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FFmpeg/libavcodec/i386/mpegvideo_mmx_template.c

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  1. /*

  2.  * MPEG video MMX templates

  3.  *

  4.  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * This library is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2 of the License, or (at your option) any later version.

  10.  *

  11.  * This library is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with this library; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. #undef SPREADW

  21. #undef PMAXW

  22. #ifdef HAVE_MMX2

  23. #define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"

  24. #define PMAXW(a,b) "pmaxsw " #a ", " #b "     \n\t"

  25. #define PMAX(a,b) \

  26.             "pshufw $0x0E," #a ", " #b "        \n\t"\

  27.             PMAXW(b, a)\

  28.             "pshufw $0x01," #a ", " #b "        \n\t"\

  29.             PMAXW(b, a)

  30. #else

  31. #define SPREADW(a) \

  32.         "punpcklwd " #a ", " #a " \n\t"\

  33.         "punpcklwd " #a ", " #a " \n\t"

  34. #define PMAXW(a,b) \

  35.         "psubusw " #a ", " #b " \n\t"\

  36.         "paddw " #a ", " #b "   \n\t"

  37. #define PMAX(a,b)  \

  38.             "movq " #a ", " #b "                \n\t"\

  39.             "psrlq $32, " #a "                  \n\t"\

  40.             PMAXW(b, a)\

  41.             "movq " #a ", " #b "                \n\t"\

  42.             "psrlq $16, " #a "                  \n\t"\

  43.             PMAXW(b, a)

  44. 

  45. #endif

  46. 

  47. static int RENAME(dct_quantize)(MpegEncContext *s,

  48.                             DCTELEM *block, int n,

  49.                             int qscale, int *overflow)

  50. {

  51.     long last_non_zero_p1;

  52.     int level=0, q; //=0 is cuz gcc says uninitalized ...

  53.     const uint16_t *qmat, *bias;

  54.     __align8 int16_t temp_block[64];

  55. 

  56.     assert((7&(int)(&temp_block[0])) == 0); //did gcc align it correctly?

  57. 

  58.     //s->fdct (block);

  59.     RENAMEl(ff_fdct) (block); //cant be anything else ...

  60. 

  61.     if(s->dct_error_sum)

  62.         s->denoise_dct(s, block);

  63. 

  64.     if (s->mb_intra) {

  65.         int dummy;

  66.         if (n < 4)

  67.             q = s->y_dc_scale;

  68.         else

  69.             q = s->c_dc_scale;

  70.         /* note: block[0] is assumed to be positive */

  71.         if (!s->h263_aic) {

  72. #if 1

  73.         asm volatile (

  74.                 "mul %%ecx                \n\t"

  75.                 : "=d" (level), "=a"(dummy)

  76.                 : "a" ((block[0]>>2) + q), "c" (inverse[q<<1])

  77.         );

  78. #else

  79.         asm volatile (

  80.                 "xorl %%edx, %%edx        \n\t"

  81.                 "divw %%cx                \n\t"

  82.                 "movzwl %%ax, %%eax       \n\t"

  83.                 : "=a" (level)

  84.                 : "a" ((block[0]>>2) + q), "c" (q<<1)

  85.                 : "%edx"

  86.         );

  87. #endif

  88.         } else

  89.             /* For AIC we skip quant/dequant of INTRADC */

  90.             level = (block[0] + 4)>>3;

  91. 

  92.         block[0]=0; //avoid fake overflow

  93. //        temp_block[0] = (block[0] + (q >> 1)) / q;

  94.         last_non_zero_p1 = 1;

  95.         bias = s->q_intra_matrix16[qscale][1];

  96.         qmat = s->q_intra_matrix16[qscale][0];

  97.     } else {

  98.         last_non_zero_p1 = 0;

  99.         bias = s->q_inter_matrix16[qscale][1];

  100.         qmat = s->q_inter_matrix16[qscale][0];

  101.     }

  102. 

  103.     if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){

  104. 

  105.         asm volatile(

  106.             "movd %%"REG_a", %%mm3              \n\t" // last_non_zero_p1

  107.             SPREADW(%%mm3)

  108.             "pxor %%mm7, %%mm7                  \n\t" // 0

  109.             "pxor %%mm4, %%mm4                  \n\t" // 0

  110.             "movq (%2), %%mm5                   \n\t" // qmat[0]

  111.             "pxor %%mm6, %%mm6                  \n\t"

  112.             "psubw (%3), %%mm6                  \n\t" // -bias[0]

  113.             "mov $-128, %%"REG_a"               \n\t"

  114.             ".balign 16                         \n\t"

  115.             "1:                                 \n\t"

  116.             "pxor %%mm1, %%mm1                  \n\t" // 0

  117.             "movq (%1, %%"REG_a"), %%mm0        \n\t" // block[i]

  118.             "pcmpgtw %%mm0, %%mm1               \n\t" // block[i] <= 0 ? 0xFF : 0x00

  119.             "pxor %%mm1, %%mm0                  \n\t"

