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FFmpeg/libavcodec/x86/mpegvideoenc_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 file is part of Libav.

  7.  *

  8.  * Libav is free software; you can redistribute it and/or

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

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

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * Libav is distributed in the hope that it will be useful,

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

  19.  * License along with Libav; if not, write to the Free Software

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

  21.  */

  22. 

  23. #include <stdint.h>

  24. 

  25. #include "libavutil/internal.h"

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

  27. #include "libavcodec/mpegvideo.h"

  28. #include "fdct.h"

  29. 

  30. #undef MMREG_WIDTH

  31. #undef MM

  32. #undef MOVQ

  33. #undef SPREADW

  34. #undef PMAXW

  35. #undef PMAX

  36. #undef SAVE_SIGN

  37. #undef RESTORE_SIGN

  38. 

  39. #if COMPILE_TEMPLATE_SSE2

  40. #define MMREG_WIDTH "16"

  41. #define MM "%%xmm"

  42. #define MOVQ "movdqa"

  43. #define SPREADW(a) \

  44.             "pshuflw $0, "a", "a"       \n\t"\

  45.             "punpcklwd "a", "a"         \n\t"

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

  47. #define PMAX(a,b) \

  48.             "movhlps "a", "b"           \n\t"\

  49.             PMAXW(b, a)\

  50.             "pshuflw $0x0E, "a", "b"    \n\t"\

  51.             PMAXW(b, a)\

  52.             "pshuflw $0x01, "a", "b"    \n\t"\

  53.             PMAXW(b, a)

  54. #else

  55. #define MMREG_WIDTH "8"

  56. #define MM "%%mm"

  57. #define MOVQ "movq"

  58. #if COMPILE_TEMPLATE_MMXEXT

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

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

  61. #define PMAX(a,b) \

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

  63.             PMAXW(b, a)\

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

  65.             PMAXW(b, a)

  66. #else

  67. #define SPREADW(a) \

  68.             "punpcklwd "a", "a"         \n\t"\

  69.             "punpcklwd "a", "a"         \n\t"

  70. #define PMAXW(a,b) \

  71.             "psubusw "a", "b"           \n\t"\

  72.             "paddw "a", "b"             \n\t"

  73. #define PMAX(a,b)  \

  74.             "movq "a", "b"              \n\t"\

  75.             "psrlq $32, "a"             \n\t"\

  76.             PMAXW(b, a)\

  77.             "movq "a", "b"              \n\t"\

  78.             "psrlq $16, "a"             \n\t"\

  79.             PMAXW(b, a)

  80. 

  81. #endif

  82. #endif

  83. 

  84. #if COMPILE_TEMPLATE_SSSE3

  85. #define SAVE_SIGN(a,b) \

  86.             "movdqa "b", "a"            \n\t"\

  87.             "pabsw  "b", "b"            \n\t"

  88. #define RESTORE_SIGN(a,b) \

  89.             "psignw "a", "b"            \n\t"

  90. #else

  91. #define SAVE_SIGN(a,b) \

  92.             "pxor "a", "a"              \n\t"\

  93.             "pcmpgtw "b", "a"           \n\t" /* block[i] <= 0 ? 0xFF : 0x00 */\

  94.             "pxor "a", "b"              \n\t"\

  95.             "psubw "a", "b"             \n\t" /* ABS(block[i]) */

  96. #define RESTORE_SIGN(a,b) \

  97.             "pxor "a", "b"              \n\t"\

  98.             "psubw "a", "b"             \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  99. #endif

  100. 

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

  102.                             int16_t *block, int n,

  103.                             int qscale, int *overflow)

  104. {

  105.     x86_reg last_non_zero_p1;

  106.     int level=0, q; //=0 is because gcc says uninitialized ...

  107.     const uint16_t *qmat, *bias;

  108.     LOCAL_ALIGNED_16(int16_t, temp_block, [64]);

  109. 

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

  111. 

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

  113.     RENAME_FDCT(ff_fdct)(block); // cannot be anything else ...

  114. 

  115.     if(s->dct_error_sum)

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

  117. 

  118.     if (s->mb_intra) {

  119.         int dummy;

  120.         if (n < 4)

  121.             q = s->y_dc_scale;

  122.         else

  123.             q = s->c_dc_scale;

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

  125.         if (!s->h263_aic) {

  126.         __asm__ volatile (

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

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

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

  130.         );

  131.         } else

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

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

  134. 

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

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

  137.         last_non_zero_p1 = 1;

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

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

  140.     } else {

  141.         last_non_zero_p1 = 0;

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

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

  144.     }

  145. 

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

  147. 

