diff options
Diffstat (limited to 'gst-libs/gst/resample/dtos.c')
| -rw-r--r-- | gst-libs/gst/resample/dtos.c | 257 |
1 files changed, 134 insertions, 123 deletions
diff --git a/gst-libs/gst/resample/dtos.c b/gst-libs/gst/resample/dtos.c index 268c401a..98e8f6a6 100644 --- a/gst-libs/gst/resample/dtos.c +++ b/gst-libs/gst/resample/dtos.c @@ -39,92 +39,98 @@ static float ints_high[256]; static float ints_low[256]; -void conv_double_short_table(double *dest, short *src, int n) +void +conv_double_short_table (double *dest, short *src, int n) { - static int init = 0; - int i; - unsigned int idx; - if(!init){ - for(i=0;i<256;i++){ - ints_high[i]=256.0*((i<128)?i:i-256); - ints_low[i]=i; - } - init = 1; - } - - if(n&1){ - idx = (unsigned short)*src++; - *dest++ = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; - n-=1; - } - for(i=0;i<n;i+=2){ - idx = (unsigned short)*src++; - *dest++ = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; - idx = (unsigned short)*src++; - *dest++ = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; - } + static int init = 0; + int i; + unsigned int idx; + + if (!init) { + for (i = 0; i < 256; i++) { + ints_high[i] = 256.0 * ((i < 128) ? i : i - 256); + ints_low[i] = i; + } + init = 1; + } + + if (n & 1) { + idx = (unsigned short) *src++; + *dest++ = ints_high[(idx >> 8)] + ints_low[(idx & 0xff)]; + n -= 1; + } + for (i = 0; i < n; i += 2) { + idx = (unsigned short) *src++; + *dest++ = ints_high[(idx >> 8)] + ints_low[(idx & 0xff)]; + idx = (unsigned short) *src++; + *dest++ = ints_high[(idx >> 8)] + ints_low[(idx & 0xff)]; + } } #endif #ifdef short_to_double_unroll -void conv_double_short_unroll(double *dest, short *src, int n) +void +conv_double_short_unroll (double *dest, short *src, int n) { - if(n&1){ - *dest++ = *src++; - n--; - } - if(n&2){ - *dest++ = *src++; - *dest++ = *src++; - n-=2; - } - while(n>0){ - *dest++ = *src++; - *dest++ = *src++; - *dest++ = *src++; - *dest++ = *src++; - n-=4; - } + if (n & 1) { + *dest++ = *src++; + n--; + } + if (n & 2) { + *dest++ = *src++; + *dest++ = *src++; + n -= 2; + } + while (n > 0) { + *dest++ = *src++; + *dest++ = *src++; + *dest++ = *src++; + *dest++ = *src++; + n -= 4; + } } #endif -void conv_double_short_ref(double *dest, short *src, int n) +void +conv_double_short_ref (double *dest, short *src, int n) { - int i; - for(i=0;i<n;i++){ - dest[i]=src[i]; - } + int i; + + for (i = 0; i < n; i++) { + dest[i] = src[i]; + } } #ifdef HAVE_CPU_PPC #if 0 -static union { int i[4]; float f[4]; } av_tmp __attribute__ ((__aligned__ (16))); +static union +{ + int i[4]; + float f[4]; +} av_tmp __attribute__ ((__aligned__ (16))); -void conv_double_short_altivec(double *dest, short *src, int n) +void +conv_double_short_altivec (double *dest, short *src, int n) { - int i; - - for(i=0;i<n;i+=4){ - av_tmp.i[0] = src[0]; - av_tmp.i[1] = src[1]; - av_tmp.i[2] = src[2]; - av_tmp.i[3] = src[3]; - - asm( - " lvx 0,0,%0\n" - " vcfsx 1,0,0\n" - " stvx 1,0,%0\n" - : : "r" (&av_tmp) - ); - - dest[0]=av_tmp.f[0]; - dest[1]=av_tmp.f[1]; - dest[2]=av_tmp.f[2]; - dest[3]=av_tmp.f[3]; - src += 4; - dest += 4; - } + int i; + + for (i = 0; i < n; i += 4) { + av_tmp.i[0] = src[0]; + av_tmp.i[1] = src[1]; + av_tmp.i[2] = src[2]; + av_tmp.i[3] = src[3]; + + asm (" lvx 0,0,%0\n" " vcfsx 1,0,0\n" " stvx 1,0,%0\n": :"r" (&av_tmp) + ); + + dest[0] = av_tmp.f[0]; + dest[1] = av_tmp.f[1]; + dest[2] = av_tmp.f[2]; + dest[3] = av_tmp.f[3]; + src += 4; + dest += 4; + } } #endif #endif @@ -133,73 +139,78 @@ void conv_double_short_altivec(double *dest, short *src, int n) /* double to short */ -void conv_short_double_ref(short *dest, double *src, int n) +void +conv_short_double_ref (short *dest, double *src, int n) { - int i; - double x; - - for(i=0;i<n;i++){ - x = *src++; - if(x<-32768.0)x=-32768.0; - if(x>32767.0)x=32767.0; - *dest++ = rint(x); - } + int i; + double x; + + for (i = 0; i < n; i++) { + x = *src++; + if (x < -32768.0) + x = -32768.0; + if (x > 32767.0) + x = 32767.0; + *dest++ = rint (x); + } } /* #ifdef HAVE_CPU_PPC */ #if 0 -void conv_short_double_ppcasm(short *dest, double *src, int n) +void +conv_short_double_ppcasm (short *dest, double *src, int n) { - int tmp[2]; - double min = -32768.0; - double max = 32767.0; - double ftmp0, ftmp1; - - asm __volatile__( - "\taddic. %3,%3,-8\n" - "\taddic. %6,%6,-2\n" - "loop:\n" - "\tlfdu %0,8(%3)\n" - "\tfsub %1,%0,%4\n" - "\tfsel %0,%1,%0,%4\n" - "\tfsub %1,%0,%5\n" - "\tfsel %0,%1,%5,%0\n" - "\tfctiw %1,%0\n" - "\taddic. 5,5,-1\n" - "\tstfd %1,0(%2)\n" - "\tlhz 9,6(%2)\n" - "\tsthu 9,2(%6)\n" - "\tbne loop\n" - : "=&f" (ftmp0), "=&f" (ftmp1) - : "b" (tmp), "r" (src), "f" (min), "f" (max), "r" (dest) - : "r9", "r5" ); + int tmp[2]; + double min = -32768.0; + double max = 32767.0; + double ftmp0, ftmp1; + + asm __volatile__ ("\taddic. %3,%3,-8\n" + "\taddic. %6,%6,-2\n" + "loop:\n" + "\tlfdu %0,8(%3)\n" + "\tfsub %1,%0,%4\n" + "\tfsel %0,%1,%0,%4\n" + "\tfsub %1,%0,%5\n" + "\tfsel %0,%1,%5,%0\n" + "\tfctiw %1,%0\n" + "\taddic. 5,5,-1\n" + "\tstfd %1,0(%2)\n" + "\tlhz 9,6(%2)\n" + "\tsthu 9,2(%6)\n" "\tbne loop\n":"=&f" (ftmp0), "=&f" (ftmp1) + :"b" (tmp), "r" (src), "f" (min), "f" (max), "r" (dest) + :"r9", "r5"); } #endif -void conv_double_short_dstr(double *dest, short *src, int n, int dstr) +void +conv_double_short_dstr (double *dest, short *src, int n, int dstr) { - int i; - void *d = dest; - for(i=0;i<n;i++){ - (*(double *)d)=*src++; - d += dstr; - } + int i; + void *d = dest; + + for (i = 0; i < n; i++) { + (*(double *) d) = *src++; + d += dstr; + } } -void conv_short_double_sstr(short *dest, double *src, int n, int sstr) +void +conv_short_double_sstr (short *dest, double *src, int n, int sstr) { - int i; - double x; - void *s = src; - - for(i=0;i<n;i++){ - x = *(double *)s; - if(x<-32768.0)x=-32768.0; - if(x>32767.0)x=32767.0; - *dest++ = rint(x); - s += sstr; - } + int i; + double x; + void *s = src; + + for (i = 0; i < n; i++) { + x = *(double *) s; + if (x < -32768.0) + x = -32768.0; + if (x > 32767.0) + x = 32767.0; + *dest++ = rint (x); + s += sstr; + } } - |