FFmpeg: libavcodec/x86/mpegvideo_mmx

00001 /*
00002  * MPEG video MMX templates
00003  *
00004  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #undef MMREG_WIDTH
00024 #undef MM
00025 #undef MOVQ
00026 #undef SPREADW
00027 #undef PMAXW
00028 #undef PMAX
00029 #undef SAVE_SIGN
00030 #undef RESTORE_SIGN
00031 
00032 #if HAVE_SSE2
00033 #define MMREG_WIDTH "16"
00034 #define MM "%%xmm"
00035 #define MOVQ "movdqa"
00036 #define SPREADW(a) \
00037             "pshuflw $0, "a", "a"       \n\t"\
00038             "punpcklwd "a", "a"         \n\t"
00039 #define PMAXW(a,b) "pmaxsw "a", "b"     \n\t"
00040 #define PMAX(a,b) \
00041             "movhlps "a", "b"           \n\t"\
00042             PMAXW(b, a)\
00043             "pshuflw $0x0E, "a", "b"    \n\t"\
00044             PMAXW(b, a)\
00045             "pshuflw $0x01, "a", "b"    \n\t"\
00046             PMAXW(b, a)
00047 #else
00048 #define MMREG_WIDTH "8"
00049 #define MM "%%mm"
00050 #define MOVQ "movq"
00051 #if HAVE_MMX2
00052 #define SPREADW(a) "pshufw $0, "a", "a" \n\t"
00053 #define PMAXW(a,b) "pmaxsw "a", "b"     \n\t"
00054 #define PMAX(a,b) \
00055             "pshufw $0x0E, "a", "b"     \n\t"\
00056             PMAXW(b, a)\
00057             "pshufw $0x01, "a", "b"     \n\t"\
00058             PMAXW(b, a)
00059 #else
00060 #define SPREADW(a) \
00061             "punpcklwd "a", "a"         \n\t"\
00062             "punpcklwd "a", "a"         \n\t"
00063 #define PMAXW(a,b) \
00064             "psubusw "a", "b"           \n\t"\
00065             "paddw "a", "b"             \n\t"
00066 #define PMAX(a,b)  \
00067             "movq "a", "b"              \n\t"\
00068             "psrlq $32, "a"             \n\t"\
00069             PMAXW(b, a)\
00070             "movq "a", "b"              \n\t"\
00071             "psrlq $16, "a"             \n\t"\
00072             PMAXW(b, a)
00073 
00074 #endif
00075 #endif
00076 
00077 #if HAVE_SSSE3
00078 #define SAVE_SIGN(a,b) \
00079             "movdqa "b", "a"            \n\t"\
00080             "pabsw  "b", "b"            \n\t"
00081 #define RESTORE_SIGN(a,b) \
00082             "psignw "a", "b"            \n\t"
00083 #else
00084 #define SAVE_SIGN(a,b) \
00085             "pxor "a", "a"              \n\t"\
00086             "pcmpgtw "b", "a"           \n\t" /* block[i] <= 0 ? 0xFF : 0x00 */\
00087             "pxor "a", "b"              \n\t"\
00088             "psubw "a", "b"             \n\t" /* ABS(block[i]) */
00089 #define RESTORE_SIGN(a,b) \
00090             "pxor "a", "b"              \n\t"\
00091             "psubw "a", "b"             \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
00092 #endif
00093 
00094 static int RENAME(dct_quantize)(MpegEncContext *s,
00095                             DCTELEM *block, int n,
00096                             int qscale, int *overflow)
00097 {
00098     x86_reg last_non_zero_p1;
00099     int level=0, q; //=0 is because gcc says uninitialized ...
00100     const uint16_t *qmat, *bias;
00101     DECLARE_ALIGNED(16, int16_t, temp_block)[64];
00102 
00103     assert((7&(int)(&temp_block[0])) == 0); //did gcc align it correctly?
00104 
00105     //s->fdct (block);