  148.         __asm__ volatile(

  149.             "movd %%"REG_a", "MM"3              \n\t" // last_non_zero_p1

  150.             SPREADW(MM"3")

  151.             "pxor "MM"7, "MM"7                  \n\t" // 0

  152.             "pxor "MM"4, "MM"4                  \n\t" // 0

  153.             MOVQ" (%2), "MM"5                   \n\t" // qmat[0]

  154.             "pxor "MM"6, "MM"6                  \n\t"

  155.             "psubw (%3), "MM"6                  \n\t" // -bias[0]

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

  157.             ".p2align 4                         \n\t"

  158.             "1:                                 \n\t"

  159.             MOVQ" (%1, %%"REG_a"), "MM"0        \n\t" // block[i]

  160.             SAVE_SIGN(MM"1", MM"0")                   // ABS(block[i])

  161.             "psubusw "MM"6, "MM"0               \n\t" // ABS(block[i]) + bias[0]

  162.             "pmulhw "MM"5, "MM"0                \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16

  163.             "por "MM"0, "MM"4                   \n\t"

  164.             RESTORE_SIGN(MM"1", MM"0")                // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  165.             MOVQ" "MM"0, (%5, %%"REG_a")        \n\t"

  166.             "pcmpeqw "MM"7, "MM"0               \n\t" // out==0 ? 0xFF : 0x00

  167.             MOVQ" (%4, %%"REG_a"), "MM"1        \n\t"

  168.             MOVQ" "MM"7, (%1, %%"REG_a")        \n\t" // 0

  169.             "pandn "MM"1, "MM"0                 \n\t"

  170.             PMAXW(MM"0", MM"3")

  171.             "add $"MMREG_WIDTH", %%"REG_a"      \n\t"

  172.             " js 1b                             \n\t"

  173.             PMAX(MM"3", MM"0")

  174.             "movd "MM"3, %%"REG_a"              \n\t"

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

  176.             : "+a" (last_non_zero_p1)

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

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

  179.               XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",

  180.                                 "%xmm4", "%xmm5", "%xmm6", "%xmm7")

  181.         );

  182.     }else{ // FMT_H263

  183.         __asm__ volatile(

  184.             "movd %%"REG_a", "MM"3              \n\t" // last_non_zero_p1

  185.             SPREADW(MM"3")

  186.             "pxor "MM"7, "MM"7                  \n\t" // 0

  187.             "pxor "MM"4, "MM"4                  \n\t" // 0

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

  189.             ".p2align 4                         \n\t"

  190.             "1:                                 \n\t"

  191.             MOVQ" (%1, %%"REG_a"), "MM"0        \n\t" // block[i]

  192.             SAVE_SIGN(MM"1", MM"0")                   // ABS(block[i])

  193.             MOVQ" (%3, %%"REG_a"), "MM"6        \n\t" // bias[0]

  194.             "paddusw "MM"6, "MM"0               \n\t" // ABS(block[i]) + bias[0]

  195.             MOVQ" (%2, %%"REG_a"), "MM"5        \n\t" // qmat[i]

  196.             "pmulhw "MM"5, "MM"0                \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16

  197.             "por "MM"0, "MM"4                   \n\t"

  198.             RESTORE_SIGN(MM"1", MM"0")                // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])

  199.             MOVQ" "MM"0, (%5, %%"REG_a")        \n\t"

  200.             "pcmpeqw "MM"7, "MM"0               \n\t" // out==0 ? 0xFF : 0x00

  201.             MOVQ" (%4, %%"REG_a"), "MM"1        \n\t"

  202.             MOVQ" "MM"7, (%1, %%"REG_a")        \n\t" // 0

  203.             "pandn "MM"1, "MM"0                 \n\t"

  204.             PMAXW(MM"0", MM"3")

  205.             "add $"MMREG_WIDTH", %%"REG_a"      \n\t"

  206.             " js 1b                             \n\t"

  207.             PMAX(MM"3", MM"0")

  208.             "movd "MM"3, %%"REG_a"              \n\t"

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

  210.             : "+a" (last_non_zero_p1)

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

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

  213.               XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",

  214.                                 "%xmm4", "%xmm5", "%xmm6", "%xmm7")

  215.         );

  216.     }

  217.     __asm__ volatile(

  218.         "movd %1, "MM"1                     \n\t" // max_qcoeff

  219.         SPREADW(MM"1")

  220.         "psubusw "MM"1, "MM"4               \n\t"

  221.         "packuswb "MM"4, "MM"4              \n\t"

  222. #if COMPILE_TEMPLATE_SSE2

  223.         "packuswb "MM"4, "MM"4              \n\t"

  224. #endif

  225.         "movd "MM"4, %0                     \n\t" // *overflow

  226.         : "=g" (*overflow)

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

  228.     );

  229. 

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

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

  232. 

  233.     if (s->idsp.perm_type == FF_IDCT_PERM_SIMPLE) {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  277.     }else{

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  321.     }

  322.     end:

  323.     return last_non_zero_p1 - 1;

  324. }