git.sesse.net Git - ffmpeg/blob - libavcodec/x86/mpegaudiodec_mmx.c

   1 /*
   2  * MMX optimized MP3 decoding functions
   3  * Copyright (c) 2010 Vitor Sessak
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/cpu.h"
  23 #include "libavutil/x86_cpu.h"
  24 #include "libavcodec/dsputil.h"
  25 #include "libavcodec/mpegaudiodsp.h"
  26
  27 void ff_imdct36_float_sse(float *out, float *buf, float *in, float *win);
  28 void ff_imdct36_float_sse2(float *out, float *buf, float *in, float *win);
  29 void ff_imdct36_float_sse3(float *out, float *buf, float *in, float *win);
  30 void ff_imdct36_float_ssse3(float *out, float *buf, float *in, float *win);
  31 void ff_imdct36_float_avx(float *out, float *buf, float *in, float *win);
  32 void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win,
  33                                float *tmpbuf);
  34 void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win,
  35                                float *tmpbuf);
  36
  37 DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40];
  38
  39 #define MACS(rt, ra, rb) rt+=(ra)*(rb)
  40 #define MLSS(rt, ra, rb) rt-=(ra)*(rb)
  41
  42 #define SUM8(op, sum, w, p)               \
  43 {                                         \
  44     op(sum, (w)[0 * 64], (p)[0 * 64]);    \
  45     op(sum, (w)[1 * 64], (p)[1 * 64]);    \
  46     op(sum, (w)[2 * 64], (p)[2 * 64]);    \
  47     op(sum, (w)[3 * 64], (p)[3 * 64]);    \
  48     op(sum, (w)[4 * 64], (p)[4 * 64]);    \
  49     op(sum, (w)[5 * 64], (p)[5 * 64]);    \
  50     op(sum, (w)[6 * 64], (p)[6 * 64]);    \
  51     op(sum, (w)[7 * 64], (p)[7 * 64]);    \
  52 }
  53
  54 static void apply_window(const float *buf, const float *win1,
  55                          const float *win2, float *sum1, float *sum2, int len)
  56 {
  57     x86_reg count = - 4*len;
  58     const float *win1a = win1+len;
  59     const float *win2a = win2+len;
  60     const float *bufa  = buf+len;
  61     float *sum1a = sum1+len;
  62     float *sum2a = sum2+len;
  63
  64
  65 #define MULT(a, b)                                 \
  66     "movaps " #a "(%1,%0), %%xmm1           \n\t"  \
  67     "movaps " #a "(%3,%0), %%xmm2           \n\t"  \
  68     "mulps         %%xmm2, %%xmm1           \n\t"  \
  69     "subps         %%xmm1, %%xmm0           \n\t"  \
  70     "mulps  " #b "(%2,%0), %%xmm2           \n\t"  \
  71     "subps         %%xmm2, %%xmm4           \n\t"  \
  72
  73     __asm__ volatile(
  74             "1:                                   \n\t"
  75             "xorps       %%xmm0, %%xmm0           \n\t"
  76             "xorps       %%xmm4, %%xmm4           \n\t"
  77
  78             MULT(   0,   0)
  79             MULT( 256,  64)
  80             MULT( 512, 128)
  81             MULT( 768, 192)
  82             MULT(1024, 256)
  83             MULT(1280, 320)
  84             MULT(1536, 384)
  85             MULT(1792, 448)
  86
  87             "movaps      %%xmm0, (%4,%0)          \n\t"
  88             "movaps      %%xmm4, (%5,%0)          \n\t"
  89             "add            $16,  %0              \n\t"
  90             "jl              1b                   \n\t"
  91             :"+&r"(count)
  92             :"r"(win1a), "r"(win2a), "r"(bufa), "r"(sum1a), "r"(sum2a)
  93             );
  94
  95 #undef MULT
  96 }
  97
  98 static void apply_window_mp3(float *in, float *win, int *unused, float *out,
  99                              int incr)
 100 {
 101     LOCAL_ALIGNED_16(float, suma, [17]);
 102     LOCAL_ALIGNED_16(float, sumb, [17]);
 103     LOCAL_ALIGNED_16(float, sumc, [17]);
