mirror of
https://github.com/FFmpeg/FFmpeg.git
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121 lines
4.7 KiB
C
121 lines
4.7 KiB
C
/*
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* SIMD-optimized LPC functions
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* Copyright (c) 2007 Loren Merritt
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/x86/asm.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/lpc.h"
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void ff_lpc_apply_welch_window_sse2(const int32_t *data, ptrdiff_t len,
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double *w_data);
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void ff_lpc_apply_welch_window_avx2(const int32_t *data, ptrdiff_t len,
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double *w_data);
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DECLARE_ASM_CONST(16, double, pd_1)[2] = { 1.0, 1.0 };
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#if HAVE_SSE2_INLINE
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static void lpc_compute_autocorr_sse2(const double *data, ptrdiff_t len, int lag,
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double *autoc)
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{
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int j;
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if((x86_reg)data & 15)
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data++;
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for(j=0; j<lag; j+=2){
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x86_reg i = -len*sizeof(double);
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if(j == lag-2) {
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__asm__ volatile(
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"movsd "MANGLE(pd_1)", %%xmm0 \n\t"
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"movsd "MANGLE(pd_1)", %%xmm1 \n\t"
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"movsd "MANGLE(pd_1)", %%xmm2 \n\t"
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"1: \n\t"
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"movapd (%2,%0), %%xmm3 \n\t"
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"movupd -8(%3,%0), %%xmm4 \n\t"
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"movapd (%3,%0), %%xmm5 \n\t"
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"mulpd %%xmm3, %%xmm4 \n\t"
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"mulpd %%xmm3, %%xmm5 \n\t"
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"mulpd -16(%3,%0), %%xmm3 \n\t"
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"addpd %%xmm4, %%xmm1 \n\t"
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"addpd %%xmm5, %%xmm0 \n\t"
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"addpd %%xmm3, %%xmm2 \n\t"
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"add $16, %0 \n\t"
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"jl 1b \n\t"
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"movhlps %%xmm0, %%xmm3 \n\t"
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"movhlps %%xmm1, %%xmm4 \n\t"
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"movhlps %%xmm2, %%xmm5 \n\t"
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"addsd %%xmm3, %%xmm0 \n\t"
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"addsd %%xmm4, %%xmm1 \n\t"
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"addsd %%xmm5, %%xmm2 \n\t"
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"movsd %%xmm0, (%1) \n\t"
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"movsd %%xmm1, 8(%1) \n\t"
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"movsd %%xmm2, 16(%1) \n\t"
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:"+&r"(i)
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:"r"(autoc+j), "r"(data+len), "r"(data+len-j)
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NAMED_CONSTRAINTS_ARRAY_ADD(pd_1)
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:"memory"
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);
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} else {
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__asm__ volatile(
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"movsd "MANGLE(pd_1)", %%xmm0 \n\t"
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"movsd "MANGLE(pd_1)", %%xmm1 \n\t"
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"1: \n\t"
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"movapd (%3,%0), %%xmm3 \n\t"
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"movupd -8(%4,%0), %%xmm4 \n\t"
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"mulpd %%xmm3, %%xmm4 \n\t"
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"mulpd (%4,%0), %%xmm3 \n\t"
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"addpd %%xmm4, %%xmm1 \n\t"
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"addpd %%xmm3, %%xmm0 \n\t"
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"add $16, %0 \n\t"
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"jl 1b \n\t"
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"movhlps %%xmm0, %%xmm3 \n\t"
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"movhlps %%xmm1, %%xmm4 \n\t"
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"addsd %%xmm3, %%xmm0 \n\t"
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"addsd %%xmm4, %%xmm1 \n\t"
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"movsd %%xmm0, %1 \n\t"
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"movsd %%xmm1, %2 \n\t"
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:"+&r"(i), "=m"(autoc[j]), "=m"(autoc[j+1])
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:"r"(data+len), "r"(data+len-j)
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NAMED_CONSTRAINTS_ARRAY_ADD(pd_1)
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);
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}
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}
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}
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#endif /* HAVE_SSE2_INLINE */
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av_cold void ff_lpc_init_x86(LPCContext *c)
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{
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int cpu_flags = av_get_cpu_flags();
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#if HAVE_SSE2_INLINE
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if (INLINE_SSE2_SLOW(cpu_flags))
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c->lpc_compute_autocorr = lpc_compute_autocorr_sse2;
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#endif
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if (EXTERNAL_SSE2(cpu_flags))
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c->lpc_apply_welch_window = ff_lpc_apply_welch_window_sse2;
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if (EXTERNAL_AVX2(cpu_flags))
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c->lpc_apply_welch_window = ff_lpc_apply_welch_window_avx2;
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}
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