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FFmpeg/libavcodec/x86/mpegaudiodec.c

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  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/attributes.h"

  23. #include "libavutil/cpu.h"

  24. #include "libavutil/x86/asm.h"

  25. #include "libavutil/x86/cpu.h"

  26. #include "libavcodec/dsputil.h"

  27. #include "libavcodec/mpegaudiodsp.h"

  28. 

  29. #define DECL(CPU)\

  30. static void imdct36_blocks_ ## CPU(float *out, float *buf, float *in, int count, int switch_point, int block_type);\

  31. void ff_imdct36_float_ ## CPU(float *out, float *buf, float *in, float *win);

  32. 

  33. DECL(sse)

  34. DECL(sse2)

  35. DECL(sse3)

  36. DECL(ssse3)

  37. DECL(avx)

  38. 

  39. void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win,

  40.                                float *tmpbuf);

  41. void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win,

  42.                                float *tmpbuf);

  43. 

  44. DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40];

  45. 

  46. #if HAVE_SSE2_INLINE

  47. 

  48. #define MACS(rt, ra, rb) rt+=(ra)*(rb)

  49. #define MLSS(rt, ra, rb) rt-=(ra)*(rb)

  50. 

  51. #define SUM8(op, sum, w, p)               \

  52. {                                         \

  53.     op(sum, (w)[0 * 64], (p)[0 * 64]);    \

  54.     op(sum, (w)[1 * 64], (p)[1 * 64]);    \

  55.     op(sum, (w)[2 * 64], (p)[2 * 64]);    \

  56.     op(sum, (w)[3 * 64], (p)[3 * 64]);    \

  57.     op(sum, (w)[4 * 64], (p)[4 * 64]);    \

  58.     op(sum, (w)[5 * 64], (p)[5 * 64]);    \

  59.     op(sum, (w)[6 * 64], (p)[6 * 64]);    \

  60.     op(sum, (w)[7 * 64], (p)[7 * 64]);    \

  61. }

  62. 

  63. static void apply_window(const float *buf, const float *win1,

  64.                          const float *win2, float *sum1, float *sum2, int len)

  65. {

  66.     x86_reg count = - 4*len;

  67.     const float *win1a = win1+len;

  68.     const float *win2a = win2+len;

  69.     const float *bufa  = buf+len;

  70.     float *sum1a = sum1+len;

  71.     float *sum2a = sum2+len;

  72. 

  73. 

  74. #define MULT(a, b)                                 \

  75.     "movaps " #a "(%1,%0), %%xmm1           \n\t"  \

  76.     "movaps " #a "(%3,%0), %%xmm2           \n\t"  \

  77.     "mulps         %%xmm2, %%xmm1           \n\t"  \

  78.     "subps         %%xmm1, %%xmm0           \n\t"  \

  79.     "mulps  " #b "(%2,%0), %%xmm2           \n\t"  \

  80.     "subps         %%xmm2, %%xmm4           \n\t"  \

  81. 

  82.     __asm__ volatile(

  83.             "1:                                   \n\t"

  84.             "xorps       %%xmm0, %%xmm0           \n\t"

  85.             "xorps       %%xmm4, %%xmm4           \n\t"

  86. 

  87.             MULT(   0,   0)

  88.             MULT( 256,  64)

  89.             MULT( 512, 128)

  90.             MULT( 768, 192)

  91.             MULT(1024, 256)

  92.             MULT(1280, 320)

  93.             MULT(1536, 384)

  94.             MULT(1792, 448)

  95. 

  96.             "movaps      %%xmm0, (%4,%0)          \n\t"

  97.             "movaps      %%xmm4, (%5,%0)          \n\t"

  98.             "add            $16,  %0              \n\t"

  99.             "jl              1b                   \n\t"

  100.             :"+&r"(count)

  101.             :"r"(win1a), "r"(win2a), "r"(bufa), "r"(sum1a), "r"(sum2a)

  102.             );

  103. 

  104. #undef MULT

  105. }

  106. 

  107. static void apply_window_mp3(float *in, float *win, int *unused, float *out,

  108.                              int incr)

  109. {

  110.     LOCAL_ALIGNED_16(float, suma, [17]);

  111.     LOCAL_ALIGNED_16(float, sumb, [17]);

  112.     LOCAL_ALIGNED_16(float, sumc, [17]);

  113.     LOCAL_ALIGNED_16(float, sumd, [17]);

  114. 