  120.             "psubw %%mm1, %%mm0                 \n\t" // ABS(block[i])

  121.             "psubusw %%mm6, %%mm0               \n\t" // ABS(block[i]) + bias[0]

  122.             "pmulhw %%mm5, %%mm0                \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16

  123.             "por %%mm0, %%mm4                   \n\t"

  124.             "pxor %%mm1, %%mm0                  \n\t"

  125.             "psubw %%mm1, %%mm0                 \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  126.             "movq %%mm0, (%5, %%"REG_a")        \n\t"

  127.             "pcmpeqw %%mm7, %%mm0               \n\t" // out==0 ? 0xFF : 0x00

  128.             "movq (%4, %%"REG_a"), %%mm1        \n\t"

  129.             "movq %%mm7, (%1, %%"REG_a")        \n\t" // 0

  130.             "pandn %%mm1, %%mm0                 \n\t"

  131.             PMAXW(%%mm0, %%mm3)

  132.             "add $8, %%"REG_a"                  \n\t"

  133.             " js 1b                             \n\t"

  134.             PMAX(%%mm3, %%mm0)

  135.             "movd %%mm3, %%"REG_a"              \n\t"

  136.             "movzb %%al, %%"REG_a"              \n\t" // last_non_zero_p1

  137.             : "+a" (last_non_zero_p1)

  138.             : "r" (block+64), "r" (qmat), "r" (bias),

  139.               "r" (inv_zigzag_direct16+64), "r" (temp_block+64)

  140.         );

  141.         // note the asm is split cuz gcc doesnt like that many operands ...

  142.         asm volatile(

  143.             "movd %1, %%mm1                     \n\t" // max_qcoeff

  144.             SPREADW(%%mm1)

  145.             "psubusw %%mm1, %%mm4               \n\t"

  146.             "packuswb %%mm4, %%mm4              \n\t"

  147.             "movd %%mm4, %0                     \n\t" // *overflow

  148.         : "=g" (*overflow)

  149.         : "g" (s->max_qcoeff)

  150.         );

  151.     }else{ // FMT_H263

  152.         asm volatile(

  153.             "movd %%"REG_a", %%mm3              \n\t" // last_non_zero_p1

  154.             SPREADW(%%mm3)

  155.             "pxor %%mm7, %%mm7                  \n\t" // 0

  156.             "pxor %%mm4, %%mm4                  \n\t" // 0

  157.             "mov $-128, %%"REG_a"               \n\t"

  158.             ".balign 16                         \n\t"

  159.             "1:                                 \n\t"

  160.             "pxor %%mm1, %%mm1                  \n\t" // 0

  161.             "movq (%1, %%"REG_a"), %%mm0        \n\t" // block[i]

  162.             "pcmpgtw %%mm0, %%mm1               \n\t" // block[i] <= 0 ? 0xFF : 0x00

  163.             "pxor %%mm1, %%mm0                  \n\t"

  164.             "psubw %%mm1, %%mm0                 \n\t" // ABS(block[i])

  165.             "movq (%3, %%"REG_a"), %%mm6        \n\t" // bias[0]

  166.             "paddusw %%mm6, %%mm0               \n\t" // ABS(block[i]) + bias[0]

  167.             "movq (%2, %%"REG_a"), %%mm5        \n\t" // qmat[i]

  168.             "pmulhw %%mm5, %%mm0                \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16

  169.             "por %%mm0, %%mm4                   \n\t"

  170.             "pxor %%mm1, %%mm0                  \n\t"

  171.             "psubw %%mm1, %%mm0                 \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  172.             "movq %%mm0, (%5, %%"REG_a")        \n\t"

  173.             "pcmpeqw %%mm7, %%mm0               \n\t" // out==0 ? 0xFF : 0x00

  174.             "movq (%4, %%"REG_a"), %%mm1        \n\t"

  175.             "movq %%mm7, (%1, %%"REG_a")        \n\t" // 0

  176.             "pandn %%mm1, %%mm0                 \n\t"

  177.             PMAXW(%%mm0, %%mm3)

  178.             "add $8, %%"REG_a"                  \n\t"

  179.             " js 1b                             \n\t"

  180.             PMAX(%%mm3, %%mm0)

  181.             "movd %%mm3, %%"REG_a"              \n\t"

  182.             "movzb %%al, %%"REG_a"              \n\t" // last_non_zero_p1

  183.             : "+a" (last_non_zero_p1)

  184.             : "r" (block+64), "r" (qmat+64), "r" (bias+64),

  185.               "r" (inv_zigzag_direct16+64), "r" (temp_block+64)

  186.         );

  187.         // note the asm is split cuz gcc doesnt like that many operands ...

  188.         asm volatile(

  189.             "movd %1, %%mm1                     \n\t" // max_qcoeff

  190.             SPREADW(%%mm1)

  191.             "psubusw %%mm1, %%mm4               \n\t"

  192.             "packuswb %%mm4, %%mm4              \n\t"

  193.             "movd %%mm4, %0                     \n\t" // *overflow

  194.         : "=g" (*overflow)

  195.         : "g" (s->max_qcoeff)

  196.         );

  197.     }

  198. 

