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FFmpeg/libavcodec/liba52/resample_mmx.c

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Utility functions (CRC calc & float->int converters) [imported from MPlayer, based on a52dec's libao] Originally committed as revision 1780 to svn://svn.ffmpeg.org/ffmpeg/trunk
22 years ago
// MMX optimizations from Michael Niedermayer (michaelni@gmx.at) (under GPL)
/* optimization TODO / NOTES
movntq is slightly faster (0.5% with the current test.c benchmark)
(but thats just test.c so that needs to be testd in reallity)
and it would mean (C / MMX2 / MMX / 3DNOW) versions
*/
static uint64_t __attribute__((aligned(8))) magicF2W= 0x43c0000043c00000LL;
static uint64_t __attribute__((aligned(8))) wm1010= 0xFFFF0000FFFF0000LL;
static uint64_t __attribute__((aligned(8))) wm0101= 0x0000FFFF0000FFFFLL;
static uint64_t __attribute__((aligned(8))) wm1100= 0xFFFFFFFF00000000LL;
static int a52_resample_MONO_to_5_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-512, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"movq "MANGLE(wm1100)", %%mm3 \n\t"
"movq "MANGLE(wm0101)", %%mm4 \n\t"
"movq "MANGLE(wm1010)", %%mm5 \n\t"
"pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq (%1, %%esi, 2), %%mm0 \n\t"
"movq 8(%1, %%esi, 2), %%mm1 \n\t"
"leal (%%esi, %%esi, 4), %%edi \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"movq %%mm0, %%mm1 \n\t"
"pand %%mm4, %%mm0 \n\t"
"pand %%mm5, %%mm1 \n\t"
"movq %%mm6, (%0, %%edi) \n\t" // 0 0 0 0
"movd %%mm0, 8(%0, %%edi) \n\t" // A 0
"pand %%mm3, %%mm0 \n\t"
"movd %%mm6, 12(%0, %%edi) \n\t" // 0 0
"movd %%mm1, 16(%0, %%edi) \n\t" // 0 B
"pand %%mm3, %%mm1 \n\t"
"movd %%mm6, 20(%0, %%edi) \n\t" // 0 0
"movq %%mm0, 24(%0, %%edi) \n\t" // 0 0 C 0
"movq %%mm1, 32(%0, %%edi) \n\t" // 0 0 0 B
"addl $8, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1280), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 5*256;
}
static int a52_resample_STEREO_to_2_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
/* benchmark scores are 0.3% better with SSE but we would need to set bias=0 and premultiply it
#ifdef HAVE_SSE
asm volatile(
"movl $-1024, %%esi \n\t"
"1: \n\t"
"cvtps2pi (%1, %%esi), %%mm0 \n\t"
"cvtps2pi 1024(%1, %%esi), %%mm2\n\t"
"movq %%mm0, %%mm1 \n\t"
"punpcklwd %%mm2, %%mm0 \n\t"
"punpckhwd %%mm2, %%mm1 \n\t"
"movq %%mm0, (%0, %%esi) \n\t"
"movq %%mm1, 8(%0, %%esi) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+512), "r" (f+256)
:"%esi", "memory"
);*/
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"1: \n\t"
"movq (%1, %%esi), %%mm0 \n\t"
"movq 8(%1, %%esi), %%mm1 \n\t"
"movq 1024(%1, %%esi), %%mm2 \n\t"
