mirror of https://git.ffmpeg.org/ffmpeg.git
160 lines
6.4 KiB
C
160 lines
6.4 KiB
C
/*
|
|
* MMX optimized LPC DSP utils
|
|
* Copyright (c) 2007 Loren Merritt
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/cpu.h"
|
|
#include "libavutil/mem.h"
|
|
#include "libavutil/x86/asm.h"
|
|
#include "libavutil/x86/cpu.h"
|
|
#include "libavcodec/lpc.h"
|
|
|
|
DECLARE_ASM_CONST(16, double, pd_1)[2] = { 1.0, 1.0 };
|
|
DECLARE_ASM_CONST(16, double, pd_2)[2] = { 2.0, 2.0 };
|
|
|
|
#if HAVE_SSE2_INLINE
|
|
|
|
static void lpc_apply_welch_window_sse2(const int32_t *data, int len,
|
|
double *w_data)
|
|
{
|
|
double c = 2.0 / (len-1.0);
|
|
int n2 = len>>1;
|
|
x86_reg i = -n2*sizeof(int32_t);
|
|
x86_reg j = n2*sizeof(int32_t);
|
|
__asm__ volatile(
|
|
"movsd %4, %%xmm7 \n\t"
|
|
"movapd "MANGLE(pd_1)", %%xmm6 \n\t"
|
|
"movapd "MANGLE(pd_2)", %%xmm5 \n\t"
|
|
"movlhps %%xmm7, %%xmm7 \n\t"
|
|
"subpd %%xmm5, %%xmm7 \n\t"
|
|
"addsd %%xmm6, %%xmm7 \n\t"
|
|
"test $1, %5 \n\t"
|
|
"jz 2f \n\t"
|
|
#define WELCH(MOVPD, offset)\
|
|
"1: \n\t"\
|
|
"movapd %%xmm7, %%xmm1 \n\t"\
|
|
"mulpd %%xmm1, %%xmm1 \n\t"\
|
|
"movapd %%xmm6, %%xmm0 \n\t"\
|
|
"subpd %%xmm1, %%xmm0 \n\t"\
|
|
"pshufd $0x4e, %%xmm0, %%xmm1 \n\t"\
|
|
"cvtpi2pd (%3,%0), %%xmm2 \n\t"\
|
|
"cvtpi2pd "#offset"*4(%3,%1), %%xmm3 \n\t"\
|
|
"mulpd %%xmm0, %%xmm2 \n\t"\
|
|
"mulpd %%xmm1, %%xmm3 \n\t"\
|
|
"movapd %%xmm2, (%2,%0,2) \n\t"\
|
|
MOVPD" %%xmm3, "#offset"*8(%2,%1,2) \n\t"\
|
|
"subpd %%xmm5, %%xmm7 \n\t"\
|
|
"sub $8, %1 \n\t"\
|
|
"add $8, %0 \n\t"\
|
|
"jl 1b \n\t"\
|
|
|
|
WELCH("movupd", -1)
|
|
"jmp 3f \n\t"
|
|
"2: \n\t"
|
|
WELCH("movapd", -2)
|
|
"3: \n\t"
|
|
:"+&r"(i), "+&r"(j)
|
|
:"r"(w_data+n2), "r"(data+n2), "m"(c), "r"(len)
|
|
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
|
|
"%xmm5", "%xmm6", "%xmm7")
|
|
);
|
|
#undef WELCH
|
|
}
|
|
|
|
static void lpc_compute_autocorr_sse2(const double *data, int len, int lag,
|
|
double *autoc)
|
|
{
|
|
int j;
|
|
|
|
if((x86_reg)data & 15)
|
|
data++;
|
|
|
|
for(j=0; j<lag; j+=2){
|
|
x86_reg i = -len*sizeof(double);
|
|
if(j == lag-2) {
|
|
__asm__ volatile(
|
|
"movsd "MANGLE(pd_1)", %%xmm0 \n\t"
|
|
"movsd "MANGLE(pd_1)", %%xmm1 \n\t"
|
|
"movsd "MANGLE(pd_1)", %%xmm2 \n\t"
|
|
"1: \n\t"
|
|
"movapd (%2,%0), %%xmm3 \n\t"
|
|
"movupd -8(%3,%0), %%xmm4 \n\t"
|
|
"movapd (%3,%0), %%xmm5 \n\t"
|
|
"mulpd %%xmm3, %%xmm4 \n\t"
|
|
"mulpd %%xmm3, %%xmm5 \n\t"
|
|
"mulpd -16(%3,%0), %%xmm3 \n\t"
|
|
"addpd %%xmm4, %%xmm1 \n\t"
|
|
"addpd %%xmm5, %%xmm0 \n\t"
|
|
"addpd %%xmm3, %%xmm2 \n\t"
|
|
"add $16, %0 \n\t"
|
|
"jl 1b \n\t"
|
|
"movhlps %%xmm0, %%xmm3 \n\t"
|
|
"movhlps %%xmm1, %%xmm4 \n\t"
|
|
"movhlps %%xmm2, %%xmm5 \n\t"
|
|
"addsd %%xmm3, %%xmm0 \n\t"
|
|
"addsd %%xmm4, %%xmm1 \n\t"
|
|
"addsd %%xmm5, %%xmm2 \n\t"
|
|
"movsd %%xmm0, (%1) \n\t"
|
|
"movsd %%xmm1, 8(%1) \n\t"
|
|
"movsd %%xmm2, 16(%1) \n\t"
|
|
:"+&r"(i)
|
|
:"r"(autoc+j), "r"(data+len), "r"(data+len-j)
|
|
:"memory"
|
|
);
|
|
} else {
|
|
__asm__ volatile(
|
|
"movsd "MANGLE(pd_1)", %%xmm0 \n\t"
|
|
"movsd "MANGLE(pd_1)", %%xmm1 \n\t"
|
|
"1: \n\t"
|
|
"movapd (%3,%0), %%xmm3 \n\t"
|
|
"movupd -8(%4,%0), %%xmm4 \n\t"
|
|
"mulpd %%xmm3, %%xmm4 \n\t"
|
|
"mulpd (%4,%0), %%xmm3 \n\t"
|
|
"addpd %%xmm4, %%xmm1 \n\t"
|
|
"addpd %%xmm3, %%xmm0 \n\t"
|
|
"add $16, %0 \n\t"
|
|
"jl 1b \n\t"
|
|
"movhlps %%xmm0, %%xmm3 \n\t"
|
|
"movhlps %%xmm1, %%xmm4 \n\t"
|
|
"addsd %%xmm3, %%xmm0 \n\t"
|
|
"addsd %%xmm4, %%xmm1 \n\t"
|
|
"movsd %%xmm0, %1 \n\t"
|
|
"movsd %%xmm1, %2 \n\t"
|
|
:"+&r"(i), "=m"(autoc[j]), "=m"(autoc[j+1])
|
|
:"r"(data+len), "r"(data+len-j)
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* HAVE_SSE2_INLINE */
|
|
|
|
av_cold void ff_lpc_init_x86(LPCContext *c)
|
|
{
|
|
#if HAVE_SSE2_INLINE
|
|
int cpu_flags = av_get_cpu_flags();
|
|
|
|
if (HAVE_SSE2_INLINE && cpu_flags & (AV_CPU_FLAG_SSE2 | AV_CPU_FLAG_SSE2SLOW)) {
|
|
c->lpc_apply_welch_window = lpc_apply_welch_window_sse2;
|
|
c->lpc_compute_autocorr = lpc_compute_autocorr_sse2;
|
|
}
|
|
#endif /* HAVE_SSE2_INLINE */
|
|
}
|