/* * SIMD-optimized MP3 decoding functions * Copyright (c) 2010 Vitor Sessak * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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/internal.h" #include "libavutil/x86/asm.h" #include "libavutil/x86/cpu.h" #include "libavcodec/mpegaudiodsp.h" void ff_imdct36_float_sse(float *out, float *buf, float *in, float *win); void ff_imdct36_float_sse2(float *out, float *buf, float *in, float *win); void ff_imdct36_float_sse3(float *out, float *buf, float *in, float *win); void ff_imdct36_float_ssse3(float *out, float *buf, float *in, float *win); void ff_imdct36_float_avx(float *out, float *buf, float *in, float *win); void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win, float *tmpbuf); void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win, float *tmpbuf); DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40]; #if HAVE_SSE2_INLINE #define MACS(rt, ra, rb) rt+=(ra)*(rb) #define MLSS(rt, ra, rb) rt-=(ra)*(rb) #define SUM8(op, sum, w, p) \ { \ op(sum, (w)[0 * 64], (p)[0 * 64]); \ op(sum, (w)[1 * 64], (p)[1 * 64]); \ op(sum, (w)[2 * 64], (p)[2 * 64]); \ op(sum, (w)[3 * 64], (p)[3 * 64]); \ op(sum, (w)[4 * 64], (p)[4 * 64]); \ op(sum, (w)[5 * 64], (p)[5 * 64]); \ op(sum, (w)[6 * 64], (p)[6 * 64]); \ op(sum, (w)[7 * 64], (p)[7 * 64]); \ } static void apply_window(const float *buf, const float *win1, const float *win2, float *sum1, float *sum2, int len) { x86_reg count = - 4*len; const float *win1a = win1+len; const float *win2a = win2+len; const float *bufa = buf+len; float *sum1a = sum1+len; float *sum2a = sum2+len; #define MULT(a, b) \ "movaps " #a "(%1,%0), %%xmm1 \n\t" \ "movaps " #a "(%3,%0), %%xmm2 \n\t" \ "mulps %%xmm2, %%xmm1 \n\t" \ "subps %%xmm1, %%xmm0 \n\t" \ "mulps " #b "(%2,%0), %%xmm2 \n\t" \ "subps %%xmm2, %%xmm4 \n\t" \ __asm__ volatile( "1: \n\t" "xorps %%xmm0, %%xmm0 \n\t" "xorps %%xmm4, %%xmm4 \n\t" MULT( 0, 0) MULT( 256, 64) MULT( 512, 128) MULT( 768, 192) MULT(1024, 256) MULT(1280, 320) MULT(1536, 384) MULT(1792, 448) "movaps %%xmm0, (%4,%0) \n\t" "movaps %%xmm4, (%5,%0) \n\t" "add $16, %0 \n\t" "jl 1b \n\t" :"+&r"(count) :"r"(win1a), "r"(win2a), "r"(bufa), "r"(sum1a), "r"(sum2a) ); #undef MULT } static void apply_window_mp3(float *in, float *win, int *unused, float *out, ptrdiff_t incr) { LOCAL_ALIGNED_16(float, suma, [17]); LOCAL_ALIGNED_16(float, sumb, [17]); LOCAL_ALIGNED_16(float, sumc, [17]); LOCAL_ALIGNED_16(float, sumd, [17]); float sum; /* copy to avoid wrap */ __asm__ volatile( "movaps 0(%0), %%xmm0 \n\t" \ "movaps 16(%0), %%xmm1 \n\t" \ "movaps 32(%0), %%xmm2 \n\t" \ "movaps 48(%0), %%xmm3 \n\t" \ "movaps %%xmm0, 0(%1) \n\t" \ "movaps %%xmm1, 16(%1) \n\t" \ "movaps %%xmm2, 32(%1) \n\t" \ "movaps %%xmm3, 48(%1) \n\t" \ "movaps 64(%0), %%xmm0 \n\t" \ "movaps 80(%0), %%xmm1 \n\t" \ "movaps 96(%0), %%xmm2 \n\t" \ "movaps 112(%0), %%xmm3 \n\t" \ "movaps %%xmm0, 64(%1) \n\t" \ "movaps %%xmm1, 80(%1) \n\t" \ "movaps %%xmm2, 96(%1) \n\t" \ "movaps %%xmm3, 112(%1) \n\t" ::"r"(in), "r"(in+512) :"memory" ); apply_window(in + 16, win , win + 512, suma, sumc, 16); apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16); SUM8(MACS, suma[0], win + 32, in + 48); sumc[ 0] = 0; sumb[16] = 0; sumd[16] = 0; #define SUMS(suma, sumb, sumc, sumd, out1, out2) \ "movups " #sumd "(%4), %%xmm0 \n\t" \ "shufps $0x1b, %%xmm0, %%xmm0 \n\t" \ "subps " #suma "(%1), %%xmm0 \n\t" \ "movaps %%xmm0," #out1 "(%0) \n\t" \ \ "movups " #sumc "(%3), %%xmm0 \n\t" \ "shufps $0x1b, %%xmm0, %%xmm0 \n\t" \ "addps " #sumb "(%2), %%xmm0 \n\t" \ "movaps %%xmm0," #out2 "(%0) \n\t" if (incr == 1) { __asm__ volatile( SUMS( 0, 48, 4, 52, 0, 112) SUMS(16, 32, 20, 36, 16, 96) SUMS(32, 16, 36, 20, 32, 80) SUMS(48, 0, 52, 4, 48, 64) :"+&r"(out) :"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0]) :"memory" ); out += 16*incr; } else { int j; float *out2 = out + 32 * incr; out[0 ] = -suma[ 0]; out += incr; out2 -= incr; for(j=1;j<16;j++) { *out = -suma[ j] + sumd[16-j]; *out2 = sumb[16-j] + sumc[ j]; out += incr; out2 -= incr; } } sum = 0; SUM8(MLSS, sum, win + 16 + 32, in + 32); *out = sum; } #endif /* HAVE_SSE2_INLINE */ #if HAVE_X86ASM #define DECL_IMDCT_BLOCKS(CPU1, CPU2) \ static void imdct36_blocks_ ## CPU1(float *out, float *buf, float *in, \ int count, int switch_point, int block_type) \ { \ int align_end = count - (count & 3); \ int j; \ for (j = 0; j < align_end; j+= 4) { \ LOCAL_ALIGNED_16(float, tmpbuf, [1024]); \ float *win = mdct_win_sse[switch_point && j < 4][block_type]; \ /* apply window & overlap with previous buffer */ \ \ /* select window */ \ ff_four_imdct36_float_ ## CPU2(out, buf, in, win, tmpbuf); \ in += 4*18; \ buf += 4*18; \ out += 4; \ } \ for (; j < count; j++) { \ /* apply window & overlap with previous buffer */ \ \ /* select window */ \ int win_idx = (switch_point && j < 2) ? 0 : block_type; \ float *win = ff_mdct_win_float[win_idx + (4 & -(j & 1))]; \ \ ff_imdct36_float_ ## CPU1(out, buf, in, win); \ \ in += 18; \ buf++; \ out++; \ } \ } DECL_IMDCT_BLOCKS(sse,sse) DECL_IMDCT_BLOCKS(sse2,sse) DECL_IMDCT_BLOCKS(sse3,sse) DECL_IMDCT_BLOCKS(ssse3,sse) DECL_IMDCT_BLOCKS(avx,avx) #endif /* HAVE_X86ASM */ av_cold void ff_mpadsp_init_x86(MPADSPContext *s) { int cpu_flags = av_get_cpu_flags(); int i, j; for (j = 0; j < 4; j++) { for (i = 0; i < 40; i ++) { mdct_win_sse[0][j][4*i ] = ff_mdct_win_float[j ][i]; mdct_win_sse[0][j][4*i + 1] = ff_mdct_win_float[j + 4][i]; mdct_win_sse[0][j][4*i + 2] = ff_mdct_win_float[j ][i]; mdct_win_sse[0][j][4*i + 3] = ff_mdct_win_float[j + 4][i]; mdct_win_sse[1][j][4*i ] = ff_mdct_win_float[0 ][i]; mdct_win_sse[1][j][4*i + 1] = ff_mdct_win_float[4 ][i]; mdct_win_sse[1][j][4*i + 2] = ff_mdct_win_float[j ][i]; mdct_win_sse[1][j][4*i + 3] = ff_mdct_win_float[j + 4][i]; } } #if HAVE_SSE2_INLINE if (INLINE_SSE2(cpu_flags)) { s->apply_window_float = apply_window_mp3; } #endif /* HAVE_SSE2_INLINE */ #if HAVE_X86ASM if (EXTERNAL_SSE(cpu_flags)) { s->imdct36_blocks_float = imdct36_blocks_sse; } if (EXTERNAL_SSE2(cpu_flags)) { s->imdct36_blocks_float = imdct36_blocks_sse2; } if (EXTERNAL_SSE3(cpu_flags)) { s->imdct36_blocks_float = imdct36_blocks_sse3; } if (EXTERNAL_SSSE3(cpu_flags)) { s->imdct36_blocks_float = imdct36_blocks_ssse3; } if (EXTERNAL_AVX(cpu_flags)) { s->imdct36_blocks_float = imdct36_blocks_avx; } #endif /* HAVE_X86ASM */ }