"movq 1032(%1, %%esi), %%mm3 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"packssdw %%mm3, %%mm2 \n\t"
"movq %%mm0, %%mm1 \n\t"
"punpcklwd %%mm2, %%mm0 \n\t"
"punpckhwd %%mm2, %%mm1 \n\t"
"movq %%mm0, (%0, %%esi) \n\t"
"movq %%mm1, 8(%0, %%esi) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+512), "r" (f+256)
:"%esi", "memory"
);
return 2*256;
}
static int a52_resample_3F_to_5_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"pxor %%mm6, %%mm6 \n\t"
"movq %%mm7, %%mm5 \n\t"
"punpckldq %%mm6, %%mm5 \n\t"
"1: \n\t"
"movd (%1, %%esi), %%mm0 \n\t"
"punpckldq 2048(%1, %%esi), %%mm0\n\t"
"movd 1024(%1, %%esi), %%mm1 \n\t"
"punpckldq 4(%1, %%esi), %%mm1 \n\t"
"movd 2052(%1, %%esi), %%mm2 \n\t"
"movq %%mm7, %%mm3 \n\t"
"punpckldq 1028(%1, %%esi), %%mm3\n\t"
"movd 8(%1, %%esi), %%mm4 \n\t"
"punpckldq 2056(%1, %%esi), %%mm4\n\t"
"leal (%%esi, %%esi, 4), %%edi \n\t"
"sarl $1, %%edi \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm5, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"psubd %%mm7, %%mm4 \n\t"
"packssdw %%mm6, %%mm0 \n\t"
"packssdw %%mm2, %%mm1 \n\t"
"packssdw %%mm4, %%mm3 \n\t"
"movq %%mm0, (%0, %%edi) \n\t"
"movq %%mm1, 8(%0, %%edi) \n\t"
"movq %%mm3, 16(%0, %%edi) \n\t"
"movd 1032(%1, %%esi), %%mm1 \n\t"
"punpckldq 12(%1, %%esi), %%mm1\n\t"
"movd 2060(%1, %%esi), %%mm2 \n\t"
"movq %%mm7, %%mm3 \n\t"
"punpckldq 1036(%1, %%esi), %%mm3\n\t"
"pxor %%mm0, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm5, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"packssdw %%mm3, %%mm2 \n\t"
"movq %%mm0, 24(%0, %%edi) \n\t"
"movq %%mm2, 32(%0, %%edi) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1280), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 5*256;
}
static int a52_resample_2F_2R_to_4_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"1: \n\t"
"movq (%1, %%esi), %%mm0 \n\t"
"movq 8(%1, %%esi), %%mm1 \n\t"
"movq 1024(%1, %%esi), %%mm2 \n\t"
"movq 1032(%1, %%esi), %%mm3 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"packssdw %%mm3, %%mm2 \n\t"
"movq 2048(%1, %%esi), %%mm3 \n\t"
"movq 2056(%1, %%esi), %%mm4 \n\t"
"movq 3072(%1, %%esi), %%mm5 \n\t"
"movq 3080(%1, %%esi), %%mm6 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"psubd %%mm7, %%mm4 \n\t"
"psubd %%mm7, %%mm5 \n\t"
"psubd %%mm7, %%mm6 \n\t"
"packssdw %%mm4, %%mm3 \n\t"
"packssdw %%mm6, %%mm5 \n\t"
"movq %%mm0, %%mm1 \n\t"
"movq %%mm3, %%mm4 \n\t"
"punpcklwd %%mm2, %%mm0 \n\t"
"punpckhwd %%mm2, %%mm1 \n\t"
"punpcklwd %%mm5, %%mm3 \n\t"
"punpckhwd %%mm5, %%mm4 \n\t"
"movq %%mm0, %%mm2 \n\t"
"movq %%mm1, %%mm5 \n\t"
"punpckldq %%mm3, %%mm0 \n\t"
"punpckhdq %%mm3, %%mm2 \n\t"
"punpckldq %%mm4, %%mm1 \n\t"
