diff options
Diffstat (limited to 'audio/mixeng_template.h')
| -rw-r--r-- | audio/mixeng_template.h | 136 |
1 files changed, 101 insertions, 35 deletions
diff --git a/audio/mixeng_template.h b/audio/mixeng_template.h index f3b3f654fd..d726441e2e 100644 --- a/audio/mixeng_template.h +++ b/audio/mixeng_template.h @@ -1,8 +1,8 @@ /* * QEMU Mixing engine - * - * Copyright (c) 2004 Vassili Karpov (malc) - * + * + * Copyright (c) 2004-2005 Vassili Karpov (malc) + * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights @@ -27,85 +27,151 @@ * dec++'ified by Dscho */ +#ifndef SIGNED +#define HALF (IN_MAX >> 1) +#endif + +#ifdef NOVOL +#define VOL(a, b) a +#else +#ifdef FLOAT_MIXENG +#define VOL(a, b) ((a) * (b)) +#else +#define VOL(a, b) ((a) * (b)) >> 32 +#endif +#endif + +#define ET glue (ENDIAN_CONVERSION, glue (_, IN_T)) + +#ifdef FLOAT_MIXENG +static real_t inline glue (conv_, ET) (IN_T v) +{ + IN_T nv = ENDIAN_CONVERT (v); + +#ifdef RECIPROCAL +#ifdef SIGNED + return nv * (1.f / (real_t) (IN_MAX - IN_MIN)); +#else + return (nv - HALF) * (1.f / (real_t) IN_MAX); +#endif +#else /* !RECIPROCAL */ #ifdef SIGNED -#define HALFT IN_MAX -#define HALF IN_MAX + return nv / (real_t) (IN_MAX - IN_MIN); #else -#define HALFT ((IN_MAX)>>1) -#define HALF HALFT + return (nv - HALF) / (real_t) IN_MAX; #endif +#endif +} -static int64_t inline glue(conv_,IN_T) (IN_T v) +static IN_T inline glue (clip_, ET) (real_t v) { + if (v >= 0.5) { + return IN_MAX; + } + else if (v < -0.5) { + return IN_MIN; + } + +#ifdef SIGNED + return ENDIAN_CONVERT ((IN_T) (v * (IN_MAX - IN_MIN))); +#else + return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF)); +#endif +} + +#else /* !FLOAT_MIXENG */ + +static inline int64_t glue (conv_, ET) (IN_T v) +{ + IN_T nv = ENDIAN_CONVERT (v); #ifdef SIGNED - return (INT_MAX*(int64_t)v)/HALF; + return ((int64_t) nv) << (32 - SHIFT); #else - return (INT_MAX*((int64_t)v-HALFT))/HALF; + return ((int64_t) nv - HALF) << (32 - SHIFT); #endif } -static IN_T inline glue(clip_,IN_T) (int64_t v) +static inline IN_T glue (clip_, ET) (int64_t v) { - if (v >= INT_MAX) + if (v >= 0x7f000000) { return IN_MAX; - else if (v < -INT_MAX) + } + else if (v < -2147483648LL) { return IN_MIN; + } #ifdef SIGNED - return (IN_T) (v*HALF/INT_MAX); + return ENDIAN_CONVERT ((IN_T) (v >> (32 - SHIFT))); #else - return (IN_T) (v+INT_MAX/2)*HALF/INT_MAX; + return ENDIAN_CONVERT ((IN_T) ((v >> (32 - SHIFT)) + HALF)); #endif } +#endif -static void glue(glue(conv_,IN_T),_to_stereo) (void *dst, const void *src, - int samples) +static void glue (glue (conv_, ET), _to_stereo) + (st_sample_t *dst, const void *src, int samples, volume_t *vol) { - st_sample_t *out = (st_sample_t *) dst; + st_sample_t *out = dst; IN_T *in = (IN_T *) src; +#ifndef NOVOL + if (vol->mute) { + mixeng_clear (dst, samples); + return; + } +#else + (void) vol; +#endif while (samples--) { - out->l = glue(conv_,IN_T) (*in++); - out->r = glue(conv_,IN_T) (*in++); + out->l = VOL (glue (conv_, ET) (*in++), vol->l); + out->r = VOL (glue (conv_, ET) (*in++), vol->r); out += 1; } } -static void glue(glue(conv_,IN_T),_to_mono) (void *dst, const void *src, - int samples) +static void glue (glue (conv_, ET), _to_mono) + (st_sample_t *dst, const void *src, int samples, volume_t *vol) { - st_sample_t *out = (st_sample_t *) dst; + st_sample_t *out = dst; IN_T *in = (IN_T *) src; +#ifndef NOVOL + if (vol->mute) { + mixeng_clear (dst, samples); + return; + } +#else + (void) vol; +#endif while (samples--) { - out->l = glue(conv_,IN_T) (in[0]); + out->l = VOL (glue (conv_, ET) (in[0]), vol->l); out->r = out->l; out += 1; in += 1; } } -static void glue(glue(clip_,IN_T),_from_stereo) (void *dst, const void *src, - int samples) +static void glue (glue (clip_, ET), _from_stereo) + (void *dst, const st_sample_t *src, int samples) { - st_sample_t *in = (st_sample_t *) src; + const st_sample_t *in = src; IN_T *out = (IN_T *) dst; while (samples--) { - *out++ = glue(clip_,IN_T) (in->l); - *out++ = glue(clip_,IN_T) (in->r); + *out++ = glue (clip_, ET) (in->l); + *out++ = glue (clip_, ET) (in->r); in += 1; } } -static void glue(glue(clip_,IN_T),_from_mono) (void *dst, const void *src, - int samples) +static void glue (glue (clip_, ET), _from_mono) + (void *dst, const st_sample_t *src, int samples) { - st_sample_t *in = (st_sample_t *) src; + const st_sample_t *in = src; IN_T *out = (IN_T *) dst; while (samples--) { - *out++ = glue(clip_,IN_T) (in->l + in->r); + *out++ = glue (clip_, ET) (in->l + in->r); in += 1; } } +#undef ET #undef HALF -#undef HALFT - +#undef VOL |