 104     LOCAL_ALIGNED_16(float, sumd, [17]);
 105
 106     float sum;
 107
 108     /* copy to avoid wrap */
 109     __asm__ volatile(
 110             "movaps    0(%0), %%xmm0   \n\t" \
 111             "movaps   16(%0), %%xmm1   \n\t" \
 112             "movaps   32(%0), %%xmm2   \n\t" \
 113             "movaps   48(%0), %%xmm3   \n\t" \
 114             "movaps   %%xmm0,   0(%1) \n\t" \
 115             "movaps   %%xmm1,  16(%1) \n\t" \
 116             "movaps   %%xmm2,  32(%1) \n\t" \
 117             "movaps   %%xmm3,  48(%1) \n\t" \
 118             "movaps   64(%0), %%xmm0   \n\t" \
 119             "movaps   80(%0), %%xmm1   \n\t" \
 120             "movaps   96(%0), %%xmm2   \n\t" \
 121             "movaps  112(%0), %%xmm3   \n\t" \
 122             "movaps   %%xmm0,  64(%1) \n\t" \
 123             "movaps   %%xmm1,  80(%1) \n\t" \
 124             "movaps   %%xmm2,  96(%1) \n\t" \
 125             "movaps   %%xmm3, 112(%1) \n\t"
 126             ::"r"(in), "r"(in+512)
 127             :"memory"
 128             );
 129
 130     apply_window(in + 16, win     , win + 512, suma, sumc, 16);
 131     apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16);
 132
 133     SUM8(MACS, suma[0], win + 32, in + 48);
 134
 135     sumc[ 0] = 0;
 136     sumb[16] = 0;
 137     sumd[16] = 0;
 138
 139 #define SUMS(suma, sumb, sumc, sumd, out1, out2)               \
 140             "movups " #sumd "(%4),       %%xmm0          \n\t" \
 141             "shufps         $0x1b,       %%xmm0, %%xmm0  \n\t" \
 142             "subps  " #suma "(%1),       %%xmm0          \n\t" \
 143             "movaps        %%xmm0," #out1 "(%0)          \n\t" \
 144 \
 145             "movups " #sumc "(%3),       %%xmm0          \n\t" \
 146             "shufps         $0x1b,       %%xmm0, %%xmm0  \n\t" \
 147             "addps  " #sumb "(%2),       %%xmm0          \n\t" \
 148             "movaps        %%xmm0," #out2 "(%0)          \n\t"
 149
 150     if (incr == 1) {
 151         __asm__ volatile(
 152             SUMS( 0, 48,  4, 52,  0, 112)
 153             SUMS(16, 32, 20, 36, 16,  96)
 154             SUMS(32, 16, 36, 20, 32,  80)
 155             SUMS(48,  0, 52,  4, 48,  64)
 156
 157             :"+&r"(out)
 158             :"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0])
 159             :"memory"
 160             );
 161         out += 16*incr;
 162     } else {
 163         int j;
 164         float *out2 = out + 32 * incr;
 165         out[0  ]  = -suma[   0];
 166         out += incr;
 167         out2 -= incr;
 168         for(j=1;j<16;j++) {
 169             *out  = -suma[   j] + sumd[16-j];
 170             *out2 =  sumb[16-j] + sumc[   j];
 171             out  += incr;
 172             out2 -= incr;
 173         }
 174     }
 175
 176     sum = 0;
 177     SUM8(MLSS, sum, win + 16 + 32, in + 32);
 178     *out = sum;
 179 }
 180
 181
 182 #define DECL_IMDCT_BLOCKS(CPU1, CPU2)                                       \
 183 static void imdct36_blocks_ ## CPU1(float *out, float *buf, float *in,      \
 184                                int count, int switch_point, int block_type) \
 185 {                                                                           \
 186     int align_end = count - (count & 3);                                \
 187     int j;                                                              \
 188     for (j = 0; j < align_end; j+= 4) {                                 \
 189         LOCAL_ALIGNED_16(float, tmpbuf, [1024]);                        \
 190         float *win = mdct_win_sse[switch_point && j < 4][block_type];   \