"punpckhdq %%mm4, %%mm5 \n\t"
"movq %%mm0, (%0, %%esi,2) \n\t"
"movq %%mm2, 8(%0, %%esi,2) \n\t"
"movq %%mm1, 16(%0, %%esi,2) \n\t"
"movq %%mm5, 24(%0, %%esi,2) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1024), "r" (f+256)
:"%esi", "memory"
);
return 4*256;
}
static int a52_resample_3F_2R_to_5_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"1: \n\t"
"movd (%1, %%esi), %%mm0 \n\t"
"punpckldq 2048(%1, %%esi), %%mm0\n\t"
"movd 3072(%1, %%esi), %%mm1 \n\t"
"punpckldq 4096(%1, %%esi), %%mm1\n\t"
"movd 1024(%1, %%esi), %%mm2 \n\t"
"punpckldq 4(%1, %%esi), %%mm2 \n\t"
"movd 2052(%1, %%esi), %%mm3 \n\t"
"punpckldq 3076(%1, %%esi), %%mm3\n\t"
"movd 4100(%1, %%esi), %%mm4 \n\t"
"punpckldq 1028(%1, %%esi), %%mm4\n\t"
"movd 8(%1, %%esi), %%mm5 \n\t"
"punpckldq 2056(%1, %%esi), %%mm5\n\t"
"leal (%%esi, %%esi, 4), %%edi \n\t"
"sarl $1, %%edi \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"psubd %%mm7, %%mm4 \n\t"
"psubd %%mm7, %%mm5 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"packssdw %%mm3, %%mm2 \n\t"
"packssdw %%mm5, %%mm4 \n\t"
"movq %%mm0, (%0, %%edi) \n\t"
"movq %%mm2, 8(%0, %%edi) \n\t"
"movq %%mm4, 16(%0, %%edi) \n\t"
"movd 3080(%1, %%esi), %%mm0 \n\t"
"punpckldq 4104(%1, %%esi), %%mm0\n\t"
"movd 1032(%1, %%esi), %%mm1 \n\t"
"punpckldq 12(%1, %%esi), %%mm1\n\t"
"movd 2060(%1, %%esi), %%mm2 \n\t"
"punpckldq 3084(%1, %%esi), %%mm2\n\t"
"movd 4108(%1, %%esi), %%mm3 \n\t"
"punpckldq 1036(%1, %%esi), %%mm3\n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"packssdw %%mm3, %%mm2 \n\t"
"movq %%mm0, 24(%0, %%edi) \n\t"
"movq %%mm2, 32(%0, %%edi) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1280), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 5*256;
}
static int a52_resample_MONO_LFE_to_6_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq 1024(%1, %%esi), %%mm0 \n\t"
"movq 1032(%1, %%esi), %%mm1 \n\t"
"movq (%1, %%esi), %%mm2 \n\t"
"movq 8(%1, %%esi), %%mm3 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"packssdw %%mm1, %%mm0 \n\t"
"packssdw %%mm3, %%mm2 \n\t"
"movq %%mm0, %%mm1 \n\t"
"punpcklwd %%mm2, %%mm0 \n\t"
"punpckhwd %%mm2, %%mm1 \n\t"
"leal (%%esi, %%esi, 2), %%edi \n\t"
"movq %%mm6, (%0, %%edi) \n\t"
"movd %%mm0, 8(%0, %%edi) \n\t"
"punpckhdq %%mm0, %%mm0 \n\t"
"movq %%mm6, 12(%0, %%edi) \n\t"
"movd %%mm0, 20(%0, %%edi) \n\t"
"movq %%mm6, 24(%0, %%edi) \n\t"
"movd %%mm1, 32(%0, %%edi) \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movq %%mm6, 36(%0, %%edi) \n\t"
"movd %%mm1, 44(%0, %%edi) \n\t"
"addl $16, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1536), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 6*256;
}
