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

   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 }