  115.     float sum;

  116. 

  117.     /* copy to avoid wrap */

  118.     __asm__ volatile(

  119.             "movaps    0(%0), %%xmm0   \n\t" \

  120.             "movaps   16(%0), %%xmm1   \n\t" \

  121.             "movaps   32(%0), %%xmm2   \n\t" \

  122.             "movaps   48(%0), %%xmm3   \n\t" \

  123.             "movaps   %%xmm0,   0(%1) \n\t" \

  124.             "movaps   %%xmm1,  16(%1) \n\t" \

  125.             "movaps   %%xmm2,  32(%1) \n\t" \

  126.             "movaps   %%xmm3,  48(%1) \n\t" \

  127.             "movaps   64(%0), %%xmm0   \n\t" \

  128.             "movaps   80(%0), %%xmm1   \n\t" \

  129.             "movaps   96(%0), %%xmm2   \n\t" \

  130.             "movaps  112(%0), %%xmm3   \n\t" \

  131.             "movaps   %%xmm0,  64(%1) \n\t" \

  132.             "movaps   %%xmm1,  80(%1) \n\t" \

  133.             "movaps   %%xmm2,  96(%1) \n\t" \

  134.             "movaps   %%xmm3, 112(%1) \n\t"

  135.             ::"r"(in), "r"(in+512)

  136.             :"memory"

  137.             );

  138. 

  139.     apply_window(in + 16, win     , win + 512, suma, sumc, 16);

  140.     apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16);

  141. 

  142.     SUM8(MACS, suma[0], win + 32, in + 48);

  143. 

  144.     sumc[ 0] = 0;

  145.     sumb[16] = 0;

  146.     sumd[16] = 0;

  147. 

  148. #define SUMS(suma, sumb, sumc, sumd, out1, out2)               \

  149.             "movups " #sumd "(%4),       %%xmm0          \n\t" \

  150.             "shufps         $0x1b,       %%xmm0, %%xmm0  \n\t" \

  151.             "subps  " #suma "(%1),       %%xmm0          \n\t" \

  152.             "movaps        %%xmm0," #out1 "(%0)          \n\t" \

  153. \

  154.             "movups " #sumc "(%3),       %%xmm0          \n\t" \

  155.             "shufps         $0x1b,       %%xmm0, %%xmm0  \n\t" \

  156.             "addps  " #sumb "(%2),       %%xmm0          \n\t" \

  157.             "movaps        %%xmm0," #out2 "(%0)          \n\t"

  158. 

  159.     if (incr == 1) {

  160.         __asm__ volatile(

  161.             SUMS( 0, 48,  4, 52,  0, 112)

  162.             SUMS(16, 32, 20, 36, 16,  96)

  163.             SUMS(32, 16, 36, 20, 32,  80)

  164.             SUMS(48,  0, 52,  4, 48,  64)

  165. 

  166.             :"+&r"(out)

  167.             :"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0])

  168.             :"memory"

  169.             );

  170.         out += 16*incr;

  171.     } else {

  172.         int j;

  173.         float *out2 = out + 32 * incr;

  174.         out[0  ]  = -suma[   0];

  175.         out += incr;

  176.         out2 -= incr;

  177.         for(j=1;j<16;j++) {

  178.             *out  = -suma[   j] + sumd[16-j];

  179.             *out2 =  sumb[16-j] + sumc[   j];

  180.             out  += incr;

  181.             out2 -= incr;

  182.         }

  183.     }

  184. 

  185.     sum = 0;

  186.     SUM8(MLSS, sum, win + 16 + 32, in + 32);

  187.     *out = sum;

  188. }

  189. 

  190. #endif /* HAVE_SSE2_INLINE */

  191. 