static int a52_resample_STEREO_LFE_to_6_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq 1024(%1, %%esi), %%mm0 \n\t"
"movq 2048(%1, %%esi), %%mm1 \n\t"
"movq (%1, %%esi), %%mm5 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm5 \n\t"
"leal (%%esi, %%esi, 2), %%edi \n\t"
"pxor %%mm4, %%mm4 \n\t"
"packssdw %%mm5, %%mm0 \n\t" // FfAa
"packssdw %%mm4, %%mm1 \n\t" // 00Bb
"punpckhwd %%mm0, %%mm4 \n\t" // F0f0
"punpcklwd %%mm1, %%mm0 \n\t" // BAba
"movq %%mm0, %%mm1 \n\t" // BAba
"punpckldq %%mm4, %%mm3 \n\t" // f0XX
"punpckldq %%mm6, %%mm0 \n\t" // 00ba
"punpckhdq %%mm1, %%mm3 \n\t" // BAf0
"movq %%mm0, (%0, %%edi) \n\t" // 00ba
"punpckhdq %%mm4, %%mm0 \n\t" // F000
"movq %%mm3, 8(%0, %%edi) \n\t" // BAf0
"movq %%mm0, 16(%0, %%edi) \n\t" // F000
"addl $8, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1536), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 6*256;
}
static int a52_resample_3F_LFE_to_6_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
"pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq 1024(%1, %%esi), %%mm0 \n\t"
"movq 3072(%1, %%esi), %%mm1 \n\t"
"movq 2048(%1, %%esi), %%mm4 \n\t"
"movq (%1, %%esi), %%mm5 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm4 \n\t"
"psubd %%mm7, %%mm5 \n\t"
"leal (%%esi, %%esi, 2), %%edi \n\t"
"packssdw %%mm4, %%mm0 \n\t" // EeAa
"packssdw %%mm5, %%mm1 \n\t" // FfBb
"movq %%mm0, %%mm2 \n\t" // EeAa
"punpcklwd %%mm1, %%mm0 \n\t" // BAba
"punpckhwd %%mm1, %%mm2 \n\t" // FEfe
"movq %%mm0, %%mm1 \n\t" // BAba
"punpckldq %%mm6, %%mm0 \n\t" // 00ba
"punpckhdq %%mm1, %%mm1 \n\t" // BABA
"movq %%mm0, (%0, %%edi) \n\t"
"punpckhdq %%mm2, %%mm0 \n\t" // FE00
"punpckldq %%mm1, %%mm2 \n\t" // BAfe
"movq %%mm2, 8(%0, %%edi) \n\t"
"movq %%mm0, 16(%0, %%edi) \n\t"
"addl $8, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1536), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 6*256;
}
static int a52_resample_2F_2R_LFE_to_6_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
// "pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq 1024(%1, %%esi), %%mm0 \n\t"
"movq 2048(%1, %%esi), %%mm1 \n\t"
"movq 3072(%1, %%esi), %%mm2 \n\t"
"movq 4096(%1, %%esi), %%mm3 \n\t"
"movq (%1, %%esi), %%mm5 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"psubd %%mm7, %%mm5 \n\t"
"leal (%%esi, %%esi, 2), %%edi \n\t"
"packssdw %%mm2, %%mm0 \n\t" // CcAa
"packssdw %%mm3, %%mm1 \n\t" // DdBb
"packssdw %%mm5, %%mm5 \n\t" // FfFf
"movq %%mm0, %%mm2 \n\t" // CcAa
"punpcklwd %%mm1, %%mm0 \n\t" // BAba
"punpckhwd %%mm1, %%mm2 \n\t" // DCdc
"pxor %%mm4, %%mm4 \n\t" // 0000
"punpcklwd %%mm5, %%mm4 \n\t" // F0f0
"movq %%mm0, %%mm1 \n\t" // BAba
"movq %%mm4, %%mm3 \n\t" // F0f0