 191         /* apply window & overlap with previous buffer */               \
 192                                                                         \
 193         /* select window */                                             \
 194         ff_four_imdct36_float_ ## CPU2(out, buf, in, win, tmpbuf);      \
 195         in      += 4*18;                                                \
 196         buf     += 4*18;                                                \
 197         out     += 4;                                                   \
 198     }                                                                   \
 199     for (; j < count; j++) {                                            \
 200         /* apply window & overlap with previous buffer */               \
 201                                                                         \
 202         /* select window */                                             \
 203         int win_idx = (switch_point && j < 2) ? 0 : block_type;         \
 204         float *win = ff_mdct_win_float[win_idx + (4 & -(j & 1))];       \
 205                                                                         \
 206         ff_imdct36_float_ ## CPU1(out, buf, in, win);                   \
 207                                                                         \
 208         in  += 18;                                                      \
 209         buf++;                                                          \
 210         out++;                                                          \
 211     }                                                                   \
 212 }
 213
 214 #if HAVE_YASM
 215 #if HAVE_SSE
 216 DECL_IMDCT_BLOCKS(sse,sse)
 217 DECL_IMDCT_BLOCKS(sse2,sse)
 218 DECL_IMDCT_BLOCKS(sse3,sse)
 219 DECL_IMDCT_BLOCKS(ssse3,sse)
 220 #endif
 221 #if HAVE_AVX
 222 DECL_IMDCT_BLOCKS(avx,avx)
 223 #endif
 224 #endif
 225
 226 void ff_mpadsp_init_mmx(MPADSPContext *s)
 227 {
 228     int mm_flags = av_get_cpu_flags();
 229
 230     int i, j;
 231     for (j = 0; j < 4; j++) {
 232         for (i = 0; i < 40; i ++) {
 233             mdct_win_sse[0][j][4*i    ] = ff_mdct_win_float[j    ][i];
 234             mdct_win_sse[0][j][4*i + 1] = ff_mdct_win_float[j + 4][i];
 235             mdct_win_sse[0][j][4*i + 2] = ff_mdct_win_float[j    ][i];
 236             mdct_win_sse[0][j][4*i + 3] = ff_mdct_win_float[j + 4][i];
 237             mdct_win_sse[1][j][4*i    ] = ff_mdct_win_float[0    ][i];
 238             mdct_win_sse[1][j][4*i + 1] = ff_mdct_win_float[4    ][i];
 239             mdct_win_sse[1][j][4*i + 2] = ff_mdct_win_float[j    ][i];
 240             mdct_win_sse[1][j][4*i + 3] = ff_mdct_win_float[j + 4][i];
 241         }
 242     }
 243
 244     if (mm_flags & AV_CPU_FLAG_SSE2) {
 245         s->apply_window_float = apply_window_mp3;
 246     }
 247 #if HAVE_YASM
 248     if (0) {
 249 #if HAVE_AVX
 250     } else if (mm_flags & AV_CPU_FLAG_AVX && HAVE_AVX) {
 251         s->imdct36_blocks_float = imdct36_blocks_avx;
 252 #endif
 253 #if HAVE_SSE
 254     } else if (mm_flags & AV_CPU_FLAG_SSSE3) {
 255         s->imdct36_blocks_float = imdct36_blocks_ssse3;
 256     } else if (mm_flags & AV_CPU_FLAG_SSE3) {
 257         s->imdct36_blocks_float = imdct36_blocks_sse3;
 258     } else if (mm_flags & AV_CPU_FLAG_SSE2) {
 259         s->imdct36_blocks_float = imdct36_blocks_sse2;
 260     } else if (mm_flags & AV_CPU_FLAG_SSE) {
 261         s->imdct36_blocks_float = imdct36_blocks_sse;
 262 #endif /* HAVE_SSE */
 263     }
 264 #endif /* HAVE_YASM */
 265 }