mirror of https://git.ffmpeg.org/ffmpeg.git
208 lines
5.7 KiB
C
208 lines
5.7 KiB
C
/*
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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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