) { return VC_/**/suffix/**/_ptr(a); } + +#define VC_PROC2(suffix,typ1,typ2) \ +MIKMODAPI void VC_/**/suffix (typ1 a,typ2 b) { VC_/**/suffix/**/_ptr(a,b); } + +#define VC_FUNC2(suffix,ret,typ1,typ2) \ +MIKMODAPI ret VC_/**/suffix (typ1 a,typ2 b) { return VC_/**/suffix/**/_ptr(a,b); } +#endif + +VC_FUNC0(Init,BOOL) +VC_PROC0(Exit) +VC_FUNC0(SetNumVoices,BOOL) +VC_FUNC1(SampleSpace,ULONG,int) +VC_FUNC2(SampleLength,ULONG,int,SAMPLE*) +VC_FUNC0(PlayStart,BOOL) +VC_PROC0(PlayStop) +VC_FUNC2(SampleLoad,SWORD,struct SAMPLOAD*,int) +VC_PROC1(SampleUnload,SWORD) +VC_FUNC2(WriteBytes,ULONG,SBYTE*,ULONG) +VC_FUNC2(SilenceBytes,ULONG,SBYTE*,ULONG) +VC_PROC2(VoiceSetVolume,UBYTE,UWORD) +VC_FUNC1(VoiceGetVolume,UWORD,UBYTE) +VC_PROC2(VoiceSetFrequency,UBYTE,ULONG) +VC_FUNC1(VoiceGetFrequency,ULONG,UBYTE) +VC_PROC2(VoiceSetPanning,UBYTE,ULONG) +VC_FUNC1(VoiceGetPanning,ULONG,UBYTE) + +void VC_VoicePlay(UBYTE a,SWORD b,ULONG c,ULONG d,ULONG e,ULONG f,UWORD g) +{ VC_VoicePlay_ptr(a,b,c,d,e,f,g); } + +VC_PROC1(VoiceStop,UBYTE) +VC_FUNC1(VoiceStopped,BOOL,UBYTE) +VC_FUNC1(VoiceGetPosition,SLONG,UBYTE) +VC_FUNC1(VoiceRealVolume,ULONG,UBYTE) + +void VC_SetupPointers(void) +{ + if (md_mode&DMODE_HQMIXER) { + VC_Init_ptr=VC2_Init; + VC_Exit_ptr=VC2_Exit; + VC_SetNumVoices_ptr=VC2_SetNumVoices; + VC_SampleSpace_ptr=VC2_SampleSpace; + VC_SampleLength_ptr=VC2_SampleLength; + VC_PlayStart_ptr=VC2_PlayStart; + VC_PlayStop_ptr=VC2_PlayStop; + VC_SampleLoad_ptr=VC2_SampleLoad; + VC_SampleUnload_ptr=VC2_SampleUnload; + VC_WriteBytes_ptr=VC2_WriteBytes; + VC_SilenceBytes_ptr=VC2_SilenceBytes; + VC_VoiceSetVolume_ptr=VC2_VoiceSetVolume; + VC_VoiceGetVolume_ptr=VC2_VoiceGetVolume; + VC_VoiceSetFrequency_ptr=VC2_VoiceSetFrequency; + VC_VoiceGetFrequency_ptr=VC2_VoiceGetFrequency; + VC_VoiceSetPanning_ptr=VC2_VoiceSetPanning; + VC_VoiceGetPanning_ptr=VC2_VoiceGetPanning; + VC_VoicePlay_ptr=VC2_VoicePlay; + VC_VoiceStop_ptr=VC2_VoiceStop; + VC_VoiceStopped_ptr=VC2_VoiceStopped; + VC_VoiceGetPosition_ptr=VC2_VoiceGetPosition; + VC_VoiceRealVolume_ptr=VC2_VoiceRealVolume; + } else { + VC_Init_ptr=VC1_Init; + VC_Exit_ptr=VC1_Exit; + VC_SetNumVoices_ptr=VC1_SetNumVoices; + VC_SampleSpace_ptr=VC1_SampleSpace; + VC_SampleLength_ptr=VC1_SampleLength; + VC_PlayStart_ptr=VC1_PlayStart; + VC_PlayStop_ptr=VC1_PlayStop; + VC_SampleLoad_ptr=VC1_SampleLoad; + VC_SampleUnload_ptr=VC1_SampleUnload; + VC_WriteBytes_ptr=VC1_WriteBytes; + VC_SilenceBytes_ptr=VC1_SilenceBytes; + VC_VoiceSetVolume_ptr=VC1_VoiceSetVolume; + VC_VoiceGetVolume_ptr=VC1_VoiceGetVolume; + VC_VoiceSetFrequency_ptr=VC1_VoiceSetFrequency; + VC_VoiceGetFrequency_ptr=VC1_VoiceGetFrequency; + VC_VoiceSetPanning_ptr=VC1_VoiceSetPanning; + VC_VoiceGetPanning_ptr=VC1_VoiceGetPanning; + VC_VoicePlay_ptr=VC1_VoicePlay; + VC_VoiceStop_ptr=VC1_VoiceStop; + VC_VoiceStopped_ptr=VC1_VoiceStopped; + VC_VoiceGetPosition_ptr=VC1_VoiceGetPosition; + VC_VoiceRealVolume_ptr=VC1_VoiceRealVolume; + } +} + +#else + +#ifndef _VIRTCH_COMMON_ +#define _VIRTCH_COMMON_ + +static ULONG samples2bytes(ULONG samples) +{ + if(vc_mode & DMODE_16BITS) samples <<= 1; + if(vc_mode & DMODE_STEREO) samples <<= 1; + return samples; +} + +static ULONG bytes2samples(ULONG bytes) +{ + if(vc_mode & DMODE_16BITS) bytes >>= 1; + if(vc_mode & DMODE_STEREO) bytes >>= 1; + return bytes; +} + +/* Fill the buffer with 'todo' bytes of silence (it depends on the mixing mode + how the buffer is filled) */ +ULONG VC1_SilenceBytes(SBYTE* buf,ULONG todo) +{ + todo=samples2bytes(bytes2samples(todo)); + + /* clear the buffer to zero (16 bits signed) or 0x80 (8 bits unsigned) */ + if(vc_mode & DMODE_16BITS) + memset(buf,0,todo); + else + memset(buf,0x80,todo); + + return todo; +} + +void VC1_WriteSamples(SBYTE*,ULONG); + +/* Writes 'todo' mixed SBYTES (!!) to 'buf'. It returns the number of SBYTES + actually written to 'buf' (which is rounded to number of samples that fit + into 'todo' bytes). */ +ULONG VC1_WriteBytes(SBYTE* buf,ULONG todo) +{ + if(!vc_softchn) + return VC1_SilenceBytes(buf,todo); + + todo = bytes2samples(todo); + VC1_WriteSamples(buf,todo); + + return samples2bytes(todo); +} + +void VC1_Exit(void) +{ + if(vc_tickbuf) MikMod_free(vc_tickbuf); + if(vinf) MikMod_free(vinf); + if(Samples) MikMod_free(Samples); + + vc_tickbuf = NULL; + vinf = NULL; + Samples = NULL; + + VC_SetupPointers(); +} + +UWORD VC1_VoiceGetVolume(UBYTE voice) +{ + return vinf[voice].vol; +} + +ULONG VC1_VoiceGetPanning(UBYTE voice) +{ + return vinf[voice].pan; +} + +void VC1_VoiceSetFrequency(UBYTE voice,ULONG frq) +{ + vinf[voice].frq=frq; +} + +ULONG VC1_VoiceGetFrequency(UBYTE voice) +{ + return vinf[voice].frq; +} + +void VC1_VoicePlay(UBYTE voice,SWORD handle,ULONG start,ULONG size,ULONG reppos,ULONG repend,UWORD flags) +{ + vinf[voice].flags = flags; + vinf[voice].handle = handle; + vinf[voice].start = start; + vinf[voice].size = size; + vinf[voice].reppos = reppos; + vinf[voice].repend = repend; + vinf[voice].kick = 1; +} + +void VC1_VoiceStop(UBYTE voice) +{ + vinf[voice].active = 0; +} + +BOOL VC1_VoiceStopped(UBYTE voice) +{ + return(vinf[voice].active==0); +} + +SLONG VC1_VoiceGetPosition(UBYTE voice) +{ + return(vinf[voice].current>>FRACBITS); +} + +void VC1_VoiceSetVolume(UBYTE