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263 lines
10 KiB
263 lines
10 KiB
/* |
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* MMX optimized MP3 decoding functions |
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* Copyright (c) 2010 Vitor Sessak |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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/cpu.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/dsputil.h" |
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#include "libavcodec/mpegaudiodsp.h" |
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void ff_imdct36_float_sse(float *out, float *buf, float *in, float *win); |
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void ff_imdct36_float_sse2(float *out, float *buf, float *in, float *win); |
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void ff_imdct36_float_sse3(float *out, float *buf, float *in, float *win); |
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void ff_imdct36_float_ssse3(float *out, float *buf, float *in, float *win); |
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void ff_imdct36_float_avx(float *out, float *buf, float *in, float *win); |
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void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win, |
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float *tmpbuf); |
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void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win, |
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float *tmpbuf); |
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DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40]; |
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#if HAVE_SSE2_INLINE |
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#define MACS(rt, ra, rb) rt+=(ra)*(rb) |
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#define MLSS(rt, ra, rb) rt-=(ra)*(rb) |
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#define SUM8(op, sum, w, p) \ |
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{ \ |
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op(sum, (w)[0 * 64], (p)[0 * 64]); \ |
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op(sum, (w)[1 * 64], (p)[1 * 64]); \ |
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op(sum, (w)[2 * 64], (p)[2 * 64]); \ |
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op(sum, (w)[3 * 64], (p)[3 * 64]); \ |
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op(sum, (w)[4 * 64], (p)[4 * 64]); \ |
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op(sum, (w)[5 * 64], (p)[5 * 64]); \ |
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op(sum, (w)[6 * 64], (p)[6 * 64]); \ |
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op(sum, (w)[7 * 64], (p)[7 * 64]); \ |
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} |
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static void apply_window(const float *buf, const float *win1, |
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const float *win2, float *sum1, float *sum2, int len) |
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{ |
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x86_reg count = - 4*len; |
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const float *win1a = win1+len; |
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const float *win2a = win2+len; |
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const float *bufa = buf+len; |
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float *sum1a = sum1+len; |
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float *sum2a = sum2+len; |
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#define MULT(a, b) \ |
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"movaps " #a "(%1,%0), %%xmm1 \n\t" \ |
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"movaps " #a "(%3,%0), %%xmm2 \n\t" \ |
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"mulps %%xmm2, %%xmm1 \n\t" \ |
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"subps %%xmm1, %%xmm0 \n\t" \ |
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"mulps " #b "(%2,%0), %%xmm2 \n\t" \ |
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"subps %%xmm2, %%xmm4 \n\t" \ |
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__asm__ volatile( |
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"1: \n\t" |
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"xorps %%xmm0, %%xmm0 \n\t" |
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"xorps %%xmm4, %%xmm4 \n\t" |
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MULT( 0, 0) |
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MULT( 256, 64) |
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MULT( 512, 128) |
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MULT( 768, 192) |
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MULT(1024, 256) |
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MULT(1280, 320) |
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MULT(1536, 384) |
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MULT(1792, 448) |
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"movaps %%xmm0, (%4,%0) \n\t" |
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"movaps %%xmm4, (%5,%0) \n\t" |
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"add $16, %0 \n\t" |
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"jl 1b \n\t" |
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:"+&r"(count) |
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:"r"(win1a), "r"(win2a), "r"(bufa), "r"(sum1a), "r"(sum2a) |
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); |
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#undef MULT |
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} |
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static void apply_window_mp3(float *in, float *win, int *unused, float *out, |
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int incr) |
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{ |
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LOCAL_ALIGNED_16(float, suma, [17]); |
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LOCAL_ALIGNED_16(float, sumb, [17]); |
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LOCAL_ALIGNED_16(float, sumc, [17]); |
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LOCAL_ALIGNED_16(float, sumd, [17]); |
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float sum; |
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/* copy to avoid wrap */ |
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__asm__ volatile( |
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"movaps 0(%0), %%xmm0 \n\t" \ |
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"movaps 16(%0), %%xmm1 \n\t" \ |
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"movaps 32(%0), %%xmm2 \n\t" \ |
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"movaps 48(%0), %%xmm3 \n\t" \ |
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"movaps %%xmm0, 0(%1) \n\t" \ |
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"movaps %%xmm1, 16(%1) \n\t" \ |
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"movaps %%xmm2, 32(%1) \n\t" \ |
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"movaps %%xmm3, 48(%1) \n\t" \ |
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"movaps 64(%0), %%xmm0 \n\t" \ |
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"movaps 80(%0), %%xmm1 \n\t" \ |
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"movaps 96(%0), %%xmm2 \n\t" \ |
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"movaps 112(%0), %%xmm3 \n\t" \ |
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"movaps %%xmm0, 64(%1) \n\t" \ |
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"movaps %%xmm1, 80(%1) \n\t" \ |
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"movaps %%xmm2, 96(%1) \n\t" \ |
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"movaps %%xmm3, 112(%1) \n\t" |
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::"r"(in), "r"(in+512) |
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:"memory" |
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); |
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apply_window(in + 16, win , win + 512, suma, sumc, 16); |
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apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16); |
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SUM8(MACS, suma[0], win + 32, in + 48); |
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sumc[ 0] = 0; |
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sumb[16] = 0; |
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sumd[16] = 0; |
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#define SUMS(suma, sumb, sumc, sumd, out1, out2) \ |
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"movups " #sumd "(%4), %%xmm0 \n\t" \ |
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"shufps $0x1b, %%xmm0, %%xmm0 \n\t" \ |
