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207 lines
5.7 KiB
207 lines
5.7 KiB
/* |
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Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at> |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#undef SPREADW |
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#undef PMAXW |
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#ifdef HAVE_MMX2 |
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#define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t" |
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#define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t" |
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#else |
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#define SPREADW(a) \ |
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"punpcklwd " #a ", " #a " \n\t"\ |
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"punpcklwd " #a ", " #a " \n\t" |
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#define PMAXW(a,b) \ |
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"psubusw " #a ", " #b " \n\t"\ |
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"paddw " #a ", " #b " \n\t" |
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#endif |
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static int RENAME(dct_quantize)(MpegEncContext *s, |
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DCTELEM *block, int n, |
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int qscale) |
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{ |
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int i, level, last_non_zero_p1, q; |
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const UINT16 *qmat; |
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static __align8 INT16 temp_block[64]; |
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int minLevel, maxLevel; |
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if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){ |
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/* mpeg4 */ |
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minLevel= -2048; |
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maxLevel= 2047; |
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}else if(s->out_format==FMT_MPEG1){ |
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/* mpeg1 */ |
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minLevel= -255; |
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maxLevel= 255; |
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}else if(s->out_format==FMT_MJPEG){ |
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/* (m)jpeg */ |
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minLevel= -1023; |
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maxLevel= 1023; |
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}else{ |
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/* h263 / msmpeg4 */ |
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minLevel= -128; |
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maxLevel= 127; |
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} |
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av_fdct (block); |
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if (s->mb_intra) { |
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int dummy; |
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if (n < 4) |
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q = s->y_dc_scale; |
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else |
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q = s->c_dc_scale; |
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/* note: block[0] is assumed to be positive */ |
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#if 1 |
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asm volatile ( |
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"xorl %%edx, %%edx \n\t" |
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"mul %%ecx \n\t" |
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: "=d" (temp_block[0]), "=a"(dummy) |
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: "a" (block[0] + (q >> 1)), "c" (inverse[q]) |
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); |
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#else |
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asm volatile ( |
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"xorl %%edx, %%edx \n\t" |
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"divw %%cx \n\t" |
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"movzwl %%ax, %%eax \n\t" |
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: "=a" (temp_block[0]) |
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: "a" (block[0] + (q >> 1)), "c" (q) |
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: "%edx" |
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); |
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#endif |
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// temp_block[0] = (block[0] + (q >> 1)) / q; |
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i = 1; |
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last_non_zero_p1 = 1; |
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if (s->out_format == FMT_H263) { |
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qmat = s->q_non_intra_matrix16; |
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} else { |
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qmat = s->q_intra_matrix16; |
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} |
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for(i=1;i<4;i++) { |
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level = block[i] * qmat[i]; |
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level = level / (1 << (QMAT_SHIFT_MMX - 3)); |
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/* XXX: currently, this code is not optimal. the range should be: |
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mpeg1: -255..255 |
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mpeg2: -2048..2047 |
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h263: -128..127 |
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mpeg4: -2048..2047 |
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*/ |
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if (level > maxLevel) |
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level = maxLevel; |
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else if (level < minLevel) |
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level = minLevel; |
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temp_block[i] = level; |
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if(level) |
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if(last_non_zero_p1 < inv_zigzag_direct16[i]) last_non_zero_p1= inv_zigzag_direct16[i]; |
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block[i]=0; |
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} |
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} else { |
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i = 0; |