00106     RENAMEl(ff_fdct) (block); //cannot be anything else ...
00107 
00108     if(s->dct_error_sum)
00109         s->denoise_dct(s, block);
00110 
00111     if (s->mb_intra) {
00112         int dummy;
00113         if (n < 4)
00114             q = s->y_dc_scale;
00115         else
00116             q = s->c_dc_scale;
00117         /* note: block[0] is assumed to be positive */
00118         if (!s->h263_aic) {
00119 #if 1
00120         __asm__ volatile (
00121                 "mul %%ecx                \n\t"
00122                 : "=d" (level), "=a"(dummy)
00123                 : "a" ((block[0]>>2) + q), "c" (ff_inverse[q<<1])
00124         );
00125 #else
00126         __asm__ volatile (
00127                 "xorl %%edx, %%edx        \n\t"
00128                 "divw %%cx                \n\t"
00129                 "movzwl %%ax, %%eax       \n\t"
00130                 : "=a" (level)
00131                 : "a" ((block[0]>>2) + q), "c" (q<<1)
00132                 : "%edx"
00133         );
00134 #endif
00135         } else
00136             /* For AIC we skip quant/dequant of INTRADC */
00137             level = (block[0] + 4)>>3;
00138 
00139         block[0]=0; //avoid fake overflow
00140 //        temp_block[0] = (block[0] + (q >> 1)) / q;
00141         last_non_zero_p1 = 1;
00142         bias = s->q_intra_matrix16[qscale][1];
00143         qmat = s->q_intra_matrix16[qscale][0];
00144     } else {
00145         last_non_zero_p1 = 0;
00146         bias = s->q_inter_matrix16[qscale][1];
00147         qmat = s->q_inter_matrix16[qscale][0];
00148     }
00149 
00150     if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){
00151 
00152         __asm__ volatile(
00153             "movd %%"REG_a", "MM"3              \n\t" // last_non_zero_p1
00154             SPREADW(MM"3")
00155             "pxor "MM"7, "MM"7                  \n\t" // 0
00156             "pxor "MM"4, "MM"4                  \n\t" // 0
00157             MOVQ" (%2), "MM"5                   \n\t" // qmat[0]
00158             "pxor "MM"6, "MM"6                  \n\t"
00159             "psubw (%3), "MM"6                  \n\t" // -bias[0]
00160             "mov $-128, %%"REG_a"               \n\t"
00161             ASMALIGN(4)
00162             "1:                                 \n\t"
00163             MOVQ" (%1, %%"REG_a"), "MM"0        \n\t" // block[i]
00164             SAVE_SIGN(MM"1", MM"0")                   // ABS(block[i])
00165             "psubusw "MM"6, "MM"0               \n\t" // ABS(block[i]) + bias[0]
00166             "pmulhw "MM"5, "MM"0                \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
00167             "por "MM"0, "MM"4                   \n\t"
00168             RESTORE_SIGN(MM"1", MM"0")                // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
00169             MOVQ" "MM"0, (%5, %%"REG_a")        \n\t"
00170             "pcmpeqw "MM"7, "MM"0               \n\t" // out==0 ? 0xFF : 0x00
00171             MOVQ" (%4, %%"REG_a"), "MM"1        \n\t"
00172             MOVQ" "MM"7, (%1, %%"REG_a")        \n\t" // 0
00173             "pandn "MM"1, "MM"0                 \n\t"
00174             PMAXW(MM"0", MM"3")
00175             "add $"MMREG_WIDTH", %%"REG_a"      \n\t"
00176             " js 1b                             \n\t"
00177             PMAX(MM"3", MM"0")
00178             "movd "MM"3, %%"REG_a"              \n\t"
00179             "movzb %%al, %%"REG_a"              \n\t" // last_non_zero_p1
00180             : "+a" (last_non_zero_p1)
00181             : "r" (block+64), "r" (qmat), "r" (bias),
00182               "r" (inv_zigzag_direct16+64), "r" (temp_block+64)
00183         );
00184     }else{ // FMT_H263
00185         __asm__ volatile(
00186             "movd %%"REG_a", "MM"3              \n\t" // last_non_zero_p1
00187             SPREADW(MM"3")
00188             "pxor "MM"7, "MM"7                  \n\t" // 0
00189             "pxor "MM"4, "MM"4                  \n\t" // 0
00190             "mov $-128, %%"REG_a"               \n\t"
00191             ASMALIGN(4)
00192             "1:                                 \n\t"
00193             MOVQ" (%1, %%"REG_a"), "MM"0        \n\t" // block[i]
00194             SAVE_SIGN(MM"1", MM"0")                   // ABS(block[i])
00195             MOVQ" (%3, %%"REG_a"), "MM"6        \n\t" // bias[0]
00196             "paddusw "MM"6, "MM"0               \n\t" // ABS(block[i]) + bias[0]
00197             MOVQ" (%2, %%"REG_a"), "MM"5        \n\t" // qmat[i]
00198             "pmulhw "MM"5, "MM"0                \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
00199             "por "MM"0, "MM"4                   \n\t"
00200             RESTORE_SIGN(MM"1", MM"0")                // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
00201             MOVQ" "MM"0, (%5, %%"REG_a")        \n\t"
00202             "pcmpeqw "MM"7, "MM"0               \n\t" // out==0 ? 0xFF : 0x00
00203             MOVQ" (%4, %%"REG_a"), "MM"1        \n\t"
00204             MOVQ" "MM"7, (%1, %%"REG_a")        \n\t" // 0
00205             "pandn "MM"1, "MM"0                 \n\t"
00206             PMAXW(MM"0", MM"3")
00207             "add $"MMREG_WIDTH", %%"REG_a"      \n\t"
00208             " js 1b                             \n\t"
00209             PMAX(MM"3", MM"0")
00210             "movd "MM"3, %%"REG_a"              \n\t"
00211             "movzb %%al, %%"REG_a"              \n\t" // last_non_zero_p1
00212             : "+a" (last_non_zero_p1)
00213             : "r" (block+64), "r" (qmat+64), "r" (bias+64),
00214               "r" (inv_zigzag_direct16+64), "r" (temp_block+64)
00215         );
00216     }
00217     __asm__ volatile(
00218         "movd %1, "MM"1                     \n\t" // max_qcoeff
00219         SPREADW(MM"1")
00220         "psubusw "MM"1, "MM"4               \n\t"
00221         "packuswb "MM"4, "MM"4              \n\t"
00222 #if HAVE_SSE2
00223         "packuswb "MM"4, "MM"4              \n\t"
00224 #endif
00225         "movd "MM"4, %0                     \n\t" // *overflow
00226         : "=g" (*overflow)
00227         : "g" (s->max_qcoeff)
00228     );
00229 
00230     if(s->mb_intra) block[0]= level;
00231     else            block[0]= temp_block[0];
00232 
00233     if(s->dsp.idct_permutation_type == FF_SIMPLE_IDCT_PERM){
00234         if(last_non_zero_p1 <= 1) goto end;
00235         block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];
00236         block[0x20] = temp_block[0x10];
00237         if(last_non_zero_p1 <= 4) goto end;
00238         block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];
00239         block[0x09] = temp_block[0x03];
00240         if(last_non_zero_p1 <= 7) goto end;
00241         block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];
00242         block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];
00243         if(last_non_zero_p1 <= 11) goto end;
00244         block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];
00245         block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];
00246         block[0x0C] = temp_block[0x05];
00247         if(last_non_zero_p1 <= 16) goto end;
00248         block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];
00249         block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];
00250         block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];
00251         block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];
00252         if(last_non_zero_p1 <= 24) goto end;
00253         block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];
00254         block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];