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"subps " #suma "(%1), %%xmm0 \n\t" \ |
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"movaps %%xmm0," #out1 "(%0) \n\t" \ |
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\ |
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"movups " #sumc "(%3), %%xmm0 \n\t" \ |
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"shufps $0x1b, %%xmm0, %%xmm0 \n\t" \ |
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"addps " #sumb "(%2), %%xmm0 \n\t" \ |
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"movaps %%xmm0," #out2 "(%0) \n\t" |
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if (incr == 1) { |
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__asm__ volatile( |
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SUMS( 0, 48, 4, 52, 0, 112) |
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SUMS(16, 32, 20, 36, 16, 96) |
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SUMS(32, 16, 36, 20, 32, 80) |
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SUMS(48, 0, 52, 4, 48, 64) |
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:"+&r"(out) |
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:"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0]) |
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:"memory" |
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); |
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out += 16*incr; |
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} else { |
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int j; |
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float *out2 = out + 32 * incr; |
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out[0 ] = -suma[ 0]; |
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out += incr; |
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out2 -= incr; |
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for(j=1;j<16;j++) { |
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*out = -suma[ j] + sumd[16-j]; |
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*out2 = sumb[16-j] + sumc[ j]; |
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out += incr; |
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out2 -= incr; |
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} |
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} |
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sum = 0; |
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SUM8(MLSS, sum, win + 16 + 32, in + 32); |
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*out = sum; |
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} |
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#endif /* HAVE_SSE2_INLINE */ |
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#if HAVE_YASM |
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#define DECL_IMDCT_BLOCKS(CPU1, CPU2) \ |
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static void imdct36_blocks_ ## CPU1(float *out, float *buf, float *in, \ |
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int count, int switch_point, int block_type) \ |
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{ \ |
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int align_end = count - (count & 3); \ |
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int j; \ |
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for (j = 0; j < align_end; j+= 4) { \ |
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LOCAL_ALIGNED_16(float, tmpbuf, [1024]); \ |
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float *win = mdct_win_sse[switch_point && j < 4][block_type]; \ |
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/* apply window & overlap with previous buffer */ \ |
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\ |
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/* select window */ \ |
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ff_four_imdct36_float_ ## CPU2(out, buf, in, win, tmpbuf); \ |
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in += 4*18; \ |
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buf += 4*18; \ |
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out += 4; \ |
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} \ |
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for (; j < count; j++) { \ |
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/* apply window & overlap with previous buffer */ \ |
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\ |
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/* select window */ \ |
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int win_idx = (switch_point && j < 2) ? 0 : block_type; \ |
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float *win = ff_mdct_win_float[win_idx + (4 & -(j & 1))]; \ |
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\ |
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ff_imdct36_float_ ## CPU1(out, buf, in, win); \ |
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\ |
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in += 18; \ |
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buf++; \ |
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out++; \ |
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} \ |
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} |
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DECL_IMDCT_BLOCKS(sse,sse) |
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DECL_IMDCT_BLOCKS(sse2,sse) |
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DECL_IMDCT_BLOCKS(sse3,sse) |
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DECL_IMDCT_BLOCKS(ssse3,sse) |
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DECL_IMDCT_BLOCKS(avx,avx) |
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#endif /* HAVE_YASM */ |
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void ff_mpadsp_init_mmx(MPADSPContext *s) |
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{ |
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int mm_flags = av_get_cpu_flags(); |
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int i, j; |
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for (j = 0; j < 4; j++) { |
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for (i = 0; i < 40; i ++) { |
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mdct_win_sse[0][j][4*i ] = ff_mdct_win_float[j ][i]; |
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mdct_win_sse[0][j][4*i + 1] = ff_mdct_win_float[j + 4][i]; |
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mdct_win_sse[0][j][4*i + 2] = ff_mdct_win_float[j ][i]; |
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mdct_win_sse[0][j][4*i + 3] = ff_mdct_win_float[j + 4][i]; |
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mdct_win_sse[1][j][4*i ] = ff_mdct_win_float[0 ][i]; |
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mdct_win_sse[1][j][4*i + 1] = ff_mdct_win_float[4 ][i]; |
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mdct_win_sse[1][j][4*i + 2] = ff_mdct_win_float[j ][i]; |
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mdct_win_sse[1][j][4*i + 3] = ff_mdct_win_float[j + 4][i]; |
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} |
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} |
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#if HAVE_SSE2_INLINE |
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if (mm_flags & AV_CPU_FLAG_SSE2) { |
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s->apply_window_float = apply_window_mp3; |
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} |
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#endif /* HAVE_SSE2_INLINE */ |
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#if HAVE_YASM |
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if (EXTERNAL_AVX(mm_flags)) { |
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s->imdct36_blocks_float = imdct36_blocks_avx; |
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} else if (EXTERNAL_SSSE3(mm_flags)) { |
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s->imdct36_blocks_float = imdct36_blocks_ssse3; |
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} else if (EXTERNAL_SSE3(mm_flags)) { |
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s->imdct36_blocks_float = imdct36_blocks_sse3; |
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} else if (EXTERNAL_SSE2(mm_flags)) { |
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s->imdct36_blocks_float = imdct36_blocks_sse2; |
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} else if (EXTERNAL_SSE(mm_flags)) { |
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s->imdct36_blocks_float = imdct36_blocks_sse; |
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} |
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#endif /* HAVE_YASM */ |
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}
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