  192. #if HAVE_YASM

  193. #define DECL_IMDCT_BLOCKS(CPU1, CPU2)                                       \

  194. static void imdct36_blocks_ ## CPU1(float *out, float *buf, float *in,      \

  195.                                int count, int switch_point, int block_type) \

  196. {                                                                           \

  197.     int align_end = count - (count & 3);                                \

  198.     int j;                                                              \

  199.     for (j = 0; j < align_end; j+= 4) {                                 \

  200.         LOCAL_ALIGNED_16(float, tmpbuf, [1024]);                        \

  201.         float *win = mdct_win_sse[switch_point && j < 4][block_type];   \

  202.         /* apply window & overlap with previous buffer */               \

  203.                                                                         \

  204.         /* select window */                                             \

  205.         ff_four_imdct36_float_ ## CPU2(out, buf, in, win, tmpbuf);      \

  206.         in      += 4*18;                                                \

  207.         buf     += 4*18;                                                \

  208.         out     += 4;                                                   \

  209.     }                                                                   \

  210.     for (; j < count; j++) {                                            \

  211.         /* apply window & overlap with previous buffer */               \

  212.                                                                         \

  213.         /* select window */                                             \

  214.         int win_idx = (switch_point && j < 2) ? 0 : block_type;         \

  215.         float *win = ff_mdct_win_float[win_idx + (4 & -(j & 1))];       \

  216.                                                                         \

  217.         ff_imdct36_float_ ## CPU1(out, buf, in, win);                   \

  218.                                                                         \

  219.         in  += 18;                                                      \

  220.         buf++;                                                          \

  221.         out++;                                                          \

  222.     }                                                                   \

  223. }

  224. 

  225. #if HAVE_SSE

  226. DECL_IMDCT_BLOCKS(sse,sse)

  227. DECL_IMDCT_BLOCKS(sse2,sse)

  228. DECL_IMDCT_BLOCKS(sse3,sse)

  229. DECL_IMDCT_BLOCKS(ssse3,sse)

  230. #endif

  231. #if HAVE_AVX_EXTERNAL

  232. DECL_IMDCT_BLOCKS(avx,avx)

  233. #endif

  234. #endif /* HAVE_YASM */

  235. 

  236. av_cold void ff_mpadsp_init_x86(MPADSPContext *s)

  237. {

  238.     int mm_flags = av_get_cpu_flags();

  239. 

  240.     int i, j;

  241.     for (j = 0; j < 4; j++) {

  242.         for (i = 0; i < 40; i ++) {

  243.             mdct_win_sse[0][j][4*i    ] = ff_mdct_win_float[j    ][i];

  244.             mdct_win_sse[0][j][4*i + 1] = ff_mdct_win_float[j + 4][i];

  245.             mdct_win_sse[0][j][4*i + 2] = ff_mdct_win_float[j    ][i];

  246.             mdct_win_sse[0][j][4*i + 3] = ff_mdct_win_float[j + 4][i];

  247.             mdct_win_sse[1][j][4*i    ] = ff_mdct_win_float[0    ][i];

  248.             mdct_win_sse[1][j][4*i + 1] = ff_mdct_win_float[4    ][i];

  249.             mdct_win_sse[1][j][4*i + 2] = ff_mdct_win_float[j    ][i];

  250.             mdct_win_sse[1][j][4*i + 3] = ff_mdct_win_float[j + 4][i];

  251.         }

  252.     }

  253. 

  254. #if HAVE_SSE2_INLINE

  255.     if (mm_flags & AV_CPU_FLAG_SSE2) {

  256.         s->apply_window_float = apply_window_mp3;

  257.     }

  258. #endif /* HAVE_SSE2_INLINE */

  259. 

  260. #if HAVE_YASM

  261.     if (EXTERNAL_AVX(mm_flags)) {

  262.         s->imdct36_blocks_float = imdct36_blocks_avx;

  263.     } else if (EXTERNAL_SSSE3(mm_flags)) {

  264.         s->imdct36_blocks_float = imdct36_blocks_ssse3;

  265.     } else if (EXTERNAL_SSE3(mm_flags)) {

  266.         s->imdct36_blocks_float = imdct36_blocks_sse3;

  267.     } else if (EXTERNAL_SSE2(mm_flags)) {

  268.         s->imdct36_blocks_float = imdct36_blocks_sse2;

  269.     } else if (EXTERNAL_SSE(mm_flags)) {

  270.         s->imdct36_blocks_float = imdct36_blocks_sse;

  271.     }

  272. #endif /* HAVE_YASM */

  273. }