00255         block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];
00256         block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];
00257         if(last_non_zero_p1 <= 32) goto end;
00258         block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];
00259         block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];
00260         block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];
00261         block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];
00262         if(last_non_zero_p1 <= 40) goto end;
00263         block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];
00264         block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];
00265         block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];
00266         block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];
00267         if(last_non_zero_p1 <= 48) goto end;
00268         block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
00269         block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];
00270         block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
00271         block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
00272         if(last_non_zero_p1 <= 56) goto end;
00273         block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];
00274         block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];
00275         block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];
00276         block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
00277     }else if(s->dsp.idct_permutation_type == FF_LIBMPEG2_IDCT_PERM){
00278         if(last_non_zero_p1 <= 1) goto end;
00279         block[0x04] = temp_block[0x01];
00280         block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
00281         if(last_non_zero_p1 <= 4) goto end;
00282         block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];
00283         block[0x05] = temp_block[0x03];
00284         if(last_non_zero_p1 <= 7) goto end;
00285         block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];
00286         block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
00287         if(last_non_zero_p1 <= 11) goto end;
00288         block[0x1C] = temp_block[0x19];
00289         block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];
00290         block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];
00291         if(last_non_zero_p1 <= 16) goto end;
00292         block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];
00293         block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];
00294         block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
00295         block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];
00296         if(last_non_zero_p1 <= 24) goto end;
00297         block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];
00298         block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];
00299         block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];
00300         block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];
00301         if(last_non_zero_p1 <= 32) goto end;
00302         block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];
00303         block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];
00304         block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];
00305         block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];
00306         if(last_non_zero_p1 <= 40) goto end;
00307         block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];
00308         block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
00309         block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];
00310         block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];
00311         if(last_non_zero_p1 <= 48) goto end;
00312         block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];
00313         block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];
00314             block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
00315         block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];
00316         if(last_non_zero_p1 <= 56) goto end;
00317         block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];
00318         block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];
00319         block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
00320         block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
00321     }else{
00322         if(last_non_zero_p1 <= 1) goto end;
00323         block[0x01] = temp_block[0x01];
00324         block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
00325         if(last_non_zero_p1 <= 4) goto end;
00326         block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];
00327         block[0x03] = temp_block[0x03];
00328         if(last_non_zero_p1 <= 7) goto end;
00329         block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];
00330         block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
00331         if(last_non_zero_p1 <= 11) goto end;
00332         block[0x19] = temp_block[0x19];
00333         block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];
00334         block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];
00335         if(last_non_zero_p1 <= 16) goto end;
00336         block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];
00337         block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];
00338         block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
00339         block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];
00340         if(last_non_zero_p1 <= 24) goto end;
00341         block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];
00342         block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];
00343         block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];
00344         block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];
00345         if(last_non_zero_p1 <= 32) goto end;
00346         block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];
00347         block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];
00348         block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];
00349         block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
00350         if(last_non_zero_p1 <= 40) goto end;
00351         block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];
00352         block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
00353         block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];
00354         block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];
00355         if(last_non_zero_p1 <= 48) goto end;
00356         block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
00357         block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
00358         block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
00359         block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];
00360         if(last_non_zero_p1 <= 56) goto end;
00361         block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];
00362         block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
00363         block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
00364         block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
00365     }
00366     end:
00367 /*
00368     for(i=0; i<last_non_zero_p1; i++)
00369     {
00370        int j= zigzag_direct_noperm[i];
00371        block[block_permute_op(j)]= temp_block[j];
00372     }
00373 */
00374 
00375     return last_non_zero_p1 - 1;
00376 }
libavcodec/x86/mpegvideo_mmx_template.c
