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src/hardware/snd_pc98/sound/getsnd/getsmix.c
00001 #include    "np2glue.h"
00002 //#include      "compiler.h"
00003 #include        "getsnd.h"
00004 
00005 
00006 #define DNBASEBITS      12
00007 #define DNMIXBASE       (1 << DNBASEBITS)
00008 
00009 #define UPBASEBITS      12
00010 #define UPMIXBASE       (1 << UPBASEBITS)
00011 
00012 
00013 // 偽物てんぷれーと
00014 // マイクロソフトはマクロ展開下手だから動作チェキするように。
00015 
00016 // ---- モノラル出力
00017 
00018 #define MIX_INPUTBIT    8
00019 #define MIX_OUTPUTBIT   16
00020 #define MIX_CHANNELS    1
00021 #define FUNC_NOR                m8m16nr
00022 #define FUNC_DOWN               m8m16dn
00023 #define FUNC_UP                 m8m16up
00024 #include "getsndmn.mcr"
00025 
00026 #define MIX_INPUTBIT    8
00027 #define MIX_OUTPUTBIT   16
00028 #define MIX_CHANNELS    2
00029 #define FUNC_NOR                s8m16nr
00030 #define FUNC_DOWN               s8m16dn
00031 #define FUNC_UP                 s8m16up
00032 #include "getsndmn.mcr"
00033 
00034 #define MIX_INPUTBIT    16
00035 #define MIX_OUTPUTBIT   16
00036 #define MIX_CHANNELS    1
00037 #define FUNC_NOR                m16m16nr
00038 #define FUNC_DOWN               m16m16dn
00039 #define FUNC_UP                 m16m16up
00040 #include "getsndmn.mcr"
00041 
00042 #define MIX_INPUTBIT    16
00043 #define MIX_OUTPUTBIT   16
00044 #define MIX_CHANNELS    2
00045 #define FUNC_NOR                s16m16nr
00046 #define FUNC_DOWN               s16m16dn
00047 #define FUNC_UP                 s16m16up
00048 #include "getsndmn.mcr"
00049 
00050 
00051 // ---- ステレオ出力
00052 
00053 #define MIX_INPUTBIT    8
00054 #define MIX_OUTPUTBIT   16
00055 #define MIX_CHANNELS    1
00056 #define FUNC_NOR                m8s16nr
00057 #define FUNC_DOWN               m8s16dn
00058 #define FUNC_UP                 m8s16up
00059 #include "getsndst.mcr"
00060 
00061 #define MIX_INPUTBIT    8
00062 #define MIX_OUTPUTBIT   16
00063 #define MIX_CHANNELS    2
00064 #define FUNC_NOR                s8s16nr
00065 #define FUNC_DOWN               s8s16dn
00066 #define FUNC_UP                 s8s16up
00067 #include "getsndst.mcr"
00068 
00069 #define MIX_INPUTBIT    16
00070 #define MIX_OUTPUTBIT   16
00071 #define MIX_CHANNELS    1
00072 #define FUNC_NOR                m16s16nr
00073 #define FUNC_DOWN               m16s16dn
00074 #define FUNC_UP                 m16s16up
00075 #include "getsndst.mcr"
00076 
00077 #define MIX_INPUTBIT    16
00078 #define MIX_OUTPUTBIT   16
00079 #define MIX_CHANNELS    2
00080 #define FUNC_NOR                s16s16nr
00081 #define FUNC_DOWN               s16s16dn
00082 #define FUNC_UP                 s16s16up
00083 #include "getsndst.mcr"
00084 
00085 
00086 static const GSCNV cnvfunc[] = {
00087                         (GSCNV)m8m16nr,         (GSCNV)m8m16dn,         (GSCNV)m8m16up,
00088                         (GSCNV)s8m16nr,         (GSCNV)s8m16dn,         (GSCNV)s8m16up,
00089                         (GSCNV)m16m16nr,        (GSCNV)m16m16dn,        (GSCNV)m16m16up,
00090                         (GSCNV)s16m16nr,        (GSCNV)s16m16dn,        (GSCNV)s16m16up,
00091 
00092                         (GSCNV)m8s16nr,         (GSCNV)m8s16dn,         (GSCNV)m8s16up,
00093                         (GSCNV)s8s16nr,         (GSCNV)s8s16dn,         (GSCNV)s8s16up,
00094                         (GSCNV)m16s16nr,        (GSCNV)m16s16dn,        (GSCNV)m16s16up,
00095                         (GSCNV)s16s16nr,        (GSCNV)s16s16dn,        (GSCNV)s16s16up};
00096 
00097 
00098 BOOL getsnd_setmixproc(GETSND snd, UINT samprate, UINT channles) {
00099 
00100         int             funcnum;
00101 
00102         if ((snd->samplingrate < 8000) || (snd->samplingrate > 96000)) {
00103                 goto gssmp_err;
00104         }
00105         if ((samprate < 8000) || (samprate > 96000)) {
00106                 goto gssmp_err;
00107         }
00108 
00109         funcnum = 0;
00110         if (snd->channels == 1) {
00111         }
00112         else if (snd->channels == 2) {
00113                 funcnum |= 1;
00114         }
00115         else {
00116                 goto gssmp_err;
00117         }
00118 
00119         if (snd->bit == 8) {
00120         }
00121         else if (snd->bit == 16) {
00122                 funcnum |= 2;
00123         }
00124         else {
00125                 goto gssmp_err;
00126         }
00127 
00128         if (channles == 1) {
00129         }
00130         else if (channles == 2) {
00131                 funcnum |= 4;
00132         }
00133         else {
00134                 goto gssmp_err;
00135         }
00136 
00137         funcnum *= 3;
00138 
00139         if (snd->samplingrate > samprate) {
00140                 snd->mrate = (DNMIXBASE * samprate) / snd->samplingrate;
00141                 snd->rem = DNMIXBASE;
00142                 funcnum += 1;
00143         }
00144         else if (snd->samplingrate < samprate) {
00145                 snd->mrate = (UPMIXBASE * samprate) / snd->samplingrate;
00146                 funcnum += 2;
00147         }
00148         snd->cnv = cnvfunc[funcnum];
00149         return(SUCCESS);
00150 
00151 gssmp_err:
00152         return(FAILURE);
00153 }
00154