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last_non_zero_p1 = 0; |
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qmat = s->q_non_intra_matrix16; |
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} |
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asm volatile( /* XXX: small rounding bug, but it shouldnt matter */ |
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"movd %3, %%mm3 \n\t" |
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SPREADW(%%mm3) |
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"movd %4, %%mm4 \n\t" |
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SPREADW(%%mm4) |
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#ifndef HAVE_MMX2 |
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"movd %5, %%mm5 \n\t" |
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SPREADW(%%mm5) |
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#endif |
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"pxor %%mm7, %%mm7 \n\t" |
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"movd %%eax, %%mm2 \n\t" |
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SPREADW(%%mm2) |
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"movl %6, %%eax \n\t" |
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".balign 16 \n\t" |
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"1: \n\t" |
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"movq (%1, %%eax), %%mm0 \n\t" |
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"movq (%2, %%eax), %%mm1 \n\t" |
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"movq %%mm0, %%mm6 \n\t" |
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"psraw $15, %%mm6 \n\t" |
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"pmulhw %%mm0, %%mm1 \n\t" |
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"psubsw %%mm6, %%mm1 \n\t" |
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#ifdef HAVE_MMX2 |
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"pminsw %%mm3, %%mm1 \n\t" |
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"pmaxsw %%mm4, %%mm1 \n\t" |
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#else |
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"paddsw %%mm3, %%mm1 \n\t" |
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"psubusw %%mm4, %%mm1 \n\t" |
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"paddsw %%mm5, %%mm1 \n\t" |
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#endif |
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"movq %%mm1, (%8, %%eax) \n\t" |
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"pcmpeqw %%mm7, %%mm1 \n\t" |
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"movq (%7, %%eax), %%mm0 \n\t" |
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"movq %%mm7, (%1, %%eax) \n\t" |
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"pandn %%mm0, %%mm1 \n\t" |
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PMAXW(%%mm1, %%mm2) |
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"addl $8, %%eax \n\t" |
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" js 1b \n\t" |
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"movq %%mm2, %%mm0 \n\t" |
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"psrlq $32, %%mm2 \n\t" |
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PMAXW(%%mm0, %%mm2) |
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"movq %%mm2, %%mm0 \n\t" |
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"psrlq $16, %%mm2 \n\t" |
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PMAXW(%%mm0, %%mm2) |
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"movd %%mm2, %%eax \n\t" |
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"movzbl %%al, %%eax \n\t" |
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: "+a" (last_non_zero_p1) |
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: "r" (block+64), "r" (qmat+64), |
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#ifdef HAVE_MMX2 |
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"m" (maxLevel), "m" (minLevel), "m" (minLevel /* dummy */), "g" (2*i - 128), |
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#else |
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"m" (0x7FFF - maxLevel), "m" (0x7FFF -maxLevel + minLevel), "m" (minLevel), "g" (2*i - 128), |
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#endif |
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"r" (inv_zigzag_direct16+64), "r" (temp_block+64) |
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); |
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// last_non_zero_p1=64; |
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/* permute for IDCT */ |
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asm volatile( |
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"movl %0, %%eax \n\t" |
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"pushl %%ebp \n\t" |
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"movl %%esp, " MANGLE(esp_temp) "\n\t" |
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"1: \n\t" |
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"movzbl (%1, %%eax), %%ebx \n\t" |
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"movzbl 1(%1, %%eax), %%ebp \n\t" |
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"movw (%2, %%ebx, 2), %%cx \n\t" |
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"movw (%2, %%ebp, 2), %%sp \n\t" |
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"movzbl " MANGLE(permutation) "(%%ebx), %%ebx\n\t" |
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"movzbl " MANGLE(permutation) "(%%ebp), %%ebp\n\t" |
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"movw %%cx, (%3, %%ebx, 2) \n\t" |
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"movw %%sp, (%3, %%ebp, 2) \n\t" |
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"addl $2, %%eax \n\t" |
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" js 1b \n\t" |
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"movl " MANGLE(esp_temp) ", %%esp\n\t" |
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"popl %%ebp \n\t" |
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: |
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: "g" (-last_non_zero_p1), "d" (zigzag_direct_noperm+last_non_zero_p1), "S" (temp_block), "D" (block) |
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: "%eax", "%ebx", "%ecx" |
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); |
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/* |
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for(i=0; i<last_non_zero_p1; i++) |
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{ |
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int j= zigzag_direct_noperm[i]; |
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block[block_permute_op(j)]= temp_block[j]; |
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} |
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*/ |
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//block_permute(block); |
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return last_non_zero_p1 - 1; |
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}
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