  199.     if(s->mb_intra) block[0]= level;

  200.     else            block[0]= temp_block[0];

  201. 

  202.     if(s->dsp.idct_permutation_type == FF_SIMPLE_IDCT_PERM){

  203.         if(last_non_zero_p1 <= 1) goto end;

  204.         block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];

  205.         block[0x20] = temp_block[0x10];

  206.         if(last_non_zero_p1 <= 4) goto end;

  207.         block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];

  208.         block[0x09] = temp_block[0x03];

  209.         if(last_non_zero_p1 <= 7) goto end;

  210.         block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];

  211.         block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];

  212.         if(last_non_zero_p1 <= 11) goto end;

  213.         block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];

  214.         block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];

  215.         block[0x0C] = temp_block[0x05];

  216.         if(last_non_zero_p1 <= 16) goto end;

  217.         block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];

  218.         block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];

  219.         block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];

  220.         block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];

  221.         if(last_non_zero_p1 <= 24) goto end;

  222.         block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];

  223.         block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];

  224.         block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];

  225.         block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];

  226.         if(last_non_zero_p1 <= 32) goto end;

  227.         block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];

  228.         block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];

  229.         block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];

  230.         block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];

  231.         if(last_non_zero_p1 <= 40) goto end;

  232.         block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];

  233.         block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];

  234.         block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];

  235.         block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];

  236.         if(last_non_zero_p1 <= 48) goto end;

  237.         block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];

  238.         block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];

  239.         block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];

  240.         block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];

  241.         if(last_non_zero_p1 <= 56) goto end;

  242.         block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];

  243.         block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];

  244.         block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];

  245.         block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];

  246.     }else if(s->dsp.idct_permutation_type == FF_LIBMPEG2_IDCT_PERM){

  247.         if(last_non_zero_p1 <= 1) goto end;

  248.         block[0x04] = temp_block[0x01];

  249.         block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];

  250.         if(last_non_zero_p1 <= 4) goto end;

  251.         block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];

  252.         block[0x05] = temp_block[0x03];

  253.         if(last_non_zero_p1 <= 7) goto end;

  254.         block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];

  255.         block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];

  256.         if(last_non_zero_p1 <= 11) goto end;

  257.         block[0x1C] = temp_block[0x19];

  258.         block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];

  259.         block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];

  260.         if(last_non_zero_p1 <= 16) goto end;

  261.         block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];

  262.         block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];

  263.         block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];

  264.         block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];

  265.         if(last_non_zero_p1 <= 24) goto end;

  266.         block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];

  267.         block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];

  268.         block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];

  269.         block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];

  270.         if(last_non_zero_p1 <= 32) goto end;

  271.         block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];

  272.         block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];

  273.         block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];

  274.         block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];

  275.         if(last_non_zero_p1 <= 40) goto end;

  276.         block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];

  277.         block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];

  278.         block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];

  279.         block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];

  280.         if(last_non_zero_p1 <= 48) goto end;

  281.         block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];

  282.         block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];

  283.             block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];

  284.         block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];

  285.         if(last_non_zero_p1 <= 56) goto end;

  286.         block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];

  287.         block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];

  288.         block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];

  289.         block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];

  290.     }else{

  291.         if(last_non_zero_p1 <= 1) goto end;

  292.         block[0x01] = temp_block[0x01];

  293.         block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];

  294.         if(last_non_zero_p1 <= 4) goto end;

  295.         block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];

  296.         block[0x03] = temp_block[0x03];

  297.         if(last_non_zero_p1 <= 7) goto end;

  298.         block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];

  299.         block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];

  300.         if(last_non_zero_p1 <= 11) goto end;

  301.         block[0x19] = temp_block[0x19];

  302.         block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];

  303.         block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];

  304.         if(last_non_zero_p1 <= 16) goto end;

  305.         block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];

  306.         block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];

  307.         block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];

  308.         block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];

  309.         if(last_non_zero_p1 <= 24) goto end;

  310.         block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];

  311.         block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];

  312.         block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];

  313.         block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];

  314.         if(last_non_zero_p1 <= 32) goto end;

  315.         block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];

  316.         block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];

  317.         block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];

  318.         block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];

  319.         if(last_non_zero_p1 <= 40) goto end;

  320.         block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];

  321.         block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];

  322.         block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];

  323.         block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];

  324.         if(last_non_zero_p1 <= 48) goto end;

  325.         block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];

  326.         block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];

  327.         block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];

  328.         block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];

  329.         if(last_non_zero_p1 <= 56) goto end;

  330.         block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];

  331.         block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];

  332.         block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];

  333.         block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];

  334.     }

  335.     end:

  336. /*

  337.     for(i=0; i<last_non_zero_p1; i++)

  338.     {

  339.        int j= zigzag_direct_noperm[i];

  340.        block[block_permute_op(j)]= temp_block[j];

  341.     }

  342. */

  343. 

  344.     return last_non_zero_p1 - 1;

  345. }