voice,UWORD vol) +{ + /* protect against clicks if volume variation is too high */ + if(abs((int)vinf[voice].vol-(int)vol)>32) + vinf[voice].rampvol=CLICK_BUFFER; + vinf[voice].vol=vol; +} + +void VC1_VoiceSetPanning(UBYTE voice,ULONG pan) +{ + /* protect against clicks if panning variation is too high */ + if(abs((int)vinf[voice].pan-(int)pan)>48) + vinf[voice].rampvol=CLICK_BUFFER; + vinf[voice].pan=pan; +} + +/*========== External mixer interface */ + +void VC1_SampleUnload(SWORD handle) +{ + if (handle<MAXSAMPLEHANDLES) { + if (Samples[handle]) + MikMod_free(Samples[handle]); + Samples[handle]=NULL; + } +} + +SWORD VC1_SampleLoad(struct SAMPLOAD* sload,int type) +{ + SAMPLE *s = sload->sample; + int handle; + ULONG t, length,loopstart,loopend; + + if(type==MD_HARDWARE) return -1; + + /* Find empty slot to put sample address in */ + for(handle=0;handle<MAXSAMPLEHANDLES;handle++) + if(!Samples[handle]) break; + + if(handle==MAXSAMPLEHANDLES) { + _mm_errno = MMERR_OUT_OF_HANDLES; + return -1; + } + + /* Reality check for loop settings */ + if (s->loopend > s->length) + s->loopend = s->length; + if (s->loopstart >= s->loopend) + s->flags &= ~SF_LOOP; + + length = s->length; + loopstart = s->loopstart; + loopend = s->loopend; + + SL_SampleSigned(sload); + SL_Sample8to16(sload); + + if(!(Samples[handle]=(SWORD*)MikMod_malloc((length+20)<<1))) { + _mm_errno = MMERR_SAMPLE_TOO_BIG; + return -1; + } + + /* read sample into buffer */ + if (SL_Load(Samples[handle],sload,length)) + return -1; + + /* Unclick sample */ + if(s->flags & SF_LOOP) { + if(s->flags & SF_BIDI) + for(t=0;t<16;t++) + Samples[handle][loopend+t]=Samples[handle][(loopend-t)-1]; + else + for(t=0;t<16;t++) + Samples[handle][loopend+t]=Samples[handle][t+loopstart]; + } else + for(t=0;t<16;t++) + Samples[handle][t+length]=0; + + return handle; +} + +ULONG VC1_SampleSpace(int type) +{ + (void)type; /* unused arg */ + + return vc_memory; +} + +ULONG VC1_SampleLength(int type,SAMPLE* s) +{ + (void)type; /* unused arg */ + + if (!s) return 0; + + return (s->length*((s->flags&SF_16BITS)?2:1))+16; +} + +ULONG VC1_VoiceRealVolume(UBYTE voice) +{ + ULONG i,s,size; + int k,j; + SWORD *smp; + SLONG t; + + t = vinf[voice].current>>FRACBITS; + if(!vinf[voice].active) return 0; + + s = vinf[voice].handle; + size = vinf[voice].size; + + i=64; t-=64; k=0; j=0; + if(i>size) i = size; + if(t<0) t = 0; + if(t+i > size) t = size-i; + + i &= ~1; /* make sure it's EVEN. */ + + smp = &Samples[s][t]; + for(;i;i--,smp++) { + if(k<*smp) k = *smp; + if(j>*smp) j = *smp; + } + return abs(k-j); +} + +#endif + +#endif + +/* ex:set ts=4: */ |