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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. 

  29. #undef MMREG_WIDTH

  30. #undef MM

  31. #undef MOVQ

  32. #undef SPREADW

  33. #undef PMAXW

  34. #undef PMAX

  35. #undef SAVE_SIGN

  36. #undef RESTORE_SIGN

  37. 

  38. #if COMPILE_TEMPLATE_SSE2

  39. #define MMREG_WIDTH "16"

  40. #define MM "%%xmm"

  41. #define MOVQ "movdqa"

  42. #define SPREADW(a) \

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

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

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

  46. #define PMAX(a,b) \

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

  48.             PMAXW(b, a)\

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

  50.             PMAXW(b, a)\

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

  52.             PMAXW(b, a)

  53. #else

  54. #define MMREG_WIDTH "8"

  55. #define MM "%%mm"

  56. #define MOVQ "movq"

  57. #if COMPILE_TEMPLATE_MMXEXT

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

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

  60. #define PMAX(a,b) \

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

  62.             PMAXW(b, a)\

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

  64.             PMAXW(b, a)

  65. #else

  66. #define SPREADW(a) \

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

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

  69. #define PMAXW(a,b) \

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

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

  72. #define PMAX(a,b)  \

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

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

  75.             PMAXW(b, a)\

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

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

  78.             PMAXW(b, a)

  79. 

  80. #endif

  81. #endif

  82. 

  83. #if COMPILE_TEMPLATE_SSSE3

  84. #define SAVE_SIGN(a,b) \

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

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

  87. #define RESTORE_SIGN(a,b) \

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

  89. #else

  90. #define SAVE_SIGN(a,b) \

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

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

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

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

  95. #define RESTORE_SIGN(a,b) \

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

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

  98. #endif

  99. 

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

  101.                             int16_t *block, int n,

  102.                             int qscale, int *overflow)

  103. {

  104.     x86_reg last_non_zero_p1;

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

  106.     const uint16_t *qmat, *bias;

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

  108. 

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

  110. 

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

  112.     RENAMEl(ff_fdct) (block); //cannot be anything else ...

  113. 

  114.     if(s->dct_error_sum)

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

  116. 

  117.     if (s->mb_intra) {

  118.         int dummy;

  119.         if (n < 4)

  120.             q = s->y_dc_scale;

  121.         else

  122.             q = s->c_dc_scale;

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

  124.         if (!s->h263_aic) {

  125.         __asm__ volatile (

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

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

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

  129.         );

  130.         } else

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

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

  133. 

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

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

  136.         last_non_zero_p1 = 1;

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

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

  139.     } else {

  140.         last_non_zero_p1 = 0;

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

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

  143.     }

  144. 

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

  146. 

  147.         __asm__ volatile(

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

  149.             SPREADW(MM"3")

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

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

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

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

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

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

  156.             ".p2align 4                         \n\t"

  157.             "1:                                 \n\t"

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

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

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

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

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

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

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

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

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

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

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

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

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

  171.             " js 1b                             \n\t"

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

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

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

  175.             : "+a" (last_non_zero_p1)

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

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

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

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

  180.         );

  181.     }else{ // FMT_H263

  182.         __asm__ volatile(

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

  184.             SPREADW(MM"3")

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

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

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

  188.             ".p2align 4                         \n\t"

  189.             "1:                                 \n\t"

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  205.             " js 1b                             \n\t"

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

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

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

  209.             : "+a" (last_non_zero_p1)

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

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

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

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

  214.         );

  215.     }

  216.     __asm__ volatile(

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

  218.         SPREADW(MM"1")

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

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

  221. #if COMPILE_TEMPLATE_SSE2

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

  223. #endif

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

  225.         : "=g" (*overflow)

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

  227.     );

  228. 

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

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

  231. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  276.     }else{

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  320.     }

  321.     end:

  322.     return last_non_zero_p1 - 1;

  323. }