"punpckldq %%mm2, %%mm0 \n\t" // dcba
"punpckhdq %%mm1, %%mm1 \n\t" // BABA
"punpckldq %%mm1, %%mm4 \n\t" // BAf0
"punpckhdq %%mm3, %%mm2 \n\t" // F0DC
"movq %%mm0, (%0, %%edi) \n\t"
"movq %%mm4, 8(%0, %%edi) \n\t"
"movq %%mm2, 16(%0, %%edi) \n\t"
"addl $8, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1536), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 6*256;
}
static int a52_resample_3F_2R_LFE_to_6_MMX(float * _f, int16_t * s16){
int32_t * f = (int32_t *) _f;
asm volatile(
"movl $-1024, %%esi \n\t"
"movq "MANGLE(magicF2W)", %%mm7 \n\t"
// "pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq 1024(%1, %%esi), %%mm0 \n\t"
"movq 3072(%1, %%esi), %%mm1 \n\t"
"movq 4096(%1, %%esi), %%mm2 \n\t"
"movq 5120(%1, %%esi), %%mm3 \n\t"
"movq 2048(%1, %%esi), %%mm4 \n\t"
"movq (%1, %%esi), %%mm5 \n\t"
"psubd %%mm7, %%mm0 \n\t"
"psubd %%mm7, %%mm1 \n\t"
"psubd %%mm7, %%mm2 \n\t"
"psubd %%mm7, %%mm3 \n\t"
"psubd %%mm7, %%mm4 \n\t"
"psubd %%mm7, %%mm5 \n\t"
"leal (%%esi, %%esi, 2), %%edi \n\t"
"packssdw %%mm2, %%mm0 \n\t" // CcAa
"packssdw %%mm3, %%mm1 \n\t" // DdBb
"packssdw %%mm4, %%mm4 \n\t" // EeEe
"packssdw %%mm5, %%mm5 \n\t" // FfFf
"movq %%mm0, %%mm2 \n\t" // CcAa
"punpcklwd %%mm1, %%mm0 \n\t" // BAba
"punpckhwd %%mm1, %%mm2 \n\t" // DCdc
"punpcklwd %%mm5, %%mm4 \n\t" // FEfe
"movq %%mm0, %%mm1 \n\t" // BAba
"movq %%mm4, %%mm3 \n\t" // FEfe
"punpckldq %%mm2, %%mm0 \n\t" // dcba
"punpckhdq %%mm1, %%mm1 \n\t" // BABA
"punpckldq %%mm1, %%mm4 \n\t" // BAfe
"punpckhdq %%mm3, %%mm2 \n\t" // FEDC
"movq %%mm0, (%0, %%edi) \n\t"
"movq %%mm4, 8(%0, %%edi) \n\t"
"movq %%mm2, 16(%0, %%edi) \n\t"
"addl $8, %%esi \n\t"
" jnz 1b \n\t"
"emms \n\t"
:: "r" (s16+1536), "r" (f+256)
:"%esi", "%edi", "memory"
);
return 6*256;
}
static void* a52_resample_MMX(int flags, int ch){
switch (flags) {
case A52_MONO:
if(ch==5) return a52_resample_MONO_to_5_MMX;
break;
case A52_CHANNEL:
case A52_STEREO:
case A52_DOLBY:
if(ch==2) return a52_resample_STEREO_to_2_MMX;
break;
case A52_3F:
if(ch==5) return a52_resample_3F_to_5_MMX;
break;
case A52_2F2R:
if(ch==4) return a52_resample_2F_2R_to_4_MMX;
break;
case A52_3F2R:
if(ch==5) return a52_resample_3F_2R_to_5_MMX;
break;
case A52_MONO | A52_LFE:
if(ch==6) return a52_resample_MONO_LFE_to_6_MMX;
break;
case A52_CHANNEL | A52_LFE:
case A52_STEREO | A52_LFE:
case A52_DOLBY | A52_LFE:
if(ch==6) return a52_resample_STEREO_LFE_to_6_MMX;
break;
case A52_3F | A52_LFE:
if(ch==6) return a52_resample_3F_LFE_to_6_MMX;
break;
case A52_2F2R | A52_LFE:
if(ch==6) return a52_resample_2F_2R_LFE_to_6_MMX;
break;
case A52_3F2R | A52_LFE:
if(ch==6) return a52_resample_3F_2R_LFE_to_6_MMX;
break;
}
return NULL;
}